blog/index.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 /**
  18  * file index.php
  19  * index page to view blogs. if no blog is specified then site wide entries are shown
  20  * if a blog id is specified then the latest entries from that blog are shown
  21  */
  22
  23 require_once(__DIR__ . '/../config.php');
  24 require_once($CFG->dirroot .'/blog/lib.php');
  25 require_once($CFG->dirroot .'/blog/locallib.php');
  26 require_once($CFG->dirroot .'/course/lib.php');
  27 require_once($CFG->dirroot .'/comment/lib.php');
  28
  29 $id       = optional_param('id', null, PARAM_INT);
  30 $start    = optional_param('formstart', 0, PARAM_INT);
  31 $tag      = optional_param('tag', '', PARAM_NOTAGS);
  32 $userid   = optional_param('userid', null, PARAM_INT);
  33 $tagid    = optional_param('tagid', null, PARAM_INT);
  34 $modid    = optional_param('modid', null, PARAM_INT);
  35 $entryid  = optional_param('entryid', null, PARAM_INT);
  36 $groupid  = optional_param('groupid', null, PARAM_INT);
  37 $courseid = optional_param('courseid', null, PARAM_INT);
  38 $search   = optional_param('search', null, PARAM_RAW);
  39
  40 comment::init();
  41
  42 $urlparams = compact('id', 'start', 'tag', 'userid', 'tagid', 'modid', 'entryid', 'groupid', 'courseid', 'search');
  43 foreach ($urlparams as $var => $val) {
  44     if (empty($val)) {
  45         unset($urlparams[$var]);
  46     }
  47 }
  48 $PAGE->set_url('/blog/index.php', $urlparams);
  49
  50 // Correct tagid if a text tag is provided as a param.
  51 if (!empty($tag)) {
  52     if ($tagrec = $DB->get_record('tag', array('name' => $tag))) {
  53         $tagid = $tagrec->id;
  54     } else {
  55         unset($tagid);
  56     }
  57 }
  58
  59 // Set the userid to the entry author if we have the entry ID.
  60 if ($entryid and !isset($userid)) {
  61     $entry = new blog_entry($entryid);
  62     $userid = $entry->userid;
  63 }
  64
  65 if (isset($userid) && empty($courseid) && empty($modid)) {
  66     $context = context_user::instance($userid);
  67 } else if (!empty($courseid) && $courseid != SITEID) {
  68     $context = context_course::instance($courseid);
  69 } else {
  70     $context = context_system::instance();
  71 }
  72 $PAGE->set_context($context);
  73
  74 $sitecontext = context_system::instance();
  75
  76 if (isset($userid) && $USER->id == $userid) {
  77     $blognode = $PAGE->navigation->find('siteblog', null);
  78     if ($blognode) {
  79         $blognode->make_inactive();
  80     }
  81 }
  82
  83 // Check basic permissions.
  84 if ($CFG->bloglevel == BLOG_GLOBAL_LEVEL) {
  85     // Everybody can see anything - no login required unless site is locked down using forcelogin.
  86     if ($CFG->forcelogin) {
  87         require_login();
  88     }
  89
  90 } else if ($CFG->bloglevel == BLOG_SITE_LEVEL) {
  91     // Users must log in and can not be guests.
  92     require_login();
  93     if (isguestuser()) {
  94         // They must have entered the url manually.
  95         print_error('blogdisable', 'blog');
  96     }
  97
  98 } else if ($CFG->bloglevel == BLOG_USER_LEVEL) {
  99     // Users can see own blogs only! with the exception of people with special cap.
 100     require_login();
 101
 102 } else {
 103     // Weird!
 104     print_error('blogdisable', 'blog');
 105 }
 106
 107 if (empty($CFG->enableblogs)) {
 108     print_error('blogdisable', 'blog');
 109 }
 110
 111 // Add courseid if modid or groupid is specified: This is used for navigation and title.
 112 if (!empty($modid) && empty($courseid)) {
 113     $courseid = $DB->get_field('course_modules', 'course', array('id' => $modid));
 114 }
 115
 116 if (!empty($groupid) && empty($courseid)) {
 117     $courseid = $DB->get_field('groups', 'courseid', array('id' => $groupid));
 118 }
 119
 120
 121 if (!$userid && has_capability('moodle/blog:view', $sitecontext) && $CFG->bloglevel > BLOG_USER_LEVEL) {
 122     if ($entryid) {
 123         if (!$entryobject = $DB->get_record('post', array('id' => $entryid))) {
 124             print_error('nosuchentry', 'blog');
 125         }
 126         $userid = $entryobject->userid;
 127     }
 128 } else if (!$userid) {
 129     $userid = $USER->id;
 130 }
 131
 132 if (!empty($modid)) {
 133     if ($CFG->bloglevel < BLOG_SITE_LEVEL) {
 134         print_error(get_string('nocourseblogs', 'blog'));
 135     }
 136     if (!$mod = $DB->get_record('course_modules', array('id' => $modid))) {
 137         print_error(get_string('invalidmodid', 'blog'));
 138     }
 139     $courseid = $mod->course;
 140 }
 141
 142 if ((empty($courseid) ? true : $courseid == SITEID) && empty($userid)) {
 143     if ($CFG->bloglevel < BLOG_SITE_LEVEL) {
 144         print_error('siteblogdisable', 'blog');
 145     }
 146     if (!has_capability('moodle/blog:view', $sitecontext)) {
 147         print_error('cannotviewsiteblog', 'blog');
 148     }
 149
