lw2.lisp

   1 (uiop:define-package #:lw2-viewer
   2   (:use #:cl #:sb-thread #:flexi-streams #:djula #:iterate
   3         #:lw2-viewer.config #:lw2.utils #:lw2.lmdb #:lw2.backend #:lw2.links #:lw2.clean-html #:lw2.login #:lw2.context #:lw2.sites #:lw2.components #:lw2.html-reader #:lw2.fonts
   4         #:lw2.csrf
   5         #:lw2.graphql
   6         #:lw2.conditions
   7         #:lw2.routes
   8         #:lw2.response
   9         #:lw2.schema-type
  10         #:lw2.interface-utils
  11         #:lw2.user-context
  12         #:lw2.web-push
  13         #:lw2.data-viewers.post
  14         #:lw2.data-viewers.comment
  15         #:lw2.client-script
  16         #:lw2.resources)
  17   (:import-from #:alexandria #:with-gensyms #:once-only #:ensure-list #:when-let #:when-let* #:if-let #:alist-hash-table)
  18   (:import-from #:collectors #:with-collector)
  19   (:import-from #:ppcre #:regex-replace-all)
  20   (:unintern
  21     #:define-regex-handler #:*fonts-stylesheet-uri* #:generate-fonts-link
  22     #:user-nav-bar #:*primary-nav* #:*secondary-nav* #:*nav-bars*
  23     #:begin-html #:end-html
  24     #:*fonts-stylesheet-uris* #:*fonts-redirect-data* #:*fonts-redirect-lock* #:*fonts-redirect-thread*
  25     #:postprocess-conversation-title
  26     #:map-output
  27     #:*earliest-post*
  28     #:*extra-external-scripts* #:*extra-inline-scripts*
  29     #:site-stylesheets #:site-inline-scripts #:site-scripts #:site-external-scripts #:site-head-elements
  30     #:unwrap-stream
  31     #:sort-comments
  32     #:*html-head*
  33     #:with-open-tag)
  34   (:recycle #:lw2-viewer #:lw2.backend))
  35
  36 (in-package #:lw2-viewer)
  37
  38 (named-readtables:in-readtable html-reader)
  39
  40 (add-template-directory (asdf:system-relative-pathname "lw2-viewer" "templates/"))
  41
  42 (define-cache-database 'backend-lw2-legacy
  43     "auth-token-to-userid" "auth-token-to-username" "user-ignore-list")
  44
  45 (defvar *read-only-mode* nil)
  46 (defvar *read-only-default-message* "Due to a system outage, you cannot log in or post at this time.")
  47
  48 (defparameter *default-prefs* (alist :items-per-page 20 :default-sort "new"))
  49 (defvar *current-prefs* nil)
  50
  51 (defun get-post-sequences (post-id)
  52   (when-let (sequence-ids (get-post-sequence-ids post-id))
  53     (with-collector (col)
  54       (dolist (sequence-id sequence-ids)
  55         (let* ((sequence (get-sequence sequence-id))
  56                (posts (sequence-post-ids sequence)))
  57           (multiple-value-bind (prev next)
  58               (loop for prev = nil then (car current)
  59                  for current on posts
  60                  when (string= (car current) post-id)
  61                  return (values prev (second current)))
  62             (when (or prev next)
  63               (col (list sequence
  64                          (and prev (get-sequence-post sequence prev))
  65                          (and next (get-sequence-post sequence next))))))))
  66       (col))))
  67
  68 (defun rectify-post-relations (post-relations)
  69   (remove-if-not (lambda (pr) (cdr (assoc :--id (cdr (first pr))))) post-relations))
  70
  71 (defun post-nav-links (post post-sequences)
  72   <nav class="post-nav-links">
  73     (schema-bind (:post post (target-post-relations source-post-relations) :context :body)
  74       (let ((target-post-relations (rectify-post-relations target-post-relations))
  75             (source-post-relations (rectify-post-relations source-post-relations)))
  76         (when (or target-post-relations source-post-relations)
  77           <div class="related-posts">
  78           (dolist (relations `((,source-post-relations "Parent question")
  79                                (,target-post-relations "Sub-question")))
  80             (destructuring-bind (related-posts relation-type) relations
  81               (when related-posts
  82                 <div class="related-post-group">
  83                   <div class="related-post-type">("~A~A" relation-type (if (second related-posts) "s" ""))</div>
  84                   (dolist (post-relation related-posts)
  85                     (post-headline-to-html (or (cdr (assoc :source-post post-relation))
  86                                                (cdr (assoc :target-post post-relation)))))
  87                 </div>)))
  88           </div>)))
  89     (loop for (sequence prev next) in post-sequences do
  90       (progn
  91         <div class="post-nav-item sequence">
  92           <a class="post-nav sequence-title" href=("/s/~A" (cdr (assoc :--id sequence)))>
  93             <span class="post-nav-label">Part of the sequence:</span>
  94             <span class="post-nav-title">(safe (clean-text-to-html (cdr (assoc :title sequence))))</span>
  95           </a>
  96           (labels ((post-nav-link (direction post)
  97                      <a class=("post-nav ~A" (string-downcase direction)) href=(generate-item-link :post post)>
  98                        <span class="post-nav-label">(case direction (:prev "Previous: ") (:next "Next: "))</span>
  99                        <span class="post-nav-title">(safe (clean-text-to-html (cdr (assoc :title post))))</span>
 100                      </a>))
 101             (when prev (post-nav-link :prev prev))
 102             (when next (post-nav-link :next next)))
 103       </div>))
 104   </nav>)
 105
 106 (defun rectify-conversation (conversation)
 107   (alist-bind ((title (or null string)))
 108               conversation
 109     (if (or (null title) (string= title ""))
 110         (acons :title "[Untitled conversation]" conversation)
 111         conversation)))
 112
 113 (defun conversation-message-to-html (out-stream message)
 114   (alist-bind ((user-id string)
 115                (created-at string)
 116                (highlight-new boolean)
 117                (conversation list)
 118                (content list)
 119                (contents list)
 120                (html-body (or string null)))
 121               message
 122     (let ((conversation (rectify-conversation conversation)))
 123       (multiple-value-bind (pretty-time js-time) (pretty-time created-at)
 124         (format out-stream "<div class=\"comment private-message~A\"><div class=\"comment-meta\"><a class=\"author\" href=\"/users/~A\">~A</a> <span class=\"date\" data-js-date=\"~A\">~A~A</span><div class=\"comment-post-title\">Private message in: <a href=\"/conversation?id=~A\">~A</a></div></div><div class=\"body-text comment-body\">"
 125                 (if highlight-new " comment-item-highlight" "")
 126                 (encode-entities (get-user-slug user-id))
 127                 (encode-entities (get-username user-id))
 128                 js-time
 129                 pretty-time
 130                 (pretty-time-js)
 131                 (encode-entities (cdr (assoc :--id conversation)))
 132                 (encode-entities (cdr (assoc :title conversation)))))
 133       (labels ((ws (html-body) (let ((*memoized-output-stream* out-stream)) (clean-html* html-body))))
 134         (cond
 135           (contents (ws (cdr (assoc :html contents))))
 136           (html-body (ws html-body))
 137           (t (format out-stream "~{<p>~A</p>~}" (loop for block in (cdr (assoc :blocks content)) collect (encode-entities (cdr (assoc :text block))))))))
 138       (format out-stream "</div></div>"))))
 139
 140 (defun conversation-index-to-html (out-stream conversation)
 141   (alist-bind ((conversation-id string :--id)
 142                (title (or null string))
 143                (created-at (or null string))
 144                (participants list)
 145                (messages-total fixnum))
 146     (rectify-conversation conversation)
 147     (multiple-value-bind (pretty-time js-time) (if created-at (pretty-time created-at) (values "[Error]" 0))
 148       (format out-stream "<h1 class=\"listing\"><a href=\"/conversation?id=~A\">~A</a></h1><div class=\"post-meta\"><div class=\"conversation-participants\"><ul>~:{<li><a href=\"/users/~A\">~A</a></li>~}</ul></div><div class=\"messages-count\">~A</div><div class=\"date\" data-js-date=\"~A\">~A~A</div></div>"
 149               (encode-entities conversation-id)
 150               (encode-entities title)
 151               (loop for p in participants
 152                     collect (list (encode-entities (cdr (assoc :slug p))) (encode-entities (cdr (assoc :display-name p)))))
 153               (pretty-number messages-total "message")
 154               js-time
 155               pretty-time
 156               (pretty-time-js)))))
 157
 158 (defun collection-to-contents (collection &optional (heading-level 1) (used-anchors (make-hash-table :test 'equal)))
 159   (alist-bind ((title (or string null)))
 160               collection
 161               (let ((subcollections (cdr
 162                                      (find-if (lambda (x) (member (car x) '(:books :sequences :chapters) :test #'eq))
 163                                               collection)))
 164                     contents-head contents-tail)
 165                 (labels ((add-contents (c)
 166                            (when c
 167                              (if contents-head
 168                                  (setf (cdr contents-tail) c)
 169                                  (setf contents-head c))
 170                              (setf contents-tail (last c)))))
 171                   (cond
 172                     ((and title (not (cdr (assoc :books collection))))
 173                      (add-contents (list (list heading-level title (title-to-anchor title used-anchors))))
 174                      (dolist (subcollection subcollections)
 175                        (add-contents (collection-to-contents subcollection (1+ heading-level) used-anchors))))
 176                     (:otherwise
 177                      (dolist (subcollection subcollections)
 178                        (add-contents (collection-to-contents subcollection heading-level used-anchors)))))
 179                   contents-head))))
 180
 181 (defun collection-to-html (collection &optional (heading-level 1) (used-anchors (make-hash-table :test 'equal)))
 182   (alist-bind ((title (or string null))
 183                (subtitle (or string null))
 184                (number (or fixnum null))
 185                (contents list)
 186                (posts list))
 187               collection
 188               (let* ((subcollections (cdr
 189                                       (find-if (lambda (x) (member (car x) '(:books :sequences :chapters) :test #'eq))
 190                                                collection)))
 191                      (html-body (cdr (assoc :html contents))))
 192                 (cond
 193                   ((or html-body title posts)
 194                    <section>
 195                      (when (or html-body title)
 196                        <div class="body-text sequence-text">
 197                          (when title
 198                            (with-html-stream-output (:stream stream)
 199                              (format stream "<h~A id=\"~A\" class=\"sequence-chapter\">~@[~A. ~]~A</h~A>"
 200                                      heading-level
 201                                      (title-to-anchor title used-anchors)
 202                                      number
 203                                      (clean-text-to-html title)
 204                                      heading-level)))
 205                          (when subtitle
 206                            <div class="sequence-subtitle">(safe (clean-text-to-html subtitle))</div>)
 207                          (when html-body
 208                            (with-html-stream-output (:stream stream)
 209                              (let ((*memoized-output-stream* stream)) (clean-html* html-body))))
 210                          </div>)
 211                      (if posts
 212                          (dolist (post posts)
 213                            (post-headline-to-html post))
 214                          (dolist (subcollection subcollections)
 215                            (collection-to-html subcollection (1+ heading-level) used-anchors)))
 216                    </section>)
 217                   (:otherwise
 218                    (dolist (subcollection subcollections)
 219                      (collection-to-html subcollection heading-level used-anchors)))))))
 220
 221 (defun sequence-to-html (sequence)
 222   (labels ((contents-to-html (contents &key title subtitle number)
 223              (let ((html-body (cdr (assoc :html contents))))
 224                (when (or html-body title subtitle)
 225                  <div class="body-text sequence-text">
 226                    (when title
 227                      <h1 class="sequence-chapter">(safe (format nil "~@[~A. ~]~A" number (clean-text-to-html title :hyphenation nil)))</h1>)
 228                    (when subtitle
 229                      <div class="sequence-subtitle">(clean-text-to-html subtitle)</div>)
 230                    (with-html-stream-output (:stream stream)
 231                      (when html-body
 232                        (let ((*memoized-output-stream* stream)) (clean-html* html-body))))
 233                  </div>)))
 234            (chapter-to-html (chapter)
 235              (alist-bind ((title (or string null))
 236                            (subtitle (or string null))
 237                            (number (or fixnum null))
 238                            (contents list)
 239                            (posts list))
 240                          chapter
 241                 <section>
 242                   (with-html-stream-output
 243                     (contents-to-html contents :title title :subtitle subtitle :number number)
 244                     <section>
 245                       (with-html-stream-output
 246                           (dolist (post posts)
 247                             (post-headline-to-html post)))
 248                     </section>)
 249                 </section>)))
 250   (alist-bind ((sequence-id string :--id)
 251                (title string)
 252                (created-at string)
 253                (user-id string)
 254                (chapters list)
 255                (contents list))
 256               sequence
 257     (multiple-value-bind (pretty-time js-time) (pretty-time created-at)
 258       <article>
 259         (if chapters
 260           <h1 class="post-title">(safe (clean-text-to-html title :hyphenation nil))</h1>
 261           <h1 class="listing"><a href=("/s/~A" sequence-id)>(safe (clean-text-to-html title :hyphenation nil))</a></h1>)
 262         <div class="post-meta">
 263           <a class=("author~{ ~A~}" (list-cond ((logged-in-userid user-id) "own-user-author")))
 264              href=("/users/~A" (get-user-slug user-id))
 265              data-userid=user-id>
 266             (get-username user-id)
 267           </a>
 268           <div class="date" data-js-date=js-time>
 269             (safe pretty-time)
 270             (safe (pretty-time-js))
 271           </div>
 272         </div>
 273         (with-html-stream-output
 274             (when chapters
 275               (contents-to-html contents)
 276               (dolist (chapter chapters)
 277                 (chapter-to-html chapter))))
 278       </article>))))
 279
 280 (defun abort-response ()
 281   (throw 'abort-response nil))
 282
 283 (defun abort-response-if-unrecoverable (condition)
 284   (when (html-output-stream-error-p condition)
 285     (abort-response)))
 286
 287 (defmacro with-error-html-block (() &body body)
 288   "If an error occurs within BODY, write an HTML representation of the
 289 signaled condition to *HTML-OUTPUT*."
