3 // This file is part of Moodle - http://moodle.org/
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.
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.
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/>.
19 * Core global functions for Blog.
23 * @copyright 2009 Nicolas Connault
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
27 defined('MOODLE_INTERNAL') || die();
30 * Library of functions and constants for blog
32 require_once($CFG->dirroot .'/blog/rsslib.php');
33 require_once($CFG->dirroot.'/tag/lib.php');
36 * User can edit a blog entry if this is their own blog entry and they have
37 * the capability moodle/blog:create, or if they have the capability
38 * moodle/blog:manageentries.
40 * This also applies to deleting of entries.
42 function blog_user_can_edit_entry($blogentry) {
45 $sitecontext = get_context_instance(CONTEXT_SYSTEM);
47 if (has_capability('moodle/blog:manageentries', $sitecontext)) {
48 return true; // can edit any blog entry
51 if ($blogentry->userid == $USER->id && has_capability('moodle/blog:create', $sitecontext)) {
52 return true; // can edit own when having blog:create capability
60 * Checks to see if a user can view the blogs of another user.
61 * Only blog level is checked here, the capabilities are enforced
64 function blog_user_can_view_user_entry($targetuserid, $blogentry=null) {
65 global $CFG, $USER, $DB;
67 if (empty($CFG->bloglevel)) {
68 return false; // blog system disabled
71 if (isloggedin() && $USER->id == $targetuserid) {
72 return true; // can view own entries in any case
75 $sitecontext = get_context_instance(CONTEXT_SYSTEM);
76 if (has_capability('moodle/blog:manageentries', $sitecontext)) {
77 return true; // can manage all entries
80 // coming for 1 entry, make sure it's not a draft
81 if ($blogentry && $blogentry->publishstate == 'draft' && !has_capability('moodle/blog:viewdrafts', $sitecontext)) {
82 return false; // can not view draft of others
85 // coming for 1 entry, make sure user is logged in, if not a public blog
86 if ($blogentry && $blogentry->publishstate != 'public' && !isloggedin()) {
90 switch ($CFG->bloglevel) {
91 case BLOG_GLOBAL_LEVEL:
96 if (isloggedin()) { // not logged in viewers forbidden
102 case BLOG_USER_LEVEL:
104 $personalcontext = get_context_instance(CONTEXT_USER, $targetuserid);
105 return has_capability('moodle/user:readuserblogs', $personalcontext);
112 * remove all associations for the blog entries of a particular user
113 * @param int userid - id of user whose blog associations will be deleted
115 function blog_remove_associations_for_user($userid) {
117 throw new coding_exception('function blog_remove_associations_for_user() is not finished');
119 $blogentries = blog_fetch_entries(array('user' => $userid), 'lasmodified DESC');
120 foreach ($blogentries as $entry) {
121 if (blog_user_can_edit_entry($entry)) {
122 blog_remove_associations_for_entry($entry->id);
129 * remove all associations for the blog entries of a particular course
130 * @param int courseid - id of user whose blog associations will be deleted
132 function blog_remove_associations_for_course($courseid) {
134 $context = get_context_instance(CONTEXT_COURSE, $courseid);
135 $DB->delete_records('blog_association', array('contextid' => $context->id));
139 * Given a record in the {blog_external} table, checks the blog's URL
140 * for new entries not yet copied into Moodle.
