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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/>.
/**
* Library of functions for forum outside of the core api
*
* @package mod_forum
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// Event types.
define('FORUM_EVENT_TYPE_DUE', 'due');
require_once($CFG->dirroot . '/mod/forum/lib.php');
require_once($CFG->libdir . '/portfolio/caller.php');
/**
* @package mod_forum
* @copyright 1999 onwards Martin Dougiamas {@link http://moodle.com}
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class forum_portfolio_caller extends portfolio_module_caller_base {
protected $postid;
protected $discussionid;
protected $attachment;
private $post;
private $forum;
private $discussion;
private $posts;
private $keyedfiles; // just using multifiles isn't enough if we're exporting a full thread
/**
* @return array
*/
public static function expected_callbackargs() {
return array(
'postid' => false,
'discussionid' => false,
'attachment' => false,
);
}
/**
* @param array $callbackargs
*/
function __construct($callbackargs) {
parent::__construct($callbackargs);
if (!$this->postid && !$this->discussionid) {
throw new portfolio_caller_exception('mustprovidediscussionorpost', 'forum');
}
}
/**
* @global object
*/
public function load_data() {
global $DB;
if ($this->postid) {
if (!$this->post = $DB->get_record('forum_posts', array('id' => $this->postid))) {
throw new portfolio_caller_exception('invalidpostid', 'forum');
}
}
$dparams = array();
if ($this->discussionid) {
$dbparams = array('id' => $this->discussionid);
} else if ($this->post) {
$dbparams = array('id' => $this->post->discussion);
} else {
throw new portfolio_caller_exception('mustprovidediscussionorpost', 'forum');
}
if (!$this->discussion = $DB->get_record('forum_discussions', $dbparams)) {
throw new portfolio_caller_exception('invaliddiscussionid', 'forum');
}
if (!$this->forum = $DB->get_record('forum', array('id' => $this->discussion->forum))) {
throw new portfolio_caller_exception('invalidforumid', 'forum');
}
if (!$this->cm = get_coursemodule_from_instance('forum', $this->forum->id)) {
throw new portfolio_caller_exception('invalidcoursemodule');
}
$this->modcontext = context_module::instance($this->cm->id);
$fs = get_file_storage();
if ($this->post) {
if ($this->attachment) {
// Make sure the requested file belongs to this post.
$file = $fs->get_file_by_id($this->attachment);
if ($file->get_contextid() != $this->modcontext->id
|| $file->get_itemid() != $this->post->id) {
throw new portfolio_caller_exception('filenotfound');
}
$this->set_file_and_format_data($this->attachment);
} else {
$attach = $fs->get_area_files($this->modcontext->id, 'mod_forum', 'attachment', $this->post->id, 'timemodified', false);
$embed = $fs->get_area_files($this->modcontext->id, 'mod_forum', 'post', $this->post->id, 'timemodified', false);
$files = array_merge($attach, $embed);
$this->set_file_and_format_data($files);
}
if (!empty($this->multifiles)) {
$this->keyedfiles[$this->post->id] = $this->multifiles;
} else if (!empty($this->singlefile)) {
$this->keyedfiles[$this->post->id] = array($this->singlefile);
}
} else { // whole thread
$fs = get_file_storage();
$this->posts = forum_get_all_discussion_posts($this->discussion->id, 'p.created ASC');
$this->multifiles = array();
foreach ($this->posts as $post) {
$attach = $fs->get_area_files($this->modcontext->id, 'mod_forum', 'attachment', $post->id, 'timemodified', false);
$embed = $fs->get_area_files($this->modcontext->id, 'mod_forum', 'post', $post->id, 'timemodified', false);
$files = array_merge($attach, $embed);
if ($files) {
$this->keyedfiles[$post->id] = $files;
} else {
continue;
}
$this->multifiles = array_merge($this->multifiles, array_values($this->keyedfiles[$post->id]));
}
}
if (empty($this->multifiles) && !empty($this->singlefile)) {
$this->multifiles = array($this->singlefile); // copy_files workaround
}
// depending on whether there are files or not, we might have to change richhtml/plainhtml
if (empty($this->attachment)) {