 290   `(block with-error-html-block
 291      (handler-bind ((serious-condition (lambda (c)
 292                                          (abort-response-if-unrecoverable c)
 293                                          (error-to-html c)
 294                                          (return-from with-error-html-block nil))))
 295        (log-conditions (progn ,@body)))))
 296
 297 (defun make-comment-parent-hash (comments)
 298   (let ((existing-comment-hash (make-hash-table :test 'equal))
 299         (hash (make-hash-table :test 'equal)))
 300     (dolist (c comments)
 301       (if-let (id (cdr (assoc :--id c)))
 302               (setf (gethash id existing-comment-hash) t)))
 303     (dolist (c comments)
 304       (let* ((parent-id (cdr (assoc :parent-comment-id c)))
 305              (old (gethash parent-id hash)))
 306         (setf (gethash parent-id hash) (cons c old))
 307         (when (and parent-id (not (gethash parent-id existing-comment-hash)))
 308           (let ((placeholder (alist :--id parent-id :parent-comment-id nil :deleted t)))
 309             (setf (gethash parent-id existing-comment-hash) t
 310                   (gethash nil hash) (cons placeholder (gethash nil hash)))))))
 311     (maphash (lambda (k old)
 312                (setf (gethash k hash) (nreverse old)))
 313              hash)
 314     (labels
 315       ((count-children (parent)
 316         (let ((children (gethash (cdr (assoc :--id parent)) hash)))
 317           (+ (length children) (apply #'+ (map 'list #'count-children children)))))
 318        (add-child-counts (comment-list)
 319         (loop for c in comment-list
 320               as id = (cdr (assoc :--id c))
 321               do (setf (gethash id hash) (add-child-counts (gethash id hash)))
 322               collecting (cons (cons :child-count (count-children c)) c))))
 323       (setf (gethash nil hash) (add-child-counts (gethash nil hash))))
 324     hash))
 325
 326 (defun comment-thread-to-html (out-stream emit-comment-item-fn)
 327   (format out-stream "<ul class=\"comment-thread\">")
 328   (funcall emit-comment-item-fn)
 329   (format out-stream "</ul>"))
 330
 331 (defun comment-item-to-html (out-stream comment &key extra-html-fn with-post-title level level-invert)
 332   (with-error-html-block ()
 333     (let ((c-id (cdr (assoc :--id comment)))
 334           (user-id (cdr (assoc :user-id comment))))
 335       (format out-stream "<li id=\"comment-~A\" class=\"comment-item~{ ~A~}\">"
 336               c-id
 337               (list-cond
 338                (t (if (let ((is-odd (or (not level) (evenp level)))) ;inverted because level counts from 0
 339                         (if level-invert (not is-odd) is-odd))
 340                       "depth-odd" "depth-even"))
 341                ((and *current-ignore-hash* (gethash user-id *current-ignore-hash*)) "ignored")))
 342       (unwind-protect
 343         (comment-to-html out-stream comment :with-post-title with-post-title)
 344         (if extra-html-fn (funcall extra-html-fn c-id))
 345         (format out-stream "</li>")))))
 346
 347 (defun comment-tree-to-html (out-stream comment-hash &key (target nil) (level (if target 1 0)) level-invert)
 348   (let ((comments (gethash target comment-hash)))
 349     (when comments
 350       (comment-thread-to-html out-stream
 351         (lambda ()
 352           (loop for c in comments do
 353                (comment-item-to-html out-stream c
 354                  :level level
 355                  :level-invert level-invert
 356                  :extra-html-fn (lambda (c-id)
 357                                   (if (and (= level 10) (gethash c-id comment-hash))
 358                                       (format out-stream "<input type=\"checkbox\" id=\"expand-~A\"><label for=\"expand-~:*~A\" data-child-count=\"~A comment~:P\">Expand this thread</label>"
 359                                               c-id
 360                                               (cdr (assoc :child-count c))))
 361                                   (comment-tree-to-html out-stream comment-hash :target c-id :level (1+ level) :level-invert level-invert)))))))))
 362
 363 (defun sort-items (items sort-by)
 364   (multiple-value-bind (sort-fn key-fn)
 365       (ecase sort-by
 366         ((:old :new) (values (if (eq sort-by :old)
 367                                  (lambda (a b) (ignore-errors (local-time:timestamp< a b)))
 368                                  (lambda (a b) (ignore-errors (local-time:timestamp> a b))))
 369                              (lambda (c) (ignore-errors (local-time:parse-timestring (or (cdr (assoc :posted-at c))
 370                                                                                          (cdr (assoc :created-at c)))))))))
 371     (sort items sort-fn :key key-fn)))
 372
 373 (defun comment-chrono-to-html (out-stream comments)
 374   (let ((comment-hash (make-comment-parent-hash comments))
 375         (comments (sort-items comments :old)))
 376     (comment-thread-to-html out-stream
 377       (lambda ()
 378         (loop for c in comments do
 379               (let* ((c-id (cdr (assoc :--id c)))
 380                      (new-c (acons :children (gethash c-id comment-hash) c)))
 381                 (comment-item-to-html out-stream new-c)))))))
 382
 383 (defun comment-post-interleave (list &key limit offset (sort-by :date))
 384   (multiple-value-bind (sort-fn sort-key)
 385     (ecase sort-by
 386       (:date (values #'local-time:timestamp> (lambda (x) (local-time:parse-timestring (cdr (assoc :posted-at x))))))
 387       (:date-reverse (values #'local-time:timestamp< (lambda (x) (local-time:parse-timestring (cdr (assoc :posted-at x))))))
 388       (:score (values #'> (lambda (x) (cdr (assoc :base-score x))))))
 389     (let ((sorted (sort list sort-fn :key sort-key)))
 390       (loop for end = (if (or limit offset) (+ (or limit 0) (or offset 0)))
 391             for x in sorted
 392             for count from 0
 393             until (and end (>= count end))
 394             when (or (not offset) (>= count offset))
 395             collect x))))
 396
 397 (defun identify-item (x)
 398   (typecase x
 399     (cons
 400      (if-let (typename (cdr (assoc :----typename x)))
 401              (find-symbol (string-upcase typename) (find-package :keyword))
 402              (cond
 403                ((assoc :message x)
 404                 :notification)
 405                ((assoc :comment-count x)
 406                 :post)
 407                (t
 408                 :comment))))
 409     (condition :condition)))
 410
 411 (defun write-index-items-to-html (out-stream items &key need-auth (empty-message "No entries.") skip-section)
 412   (if items
 413       (dolist (x items)
 414         (with-error-html-block ()
 415           (ecase (identify-item x)
 416             (:condition
 417              (error-to-html x))
 418             (:notification
 419              (format out-stream "<p>~A</p>" (cdr (assoc :message x))))
 420             (:message
 421              (format out-stream "<ul class=\"comment-thread\"><li class=\"comment-item depth-odd\">")
 422              (unwind-protect
 423                   (conversation-message-to-html out-stream x)
 424                (format out-stream "</li></ul>")))
 425             (:conversation
 426              (conversation-index-to-html out-stream x))
 427             (:post
 428              (post-headline-to-html x :need-auth (or need-auth (cdr (assoc :draft x))) :skip-section skip-section))
 429             (:comment
 430              (comment-thread-to-html out-stream
 431                                      (lambda () (comment-item-to-html out-stream x :with-post-title t))))
 432             (:sequence
 433              (sequence-to-html x)))))
 434       (format out-stream "<div class=\"listing-message\">~A</div>" empty-message)))
 435
 436 (defun write-index-items-to-rss (out-stream items &key title need-auth)
 437   (let ((full-title (format nil "~@[~A - ~]~A" title (site-title *current-site*)))
 438         (items (firstn (sort-items items :new) 20)))
 439     (xml-emitter:with-rss2 (out-stream :encoding "UTF-8")
 440       (xml-emitter:rss-channel-header full-title (site-uri *current-site*) :description full-title)
 441       (labels ((emit-item (item &key title link (guid (cdr (assoc :--id item))) (author (get-username (cdr (assoc :user-id item))))
 442                                 (date (pretty-time (cdr (assoc :posted-at item)) :format local-time:+rfc-1123-format+)) body)
 443                           (xml-emitter:rss-item
 444                             title
 445                             :link link
 446                             :author author
 447                             :pubDate date
 448                             :guid guid
 449                             :description body)))
 450         (dolist (item items)
 451           (ecase (identify-item item)
 452             (:post
 453              (let ((author (get-username (cdr (assoc :user-id item))))
 454                    (is-event (cdr (assoc :is-event item))))
 455                (emit-item item
 456                           :title (clean-text (format nil "~A by ~A" (cdr (assoc :title item)) author))
 457                           :author author
 458                           :link (generate-post-auth-link item :absolute t :need-auth need-auth :item-subtype (if is-event "event" "post"))
 459                           :body (clean-html (or (cdr (assoc :html-body (get-post-body (cdr (assoc :--id item)) :revalidate nil))) "") :post-id (cdr (assoc :--id item))))))
 460             (:comment
 461              (schema-bind (:comment item (comment-id post-id user-id html-body))
 462                (when post-id ; XXX fixme
 463                  (emit-item item
 464                             :title (format nil "Comment by ~A on ~A" (get-username user-id) (get-post-title post-id))
 465                             :link (generate-item-link :post post-id :comment-id comment-id :absolute t)
 466                             :body (clean-html html-body)))))))))))
 467
 468 (defun search-bar-to-html (out-stream)
 469   (declare (special *current-search-query*))
 470   (let ((query (and (boundp '*current-search-query*) (hunchentoot:escape-for-html *current-search-query*))))
 471     (format out-stream "<form action=\"/search\" class=\"nav-inner\"><input name=\"q\" type=\"search\" ~@[value=\"~A\"~] autocomplete=\"off\" accesskey=\"s\" title=\"Search [s]~@[&#10;Tip: Paste a ~A URL here to jump to that page.~]\"><button>Search</button></form>" query (main-site-title *current-site*))))
 472
 473 (defun inbox-to-html (out-stream user-slug &optional new-messages)
 474   (let* ((target-uri (format nil "/users/~A?show=inbox" user-slug))
 475          (as-link (string= (hunchentoot:request-uri*) target-uri)))
 476     (multiple-value-bind (nm-class nm-text)
 477       (if new-messages (values "new-messages" "New messages") (values "no-messages" "Inbox"))
 478       (format out-stream "<~:[a href=\"~A\"~;span~*~] id=\"inbox-indicator\" class=\"~A\" accesskey=\"o\" title=\"~A~:[ [o]~;~]\">~A</a>"
 479               as-link target-uri nm-class nm-text as-link nm-text))))
 480
 481 (defmethod site-nav-bars ((site site))
 482   '((:secondary-bar (("archive" "/archive" "Archive" :accesskey "r")
 483                      ("about" "/about" "About" :accesskey "t")
 484                      ("search" "/search" "Search" :html search-bar-to-html)
 485                      user-nav-item))
 486     (:primary-bar (("home" "/" "Home" :description "Latest frontpage posts" :accesskey "h")
 487                    ("recent-comments" "/recentcomments" "<span>Recent </span>Comments" :description "Latest comments" :accesskey "c")))))
 488
 489 (defmethod site-nav-bars ((site lesswrong-viewer-site))
 490   '((:secondary-bar (("archive" "/archive" "Archive" :accesskey "r")
 491                      ("sequences" "/library" "Sequences" :description "Sequences" :accesskey "q")
 492                      ("about" "/about" "About" :accesskey "t")
 493                      ("search" "/search" "Search" :html search-bar-to-html)
 494                      user-nav-item))
 495     (:tertiary-bar (("questions" "/index?view=questions" "Questions")
 496                     ("events" "/index?view=events" "Events")
 497                     ("shortform" "/shortform" "Shortform" :description "Latest Shortform posts")
 498                     ("alignment-forum" "/index?view=alignment-forum" "Alignment Forum")
 499                     ("alignment-forum-comments" "/recentcomments?view=alignment-forum" "AF Comments")))
 500     (:primary-bar (("home" "/" "Home" :description "Latest frontpage posts" :accesskey "h")
 501                    ("featured" "/index?view=featured" "Featured" :description "Latest featured posts" :accesskey "f")
 502                    ("all" "/index?view=all" "All" :description "Latest posts from all sections" :accesskey "a")
 503                    ("tags" "/tags" "Tags" :description "All tags" :accesskey "v")
 504                    ("recent-comments" "/recentcomments" "<span>Recent </span>Comments" :description "Latest comments" :accesskey "c")))))
 505
 506 (defmethod site-nav-bars ((site ea-forum-viewer-site))
 507   '((:secondary-bar (("archive" "/archive" "Archive" :accesskey "r")
 508                      ("about" "/about" "About" :accesskey "t")
 509                      ("search" "/search" "Search" :html search-bar-to-html)
 510                      user-nav-item))
 511     (:primary-bar (("home" "/" "Home" :description "Latest frontpage posts" :accesskey "h")
 512                    ("all" "/index?view=all" "All" :description "Latest posts from all sections" :accesskey "a")
 513                    ("tags" "/tags" "Wiki" :description "Wiki pages and tags" :accesskey "v")
 514                    ("shortform" "/shortform" "Shortform" :description "Latest Shortform posts")
 515                    ("recent-comments" "/recentcomments" "<span>Recent </span>Comments" :description "Latest comments" :accesskey "c")))))
 516
 517 (defun prepare-nav-bar (nav-bar current-uri)
 518   (list (first nav-bar)
 519         (map 'list (lambda (item) (if (listp item) item (funcall item current-uri)))
 520              (second nav-bar))))
 521
 522 (defun nav-item-active (item current-uri)
 523   (when item
 524     (destructuring-bind (id uri name &key description html accesskey nofollow trailing-html override-uri) item
 525       (declare (ignore id name description html accesskey nofollow trailing-html))
 526       (string= (or override-uri uri) current-uri))))
 527
 528 (defun nav-bar-active (nav-bar current-uri)
 529   (some (lambda (x) (nav-item-active x current-uri)) (second nav-bar)))
 530
 531 (defun nav-bar-inner (out-stream items &optional current-uri)
 532   (maplist (lambda (items)
 533              (let ((item (first items)))
 534                (destructuring-bind (id uri name &key description html accesskey nofollow trailing-html override-uri) item
 535                  (declare (ignore override-uri))
 536                  (let* ((item-active (nav-item-active item current-uri))
 537                         (nav-class (format nil "nav-item ~:[nav-inactive~;nav-current~]~:[~; nav-item-last-before-current~]"
 538                                            item-active (and (not item-active) (nav-item-active (cadr items) current-uri)))))
 539                      (format out-stream "<span id=\"nav-item-~A\" class=\"~A\" ~@[title=\"~A\"~]>"
 540                              id nav-class description)
 541                      (if html
 542                          (funcall html out-stream)
 543                          (link-if-not out-stream item-active uri "nav-inner" name :accesskey accesskey :nofollow nofollow))
 544                      (if trailing-html
 545                          (funcall trailing-html out-stream))
 546                      (format out-stream "</span>")))))
 547            items))
 548
 549 (defun nav-bar-outer (out-stream class nav-bar &optional current-uri)
 550   (format out-stream "<nav id=\"~A\" class=\"nav-bar~@[ ~A~]\">" (string-downcase (first nav-bar)) class)
 551   (nav-bar-inner out-stream (second nav-bar) current-uri)
 552   (format out-stream "</nav>"))
 553
 554 (defun nav-bar-to-html (out-stream class current-uri)
 555   (let* ((nav-bars (map 'list (lambda (x) (prepare-nav-bar x current-uri)) (site-nav-bars *current-site*)))
 556          (active-bar (or (find-if (lambda (x) (nav-bar-active x current-uri)) nav-bars) (car (last nav-bars))))
 557          (inactive-bars (remove active-bar nav-bars)))
 558     (dolist (bar inactive-bars)
 559       (nav-bar-outer out-stream (format nil "~@[~A ~]inactive-bar" class) bar current-uri))
 560     (nav-bar-outer out-stream (format nil "~@[~A ~]active-bar" class) active-bar current-uri)))
 561
 562 (defun user-nav-item (&optional current-uri)
 563   (if *read-only-mode*
 564       `("login" "/login" "Read Only Mode" :html ,(lambda (out-stream)
 565                                                          (format out-stream "<span class=\"nav-inner\" title=\"~A\">[Read Only Mode]</span>"
 566                                                                  (typecase *read-only-mode*
 567                                                                    (string *read-only-mode*)
 568                                                                    (t *read-only-default-message*)))))
 569       (if-let (username (logged-in-username))
 570               (let ((user-slug (encode-entities (logged-in-user-slug))))
 571                 `("login" ,(format nil "/users/~A" user-slug) ,(plump:encode-entities username) :description "User page" :accesskey "u"
 572                           :trailing-html ,(lambda (out-stream) (inbox-to-html out-stream user-slug))))
 573               `("login" "/login" "Log In"
 574                         :html ,(lambda (out-stream)
 575                                  (write-string "<form action='/login' id='login-button-form'><input type='hidden' name='return' value='" out-stream)
 576                                  (encode-entities current-uri out-stream)
 577                                  (write-string "'></form><button class='nav-inner' form='login-button-form' accesskey='u'>Log In</button>" out-stream))))))
 578
