mod/page/lib.php

   1 <?php
   2
   3 // This file is part of Moodle - http://moodle.org/
   4 //
   5 // Moodle is free software: you can redistribute it and/or modify
   6 // it under the terms of the GNU General Public License as published by
   7 // the Free Software Foundation, either version 3 of the License, or
   8 // (at your option) any later version.
   9 //
  10 // Moodle is distributed in the hope that it will be useful,
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 // GNU General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 /**
  19  * @package    mod
  20  * @subpackage page
  21  * @copyright  2009 Petr Skoda (http://skodak.org)
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 defined('MOODLE_INTERNAL') || die;
  26
  27 /**
  28  * List of features supported in Page module
  29  * @param string $feature FEATURE_xx constant for requested feature
  30  * @return mixed True if module supports feature, false if not, null if doesn't know
  31  */
  32 function page_supports($feature) {
  33     switch($feature) {
  34         case FEATURE_MOD_ARCHETYPE:           return MOD_ARCHETYPE_RESOURCE;
  35         case FEATURE_GROUPS:                  return false;
  36         case FEATURE_GROUPINGS:               return false;
  37         case FEATURE_GROUPMEMBERSONLY:        return true;
  38         case FEATURE_MOD_INTRO:               return true;
  39         case FEATURE_COMPLETION_TRACKS_VIEWS: return true;
  40         case FEATURE_GRADE_HAS_GRADE:         return false;
  41         case FEATURE_GRADE_OUTCOMES:          return false;
  42         case FEATURE_BACKUP_MOODLE2:          return true;
  43         case FEATURE_SHOW_DESCRIPTION:        return true;
  44
  45         default: return null;
  46     }
  47 }
  48
  49 /**
  50  * Returns all other caps used in module
  51  * @return array
  52  */
  53 function page_get_extra_capabilities() {
  54     return array('moodle/site:accessallgroups');
  55 }
  56
  57 /**
  58  * This function is used by the reset_course_userdata function in moodlelib.
  59  * @param $data the data submitted from the reset course.
  60  * @return array status array
  61  */
  62 function page_reset_userdata($data) {
  63     return array();
  64 }
  65
  66 /**
  67  * List of view style log actions
  68  * @return array
  69  */
  70 function page_get_view_actions() {
  71     return array('view','view all');
  72 }
  73
  74 /**
  75  * List of update style log actions
  76  * @return array
  77  */
  78 function page_get_post_actions() {
  79     return array('update', 'add');
  80 }
  81
  82 /**
  83  * Add page instance.
  84  * @param stdClass $data
  85  * @param mod_page_mod_form $mform
  86  * @return int new page instance id
  87  */
  88 function page_add_instance($data, $mform = null) {
  89     global $CFG, $DB;
  90     require_once("$CFG->libdir/resourcelib.php");
  91
  92     $cmid = $data->coursemodule;
  93
  94     $data->timemodified = time();
  95     $displayoptions = array();
  96     if ($data->display == RESOURCELIB_DISPLAY_POPUP) {
  97         $displayoptions['popupwidth']  = $data->popupwidth;
  98         $displayoptions['popupheight'] = $data->popupheight;
  99     }
 100     $displayoptions['printheading'] = $data->printheading;
 101     $displayoptions['printintro']   = $data->printintro;
 102     $data->displayoptions = serialize($displayoptions);
 103
 104     if ($mform) {
 105         $data->content       = $data->page['text'];
 106         $data->contentformat = $data->page['format'];
 107     }
 108
 109     $data->id = $DB->insert_record('page', $data);
 110
 111     // we need to use context now, so we need to make sure all needed info is already in db
 112     $DB->set_field('course_modules', 'instance', $data->id, array('id'=>$cmid));
 113     $context = get_context_instance(CONTEXT_MODULE, $cmid);
 114
 115     if ($mform and !empty($data->page['itemid'])) {
 116         $draftitemid = $data->page['itemid'];
 117         $data->content = file_save_draft_area_files($draftitemid, $context->id, 'mod_page', 'content', 0, page_get_editor_options($context), $data->content);
 118         $DB->update_record('page', $data);
 119     }
 120
 121     return $data->id;
 122 }
 123
 124 /**
 125  * Update page instance.