if (!empty($this->multifiles)) {
$this->add_format(PORTFOLIO_FORMAT_RICHHTML);
} else {
$this->add_format(PORTFOLIO_FORMAT_PLAINHTML);
}
}
}
/**
* @global object
* @return string
*/
function get_return_url() {
global $CFG;
return $CFG->wwwroot . '/mod/forum/discuss.php?d=' . $this->discussion->id;
}
/**
* @global object
* @return array
*/
function get_navigation() {
global $CFG;
$navlinks = array();
$navlinks[] = array(
'name' => format_string($this->discussion->name),
'link' => $CFG->wwwroot . '/mod/forum/discuss.php?d=' . $this->discussion->id,
'type' => 'title'
);
return array($navlinks, $this->cm);
}
/**
* either a whole discussion
* a single post, with or without attachment
* or just an attachment with no post
*
* @global object
* @global object
* @uses PORTFOLIO_FORMAT_RICH
* @return mixed
*/
function prepare_package() {
global $CFG;
// set up the leap2a writer if we need it
$writingleap = false;
if ($this->exporter->get('formatclass') == PORTFOLIO_FORMAT_LEAP2A) {
$leapwriter = $this->exporter->get('format')->leap2a_writer();
$writingleap = true;
}
if ($this->attachment) { // simplest case first - single file attachment
$this->copy_files(array($this->singlefile), $this->attachment);
if ($writingleap) { // if we're writing leap, make the manifest to go along with the file
$entry = new portfolio_format_leap2a_file($this->singlefile->get_filename(), $this->singlefile);
$leapwriter->add_entry($entry);
return $this->exporter->write_new_file($leapwriter->to_xml(), $this->exporter->get('format')->manifest_name(), true);
}
} else if (empty($this->post)) { // exporting whole discussion
$content = ''; // if we're just writing HTML, start a string to add each post to
$ids = array(); // if we're writing leap2a, keep track of all entryids so we can add a selection element
foreach ($this->posts as $post) {
$posthtml = $this->prepare_post($post);
if ($writingleap) {
$ids[] = $this->prepare_post_leap2a($leapwriter, $post, $posthtml);
} else {
$content .= $posthtml . '<br /><br />';
}
}
$this->copy_files($this->multifiles);
$name = 'discussion.html';
$manifest = ($this->exporter->get('format') instanceof PORTFOLIO_FORMAT_RICH);
if ($writingleap) {
// add on an extra 'selection' entry
$selection = new portfolio_format_leap2a_entry('forumdiscussion' . $this->discussionid,
get_string('discussion', 'forum') . ': ' . $this->discussion->name, 'selection');
$leapwriter->add_entry($selection);
$leapwriter->make_selection($selection, $ids, 'Grouping');
$content = $leapwriter->to_xml();
$name = $this->get('exporter')->get('format')->manifest_name();
}
$this->get('exporter')->write_new_file($content, $name, $manifest);
} else { // exporting a single post
$posthtml = $this->prepare_post($this->post);
$content = $posthtml;
$name = 'post.html';
$manifest = ($this->exporter->get('format') instanceof PORTFOLIO_FORMAT_RICH);
if ($writingleap) {
$this->prepare_post_leap2a($leapwriter, $this->post, $posthtml);
$content = $leapwriter->to_xml();
$name = $this->exporter->get('format')->manifest_name();
}
$this->copy_files($this->multifiles);
$this->get('exporter')->write_new_file($content, $name, $manifest);
}
}
/**
* helper function to add a leap2a entry element
* that corresponds to a single forum post,
* including any attachments
*
* the entry/ies are added directly to the leapwriter, which is passed by ref
*
* @param portfolio_format_leap2a_writer $leapwriter writer object to add entries to
* @param object $post the stdclass object representing the database record
* @param string $posthtml the content of the post (prepared by {@link prepare_post}
*
* @return int id of new entry
*/
private function prepare_post_leap2a(portfolio_format_leap2a_writer $leapwriter, $post, $posthtml) {
$entry = new portfolio_format_leap2a_entry('forumpost' . $post->id, $post->subject, 'resource', $posthtml);
$entry->published = $post->created;
$entry->updated = $post->modified;
$entry->author = $post->author;
if (is_array($this->keyedfiles) && array_key_exists($post->id, $this->keyedfiles) && is_array($this->keyedfiles[$post->id])) {
