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429 lines
19 KiB
429 lines
19 KiB
2 years ago
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<?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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* Class communication
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*
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* @package core
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* @copyright 2017 Marina Glancy
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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namespace core\hub;
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defined('MOODLE_INTERNAL') || die();
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use webservice_xmlrpc_client;
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use moodle_exception;
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use curl;
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use stdClass;
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use coding_exception;
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use moodle_url;
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/**
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* Methods to communicate with moodle.net web services
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*
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* @package core
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* @copyright 2017 Marina Glancy
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class api {
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/** @var File type: Course screenshot */
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const HUB_SCREENSHOT_FILE_TYPE = 'screenshot';
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/** @var File type: Hub screenshot */
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const HUB_HUBSCREENSHOT_FILE_TYPE = 'hubscreenshot';
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/** @var File type: Backup */
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const HUB_BACKUP_FILE_TYPE = 'backup';
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/**
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* Calls moodle.net WS
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*
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* @param string $function name of WS function
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* @param array $data parameters of WS function
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* @param bool $allowpublic allow request without moodle.net registration
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* @return mixed depends on the function
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* @throws moodle_exception
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*/
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protected static function call($function, array $data = [], $allowpublic = false) {
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$token = registration::get_token() ?: 'publichub';
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if (!$allowpublic && $token === 'publichub') {
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// This will throw an exception.
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registration::require_registration();
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}
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return self::call_rest($token, $function, $data);
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}
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/**
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* Performs REST request to moodle.net (using GET method)
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*
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* @param string $token
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* @param string $function
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* @param array $data
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* @return mixed
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* @throws moodle_exception
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*/
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protected static function call_rest($token, $function, array $data) {
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$params = [
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'wstoken' => $token,
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'wsfunction' => $function,
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'moodlewsrestformat' => 'json'
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] + $data;
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$curl = new curl();
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$serverurl = HUB_MOODLEORGHUBURL . "/local/hub/webservice/webservices.php";
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$curloutput = @json_decode($curl->get($serverurl, $params), true);
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$info = $curl->get_info();
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if ($curl->get_errno()) {
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// Connection error.
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throw new moodle_exception('errorconnect', 'hub', '', $curl->error);
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} else if (isset($curloutput['exception'])) {
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// Exception occurred on moodle.net .
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self::process_curl_exception($token, $curloutput);
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} else if ($info['http_code'] != 200) {
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throw new moodle_exception('errorconnect', 'hub', '', $info['http_code']);
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} else {
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return $curloutput;
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}
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}
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/**
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* Analyses exception received from moodle.net
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*
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* @param string $token token used for CURL request
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* @param array $curloutput output from CURL request
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* @throws moodle_exception
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*/
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protected static function process_curl_exception($token, $curloutput) {
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if (!isset($curloutput['exception'])) {
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return;
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}
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if ($token === registration::get_token()) {
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// Check if registration token was rejected or there are other problems with registration.
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if (($curloutput['exception'] === 'moodle_exception' && $curloutput['errorcode'] === 'invalidtoken')
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|| $curloutput['exception'] === 'registration_exception') {
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// Force admin to repeat site registration process.