142 * @param object $externalblog
143 * @return boolean False if the Feed is invalid
145 function blog_sync_external_entries($externalblog) {
147 require_once($CFG->libdir . '/simplepie/moodle_simplepie.php');
149 $rssfile = new moodle_simplepie_file($externalblog->url);
150 $filetest = new SimplePie_Locator($rssfile);
152 if (!$filetest->is_feed($rssfile)) {
153 $externalblog->failedlastsync = 1;
154 $DB->update_record('blog_external', $externalblog);
156 } else if (!empty($externalblog->failedlastsync)) {
157 $externalblog->failedlastsync = 0;
158 $DB->update_record('blog_external', $externalblog);
161 // Delete all blog entries associated with this external blog
162 blog_delete_external_entries($externalblog);
164 $rss = new moodle_simplepie($externalblog->url);
166 if (empty($rss->data)) {
170 foreach ($rss->get_items() as $entry) {
171 // If filtertags are defined, use them to filter the entries by RSS category
172 if (!empty($externalblog->filtertags)) {
173 $containsfiltertag = false;
174 $categories = $entry->get_categories();
175 $filtertags = explode(',', $externalblog->filtertags);
176 $filtertags = array_map('trim', $filtertags);
177 $filtertags = array_map('strtolower', $filtertags);
179 foreach ($categories as $category) {
180 if (in_array(trim(strtolower($category->term)), $filtertags)) {
181 $containsfiltertag = true;
185 if (!$containsfiltertag) {
190 $newentry = new stdClass();
191 $newentry->userid = $externalblog->userid;
192 $newentry->module = 'blog_external';
193 $newentry->content = $externalblog->id;
194 $newentry->uniquehash = $entry->get_permalink();
195 $newentry->publishstate = 'site';
196 $newentry->format = FORMAT_HTML;
197 $newentry->subject = $entry->get_title();
198 $newentry->summary = $entry->get_description();
199 $newentry->created = $entry->get_date('U');
200 $newentry->lastmodified = $entry->get_date('U');
202 $id = $DB->insert_record('post', $newentry);
205 if ($tags = tag_get_tags_array('blog_external', $externalblog->id)) {
206 tag_set('post', $id, $tags);
210 $DB->update_record('blog_external', array('id' => $externalblog->id, 'timefetched' => mktime()));
214 * Given an external blog object, deletes all related blog entries from the post table.
215 * NOTE: The external blog's id is saved as post.content, a field that is not oterhwise used by blog entries.
216 * @param object $externablog
218 function blog_delete_external_entries($externalblog) {
220 require_capability('moodle/blog:manageexternal', get_context_instance(CONTEXT_SYSTEM));
221 $DB->delete_records('post', array('content' => $externalblog->id, 'module' => 'blog_external'));
225 * Returns a URL based on the context of the current page.
226 * This URL points to blog/index.php and includes filter parameters appropriate for the current page.
228 * @param stdclass $context
231 function blog_get_context_url($context=null) {
234 $viewblogentriesurl = new moodle_url('/blog/index.php');
236 if (empty($context)) {
238 $context = $PAGE->context;
241 // Change contextlevel to SYSTEM if viewing the site course
242 if ($context->contextlevel == CONTEXT_COURSE && $context->instanceid == SITEID) {
243 $context->contextlevel = CONTEXT_SYSTEM;
249 switch ($context->contextlevel) {
252 case CONTEXT_COURSECAT:
255 $filterparam = 'courseid';
256 $strlevel = get_string('course');
259 $filterparam = 'modid';
260 $strlevel = print_context_name($context);
263 $filterparam = 'userid';
264 $strlevel = get_string('user');
268 if (!empty($filterparam)) {
269 $viewblogentriesurl->param($filterparam, $context->instanceid);
272 return $viewblogentriesurl;
276 * This function checks that blogs are enabled, and that the user can see blogs at all
279 function blog_is_enabled_for_user() {
281 //return (!empty($CFG->bloglevel) && $CFG->bloglevel <= BLOG_GLOBAL_LEVEL && isloggedin() && !isguestuser());
282 return (!empty($CFG->bloglevel) && (isloggedin() || ($CFG->bloglevel == BLOG_GLOBAL_LEVEL)));
286 * This function gets all of the options available for the current user in respect
289 * It loads the following if applicable:
290 * - Module options {@see blog_get_options_for_module}
291 * - Course options {@see blog_get_options_for_course}
292 * - User specific options {@see blog_get_options_for_user}
293 * - General options (BLOG_LEVEL_GLOBAL)
295 * @param moodle_page $page The page to load for (normally $PAGE)
296 * @param stdClass $userid Load for a specific user
297 * @return array An array of options organised by type.
