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locallib.php
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locallib.php
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<?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();
/**
* 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 {
// 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();
// Methods
/**
* Constructor. If given an id, will fetch the corresponding record from the DB.
*
* @param mixed $idorparams A blog entry id if INT, or data for a new entry if array
*/
public function __construct($id=null, $params=null, $form=null) {
global $DB, $PAGE;
if (!empty($id)) {
$object = $DB->get_record('post', array('id' => $id));
foreach ($object as $var => $val) {
$this->$var = $val;
}
} else if (!empty($params) && (is_array($params) || is_object($params))) {
foreach ($params as $var => $val) {
$this->$var = $val;
}
}
$this->form = $form;
}
/**
* Prints or returns the HTML for this blog entry.
*
* @param bool $return
* @return string
*/
public function print_html($return=false) {
global $USER, $CFG, $COURSE, $DB, $OUTPUT, $PAGE;
$user = $DB->get_record('user', array('id'=>$this->userid));
$cmttext = '';
if (!empty($CFG->usecomments) and $CFG->blogusecomments) {
require_once($CFG->dirroot . '/comment/lib.php');
// Comments
$cmt = new stdClass();
$cmt->context = get_context_instance(CONTEXT_USER, $user->id);
$cmt->courseid = $PAGE->course->id;
$cmt->area = 'format_blog';
$cmt->env = 'blog';
$cmt->itemid = $this->id;
$cmt->showcount = $CFG->blogshowcommentscount;
$comment = new comment($cmt);
$cmttext = $comment->output(true);
}
$this->summary = file_rewrite_pluginfile_urls($this->summary, 'pluginfile.php', SYSCONTEXTID, 'blog', 'post', $this->id);
$template['body'] = format_text($this->summary, $this->summaryformat).$cmttext;
$template['title'] = format_string($this->subject);
$template['userid'] = $user->id;
$template['author'] = fullname($user);
$template['created'] = userdate($this->created);
if ($this->created != $this->lastmodified) {
$template['lastmod'] = userdate($this->lastmodified);
}
$template['publishstate'] = $this->publishstate;
$stredit = get_string('edit');
$strdelete = get_string('delete');
// Check to see if the entry is unassociated with group/course level access
$unassociatedentry = false;
if (!empty($CFG->useblogassociations) && ($this->publishstate == 'group' || $this->publishstate == 'course')) {
if (!$DB->record_exists('blog_association', array('blogid' => $this->id))) {
$unassociatedentry = true;
}
}
// Start printing of the blog
$table = new html_table();
$table->cellspacing = 0;
$table->attributes['class'] = 'forumpost blog_entry blog'. ($unassociatedentry ? 'draft' : $template['publishstate']);
$table->attributes['id'] = 'b'.$this->id;
$table->width = '100%';
$picturecell = new html_table_cell();
$picturecell->attributes['class'] = 'picture left';
$picturecell->text = $OUTPUT->user_picture($user);
$table->head[] = $picturecell;
$topiccell = new html_table_cell();
$topiccell->attributes['class'] = 'topic starter';
$titlelink = html_writer::link(new moodle_url('/blog/index.php', array('entryid' => $this->id)), $template['title']);
$topiccell->text = $OUTPUT->container($titlelink, 'subject');
$topiccell->text .= $OUTPUT->container_start('author');
$fullname = fullname($user, has_capability('moodle/site:viewfullnames', get_context_instance(CONTEXT_COURSE, $PAGE->course->id)));
$by = new object();
$by->name = html_writer::link(new moodle_url('/user/view.php', array('id' => $user->id, 'course' => $PAGE->course->id)), $fullname);
$by->date = $template['created'];
$topiccell->text .= get_string('bynameondate', 'forum', $by);
$topiccell->text .= $OUTPUT->container_end();
if ($this->uniquehash && $this->content) {
if ($externalblog = $DB->get_record('blog_external', array('id' => $this->content))) {
$urlparts = parse_url($externalblog->url);
$topiccell->text .= $OUTPUT->container(get_string('retrievedfrom', 'blog').get_string('labelsep', 'langconfig').html_writer::link($urlparts['scheme'].'://'.$urlparts['host'], $externalblog->name), 'externalblog');
}
}
$topiccell->header = false;
$table->head[] = $topiccell;
// Actual content
$mainrow = new html_table_row();
$leftsidecell = new html_table_cell();
$leftsidecell->attributes['class'] = 'left side';
$mainrow->cells[] = $leftsidecell;
$contentcell = new html_table_cell();
$contentcell->attributes['class'] = 'content';
$attachedimages = $OUTPUT->container($this->print_attachments(), 'attachments');
// retrieve associations in case they're needed early
