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See Release Notes

  • Bug fixes for general core bugs in 4.2.x will end 22 April 2024 (12 months).
  • Bug fixes for security issues in 4.2.x will end 7 October 2024 (18 months).
  • PHP version: minimum PHP 8.0.0 Note: minimum PHP version has increased since Moodle 4.1. PHP 8.1.x is supported too.
/blog/ -> locallib.php (source)
<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Classes for Blogs.
 *
 * @package    moodlecore
 * @subpackage blog
 * @copyright  2009 Nicolas Connault
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

require_once($CFG->libdir . '/filelib.php');

/**
 * Blog_entry class. Represents an entry in a user's blog. Contains all methods for managing this entry.
 * This class does not contain any HTML-generating code. See blog_listing sub-classes for such code.
 * This class follows the Object Relational Mapping technique, its member variables being mapped to
 * the fields of the post table.
 *
 * @package    moodlecore
 * @subpackage blog
 * @copyright  2009 Nicolas Connault
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class blog_entry implements renderable {
    // Public Database fields.
    public $id;
    public $userid;
    public $subject;
    public $summary;
    public $rating = 0;
    public $attachment;
    public $publishstate;

    // Locked Database fields (Don't touch these).
    public $courseid = 0;
    public $groupid = 0;
    public $module = 'blog';
    public $moduleid = 0;
    public $coursemoduleid = 0;
    public $content;
    public $format = 1;
    public $uniquehash = '';
    public $lastmodified;
    public $created;
    public $usermodified;

    // Other class variables.
    public $form;
    public $tags = array();

    /** @var StdClass Data needed to render the entry */
    public $renderable;

> /** @var string summary format. */ /** > public string $summaryformat; * Constructor. If given an id, will fetch the corresponding record from the DB. > * > /** @var array summary editor. */ * @param mixed $idorparams A blog entry id if INT, or data for a new entry if array > public array $summary_editor; */ > public function __construct($id=null, $params=null, $form=null) { > /** @var string */ global $DB, $PAGE, $CFG; > public $summarytrust; > if (!empty($id)) { > /** @var int course associated with the blog post. */ $object = $DB->get_record('post', array('id' => $id)); > public $courseassoc; foreach ($object as $var => $val) { > $this->$var = $val; > /** @var string module associated with the blog post. */ } > public $modassoc; } else if (!empty($params) && (is_array($params) || is_object($params))) { > foreach ($params as $var => $val) { > /** @var mixed attachment. */ $this->$var = $val; > public $attachment_filemanager; } > } > /** @var string blog post body. */ > public $body; if (!empty($CFG->useblogassociations)) { > $associations = $DB->get_records('blog_association', array('blogid' => $this->id)); > /** @var int attachment entry id. */ foreach ($associations as $association) { > public $entryid; $context = context::instance_by_id($association->contextid); > if ($context->contextlevel == CONTEXT_COURSE) { > /** @var string|null submit button. */ $this->courseassoc = $association->contextid; > public $submitbutton; } else if ($context->contextlevel == CONTEXT_MODULE) { > $this->modassoc = $association->contextid; > /** @var string|null user alias. */ } > public $useridalias; } > } > /** @var string|null user picture. */ > public $picture; $this->form = $form; > } > /** @var string|null user first name. */ > public $firstname; > /** > /** @var string|null user middle name. */ * Gets the required data to print the entry > public $middlename; */ > public function prepare_render() { > /** @var string|null user last name. */ > public $lastname; global $DB, $CFG, $PAGE; > > /** @var string|null user first name phonetic. */ $this->renderable = new StdClass(); > public $firstnamephonetic; > $this->renderable->user = $DB->get_record('user', array('id' => $this->userid)); > /** @var string|null user last name phonetic. */ > public $lastnamephonetic; // Entry comments. > if (!empty($CFG->usecomments) and $CFG->blogusecomments) { > /** @var string|null user alternate name. */ require_once($CFG->dirroot . '/comment/lib.php'); > public $alternatename; > $cmt = new stdClass(); > /** @var string|null user email address. */ $cmt->context = context_user::instance($this->userid); > public $email; $cmt->courseid = $PAGE->course->id; > $cmt->area = 'format_blog'; > /** @var string */ $cmt->itemid = $this->id; > public $action; $cmt->showcount = $CFG->blogshowcommentscount; > $cmt->component = 'blog'; > /** @var string|null user picture description. */ $this->renderable->comment = new comment($cmt); > public $imagealt; } > > /** @var int module instance id. */ $this->summary = file_rewrite_pluginfile_urls($this->summary, 'pluginfile.php', SYSCONTEXTID, 'blog', 'post', $this->id); > public $modid; >