299 function blog_get_all_options(moodle_page $page, stdClass $userid = null) {
300 global $CFG, $DB, $USER;
304 // If blogs are enabled and the user is logged in and not a guest
305 if (blog_is_enabled_for_user()) {
306 // If the context is the user then assume we want to load for the users context
307 if (is_null($userid) && $page->context->contextlevel == CONTEXT_USER) {
308 $userid = $page->context->instanceid;
310 // Check the userid var
311 if (!is_null($userid) && $userid!==$USER->id) {
312 // Load the user from the userid... it MUST EXIST throw a wobbly if it doesn't!
313 $user = $DB->get_record('user', array('id'=>$userid), '*', MUST_EXIST);
318 if ($CFG->useblogassociations && $page->cm !== null) {
319 // Load for the module associated with the page
320 $options[CONTEXT_MODULE] = blog_get_options_for_module($page->cm, $user);
321 } else if ($CFG->useblogassociations && $page->course->id != SITEID) {
322 // Load the options for the course associated with the page
323 $options[CONTEXT_COURSE] = blog_get_options_for_course($page->course, $user);
326 // Get the options for the user
327 if ($user !== null) {
328 // Load for the requested user
329 $options[CONTEXT_USER+1] = blog_get_options_for_user($user);
331 // Load for the current user
332 $options[CONTEXT_USER] = blog_get_options_for_user();
335 // If blog level is global then display a link to view all site entries
336 if (!empty($CFG->bloglevel) && $CFG->bloglevel >= BLOG_GLOBAL_LEVEL && has_capability('moodle/blog:view', get_context_instance(CONTEXT_SYSTEM))) {
337 $options[CONTEXT_SYSTEM] = array('viewsite' => array(
338 'string' => get_string('viewsiteentries', 'blog'),
339 'link' => new moodle_url('/blog/index.php')
343 // Return the options
348 * Get all of the blog options that relate to the passed user.
350 * If no user is passed the current user is assumed.
352 * @staticvar array $useroptions Cache so we don't have to regenerate multiple times
353 * @param stdClass $user
354 * @return array The array of options for the requested user
356 function blog_get_options_for_user(stdClass $user=null) {
359 static $useroptions = array();
362 // Blogs must be enabled and the user must be logged in
363 if (!blog_is_enabled_for_user()) {
367 // Sort out the user var
368 if ($user === null || $user->id == $USER->id) {
370 $iscurrentuser = true;
372 $iscurrentuser = false;
375 // If we've already generated serve from the cache
376 if (array_key_exists($user->id, $useroptions)) {
377 return $useroptions[$user->id];
380 $sitecontext = get_context_instance(CONTEXT_SYSTEM);
381 $canview = has_capability('moodle/blog:view', $sitecontext);
383 if (!$iscurrentuser && $canview && ($CFG->bloglevel >= BLOG_SITE_LEVEL)) {
384 // Not the current user, but we can view and its blogs are enabled for SITE or GLOBAL
385 $options['userentries'] = array(
386 'string' => get_string('viewuserentries', 'blog', fullname($user)),
387 'link' => new moodle_url('/blog/index.php', array('userid'=>$user->id))
390 // It's the current user
392 // We can view our own blogs .... BIG surprise
393 $options['view'] = array(
394 'string' => get_string('viewallmyentries', 'blog'),
395 'link' => new moodle_url('/blog/index.php', array('userid'=>$USER->id))
398 if (has_capability('moodle/blog:create', $sitecontext)) {
399 // We can add to our own blog
400 $options['add'] = array(
401 'string' => get_string('addnewentry', 'blog'),
402 'link' => new moodle_url('/blog/edit.php', array('action'=>'add'))
407 $useroptions[$user->id] = $options;
408 // Return the options
413 * Get the blog options that relate to the given course for the given user.