$blogassociations = $DB->get_records('blog_association', array('blogid' => $this->id));
// determine text for publish state
switch ($template['publishstate']) {
case 'draft':
$blogtype = get_string('publishtonoone', 'blog');
break;
case 'site':
$blogtype = get_string('publishtosite', 'blog');
break;
case 'public':
$blogtype = get_string('publishtoworld', 'blog');
break;
default:
$blogtype = '';
break;
}
$contentcell->text .= $OUTPUT->container($blogtype, 'audience');
$contentcell->text .= $template['body'];
$contentcell->text .= $attachedimages;
// Uniquehash is used as a link to an external blog
if (!empty($this->uniquehash)) {
$contentcell->text .= $OUTPUT->container_start('externalblog');
$contentcell->text .= html_writer::link($this->uniquehash, get_string('linktooriginalentry', 'blog'));
$contentcell->text .= $OUTPUT->container_end();
}
// Links to tags
$officialtags = tag_get_tags_csv('post', $this->id, TAG_RETURN_HTML, 'official');
$defaulttags = tag_get_tags_csv('post', $this->id, TAG_RETURN_HTML, 'default');
if (!empty($CFG->usetags) && ($officialtags || $defaulttags) ) {
$contentcell->text .= $OUTPUT->container_start('tags');
if ($officialtags) {
$contentcell->text .= get_string('tags', 'tag') .': '. $OUTPUT->container($officialtags, 'officialblogtags');
if ($defaulttags) {
$contentcell->text .= ', ';
}
}
$contentcell->text .= $defaulttags;
$contentcell->text .= $OUTPUT->container_end();
}
// Add associations
if (!empty($CFG->useblogassociations) && $blogassociations) {
$contentcell->text .= $OUTPUT->container_start('tags');
$assocstr = '';
$hascourseassocs = false;
$assoctype = '';
// First find and show the associated course
foreach ($blogassociations as $assocrec) {
$contextrec = $DB->get_record('context', array('id' => $assocrec->contextid));
if ($contextrec->contextlevel == CONTEXT_COURSE) {
$assocurl = new moodle_url('/course/view.php', array('id' => $contextrec->instanceid));
$text = $DB->get_field('course', 'shortname', array('id' => $contextrec->instanceid)); //TODO: performance!!!!
$assocstr .= $OUTPUT->action_icon($assocurl, new pix_icon('i/course', $text), null, array(), true);
$hascourseassocs = true;
$assoctype = get_string('course');
}
}
// Now show mod association
foreach ($blogassociations as $assocrec) {
$contextrec = $DB->get_record('context', array('id' => $assocrec->contextid));
if ($contextrec->contextlevel == CONTEXT_MODULE) {
if ($hascourseassocs) {
$assocstr .= ', ';
$hascourseassocs = false;
}
$modinfo = $DB->get_record('course_modules', array('id' => $contextrec->instanceid));
$modname = $DB->get_field('modules', 'name', array('id' => $modinfo->module));
$assocurl = new moodle_url('/mod/'.$modname.'/view.php', array('id' => $modinfo->id));
$text = $DB->get_field($modname, 'name', array('id' => $modinfo->instance)); //TODO: performance!!!!
$assocstr .= $OUTPUT->action_icon($assocurl, new pix_icon('icon', $text, $modname), null, array(), true);
$assocstr .= ', ';
$assoctype = get_string('modulename', $modname);
}
}
$assocstr = substr($assocstr, 0, -2);
$contentcell->text .= get_string('associated', 'blog', $assoctype) . ': '. $assocstr;
$contentcell->text .= $OUTPUT->container_end();
}
if ($unassociatedentry) {
$contentcell->text .= $OUTPUT->container(get_string('associationunviewable', 'blog'), 'noticebox');
}
/// Commands
$contentcell->text .= $OUTPUT->container_start('commands');
if (blog_user_can_edit_entry($this) && empty($this->uniquehash)) {
$contentcell->text .= html_writer::link(new moodle_url('/blog/edit.php', array('action' => 'edit', 'entryid' => $this->id)), $stredit) . ' | ';
$contentcell->text .= html_writer::link(new moodle_url('/blog/edit.php', array('action' => 'delete', 'entryid' => $this->id)), $strdelete) . ' | ';
}
$contentcell->text .= html_writer::link(new moodle_url('/blog/index.php', array('entryid' => $this->id)), get_string('permalink', 'blog'));
$contentcell->text .= $OUTPUT->container_end();
if (isset($template['lastmod']) ){
$contentcell->text .= '<div style="font-size: 55%;">';
$contentcell->text .= ' [ '.get_string('modified').': '.$template['lastmod'].' ]';
$contentcell->text .= '</div>';
}
$mainrow->cells[] = $contentcell;
$table->data = array($mainrow);
if ($return) {
return html_writer::table($table);
} else {
echo html_writer::table($table);
}
}
/**
* 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
* @param mform $form Used for attachments
* @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();
$this->created = time();
// Insert the new blog entry.
if ($this->id = $DB->insert_record('post', $this)) {
// Update tags.