// External blog link. if ($this->uniquehash && $this->content) { if ($externalblog = $DB->get_record('blog_external', array('id' => $this->content))) { $urlparts = parse_url($externalblog->url); $this->renderable->externalblogtext = get_string('retrievedfrom', 'blog') . get_string('labelsep', 'langconfig'); $this->renderable->externalblogtext .= html_writer::link($urlparts['scheme'] . '://' . $urlparts['host'], $externalblog->name); } } // Retrieve associations. $this->renderable->unassociatedentry = false; if (!empty($CFG->useblogassociations)) { // Adding the entry associations data. if ($associations = $associations = $DB->get_records('blog_association', array('blogid' => $this->id))) { // Check to see if the entry is unassociated with group/course level access. if ($this->publishstate == 'group' || $this->publishstate == 'course') { $this->renderable->unassociatedentry = true; } foreach ($associations as $key => $assocrec) { if (!$context = context::instance_by_id($assocrec->contextid, IGNORE_MISSING)) { unset($associations[$key]); continue; } // The renderer will need the contextlevel of the association. $associations[$key]->contextlevel = $context->contextlevel; // Course associations. if ($context->contextlevel == CONTEXT_COURSE) { // TODO: performance!!!! $instancename = $DB->get_field('course', 'shortname', array('id' => $context->instanceid)); $associations[$key]->url = $assocurl = new moodle_url('/course/view.php', array('id' => $context->instanceid)); $associations[$key]->text = $instancename; $associations[$key]->icon = new pix_icon('i/course', $associations[$key]->text); } // Mod associations. if ($context->contextlevel == CONTEXT_MODULE) { // Getting the activity type and the activity instance id. $sql = 'SELECT cm.instance, m.name FROM {course_modules} cm JOIN {modules} m ON m.id = cm.module WHERE cm.id = :cmid'; $modinfo = $DB->get_record_sql($sql, array('cmid' => $context->instanceid)); // TODO: performance!!!! $instancename = $DB->get_field($modinfo->name, 'name', array('id' => $modinfo->instance)); $associations[$key]->type = get_string('modulename', $modinfo->name); $associations[$key]->url = new moodle_url('/mod/' . $modinfo->name . '/view.php', array('id' => $context->instanceid)); $associations[$key]->text = $instancename; $associations[$key]->icon = new pix_icon('icon', $associations[$key]->text, $modinfo->name); } } } $this->renderable->blogassociations = $associations; } // Entry attachments. $this->renderable->attachments = $this->get_attachments(); $this->renderable->usercanedit = blog_user_can_edit_entry($this); } /** * Gets the entry attachments list * @return array List of blog_entry_attachment instances */ public function get_attachments() { global $CFG; require_once($CFG->libdir.'/filelib.php'); $syscontext = context_system::instance(); $fs = get_file_storage(); $files = $fs->get_area_files($syscontext->id, 'blog', 'attachment', $this->id); // Adding a blog_entry_attachment for each non-directory file. $attachments = array(); foreach ($files as $file) { if ($file->is_directory()) { continue; } $attachments[] = new blog_entry_attachment($file, $this->id); } return $attachments; } /** * Inserts this entry in the database. Access control checks must be done by calling code. * * @param mform $form Used for attachments * @return void */ public function process_attachment($form) { $this->form = $form; } /** * Inserts this entry in the database. Access control checks must be done by calling code. * TODO Set the publishstate correctly * @return void */ public function add() { global $CFG, $USER, $DB; unset($this->id); $this->module = 'blog'; $this->userid = (empty($this->userid)) ? $USER->id : $this->userid; $this->lastmodified = time(); $this->created = time(); // Insert the new blog entry. $this->id = $DB->insert_record('post', $this); if (!empty($CFG->useblogassociations)) { $this->add_associations(); } core_tag_tag::set_item_tags('core', 