$leapwriter->link_files($entry, $this->keyedfiles[$post->id], 'forumpost' . $post->id . 'attachment');
}
$entry->add_category('web', 'resource_type');
$leapwriter->add_entry($entry);
return $entry->id;
}
/**
* @param array $files
* @param mixed $justone false of id of single file to copy
* @return bool|void
*/
private function copy_files($files, $justone=false) {
if (empty($files)) {
return;
}
foreach ($files as $f) {
if ($justone && $f->get_id() != $justone) {
continue;
}
$this->get('exporter')->copy_existing_file($f);
if ($justone && $f->get_id() == $justone) {
return true; // all we need to do
}
}
}
/**
* this is a very cut down version of what is in forum_make_mail_post
*
* @global object
* @param int $post
* @return string
*/
private function prepare_post($post, $fileoutputextras=null) {
global $DB;
static $users;
if (empty($users)) {
$users = array($this->user->id => $this->user);
}
if (!array_key_exists($post->userid, $users)) {
$users[$post->userid] = $DB->get_record('user', array('id' => $post->userid));
}
// add the user object on to the post so we can pass it to the leap writer if necessary
$post->author = $users[$post->userid];
$viewfullnames = true;
// format the post body
$options = portfolio_format_text_options();
$format = $this->get('exporter')->get('format');
$formattedtext = format_text($post->message, $post->messageformat, $options, $this->get('course')->id);
$formattedtext = portfolio_rewrite_pluginfile_urls($formattedtext, $this->modcontext->id, 'mod_forum', 'post', $post->id, $format);
$output = '<table border="0" cellpadding="3" cellspacing="0" class="forumpost">';
$output .= '<tr class="header"><td>';// can't print picture.
$output .= '</td>';
if ($post->parent) {
$output .= '<td class="topic">';
} else {
$output .= '<td class="topic starter">';
}
$output .= '<div class="subject">'.format_string($post->subject).'</div>';
$fullname = fullname($users[$post->userid], $viewfullnames);
$by = new stdClass();
$by->name = $fullname;
$by->date = userdate($post->modified, '', core_date::get_user_timezone($this->user));
$output .= '<div class="author">'.get_string('bynameondate', 'forum', $by).'</div>';
$output .= '</td></tr>';
$output .= '<tr><td class="left side" valign="top">';
$output .= '</td><td class="content">';
$output .= $formattedtext;
if (is_array($this->keyedfiles) && array_key_exists($post->id, $this->keyedfiles) && is_array($this->keyedfiles[$post->id]) && count($this->keyedfiles[$post->id]) > 0) {
$output .= '<div class="attachments">';
$output .= '<br /><b>' . get_string('attachments', 'forum') . '</b>:<br /><br />';
foreach ($this->keyedfiles[$post->id] as $file) {
$output .= $format->file_output($file) . '<br/ >';
}
$output .= "</div>";
}
$output .= '</td></tr></table>'."\n\n";
return $output;
}
/**
* @return string
*/
function get_sha1() {
$filesha = '';
try {
$filesha = $this->get_sha1_file();
} catch (portfolio_caller_exception $e) { } // no files
if ($this->post) {
return sha1($filesha . ',' . $this->post->subject . ',' . $this->post->message);
} else {
$sha1s = array($filesha);
foreach ($this->posts as $post) {
$sha1s[] = sha1($post->subject . ',' . $post->message);
}
return sha1(implode(',', $sha1s));
}
}
function expected_time() {
$filetime = $this->expected_time_file();
if ($this->posts) {
$posttime = portfolio_expected_time_db(count($this->posts));
if ($filetime < $posttime) {
return $posttime;
}
}
return $filetime;
}
/**
* @uses CONTEXT_MODULE
* @return bool
*/
function check_permissions() {
$context = context_module::instance($this->cm->id);
if ($this->post) {
return (has_capability('mod/forum:exportpost', $context)
|| ($this->post->userid == $this->user->id
&& has_capability('mod/forum:exportownpost', $context)));
}
return has_capability('mod/forum:exportdiscussion', $context);
}
/**
* @return string
*/
public static function display_name() {
return get_string('modulename', 'forum');
}
public static function base_supported_formats() {
return array(PORTFOLIO_FORMAT_FILE, PORTFOLIO_FORMAT_RICHHTML, PORTFOLIO_FORMAT_PLAINHTML, PORTFOLIO_FORMAT_LEAP2A);
}
