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Differences Between: [Versions 310 and 403] [Versions 311 and 403] [Versions 39 and 403] [Versions 400 and 403] [Versions 401 and 403]

   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   * Airnotifier message processor to send messages to the APNS provider: airnotfier. (https://github.com/dcai/airnotifier)
  19   *
  20   * @package    message_airnotifier
  21   * @category   external
  22   * @copyright  2012 Jerome Mouneyrac <jerome@moodle.com>
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   * @since Moodle 2.7
  25   */
  26  
  27  
  28  require_once($CFG->dirroot . '/message/output/lib.php');
  29  
  30  /**
  31   * Message processor class
  32   *
  33   * @package   message_airnotifier
  34   * @copyright 2012 Jerome Mouneyrac
  35   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class message_output_airnotifier extends message_output {
  38  
  39      /**
  40       * Processes the message and sends a notification via airnotifier
  41       *
  42       * @param stdClass $eventdata the event data submitted by the message sender plus $eventdata->savedmessageid
  43       * @return true if ok, false if error
  44       */
  45      public function send_message($eventdata) {
  46          global $CFG, $DB;
  47          require_once($CFG->libdir . '/filelib.php');
  48  
  49          if (!empty($CFG->noemailever)) {
  50              // Hidden setting for development sites, set in config.php if needed.
  51              debugging('$CFG->noemailever active, no airnotifier message sent.', DEBUG_MINIMAL);
  52              return true;
  53          }
  54  
  55          // Skip any messaging suspended and deleted users.
  56          if ($eventdata->userto->auth === 'nologin' or
  57              $eventdata->userto->suspended or
  58              $eventdata->userto->deleted) {
  59              return true;
  60          }
  61  
  62          // If username is empty we try to retrieve it, since it's required to generate the siteid.
  63          if (empty($eventdata->userto->username)) {
  64              $eventdata->userto->username = $DB->get_field('user', 'username', array('id' => $eventdata->userto->id));
  65          }
  66  
  67          // Site id, to map with Moodle Mobile stored sites.
  68          $siteid = md5($CFG->wwwroot . $eventdata->userto->username);
  69  
  70          // Airnotifier can handle custom requests using processors (that are Airnotifier plugins).
  71          // In the extra parameter we indicate which processor to use and also additional data to be handled by the processor.
  72          // Here we clone the eventdata object because will be deleting/adding attributes.
  73          $extra = clone $eventdata;
  74  
  75          // Delete attributes that may content private information.
  76          if (!empty($eventdata->userfrom)) {
  77              $extra->userfromid = $eventdata->userfrom->id;
  78              $extra->userfromfullname = fullname($eventdata->userfrom);
  79              unset($extra->userfrom);
  80          }
  81          $extra->usertoid = $eventdata->userto->id;
  82          unset($extra->userto);
  83  
  84          $extra->processor       = 'moodle';
  85          $extra->site            = $siteid;
  86          $extra->date            = (!empty($eventdata->timecreated)) ? $eventdata->timecreated : time();
  87          $extra->notification    = (!empty($eventdata->notification)) ? 1 : 0;
  88          $encryptnotifications = get_config('message_airnotifier', 'encryptnotifications') == 1;
  89          $encryptprocessing = get_config('message_airnotifier', 'encryptprocessing');
  90  
  91          // Site name.
  92          $site = get_site();
  93          $extra->sitefullname = clean_param(format_string($site->fullname), PARAM_NOTAGS);
  94          $extra->siteshortname = clean_param(format_string($site->shortname), PARAM_NOTAGS);
  95  
  96          // Clean HTML and ony allow data not to be ignored by Airnotifier to reduce the payload size.
  97          if (empty($extra->smallmessage)) {
  98              $extra->smallmessage = $extra->fullmessage;
  99          }
 100          $extra->smallmessage = clean_param($extra->smallmessage, PARAM_NOTAGS);
 101          unset($extra->fullmessage);
 102          unset($extra->fullmessagehtml);
 103          unset($extra->fullmessageformat);
 104          unset($extra->fullmessagetrust);
 105  
 106          // Send wwwroot to airnotifier.