415 * @staticvar array $courseoptions A cache so we can save regenerating multiple times
416 * @param stdClass $course The course to load options for
417 * @param stdClass $user The user to load options for null == current user
418 * @return array The array of options
420 function blog_get_options_for_course(stdClass $course, stdClass $user=null) {
423 static $courseoptions = array();
427 // User must be logged in and blogs must be enabled
428 if (!blog_is_enabled_for_user()) {
432 // Check that the user can associate with the course
433 $sitecontext = get_context_instance(CONTEXT_SYSTEM);
434 if (!has_capability('moodle/blog:associatecourse', $sitecontext)) {
437 // Generate the cache key
438 $key = $course->id.':';
444 // Serve from the cache if we've already generated for this course
445 if (array_key_exists($key, $courseoptions)) {
446 return $courseoptions[$key];
449 if (has_capability('moodle/blog:view', get_context_instance(CONTEXT_COURSE, $course->id))) {
451 if ($CFG->bloglevel >= BLOG_SITE_LEVEL) {
452 // View entries about this course
453 $options['courseview'] = array(
454 'string' => get_string('viewcourseblogs', 'blog'),
455 'link' => new moodle_url('/blog/index.php', array('courseid'=>$course->id))
458 // View MY entries about this course
459 $options['courseviewmine'] = array(
460 'string' => get_string('viewmyentriesaboutcourse', 'blog'),
461 'link' => new moodle_url('/blog/index.php', array('courseid'=>$course->id, 'userid'=>$USER->id))
463 if (!empty($user) && ($CFG->bloglevel >= BLOG_SITE_LEVEL)) {
464 // View the provided users entries about this course
465 $options['courseviewuser'] = array(
466 'string' => get_string('viewentriesbyuseraboutcourse', 'blog', fullname($user)),
467 'link' => new moodle_url('/blog/index.php', array('courseid'=>$course->id, 'userid'=>$user->id))
472 if (has_capability('moodle/blog:create', $sitecontext)) {
473 // We can blog about this course
474 $options['courseadd'] = array(
475 'string' => get_string('blogaboutthiscourse', 'blog', get_string('course')),
476 'link' => new moodle_url('/blog/edit.php', array('action'=>'add', 'courseid'=>$course->id))
481 // Cache the options for this course
482 $courseoptions[$key] = $options;
483 // Return the options
488 * Get the blog options relating to the given module for the given user
490 * @staticvar array $moduleoptions Cache
491 * @param stdClass $module The module to get options for
492 * @param stdClass $user The user to get options for null == currentuser
495 function blog_get_options_for_module(stdClass $module, stdClass $user=null) {
498 static $moduleoptions = array();
501 // User must be logged in, blogs must be enabled
502 if (!blog_is_enabled_for_user()) {
506 // Check the user can associate with the module
507 $sitecontext = get_context_instance(CONTEXT_SYSTEM);
508 if (!has_capability('moodle/blog:associatemodule', $sitecontext)) {
512 // Generate the cache key
513 $key = $module->id.':';
519 if (array_key_exists($key, $moduleoptions)) {
520 // Serve from the cache so we don't have to regenerate
521 return $moduleoptions[$module->id];
524 if (has_capability('moodle/blog:view', get_context_instance(CONTEXT_MODULE, $module->id))) {
526 if ($CFG->bloglevel >= BLOG_SITE_LEVEL) {
527 // View all entries about this module
529 $a->type = $module->modname;
530 $options['moduleview'] = array(
531 'string' => get_string('viewallmodentries', 'blog', $a),
532 'link' => new moodle_url('/blog/index.php', array('modid'=>$module->id))
535 // View MY entries about this module
536 $options['moduleviewmine'] = array(
537 'string' => get_string('viewmyentriesaboutmodule', 'blog', $module->modname),
538 'link' => new moodle_url('/blog/index.php', array('modid'=>$module->id, 'userid'=>$USER->id))
540 if (!empty($user) && ($CFG->bloglevel >= BLOG_SITE_LEVEL)) {
541 // View the given users entries about this module
543 $a->mod = $module->modname;
544 $a->user = fullname($user);
545 $options['moduleviewuser'] = array(
546 'string' => get_string('blogentriesbyuseraboutmodule', 'blog', $a),
547 'link' => new moodle_url('/blog/index.php', array('modid'=>$module->id, 'userid'=>$user->id))
552 if (has_capability('moodle/blog:create', $sitecontext)) {
553 // The user can blog about this module
554 $options['moduleadd'] = array(
555 'string' => get_string('blogaboutthismodule', 'blog', $module->modname),
556 'link' => new moodle_url('/blog/edit.php', array('action'=>'add', 'modid'=>$module->id))
560 $moduleoptions[$key] = $options;
561 // Return the options
566 * This function encapsulates all the logic behind the complex
567 * navigation, titles and headings of the blog listing page, depending
568 * on URL params. It looks at URL params and at the current context level.