}
/**
* Class representing the virtual node with all itemids in the file browser
*
* @category files
* @copyright 2012 David Mudrak <david@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
class forum_file_info_container extends file_info {
/** @var file_browser */
protected $browser;
/** @var stdClass */
protected $course;
/** @var stdClass */
protected $cm;
/** @var string */
protected $component;
/** @var stdClass */
protected $context;
/** @var array */
protected $areas;
/** @var string */
protected $filearea;
/**
* Constructor (in case you did not realize it ;-)
*
* @param file_browser $browser
* @param stdClass $course
* @param stdClass $cm
* @param stdClass $context
* @param array $areas
* @param string $filearea
*/
public function __construct($browser, $course, $cm, $context, $areas, $filearea) {
parent::__construct($browser, $context);
$this->browser = $browser;
$this->course = $course;
$this->cm = $cm;
$this->component = 'mod_forum';
$this->context = $context;
$this->areas = $areas;
$this->filearea = $filearea;
}
/**
* @return array with keys contextid, filearea, itemid, filepath and filename
*/
public function get_params() {
return array(
'contextid' => $this->context->id,
'component' => $this->component,
'filearea' => $this->filearea,
'itemid' => null,
'filepath' => null,
'filename' => null,
);
}
/**
* Can new files or directories be added via the file browser
*
* @return bool
*/
public function is_writable() {
return false;
}
/**
* Should this node be considered as a folder in the file browser
*
* @return bool
*/
public function is_directory() {
return true;
}
/**
* Returns localised visible name of this node
*
* @return string
*/
public function get_visible_name() {
return $this->areas[$this->filearea];
}
/**
* Returns list of children nodes
*
* @return array of file_info instances
*/
public function get_children() {
return $this->get_filtered_children('*', false, true);
}
/**
* Help function to return files matching extensions or their count
*
* @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
* @param bool|int $countonly if false returns the children, if an int returns just the
* count of children but stops counting when $countonly number of children is reached
* @param bool $returnemptyfolders if true returns items that don't have matching files inside
* @return array|int array of file_info instances or the count
*/
private function get_filtered_children($extensions = '*', $countonly = false, $returnemptyfolders = false) {
global $DB;
$params = array('contextid' => $this->context->id,
'component' => $this->component,
'filearea' => $this->filearea);
$sql = 'SELECT DISTINCT itemid
FROM {files}
WHERE contextid = :contextid
AND component = :component
AND filearea = :filearea';
if (!$returnemptyfolders) {
$sql .= ' AND filename <> :emptyfilename';
$params['emptyfilename'] = '.';
}
list($sql2, $params2) = $this->build_search_files_sql($extensions);
$sql .= ' '.$sql2;
$params = array_merge($params, $params2);
if ($countonly !== false) {
$sql .= ' ORDER BY itemid DESC';
}
$rs = $DB->get_recordset_sql($sql, $params);
$children = array();
foreach ($rs as $record) {
if (($child = $this->browser->get_file_info($this->context, 'mod_forum', $this->filearea, $record->itemid))
&& ($returnemptyfolders || $child->count_non_empty_children($extensions))) {
$children[] = $child;
}
if ($countonly !== false && count($children) >= $countonly) {
break;
}
}
$rs->close();
if ($countonly !== false) {
return count($children);
}
return $children;
}
/**
* Returns list of children which are either files matching the specified extensions
* or folders that contain at least one such file.
*
* @param string|array $extensions, either '*' or array of lowercase extensions, i.e. array('.gif','.jpg')
* @return array of file_info instances
*/
public function get_non_empty_children($extensions = '*') {
return $this->get_filtered_children($extensions, false);
}
/**
* Returns the number of children which are either files matching the specified extensions
* or folders containing at least one such file.