 107          $extra->wwwroot = $CFG->wwwroot;
 108  
 109          // We are sending to message to all devices.
 110          $airnotifiermanager = new message_airnotifier_manager();
 111          $devicetokens = $airnotifiermanager->get_user_devices($CFG->airnotifiermobileappname, $eventdata->userto->id);
 112  
 113          foreach ($devicetokens as $devicetoken) {
 114              if (!$devicetoken->enable) {
 115                  continue;
 116              }
 117  
 118              // Check if we should skip sending the notification.
 119              if ($encryptnotifications && empty($devicetoken->publickey) &&
 120                      $encryptprocessing == message_airnotifier_manager::ENCRYPT_UNSUPPORTED_NOT_SEND) {
 121  
 122                  continue;   // Avoid sending notifications to devices not supporting encryption.
 123              }
 124  
 125              // Sending the message to the device.
 126              $serverurl = $CFG->airnotifierurl . ':' . $CFG->airnotifierport . '/api/v2/push/';
 127              $header = array('Accept: application/json', 'X-AN-APP-NAME: ' . $CFG->airnotifierappname,
 128                  'X-AN-APP-KEY: ' . $CFG->airnotifieraccesskey);
 129              $curl = new curl;
 130              // Push notifications are supposed to be instant, do not wait to long blocking the execution.
 131              $curl->setopt(array('CURLOPT_TIMEOUT' => 2, 'CURLOPT_CONNECTTIMEOUT' => 2));
 132              $curl->setHeader($header);
 133  
 134              // Clone the data to avoid modifying the original.
 135              $deviceextra = clone $extra;
 136  
 137              $deviceextra->encrypted = $encryptnotifications;
 138              $deviceextra = $this->encrypt_payload($deviceextra, $devicetoken);
 139  
 140              // We use Firebase to deliver all Push Notifications, and for all device types.
 141              // Firebase has a 4KB payload limit.
 142              // https://firebase.google.com/docs/cloud-messaging/concept-options#notifications_and_data_messages
 143              // If the message is over that limit we remove unneeded fields and replace the title with a simple message.
 144              if (\core_text::strlen(json_encode($deviceextra), '8bit') > 4000) {
 145                  $deviceextra->smallmessage = get_string('view_notification', 'message_airnotifier');
 146              }
 147  
 148              $params = array(
 149                  'device'    => $devicetoken->platform,
 150                  'token'     => $devicetoken->pushid,
 151                  'extra'     => $deviceextra
 152              );
 153              if ($deviceextra->encrypted) {
 154                  // Setting alert to null makes air notifier send the notification as a data payload,
 155                  // this forces Android phones to call the app onMessageReceived function to decrypt the notification.
 156                  // Otherwise notifications are created by the Android system and will not be decrypted.
 157                  $params['alert'] = null;
 158              }
 159  
 160              // JSON POST raw body request.
 161              $resp = $curl->post($serverurl, json_encode($params));
 162          }
 163  
 164          return true;
 165      }
 166  
 167      /**
 168       * Encrypt the notification payload.
 169       *
 170       * @param stdClass $payload The notification payload.
 171       * @param stdClass $devicetoken The device token record
 172       * @return stdClass
 173       */
 174      protected function encrypt_payload(stdClass $payload, stdClass $devicetoken): stdClass {
 175          if (empty($payload->encrypted)) {
 176              return $payload;
 177          }
 178  
 179          if (empty($devicetoken->publickey)) {
 180              $payload->encrypted = false;
 181              return $payload;
 182          }
 183  
 184          $publickey = sodium_base642bin($devicetoken->publickey, SODIUM_BASE64_VARIANT_ORIGINAL);
 185          $fields = [
 186              'userfromfullname',
 187              'userfromid',
 188              'sitefullname',
 189              'smallmessage',
 190              'subject',
 191              'contexturl',
 192          ];
 193          foreach ($fields as $field) {
 194              if (!isset($payload->$field)) {
 195                  continue;
 196              }
 197              $payload->$field = sodium_bin2base64(sodium_crypto_box_seal(
 198                  $payload->$field,
 199                  $publickey
 200              ), SODIUM_BASE64_VARIANT_ORIGINAL);
 201          }
 202  
 203          // Remove extra fields which may contain personal data.