569 * It builds and returns an array containing:
571 * 1. heading: The heading displayed above the blog entries
572 * 2. stradd: The text to be used as the "Add entry" link
573 * 3. strview: The text to be used as the "View entries" link
574 * 4. url: The moodle_url object used as the base for add and view links
575 * 5. filters: An array of parameters used to filter blog listings. Used by index.php and the Recent blogs block
577 * All other variables are set directly in $PAGE
579 * It uses the current URL to build these variables.
580 * A number of mutually exclusive use cases are used to structure this function.
584 function blog_get_headers($courseid=null, $groupid=null, $userid=null, $tagid=null) {
585 global $CFG, $PAGE, $DB, $USER;
587 $id = optional_param('id', null, PARAM_INT);
588 $tag = optional_param('tag', null, PARAM_NOTAGS);
589 $tagid = optional_param('tagid', $tagid, PARAM_INT);
590 $userid = optional_param('userid', $userid, PARAM_INT);
591 $modid = optional_param('modid', null, PARAM_INT);
592 $entryid = optional_param('entryid', null, PARAM_INT);
593 $groupid = optional_param('groupid', $groupid, PARAM_INT);
594 $courseid = optional_param('courseid', $courseid, PARAM_INT);
595 $search = optional_param('search', null, PARAM_RAW);
596 $action = optional_param('action', null, PARAM_ALPHA);
597 $confirm = optional_param('confirm', false, PARAM_BOOL);
599 // Ignore userid when action == add
600 if ($action == 'add' && $userid) {
602 $PAGE->url->remove_params(array('userid'));
603 } else if ($action == 'add' && $entryid) {
605 $PAGE->url->remove_params(array('entryid'));
608 $headers = array('title' => '', 'heading' => '', 'cm' => null, 'filters' => array());
610 $blogurl = new moodle_url('/blog/index.php');
612 // If the title is not yet set, it's likely that the context isn't set either, so skip this part
613 $pagetitle = $PAGE->title;
614 if (!empty($pagetitle)) {
615 $contexturl = blog_get_context_url();
617 // Look at the context URL, it may have additional params that are not in the current URL
618 if (!$blogurl->compare($contexturl)) {
619 $blogurl = $contexturl;
620 if (empty($courseid)) {
621 $courseid = $blogurl->param('courseid');
624 $modid = $blogurl->param('modid');
629 $headers['stradd'] = get_string('addnewentry', 'blog');
630 $headers['strview'] = null;
632 $site = $DB->get_record('course', array('id' => SITEID));
633 $sitecontext = get_context_instance(CONTEXT_SYSTEM);
634 // Common Lang strings
635 $strparticipants = get_string("participants");
636 $strblogentries = get_string("blogentries", 'blog');
638 // Prepare record objects as needed
639 if (!empty($courseid)) {
640 $headers['filters']['course'] = $courseid;
641 $course = $DB->get_record('course', array('id' => $courseid));
644 if (!empty($userid)) {
645 $headers['filters']['user'] = $userid;
646 $user = $DB->get_record('user', array('id' => $userid));
649 if (!empty($groupid)) { // groupid always overrides courseid
650 $headers['filters']['group'] = $groupid;
651 $group = $DB->get_record('groups', array('id' => $groupid));
652 $course = $DB->get_record('course', array('id' => $group->courseid));
655 $PAGE->set_pagelayout('standard');
657 if (!empty($modid) && $CFG->useblogassociations && has_capability('moodle/blog:associatemodule', $sitecontext)) { // modid always overrides courseid, so the $course object may be reset here