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registration::reset_token();
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throw new moodle_exception('errorwstokenreset', 'hub', '', $curloutput['message']);
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}
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}
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throw new moodle_exception('errorws', 'hub', '', $curloutput['message']);
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}
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/**
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* Update site registration on moodle.net
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*
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* @param array $siteinfo
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* @throws moodle_exception
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*/
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public static function update_registration(array $siteinfo) {
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$params = array('siteinfo' => $siteinfo, 'validateurl' => 1);
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self::call('hub_update_site_info', $params);
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}
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/**
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* Returns information about moodle.net
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*
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* Example of the return array:
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* {
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* "courses": 384,
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* "description": "Moodle.net connects you with free content and courses shared by Moodle ...",
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* "downloadablecourses": 190,
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* "enrollablecourses": 194,
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* "hublogo": 1,
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* "language": "en",
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* "name": "Moodle.net",
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* "sites": 274175,
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* "url": "https://moodle.net",
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* "imgurl": "https://moodle.net/local/hub/webservice/download.php?filetype=hubscreenshot"
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* }
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*
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* @return array
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* @throws moodle_exception
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*/
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public static function get_hub_info() {
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$info = self::call('hub_get_info', [], true);
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$info['imgurl'] = new moodle_url(HUB_MOODLEORGHUBURL . '/local/hub/webservice/download.php',
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['filetype' => self::HUB_HUBSCREENSHOT_FILE_TYPE]);
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return $info;
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}
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/**
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* Calls WS function hub_get_courses
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*
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* Parameter $options may have any of these fields:
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* [
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* 'ids' => new external_multiple_structure(new external_value(PARAM_INTEGER, 'id of a course in the hub course
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* directory'), 'ids of course', VALUE_OPTIONAL),
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* 'sitecourseids' => new external_multiple_structure(new external_value(PARAM_INTEGER, 'id of a course in the
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* site'), 'ids of course in the site', VALUE_OPTIONAL),
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* 'coverage' => new external_value(PARAM_TEXT, 'coverage', VALUE_OPTIONAL),
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* 'licenceshortname' => new external_value(PARAM_ALPHANUMEXT, 'licence short name', VALUE_OPTIONAL),
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* 'subject' => new external_value(PARAM_ALPHANUM, 'subject', VALUE_OPTIONAL),
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* 'audience' => new external_value(PARAM_ALPHA, 'audience', VALUE_OPTIONAL),
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* 'educationallevel' => new external_value(PARAM_ALPHA, 'educational level', VALUE_OPTIONAL),
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* 'language' => new external_value(PARAM_ALPHANUMEXT, 'language', VALUE_OPTIONAL),
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* 'orderby' => new external_value(PARAM_ALPHA, 'orderby method: newest, eldest, publisher, fullname,
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* ratingaverage', VALUE_OPTIONAL),
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* 'givememore' => new external_value(PARAM_INT, 'next range of result - range size being set by the hub
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* server ', VALUE_OPTIONAL),
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* 'allsitecourses' => new external_value(PARAM_INTEGER,
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* 'if 1 return all not visible and visible courses whose siteid is the site
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* matching token. Only courses of this site are returned.
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* givememore parameter is ignored if this param = 1.