 579 (defun sublevel-nav-to-html (options current &key default (base-uri (hunchentoot:request-uri*)) (param-name "show") (remove-params '("offset")) extra-class)
 580   (declare (type (or null string) extra-class))
 581   (let ((out-stream *html-output*))
 582     (format out-stream "<nav class=\"sublevel-nav~@[ ~A~]\">" extra-class)
 583     (loop for item in options
 584        do (destructuring-bind (param-value &key (text (string-capitalize param-value)) description) (if (atom item) (list item) item)
 585             (let* ((param-value (string-downcase param-value))
 586                    (selected (string-equal current param-value))
 587                    (class (if selected "sublevel-item selected" "sublevel-item")))
 588               (link-if-not out-stream selected (apply #'replace-query-params base-uri param-name (unless (string-equal param-value default) param-value)
 589                                                       (loop for x in remove-params nconc (list x nil)))
 590                            class text :title description))))
 591     (format out-stream "</nav>")))
 592
 593 (defmacro set-script-variables (&rest clauses)
 594   (with-gensyms (out-stream name value)
 595     `(with-html-stream-output (:stream ,out-stream)
 596        ,.(loop for clause in clauses
 597             collect (destructuring-bind (name-form value-form) clause
 598                       `(let ((,name ,name-form)
 599                              (,value ,value-form))
 600                          (declare (dynamic-extent ,name ,value))
 601                          (write-string ,name ,out-stream)
 602                          (write-string "=" ,out-stream)
 603                          (json:encode-json ,value ,out-stream)
 604                          (write-string #.(format nil ";~%") ,out-stream)))))))
 605
 606 (defun html-body (out-stream fn &key title description social-description current-uri content-class robots extra-head)
 607   (macrolet ((for-resource-type ((resource-type &rest args) &body body)
 608                (with-gensyms (resource)
 609                  `(dolist (,resource page-resources)
 610                     (when (eq (first ,resource) ,resource-type)
 611                       (destructuring-bind ,args (rest ,resource)
 612                         ,@body))))))
 613     (with-html-stream-output
 614         (let* ((session-token (hunchentoot:cookie-in "session-token"))
 615                (csrf-token (and session-token (make-csrf-token session-token)))
 616                (hide-nav-bars (truthy-string-p (hunchentoot:get-parameter "hide-nav-bars")))
 617                (preview *preview*)
 618                (page-resources (nreverse *page-resources*))
 619                (site-domain (site-domain *current-site*)))
 620           (setf *page-resources* nil)
 621           (write-string "<!DOCTYPE html><html lang=\"en-US\"><head>
 622 <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">
 623 <meta name=\"HandheldFriendly\" content=\"True\" />"
 624                         out-stream)
 625           (with-delimited-writer (out-stream delimit :begin "<script>" :end "</script>")
 626             (when site-domain
 627               (delimit)
 628               (set-script-variables ("document.domain" site-domain))) ; Requires origin-agent-cluster header, see below
 629             (unless preview
 630               (delimit)
 631               (when (typep *current-site* 'login-site)
 632                 (set-script-variables
 633                  ("loggedInUserId" (or (logged-in-userid) ""))
 634                  ("loggedInUserDisplayName" (or (logged-in-username) ""))
 635                  ("loggedInUserSlug" (or (logged-in-user-slug) ""))))
 636               (set-script-variables
 637                ("applicationServerKey" (get-vapid-public-key))
 638                ("GW" (alist "useFancyFeatures" (not (typep *current-site* 'arbital-site))
 639                             "secureCookies" (to-boolean (site-secure *current-site*))
 640                             "csrfToken" csrf-token
 641                             "assets" (alist "popup.svg" (generate-versioned-link "/assets/popup.svg"))
 642                             "sites" (if site-domain
 643                                         (loop for site in *sites*
 644                                            when (let ((sd (site-domain site))) (and sd (string-equal sd site-domain)))
 645                                            collect (cons (site-host site) t))
 646                                         (alist (site-host *current-site*) t)))))
 647               (for-resource-type (:inline-script script-text)
 648                                  (write-string ";" out-stream)
 649                                  (write-string script-text out-stream))))
 650           (unless preview
 651             (funcall lw2.resources::*script-tags* out-stream)
 652             (for-resource-type (:script uri)
 653                                (format out-stream "<script src=\"~A\"></script>" uri))
 654             (funcall lw2.resources::*async-script-tags* out-stream)
 655             (for-resource-type (:async-script uri)
 656                                (format out-stream "<script src=\"~A\" async></script>" uri)))
 657           (funcall lw2.resources::*style-tags* out-stream)
 658           (for-resource-type (:stylesheet uri &key media class)
 659                              (format out-stream "<link rel=\"stylesheet\" href=\"~A\"~@[ media=\"~A\"~]~@[ class=\"~A\"~]>" uri media class))
 660           (generate-fonts-html-headers (site-fonts-source *current-site*))
 661           (format out-stream "<link rel=\"shortcut icon\" href=\"~A\">"
 662                   (generate-versioned-link "/assets/favicon.ico"))
 663           (format out-stream "<title>~@[~A - ~]~A</title>~@[<meta name=\"description\" content=\"~A\">~]~@[<meta name=\"robots\" content=\"~A\">~]"
 664                   (if title (encode-entities title))
 665                   (site-title *current-site*)
 666                   description
 667                   robots)
 668           (unless preview
 669             (when title
 670               <meta property="og:title" content=title>)
 671             (when social-description
 672               <meta property="og:description" content=social-description>
 673               <meta property="og:type" content="article">))
 674           (with-delimited-writer (out-stream delimit :begin "<style>" :between #.(format nil "~%") :end "</style>")
 675             (unless (and (typep *current-site* 'login-site) (logged-in-userid))
 676               (delimit)
 677               (write-string "button.vote { display: none }" out-stream))
 678             (when *memoized-output-without-hyphens*
 679               ;; The browser has been detected as having bugs related to soft-hyphen characters.
 680               ;; But there is some hope that it could still do hyphenation by itself.
 681               (delimit)
 682               (write-string ".body-text { hyphens: auto; -ms-hyphens: auto; -webkit-hyphens: auto; }" out-stream)))
 683           (when preview
 684             (format out-stream "<base target='_top'>"))
 685           (when extra-head (funcall extra-head))
 686           (format out-stream "</head>")
 687           (unwind-protect
 688                (progn
 689                  (format out-stream "<body class=\"theme-~A\"><div id=\"content\"~@[ class=\"~{~A~^ ~}\"~]>"
 690                          (let ((theme (hunchentoot:cookie-in "theme")))
 691                            (if (and theme (> (length theme) 0))
 692                                theme
 693                                "default"))
 694                          (list-cond (content-class content-class)
 695                                     (hide-nav-bars "no-nav-bars")
 696                                     (preview "preview")))
 697                  (unless (or hide-nav-bars preview)
 698                    (nav-bar-to-html out-stream "nav-bar-top" (or current-uri (replace-query-params (hunchentoot:request-uri*) "offset" nil "sort" nil)))
 699                    (when (and (typep *current-site* 'login-site) (logged-in-userid))
 700                      (call-with-server-data 'process-user-status "/current-user-status")))
 701                  (activate-client-trigger "navBarLoaded")
 702                  (funcall fn))
 703             (format out-stream "</div></body></html>"))))))
 704
 705 (defun replace-query-params (uri &rest params)
 706   (let* ((quri (quri:uri uri))
 707          (old-params (quri:uri-query-params quri))
 708          (new-params (loop with out = old-params
 709                            for (param value) on params by #'cddr
 710                            do (if value
 711                                   (if-let (old-cons (assoc param out :test #'equal))
 712                                           (setf (cdr old-cons) value)
 713                                           (setf out (nconc out (list (cons param value)))))
 714                                   (setf out (remove-if (lambda (x) (equal (car x) param)) out)))
 715                            finally (return out))))
 716     (if new-params
 717       (setf (quri:uri-query-params quri) new-params)
 718       (setf (quri:uri-query quri) nil))
 719     (quri:render-uri quri)))
 720
 721 (defun pagination-nav-bars (&key offset total with-next (items-per-page (user-pref :items-per-page)))
 722   (if *preview*
 723       (lambda (out-stream fn)
 724         (declare (ignore out-stream))
 725         (funcall fn))
 726       (lambda (out-stream fn)
 727         (labels ((pages-to-end (n) (< (+ offset (* items-per-page n)) total)))
 728           (let* ((with-next (if total (pages-to-end 1) with-next))
 729                  (next (if (and offset with-next) (+ offset items-per-page)))
 730                  (prev (if (and offset (>= offset items-per-page)) (- offset items-per-page)))
 731                  (request-uri (hunchentoot:request-uri*))
 732                  (first-uri (if (and prev (> prev 0)) (replace-query-params request-uri "offset" nil)))
 733                  (prev-uri (if prev (replace-query-params request-uri "offset" (if (= prev 0) nil prev))))
 734                  (next-uri (if next (replace-query-params request-uri "offset" next)))
 735                  (last-uri (if (and total offset (pages-to-end 2))
 736                                (replace-query-params request-uri "offset" (- total (mod (- total 1) items-per-page) 1)))))
 737             (if (or next prev last-uri)
 738                 (labels ((write-item (uri class title accesskey)
 739                            (format out-stream "<a href=\"~A\" class=\"button nav-item-~A~:[ disabled~;~]\" title=\"~A [~A]\" accesskey=\"~A\"></a>"
 740                                    (or uri "#") class uri title accesskey accesskey)))
 741                   (format out-stream "<nav id='top-nav-bar'>")
 742                   (write-item first-uri "first" "First page" "\\")
 743                   (write-item prev-uri "prev" "Previous page" "[")
 744                   (format out-stream "<span class='page-number'><span class='page-number-label'>Page</span> ~A</span>" (+ 1 (/ (or offset 0) items-per-page)))
 745                   (write-item next-uri "next" "Next page" "]")
 746                   (write-item last-uri "last" "Last page" "/")
 747                   (format out-stream "</nav>")))
 748             (funcall fn)
 749             (nav-bar-outer out-stream nil (list :bottom-bar
 750                                                 (list-cond
 751                                                  (first-uri `("first" ,first-uri "Back to first"))
 752                                                  (prev-uri `("prev" ,prev-uri "Previous" :nofollow t))
 753                                                  (t `("top" "#top" "Back to top"))
 754                                                  (next-uri `("next" ,next-uri "Next" :nofollow t))
 755                                                  (last-uri `("last" ,last-uri "Last" :nofollow t)))))
 756             (format out-stream "<script>document.querySelectorAll('#bottom-bar').forEach(bb => { bb.classList.add('decorative'); });</script>"))))))
 757
 758 (defun decode-json-as-hash-table (json-source)
 759   (let (current-hash-table current-key)
 760     (declare (special current-hash-table current-key))
 761     (json:bind-custom-vars
 762      (:beginning-of-object (lambda () (setf current-hash-table (make-hash-table :test 'equal)))
 763       :object-key (lambda (x) (setf current-key x))
 764       :object-value (lambda (x) (setf (gethash current-key current-hash-table) x))
 765       :end-of-object (lambda () current-hash-table)
 766       :aggregate-scope '(current-hash-table current-key))
 767      (json:decode-json-from-source json-source))))
 768
 769 (defun get-ignore-hash (&optional (user-id (logged-in-userid)))
 770   (if-let (ignore-json (and user-id (cache-get "user-ignore-list" user-id)))
 771           (decode-json-as-hash-table ignore-json)
 772           (make-hash-table :test 'equal)))
 773
 774 (defmacro with-outputs ((out-stream) &body body)
 775   (with-gensyms (stream-sym)
 776     (let ((out-body (map 'list (lambda (x) `(princ ,x ,stream-sym)) body)))
 777       `(let ((,stream-sym ,out-stream))
 778          ,.out-body))))
 779
 780 (defun call-with-emit-page (out-stream fn &key title description social-description current-uri content-class (return-code 200) robots (pagination (pagination-nav-bars)) top-nav extra-head)
 781   (declare (ignore return-code))
 782   (ignore-errors
 783     (log-conditions
 784       (html-body out-stream
 785                  (lambda ()
 786                    (when top-nav (funcall top-nav))
 787                    (funcall pagination out-stream fn))
 788                  :title title :description description :social-description social-description :current-uri current-uri :content-class content-class :robots robots :extra-head extra-head))))
 789
 790 (defun set-cookie (key value &key (max-age (- (expt 2 31) 1)) (path "/"))
 791   (hunchentoot:set-cookie key :value value :path path :max-age max-age :secure (site-secure *current-site*)))
 792
 793 (defun set-default-headers (return-code)
 794   (setf (hunchentoot:content-type*) "text/html; charset=utf-8"
 795         (hunchentoot:return-code*) return-code
 796         (hunchentoot:header-out :link) (let ((output
 797                                               (with-output-to-string (stream)
 798                                                 (with-delimited-writer (stream delimit :between ",")
 799                                                   (funcall lw2.resources::*link-header* stream delimit)))))
 800                                          (when (> (length output) 0)
 801                                            output)))
 802   (unless lw2.resources::*push-option* (set-cookie "push" "t" :max-age (* 4 60 60))))
 803
 804 (defun user-pref (key)
 805   (or (cdr (assoc key *current-prefs*))
 806       (cdr (assoc key *default-prefs*))))
 807
 808 (defun set-user-pref (key value)
 809   (assert (boundp 'hunchentoot:*reply*))
 810   (if value
 811       (setf *current-prefs* (remove-duplicates (acons key value *current-prefs*) :key #'car :from-end t))
 812       (setf *current-prefs* (remove key *current-prefs* :key #'car)))
 813   (set-cookie "prefs" (quri:url-encode (json:encode-json-to-string *current-prefs*))))
 814
 815 (defmacro emit-page ((out-stream &rest args &key (return-code 200) &allow-other-keys) &body body)
 816   (once-only (return-code)
 817     `(progn
 818        (set-default-headers ,return-code)
 819        (with-response-stream (,out-stream)
 820          (dynamic-flet ((fn () ,@body))
 821            (call-with-emit-page ,out-stream
 822                                 #'fn
 823                                 ,@args))))))
 824
 825 (defmethod call-with-backend-context ((backend backend-token-login) (request (eql t)) fn)
 826   (let ((*current-auth-status* (safe-decode-json (hunchentoot:cookie-in "lw2-status"))))
 827     (multiple-value-bind (*current-auth-token* *current-userid* *current-username*)
 828         (let* ((auth-token (hunchentoot:cookie-in "lw2-auth-token"))
 829                (expires (cdr (assoc :expires *current-auth-status*))))
 830           (when (and (nonempty-string auth-token)
 831                      (not *read-only-mode*)
 832                      (or (null expires)
 833                          (and (integerp expires) (<= (get-unix-time) (- expires (* 60 60 24))))))
 834             (with-cache-readonly-transaction
 835                 (values
 836                  auth-token
 837                  (cache-get "auth-token-to-userid" auth-token)
 838                  (cache-get "auth-token-to-username" auth-token)))))
 839       (let ((*current-user-slug* (and *current-userid* (get-user-slug *current-userid*))))
 840         (funcall fn)))))
 841
 842 (defmethod call-with-site-context ((site ignore-list-site) (request (eql t)) fn)
 843   (call-next-method
 844    site request
 845    (lambda ()
 846      (let ((*current-ignore-hash* (get-ignore-hash)))
 847        (funcall fn)))))
 848
 849 (defun call-with-error-page (fn)
 850   (with-response-context ()
 851     (let* ((*current-prefs* (safe-decode-json (hunchentoot:cookie-in "prefs")))
 852            (*preview* (string-equal (hunchentoot:get-parameter "format") "preview")))
 853       (multiple-value-bind (*revalidate-default* *force-revalidate-default*)
 854           (cond ((ppcre:scan "(?:^|,?)\\s*(?:no-cache|max-age=0)(?:$|,)" (hunchentoot:header-in* :cache-control))
 855                  (values t t))
 856                 (*preview*
 857                  (values nil nil))
 858                 (t
 859                  (values t nil)))
 860         (when (not *revalidate-default*)
 861           (setf (hunchentoot:header-out :cache-control) (format nil "public, max-age=~A" (* 5 60))))
 862         (when (site-domain *current-site*)
 863           (setf (hunchentoot:header-out :origin-agent-cluster) "?0")) ; Allow document.domain in Chrome: https://developer.chrome.com/blog/immutable-document-domain/
 864         (let ((*memoized-output-without-hyphens*
 865                ;; Soft hyphen characters mess up middle-click paste and screen readers, so try to identify whether they are necessary.