 126  * @param object $data
 127  * @param object $mform
 128  * @return bool true
 129  */
 130 function page_update_instance($data, $mform) {
 131     global $CFG, $DB;
 132     require_once("$CFG->libdir/resourcelib.php");
 133
 134     $cmid        = $data->coursemodule;
 135     $draftitemid = $data->page['itemid'];
 136
 137     $data->timemodified = time();
 138     $data->id           = $data->instance;
 139     $data->revision++;
 140
 141     $displayoptions = array();
 142     if ($data->display == RESOURCELIB_DISPLAY_POPUP) {
 143         $displayoptions['popupwidth']  = $data->popupwidth;
 144         $displayoptions['popupheight'] = $data->popupheight;
 145     }
 146     $displayoptions['printheading'] = $data->printheading;
 147     $displayoptions['printintro']   = $data->printintro;
 148     $data->displayoptions = serialize($displayoptions);
 149
 150     $data->content       = $data->page['text'];
 151     $data->contentformat = $data->page['format'];
 152
 153     $DB->update_record('page', $data);
 154
 155     $context = get_context_instance(CONTEXT_MODULE, $cmid);
 156     if ($draftitemid) {
 157         $data->content = file_save_draft_area_files($draftitemid, $context->id, 'mod_page', 'content', 0, page_get_editor_options($context), $data->content);
 158         $DB->update_record('page', $data);
 159     }
 160
 161     return true;
 162 }
 163
 164 /**
 165  * Delete page instance.
 166  * @param int $id
 167  * @return bool true
 168  */
 169 function page_delete_instance($id) {
 170     global $DB;
 171
 172     if (!$page = $DB->get_record('page', array('id'=>$id))) {
 173         return false;
 174     }
 175
 176     // note: all context files are deleted automatically
 177
 178     $DB->delete_records('page', array('id'=>$page->id));
 179
 180     return true;
 181 }
 182
 183 /**
 184  * Return use outline
 185  * @param object $course
 186  * @param object $user
 187  * @param object $mod
 188  * @param object $page
 189  * @return object|null
 190  */
 191 function page_user_outline($course, $user, $mod, $page) {
 192     global $DB;
 193
 194     if ($logs = $DB->get_records('log', array('userid'=>$user->id, 'module'=>'page',
 195                                               'action'=>'view', 'info'=>$page->id), 'time ASC')) {
 196
 197         $numviews = count($logs);
 198         $lastlog = array_pop($logs);
 199
 200         $result = new stdClass();
 201         $result->info = get_string('numviews', '', $numviews);
 202         $result->time = $lastlog->time;
 203
 204         return $result;
 205     }
 206     return NULL;
 207 }
 208
 209 /**
 210  * Return use complete
 211  * @param object $course
 212  * @param object $user
 213  * @param object $mod
 214  * @param object $page
 215  */
 216 function page_user_complete($course, $user, $mod, $page) {
 217     global $CFG, $DB;
 218
 219     if ($logs = $DB->get_records('log', array('userid'=>$user->id, 'module'=>'page',
 220                                               'action'=>'view', 'info'=>$page->id), 'time ASC')) {
 221         $numviews = count($logs);
 222         $lastlog = array_pop($logs);
 223
 224         $strmostrecently = get_string('mostrecently');
 225         $strnumviews = get_string('numviews', '', $numviews);
 226
 227         echo "$strnumviews - $strmostrecently ".userdate($lastlog->time);
 228
 229     } else {
 230         print_string('neverseen', 'page');
 231     }
 232 }
 233
 234 /**
 235  * Given a course_module object, this function returns any
 236  * "extra" information that may be needed when printing
 237  * this activity in a course listing.
