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301 lines
12 KiB
301 lines
12 KiB
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* Rating external API
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*
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* @package core_rating
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* @category external
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* @copyright 2015 Costantino Cito <ccito@cvaconsulting.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @since Moodle 2.9
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*/
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defined('MOODLE_INTERNAL') || die;
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require_once("$CFG->libdir/externallib.php");
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require_once("$CFG->dirroot/rating/lib.php");
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/**
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* Rating external functions
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*
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* @package core_rating
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* @category external
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* @copyright 2015 Costantino Cito <ccito@cvaconsulting.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @since Moodle 2.9
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*/
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class core_rating_external extends external_api {
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/**
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* Returns description of get_item_ratings parameters.
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*
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* @return external_function_parameters
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* @since Moodle 2.9
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*/
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public static function get_item_ratings_parameters() {
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return new external_function_parameters (
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array(
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'contextlevel' => new external_value(PARAM_ALPHA, 'context level: course, module, user, etc...'),
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'instanceid' => new external_value(PARAM_INT, 'the instance id of item associated with the context level'),
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'component' => new external_value(PARAM_COMPONENT, 'component'),
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'ratingarea' => new external_value(PARAM_AREA, 'rating area'),
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'itemid' => new external_value(PARAM_INT, 'associated id'),
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'scaleid' => new external_value(PARAM_INT, 'scale id'),
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'sort' => new external_value(PARAM_ALPHA, 'sort order (firstname, rating or timemodified)')
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)
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);
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}
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/**
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* Retrieve a list of ratings for a given item (forum post etc)
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*
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* @param string $contextlevel course, module, user...
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* @param int $instanceid the instance if for the context element
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* @param string $component the name of the component
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* @param string $ratingarea rating area
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* @param int $itemid the item id
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* @param int $scaleid the scale id
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* @param string $sort sql order (firstname, rating or timemodified)
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* @return array Result and possible warnings
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* @throws moodle_exception
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* @since Moodle 2.9
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*/
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public static function get_item_ratings($contextlevel, $instanceid, $component, $ratingarea, $itemid, $scaleid, $sort) {
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global $USER, $PAGE;
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$warnings = array();
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$arrayparams = array(
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'contextlevel' => $contextlevel,
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'instanceid' => $instanceid,
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'component' => $component,
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'ratingarea' => $ratingarea,
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'itemid' => $itemid,
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'scaleid' => $scaleid,
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'sort' => $sort
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);
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// Validate and normalize parameters.
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$params = self::validate_parameters(self::get_item_ratings_parameters(), $arrayparams);
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$context = self::get_context_from_params($params);
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self::validate_context($context);
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// Minimal capability required.
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$callbackparams = array('contextid' => $context->id,
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'component' => $component,
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'ratingarea' => $ratingarea,
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'itemid' => $itemid,
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'scaleid' => $scaleid);
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if (!has_capability('moodle/rating:view', $context) ||
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!component_callback($component, 'rating_can_see_item_ratings', array($callbackparams), true)) {
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throw new moodle_exception('noviewrate', 'rating');
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}
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list($context, $course, $cm) = get_context_info_array($context->id);
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// Can we see all ratings?
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$canviewallratings = has_capability('moodle/rating:viewall', $context);
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// Create the Sql sort order string.
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switch ($params['sort']) {
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case 'firstname':
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$sqlsort = "u.firstname ASC";
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break;
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case 'rating':
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$sqlsort = "r.rating ASC";
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break;
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default:
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$sqlsort = "r.timemodified ASC";
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}
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$ratingoptions = new stdClass;
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$ratingoptions->context = $context;
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$ratingoptions->component = $params['component'];
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$ratingoptions->ratingarea = $params['ratingarea'];
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$ratingoptions->itemid = $params['itemid'];
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$ratingoptions->sort = $sqlsort;
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$rm = new rating_manager();
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$ratings = $rm->get_all_ratings_for_item($ratingoptions);
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$scalemenu = make_grades_menu($params['scaleid']);
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// If the scale was changed after ratings were submitted some ratings may have a value above the current maximum.
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// We can't just do count($scalemenu) - 1 as custom scales start at index 1, not 0.
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$maxrating = max(array_keys($scalemenu));
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$results = array();
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foreach ($ratings as $rating) {
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if ($canviewallratings || $USER->id == $rating->userid) {
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if ($rating->rating > $maxrating) {
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$rating->rating = $maxrating;
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}
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// The rating object has all the required fields for generating the picture url.
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$userpicture = new user_picture($rating);
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$userpicture->size = 1; // Size f1.