 866                ;; See https://caniuse.com/?search=hyphens
 867                (if-let ((ua (hunchentoot:header-in* :user-agent)))
 868                        (regex-case ua
 869                                    (" Chrome/(\\d+)"
 870                                     (declare (regex-groups-min 1))
 871                                     (or (> (parse-integer (reg 0)) 87)
 872                                         (ppcre:scan "Macintosh|Android" ua)))
 873                                    (" Edge/(\\d+)"
 874                                     (declare (regex-groups-min 1))
 875                                     (> 19 (parse-integer (reg 0))))
 876                                    (t t))
 877                        t)))
 878           (with-page-resources
 879               (catch 'abort-response
 880                 (handler-bind
 881                     ((fatal-error (lambda (condition)
 882                                     (abort-response-if-unrecoverable condition)
 883                                     (let ((error-html (with-output-to-string (*html-output*) (error-to-html condition))))
 884                                       (emit-page (out-stream :title "Error" :return-code (condition-http-return-code condition) :content-class "error-page")
 885                                                  (write-string error-html out-stream)
 886                                                  (when (eq (hunchentoot:request-method*) :post)
 887                                                    <form method="post" class="error-retry-form">
 888                                                    (loop for (key . value) in (hunchentoot:post-parameters*)
 889                                                       do <input type="hidden" name=key value=value>)
 890                                                    <input type="submit" value="Retry">
 891                                                    </form>))
 892                                       (return-from call-with-error-page)))))
 893                   (log-conditions
 894                    (if (or (eq (hunchentoot:request-method*) :post)
 895                            (not (and (boundp '*test-acceptor*) (boundp '*hunchentoot-taskmaster*)))) ; TODO fix this hack
 896                        (funcall fn)
 897                        (sb-sys:with-deadline (:seconds (expt 1.3
 898                                                              (min (round (log 30 1.3))
 899                                                                   (- (hunchentoot:taskmaster-max-thread-count (symbol-value '*hunchentoot-taskmaster*))
 900                                                                      (hunchentoot:acceptor-requests-in-progress (symbol-value '*test-acceptor*))))))
 901                          (funcall fn))))))))))))
 902
 903 (defmacro with-error-page (&body body)
 904   `(dynamic-flet ((fn () ,@body)) (call-with-error-page #'fn)))
 905
 906 (defun output-form (out-stream method action id heading csrf-token fields button-label &key textarea end-html)
 907   (format out-stream "<form method=\"~A\" action=\"~A\" id=\"~A\"><h1>~A</h1>" method action id heading)
 908   (loop for (id label type . params) in fields
 909         do (format out-stream "<label for=\"~A\">~A:</label>" id label)
 910         do (cond
 911              ((string= type "select")
 912               (destructuring-bind (option-list &optional default) params
 913                 (format out-stream "<select name=\"~A\">" id)
 914                 (loop for (value label) in option-list
 915                       do (format out-stream "<option value=\"~A\"~:[~; selected~]>~A</option>" value (string= default value) label))
 916                 (format out-stream "</select>")))
 917              (t
 918                (destructuring-bind (&optional (autocomplete "off") default) params
 919                  (format out-stream "<input type=\"~A\" name=\"~A\" autocomplete=\"~A\"~@[ value=\"~A\"~]>" type id autocomplete (and default (encode-entities default))))))
 920         do (format out-stream ""))
 921   (if textarea
 922     (destructuring-bind (ta-name ta-contents) textarea
 923       (format out-stream "<div class=\"textarea-container\"><textarea name=\"~A\">~A</textarea><span class='markdown-reference-link'>You can use <a href='http://commonmark.org/help/' target='_blank'>Markdown</a> here.</span></div>" ta-name (encode-entities ta-contents))))
 924   (format out-stream "<input type=\"hidden\" name=\"csrf-token\" value=\"~A\"><input type=\"submit\" value=\"~A\">~@[~A~]</form>"
 925           csrf-token button-label end-html))
 926
 927 (defun page-toolbar-to-html (&key title new-post new-conversation logout (rss t) ignore enable-push-notifications)
 928   (unless *preview*
 929     (let ((out-stream *html-output*)
 930           (liu (logged-in-userid)))
 931       (format out-stream "<div class=\"page-toolbar~@[ hide-until-init~]\">" enable-push-notifications)
 932       (when logout
 933         (format out-stream "<form method=\"post\" action=\"/logout\"><input type=\"hidden\" name=\"csrf-token\" value=\"~A\"><button class=\"logout-button button\" name=\"logout\">Log out</button></form>"
 934                 (make-csrf-token)))
 935       (when ignore
 936         (funcall ignore))
 937       (when enable-push-notifications
 938         (format out-stream "<script>document.currentScript.outerHTML='<button id=\"enable-push-notifications\" class=\"button\" style=\"display: none\" data-enabled=\"~:[~;true~]\">~:*~:[En~;Dis~]able push notifications</button>'</script>"
 939                 (find-subscription *current-auth-token*)))
 940       (when (and new-conversation liu)
 941         (multiple-value-bind (text to)
 942             (typecase new-conversation (string (values "Send private message" new-conversation)) (t "New conversation"))
 943           (format out-stream "<a class=\"new-private-message button\" href=\"/conversation~@[?to=~A~]\">~A</a>"
 944                   to text)))
 945       (when (and new-post liu)
 946         (format out-stream "<a class=\"new-post button\" href=\"/edit-post~@[?section=~A~]\" accesskey=\"n\" title=\"Create new post [n]\">New post</a>"
 947                 (typecase new-post (string new-post) (t nil))))
 948       (when (and title rss)
 949         (format out-stream "<a class=\"rss\" rel=\"alternate\" type=\"application/rss+xml\" title=\"~A RSS feed\" href=\"~A\">RSS</a>"
 950                 title (replace-query-params (hunchentoot:request-uri*) "offset" nil "format" "rss")))
 951       (format out-stream "</div>"))))
 952
 953 (defun view-items-index (items &key section title current-uri hide-title need-auth extra-head (pagination (pagination-nav-bars)) (top-nav (lambda () (page-toolbar-to-html :title title))) (content-class "index-page") alternate-html)
 954   (alexandria:switch ((hunchentoot:get-parameter "format") :test #'string=)
 955                      ("rss"
 956                       (setf (hunchentoot:content-type*) "application/rss+xml; charset=utf-8")
 957                       (with-response-stream (out-stream)
 958                         (write-index-items-to-rss out-stream items :title title)))
 959                      (t
 960                        (emit-page (out-stream :title (if hide-title nil title) :description (site-description *current-site*) :content-class content-class
 961                                               :current-uri current-uri :robots (if (hunchentoot:get-parameter :offset) "noindex, nofollow")
 962                                               :pagination pagination :top-nav top-nav :extra-head extra-head)
 963                                   (if alternate-html
 964                                       (funcall alternate-html)
 965                                       (write-index-items-to-html out-stream items
 966                                                                  :need-auth need-auth
 967                                                                  :skip-section section))))))
 968
 969 (defun link-if-not (stream linkp url class text &key accesskey nofollow title)
 970   (declare (dynamic-extent linkp url text))
 971   (if (not linkp)
 972       (format stream "<a href=\"~A\" class=\"~A\"~@[ accesskey=\"~A\"~]~:[~; rel=\"nofollow\"~]~@[ title=\"~A\"~]>~A</a>" url class accesskey nofollow title text)
 973       (format stream "<span class=\"~A\"~@[ title=\"~A\"~]>~A</span>" class title text)))
 974
 975 (defgeneric main-site-link (site item-type item-designator &key)
 976   (:method ((site lw2-frontend-site) (item-type (eql :post)) (post-id string) &key slug comment-id direct-comment-link)
 977     (merge-uris
 978      (format nil "/posts/~A/~A~[~;#~A~;?commentId=~A~]" post-id slug (if comment-id (if direct-comment-link 2 1) 0) comment-id)
 979      (main-site-uri *current-site*)))
 980   (:method ((site lw2-frontend-site) (item-type (eql :tag)) (slug string) &key comment-id direct-comment-link)
 981     (when (not (and comment-id direct-comment-link))
 982       (merge-uris
 983        (format nil "/tag/~A~@[/discussion#~A~]" slug comment-id)
 984        (main-site-uri *current-site*)))))
 985
 986 (defun postprocess-markdown (markdown)
 987   (if (typep *current-site* 'alternate-frontend-site)
 988       (regex-replace-body
 989        ((concatenate 'string (regex-replace-all "\\." (site-uri *current-site*) "\\.") "posts/([^/ ]{17})/([^/# ]*)(?:(#comment-|/comment/|/answer/)([^/ ]{17}))?")
 990         markdown)
 991        (main-site-link *current-site*
 992                        :post (reg 0) :slug (reg 1) :comment-id (reg 3)
 993                        :direct-comment-link (and (reg 3) (reg 2) (string= "/" (reg 2) :end2 1))))
 994       markdown))
 995
 996 (defun redirect (uri &key (type :see-other) preserve-query)
 997   (setf (hunchentoot:return-code*) (ecase type (:see-other 303) (:permanent 301))
 998         (hunchentoot:header-out "Location") (if-let ((query (and preserve-query (hunchentoot:query-string*))))
 999                                                     (quri:render-uri (quri:make-uri :defaults uri :query query))
1000                                                     uri)))
1001
1002 (defun main-site-redirect (uri &key (type :see-other))
1003   (redirect (merge-uris uri (main-site-uri *current-site*)) :type type))
1004
1005 (defmacro request-method (&body method-clauses)
1006   (with-gensyms (request-method)
1007     `(let ((,request-method (hunchentoot:request-method*)))
1008        (cond
1009          ,.(loop for method-body in method-clauses
1010               collect (destructuring-bind (method args &body inner-body) method-body
1011                         `(,(if (eq method :get) `(member ,request-method '(:get :head)) `(eq ,request-method ,method))
1012                            ,(make-binding-form (mapcar (lambda (x) (append (ensure-list x) `(:request-type ,method))) args)
1013                                                inner-body))))))))
1014
1015 (defmacro define-page (name path-specifier additional-vars &body body)
1016   (labels ((make-lambda (args)
1017              (loop for a in args
1018                    collect (if (atom a) a (first a)))))
1019    (multiple-value-bind (path-specifier-form path-bindings-wrapper specifier-vars)
1020     (if (stringp path-specifier)
1021         (values path-specifier #'identity)
1022         (destructuring-bind (specifier-type specifier-body &rest specifier-args) path-specifier
1023           (ecase specifier-type
1024             (:function
1025               (values `(lambda (r) (funcall ,specifier-body (hunchentoot:request-uri r)))
1026                       (if specifier-args
1027                           (lambda (body) `(ignorable-multiple-value-bind ,(make-lambda specifier-args) (funcall ,specifier-body (hunchentoot:request-uri*)) ,body))
1028                           #'identity)
1029                       specifier-args))
1030             (:regex
1031               (let ((fn `(lambda (r) (ppcre:scan-to-strings ,specifier-body (hunchentoot:request-uri r)))))
1032                 (values fn
1033                         (lambda (body)
1034                           (with-gensyms (result-vector)
1035                             `(let ((,result-vector (nth-value 1 (funcall ,fn hunchentoot:*request*))))
1036                                (declare (type simple-vector ,result-vector)
1037                                         (ignorable ,result-vector))
1038                                (let
1039                                  ,(loop for v in (make-lambda specifier-args) as x from 0 collecting `(,v (if (> (length ,result-vector) ,x) (aref ,result-vector ,x))))
1040                                  ,body))))
1041                         specifier-args))))))
1042      `(hunchentoot:define-easy-handler (,name :uri ,path-specifier-form) ()
1043         (with-error-page
1044             (block nil
1045               ,(funcall path-bindings-wrapper
1046                         (make-binding-form (append (mapcar (lambda (x) (append (ensure-list x) '(:passthrough t))) specifier-vars) additional-vars)
1047                                            body))))))))
1048
1049 (define-component sort-widget (&key (sort-options '((:new :description "Sort by date posted")
1050                                                     (:hot :description "Sort by time-weighted score")
1051                                                     (:active :description "Sort by date posted or last comment")
1052                                                     (:old :description "Sort by date posted, oldest first")))
1053                                     (pref :default-sort) (param-name "sort") (html-class "sort"))
1054   (:http-args ((sort :real-name param-name :member (mapcar (lambda (x) (if (listp x) (first x) x)) sort-options))
1055                (sortedby :real-name "sortedBy" :type string)
1056                &without-csrf-check))
1057   (if sortedby
1058       (progn
1059         (renderer () nil)
1060         sortedby)
1061       (let ((sort-string (if sort (string-downcase sort))))
1062         (if sort-string
1063             (set-user-pref :default-sort sort-string))
1064         (renderer ()
1065                   (sublevel-nav-to-html sort-options
1066                                         (user-pref pref)
1067                                         :param-name param-name
1068                                         :extra-class html-class))
1069         (or sort-string (user-pref pref)))))
1070
1071 (define-component view-index ()
1072   (:http-args ((view :member '(:all :new :frontpage :featured :alignment-forum :questions :nominations :reviews :events) :default :frontpage)
1073                before after
1074                (offset :type fixnum)
1075                (limit :type fixnum :default (user-pref :items-per-page))
1076                (karma-threshold :type fixnum)
1077                &without-csrf-check))
1078   (when (eq view :new) (redirect (replace-query-params (hunchentoot:request-uri*) "view" "all" "all" nil) :type :permanent) (return))
1079   (component-value-bind ((sort-string sort-widget))
1080     (multiple-value-bind (posts total)
1081         (get-posts-index :view (string-downcase view) :before before :after after :offset offset :limit (1+ limit) :sort sort-string :karma-threshold karma-threshold)
1082       (let ((page-title (format nil "~@(~A posts~)" view)))
1083         (renderer ()
1084                   (view-items-index (firstn posts limit)
1085                                     :section view :title page-title :hide-title (eq view :frontpage)
1086                                     :pagination (pagination-nav-bars :offset (or offset 0) :total total :with-next (and (not total) (> (length posts) limit)))
1087                                     :content-class (format nil "index-page ~(~A~)-index-page" view)
1088                                     :top-nav (lambda ()
1089                                                (page-toolbar-to-html :title page-title
1090                                                                      :new-post (if (eq view :meta) "meta" t))
1091                                                (funcall sort-widget))))))))
1092
1093 (defmacro route-component (name lambda-list &rest args)
1094   `(lambda ,lambda-list
1095      (with-error-page
1096          (component-value-bind ((() (,name ,@args)))
1097                                (when ,name
1098                                  (funcall ,name))))))
1099
1100 (defmacro define-component-routes (site-class &rest clauses)
1101   `(progn
1102      ,@(iter
1103         (for clause in clauses)
1104         (destructuring-bind (name (route-class &rest route-args) route-bindings (component-name &rest component-args)) clause
1105           (collect `(define-route ',site-class ',route-class
1106                       :name ',name ,@route-args
1107                       :handler (route-component ,component-name ,route-bindings ,@component-args)))))))
1108
1109 (define-component-routes forum-site
1110   (view-root (standard-route :uri "/") () (view-index))
1111   (view-index (standard-route :uri "/index") () (view-index)))
1112
1113 (hunchentoot:define-easy-handler
1114     (view-site-routes
1115      :uri (lambda (req)
1116             (declare (ignore req))
1117             (with-site-context ((let ((host (or (hunchentoot:header-in* :x-forwarded-host) (hunchentoot:header-in* :host))))
1118                                   (or (find-site host)
1119                                       (error "Unknown site: ~A" host))))
1120               (call-route-handler *current-site* (hunchentoot:script-name*)))))
1121     nil)
1122
1123 (define-page view-post "/post" ((id :required t))
1124   (redirect (generate-item-link :post id) :type :permanent))
1125
1126 (define-page view-post-lw1-link (:function #'match-lw1-link) ()
1127   (redirect (convert-lw1-link (hunchentoot:script-name*)) :preserve-query t :type :permanent))
1128
1129 (define-page view-post-ea1-link (:function #'match-ea1-link) ()
1130   (redirect (convert-ea1-link (hunchentoot:script-name*)) :preserve-query t :type :permanent))
1131
1132 (define-page view-post-lw2-slug-link (:function #'match-lw2-slug-link) ()
1133   (redirect (convert-lw2-slug-link (hunchentoot:request-uri*)) :type :see-other))
1134
1135 (define-page view-post-lw2-sequence-link (:function #'match-lw2-sequence-link) ()
1136   (redirect (convert-lw2-sequence-link (hunchentoot:request-uri*)) :type :see-other))
1137
1138 (define-page view-feed "/feed" ()
1139   (redirect "/?format=rss" :type :permanent))
1140
1141 (define-page view-allposts "/allPosts" ()
1142   (redirect (format nil "/index~@[?~A~]" (hunchentoot:query-string*)) :type :see-other))
1143
1144 (define-page view-nominations "/nominations" ()
1145   (redirect "/index?view=nominations" :type :see-other))
1146
1147 (define-page view-reviews "/reviews" ()
1148   (redirect "/index?view=reviews" :type :see-other))
1149
1150 (define-page view-review-voting "/reviewVoting" ()
1151   (redirect "https://www.lesswrong.com/reviewVoting" :type :see-other))
1152
1153 (define-page view-coronavirus-link-database "/coronavirus-link-database" ()
1154   (redirect "https://www.lesswrong.com/coronavirus-link-database" :type :see-other))
1155
1156 (defun post-comment (&key need-auth ((:post-id post-id-real)) ((:tag-id tag-id-real)) shortform)
1157   (request-method
1158    (:post (text answer nomination nomination-review af post-id tag-id parent-answer-id parent-comment-id edit-comment-id retract-comment-id unretract-comment-id delete-comment-id)
1159      (let ((lw2-auth-token *current-auth-token*))
1160        (assert lw2-auth-token)
1161        (let* ((post-id (or post-id-real post-id))
1162               (tag-id (or tag-id-real tag-id))
1163               (question (when post-id (cdr (assoc :question (get-post-body post-id :auth-token lw2-auth-token)))))
1164               (new-comment-result
1165                (cond
1166                  (text
1167                   (let ((comment-data
1168                          (list-cond
1169                           (t :body (postprocess-markdown text))
1170                           ((and post-id (not (or edit-comment-id (and shortform (not parent-comment-id))))) :post-id post-id)
1171                           ((and tag-id (not edit-comment-id)) :tag-id tag-id)
1172                           (parent-comment-id :parent-comment-id parent-comment-id)
1173                           (answer :answer t)
1174                           (nomination :nominated-for-review "2020")
1175                           (nomination-review :reviewing-for-review "2020")
1176                           (parent-answer-id :parent-answer-id parent-answer-id)
1177                           (af :af t)
1178                           ((and shortform (not parent-comment-id)) :shortform t))))
1179                     (if edit-comment-id
1180                         (do-lw2-comment-edit lw2-auth-token edit-comment-id comment-data)
1181                         (do-lw2-comment lw2-auth-token comment-data))))
1182                  (retract-comment-id
1183                   (do-lw2-comment-edit lw2-auth-token retract-comment-id '((:retracted . t))))
1184                  (unretract-comment-id
1185                   (do-lw2-comment-edit lw2-auth-token unretract-comment-id '((:retracted . :false))))
1186                  (delete-comment-id
1187                   (do-lw2-comment-remove lw2-auth-token delete-comment-id :reason "Comment deleted by its author.")