 238  *
 239  * See {@link get_array_of_activities()} in course/lib.php
 240  *
 241  * @param cm_info $coursemodule
 242  * @return cached_cm_info Info to customise main page display
 243  */
 244 function page_get_coursemodule_info($coursemodule) {
 245     global $CFG, $DB;
 246     require_once("$CFG->libdir/resourcelib.php");
 247
 248     if (!$page = $DB->get_record('page', array('id'=>$coursemodule->instance),
 249             'id, name, display, displayoptions, intro, introformat')) {
 250         return NULL;
 251     }
 252
 253     $info = new cached_cm_info();
 254     $info->name = $page->name;
 255
 256     if ($coursemodule->showdescription) {
 257         // Convert intro to html. Do not filter cached version, filters run at display time.
 258         $info->content = format_module_intro('page', $page, $coursemodule->id, false);
 259     }
 260
 261     if ($page->display != RESOURCELIB_DISPLAY_POPUP) {
 262         return $info;
 263     }
 264
 265     $fullurl = "$CFG->wwwroot/mod/page/view.php?id=$coursemodule->id&amp;inpopup=1";
 266     $options = empty($page->displayoptions) ? array() : unserialize($page->displayoptions);
 267     $width  = empty($options['popupwidth'])  ? 620 : $options['popupwidth'];
 268     $height = empty($options['popupheight']) ? 450 : $options['popupheight'];
 269     $wh = "width=$width,height=$height,toolbar=no,location=no,menubar=no,copyhistory=no,status=no,directories=no,scrollbars=yes,resizable=yes";
 270     $info->onclick = "window.open('$fullurl', '', '$wh'); return false;";
 271
 272     return $info;
 273 }
 274
 275
 276 /**
 277  * Lists all browsable file areas
 278  *
 279  * @package  mod_page
 280  * @category files
 281  * @param stdClass $course course object
 282  * @param stdClass $cm course module object
 283  * @param stdClass $context context object
 284  * @return array
 285  */
 286 function page_get_file_areas($course, $cm, $context) {
 287     $areas = array();
 288     $areas['content'] = get_string('content', 'page');
 289     return $areas;
 290 }
 291
 292 /**
 293  * File browsing support for page module content area.
 294  *
 295  * @package  mod_page
 296  * @category files
 297  * @param stdClass $browser file browser instance
 298  * @param stdClass $areas file areas
 299  * @param stdClass $course course object
 300  * @param stdClass $cm course module object
 301  * @param stdClass $context context object
 302  * @param string $filearea file area
 303  * @param int $itemid item ID
 304  * @param string $filepath file path
 305  * @param string $filename file name
 306  * @return file_info instance or null if not found
 307  */
 308 function page_get_file_info($browser, $areas, $course, $cm, $context, $filearea, $itemid, $filepath, $filename) {
 309     global $CFG;
 310
 311     if (!has_capability('moodle/course:managefiles', $context)) {
 312         // students can not peak here!
 313         return null;
 314     }
 315
 316     $fs = get_file_storage();
 317
 318     if ($filearea === 'content') {
 319         $filepath = is_null($filepath) ? '/' : $filepath;
 320         $filename = is_null($filename) ? '.' : $filename;
 321
 322         $urlbase = $CFG->wwwroot.'/pluginfile.php';
 323         if (!$storedfile = $fs->get_file($context->id, 'mod_page', 'content', 0, $filepath, $filename)) {
 324             if ($filepath === '/' and $filename === '.') {
 325                 $storedfile = new virtual_root_file($context->id, 'mod_page', 'content', 0);
 326             } else {
 327                 // not found
 328                 return null;
 329             }
 330         }
 331         require_once("$CFG->dirroot/mod/page/locallib.php");
 332         return new page_content_file_info($browser, $context, $storedfile, $urlbase, $areas[$filearea], true, true, true, false);
 333     }
 334
 335     // note: page_intro handled in file_browser automatically
 336
 337     return null;
 338 }
 339
 340 /**
 341  * Serves the page files.