 150     $COURSE = $DB->get_record('course', array('format' => 'site'));
 151     $courseid = $COURSE->id;
 152 }
 153
 154 if (!empty($courseid)) {
 155     if (!$course = $DB->get_record('course', array('id' => $courseid))) {
 156         print_error('invalidcourseid');
 157     }
 158
 159     $courseid = $course->id;
 160     require_login($course);
 161
 162     if (!has_capability('moodle/blog:view', $sitecontext)) {
 163         print_error('cannotviewcourseblog', 'blog');
 164     }
 165 } else {
 166     $coursecontext = context_course::instance(SITEID);
 167 }
 168
 169 if (!empty($groupid)) {
 170     if ($CFG->bloglevel < BLOG_SITE_LEVEL) {
 171         print_error('groupblogdisable', 'blog');
 172     }
 173
 174     if (! $group = groups_get_group($groupid)) {
 175         print_error(get_string('invalidgroupid', 'blog'));
 176     }
 177
 178     if (!$course = $DB->get_record('course', array('id' => $group->courseid))) {
 179         print_error('invalidcourseid');
 180     }
 181
 182     $coursecontext = context_course::instance($course->id);
 183     $courseid = $course->id;
 184     require_login($course);
 185
 186     if (!has_capability('moodle/blog:view', $sitecontext)) {
 187         print_error(get_string('cannotviewcourseorgroupblog', 'blog'));
 188     }
 189
 190     if (groups_get_course_groupmode($course) == SEPARATEGROUPS && !has_capability('moodle/site:accessallgroups', $coursecontext)) {
 191         if (!groups_is_member($groupid)) {
 192             print_error('notmemberofgroup');
 193         }
 194     }
 195 }
 196
 197 if (!empty($userid)) {
 198     if ($CFG->bloglevel < BLOG_USER_LEVEL) {
 199         print_error('blogdisable', 'blog');
 200     }
 201
 202     if (!$user = $DB->get_record('user', array('id' => $userid))) {
 203         print_error('invaliduserid');
 204     }
 205
 206     if ($user->deleted) {
 207         echo $OUTPUT->header();
 208         echo $OUTPUT->heading(get_string('userdeleted'));
 209         echo $OUTPUT->footer();
 210         die;
 211     }
 212
 213     if ($USER->id == $userid) {
 214         if (!has_capability('moodle/blog:create', $sitecontext)
 215           && !has_capability('moodle/blog:view', $sitecontext)) {
 216             print_error('donothaveblog', 'blog');
 217         }
 218     } else {
 219         if (!has_capability('moodle/blog:view', $sitecontext) || !blog_user_can_view_user_entry($userid)) {
 220             print_error('cannotviewcourseblog', 'blog');
 221         }
 222
 223         $PAGE->navigation->extend_for_user($user);
 224     }
 225 }
 226
 227 $courseid = (empty($courseid)) ? SITEID : $courseid;
 228
 229
 230 $blogheaders = blog_get_headers();
 231
 232 if ($CFG->enablerssfeeds) {
 233     $rsscontext = null;
 234     $filtertype = null;
 235     $thingid = null;
 236     list($thingid, $rsscontext, $filtertype) = blog_rss_get_params($blogheaders['filters']);
 237     if (empty($rsscontext)) {
 238         $rsscontext = context_system::instance();
 239     }
 240     $rsstitle = $blogheaders['heading'];
 241
 242     // Check we haven't started output by outputting an error message.
 243     if ($PAGE->state == moodle_page::STATE_BEFORE_HEADER) {
 244         blog_rss_add_http_header($rsscontext, $rsstitle, $filtertype, $thingid, $tagid);
 245     }
 246 }
 247
 248 $usernode = $PAGE->navigation->find('user'.$userid, null);
 249 if ($usernode && $courseid != SITEID) {
 250     $courseblogsnode = $PAGE->navigation->find('courseblogs', null);
 251     if ($courseblogsnode) {
 252         $courseblogsnode->remove();
 253     }
 254     $blogurl = new moodle_url($PAGE->url);
 255     $blognode = $usernode->add(get_string('blogscourse', 'blog'), $blogurl);
 256     $blognode->make_active();
 257 }
 258
 259 if ($courseid != SITEID) {
 260     $PAGE->set_heading($course->fullname);
 261     echo $OUTPUT->header();
 262     if (!empty($user)) {
 263         $headerinfo = array('heading' => fullname($user), 'user' => $user);
 264         echo $OUTPUT->context_header($headerinfo, 2);
 265     }
 266 } else if (isset($userid)) {
 267     $PAGE->set_heading(fullname($user));
 268     echo $OUTPUT->header();
 269 } else if ($courseid == SITEID) {
 270     echo $OUTPUT->header();
 271 }
 272
 273 echo $OUTPUT->heading($blogheaders['heading'], 2);
 274
 275 $bloglisting = new blog_listing($blogheaders['filters']);
 276 $bloglisting->print_entries();
 277
 278 echo $OUTPUT->footer();
 279 $eventparams = array(
 280     'other' => array('entryid' => $entryid, 'tagid' => $tagid, 'userid' => $userid, 'modid' => $modid, 'groupid' => $groupid,
 281                      'search' => $search, 'fromstart' => $start)
 282 );
 283 if (!empty($userid)) {
 284     $eventparams['relateduserid'] = $userid;
 285 }
 286 $eventparams['other']['courseid'] = ($courseid === SITEID) ? 0 : $courseid;
 287 $event = \core\event\blog_entries_viewed::create($eventparams);
 288 $event->trigger();