actions/sup.php

   1 <?php
   2 /*
   3  * Laconica - a distributed open-source microblogging tool
   4  * Copyright (C) 2008, Controlez-Vous, Inc.
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU Affero General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU Affero General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Affero General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 if (!defined('LACONICA')) { exit(1); }
  21
  22 class SupAction extends Action {
  23
  24         function handle($args) {
  25
  26                 parent::handle($args);
  27
  28                 $seconds = $this->trimmed('seconds');
  29
  30                 if (!$seconds) {
  31                         $seconds = 15;
  32                 }
  33
  34                 $updates = $this->get_updates($seconds);
  35
  36                 header('Content-Type: application/json; charset=utf-8');
  37
  38                 print json_encode(array('updated_time' => date('c'),
  39                                                                 'since_time' => date('c', time() - $seconds),
  40                                                                 'available_periods' => $this->available_periods(),
  41                                                                 'period' => $seconds,
  42                                                                 'updates' => $updates));
  43         }
  44
  45         function available_periods() {
  46                 static $periods = array(86400, 43200, 21600, 7200,
  47                                                                 3600, 1800,     600, 300, 120,
  48                                                                 60, 30, 15);
  49                 $available = array();
  50                 foreach ($periods as $period) {
  51                         $available[$period] = common_local_url('sup',
  52                                                                                                    array('seconds' => $period));
  53                 }
  54
  55                 return $available;
  56         }
  57
  58         function get_updates($seconds) {
  59                 $notice = new Notice();
  60
  61                 # XXX: cache this. Depends on how big this protocol becomes;
  62                 # Re-doing this query every 15 seconds isn't the end of the world.
  63
  64                 $notice->query('SELECT profile_id, max(id) AS max_id ' .
  65                                            'FROM notice ' .
  66                                            'WHERE created > (now() - ' . $seconds . ') ' .
  67                                            'GROUP BY profile_id');
  68
  69                 $updates = array();
  70
  71                 while ($notice->fetch()) {
  72                         $updates[] = array($notice->profile_id, $notice->max_id);
  73                 }
  74
  75                 return $updates;
  76         }
  77
  78         function is_readonly() {
  79                 return true;
  80         }
  81 }