 342  *
 343  * @package  mod_page
 344  * @category files
 345  * @param stdClass $course course object
 346  * @param stdClass $cm course module object
 347  * @param stdClass $context context object
 348  * @param string $filearea file area
 349  * @param array $args extra arguments
 350  * @param bool $forcedownload whether or not force download
 351  * @param array $options additional options affecting the file serving
 352  * @return bool false if file not found, does not return if found - just send the file
 353  */
 354 function page_pluginfile($course, $cm, $context, $filearea, $args, $forcedownload, array $options=array()) {
 355     global $CFG, $DB;
 356     require_once("$CFG->libdir/resourcelib.php");
 357
 358     if ($context->contextlevel != CONTEXT_MODULE) {
 359         return false;
 360     }
 361
 362     require_course_login($course, true, $cm);
 363     if (!has_capability('mod/page:view', $context)) {
 364         return false;
 365     }
 366
 367     if ($filearea !== 'content') {
 368         // intro is handled automatically in pluginfile.php
 369         return false;
 370     }
 371
 372     // $arg could be revision number or index.html
 373     $arg = array_shift($args);
 374     if ($arg == 'index.html' || $arg == 'index.htm') {
 375         // serve page content
 376         $filename = $arg;
 377
 378         if (!$page = $DB->get_record('page', array('id'=>$cm->instance), '*', MUST_EXIST)) {
 379             return false;
 380         }
 381
 382         // remove @@PLUGINFILE@@/
 383         $content = str_replace('@@PLUGINFILE@@/', '', $page->content);
 384
 385         $formatoptions = new stdClass;
 386         $formatoptions->noclean = true;
 387         $formatoptions->overflowdiv = true;
 388         $formatoptions->context = $context;
 389         $content = format_text($content, $page->contentformat, $formatoptions);
 390
 391         send_file($content, $filename, 0, 0, true, true);
 392     } else {
 393         $fs = get_file_storage();
 394         $relativepath = implode('/', $args);
 395         $fullpath = "/$context->id/mod_page/$filearea/0/$relativepath";
 396         if (!$file = $fs->get_file_by_hash(sha1($fullpath)) or $file->is_directory()) {
 397             $page = $DB->get_record('page', array('id'=>$cm->instance), 'id, legacyfiles', MUST_EXIST);
 398             if ($page->legacyfiles != RESOURCELIB_LEGACYFILES_ACTIVE) {
 399                 return false;
 400             }
 401             if (!$file = resourcelib_try_file_migration('/'.$relativepath, $cm->id, $cm->course, 'mod_page', 'content', 0)) {
 402                 return false;
 403             }
 404             //file migrate - update flag
 405             $page->legacyfileslast = time();
 406             $DB->update_record('page', $page);
 407         }
 408
 409         // finally send the file
 410         send_stored_file($file, 86400, 0, $forcedownload, $options);
 411     }
 412 }
 413
 414 /**
 415  * Return a list of page types
 416  * @param string $pagetype current page type
 417  * @param stdClass $parentcontext Block's parent context
 418  * @param stdClass $currentcontext Current context of block
 419  */
 420 function page_page_type_list($pagetype, $parentcontext, $currentcontext) {
 421     $module_pagetype = array('mod-page-*'=>get_string('page-mod-page-x', 'page'));
 422     return $module_pagetype;
 423 }
 424
 425 /**
 426  * Export page resource contents
 427  *
 428  * @return array of file content
 429  */
 430 function page_export_contents($cm, $baseurl) {
 431     global $CFG, $DB;
 432     $contents = array();
 433     $context = get_context_instance(CONTEXT_MODULE, $cm->id);
 434
 435     $page = $DB->get_record('page', array('id'=>$cm->instance), '*', MUST_EXIST);