658 $headers['filters']['module'] = $modid;
659 // A groupid param may conflict with this coursemod's courseid. Ignore groupid in that case
660 $courseid = $DB->get_field('course_modules', 'course', array('id'=>$modid));
661 $course = $DB->get_record('course', array('id' => $courseid));
662 $cm = $DB->get_record('course_modules', array('id' => $modid));
663 $cm->modname = $DB->get_field('modules', 'name', array('id' => $cm->module));
664 $cm->name = $DB->get_field($cm->modname, 'name', array('id' => $cm->instance));
666 $a->type = get_string('modulename', $cm->modname);
667 $PAGE->set_cm($cm, $course);
668 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
669 $headers['strview'] = get_string('viewallmodentries', 'blog', $a);
672 // Case 1: No entry, mod, course or user params: all site entries to be shown (filtered by search and tag/tagid)
673 // Note: if action is set to 'add' or 'edit', we do this at the end
674 if (empty($entryid) && empty($modid) && empty($courseid) && empty($userid) && !in_array($action, array('edit', 'add'))) {
675 $PAGE->navbar->add($strblogentries, $blogurl);
676 $PAGE->set_title("$site->shortname: " . get_string('blog', 'blog'));
677 $PAGE->set_heading("$site->shortname: " . get_string('blog', 'blog'));
678 $headers['heading'] = get_string('siteblog', 'blog', $site->shortname);
679 // $headers['strview'] = get_string('viewsiteentries', 'blog');
682 // Case 2: only entryid is requested, ignore all other filters. courseid is used to give more contextual information
683 if (!empty($entryid)) {
684 $headers['filters']['entry'] = $entryid;
685 $sql = 'SELECT u.* FROM {user} u, {post} p WHERE p.id = ? AND p.userid = u.id';
686 $user = $DB->get_record_sql($sql, array($entryid));
687 $entry = $DB->get_record('post', array('id' => $entryid));
689 $blogurl->param('userid', $user->id);
691 if (!empty($course)) {
692 $mycourseid = $course->id;
693 $blogurl->param('courseid', $mycourseid);
695 $mycourseid = $site->id;
698 $PAGE->navbar->add($strblogentries, $blogurl);
700 $blogurl->remove_params('userid');
701 $PAGE->navbar->add($entry->subject, $blogurl);
703 $PAGE->set_title("$site->shortname: " . fullname($user) . ": $entry->subject");
704 $PAGE->set_heading("$site->shortname: " . fullname($user) . ": $entry->subject");
705 $headers['heading'] = get_string('blogentrybyuser', 'blog', fullname($user));
707 // We ignore tag and search params
708 if (empty($action) || !$CFG->useblogassociations) {
709 $headers['url'] = $blogurl;
714 // Case 3: A user's blog entries
715 if (!empty($userid) && empty($entryid) && ((empty($courseid) && empty($modid)) || !$CFG->useblogassociations)) {
716 $blogurl->param('userid', $userid);
717 $PAGE->set_title("$site->shortname: " . fullname($user) . ": " . get_string('blog', 'blog'));
718 $PAGE->set_heading("$site->shortname: " . fullname($user) . ": " . get_string('blog', 'blog'));
719 $headers['heading'] = get_string('userblog', 'blog', fullname($user));
720 $headers['strview'] = get_string('viewuserentries', 'blog', fullname($user));
724 // Case 4: No blog associations, no userid
725 if (!$CFG->useblogassociations && empty($userid) && !in_array($action, array('edit', 'add'))) {
726 $PAGE->set_title("$site->shortname: " . get_string('blog', 'blog'));
727 $PAGE->set_heading("$site->shortname: " . get_string('blog', 'blog'));
728 $headers['heading'] = get_string('siteblog', 'blog', $site->shortname);