1188                   nil))))
1189          (when post-id
1190            (ignore-errors
1191              (get-post-comments post-id :force-revalidate t)
1192              (when question
1193                (get-post-answers post-id :force-revalidate t))))
1194          (when text
1195            (alist-bind ((new-comment-id simple-string :--id)
1196                         (new-comment-html simple-string :html-body))
1197                        new-comment-result
1198                        (mark-comment-replied (alist* :parent-comment-id parent-comment-id :user-id *current-userid* new-comment-result))
1199                        (setf (markdown-source :comment new-comment-id new-comment-html) text)
1200                        (redirect (merge-uris (quri:make-uri :fragment (format nil "comment-~A" new-comment-id)
1201                                                             :query (list-cond (need-auth "need-auth" "y")))
1202                                              (hunchentoot:request-uri*))))))))))
1203
1204 (defun output-comments (out-stream id comments target &key overcomingbias-sort preview chrono replies-open)
1205   (labels ((output-comments-inner ()
1206              (with-error-html-block ()
1207                (if target
1208                    (comment-thread-to-html out-stream
1209                                            (lambda ()
1210                                              (comment-item-to-html
1211                                               out-stream
1212                                               target
1213                                               :level-invert preview
1214                                               :extra-html-fn (lambda (c-id)
1215                                                                (let ((*comment-individual-link* nil))
1216                                                                  (comment-tree-to-html out-stream (make-comment-parent-hash comments)
1217                                                                                        :target c-id
1218                                                                                        :level-invert preview))))))
1219                    (if comments
1220                        (progn #|<div class="comments-empty-message">(safe (pretty-number (length comments) id))</div>|#
1221                          (if chrono
1222                              (comment-chrono-to-html out-stream comments)
1223                              (let ((parent-hash (make-comment-parent-hash comments)))
1224                                (when overcomingbias-sort
1225                                  (setf (gethash nil parent-hash)
1226                                        (sort-items (gethash nil parent-hash) :old)))
1227                                (comment-tree-to-html out-stream parent-hash))))
1228                        <div class="comments-empty-message">("No ~As." id)</div>)))))
1229     (if preview
1230         (output-comments-inner)
1231         (progn (format out-stream "<div id=\"~As\" class=\"comments~:[~; replies-open~]\">" id (and *enable-voting* replies-open))
1232                (unless target
1233                  <script>initializeCommentControls\(\)</script>)
1234                (output-comments-inner)
1235                (format out-stream "</div>")))))
1236
1237 (define-json-endpoint (view-karma-vote-post forum-site "/karma-vote/post")
1238   (let ((auth-token *current-auth-token*))
1239     (request-method
1240      (:get (post-id)
1241        (hash-cond (make-hash-table)
1242          (post-id "Post" (sethash (make-hash-table) post-id (get-post-vote post-id auth-token)))
1243          (post-id "Comment" (get-post-comments-votes post-id auth-token))
1244          (post-id "Tag" (get-post-tag-votes post-id auth-token)))))))
1245
1246 (define-page view-post-lw2-link (:function #'match-lw2-link post-id comment-id * comment-link-type post-type)
1247                                 (need-auth
1248                                  chrono
1249                                  (show-comments :real-name "comments" :type boolean :default t)
1250                                  (format :type string))
1251   (request-method
1252    (:get ()
1253      (when (hunchentoot:get-parameter "commentId")
1254        (redirect (format nil "~A/comment/~A" (generate-item-link :post post-id) comment-id))
1255        (return))
1256      (let* ((lw2-auth-token *current-auth-token*)
1257             (preview (string-equal format "preview"))
1258             (show-comments (and (not preview) show-comments))
1259             (*enable-voting* (not (null (logged-in-userid)))))
1260        (multiple-value-bind (post title condition)
1261            (handler-case (nth-value 0 (get-post-body post-id :auth-token (and need-auth lw2-auth-token)))
1262              (serious-condition (c)
1263                (setf *enable-voting* nil)
1264                (values nil "[missing post]" c))
1265              (:no-error (post)
1266                (values post (cdr (assoc :title post)) nil)))
1267          (let* ((is-event (cdr (assoc :is-event post)))
1268                 (correct-subtype (if is-event "event" "post")))
1269            (when (string/= post-type correct-subtype)
1270              (redirect (generate-item-link :post post :comment-id comment-id :item-subtype correct-subtype))
1271              (return)))
1272          (labels ((extra-head ()
1273                     (when-let (canonical-source (or (and (not comment-id)
1274                                                          (cdr (assoc :canonical-source post)))
1275                                                     (and (always-canonical *current-site*)
1276                                                          (main-site-link *current-site* :post post-id :slug (cdr (assoc :slug post))
1277                                                                          :comment-id comment-id :direct-comment-link t))))
1278                               <link rel="canonical" href=canonical-source>)
1279                     <script>postId=(with-html-stream-output (:stream stream) (json:encode-json post-id stream))</script>
1280                     <script>alignmentForumPost=(if (cdr (assoc :af post)) "true" "false")</script>
1281                     (when (logged-in-userid)
1282                               (call-with-server-data 'process-vote-data (format nil "/karma-vote/post?post-id=~A" post-id))))
1283                   (retrieve-individual-comment (comment-thread-type)
1284                     (let* ((comments (case comment-thread-type
1285                                        (:comment (get-post-comments post-id))
1286                                        (:answer (get-post-answers post-id))))
1287                            (target-comment (find comment-id comments :key (lambda (c) (cdr (assoc :--id c))) :test #'string=)))
1288                       (values comments target-comment))))
1289            (if comment-id
1290                (let ((comment-thread-type (if (string= comment-link-type "answer") :answer :comment)))
1291                  (multiple-value-bind (comments target-comment) (retrieve-individual-comment comment-thread-type)
1292                    (unless target-comment
1293                      ;; If the comment was not found, try as an answer, or vice versa.
1294                      (setf comment-thread-type (if (eq comment-thread-type :comment) :answer :comment)
1295                            (values comments target-comment) (retrieve-individual-comment comment-thread-type))
1296                      (unless target-comment
1297                        (error 'lw2-not-found-error)))
1298                    (let* ((*comment-individual-link* t)
1299                           (display-name (get-username (cdr (assoc :user-id target-comment))))
1300                           (verb-phrase (cond
1301                                          ((and (eq comment-thread-type :answer)
1302                                                (not (cdr (assoc :parent-comment-id target-comment))))
1303                                           "answers")
1304                                          (t "comments on"))))
1305                      (emit-page (out-stream :title (format nil "~A ~A ~A" display-name verb-phrase title)
1306                                             :content-class "individual-thread-page comment-thread-page"
1307                                             :social-description (when-let (x (cdr (assoc :html-body target-comment))) (extract-excerpt x))
1308                                             :extra-head #'extra-head)
1309                                 (unless preview
1310                                   (format out-stream "<h1 class=\"post-title\">~A ~A <a href=\"~A\">~A</a></h1>"
1311                                           (encode-entities display-name)
1312                                           verb-phrase
1313                                           (generate-item-link :post post-id)
1314                                           (clean-text-to-html title :hyphenation nil)))
1315                                 (output-comments out-stream "comment" comments target-comment :chrono chrono :preview preview)))))
1316                (let ((post-sequences (get-post-sequences post-id)))
1317                  (emit-page (out-stream :title title
1318                                         :content-class (format nil "post-page comment-thread-page~{ ~A~}"
1319                                                                (list-cond ((cdr (assoc :question post)) "question-post-page")
1320                                                                           (post-sequences "in-sequence")
1321                                                                           ((not show-comments) "no-comments")))
1322                                         :social-description (when-let (x (cdr (assoc :html-body post))) (extract-excerpt x))
1323                                         :extra-head #'extra-head)
1324                             (cond
1325                               (condition
1326                                (error-explanation-case (error-to-html condition)
1327                                                        (lw2-not-allowed-error
1328                                                         <p>This probably means the post has been deleted or moved back to the author's drafts.</p>)))
1329                               (t
1330                                (post-body-to-html post)))
1331                             (when (and lw2-auth-token (equal (logged-in-userid) (cdr (assoc :user-id post))))
1332                               (format out-stream "<div class=\"post-controls\"><a class=\"edit-post-link button\" href=\"/edit-post?post-id=~A\" accesskey=\"e\" title=\"Edit post [e]\">Edit post</a></div>"
1333                                       (cdr (assoc :--id post))))
1334                             (alist-bind (fm-crosspost foreign-post) post
1335                               (alist-bind (is-crosspost hosted-here) fm-crosspost
1336                                 (when is-crosspost
1337                                   (if-let (crosspost-site-host (backend-magnum-crosspost-site *current-backend*))
1338                                       (let* ((*current-site* (find-site crosspost-site-host))
1339                                              (crosspost-site-title (main-site-title *current-site*)))
1340                                         (alist-bind (comment-count base-score) foreign-post
1341                                           <a class="crosspost" href=(generate-item-link :post foreign-post :absolute t)>Crossposted (if hosted-here "to" "from") (progn crosspost-site-title)
1342                                                                                                                         \ \((safe (pretty-number (or base-score 0) "point")), (safe (pretty-number (or comment-count 0) "comment"))\)</a>))
1343                                       (error "Could not retrieve crossposted post. magnum-crosspost-site not configured.")))))
