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MDL-46458 forum: New WS get_forum_discussions_paginated
This commit is contained in:
Juan Leyva
parent
6597413d41
commit
7c51b40ab1
@ -520,4 +520,237 @@ class mod_forum_external extends external_api {
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);
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}
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/**
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* Describes the parameters for get_forum_discussions_paginated.
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*
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* @return external_external_function_parameters
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* @since Moodle 2.8
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*/
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public static function get_forum_discussions_paginated_parameters() {
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return new external_function_parameters (
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array(
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'forumid' => new external_value(PARAM_INT, 'forum instance id', VALUE_REQUIRED),
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'sortby' => new external_value(PARAM_ALPHA,
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'sort by this element: id, timemodified, timestart or timeend', VALUE_DEFAULT, 'timemodified'),
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'sortdirection' => new external_value(PARAM_ALPHA, 'sort direction: ASC or DESC', VALUE_DEFAULT, 'DESC'),
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'page' => new external_value(PARAM_INT, 'current page', VALUE_DEFAULT, -1),
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'perpage' => new external_value(PARAM_INT, 'items per page', VALUE_DEFAULT, 0),
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)
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);
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}
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/**
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* Returns a list of forum discussions optionally sorted and paginated.
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*
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* @param int $forumid the forum instance id
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* @param string $sortby sort by this element (id, timemodified, timestart or timeend)
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* @param string $sortdirection sort direction: ASC or DESC
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* @param int $page page number
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* @param int $perpage items per page
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*
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* @return array the forum discussion details including warnings
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* @since Moodle 2.8
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*/
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public static function get_forum_discussions_paginated($forumid, $sortby = 'timemodified', $sortdirection = 'DESC',
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$page = -1, $perpage = 0) {
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global $CFG, $DB, $USER;
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require_once($CFG->dirroot . "/mod/forum/lib.php");
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$warnings = array();
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$params = self::validate_parameters(self::get_forum_discussions_paginated_parameters(),
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array(
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'forumid' => $forumid,
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'sortby' => $sortby,
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'sortdirection' => $sortdirection,
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'page' => $page,
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'perpage' => $perpage
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)
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);
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// Compact/extract functions are not recommended.
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$forumid = $params['forumid'];
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$sortby = $params['sortby'];
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$sortdirection = $params['sortdirection'];
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$page = $params['page'];
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$perpage = $params['perpage'];
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$sortallowedvalues = array('id', 'timemodified', 'timestart', 'timeend');
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if (!in_array($sortby, $sortallowedvalues)) {
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throw new invalid_parameter_exception('Invalid value for sortby parameter (value: ' . $sortby . '),' .
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'allowed values are: ' . implode(',', $sortallowedvalues));
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}
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$sortdirection = strtoupper($sortdirection);
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$directionallowedvalues = array('ASC', 'DESC');
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if (!in_array($sortdirection, $directionallowedvalues)) {
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throw new invalid_parameter_exception('Invalid value for sortdirection parameter (value: ' . $sortdirection . '),' .
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'allowed values are: ' . implode(',', $directionallowedvalues));
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}
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$forum = $DB->get_record('forum', array('id' => $forumid), '*', MUST_EXIST);
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$course = $DB->get_record('course', array('id' => $forum->course), '*', MUST_EXIST);
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$cm = get_coursemodule_from_instance('forum', $forum->id, $course->id, false, MUST_EXIST);
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// Validate the module context. It checks everything that affects the module visibility (including groupings, etc..).
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$modcontext = context_module::instance($cm->id);
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self::validate_context($modcontext);
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// Check they have the view forum capability.
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require_capability('mod/forum:viewdiscussion', $modcontext, null, true, 'noviewdiscussionspermission', 'forum');
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$sort = 'd.' . $sortby . ' ' . $sortdirection;
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$discussions = forum_get_discussions($cm, $sort, true, -1, -1, true, $page, $perpage);
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if ($discussions) {
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$canviewfullname = has_capability('moodle/site:viewfullnames', $modcontext);
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// Get the unreads array, this takes a forum id and returns data for all discussions.
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$unreads = array();
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if ($cantrack = forum_tp_can_track_forums($forum)) {
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if ($forumtracked = forum_tp_is_tracked($forum)) {
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$unreads = forum_get_discussions_unread($cm);
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}
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}
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// The forum function returns the replies for all the discussions in a given forum.
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$replies = forum_count_discussion_replies($forumid, $sort, -1, $page, $perpage);
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foreach ($discussions as $did => $discussion) {
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// This function checks for qanda forums.
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if (!forum_user_can_see_discussion($forum, $discussion, $modcontext)) {
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$warning = array();
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// Function forum_get_discussions returns forum_posts ids not forum_discussions ones.
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$warning['item'] = 'post';
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$warning['itemid'] = $discussion->id;
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$warning['warningcode'] = '1';
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$warning['message'] = 'You can\'t see this discussion';
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$warnings[] = $warning;
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continue;
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}
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$discussion->numunread = 0;
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if ($cantrack && $forumtracked) {
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if (isset($unreads[$discussion->discussion])) {
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$discussion->numunread = (int) $unreads[$discussion->discussion];
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}
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}
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$discussion->numreplies = 0;
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if (!empty($replies[$discussion->discussion])) {
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$discussion->numreplies = (int) $replies[$discussion->discussion]->replies;
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}
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// Load user objects from the results of the query.