731 // Case 5: Blog entries associated with an activity by a specific user (courseid ignored)
732 if (!empty($userid) && !empty($modid) && empty($entryid)) {
733 $blogurl->param('userid', $userid);
734 $blogurl->param('modid', $modid);
736 // Course module navigation is handled by build_navigation as the second param
737 $headers['cm'] = $cm;
738 $PAGE->navbar->add(fullname($user), "$CFG->wwwroot/user/view.php?id=$user->id");
739 $PAGE->navbar->add($strblogentries, $blogurl);
741 $PAGE->set_title("$site->shortname: $cm->name: " . fullname($user) . ': ' . get_string('blogentries', 'blog'));
742 $PAGE->set_heading("$site->shortname: $cm->name: " . fullname($user) . ': ' . get_string('blogentries', 'blog'));
745 $a->user = fullname($user);
747 $a->type = get_string('modulename', $cm->modname);
748 $headers['heading'] = get_string('blogentriesbyuseraboutmodule', 'blog', $a);
749 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
750 $headers['strview'] = get_string('viewallmodentries', 'blog', $a);
753 // Case 6: Blog entries associated with a course by a specific user
754 if (!empty($userid) && !empty($courseid) && empty($modid) && empty($entryid)) {
755 $blogurl->param('userid', $userid);
756 $blogurl->param('courseid', $courseid);
758 $PAGE->navbar->add($strblogentries, $blogurl);
760 $PAGE->set_title("$site->shortname: $course->shortname: " . fullname($user) . ': ' . get_string('blogentries', 'blog'));
761 $PAGE->set_heading("$site->shortname: $course->shortname: " . fullname($user) . ': ' . get_string('blogentries', 'blog'));
764 $a->user = fullname($user);
765 $a->course = $course->fullname;
766 $a->type = get_string('course');
767 $headers['heading'] = get_string('blogentriesbyuseraboutcourse', 'blog', $a);
768 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
769 $headers['strview'] = get_string('viewblogentries', 'blog', $a);
771 // Remove the userid from the URL to inform the blog_menu block correctly
772 $blogurl->remove_params(array('userid'));
775 // Case 7: Blog entries by members of a group, associated with that group's course
776 if (!empty($groupid) && empty($modid) && empty($entryid)) {
777 $blogurl->param('courseid', $course->id);
779 $PAGE->navbar->add($strblogentries, $blogurl);
780 $blogurl->remove_params(array('courseid'));
781 $blogurl->param('groupid', $groupid);
782 $PAGE->navbar->add($group->name, $blogurl);
784 $PAGE->set_title("$site->shortname: $course->shortname: " . get_string('blogentries', 'blog') . ": $group->name");
785 $PAGE->set_heading("$site->shortname: $course->shortname: " . get_string('blogentries', 'blog') . ": $group->name");
788 $a->group = $group->name;
789 $a->course = $course->fullname;
790 $a->type = get_string('course');
791 $headers['heading'] = get_string('blogentriesbygroupaboutcourse', 'blog', $a);
792 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
793 $headers['strview'] = get_string('viewblogentries', 'blog', $a);
796 // Case 8: Blog entries by members of a group, associated with an activity in that course
797 if (!empty($groupid) && !empty($modid) && empty($entryid)) {
798 $headers['cm'] = $cm;
799 $blogurl->param('modid', $modid);
800 $PAGE->navbar->add($strblogentries, $blogurl);
802 $blogurl->param('groupid', $groupid);
803 $PAGE->navbar->add($group->name, $blogurl);
805 $PAGE->set_title("$site->shortname: $course->shortname: $cm->name: " . get_string('blogentries', 'blog') . ": $group->name");