'post', $this->id, context_user::instance($this->userid), $this->tags); // Trigger an event for the new entry. $event = \core\event\blog_entry_created::create(array( 'objectid' => $this->id, 'relateduserid' => $this->userid )); $event->set_blog_entry($this); $event->trigger(); } /** * Updates this entry in the database. Access control checks must be done by calling code. * * @param array $params Entry parameters. * @param moodleform $form Used for attachments. * @param array $summaryoptions Summary options. * @param array $attachmentoptions Attachment options. * * @return void */ public function edit($params=array(), $form=null, $summaryoptions=array(), $attachmentoptions=array()) { global $CFG, $DB; $sitecontext = context_system::instance(); $entry = $this; $this->form = $form; foreach ($params as $var => $val) { $entry->$var = $val; } $entry = file_postupdate_standard_editor($entry, 'summary', $summaryoptions, $sitecontext, 'blog', 'post', $entry->id); $entry = file_postupdate_standard_filemanager($entry, 'attachment', $attachmentoptions, $sitecontext, 'blog', 'attachment', $entry->id); if (!empty($CFG->useblogassociations)) { $entry->add_associations(); } $entry->lastmodified = time(); // Update record. $DB->update_record('post', $entry); core_tag_tag::set_item_tags('core', 'post', $entry->id, context_user::instance($this->userid), $entry->tags); $event = \core\event\blog_entry_updated::create(array( 'objectid' => $entry->id, 'relateduserid' => $entry->userid )); $event->set_blog_entry($entry); $event->trigger(); } /** * Deletes this entry from the database. Access control checks must be done by calling code. * * @return void */ public function delete() { global $DB; $this->delete_attachments(); $this->remove_associations(); // Get record to pass onto the event. $record = $DB->get_record('post', array('id' => $this->id)); $DB->delete_records('post', array('id' => $this->id)); core_tag_tag::remove_all_item_tags('core', 'post', $this->id); $event = \core\event\blog_entry_deleted::create(array( 'objectid' => $this->id, 'relateduserid' => $this->userid )); $event->add_record_snapshot("post", $record); $event->set_blog_entry($this); $event->trigger(); } /** * Function to add all context associations to an entry. * * @param string $unused This does nothing, do not use it. */ public function add_associations($unused = null) { if ($unused !== null) { debugging('Illegal argument used in blog_entry->add_associations()', DEBUG_DEVELOPER); } $this->remove_associations(); if (!empty($this->courseassoc)) { $this->add_association($this->courseassoc); } if (!empty($this->modassoc)) { $this->add_association($this->modassoc); } } /** * Add a single association for a blog entry * * @param int $contextid - id of context to associate with the blog entry. * @param string $unused This does nothing, do not use it. */ public function add_association($contextid, $unused = null) { global $DB; if ($unused !== null) { debugging('Illegal argument used in blog_entry->add_association()', DEBUG_DEVELOPER); } $assocobject = new StdClass; $assocobject->contextid = $contextid; $assocobject->blogid = $this->id; $id = $DB->insert_record('blog_association', $assocobject); // Trigger an association created event. $context = context::instance_by_id($contextid); $eventparam = array( 'objectid' => $id, 'other' => array('associateid' => $context->instanceid, 'subject' => $this->subject, 'blogid' => $this->id), 'relateduserid' => $this->userid ); if ($context->contextlevel == CONTEXT_COURSE) { $eventparam['other']['associatetype'] = 'course'; } else if ($context->contextlevel == CONTEXT_MODULE) { $eventparam['other']['associatetype'] = 'coursemodule'; } $event = \core\event\blog_association_created::create($eventparam); $event->trigger(); } /** * remove all associations for a blog entry * * @return void */ public function remove_associations() { global $DB; $associations = $DB->get_records('blog_association', array('blogid' => $this->id)); foreach ($associations as $association) { // Trigger an association deleted event. $context = context::instance_by_id($association->contextid); $eventparam = array( 'objectid' => $this->id, 'other' => array('subject' => $this->subject, 'blogid' => $this->id), 'relateduserid' => $this->userid ); $event = \core\event\blog_association_deleted::create($eventparam); $event->add_record_snapshot('blog_association', $association); $event->trigger(); // Now remove the