 436
 437     // page contents
 438     $fs = get_file_storage();
 439     $files = $fs->get_area_files($context->id, 'mod_page', 'content', 0, 'sortorder DESC, id ASC', false);
 440     foreach ($files as $fileinfo) {
 441         $file = array();
 442         $file['type']         = 'file';
 443         $file['filename']     = $fileinfo->get_filename();
 444         $file['filepath']     = $fileinfo->get_filepath();
 445         $file['filesize']     = $fileinfo->get_filesize();
 446         $file['fileurl']      = file_encode_url("$CFG->wwwroot/" . $baseurl, '/'.$context->id.'/mod_page/content/'.$page->revision.$fileinfo->get_filepath().$fileinfo->get_filename(), true);
 447         $file['timecreated']  = $fileinfo->get_timecreated();
 448         $file['timemodified'] = $fileinfo->get_timemodified();
 449         $file['sortorder']    = $fileinfo->get_sortorder();
 450         $file['userid']       = $fileinfo->get_userid();
 451         $file['author']       = $fileinfo->get_author();
 452         $file['license']      = $fileinfo->get_license();
 453         $contents[] = $file;
 454     }
 455
 456     // page html conent
 457     $filename = 'index.html';
 458     $pagefile = array();
 459     $pagefile['type']         = 'file';
 460     $pagefile['filename']     = $filename;
 461     $pagefile['filepath']     = '/';
 462     $pagefile['filesize']     = 0;
 463     $pagefile['fileurl']      = file_encode_url("$CFG->wwwroot/" . $baseurl, '/'.$context->id.'/mod_page/content/' . $filename, true);
 464     $pagefile['timecreated']  = null;
 465     $pagefile['timemodified'] = $page->timemodified;
 466     // make this file as main file
 467     $pagefile['sortorder']    = 1;
 468     $pagefile['userid']       = null;
 469     $pagefile['author']       = null;
 470     $pagefile['license']      = null;
 471     $contents[] = $pagefile;
 472
 473     return $contents;
 474 }
 475
 476 /**
 477  * Register the ability to handle drag and drop file uploads
 478  * @return array containing details of the files / types the mod can handle
 479  */
 480 function page_dndupload_register() {
 481     return array('types' => array(
 482                      array('identifier' => 'text/html', 'message' => get_string('createpage', 'page')),
 483                      array('identifier' => 'text', 'message' => get_string('createpage', 'page'))
 484                  ));
 485 }
 486
 487 /**
 488  * Handle a file that has been uploaded
 489  * @param object $uploadinfo details of the file / content that has been uploaded
 490  * @return int instance id of the newly created mod
 491  */
 492 function page_dndupload_handle($uploadinfo) {
 493     // Gather the required info.
 494     $data = new stdClass();
 495     $data->course = $uploadinfo->course->id;
 496     $data->name = $uploadinfo->displayname;
 497     $data->intro = '<p>'.$uploadinfo->displayname.'</p>';
 498     $data->introformat = FORMAT_HTML;
 499     if ($uploadinfo->type == 'text/html') {
 500         $data->contentformat = FORMAT_HTML;
 501         $data->content = clean_param($uploadinfo->content, PARAM_CLEANHTML);
 502     } else {
 503         $data->contentformat = FORMAT_PLAIN;
 504         $data->content = clean_param($uploadinfo->content, PARAM_TEXT);
 505     }
 506     $data->coursemodule = $uploadinfo->coursemodule;
 507
 508     // Set the display options to the site defaults.
 509     $config = get_config('page');
 510     $data->display = $config->display;
 511     $data->popupheight = $config->popupheight;
 512     $data->popupwidth = $config->popupwidth;
 513     $data->printheading = $config->printheading;
 514     $data->printintro = $config->printintro;
 515
 516     return page_add_instance($data, null);
 517 }