webservice/externallib.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   4 // Moodle is free software: you can redistribute it and/or modify
   5 // it under the terms of the GNU General Public License as published by
   6 // the Free Software Foundation, either version 3 of the License, or
   7 // (at your option) any later version.
   8 //
   9 // Moodle is distributed in the hope that it will be useful,
  10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 // GNU General Public License for more details.
  13 //
  14 // You should have received a copy of the GNU General Public License
  15 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16
  17
  18 /**
  19  * external API for mobile web services
  20  *
  21  * @package    core_webservice
  22  * @category   external
  23  * @copyright  2011 Jerome Mouneyrac <jerome@moodle.com>
  24  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25  */
  26
  27 defined('MOODLE_INTERNAL') || die;
  28
  29 require_once("$CFG->libdir/externallib.php");
  30
  31 /**
  32  * Web service related functions
  33  *
  34  * @package    core_webservice
  35  * @category   external
  36  * @copyright  2011 Jerome Mouneyrac <jerome@moodle.com>
  37  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  38  * @since Moodle 2.2
  39  */
  40 class core_webservice_external extends external_api {
  41
  42     /**
  43      * Returns description of method parameters
  44      *
  45      * @return external_function_parameters
  46      * @since Moodle 2.2
  47      */
  48     public static function get_site_info_parameters() {
  49         return new external_function_parameters(
  50             array('serviceshortnames' => new external_multiple_structure (
  51                 new external_value(
  52                     PARAM_ALPHANUMEXT,
  53                     'service shortname'),
  54                     'DEPRECATED PARAMETER - it was a design error in the original implementation. \
  55                     It is ignored now. (parameter kept for backward compatibility)',
  56                     VALUE_DEFAULT,
  57                     array()
  58                 ),
  59             )
  60         );
  61     }
  62
  63     /**
  64      * Return user information including profile picture + basic site information
  65      * Note:
  66      * - no capability checking because we return only known information about logged user
  67      *
  68      * @param array $serviceshortnames - DEPRECATED PARAMETER - values will be ignored -
  69      * it was an original design error, we keep for backward compatibility.
  70      * @return array site info
  71      * @since Moodle 2.2
  72      */
  73     public static function get_site_info($serviceshortnames = array()) {
  74         global $USER, $SITE, $CFG, $DB, $PAGE;
  75
  76         $params = self::validate_parameters(self::get_site_info_parameters(),
  77                       array('serviceshortnames'=>$serviceshortnames));
  78
  79         $context = context_user::instance($USER->id);
  80
  81         $userpicture = new user_picture($USER);
  82         $userpicture->size = 1; // Size f1.
  83         $profileimageurl = $userpicture->get_url($PAGE);
  84
  85         // Site information.
  86         $siteinfo =  array(
  87             'sitename' => $SITE->fullname,
  88             'siteurl' => $CFG->wwwroot,
  89             'username' => $USER->username,
  90             'firstname' => $USER->firstname,
  91             'lastname' => $USER->lastname,
  92             'fullname' => fullname($USER),
  93             'lang' => clean_param(current_language(), PARAM_LANG),
  94             'userid' => $USER->id,
  95             'userpictureurl' => $profileimageurl->out(false),
  96             'siteid' => SITEID
  97         );
  98
  99         // Retrieve the service and functions from the web service linked to the token
 100         // If you call this function directly from external (not a web service call),
 101         // then it will still return site info without information about a service
 102         // Note: wsusername/wspassword ws authentication is not supported.
 103         $functions = array();
 104         if ($CFG->enablewebservices) { // No need to check token if web service are disabled and not a ws call.
 105             $token = optional_param('wstoken', '', PARAM_ALPHANUM);
 106
 107             if (!empty($token)) { // No need to run if not a ws call.
 108                 // Retrieve service shortname.
 109                 $servicesql = 'SELECT s.*
 110                                FROM {external_services} s, {external_tokens} t
 111                                WHERE t.externalserviceid = s.id AND token = ? AND t.userid = ? AND s.enabled = 1';
 112                 $service = $DB->get_record_sql($servicesql, array($token, $USER->id));
 113
 114                 $siteinfo['downloadfiles'] = $service->downloadfiles;
 115                 $siteinfo['uploadfiles'] = $service->uploadfiles;
 116
 117                 if (!empty($service)) {
 118                     // Return the release and version number for web service users only.