association. $DB->delete_records('blog_association', array('id' => $association->id)); } } /** * Deletes all the user files in the attachments area for an entry * * @return void */ public function delete_attachments() { $fs = get_file_storage(); $fs->delete_area_files(SYSCONTEXTID, 'blog', 'attachment', $this->id); $fs->delete_area_files(SYSCONTEXTID, 'blog', 'post', $this->id); } /** * User can edit a blog entry if this is their own blog entry and they have * the capability moodle/blog:create, or if they have the capability * moodle/blog:manageentries. * This also applies to deleting of entries. * * @param int $userid Optional. If not given, $USER is used * @return boolean */ public function can_user_edit($userid=null) { global $CFG, $USER; if (empty($userid)) { $userid = $USER->id; } $sitecontext = context_system::instance(); if (has_capability('moodle/blog:manageentries', $sitecontext)) { return true; // Can edit any blog entry. } if ($this->userid == $userid && has_capability('moodle/blog:create', $sitecontext)) { return true; // Can edit own when having blog:create capability. } return false; } /** * Checks to see if a user can view the blogs of another user. * Only blog level is checked here, the capabilities are enforced * in blog/index.php * * @param int $targetuserid ID of the user we are checking * * @return bool */ public function can_user_view($targetuserid) { global $CFG, $USER, $DB; $sitecontext = context_system::instance(); if (empty($CFG->enableblogs) || !has_capability('moodle/blog:view', $sitecontext)) { return false; // Blog system disabled or user has no blog view capability. } if (isloggedin() && $USER->id == $targetuserid) { return true; // Can view own entries in any case. } if (has_capability('moodle/blog:manageentries', $sitecontext)) { return true; // Can manage all entries. } // Coming for 1 entry, make sure it's not a draft. if ($this->publishstate == 'draft' && !has_capability('moodle/blog:viewdrafts', $sitecontext)) { return false; // Can not view draft of others. } // Coming for 1 entry, make sure user is logged in, if not a public blog. if ($this->publishstate != 'public' && !isloggedin()) { return false; } switch ($CFG->bloglevel) { case BLOG_GLOBAL_LEVEL: return true; break; case BLOG_SITE_LEVEL: if (isloggedin()) { // Not logged in viewers forbidden. return true; } return false; break; case BLOG_USER_LEVEL: default: $personalcontext = context_user::instance($targetuserid); return has_capability('moodle/user:readuserblogs', $personalcontext); break; } } /** * Use this function to retrieve a list of publish states available for * the currently logged in user. * * @return array This function returns an array ideal for sending to moodles' * choose_from_menu function. */ public static function get_applicable_publish_states() { global $CFG; $options = array(); // Everyone gets draft access. if ($CFG->bloglevel >= BLOG_USER_LEVEL) { $options['draft'] = get_string('publishtonoone', 'blog'); } if ($CFG->bloglevel > BLOG_USER_LEVEL) { $options['site'] = get_string('publishtosite', 'blog'); } if ($CFG->bloglevel >= BLOG_GLOBAL_LEVEL) { $options['public'] = get_string('publishtoworld', 'blog'); } return $options; } } /** * Abstract Blog_Listing class: used to gather blog entries and output them as listings. One of the subclasses must be used. * * @package moodlecore * @subpackage blog * @copyright 2009 Nicolas Connault * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ class blog_listing { /** * Array of blog_entry objects. * @var array $entries */ public $entries = null; /** * Caches the total number of the entries. * @var int */ public $totalentries = null; /** * An array of blog_filter_* objects * @var array $filters */ public $filters = array(); /** * Constructor * * @param array $filters An associative array of filtername => filterid */ public function __construct($filters=array()) { // Unset filters overridden by more specific filters. foreach ($filters as $type => $id) { if (!empty($type) && !empty($id)) { $this->filters[$type] = blog_filter::get_instance($id, $type); } } foreach ($this->filters as $type => $filter) { foreach ($filter->overrides as $override) { if (array_key_exists($override, $this->filters)) { unset($this->filters[$override]); } } } } /** * Fetches the array of blog entries. * * @return array */ public function get_entries($start=0, $limit=10) { global $DB; if ($this->entries === null) { if ($sqlarray = $this->get_entry_fetch_sql(false, 'created DESC')) { $this->entries = $DB->get_records_sql($sqlarray['sql'], $sqlarray['params'], $start, $limit); if (!