1344                             (post-nav-links post post-sequences)
1345                             (activate-client-trigger "postLoaded")
1346                             (when show-comments
1347                               (write-string "<script> </script>" out-stream)
1348                               (finish-output out-stream)
1349                               (with-error-html-block ()
1350                                 ;; Temporary hack to support nominations
1351                                 (let* ((real-comments (get-post-comments post-id))
1352                                        (answers (when (cdr (assoc :question post))
1353                                                   (get-post-answers post-id)))
1354                                        (posted-at (and (typep *current-backend* 'backend-lw2)
1355                                                        (cdr (assoc :posted-at post))))
1356                                        (posted-timestamp (and posted-at (local-time:parse-timestring posted-at)))
1357                                        (now (local-time:now))
1358                                        (nominations-open nil)
1359                                        (reviews-eligible (timerange "2020-01-01" posted-timestamp "2021-01-01"))
1360                                        (reviews-open (and reviews-eligible (timerange "2021-12-14" now "2022-01-11"))))
1361                                   (labels ((top-level-property (comment property)
1362                                              (or (cdr (assoc property comment))
1363                                                  (cdr (assoc property (cdr (assoc :top-level-comment comment)))))))
1364                                     (multiple-value-bind (normal-comments nominations reviews)
1365                                         (loop for comment in real-comments
1366                                            if (top-level-property comment :nominated-for-review)
1367                                            collect comment into nominations
1368                                            else if (top-level-property comment :reviewing-for-review)
1369                                            collect comment into reviews
1370                                            else
1371                                            collect comment into normal-comments
1372                                            finally (return (values normal-comments nominations reviews)))
1373                                       (loop for (name comments open) in (list-cond ((or nominations nominations-open)
1374                                                                                     (list "nomination" nominations nominations-open))
1375                                                                                    ((or reviews reviews-open)
1376                                                                                     (list "review" reviews reviews-open))
1377                                                                                    ((cdr (assoc :question post))
1378                                                                                     (list "answer" answers t))
1379                                                                                    (t
1380                                                                                     (list "comment" normal-comments t)))
1381                                          do (output-comments out-stream name comments nil
1382                                                              :replies-open open
1383                                                              :overcomingbias-sort (cdr (assoc :comment-sort-order post)) :chrono chrono :preview preview))))))))))))))
1384    (:post ()
1385           (post-comment :post-id post-id :need-auth need-auth))))
1386
1387 (defparameter *edit-post-template* (compile-template* "edit-post.html"))
1388
1389 (define-page view-edit-post "/edit-post" (title url section tags post-id link-post)
1390   (request-method
1391     (:get ()
1392      (let* ((csrf-token (make-csrf-token))
1393             (post-body (if post-id (get-post-body post-id :auth-token (hunchentoot:cookie-in "lw2-auth-token"))))
1394             (section (or section (loop for (sym . sec) in '((:draft . "drafts") (:meta . "meta") (:frontpage-date . "frontpage"))
1395                                        if (cdr (assoc sym post-body)) return sec
1396                                        finally (return "all")))))
1397        (emit-page (out-stream :title (if post-id "Edit Post" "New Post") :content-class "edit-post-page")
1398                   (render-template* *edit-post-template* out-stream
1399                                     :csrf-token csrf-token
1400                                     :title (cdr (assoc :title post-body))
1401                                     :url (cdr (assoc :url post-body))
1402                                     :question (cdr (assoc :question post-body))
1403                                     :tags-supported (typep *current-backend* 'backend-accordius)
1404                                     :tags (when (and post-id (typep *current-backend* 'backend-accordius)) (do-wl-rest-query (format nil "posts/~a/update_tagset/" post-id) '()))
1405                                     :post-id post-id
1406                                     :section-list (loop for (name desc) in '(("all" "All") ("meta" "Meta") ("frontpage" "Frontpage") ("drafts" "Drafts"))
1407                                                      when (or (string= name section) (member name '("drafts" "all") :test #'string=))
1408                                                      collect (alist :name name :desc desc :selected (string= name section)))
1409                                     :lesswrong-misc (typep *current-backend* 'backend-lw2-misc-features)
1410                                     :submit-to-frontpage (if post-id (cdr (assoc :submit-to-frontpage post-body)) t)
1411                                     :markdown-source (or (and post-id (markdown-source :post post-id (cdr (assoc :html-body post-body)))) "")))))
1412     (:post (text question submit-to-frontpage)
1413      (let ((lw2-auth-token *current-auth-token*)
1414            (url (if (string= url "") nil url)))
1415        (assert lw2-auth-token)
1416        (let* ((post-data
1417                (list-cond
1418                 (t :body (postprocess-markdown text))
1419                 (t :title (or (nonempty-string title) "Untitled"))
1420                 (link-post :url url)
1421                 (t :meta (or (string= section "meta") :false))
1422                 ((not post-id) :is-event nil)
1423                 (t :draft (or (string= section "drafts") :false))
1424                 ((typep *current-backend* 'backend-lw2-misc-features) :submit-to-frontpage (and submit-to-frontpage t))
1425                 ((not post-id) :question (if question t :false))))
1426               (post-unset
1427                (list-cond
1428                 ((not link-post) :url t)))
1429               (new-post-data
1430                (if post-id
1431                    (do-lw2-post-edit lw2-auth-token post-id post-data post-unset)
1432                    (do-lw2-post lw2-auth-token post-data)))
1433               (new-post-id (cdr (assoc :--id new-post-data))))
1434          (assert new-post-id)
1435          (when (typep *current-backend* 'backend-accordius)
1436            (do-wl-rest-mutate :post
1437              (format nil "posts/~a/update_tagset/" post-id)
1438              (alist "tags" tags)
1439              lw2-auth-token))
1440          (setf (markdown-source :post new-post-id (cdr (assoc :html-body new-post-data))) text)
1441          (ignore-errors (get-post-body post-id :force-revalidate t))
1442          (redirect (if (js-true (cdr (assoc :draft post-data)))
1443                        (concatenate 'string (generate-item-link :post new-post-data) "?need-auth=y")
1444                        (generate-item-link :post new-post-data))))))))
1445
1446 (define-json-endpoint (view-karma-vote forum-site "/karma-vote")
1447     (let ((auth-token *current-auth-token*))
1448       (request-method
1449        (:post (target target-type (vote-json :real-name "vote"))
1450               (let ((vote (safe-decode-json vote-json)))
1451                 (multiple-value-bind (current-vote result)
1452                     (do-lw2-vote auth-token target-type target vote)
1453                   (alist-bind (vote-count base-score af af-base-score extended-score) result
1454                               (let ((vote-buttons (vote-buttons base-score
1455                                                                 :as-text t
1456                                                                 :af-score (and af af-base-score)
1457                                                                 :vote-count (+ vote-count (if (member (cdr (assoc :karma current-vote)) '(nil "neutral") :test #'equal)
1458                                                                                               0
1459                                                                                               1))
1460                                                                 :extended-score extended-score))
1461                                     (out (make-hash-table)))
1462                                 (loop for (axis . axis-vote) in current-vote
1463                                    do (setf (gethash axis out) (list* axis-vote (gethash axis vote-buttons))))
1464                                 out))))))))
1465
1466 (delete-easy-handler 'view-karma-vote)
1467
1468 (define-json-endpoint (view-user-status login-site "/current-user-status")
1469     (let ((auth-token *current-auth-token*))
1470       (request-method
1471        (:get ()
1472              (if (lw2-graphql-query (graphql-query-string "currentUser" nil '(:--id)) :auth-token auth-token)
1473                  (sethash (make-hash-table)
1474                           "notifications" (check-notifications (logged-in-userid) auth-token)
1475                           "alignmentForumAllowed" (member "alignmentForum" (cdr (assoc :groups (get-user :user-id (logged-in-userid)))) :test #'string=))
1476                  (with-cache-transaction
1477                    (cache-del "auth-token-to-userid" auth-token)
1478                    (cache-del "auth-token-to-username" auth-token)))))))
1479
1480 (hunchentoot:define-easy-handler (view-check-notifications :uri "/check-notifications") (format)
1481   (with-error-page
1482       (setf (hunchentoot:content-type*) "application/json")
1483       (if *current-auth-token*
1484           (let ((notifications-status (check-notifications (logged-in-userid) *current-auth-token* :full (string= format "push"))))
1485             (json:encode-json-to-string notifications-status)))))
1486
1487 (hunchentoot:define-easy-handler (view-ignore-user :uri "/ignore-user") ((csrf-token :request-type :post) (target-id :request-type :post) (state :request-type :post) return)
1488   (with-error-page
1489       (check-csrf-token csrf-token)
1490       (let ((user-id (logged-in-userid)))
1491         (unless user-id (error "Not logged in."))
1492         (with-cache-transaction
1493             (let ((ignore-hash (get-ignore-hash user-id)))
1494               (if (string= state "ignore")
1495                   (setf (gethash target-id ignore-hash) t)
1496                   (remhash target-id ignore-hash))
1497               (cache-put "user-ignore-list" user-id ignore-hash :value-type :json))))
1498       (when return
1499         (redirect return))))
1500
1501 (client-defun comment-controls (&key standalone parent-comment-id parent-answer-id edit-comment-id)
1502   (flet ((inner ()
1503            <form method="post" id="conversation-form" class="aligned-form">
1504              <div class="textarea-container">
1505                <textarea name="text" oninput="enableBeforeUnload();"></textarea>
1506                <span class="markdown-reference-link">You can use <a href="http://commonmark.org/help/" target="_blank">Markdown</a> here.</span>
1507                <button type="button" class="guiedit-mobile-auxiliary-button guiedit-mobile-help-button">Help</button>
1508                <button type="button" class="guiedit-mobile-auxiliary-button guiedit-mobile-exit-button">Exit</button>
1509              </div>
1510              <div>
1511                (macrolet ((hidden-var (name)
1512                             `(when ,name <input type="hidden" name=,(string-downcase name) value=,name>)))
1513                  (hidden-var parent-comment-id)
1514                  (hidden-var parent-answer-id)
1515                  (hidden-var edit-comment-id))
1516                <input name="csrf-token" value=(make-csrf-token) type="hidden">
1517                <input value="Submit" type="submit">
1518              </div>
1519              </form>))
1520     (if standalone
1521         <div class="posting-controls standalone with-markdown-editor" onsubmit="disableBeforeUnload();">(with-html-stream-output (inner))</div>
1522         (inner))))
1523
1524 (define-json-endpoint (view-karma-vote-shortform shortform-site "/karma-vote/shortform")
1525   (let ((auth-token *current-auth-token*))
1526     (request-method
1527      (:get ((offset :type fixnum :default 0))
1528            (sethash (make-hash-table)
1529                     "Comment" (get-shortform-votes auth-token :offset offset))))))
1530
1531 (define-component view-comments-index (index-type)
1532   (:http-args ((offset :type fixnum)
1533                (limit :type fixnum)
1534                (view :member '(nil :alignment-forum))))
1535   (request-method
1536    (:get ()
1537      (let* ((want-total (not (or (typep *current-backend* 'backend-lw2) (typep *current-backend* 'backend-ea-forum)))) ; LW2/EAF can't handle total queries. TODO: handle this in backend.
1538             (shortform (eq index-type :shortform))
1539             (with-voting (not (null (and shortform (logged-in-userid))))))
1540        (multiple-value-bind (title query-view top-nav)
1541            (cond
1542              (shortform (values "Shortform" "shortform" (if (logged-in-userid) (lambda () (comment-controls :standalone t)))))
1543              (t (values (case view (:alignment-forum "Alignment Forum recent comments") (t "Recent comments")) "allRecentComments" nil)))
1544          (multiple-value-bind (recent-comments total)
1545              (if (or (not (eq index-type :recent-comments)) offset limit view (/= (user-pref :items-per-page) 20))
1546                  (let ((*use-alignment-forum* (eq view :alignment-forum)))
1547                    (lw2-graphql-query (lw2-query-string :comment :list
1548                                                         (remove nil (alist :view query-view
1549                                                                            :limit (or limit (user-pref :items-per-page)) :offset offset)
1550                                                                 :key #'cdr)
1551                                                         :context (if shortform :shortform :index)
1552                                                         :with-total want-total)))
1553                  (get-recent-comments :with-total want-total))
1554            (renderer ()
1555              (view-items-index recent-comments
1556                                :title title
1557                                :extra-head (lambda ()
1558                                              (when with-voting
1559                                                (call-with-server-data 'process-vote-data (format nil "/karma-vote/shortform?offset=~A" (or offset 0)))))
1560                                :content-class (if shortform "index-page shortform-index-page comment-thread-page" "index-page comment-index-page")
1561                                :pagination (pagination-nav-bars :offset (or offset 0) :with-next (not want-total) :total (if want-total total))
1562                                :top-nav (lambda () (page-toolbar-to-html :title title) (when top-nav (funcall top-nav)))
1563                                :alternate-html (if (eq index-type :shortform)
1564                                                    (lambda ()
1565                                                      (let ((*enable-voting* with-voting))
1566                                                        <div class="comments">
1567                                                          (comment-tree-to-html *html-output*
1568                                                                                (make-comment-parent-hash
1569                                                                                 (flatten-shortform-comments recent-comments)))
1570                                                        </div>)))))))))
1571    (:post ()
1572      (post-comment :shortform t))))
1573
1574 (define-component-routes forum-site (view-recent-comments (standard-route :uri "/recentcomments") () (view-comments-index :recent-comments)))
1575 (define-component-routes shortform-site (view-shortform (standard-route :uri "/shortform") () (view-comments-index :shortform)))
1576
1577 (delete-easy-handler 'view-recent-comments)
1578
1579 (defun tag-to-html (tag &key skip-headline)
1580   (schema-bind (:tag tag :auto :context :body)
1581     (alist-bind (edited-at html user-id) description
1582       (unless skip-headline
1583         <h1 class="post-title">(safe (clean-text-to-html name))</h1>
1584         <div class="post-meta">
1585           <span>(if core "Core ")(if wiki-only "Wiki" "Tag")</span>
1586           (when (and (nonempty-string edited-at) (nonempty-string user-id))
1587             <span>Last edit: (pretty-time-html edited-at)
1588                   \ by <a class="author" href=("/users/~A" (get-user-slug user-id))>(get-username user-id)</a>
1589             </span>)
1590         </div>)
1591       (when html
1592         <div class="tag-description body-text">(with-html-stream-output (:stream stream) (let ((*memoized-output-stream* stream)) (clean-html* html)))</div>))))
1593
1594 (defun tag-list-to-html (tags)
1595   <ul class="tag-list">
1596     (iter (for tag in tags)
1597           (schema-bind (:tag tag :auto :context :index)
1598                        <li><a class="post-title-link" href=("/tag/~A" slug)>(safe (clean-text-to-html name))(if wiki-only
1599                                                                                                                 " (wiki)"
1600                                                                                                                 (if post-count (format nil " (~A)" post-count)))</a></li>))
1601   </ul>)
1602
1603 (define-json-endpoint (view-user-autocomplete forum-site "/-user-autocomplete")
1604     (request-method
1605      (:get (q)
1606           (lw2-search-query q :indexes '("test_users")))))
1607
1608 (define-json-endpoint (view-karma-vote-tag forum-site "/karma-vote/tag")
1609   (let ((auth-token *current-auth-token*))
1610     (request-method
1611      (:get (tag-id post-id)
1612        (hash-cond (make-hash-table)
1613          (tag-id "Post" (get-tag-post-votes tag-id auth-token))
1614          (tag-id "Comment" (get-tag-comments-votes tag-id auth-token))
1615          (post-id "Tag" (get-post-tag-votes post-id auth-token)))))))
1616
1617 (define-component view-tag (slug tail)
1618   (:http-args ((sort :default :relevant :member '(:relevant :new :old))))
1619   (when (nonempty-string tail)
1620     (redirect (format nil "/tag/~A" slug))
1621     (return))
1622   (let ((tag (first (lw2-graphql-query (lw2-query-string :tag :list (alist :view "tagBySlug" :slug slug) :context :body)))))
1623     (unless tag
1624       (error 'lw2-not-found-error))
1625     (request-method
1626      (:get ()
1627        (let* ((posts (get-tag-posts slug))
1628               (posts (if (eq sort :relevant) posts (sort-items posts sort))))
1629          (schema-bind (:tag tag :auto :context :body)
1630            (renderer ()
1631              (view-items-index posts
1632                                :title (format nil "~A tag" name)
1633                                :extra-head (lambda ()
1634                                              (when-let (canonical-source (and (always-canonical *current-site*)