$this->add_tags_info();
if (!empty($CFG->useblogassociations)) {
$this->add_associations();
add_to_log(SITEID, 'blog', 'add', 'index.php?userid='.$this->userid.'&entryid='.$this->id, $this->subject);
}
tag_set('post', $this->id, $this->tags);
}
}
/**
* Updates this entry in the database. Access control checks must be done by calling code.
*
* @param mform $form Used for attachments
* @return void
*/
public function edit($params=array(), $form=null, $summaryoptions=array(), $attachmentoptions=array()) {
global $CFG, $USER, $DB, $PAGE;
$sitecontext = get_context_instance(CONTEXT_SYSTEM);
$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);
tag_set('post', $entry->id, $entry->tags);
add_to_log(SITEID, 'blog', 'update', 'index.php?userid='.$USER->id.'&entryid='.$entry->id, $entry->subject);
}
/**
* Deletes this entry from the database. Access control checks must be done by calling code.
*
* @return void
*/
public function delete() {
global $DB, $USER;
$returnurl = '';
$this->delete_attachments();
$DB->delete_records('post', array('id' => $this->id));
tag_set('post', $this->id, array());
add_to_log(SITEID, 'blog', 'delete', 'index.php?userid='. $this->userid, 'deleted blog entry with entry id# '. $this->id);
}
/**
* function to add all context associations to an entry
* @param int entry - data object processed to include all 'entry' fields and extra data from the edit_form object
*/
public function add_associations($action='add') {
global $DB, $USER;
$this->remove_associations();
if (!empty($this->courseassoc)) {
$this->add_association($this->courseassoc, $action);
}
if (!empty($this->modassoc)) {
$this->add_association($this->modassoc, $action);
}
}
/**
* add a single association for a blog entry
* @param int contextid - id of context to associate with the blog entry
*/
public function add_association($contextid, $action='add') {
global $DB, $USER;
$assocobject = new StdClass;
$assocobject->contextid = $contextid;
$assocobject->blogid = $this->id;
$DB->insert_record('blog_association', $assocobject);
$context = get_context_instance_by_id($contextid);
$courseid = null;
if ($context->contextlevel == CONTEXT_COURSE) {
$courseid = $context->instanceid;
add_to_log($courseid, 'blog', $action, 'index.php?userid='.$this->userid.'&entryid='.$this->id, $this->subject);
} else if ($context->contextlevel == CONTEXT_MODULE) {
$cm = $DB->get_record('course_modules', array('id' => $context->instanceid));
$modulename = $DB->get_field('modules', 'name', array('id' => $cm->module));
add_to_log($cm->course, 'blog', $action, 'index.php?userid='.$this->userid.'&entryid='.$this->id, $this->subject, $cm->id, $this->userid);
}
}
/**
* remove all associations for a blog entry
* @return voic
*/
public function remove_associations() {
global $DB;
$DB->delete_records('blog_association', array('blogid' => $this->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);
}
/**
* if return=html, then return a html string.
* if return=text, then return a text-only string.