$start && count($this->entries) < $limit) { $this->totalentries = count($this->entries); } } else { return false; } } return $this->entries; } /** * Finds total number of blog entries * * @return int */ public function count_entries() { global $DB; if ($this->totalentries === null) { if ($sqlarray = $this->get_entry_fetch_sql(true)) { $this->totalentries = $DB->count_records_sql($sqlarray['sql'], $sqlarray['params']); } else { $this->totalentries = 0; } } return $this->totalentries; } public function get_entry_fetch_sql($count=false, $sort='lastmodified DESC', $userid = false) { global $DB, $USER, $CFG; if (!$userid) { $userid = $USER->id; } $userfieldsapi = \core_user\fields::for_userpic(); $allnamefields = $userfieldsapi->get_sql('u', false, '', 'useridalias', false)->selects; // The query used to locate blog entries is complicated. It will be built from the following components: $requiredfields = "p.*, $allnamefields"; // The SELECT clause. $tables = array('p' => 'post', 'u' => 'user'); // Components of the FROM clause (table_id => table_name). // Components of the WHERE clause (conjunction). $conditions = array('u.deleted = 0', 'p.userid = u.id', '(p.module = \'blog\' OR p.module = \'blog_external\')'); // Build up a clause for permission constraints. $params = array(); // Fix for MDL-9165, use with readuserblogs capability in a user context can read that user's private blogs. // Admins can see all blogs regardless of publish states, as described on the help page. if (has_capability('moodle/user:readuserblogs', context_system::instance())) { // Don't add permission constraints. } else if (!empty($this->filters['user']) && has_capability('moodle/user:readuserblogs', context_user::instance((empty($this->filters['user']->id) ? 0 : $this->filters['user']->id)))) { // Don't add permission constraints. } else { if (isloggedin() and !isguestuser()) { // Dont check association records if there aren't any. $assocexists = $DB->record_exists('blog_association', array()); // Begin permission sql clause. $permissionsql = '(p.userid = ? '; $params[] = $userid; if ($CFG->bloglevel >= BLOG_SITE_LEVEL) { // Add permission to view site-level entries. $permissionsql .= " OR p.publishstate = 'site' "; } if ($CFG->bloglevel >= BLOG_GLOBAL_LEVEL) { // Add permission to view global entries. $permissionsql .= " OR p.publishstate = 'public' "; } $permissionsql .= ') '; // Close permissions sql clause. } else { // Default is access to public entries. $permissionsql = "p.publishstate = 'public'"; } $conditions[] = $permissionsql; // Add permission constraints. } foreach ($this->filters as $type => $blogfilter) { $conditions = array_merge($conditions, $blogfilter->conditions); $params = array_merge($params, $blogfilter->params); $tables = array_merge($tables, $blogfilter->tables); } $tablessql = ''; // Build up the FROM clause. foreach ($tables as $tablename => $table) { $tablessql .= ($tablessql ? ', ' : '').'{'.$table.'} '.$tablename; } $sql = ($count) ? 'SELECT COUNT(*)' : 'SELECT ' . $requiredfields; $sql .= " FROM $tablessql WHERE " . implode(' AND ', $conditions); $sql .= ($count) ? '' : " ORDER BY $sort"; return array('sql' => $sql, 'params' => $params); } /** * Outputs all the blog entries aggregated by this blog listing. * * @return void */ public function print_entries() { global $CFG, $USER, $DB, $OUTPUT, $PAGE; $sitecontext = context_system::instance(); // Blog renderer. $output = $PAGE->get_renderer('blog'); $page = optional_param('blogpage', 0, PARAM_INT); $limit = optional_param('limit', get_user_preferences('blogpagesize', 10), PARAM_INT); $start = $page * $limit; $morelink = '<br />&nbsp;&nbsp;'; $entries = $this->get_entries($start, $limit); $totalentries = $this->count_entries(); $pagingbar = new paging_bar($totalentries, $page, $limit, $this->get_baseurl()); $pagingbar->pagevar = 'blogpage'; $blogheaders = blog_get_headers(); echo $OUTPUT->render($pagingbar); if (has_capability('moodle/blog:create', $sitecontext)) { // The user's blog is enabled and they are viewing their own blog. $userid = optional_param('userid', null, PARAM_INT); if (empty($userid) || (!empty($userid) && $userid == $USER->id)) { $courseid = optional_param('courseid', null, PARAM_INT); $modid = optional_param('modid', null, PARAM_INT); $addurl = new moodle_url("$CFG->wwwroot/blog/edit.php"); $urlparams = array('action' => 'add', 'userid' => $userid, 'courseid' => $courseid, 'groupid' => optional_param('groupid', null, PARAM_INT), 'modid' => $modid, 'tagid' => optional_param('tagid', null, PARAM_INT), 'tag' => optional_param('tag', null, PARAM_INT), 'search' => optional_param('search', null, PARAM_INT)); $urlparams = array_filter($urlparams); $addurl->params($urlparams); $addlink = '<div class="addbloglink">'; $addlink .