*
* @param string|array $extensions, for example '*' or array('.gif','.jpg')
* @param int $limit stop counting after at least $limit non-empty children are found
* @return int
*/
public function count_non_empty_children($extensions = '*', $limit = 1) {
return $this->get_filtered_children($extensions, $limit);
}
/**
* Returns parent file_info instance
*
* @return file_info or null for root
*/
public function get_parent() {
return $this->browser->get_file_info($this->context);
}
}
/**
* Returns forum posts tagged with a specified tag.
*
* This is a callback used by the tag area mod_forum/forum_posts to search for forum posts
* tagged with a specific tag.
*
* @param core_tag_tag $tag
* @param bool $exclusivemode if set to true it means that no other entities tagged with this tag
* are displayed on the page and the per-page limit may be bigger
* @param int $fromctx context id where the link was displayed, may be used by callbacks
* to display items in the same context first
* @param int $ctx context id where to search for records
* @param bool $rec search in subcontexts as well
* @param int $page 0-based number of page being displayed
* @return \core_tag\output\tagindex
*/
function mod_forum_get_tagged_posts($tag, $exclusivemode = false, $fromctx = 0, $ctx = 0, $rec = 1, $page = 0) {
global $OUTPUT;
$perpage = $exclusivemode ? 20 : 5;
// Build the SQL query.
$ctxselect = context_helper::get_preload_record_columns_sql('ctx');
$query = "SELECT fp.id, fp.subject, fd.forum, fp.discussion, f.type, fd.timestart, fd.timeend, fd.groupid, fd.firstpost,
fp.parent, fp.userid,
cm.id AS cmid, c.id AS courseid, c.shortname, c.fullname, $ctxselect
FROM {forum_posts} fp
JOIN {forum_discussions} fd ON fp.discussion = fd.id
JOIN {forum} f ON f.id = fd.forum
JOIN {modules} m ON m.name='forum'
JOIN {course_modules} cm ON cm.module = m.id AND cm.instance = f.id
JOIN {tag_instance} tt ON fp.id = tt.itemid
JOIN {course} c ON cm.course = c.id
JOIN {context} ctx ON ctx.instanceid = cm.id AND ctx.contextlevel = :coursemodulecontextlevel
WHERE tt.itemtype = :itemtype AND tt.tagid = :tagid AND tt.component = :component
AND cm.deletioninprogress = 0
AND fp.id %ITEMFILTER% AND c.id %COURSEFILTER%";
$params = array('itemtype' => 'forum_posts', 'tagid' => $tag->id, 'component' => 'mod_forum',
'coursemodulecontextlevel' => CONTEXT_MODULE);
if ($ctx) {
$context = $ctx ? context::instance_by_id($ctx) : context_system::instance();
$query .= $rec ? ' AND (ctx.id = :contextid OR ctx.path LIKE :path)' : ' AND ctx.id = :contextid';
$params['contextid'] = $context->id;
$params['path'] = $context->path.'/%';
}
$query .= " ORDER BY ";
if ($fromctx) {
// In order-clause specify that modules from inside "fromctx" context should be returned first.
$fromcontext = context::instance_by_id($fromctx);
$query .= ' (CASE WHEN ctx.id = :fromcontextid OR ctx.path LIKE :frompath THEN 0 ELSE 1 END),';
$params['fromcontextid'] = $fromcontext->id;
$params['frompath'] = $fromcontext->path.'/%';
}
$query .= ' c.sortorder, cm.id, fp.id';
$totalpages = $page + 1;
// Use core_tag_index_builder to build and filter the list of items.
$builder = new core_tag_index_builder('mod_forum', 'forum_posts', $query, $params, $page * $perpage, $perpage + 1);
while ($item = $builder->has_item_that_needs_access_check()) {
context_helper::preload_from_record($item);
$courseid = $item->courseid;
if (!$builder->can_access_course($courseid)) {
$builder->set_accessible($item, false);
continue;
}
$modinfo = get_fast_modinfo($builder->get_course($courseid));
// Set accessibility of this item and all other items in the same course.