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* In case of public token access, this param option is ignored', VALUE_DEFAULT, 0),
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* ]
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*
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* Each course in the returned array of courses will have fields:
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* [
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* 'id' => new external_value(PARAM_INTEGER, 'id'),
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* 'fullname' => new external_value(PARAM_TEXT, 'course name'),
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* 'shortname' => new external_value(PARAM_TEXT, 'course short name'),
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* 'description' => new external_value(PARAM_TEXT, 'course description'),
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* 'language' => new external_value(PARAM_ALPHANUMEXT, 'course language'),
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* 'publishername' => new external_value(PARAM_TEXT, 'publisher name'),
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* 'publisheremail' => new external_value(PARAM_EMAIL, 'publisher email', VALUE_OPTIONAL),
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* 'privacy' => new external_value(PARAM_INT, 'privacy: published or not', VALUE_OPTIONAL),
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* 'sitecourseid' => new external_value(PARAM_INT, 'course id on the site', VALUE_OPTIONAL),
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* 'contributornames' => new external_value(PARAM_TEXT, 'contributor names', VALUE_OPTIONAL),
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* 'coverage' => new external_value(PARAM_TEXT, 'coverage', VALUE_OPTIONAL),
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* 'creatorname' => new external_value(PARAM_TEXT, 'creator name'),
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* 'licenceshortname' => new external_value(PARAM_ALPHANUMEXT, 'licence short name'),
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* 'subject' => new external_value(PARAM_ALPHANUM, 'subject'),
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* 'audience' => new external_value(PARAM_ALPHA, 'audience'),
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* 'educationallevel' => new external_value(PARAM_ALPHA, 'educational level'),
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* 'creatornotes' => new external_value(PARAM_RAW, 'creator notes'),
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* 'creatornotesformat' => new external_value(PARAM_INTEGER, 'notes format'),
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* 'demourl' => new external_value(PARAM_URL, 'demo URL', VALUE_OPTIONAL),
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* 'courseurl' => new external_value(PARAM_URL, 'course URL', VALUE_OPTIONAL),
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* 'backupsize' => new external_value(PARAM_INT, 'course backup size in bytes', VALUE_OPTIONAL),
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* 'enrollable' => new external_value(PARAM_BOOL, 'is the course enrollable'),
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* 'screenshots' => new external_value(PARAM_INT, 'total number of screenshots'),
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* 'timemodified' => new external_value(PARAM_INT, 'time of last modification - timestamp'),
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* 'contents' => new external_multiple_structure(new external_single_structure(
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* array(
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* 'moduletype' => new external_value(PARAM_ALPHA, 'the type of module (activity/block)'),
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* 'modulename' => new external_value(PARAM_TEXT, 'the name of the module (forum, resource etc)'),
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* 'contentcount' => new external_value(PARAM_INT, 'how many time the module is used in the course'),
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* )), 'contents', VALUE_OPTIONAL),
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* 'rating' => new external_single_structure (
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* array(
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* 'aggregate' => new external_value(PARAM_FLOAT, 'Rating average', VALUE_OPTIONAL),
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* 'scaleid' => new external_value(PARAM_INT, 'Rating scale'),
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* 'count' => new external_value(PARAM_INT, 'Rating count'),
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* ), 'rating', VALUE_OPTIONAL),
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* 'comments' => new external_multiple_structure(new external_single_structure (
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* array(
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* 'comment' => new external_value(PARAM_TEXT, 'the comment'),
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* 'commentator' => new external_value(PARAM_TEXT, 'the name of commentator'),
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* 'date' => new external_value(PARAM_INT, 'date of the comment'),
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* )), 'contents', VALUE_OPTIONAL),
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* 'outcomes' => new external_multiple_structure(new external_single_structure(
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* array(
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* 'fullname' => new external_value(PARAM_TEXT, 'the outcome fullname')
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* )), 'outcomes', VALUE_OPTIONAL)
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* ]
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*
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* Additional fields for each course:
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* 'screenshotbaseurl' (moodle_url) URL of the first screenshot, only set if $course['screenshots']>0
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* 'commenturl' (moodle_url) URL for comments
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*
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* @param string $search search string
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* @param bool $downloadable return downloadable courses
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* @param bool $enrollable return enrollable courses
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* @param array|\stdClass $options other options from the list of allowed options:
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* 'ids', 'sitecourseids', 'coverage', 'licenceshortname', 'subject', 'audience',
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* 'educationallevel', 'language', 'orderby', 'givememore', 'allsitecourses'
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* @return array of two elements: [$courses, $coursetotal]
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* @throws \coding_exception
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* @throws moodle_exception
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*/
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public static function get_courses($search, $downloadable, $enrollable, $options) {
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static $availableoptions = ['ids', 'sitecourseids', 'coverage', 'licenceshortname', 'subject', 'audience',
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'educationallevel', 'language', 'orderby', 'givememore', 'allsitecourses'];
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if (empty($options)) {
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$options = [];
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} else if (is_object($options)) {
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$options = (array)$options;
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} else if (!is_array($options)) {
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throw new \coding_exception('Parameter $options is invalid');
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}
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if ($unknownkeys = array_diff(array_keys($options), $availableoptions)) {
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throw new \coding_exception('Unknown option(s): ' . join(', ', $unknownkeys));
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}
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$params = [
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'search' => $search,
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'downloadable' => (int)(bool)$downloadable,
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'enrollable' => (int)(bool)$enrollable,
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'options' => $options
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];
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$result = self::call('hub_get_courses', $params, true);
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$courses = $result['courses'];
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$coursetotal = $result['coursetotal'];
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foreach ($courses as $idx => $course) {
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$courses[$idx]['screenshotbaseurl'] = null;
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if (!empty($course['screenshots'])) {
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$courses[$idx]['screenshotbaseurl'] = new moodle_url(HUB_MOODLEORGHUBURL . '/local/hub/webservice/download.php',
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array('courseid' => $course['id'],
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'filetype' => self::HUB_SCREENSHOT_FILE_TYPE));
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}
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$courses[$idx]['commenturl'] = new moodle_url(HUB_MOODLEORGHUBURL,
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array('courseid' => $course['id'], 'mustbelogged' => true));
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}
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return [$courses, $coursetotal];
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}
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/**
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* Unregister the site
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*
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* @throws moodle_exception
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*/
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public static function unregister_site() {
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global $CFG;
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self::call('hub_unregister_site', ['url' => [$CFG->wwwroot]]);
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}
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/**
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* Unpublish courses
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*
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* @param int[]|int $courseids
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* @throws moodle_exception
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*/
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public static function unregister_courses($courseids) {
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$courseids = (array)$courseids;
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$params = array('courseids' => $courseids);
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self::call('hub_unregister_courses', $params);
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}
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/**
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* Publish one course