= '<a href="'.$addurl->out().'">'. $blogheaders['stradd'].'</a>'; $addlink .= '</div>'; echo $addlink; } } if ($entries) { $count = 0; foreach ($entries as $entry) { $blogentry = new blog_entry(null, $entry); // Get the required blog entry data to render it. $blogentry->prepare_render(); echo $output->render($blogentry); $count++; } echo $OUTPUT->render($pagingbar); if (!$count) { print '<br /><div style="text-align:center">'. get_string('noentriesyet', 'blog') .'</div><br />'; } print $morelink.'<br />'."\n"; return; } } // Find the base url from $_GET variables, for print_paging_bar. public function get_baseurl() { $getcopy = $_GET; unset($getcopy['blogpage']); if (!empty($getcopy)) { $first = false; $querystring = ''; foreach ($getcopy as $var => $val) { if (!$first) { $first = true; $querystring .= "?$var=$val"; } else { $querystring .= '&amp;'.$var.'='.$val; $hasparam = true; } } } else { $querystring = '?'; } return strip_querystring(qualified_me()) . $querystring; } } /** * Abstract class for blog_filter objects. * A set of core filters are implemented here. To write new filters, you need to subclass * blog_filter and give it the name of the type you want (for example, blog_filter_entry). * The blog_filter abstract class will automatically use it when the filter is added to the * URL. The first parameter of the constructor is the ID of your filter, but it can be a string * or have any other meaning you wish it to have. The second parameter is called $type and is * used as a sub-type for filters that have a very similar implementation (see blog_filter_context for an example) */ abstract class blog_filter { /** * An array of strings representing the available filter types for each blog_filter. * @var array $availabletypes */ public $availabletypes = array(); /** * The type of filter (for example, types of blog_filter_context are site, course and module) * @var string $type */ public $type; /** * The unique ID for a filter's associated record * @var int $id */ public $id; /** * An array of table aliases that are used in the WHERE conditions * @var array $tables */ public $tables = array(); /** * An array of WHERE conditions * @var array $conditions */ public $conditions = array(); /** * An array of SQL params * @var array $params */ public $params = array(); /** * An array of filter types which this particular filter type overrides: their conditions will not be evaluated */ public $overrides = array(); public function __construct($id, $type=null) { $this->id = $id; $this->type = $type; } /** * TODO This is poor design. A parent class should not know anything about its children. * The default case helps to resolve this design issue */ public static function get_instance($id, $type) { switch ($type) { case 'site': case 'course': case 'module': return new blog_filter_context($id, $type); break; case 'group': case 'user': return new blog_filter_user($id, $type); break; case 'tag': return new blog_filter_tag($id); break; default: $classname = "blog_filter_$type"; if (class_exists($classname)) { return new $classname($id, $type); } } } } /** * This filter defines the context level of the blog entries being searched: site, course, module */ class blog_filter_context extends blog_filter { /** * Constructor * * @param string $type * @param int $id */ public function __construct($id=null, $type='site') { global $SITE, $CFG, $DB; if (empty($id)) { $this->type = 'site'; } else { $this->id = $id; $this->type = $type; } $this->availabletypes = array('site' => get_string('site'), 'course' => get_string('course'), 'module' => get_string('activity'), 'context' => get_string('coresystem')); switch ($this->type) { case 'course': // Careful of site course! // Ignore course filter if blog associations are not enabled. if ($this->id != $SITE->id && !empty($CFG->useblogassociations)) { $this->overrides = array('site', 'context'); $context = context_course::instance($this->id); $this->tables['ba'] = 'blog_association'; $this->conditions[] = 'p.id = ba.blogid'; $this->conditions[] = 'ba.contextid = '.