 119                     $siteinfo['release'] = $CFG->release;
 120                     $siteinfo['version'] = $CFG->version;
 121                     // Retrieve the functions.
 122                     $functionssql = "SELECT f.*
 123                             FROM {external_functions} f, {external_services_functions} sf
 124                             WHERE f.name = sf.functionname AND sf.externalserviceid = ?";
 125                     $functions = $DB->get_records_sql($functionssql, array($service->id));
 126                 } else {
 127                     throw new coding_exception('No service found in get_site_info: something is buggy, \
 128                                                 it should have fail at the ws server authentication layer.');
 129                 }
 130             }
 131         }
 132
 133         // Build up the returned values of the list of functions.
 134         $componentversions = array();
 135         $availablefunctions = array();
 136         foreach ($functions as $function) {
 137             $functioninfo = array();
 138             $functioninfo['name'] = $function->name;
 139             if ($function->component == 'moodle' || $function->component == 'core') {
 140                 $version = $CFG->version; // Moodle version.
 141             } else {
 142                 $versionpath = core_component::get_component_directory($function->component).'/version.php';
 143                 if (is_readable($versionpath)) {
 144                     // We store the component version once retrieved (so we don't load twice the version.php).
 145                     if (!isset($componentversions[$function->component])) {
 146                         $plugin = new stdClass();
 147                         include($versionpath);
 148                         $componentversions[$function->component] = $plugin->version;
 149                         $version = $plugin->version;
 150                     } else {
 151                         $version = $componentversions[$function->component];
 152                     }
 153                 } else {
 154                     // Function component should always have a version.php,
 155                     // otherwise the function should have been described with component => 'moodle'.
 156                     throw new moodle_exception('missingversionfile', 'webservice', '', $function->component);
 157                 }
 158             }
 159             $functioninfo['version'] = $version;
 160             $availablefunctions[] = $functioninfo;
 161         }
 162
 163         $siteinfo['functions'] = $availablefunctions;
 164
 165         // Mobile CSS theme and alternative login url.
 166         $siteinfo['mobilecssurl'] = !empty($CFG->mobilecssurl) ? $CFG->mobilecssurl : '';
 167
 168         // Retrieve some advanced features. Only enable/disable ones (bool).
 169         $advancedfeatures = array("usecomments", "usetags", "enablenotes", "messaging", "enableblogs",
 170                                     "enablecompletion", "enablebadges", "messagingallusers");
 171         foreach ($advancedfeatures as $feature) {
 172             if (isset($CFG->{$feature})) {
 173                 $siteinfo['advancedfeatures'][] = array(
 174                     'name' => $feature,
 175                     'value' => (int) $CFG->{$feature}
 176                 );
 177             }
 178         }
 179         // Special case mnet_dispatcher_mode.
 180         $siteinfo['advancedfeatures'][] = array(
 181             'name' => 'mnet_dispatcher_mode',
 182             'value' => ($CFG->mnet_dispatcher_mode == 'strict') ? 1 : 0
 183         );
 184
 185         // User can manage own files.
 186         $siteinfo['usercanmanageownfiles'] = has_capability('moodle/user:manageownfiles', $context);
 187
 188         // User quota. 0 means user can ignore the quota.
 189         $siteinfo['userquota'] = 0;
 190         if (!has_capability('moodle/user:ignoreuserquota', $context)) {
 191             $siteinfo['userquota'] = (int) $CFG->userquota; // Cast to int to ensure value is not higher than PHP_INT_MAX.
 192         }
 193
 194         // User max upload file size. -1 means the user can ignore the upload file size.
 195         // Cast to int to ensure value is not higher than PHP_INT_MAX.
 196         $siteinfo['usermaxuploadfilesize'] = (int) get_user_max_upload_file_size($context, $CFG->maxbytes);
 197
 198         // User home page.
 199         $siteinfo['userhomepage'] = get_home_page();
 200
 201         // Calendar.