1635                                                                               (main-site-link *current-site* :tag slug)))
1636                                                <link rel="canonical" href=canonical-source>)
1637                                              (when (logged-in-userid)
1638                                                (call-with-server-data 'process-vote-data (format nil "/karma-vote/tag?tag-id=~A" tag-id))))
1639                                :top-nav (lambda ()
1640                                           (page-toolbar-to-html :title name :rss (not wiki-only))
1641                                           (tag-to-html tag)
1642                                           (when (and posts (not *preview*))
1643                                             (sublevel-nav-to-html '(:relevant :new :old)
1644                                                                   sort
1645                                                                   :default :relevant
1646                                                                   :param-name "sort"
1647                                                                   :extra-class "sort")))
1648                                :content-class "index-page tag-index-page"
1649                                :alternate-html (lambda ()
1650                                                  (unless wiki-only
1651                                                    (write-index-items-to-html *html-output* posts))
1652                                                  (when (typep *current-backend* 'backend-lw2-tags-comments)
1653                                                    (finish-output *html-output*)
1654                                                    (let ((*enable-voting* (not (null (logged-in-userid))))
1655                                                          (comments (lw2-graphql-query (lw2-query-string :comment :list (alist :view "tagDiscussionComments" :tag-id tag-id)))))
1656                                                      (output-comments *html-output* "comment" comments nil :replies-open t)))))))))
1657      (:post ()
1658        (schema-bind (:tag tag (tag-id))
1659          (renderer ()
1660            (post-comment :tag-id tag-id)))))))
1661
1662 (define-component-routes forum-site (view-tag (regex-route :regex "^/(?:tag|topics)/([^/?]+)(/[^/?]*)?") (slug tail) (view-tag slug tail)))
1663
1664 (define-route 'ea-forum-viewer-site 'regex-route :name 'view-tags-redirect :regex "^/tag/" :handler (lambda () (redirect (ppcre:regex-replace "^/tag/" (hunchentoot:request-uri*) "/topics/"))))
1665
1666 (define-component view-tags-index ()
1667   (:http-args ())
1668   (multiple-value-bind (all-tags portal)
1669       (lw2-graphql-query-multi
1670        (list (lw2-query-string* :tag :list (alist :view "allTagsAlphabetical"))
1671              (lw2-query-string* :tag :list (alist :view "tagBySlug" :slug "portal") :context :body)))
1672     (let ((core-tags
1673            (iter (for tag in all-tags)
1674                  (schema-bind (:tag tag (core))
1675                               (when core (collect tag)))))
1676           (title (if (typep *current-site* 'lesswrong-viewer-site) "Concepts Portal" "Tags Portal")))
1677       (renderer ()
1678         (emit-page (out-stream :title title)
1679           <article>
1680             <h1 class="post-title">(safe title)</h1>
1681             (tag-to-html (first portal) :skip-headline t)
1682           </article>
1683           (iter (for (title . tags) in (alist "Core Tags" core-tags "All Tags" all-tags))
1684                 (progn
1685                   <h1>(safe title)</h1>
1686                   (tag-list-to-html tags))))))))
1687
1688 (define-component-routes forum-site (view-tags-index (standard-route :uri "/tags") () (view-tags-index)))
1689 (define-component-routes forum-site (view-tags-index-alt (standard-route :uri "/topics") () (view-tags-index)))
1690
1691 (define-route 'forum-site 'standard-route :name 'view-tags-index-redirect :uri "/tags/all" :handler (lambda () (redirect "/tags")))
1692 (define-route 'forum-site 'standard-route :name 'view-tags-index-redirect :uri "/topics/all" :handler (lambda () (redirect "/topics")))
1693
1694 (define-route 'alternate-frontend-site 'standard-route :name 'view-tags-voting-redirect :uri "/tagVoting" :handler (lambda () (main-site-redirect "/tagVoting")))
1695 (define-route 'alternate-frontend-site 'standard-route :name 'view-tags-dashboard-redirect :uri "/tags/dashboard" :handler (lambda () (main-site-redirect "/tags/dashboard")))
1696
1697 (hunchentoot:define-easy-handler (view-push-register :uri "/push/register") ()
1698   (with-error-page
1699       (let* ((data (call-with-safe-json (lambda ()
1700                                           (json:decode-json-from-string
1701                                            (hunchentoot:raw-post-data :force-text t :external-format :utf-8)))))
1702              (subscription (cdr (assoc :subscription data)))
1703              (cancel (cdr (assoc :cancel data))))
1704         (cond
1705           (subscription
1706            (make-subscription *current-auth-token*
1707                               (cdr (assoc :endpoint subscription))
1708                               (cdr (assoc :expires *current-auth-status*)))
1709            (send-notification (cdr (assoc :endpoint subscription)) :ttl 120))
1710           (cancel
1711            (delete-subscription *current-auth-token*)))
1712         nil)))
1713
1714 (hunchentoot:define-easy-handler (view-inbox-redirect :uri "/push/go-inbox") ()
1715   (with-error-page
1716       (redirect (format nil "/users/~A?show=inbox" *current-user-slug*))))
1717
1718 (define-page view-user (:regex "^/users/(.*?)(?:$|\\?)|^/user" user-slug) (id
1719                                                                              (offset :type fixnum :default 0)
1720                                                                              (show :member '(:all :posts :comments :drafts :conversations :inbox) :default :all)
1721                                                                              (sort :member '(:top :new :old) :default :new))
1722              (let* ((auth-token (if (eq show :inbox) *current-auth-token*))
1723                     (user-info
1724                      (let ((ui (get-user (cond (user-slug :user-slug) (id :user-id)) (or user-slug id) :auth-token auth-token)))
1725                        (if (and (not (cdr (assoc :deleted ui))) (cdr (assoc :--id ui)))
1726                            ui
1727                            (error 'lw2-user-not-found-error))))
1728                     (user-id (cdr (assoc :--id user-info)))
1729                     (own-user-page (logged-in-userid user-id))
1730                     (display-name (if user-slug (cdr (assoc :display-name user-info)) user-id))
1731                     (show-text (if (not (eq show :all)) (string-capitalize show)))
1732                     (title (format nil "~A~@['s ~A~]" display-name show-text))
1733                     (sort-type (case sort (:top :score) (:new :date) (:old :date-reverse))))
1734                (multiple-value-bind (items total)
1735                  (case show
1736                    (:posts
1737                     (get-user-page-items user-id :posts :offset offset :limit (+ 1 (user-pref :items-per-page)) :sort-type sort-type))
1738                    (:comments
1739                     (get-user-page-items user-id :comments :offset offset :limit (+ 1 (user-pref :items-per-page)) :sort-type sort-type))
1740                    (:drafts
1741                     (get-user-page-items user-id :posts :drafts t :offset offset :limit (+ 1 (user-pref :items-per-page)) :auth-token (hunchentoot:cookie-in "lw2-auth-token")))
1742                    (:conversations
1743                      (let ((conversations
1744                              (lw2-graphql-query (lw2-query-string :conversation :list
1745                                                                   (alist :view "userConversations" :limit (+ 1 (user-pref :items-per-page)) :offset offset :user-id user-id)
1746                                                                   :fields '(:--id :created-at :title (:participants :display-name :slug) :----typename))
1747                                                 :auth-token (hunchentoot:cookie-in "lw2-auth-token"))))
1748                        (lw2-graphql-query-map
1749                          (lambda (c)
1750                            (lw2-query-string* :message :total (alist :view "messagesConversation" :conversation-id (cdr (assoc :--id c)))))
1751                          conversations
1752                          :postprocess (lambda (c result)
1753                                         (acons :messages-total result c))
1754                          :auth-token (hunchentoot:cookie-in "lw2-auth-token"))))
1755                    (:inbox
1756                     (error-explanation-case
1757                      (prog1
1758                        (let ((notifications (get-notifications :user-id user-id :offset offset :auth-token (hunchentoot:cookie-in "lw2-auth-token")))
1759                              (last-check (ignore-errors (local-time:parse-timestring (cdr (assoc :last-notifications-check user-info))))))
1760                          (labels ((check-new (key obj)
1761                                     (if (ignore-errors (local-time:timestamp< last-check (local-time:parse-timestring (cdr (assoc key obj)))))
1762                                         (acons :highlight-new t obj)
1763                                         obj))
1764                                   (check-replied (comment)
1765                                     (let* ((post-id (cdr (assoc :post-id comment)))
1766                                            (comment-id (cdr (assoc :--id comment)))
1767                                            (reply-comment-id (check-comment-replied comment-id user-id)))
1768                                       (if reply-comment-id
1769                                           (acons :replied (list :post post-id :comment-id reply-comment-id) comment)
1770                                           comment))))
1771                            (lw2-graphql-query-map
1772                              (lambda (n)
1773                                (alexandria:switch ((cdr (assoc :document-type n)) :test #'string=)
1774                                                   ("comment"
1775                                                    (lw2-query-string* :comment :single
1776                                                                       (alist :document-id (cdr (assoc :document-id n)))
1777                                                                       :context :index))
1778                                                   ("post"
1779                                                    (lw2-query-string* :post :single (alist :document-id (cdr (assoc :document-id n)))))
1780                                                   ("message"
1781                                                    (lw2-query-string* :message :single (alist :document-id (cdr (assoc :document-id n)))
1782                                                                       :fields *messages-index-fields*))
1783                                                   (t
1784                                                     (values n t))))
1785                              notifications
1786                              :postprocess (lambda (n result)
1787                                             (if result
1788                                                 (funcall (if (string= (cdr (assoc :document-type n)) "comment") #'check-replied #'identity)
1789                                                          (check-new
1790                                                           (alexandria:switch ((cdr (assoc :document-type n)) :test #'string=)
1791                                                                              ("comment" :posted-at)
1792                                                                              ("post" :posted-at)
1793                                                                              ("message" :created-at))
1794                                                           result))
1795                                                 n))
1796                              :auth-token auth-token)))
1797                        (do-user-edit
1798                          (hunchentoot:cookie-in "lw2-auth-token")
1799                          user-id
1800                          (alist :last-notifications-check (timestamp-to-graphql (local-time:now)))))
1801                      (lw2-not-allowed-error
1802                       <p>This may mean your login token has expired or become invalid. You can try <a href="/login">logging in again</a>.</p>)))
1803                    (t
1804                     (get-user-page-items user-id :both :offset offset :limit (+ 1 (user-pref :items-per-page)) :sort-type sort-type)))
1805                  (let ((with-next (> (length items) (+ (if (eq show :all) offset 0) (user-pref :items-per-page))))
1806                        (interleave (if (eq show :all) (comment-post-interleave items :limit (user-pref :items-per-page) :offset (if (eq show :all) offset nil) :sort-by sort-type) (firstn items (user-pref :items-per-page))))) ; this destructively sorts items
1807                    (view-items-index interleave :title title
1808                                      :content-class (format nil "user-page~@[ ~A-user-page~]~:[~; own-user-page~]" (string-downcase show) own-user-page)
1809                                      :current-uri (format nil "/users/~A" user-slug)
1810                                      :section :personal
1811                                      :pagination (pagination-nav-bars :offset offset :total total :with-next (if (not total) with-next))
1812                                      :need-auth (eq show :drafts) :section (if (eq show :drafts) "drafts" nil)
1813                                      :top-nav (lambda ()
1814                                                 (page-toolbar-to-html :title title
1815                                                                       :enable-push-notifications (eq show :inbox)
1816                                                                       :rss (not (member show '(:drafts :conversations :inbox)))
1817                                                                       :new-post (if (eq show :drafts) "drafts" t)
1818                                                                       :new-conversation (if own-user-page t user-slug)
1819                                                                       :ignore (if (and (logged-in-userid) (not own-user-page))
1820                                                                                   (lambda ()
1821                                                                                     (let ((ignored (gethash user-id *current-ignore-hash*)))
1822                                                                                       <form method="post" action="/ignore-user">
1823                                                                                         <button class=("button ~A" (if ignored "unignore-button" "ignore-button"))>(if ignored "Unignore user" "Ignore user")</button>
1824                                                                                         <input type="hidden" name="csrf-token" value=(make-csrf-token)>
1825                                                                                         <input type="hidden" name="target-id" value=user-id>
1826                                                                                         <input type="hidden" name="state" value=(if ignored "unignore" "ignore")>
1827                                                                                         <input type="hidden" name="return" value=(hunchentoot:request-uri*)>
1828                                                                                       </form>)))
1829                                                                       :logout own-user-page)
1830                                                 (alist-bind ((actual-id string :--id)
1831                                                              (actual-slug string :slug)
1832                                                              (karma (or null fixnum))
1833                                                              (af-karma (or null fixnum)))
1834                                                             user-info
1835                                                   <h1 class="page-main-heading"
1836                                                       (when (not own-user-page)
1837                                                         (format nil "data-~:[~;anti-~]~:*kibitzer-redirect=~:[/users/~*~A~;/user?id=~A~]"
1838                                                                 user-slug actual-id actual-slug))>
1839                                                       (progn display-name)
1840                                                       (let ((full-name (get-user-full-name user-id)))
1841                                                         (when (and user-slug (stringp full-name) (> (length full-name) 0))
1842                                                                   <span class="user-full-name">\((progn full-name)\)</span>))
1843                                                   </h1>
1844                                                   <div class="user-stats">
1845                                                     Karma:
1846                                                     <span class="karma-type">
1847                                                       <span class="karma-total">(if user-slug (pretty-number (or karma 0)) "##")</span>(if af-karma " (LW),")
1848                                                     </span>\
1849                                                     (when af-karma
1850                                                       <span class="karma-type">
1851                                                         <span class="karma-total af-karma-total">(if user-slug (pretty-number (or af-karma 0)) "##")</span> \(AF\)
1852                                                       </span>)
1853                                                   </div>
1854                                                   (when-let (html-bio (cdr (assoc :html-bio user-info)))
1855                                                     <div class="user-bio body-text">
1856                                                       (with-html-stream-output (:stream stream)
1857                                                         (let ((*memoized-output-stream* stream))
1858                                                           (clean-html* html-bio)))
1859                                                     </div>))
1860                                                 (sublevel-nav-to-html `(:all :posts :comments
1861                                                                              ,@(if own-user-page
1862                                                                                    '(:drafts :conversations :inbox)))
1863                                                                       show
1864                                                                       :default :all)
1865                                                 (when (member show '(:all :posts :comments))
1866                                                   (sublevel-nav-to-html '(:new :top :old)
1867                                                                         sort
1868                                                                         :default :new
1869                                                                         :param-name "sort"
1870                                                                         :extra-class "sort"))))))))
1871
1872 (defparameter *conversation-template* (compile-template* "conversation.html"))
1873
1874 (define-page view-conversation "/conversation" (id to subject)
1875   (request-method
1876    (:get ()
1877      (cond
1878        ((and id to) (error "This is an invalid URL."))