806 $PAGE->set_heading("$site->shortname: $course->shortname: $cm->name: " . get_string('blogentries', 'blog') . ": $group->name");
809 $a->group = $group->name;
811 $a->type = get_string('modulename', $cm->modname);
812 $headers['heading'] = get_string('blogentriesbygroupaboutmodule', 'blog', $a);
813 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
814 $headers['strview'] = get_string('viewallmodentries', 'blog', $a);
818 // Case 9: All blog entries associated with an activity
819 if (!empty($modid) && empty($userid) && empty($groupid) && empty($entryid)) {
820 $PAGE->set_cm($cm, $course);
821 $blogurl->param('modid', $modid);
822 $PAGE->navbar->add($strblogentries, $blogurl);
823 $PAGE->set_title("$site->shortname: $course->shortname: $cm->name: " . get_string('blogentries', 'blog'));
824 $PAGE->set_heading("$site->shortname: $course->shortname: $cm->name: " . get_string('blogentries', 'blog'));
825 $headers['heading'] = get_string('blogentriesabout', 'blog', $cm->name);
827 $a->type = get_string('modulename', $cm->modname);
828 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
829 $headers['strview'] = get_string('viewallmodentries', 'blog', $a);
832 // Case 10: All blog entries associated with a course
833 if (!empty($courseid) && empty($userid) && empty($groupid) && empty($modid) && empty($entryid)) {
834 $blogurl->param('courseid', $courseid);
835 $PAGE->navbar->add($strblogentries, $blogurl);
836 $PAGE->set_title("$site->shortname: $course->shortname: " . get_string('blogentries', 'blog'));
837 $PAGE->set_heading("$site->shortname: $course->shortname: " . get_string('blogentries', 'blog'));
839 $a->type = get_string('course');
840 $headers['heading'] = get_string('blogentriesabout', 'blog', $course->fullname);
841 $headers['stradd'] = get_string('blogaboutthis', 'blog', $a);
842 $headers['strview'] = get_string('viewblogentries', 'blog', $a);
843 $blogurl->remove_params(array('userid'));
846 if (!in_array($action, array('edit', 'add'))) {
848 if (!empty($tagid)) {
849 $headers['filters']['tag'] = $tagid;
850 $blogurl->param('tagid', $tagid);
851 $tagrec = $DB->get_record('tag', array('id'=>$tagid));
852 $PAGE->navbar->add($tagrec->name, $blogurl);
853 } elseif (!empty($tag)) {
854 $blogurl->param('tag', $tag);
855 $PAGE->navbar->add(get_string('tagparam', 'blog', $tag), $blogurl);
858 // Append Search info
859 if (!empty($search)) {
860 $headers['filters']['search'] = $search;
861 $blogurl->param('search', $search);
862 $PAGE->navbar->add(get_string('searchterm', 'blog', $search), $blogurl->out());
866 // Append edit mode info
867 if (!empty($action) && $action == 'add') {
869 } else if (!empty($action) && $action == 'edit') {
870 $PAGE->navbar->add(get_string('editentry', 'blog'));
873 if (empty($headers['url'])) {
874 $headers['url'] = $blogurl;
880 * Shortcut function for getting a count of blog entries associated with a course or a module
881 * @param int $courseid The ID of the course
882 * @param int $cmid The ID of the course_modules
883 * @return string The number of associated entries
885 function blog_get_associated_count($courseid, $cmid=null) {
887 $context = get_context_instance(CONTEXT_COURSE, $courseid);
889 $context = get_context_instance(CONTEXT_MODULE, $cmid);
891 return $DB->count_records('blog_association', array('contextid' => $context->id));