$builder->walk(function ($taggeditem) use ($courseid, $modinfo, $builder, $item) {
// Checking permission for Q&A forums performs additional DB queries, do not do them in bulk.
if ($taggeditem->courseid == $courseid && ($taggeditem->type != 'qanda' || $taggeditem->id == $item->id)) {
$cm = $modinfo->get_cm($taggeditem->cmid);
$forum = (object)['id' => $taggeditem->forum,
'course' => $taggeditem->courseid,
'type' => $taggeditem->type
];
$discussion = (object)['id' => $taggeditem->discussion,
'timestart' => $taggeditem->timestart,
'timeend' => $taggeditem->timeend,
'groupid' => $taggeditem->groupid,
'firstpost' => $taggeditem->firstpost
];
$post = (object)['id' => $taggeditem->id,
'parent' => $taggeditem->parent,
'userid' => $taggeditem->userid,
'groupid' => $taggeditem->groupid
];
$accessible = forum_user_can_see_post($forum, $discussion, $post, null, $cm);
$builder->set_accessible($taggeditem, $accessible);
}
});
}
$items = $builder->get_items();
if (count($items) > $perpage) {
$totalpages = $page + 2; // We don't need exact page count, just indicate that the next page exists.
array_pop($items);
}
// Build the display contents.
if ($items) {
$tagfeed = new core_tag\output\tagfeed();
foreach ($items as $item) {
context_helper::preload_from_record($item);
$modinfo = get_fast_modinfo($item->courseid);
$cm = $modinfo->get_cm($item->cmid);
$pageurl = new moodle_url('/mod/forum/discuss.php', array('d' => $item->discussion), 'p' . $item->id);
$pagename = format_string($item->subject, true, array('context' => context_module::instance($item->cmid)));
$pagename = html_writer::link($pageurl, $pagename);
$courseurl = course_get_url($item->courseid, $cm->sectionnum);
$cmname = html_writer::link($cm->url, $cm->get_formatted_name());
$coursename = format_string($item->fullname, true, array('context' => context_course::instance($item->courseid)));
$coursename = html_writer::link($courseurl, $coursename);
$icon = html_writer::link($pageurl, html_writer::empty_tag('img', array('src' => $cm->get_icon_url())));
$tagfeed->add($icon, $pagename, $cmname.'<br>'.$coursename);
}
$content = $OUTPUT->render_from_template('core_tag/tagfeed',
$tagfeed->export_for_template($OUTPUT));
return new core_tag\output\tagindex($tag, 'mod_forum', 'forum_posts', $content,
$exclusivemode, $fromctx, $ctx, $rec, $page, $totalpages);
}
}
/**
* Update the calendar entries for this forum activity.
*
* @param stdClass $forum the row from the database table forum.
* @param int $cmid The coursemodule id
* @return bool
*/
function forum_update_calendar($forum, $cmid) {
global $DB, $CFG;
require_once($CFG->dirroot.'/calendar/lib.php');
$event = new stdClass();
if (!empty($forum->duedate)) {
$event->name = get_string('calendardue', 'forum', $forum->name);
$event->description = format_module_intro('forum', $forum, $cmid);
$event->courseid = $forum->course;
$event->modulename = 'forum';
$event->instance = $forum->id;
$event->type = CALENDAR_EVENT_TYPE_ACTION;
$event->eventtype = FORUM_EVENT_TYPE_DUE;
$event->timestart = $forum->duedate;
$event->timesort = $forum->duedate;
$event->visible = instance_is_visible('forum', $forum);
}
$event->id = $DB->get_field('event', 'id',
array('modulename' => 'forum', 'instance' => $forum->id, 'eventtype' => FORUM_EVENT_TYPE_DUE));
if ($event->id) {
$calendarevent = calendar_event::load($event->id);
if (!empty($forum->duedate)) {
// Calendar event exists so update it.
$calendarevent->update($event);
} else {
// Calendar event is no longer needed.
$calendarevent->delete();
}
} else if (!empty($forum->duedate)) {
// Event doesn't exist so create one.
calendar_event::create($event);
}
return true;
}