 202         $siteinfo['sitecalendartype'] = $CFG->calendartype;
 203         if (empty($USER->calendartype)) {
 204             $siteinfo['usercalendartype'] = $CFG->calendartype;
 205         } else {
 206             $siteinfo['usercalendartype'] = $USER->calendartype;
 207         }
 208
 209         return $siteinfo;
 210     }
 211
 212     /**
 213      * Returns description of method result value
 214      *
 215      * @return external_single_structure
 216      * @since Moodle 2.2
 217      */
 218     public static function get_site_info_returns() {
 219         return new external_single_structure(
 220             array(
 221                 'sitename'       => new external_value(PARAM_RAW, 'site name'),
 222                 'username'       => new external_value(PARAM_RAW, 'username'),
 223                 'firstname'      => new external_value(PARAM_TEXT, 'first name'),
 224                 'lastname'       => new external_value(PARAM_TEXT, 'last name'),
 225                 'fullname'       => new external_value(PARAM_TEXT, 'user full name'),
 226                 'lang'           => new external_value(PARAM_LANG, 'Current language.'),
 227                 'userid'         => new external_value(PARAM_INT, 'user id'),
 228                 'siteurl'        => new external_value(PARAM_RAW, 'site url'),
 229                 'userpictureurl' => new external_value(PARAM_URL, 'the user profile picture.
 230                     Warning: this url is the public URL that only works when forcelogin is set to NO and guestaccess is set to YES.
 231                     In order to retrieve user profile pictures independently of the Moodle config, replace "pluginfile.php" by
 232                     "webservice/pluginfile.php?token=WSTOKEN&file="
 233                     Of course the user can only see profile picture depending
 234                     on his/her permissions. Moreover it is recommended to use HTTPS too.'),
 235                 'functions'      => new external_multiple_structure(
 236                     new external_single_structure(
 237                         array(
 238                             'name' => new external_value(PARAM_RAW, 'function name'),
 239                             'version' => new external_value(PARAM_TEXT,
 240                                         'The version number of the component to which the function belongs')
 241                         ), 'functions that are available')
 242                     ),
 243                 'downloadfiles'  => new external_value(PARAM_INT, '1 if users are allowed to download files, 0 if not',
 244                                                        VALUE_OPTIONAL),
 245                 'uploadfiles'  => new external_value(PARAM_INT, '1 if users are allowed to upload files, 0 if not',
 246                                                        VALUE_OPTIONAL),
 247                 'release'  => new external_value(PARAM_TEXT, 'Moodle release number', VALUE_OPTIONAL),
 248                 'version'  => new external_value(PARAM_TEXT, 'Moodle version number', VALUE_OPTIONAL),
 249                 'mobilecssurl'  => new external_value(PARAM_URL, 'Mobile custom CSS theme', VALUE_OPTIONAL),
 250                 'advancedfeatures' => new external_multiple_structure(
 251                     new external_single_structure(
 252                         array(
 253                             'name'  => new external_value(PARAM_ALPHANUMEXT, 'feature name'),
 254                             'value' => new external_value(PARAM_INT, 'feature value. Usually 1 means enabled.')
 255                         ),
 256                         'Advanced features availability'
 257                     ),
 258                     'Advanced features availability',
 259                     VALUE_OPTIONAL
 260                 ),
 261                 'usercanmanageownfiles' => new external_value(PARAM_BOOL,
 262                                             'true if the user can manage his own files', VALUE_OPTIONAL),
 263                 'userquota' => new external_value(PARAM_INT,
 264                                     'user quota (bytes). 0 means user can ignore the quota', VALUE_OPTIONAL),
 265                 'usermaxuploadfilesize' => new external_value(PARAM_INT,
 266                                             'user max upload file size (bytes). -1 means the user can ignore the upload file size',
 267                                             VALUE_OPTIONAL),
 268                 'userhomepage' => new external_value(PARAM_INT,
 269                                                         'the default home page for the user: 0 for the site home, 1 for dashboard',
 270                                                         VALUE_OPTIONAL),
 271                 'siteid'  => new external_value(PARAM_INT, 'Site course ID', VALUE_OPTIONAL),
 272                 'sitecalendartype'  => new external_value(PARAM_PLUGIN, 'Calendar type set in the site.', VALUE_OPTIONAL),
 273                 'usercalendartype'  => new external_value(PARAM_PLUGIN, 'Calendar typed used by the user.', VALUE_OPTIONAL),
 274             )
 275         );
 276     }
 277 }