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$user = new stdclass();
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$user->id = $discussion->userid;
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$user = username_load_fields_from_object($user, $discussion);
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$discussion->userfullname = fullname($user, $canviewfullname);
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$discussion->userpictureurl = moodle_url::make_pluginfile_url(
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context_user::instance($user->id)->id, 'user', 'icon', null, '/', 'f1');
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// Fix the pluginfile.php link.
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$discussion->userpictureurl = str_replace("pluginfile.php", "webservice/pluginfile.php",
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$discussion->userpictureurl);
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$usermodified = new stdclass();
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$usermodified->id = $discussion->usermodified;
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$usermodified = username_load_fields_from_object($usermodified, $discussion, 'um');
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$discussion->usermodifiedfullname = fullname($usermodified, $canviewfullname);
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$discussion->usermodifiedpictureurl = moodle_url::make_pluginfile_url(
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context_user::instance($usermodified->id)->id, 'user', 'icon', null, '/', 'f1');
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// Fix the pluginfile.php link.
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$discussion->usermodifiedpictureurl = str_replace("pluginfile.php", "webservice/pluginfile.php",
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$discussion->usermodifiedpictureurl);
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// Rewrite embedded images URLs.
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list($discussion->message, $discussion->messageformat) =
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external_format_text($discussion->message, $discussion->messageformat,
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$modcontext->id, 'mod_forum', 'post', $discussion->id);
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// List attachments.
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if (!empty($discussion->attachment)) {
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$discussion->attachments = array();
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$fs = get_file_storage();
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if ($files = $fs->get_area_files($modcontext->id, 'mod_forum', 'attachment',
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$discussion->id, "filename", false)) {
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foreach ($files as $file) {
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$filename = $file->get_filename();
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$discussion->attachments[] = array(
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'filename' => $filename,
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'mimetype' => $file->get_mimetype(),
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'fileurl' => file_encode_url($CFG->wwwroot.'/webservice/pluginfile.php',
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'/'.$modcontext->id.'/mod_forum/attachment/'.$discussion->id.'/'.$filename)
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);
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}
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}
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}
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$discussions[$did] = (array) $discussion;
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}
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}
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$result = array();
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$result['discussions'] = $discussions;
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$result['warnings'] = $warnings;
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return $result;
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}
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/**
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* Describes the get_forum_discussions_paginated return value.
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*
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* @return external_single_structure
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* @since Moodle 2.8
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*/
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public static function get_forum_discussions_paginated_returns() {
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return new external_single_structure(
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array(
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'discussions' => new external_multiple_structure(
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new external_single_structure(
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array(
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'id' => new external_value(PARAM_INT, 'Post id'),
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'name' => new external_value(PARAM_TEXT, 'Discussion name'),
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'groupid' => new external_value(PARAM_INT, 'Group id'),
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'timemodified' => new external_value(PARAM_INT, 'Time modified'),
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'usermodified' => new external_value(PARAM_INT, 'The id of the user who last modified'),
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'timestart' => new external_value(PARAM_INT, 'Time discussion can start'),
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'timeend' => new external_value(PARAM_INT, 'Time discussion ends'),
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'discussion' => new external_value(PARAM_INT, 'Discussion id'),
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'parent' => new external_value(PARAM_INT, 'Parent id'),
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'userid' => new external_value(PARAM_INT, 'User who started the discussion id'),
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'created' => new external_value(PARAM_INT, 'Creation time'),
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'modified' => new external_value(PARAM_INT, 'Time modified'),
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'mailed' => new external_value(PARAM_INT, 'Mailed?'),
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'subject' => new external_value(PARAM_TEXT, 'The post subject'),
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'message' => new external_value(PARAM_RAW, 'The post message'),
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'messageformat' => new external_format_value('message'),
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'messagetrust' => new external_value(PARAM_INT, 'Can we trust?'),
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'attachment' => new external_value(PARAM_RAW, 'Has attachments?'),
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'attachments' => new external_multiple_structure(
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new external_single_structure(
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array (
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'filename' => new external_value(PARAM_FILE, 'file name'),
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'mimetype' => new external_value(PARAM_RAW, 'mime type'),
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'fileurl' => new external_value(PARAM_URL, 'file download url')
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)
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), 'attachments', VALUE_OPTIONAL
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),
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'totalscore' => new external_value(PARAM_INT, 'The post message total score'),
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'mailnow' => new external_value(PARAM_INT, 'Mail now?'),
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'userfullname' => new external_value(PARAM_TEXT, 'Post author full name'),
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'usermodifiedfullname' => new external_value(PARAM_TEXT, 'Post modifier full name'),
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'userpictureurl' => new external_value(PARAM_URL, 'Post author picture.'),
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'usermodifiedpictureurl' => new external_value(PARAM_URL, 'Post modifier picture.'),
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'numreplies' => new external_value(PARAM_TEXT, 'The number of replies in the discussion'),
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'numunread' => new external_value(PARAM_INT, 'The number of unread discussions.')
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), 'post'
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)
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),
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'warnings' => new external_warnings()
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)
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);
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}
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}
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