$context->id; break; } else { // We are dealing with the site course, do not break from the current case. } case 'site': // No special constraints. break; case 'module': if (!empty($CFG->useblogassociations)) { $this->overrides = array('course', 'site', 'context'); $context = context_module::instance($this->id); $this->tables['ba'] = 'blog_association'; $this->tables['p'] = 'post'; $this->conditions = array('p.id = ba.blogid', 'ba.contextid = ?'); $this->params = array($context->id); } break; case 'context': if ($id != context_system::instance()->id && !empty($CFG->useblogassociations)) { $this->overrides = array('site'); $context = context::instance_by_id($this->id); $this->tables['ba'] = 'blog_association'; $this->tables['ctx'] = 'context'; $this->conditions[] = 'p.id = ba.blogid'; $this->conditions[] = 'ctx.id = ba.contextid'; $this->conditions[] = 'ctx.path LIKE ?'; $this->params = array($context->path . '%'); } break; } } } /** * This filter defines the user level of the blog entries being searched: a userid or a groupid. * It can be combined with a context filter in order to refine the search. */ class blog_filter_user extends blog_filter { public $tables = array('u' => 'user'); /** * Constructor * * @param string $type * @param int $id */ public function __construct($id=null, $type='user') { global $CFG, $DB, $USER; $this->availabletypes = array('user' => get_string('user'), 'group' => get_string('group')); if (empty($id)) { $this->id = $USER->id; $this->type = 'user'; } else { $this->id = $id; $this->type = $type; } if ($this->type == 'user') { $this->conditions = array('u.id = ?'); $this->params = array($this->id); $this->overrides = array('group'); } else if ($this->type == 'group') { $this->overrides = array('course', 'site'); $this->tables['gm'] = 'groups_members'; $this->conditions[] = 'p.userid = gm.userid'; $this->conditions[] = 'gm.groupid = ?'; $this->params[] = $this->id; if (!empty($CFG->useblogassociations)) { // Only show blog entries associated with this course. $coursecontext = context_course::instance($DB->get_field('groups', 'courseid', array('id' => $this->id))); $this->tables['ba'] = 'blog_association'; $this->conditions[] = 'gm.groupid = ?'; $this->conditions[] = 'ba.contextid = ?'; $this->conditions[] = 'ba.blogid = p.id'; $this->params[] = $this->id; $this->params[] = $coursecontext->id; } } } } /** * This filter defines a tag by which blog entries should be searched. */ class blog_filter_tag extends blog_filter { public $tables = array('t' => 'tag', 'ti' => 'tag_instance', 'p' => 'post'); /** * Constructor * * @return void */ public function __construct($id) { global $DB; $this->id = $id; $this->conditions = array('ti.tagid = t.id', "ti.itemtype = 'post'", "ti.component = 'core'", 'ti.itemid = p.id', 't.id = ?'); $this->params = array($this->id); } } /** * This filter defines a specific blog entry id. */ class blog_filter_entry extends blog_filter { public $conditions = array('p.id = ?'); public $overrides = array('site', 'course', 'module', 'group', 'user', 'tag'); public function __construct($id) { $this->id = $id; $this->params[] = $this->id; } } /** * This filter restricts the results to a time interval in seconds up to time() */ class blog_filter_since extends blog_filter { public function __construct($interval) { $this->conditions[] = 'p.lastmodified >= ? AND p.lastmodified <= ?'; $this->params[] = time() - $interval; $this->params[] = time(); } } /** * Filter used to perform full-text search on an entry's subject, summary and content */ class blog_filter_search extends blog_filter { public function __construct($searchterm) { global $DB; $this->conditions = array("(".$DB->sql_like('p.summary', '?', false)." OR ".$DB->sql_like('p.content', '?', false)." OR ".$DB->sql_like('p.subject', '?', false).")"); $this->params[] = "%$searchterm%"; $this->params[] = "%$searchterm%"; $this->params[] = "%$searchterm%"; } } /** * Renderable class to represent an entry attachment */ class blog_entry_attachment implements renderable { public $filename; public $url; public $file; /** * Gets the file data * * @param stored_file $file * @param int $entryid Attachment entry id */ public function __construct($file, $entryid) { global $CFG; $this->file = $file; $this->filename = $file->get_filename(); $this->url = file_encode_url($CFG->wwwroot . '/pluginfile.php', '/' . SYSCONTEXTID . '/blog/attachment/' . $entryid . '/' . $this->filename); } }