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$profileimageurl = $userpicture->get_url($PAGE)->out(false);
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$result = array();
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$result['id'] = $rating->id;
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$result['userid'] = $rating->userid;
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$result['userpictureurl'] = $profileimageurl;
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$result['userfullname'] = fullname($rating);
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$result['rating'] = $scalemenu[$rating->rating];
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$result['timemodified'] = $rating->timemodified;
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$results[] = $result;
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}
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}
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return array(
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'ratings' => $results,
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'warnings' => $warnings
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);
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}
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/**
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* Returns description of get_item_ratings result values.
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*
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* @return external_single_structure
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* @since Moodle 2.9
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*/
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public static function get_item_ratings_returns() {
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return new external_single_structure(
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array(
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'ratings' => 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, 'rating id'),
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'userid' => new external_value(PARAM_INT, 'user id'),
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'userpictureurl' => new external_value(PARAM_URL, 'URL user picture'),
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'userfullname' => new external_value(PARAM_NOTAGS, 'user fullname'),
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'rating' => new external_value(PARAM_NOTAGS, 'rating on scale'),
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'timemodified' => new external_value(PARAM_INT, 'time modified (timestamp)')
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), 'Rating'
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), 'list of ratings'
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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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* Returns description of add_rating parameters.
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*
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* @return external_function_parameters
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* @since Moodle 3.2
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*/
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public static function add_rating_parameters() {
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return new external_function_parameters (
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array(
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'contextlevel' => new external_value(PARAM_ALPHA, 'context level: course, module, user, etc...'),
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'instanceid' => new external_value(PARAM_INT, 'the instance id of item associated with the context level'),
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'component' => new external_value(PARAM_COMPONENT, 'component'),
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'ratingarea' => new external_value(PARAM_AREA, 'rating area'),
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'itemid' => new external_value(PARAM_INT, 'associated id'),
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'scaleid' => new external_value(PARAM_INT, 'scale id'),
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'rating' => new external_value(PARAM_INT, 'user rating'),
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'rateduserid' => new external_value(PARAM_INT, 'rated user id'),
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'aggregation' => new external_value(PARAM_INT, 'agreggation method', VALUE_DEFAULT, RATING_AGGREGATE_NONE)
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)
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);
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}
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/**
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* Adds a rating to an item
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*
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* @param string $contextlevel course, module, user...
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* @param int $instanceid the instance if for the context element
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* @param string $component the name of the component
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* @param string $ratingarea rating area
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* @param int $itemid the item id
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* @param int $scaleid the scale id
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* @param int $rating the user rating
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* @param int $rateduserid the rated user id
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* @param int $aggregation the aggregation method
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* @return array result and possible warnings
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* @throws moodle_exception
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* @since Moodle 3.2
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*/
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public static function add_rating($contextlevel, $instanceid, $component, $ratingarea, $itemid, $scaleid, $rating, $rateduserid,
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$aggregation = RATING_AGGREGATE_NONE) {
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$warnings = array();
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$params = array(
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'contextlevel' => $contextlevel,
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'instanceid' => $instanceid,
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'component' => $component,
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'ratingarea' => $ratingarea,
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'itemid' => $itemid,
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'scaleid' => $scaleid,
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'rating' => $rating,
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'rateduserid' => $rateduserid,
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'aggregation' => $aggregation,
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);
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// Validate and normalize parameters.
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$params = self::validate_parameters(self::add_rating_parameters(), $params);
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$context = self::get_context_from_params($params);
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self::validate_context($context);
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$cm = get_coursemodule_from_id(false, $context->instanceid, 0, false, MUST_EXIST);
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require_capability('moodle/rating:rate', $context);
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$rm = new rating_manager();
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$result = $rm->add_rating($cm, $context, $params['component'], $params['ratingarea'], $params['itemid'], $params['scaleid'],
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$params['rating'], $params['rateduserid'], $params['aggregation']);
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if (!empty($result->error)) {
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throw new moodle_exception($result->error, 'rating');
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}
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$returndata = array(
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'success' => $result->success,
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'warnings' => $warnings
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);
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if (isset($result->aggregate)) {
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$returndata['aggregate'] = $result->aggregate;
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$returndata['count'] = $result->count;
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$returndata['itemid'] = $result->itemid;
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}
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return $returndata;
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}
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/**
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* Returns description of add_rating result values.
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*
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* @return external_single_structure
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* @since Moodle 3.2
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*/
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public static function add_rating_returns() {
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return new external_single_structure(
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array(
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'success' => new external_value(PARAM_BOOL, 'Whether the rate was successfully created'),
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'aggregate' => new external_value(PARAM_TEXT, 'New aggregate', VALUE_OPTIONAL),
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'count' => new external_value(PARAM_INT, 'Ratings count', VALUE_OPTIONAL),
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'itemid' => new external_value(PARAM_INT, 'Rating item id', VALUE_OPTIONAL),
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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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