 204          // They cannot be encrypted otherwise we would go over the 4KB payload size limit.
 205          unset($payload->usertoid);
 206          unset($payload->replyto);
 207          unset($payload->replytoname);
 208          unset($payload->siteshortname);
 209          unset($payload->customdata);
 210          unset($payload->contexturlname);
 211          unset($payload->replytoname);
 212          unset($payload->attachment);
 213          unset($payload->attachname);
 214  
 215          return $payload;
 216      }
 217  
 218      /**
 219       * Creates necessary fields in the messaging config form.
 220       *
 221       * @param array $preferences An array of user preferences
 222       */
 223      public function config_form($preferences) {
 224          global $CFG, $OUTPUT, $USER, $PAGE;
 225  
 226          $systemcontext = context_system::instance();
 227          if (!has_capability('message/airnotifier:managedevice', $systemcontext)) {
 228              return get_string('nopermissiontomanagedevices', 'message_airnotifier');
 229          }
 230  
 231          if (!$this->is_system_configured()) {
 232              return get_string('notconfigured', 'message_airnotifier');
 233          } else {
 234  
 235              $airnotifiermanager = new message_airnotifier_manager();
 236              $devicetokens = $airnotifiermanager->get_user_devices($CFG->airnotifiermobileappname, $USER->id);
 237  
 238              if (!empty($devicetokens)) {
 239                  $output = '';
 240  
 241                  foreach ($devicetokens as $devicetoken) {
 242  
 243                      if ($devicetoken->enable) {
 244                          $hideshowiconname = 't/hide';
 245                          $dimmed = '';
 246                      } else {
 247                          $hideshowiconname = 't/show';
 248                          $dimmed = 'dimmed_text';
 249                      }
 250  
 251                      $hideshowicon = $OUTPUT->pix_icon($hideshowiconname, get_string('showhide', 'message_airnotifier'));
 252                      $name = "{$devicetoken->name} {$devicetoken->model} {$devicetoken->platform} {$devicetoken->version}";
 253  
 254                      $output .= html_writer::start_tag('li', array('id' => $devicetoken->id,
 255                                                                      'class' => 'airnotifierdevice ' . $dimmed)) . "\n";
 256                      $output .= html_writer::label($name, 'deviceid-' . $devicetoken->id, array('class' => 'devicelabel ')) . ' ' .
 257                          html_writer::link('#', $hideshowicon, array('class' => 'hidedevice', 'alt' => 'show/hide')) . "\n";
 258                      $output .= html_writer::end_tag('li') . "\n";
 259                  }
 260  
 261                  // Include the AJAX script to automatically trigger the action.
 262                  $airnotifiermanager->include_device_ajax();
 263  
 264                  $output = html_writer::tag('ul', $output, array('class' => 'list-unstyled unstyled',
 265                      'id' => 'airnotifierdevices'));
 266              } else {
 267                  $output = get_string('nodevices', 'message_airnotifier');
 268              }
 269              return $output;
 270          }
 271      }
 272  
 273      /**
 274       * Parses the submitted form data and saves it into preferences array.
 275       *
 276       * @param stdClass $form preferences form class
 277       * @param array $preferences preferences array
 278       */
 279      public function process_form($form, &$preferences) {
 280          return true;
 281      }
 282  
 283      /**
 284       * Loads the config data from database to put on the form during initial form display
 285       *
 286       * @param array $preferences preferences array
 287       * @param int $userid the user id
 288       */
 289      public function load_data(&$preferences, $userid) {
 290          return true;
 291      }
 292  
 293      /**
 294       * Tests whether the airnotifier settings have been configured
 295       * @return boolean true if airnotifier is configured
 296       */
 297      public function is_system_configured() {
 298          $airnotifiermanager = new message_airnotifier_manager();
 299          return $airnotifiermanager->is_system_configured();
 300      }
 301  }