1879        (id
1880         (multiple-value-bind (conversation messages)
1881             (get-conversation-messages id (hunchentoot:cookie-in "lw2-auth-token"))
1882           (let ((conversation (rectify-conversation conversation)))
1883             (view-items-index (nreverse messages) :content-class "conversation-page" :need-auth t :title (encode-entities (cdr (assoc :title conversation)))
1884                               :top-nav (lambda () (render-template* *conversation-template* *html-output*
1885                                                                     :conversation conversation :csrf-token (make-csrf-token)))))))
1886        (t
1887         (emit-page (out-stream :title "New conversation" :content-class "conversation-page")
1888                    (render-template* *conversation-template* out-stream
1889                                      :to to
1890                                      :subject subject
1891                                      :csrf-token (make-csrf-token))))))
1892    (:post ((text :required t))
1893      (let* ((id (or id
1894                     (let ((participant-ids (list (logged-in-userid) (cdar (lw2-graphql-query (lw2-query-string :user :single (alist :slug to) :fields '(:--id)))))))
1895                       (do-create-conversation (hunchentoot:cookie-in "lw2-auth-token") (alist :participant-ids participant-ids :title subject))))))
1896        (do-create-message (hunchentoot:cookie-in "lw2-auth-token") id text)
1897        (redirect (format nil "/conversation?id=~A" id))))))
1898
1899 (defun search-result-markdown-to-html (item)
1900   (cons (cons :html-body
1901               (handler-case (nth-value 1 (cl-markdown:markdown (cdr (assoc :body item)) :stream nil))
1902                 (serious-condition () "[Error while processing search result]")))
1903         item))
1904
1905 (define-page view-search "/search" ((q :required t))
1906   (let ((*current-search-query* q)
1907         (link (presentable-link q :search))
1908         (title (format nil "~@[~A - ~]Search" q)))
1909     (declare (special *current-search-query*))
1910     (if link
1911         (redirect link)
1912         (multiple-value-bind (tags posts comments) (lw2-search-query q)
1913           (let ((tags (map 'list (lambda (tag)
1914                                    (alist* :----typename "Tag" tag))
1915                            tags)))
1916             (view-items-index (nconc
1917                                (map 'list (lambda (post) (if (cdr (assoc :comment-count post)) post (alist* :comment-count 0 post))) posts)
1918                                (map 'list #'search-result-markdown-to-html comments))
1919                               :top-nav (lambda ()
1920                                          (page-toolbar-to-html :title title :rss t)
1921                                          (when tags
1922                                            <h1>Tags</h1>
1923                                            (tag-list-to-html tags)))
1924                               :content-class "search-results-page" :current-uri "/search"
1925                               :title title))))))
1926
1927 (define-page view-login "/login" (return cookie-check
1928                                          (login-username :request-type :post) (login-password :request-type :post)
1929                                          (signup-username :request-type :post) (signup-email :request-type :post) (signup-password :request-type :post) (signup-password2 :request-type :post))
1930   (labels
1931     ((emit-login-page (&key error-message)
1932        (let ((csrf-token (make-csrf-token)))
1933          (emit-page (out-stream :title "Log in" :current-uri "/login" :content-class "login-page" :robots "noindex, nofollow")
1934                     (when error-message
1935                       (format out-stream "<div class=\"error-box\">~A</div>" error-message))
1936                     (with-outputs (out-stream) "<div class=\"login-container\">")
1937                     (output-form out-stream "post" (format nil "/login~@[?return=~A~]" (if return (url-rewrite:url-encode return))) "login-form" "Log in" csrf-token
1938                                  '(("login-username" "Username" "text" "username")
1939                                    ("login-password" "Password" "password" "current-password"))
1940                                  "Log in"
1941                                  :end-html (when (typep *current-backend* 'backend-websocket-login) ;other backends not supported yet
1942                                              "<a href=\"/reset-password\">Forgot password</a>"))
1943                     (output-form out-stream "post" (format nil "/login~@[?return=~A~]" (if return (url-rewrite:url-encode return))) "signup-form" "Create account" csrf-token
1944                                  '(("signup-username" "Username" "text" "username")
1945                                    ("signup-email" "Email" "text" "email")
1946                                    ("signup-password" "Password" "password" "new-password")
1947                                    ("signup-password2" "Confirm password" "password" "new-password"))
1948                                  "Create account")
1949                     (when-let (main-site-title (main-site-title *current-site*))
1950                       (when (typep *current-site* 'ea-forum-viewer-site)
1951                         <div class="error-box"><span style="font-weight:bold">WARNING:</span> EA Forum recently switched to a new single sign-on system. Accounts created with the new system do not currently work with GreaterWrong.\
1952                               Accounts created before the new system and accounts created through GreaterWrong continue to work.</div>)
1953                       (format out-stream "<div class=\"login-tip\"><span>Tip:</span> You can log in with the same username and password that you use on ~A~:*. Creating an account here also creates one on ~A.</div>"
1954                               main-site-title))
1955                     (format out-stream "</div>"))))
1956      (finish-login (username user-id auth-token error-message &optional expires)
1957        (cond
1958          (auth-token
1959            (set-cookie "lw2-auth-token" auth-token :max-age (if expires (+ (- expires (get-unix-time)) (* 24 60 60)) (1- (expt 2 31))))
1960            (if expires (set-cookie "lw2-status" (json:encode-json-to-string (alist :expires expires))))
1961            (cache-put "auth-token-to-userid" auth-token user-id)
1962            (cache-put "auth-token-to-username" auth-token username)
1963            (redirect (if (and return (ppcre:scan "^/[^/]" return)) return "/")))
1964          (t
1965           (emit-login-page :error-message error-message)))))
1966     (cond
1967       ((not (or cookie-check (hunchentoot:cookie-in "session-token")))
1968         (set-cookie "session-token" (base64:usb8-array-to-base64-string (ironclad:make-random-salt)))
1969         (redirect (format nil "/login?~@[return=~A&~]cookie-check=y" (if return (url-rewrite:url-encode return)))))
1970       (cookie-check
1971         (if (hunchentoot:cookie-in "session-token")
1972             (redirect (format nil "/login~@[?return=~A~]" (if return (url-rewrite:url-encode return))))
1973             (emit-page (out-stream :title "Log in" :current-uri "/login")
1974                        (format out-stream "<h1>Enable cookies</h1><p>Please enable cookies in your browser and <a href=\"/login~@[?return=~A~]\">try again</a>.</p>" (if return (url-rewrite:url-encode return))))))
1975       (login-username
1976         (cond
1977           ((or (string= login-username "") (string= login-password "")) (emit-login-page :error-message "Please enter a username and password"))
1978           ((lw2.dnsbl:dnsbl-check (hunchentoot:real-remote-addr)) (emit-login-page :error-message "Your IP address is blacklisted."))
1979           (t (multiple-value-call #'finish-login login-username (do-login login-username login-password)))))
1980       (signup-username
1981         (cond
1982           ((not (every (lambda (x) (not (string= x ""))) (list signup-username signup-email signup-password signup-password2)))
1983            (emit-login-page :error-message "Please fill in all fields"))
1984           ((not (string= signup-password signup-password2))
1985            (emit-login-page :error-message "Passwords do not match"))
1986           ((lw2.dnsbl:dnsbl-check (hunchentoot:real-remote-addr)) (emit-login-page :error-message "Your IP address is blacklisted."))
1987           (t (multiple-value-call #'finish-login signup-username (do-lw2-create-user signup-username signup-email signup-password)))))
1988       (t
1989        (emit-login-page)))))
1990
1991 (define-page view-logout "/logout" ()
1992   (request-method
1993    (:post ()
1994      (set-cookie "lw2-auth-token" "" :max-age 0)
1995      (do-logout *current-auth-token*)
1996      (redirect "/"))))
1997
1998 (defparameter *reset-password-template* (compile-template* "reset-password.html"))
1999
2000 (define-page view-reset-password "/reset-password" ((email :request-type :post) (reset-link :request-type :post) (password :request-type :post) (password2 :request-type :post))
2001   (labels ((emit-rpw-page (&key message message-type step)
2002              (let ((csrf-token (make-csrf-token)))
2003                (emit-page (out-stream :title "Reset password" :content-class "reset-password" :robots "noindex, nofollow")
2004                           (render-template* *reset-password-template* out-stream
2005                                             :csrf-token csrf-token
2006                                             :reset-link reset-link
2007                                             :message message
2008                                             :message-type message-type
2009                                             :step step)))))
2010     (cond
2011       (email
2012         (multiple-value-bind (ret error)
2013           (do-lw2-forgot-password email)
2014           (declare (ignore ret))
2015           (if error
2016               (emit-rpw-page :step 1 :message error :message-type "error")
2017               (emit-rpw-page :step 1 :message "Password reset email sent." :message-type "success"))))
2018       (reset-link
2019         (ppcre:register-groups-bind (reset-token) ("(?:reset-password/|^)([^/#]+)$" reset-link)
2020                                     (cond
2021                                       ((not reset-token)
2022                                        (emit-rpw-page :step 2 :message "Invalid password reset link." :message-type "error"))
2023                                       ((not (string= password password2))
2024                                        (emit-rpw-page :step 2 :message "Passwords do not match." :message-type "error"))
2025                                       (t
2026                                        (multiple-value-bind (user-id auth-token error-message) (do-lw2-reset-password reset-token password)
2027                                          (declare (ignore user-id auth-token))
2028                                          (cond
2029                                            (error-message (emit-rpw-page :step 2 :message error-message :message-type "error"))
2030                                            (t
2031                                             (with-error-page (emit-page (out-stream :title "Reset password" :content-class "reset-password")
2032                                                                         (format out-stream "<h1>Password reset complete</h1><p>You can now <a href=\"/login\">log in</a> with your new password.</p>"))))))))))
2033       (t
2034        (emit-rpw-page)))))
2035
2036 (define-page view-library "/library"
2037                             ((view :member '(:featured :community) :default :featured))
2038   (let ((sequences
2039          (lw2-graphql-query
2040           (lw2-query-string :sequence :list
2041                             (alist :view (case view
2042                                            (:featured "curatedSequences")
2043                                            (:community "communitySequences")))
2044                             :fields '(:--id :created-at :user-id :title :----typename)))))
2045     (view-items-index
2046      sequences
2047      :title "Sequences Library"
2048      :content-class "sequences-page"
2049      :current-uri "/library"
2050      :top-nav (lambda ()
2051                 (sublevel-nav-to-html '(:featured :community)
2052                                       view
2053                                       :default :featured
2054                                       :param-name "view"
2055                                       :extra-class "sequences-view")))))
2056
2057 (define-page view-sequence (:regex "^/s(?:equences)?/([^/?#]+)(?:/?$|\\?)" sequence-id) ()
2058   (let ((sequence (get-sequence sequence-id)))
2059     (alist-bind ((title string))
2060                 sequence
2061       (emit-page (out-stream
2062                   :title title
2063                   :content-class "sequence-page")
2064                  (sequence-to-html sequence)))))
2065
2066 (define-component view-collection (collection-id) ()
2067                   (let ((collection (get-collection collection-id)))
2068                     (renderer ()
2069                               (emit-page (out-stream :title (cdr (assoc :title collection)))
2070                                          (contents-to-html (collection-to-contents collection) 1 out-stream)
2071                                          (collection-to-html collection)))))
2072
2073 (define-component-routes lesswrong-viewer-site (view-sequences (standard-route :uri "/sequences") () (view-collection "oneQyj4pw77ynzwAF")))
2074 (define-component-routes lesswrong-viewer-site (view-codex (standard-route :uri "/codex") () (view-collection "2izXHCrmJ684AnZ5X")))
2075 (define-component-routes lesswrong-viewer-site (view-hpmor (standard-route :uri "/hpmor") () (view-collection "ywQvGBSojSQZTMpLh")))
2076 (define-component-routes ea-forum-viewer-site (view-handbook (standard-route :uri "/handbook") () (view-collection "MobebwWs2o86cS9Rd")))
2077
2078 (define-component-routes forum-site (view-tags-index (standard-route :uri "/tags") () (view-tags-index)))
2079
2080 (define-page view-archive (:regex "^/archive(?:/(\\d{4})|/?(?:$|\\?.*$))(?:/(\\d{1,2})|/?(?:$|\\?.*$))(?:/(\\d{1,2})|/?(?:$|\\?.*$))"
2081                            (year :type (mod 10000))
2082                            (month :type (integer 1 12))
2083                            (day :type (integer 1 31)))
2084              ((offset :type fixnum :default 0))
2085   (local-time:with-decoded-timestamp (:day current-day :month current-month :year current-year :timezone local-time:+utc-zone+) (local-time:now)
2086     (local-time:with-decoded-timestamp (:day earliest-day :month earliest-month :year earliest-year :timezone local-time:+utc-zone+) (earliest-post-time)
2087       (labels ((url-elements (&rest url-elements)
2088                  (declare (dynamic-extent url-elements))
2089                  (format nil "/~{~A~^/~}" url-elements))
2090                (archive-nav ()
2091                  (let ((out-stream *html-output*))
2092                    (with-outputs (out-stream) "<div class=\"archive-nav\"><div class=\"archive-nav-years\">")
2093                    (link-if-not out-stream (not (or year month day)) (url-elements "archive") "archive-nav-item-year" "All")
2094                    (loop for y from earliest-year to current-year
2095                       do (link-if-not out-stream (eq y year) (url-elements "archive" y) "archive-nav-item-year" y))
2096                    (format out-stream "</div>")
2097                    (when year
2098                      (format out-stream "<div class=\"archive-nav-months\">")
2099                      (link-if-not out-stream (not month) (url-elements "archive" year) "archive-nav-item-month" "All")
2100                      (loop for m from (if (= (or year current-year) earliest-year) earliest-month 1) to (if (= (or year current-year) current-year) current-month 12)
2101                         do (link-if-not out-stream (eq m month) (url-elements "archive" (or year current-year) m) "archive-nav-item-month" (elt local-time:+short-month-names+ m)))
2102                      (format out-stream "</div>"))
2103                    (when month
2104                      (format out-stream "<div class=\"archive-nav-days\">")
2105                      (link-if-not out-stream (not day) (url-elements "archive" year month) "archive-nav-item-day" "All")
2106                      (loop for d from (if (and (= (or year current-year) earliest-year) (= (or month current-month) earliest-month)) earliest-day 1)
2107                         to (if (and (= (or year current-year) current-year) (= (or month current-month) current-month)) current-day (local-time:days-in-month (or month current-month) (or year current-year)))
2108                         do (link-if-not out-stream (eq d day) (url-elements "archive" (or year current-year) (or month current-month) d) "archive-nav-item-day" d))
2109                      (format out-stream "</div>"))
2110                    (format out-stream "</div>"))))
2111         (multiple-value-bind (posts total)
2112           (lw2-graphql-query (lw2-query-string :post :list
2113                                                (alist :view (if day "new" "top") :limit 51 :offset offset
2114                                                       :after (if (and year (not day)) (format nil "~A-~A-~A" (or year earliest-year) (or month 1) (or day 1)))
2115                                                       :before (if year (format nil "~A-~A-~A" (or year current-year) (or month 12)
2116                                                                                (or day (local-time:days-in-month (or month 12) (or year current-year))))))))
2117           (emit-page (out-stream :title "Archive" :current-uri "/archive" :content-class "archive-page"
2118                                  :top-nav #'archive-nav
2119                                  :pagination (pagination-nav-bars :items-per-page 50 :offset offset :total total :with-next (if total nil (> (length posts) 50))))
2120                      (write-index-items-to-html out-stream (firstn posts 50) :empty-message "No posts for the selected period.")))))))
2121
2122 (define-page view-about "/about" ()
2123   (emit-page (out-stream :title "About" :current-uri "/about" :content-class "about-page")
2124              (alexandria:with-input-from-file (in-stream "www/about.html" :element-type '(unsigned-byte 8))
2125                                               (alexandria:copy-stream in-stream out-stream))))
2126
2127 (define-page misc-pages (:regex "^/misc-pages/.+") ()
2128   (let ((pathname (hunchentoot:request-pathname)))
2129     (unless (probe-file pathname)
2130       (error 'lw2-not-found-error))
2131     (emit-page (out-stream :title "Misc page" :content-class "misc-page")
2132                (alexandria:with-input-from-file (in-stream pathname :element-type '(unsigned-byte 8))
2133                  (alexandria:copy-stream in-stream out-stream)))))
2134
2135 (define-page view-generated-script (:regex "^/generated/([^/]+)\\.js" (name :type string)) ()
2136   (when-let ((package (find-package (string-upcase name))))
2137     (setf (hunchentoot:header-out "Content-Type") "text/javascript")
2138     (let ((stream (make-flexi-stream (hunchentoot:send-headers) :external-format :utf-8)))
2139       (write-package-client-scripts package stream))))
2140
2141 (hunchentoot:define-easy-handler
2142     (view-proxy-asset
2143      :uri (lambda (r)
2144             (with-error-page
2145               (multiple-value-bind (match? strings) (ppcre:scan-to-strings "^/proxy-assets/([0-9A-Za-z]+)(-inverted)?$" (hunchentoot:script-name r) :sharedp t)
2146                 (when-let* ((base-filename (and match? (svref strings 0)))
2147                             (image-data (cache-get "cached-images" base-filename :value-type :json)))
2148                   (let ((inverted (svref strings 1)))
2149                     (alist-bind ((mime-type simple-string)) image-data
2150                       (setf (hunchentoot:header-out "X-Content-Type-Options") "nosniff"
2151                             (hunchentoot:header-out "Cache-Control") #.(format nil "public, max-age=~A, immutable" 600))
2152                       (hunchentoot:handle-static-file (concatenate 'string "www/proxy-assets/" base-filename (if inverted "-inverted" "")) mime-type)
2153                       t)))))))
2154     nil)