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*
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* Expected contents of $courseinfo:
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* [
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* 'sitecourseid' => new external_value(PARAM_INT, 'the id of the course on the publishing site'),
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* 'fullname' => new external_value(PARAM_TEXT, 'course name'),
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* 'shortname' => new external_value(PARAM_TEXT, 'course short name'),
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* 'description' => new external_value(PARAM_TEXT, 'course description'),
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* 'language' => new external_value(PARAM_ALPHANUMEXT, 'course language'),
|
||
|
|
* 'publishername' => new external_value(PARAM_TEXT, 'publisher name'),
|
||
|
|
* 'publisheremail' => new external_value(PARAM_EMAIL, 'publisher email'),
|
||
|
|
* 'contributornames' => new external_value(PARAM_TEXT, 'contributor names'),
|
||
|
|
* 'coverage' => new external_value(PARAM_TEXT, 'coverage'),
|
||
|
|
* 'creatorname' => new external_value(PARAM_TEXT, 'creator name'),
|
||
|
|
* 'licenceshortname' => new external_value(PARAM_ALPHANUMEXT, 'licence short name'),
|
||
|
|
* 'subject' => new external_value(PARAM_ALPHANUM, 'subject'),
|
||
|
|
* 'audience' => new external_value(PARAM_ALPHA, 'audience'),
|
||
|
|
* 'educationallevel' => new external_value(PARAM_ALPHA, 'educational level'),
|
||
|
|
* 'creatornotes' => new external_value(PARAM_RAW, 'creator notes'),
|
||
|
|
* 'creatornotesformat' => new external_value(PARAM_INTEGER, 'notes format'),
|
||
|
|
* 'demourl' => new external_value(PARAM_URL, 'demo URL', VALUE_OPTIONAL),
|
||
|
|
* 'courseurl' => new external_value(PARAM_URL, 'course URL', VALUE_OPTIONAL),
|
||
|
|
* 'enrollable' => new external_value(PARAM_BOOL, 'is the course enrollable', VALUE_DEFAULT, 0),
|
||
|
|
* 'screenshots' => new external_value(PARAM_INT, 'the number of screenhots', VALUE_OPTIONAL),
|
||
|
|
* 'deletescreenshots' => new external_value(PARAM_INT, 'ask to delete all the existing screenshot files
|
||
|
|
* (it does not reset the screenshot number)', VALUE_DEFAULT, 0),
|
||
|
|
* 'contents' => new external_multiple_structure(new external_single_structure(
|
||
|
|
* array(
|
||
|
|
* 'moduletype' => new external_value(PARAM_ALPHA, 'the type of module (activity/block)'),
|
||
|
|
* 'modulename' => new external_value(PARAM_TEXT, 'the name of the module (forum, resource etc)'),
|
||
|
|
* 'contentcount' => new external_value(PARAM_INT, 'how many time the module is used in the course'),
|
||
|
|
* )), 'contents', VALUE_OPTIONAL),
|
||
|
|
* 'outcomes' => new external_multiple_structure(new external_single_structure(
|
||
|
|
* array(
|
||
|
|
* 'fullname' => new external_value(PARAM_TEXT, 'the outcome fullname')
|
||
|
|
* )), 'outcomes', VALUE_OPTIONAL)
|
||
|
|
* ]
|
||
|
|
*
|
||
|
|
* @param array|\stdClass $courseinfo
|
||
|
|
* @return int id of the published course on the hub
|
||
|
|
* @throws moodle_exception if communication to moodle.net failed or course could not be published
|
||
|
|
*/
|
||
|
|
public static function register_course($courseinfo) {
|
||
|
|
$params = array('courses' => array($courseinfo));
|
||
|
|
$hubcourseids = self::call('hub_register_courses', $params);
|
||
|
|
if (count($hubcourseids) != 1) {
|
||
|
|
throw new moodle_exception('errorcoursewronglypublished', 'hub');
|
||
|
|
}
|
||
|
|
return $hubcourseids[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uploads a screenshot for the published course
|
||
|
|
*
|
||
|
|
* @param int $hubcourseid id of the published course on moodle.net, it must be published from this site
|
||
|
|
* @param \stored_file $file
|
||
|
|
* @param int $screenshotnumber ordinal number of the screenshot
|
||
|
|
*/
|
||
|
|
public static function add_screenshot($hubcourseid, \stored_file $file, $screenshotnumber) {
|
||
|
|
$curl = new \curl();
|
||
|
|
$params = array();
|
||
|
|
$params['filetype'] = self::HUB_SCREENSHOT_FILE_TYPE;
|
||
|
|
$params['file'] = $file;
|
||
|
|
$params['courseid'] = $hubcourseid;
|
||
|
|
$params['filename'] = $file->get_filename();
|
||
|
|
$params['screenshotnumber'] = $screenshotnumber;
|
||
|
|
$params['token'] = registration::get_token(MUST_EXIST);
|
||
|
|
$curl->post(HUB_MOODLEORGHUBURL . "/local/hub/webservice/upload.php", $params);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Downloads course backup
|
||
|
|
*
|
||
|
|
* @param int $hubcourseid id of the course on moodle.net
|
||
|
|
* @param string $path local path (in tempdir) to save the downloaded backup to.
|
||
|
|
*/
|
||
|
|
public static function download_course_backup($hubcourseid, $path) {
|
||
|
|
$fp = fopen($path, 'w');
|
||
|
|
|
||
|
|
$curlurl = new \moodle_url(HUB_MOODLEORGHUBURL . '/local/hub/webservice/download.php',
|
||
|
|
['filetype' => self::HUB_BACKUP_FILE_TYPE, 'courseid' => $hubcourseid]);
|
||
|
|
|
||
|
|
// Send an identification token if the site is registered.
|
||
|
|
if ($token = registration::get_token()) {
|
||
|
|
$curlurl->param('token', $token);
|
||
|
|
}
|
||
|
|
|
||
|
|
$ch = curl_init($curlurl->out(false));
|
||
|
|
curl_setopt($ch, CURLOPT_FILE, $fp);
|
||
|
|
curl_exec($ch);
|
||
|
|
curl_close($ch);
|
||
|
|
fclose($fp);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Uploads a course backup
|
||
|
|
*
|
||
|
|
* @param int $hubcourseid id of the published course on moodle.net, it must be published from this site
|
||
|
|
* @param \stored_file $backupfile
|
||
|
|
*/
|
||
|
|
public static function upload_course_backup($hubcourseid, \stored_file $backupfile) {
|
||
|
|
$curl = new \curl();
|
||
|
|
$params = array();
|
||
|
|
$params['filetype'] = self::HUB_BACKUP_FILE_TYPE;
|
||
|
|
$params['courseid'] = $hubcourseid;
|
||
|
|
$params['file'] = $backupfile;
|
||
|
|
$params['token'] = registration::get_token();
|
||
|
|
$curl->post(HUB_MOODLEORGHUBURL . '/local/hub/webservice/upload.php', $params);
|
||
|
|
}
|
||
|
|
}
|