* otherwise, print HTML for non-images, and return image HTML
*
* @param bool $return Whether to return or print the generated code
* @return void
*/
public function print_attachments($return=false) {
global $CFG, $OUTPUT;
require_once($CFG->libdir.'/filelib.php');
$fs = get_file_storage();
$syscontext = get_context_instance(CONTEXT_SYSTEM);
$files = $fs->get_area_files($syscontext->id, 'blog', 'attachment', $this->id);
$imagereturn = "";
$output = "";
$strattachment = get_string("attachment", "forum");
foreach ($files as $file) {
if ($file->is_directory()) {
continue;
}
$filename = $file->get_filename();
$ffurl = file_encode_url($CFG->wwwroot.'/pluginfile.php', '/'.SYSCONTEXTID.'/blog/attachment/'.$this->id.'/'.$filename);
$mimetype = $file->get_mimetype();
$icon = substr(mimeinfo_from_type("icon", $mimetype), 0, -4);
$type = mimeinfo_from_type("type", $mimetype);
$image = $OUTPUT->pix_icon("/f/$icon", $filename, 'moodle', array('class'=>'icon'));
if ($return == "html") {
$output .= html_writer::link($ffurl, $image);
$output .= html_writer::link($ffurl, $filename);
} else if ($return == "text") {
$output .= "$strattachment $filename:\n$ffurl\n";
} else {
if (in_array($type, array('image/gif', 'image/jpeg', 'image/png'))) { // Image attachments don't get printed as links
$imagereturn .= "<br />" . $OUTPUT->pix_icon($ffurl, $filename);
} else {
$imagereturn .= html_writer::link($ffurl, $image);
$imagereturn .= format_text(html_writer::link($ffurl, $filename), FORMAT_HTML, array('context'=>$syscontext));
}
}
}
if ($return) {
return $output;
}
return $imagereturn;
}
/**
* function to attach tags into an entry
* @return void
*/
public function add_tags_info() {
$tags = array();
if ($otags = optional_param('otags', '', PARAM_INT)) {
foreach ($otags as $tagid) {
// TODO : make this use the tag name in the form
if ($tag = tag_get('id', $tagid)) {
$tags[] = $tag->name;
}
}
}
tag_set('post', $this->id, $tags);
}
/**
* 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 = get_context_instance(CONTEXT_SYSTEM);
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;
$sitecontext = get_context_instance(CONTEXT_SYSTEM);
if (empty($CFG->bloglevel) || !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 = get_context_instance(CONTEXT_USER, $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 = array();
/**
* 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 $DB;
if (empty($this->entries)) {
if ($sqlarray = $this->get_entry_fetch_sql()) {
$this->entries = $DB->get_records_sql($sqlarray['sql'], $sqlarray['params'], $start, $limit);
} else {
return false;
}
}
return $this->entries;
}
public function get_entry_fetch_sql($count=false, $sort='lastmodified DESC', $userid = false) {
global $DB, $USER, $CFG;
if(!$userid) {
$userid = $USER->id;
}
// The query used to locate blog entries is complicated. It will be built from the following components:
$requiredfields = "p.*, u.firstname, u.lastname, u.email"; // the SELECT clause
$tables = array('p' => 'post', 'u' => 'user'); // components of the FROM clause (table_id => table_name)
$conditions = array('u.deleted = 0', 'p.userid = u.id', '(p.module = \'blog\' OR p.module = \'blog_external\')'); // components of the WHERE clause (conjunction)
// build up a clause for permission constraints
$params = array();
// fix for MDL-9165, use with readuserblogs capability in a user context can read that user's private blogs
// admins can see all blogs regardless of publish states, as described on the help page
if (has_capability('moodle/user:readuserblogs', get_context_instance(CONTEXT_SYSTEM))) {
// don't add permission constraints
} else if(!empty($this->filters['user']) && has_capability('moodle/user:readuserblogs',
get_context_instance(CONTEXT_USER, (empty($this->filters['user']->id) ? 0 : $this->filters['user']->id)))) {
// don't add permission constraints
} else {
if (isloggedin() and !isguestuser()) {
$assocexists = $DB->record_exists('blog_association', array()); //dont check association records if there aren't any
//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;
$sitecontext = get_context_instance(CONTEXT_SYSTEM);
$page = optional_param('blogpage', 0, PARAM_INT);
$limit = optional_param('limit', get_user_preferences('blogpagesize', 10), PARAM_INT);
$start = $page * $limit;
$morelink = '<br /> ';
if ($sqlarray = $this->get_entry_fetch_sql(true)) {
$totalentries = $DB->count_records_sql($sqlarray['sql'], $sqlarray['params']);
} else {
$totalentries = 0;
}
$entries = $this->get_entries($start, $limit);
$pagingbar = new paging_bar($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)) {
$addurl = new moodle_url("$CFG->wwwroot/blog/edit.php");
$urlparams = array('action' => 'add',
'userid' => $userid,
'courseid' => optional_param('courseid', null, PARAM_INT),
'groupid' => optional_param('groupid', null, PARAM_INT),
'modid' => optional_param('modid', null, PARAM_INT),
'tagid' => optional_param('tagid', null, PARAM_INT),
'tag' => optional_param('tag', null, PARAM_INT),
'search' => optional_param('search', null, PARAM_INT));
foreach ($urlparams as $var => $val) {
if (empty($val)) {
unset($urlparams[$var]);
}
}
$addurl->params($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);
$blogentry->print_html();
$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 {
$querystring .= '&'.$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)) {