lib/twitterapi.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 TwitterapiAction extends Action {
  23
  24         function handle($args) {
  25                 parent::handle($args);
  26         }
  27
  28         function twitter_user_array($profile, $get_notice=false) {
  29
  30                 $twitter_user = array();
  31
  32                 $twitter_user['name'] = $profile->getBestName();
  33                 $twitter_user['followers_count'] = $this->count_subscriptions($profile);
  34                 $twitter_user['screen_name'] = $profile->nickname;
  35                 $twitter_user['description'] = ($profile->bio) ? $profile->bio : NULL;
  36                 $twitter_user['location'] = ($profile->location) ? $profile->location : NULL;
  37                 $twitter_user['id'] = intval($profile->id);
  38
  39                 $avatar = $profile->getAvatar(AVATAR_STREAM_SIZE);
  40
  41                 $twitter_user['profile_image_url'] = ($avatar) ? common_avatar_display_url($avatar) : common_default_avatar(AVATAR_STREAM_SIZE);
  42                 $twitter_user['protected'] = 'false'; # not supported by Laconica yet
  43                 $twitter_user['url'] = ($profile->homepage) ? $profile->homepage : NULL;
  44
  45                 if ($get_notice) {
  46                         $notice = $profile->getCurrentNotice();
  47                         if ($notice) {
  48                                 # don't get user!
  49                                 $twitter_user['status'] = $this->twitter_status_array($notice, false);
  50                         }
  51                 }
  52
  53                 return $twitter_user;
  54         }
  55
  56         function twitter_status_array($notice, $get_user=true) {
  57
  58                 $twitter_status = array();
  59
  60                 $twitter_status['text'] = $notice->content;
  61                 $twitter_status['truncated'] = 'false'; # Not possible on Laconica
  62                 $twitter_status['created_at'] = $this->date_twitter($notice->created);
  63                 $twitter_status['in_reply_to_status_id'] = ($notice->reply_to) ? intval($notice->reply_to) : NULL;
  64                 $twitter_status['source'] = $notice->source;
  65                 $twitter_status['id'] = intval($notice->id);
  66                 $twitter_status['in_reply_to_user_id'] = ($notice->reply_to) ? $this->replier_by_reply(intval($notice->reply_to)) : NULL;
  67                 $twitter_status['favorited'] = NULL; # XXX: Not implemented on Laconica yet.
  68
  69                 if ($get_user) {
  70                         $profile = $notice->getProfile();
  71                         # Don't get notice (recursive!)
  72                         $twitter_user = $this->twitter_user_array($profile, false);
  73                         $twitter_status['user'] = $twitter_user;
  74                 }
  75
  76                 return $twitter_status;
  77         }
  78
  79         function twitter_rss_entry_array($notice) {
  80
  81                 $profile = $notice->getProfile();
  82
  83                 $server = common_config('site', 'server');
  84                 $entry = array();
  85
  86                 $entry['content'] = $profile->nickname . ': ' . $notice->content;
  87                 $entry['title'] = $entry['content'];
  88                 $entry['link'] = common_local_url('shownotice', array('notice' => $notice->id));;
  89                 $entry['published'] = common_date_iso8601($notice->created);
  90                 $entry['id'] = "tag:$server,$entry[published]:$entry[link]";
  91                 $entry['updated'] = $entry['published'];
  92
  93                 # RSS Item specific
  94                 $entry['description'] = $entry['content'];
  95                 $entry['pubDate'] = common_date_rfc2822($notice->created);
  96                 $entry['guid'] = $entry['link'];
  97
  98                 return $entry;
  99         }
 100
 101         function show_twitter_xml_status($twitter_status) {
 102                 common_element_start('status');
 103                 foreach($twitter_status as $element => $value) {
 104                         if ($element == 'user') {
 105                                 $this->show_twitter_xml_user($twitter_status['user']);
 106                         } else {
 107                                 common_element($element, NULL, $value);
 108                         }
 109                 }
 110                 common_element_end('status');
 111         }
 112
 113         function show_twitter_xml_user($twitter_user) {
 114                 common_element_start('user');
 115                 foreach($twitter_user as $element => $value) {
 116                         if ($element == 'status') {
 117                                 $this->show_twitter_xml_status($twitter_user['status']);
 118                         } else {
 119                                 common_element($element, NULL, $value);
 120                         }
 121                 }
 122                 common_element_end('user');
 123         }
 124
 125         function show_twitter_rss_item($entry) {
 126                 common_element_start('item');
 127                 common_element('title', NULL, $entry['title']);
 128                 common_element('description', NULL, $entry['description']);
 129                 common_element('pubDate', NULL, $entry['pubDate']);
 130                 common_element('guid', NULL, $entry['guid']);
 131                 common_element('link', NULL, $entry['link']);
 132                 common_element_end('item');
 133         }
 134
 135         function show_twitter_atom_entry($entry) {
 136             common_element_start('entry');
 137                 common_element('title', NULL, $entry['title']);
 138                 common_element('content', array('type' => 'html'), $entry['title']);
 139                 common_element('id', NULL, $entry['id']);
 140                 common_element('published', NULL, $entry['published']);
 141                 common_element('updated', NULL, $entry['updated']);
 142                 common_element('link', array('href' => $entry['link'], 'rel' => 'alternate', 'type' => 'text/html'), NULL);
 143                 common_element_end('entry');
 144         }
 145
 146         function show_twitter_json_statuses($twitter_statuses) {
 147                 print(json_encode($twitter_statuses));
 148         }
 149
 150         function show_twitter_json_users($twitter_users) {
 151                 print(json_encode($twitter_users));
 152         }
 153
 154         function show_single_xml_status($notice) {
 155                 $this->init_document('xml');
 156                 $twitter_status = $this->twitter_status_array($notice);
 157                 $this->show_twitter_xml_status($twitter_status);
 158                 $this->end_document('xml');
 159                 exit();
 160         }
 161
 162         function show_single_json_status($notice) {
 163                 $this->init_document('json');
 164                 $status = $this->twitter_status_array($notice);
 165                 $this->show_twitter_json_statuses($status);
 166                 $this->end_document('json');
 167                 exit();
 168         }
 169
 170         // Anyone know what date format this is?
 171         // Twitter's dates look like this: "Mon Jul 14 23:52:38 +0000 2008" -- Zach
 172         function date_twitter($dt) {
 173                 $t = strtotime($dt);
 174                 return date("D M d G:i:s O Y", $t);
 175         }
 176
 177         function replier_by_reply($reply_id) {
 178                 $notice = Notice::staticGet($reply_id);
 179                 if ($notice) {
 180                         $profile = $notice->getProfile();
 181                         if ($profile) {
 182                                 return intval($profile->id);
 183                         } else {
 184                                 common_debug('Can\'t find a profile for notice: ' . $notice->id, __FILE__);
 185                         }
 186                 } else {
 187                         common_debug("Can't get notice: $reply_id", __FILE__);
 188                 }
 189                 return NULL;
 190         }
 191
 192         // XXX: Candidate for a general utility method somewhere?
 193         function count_subscriptions($profile) {
 194
 195                 $count = 0;
 196                 $sub = new Subscription();
 197                 $sub->subscribed = $profile->id;
 198
 199                 $count = $sub->find();
 200
 201                 if ($count > 0) {
 202                         return $count - 1;
 203                 } else {
 204                         return 0;
 205                 }
 206         }
 207
 208         function init_document($type='xml') {
 209                 switch ($type) {
 210                  case 'xml':
 211                         header('Content-Type: application/xml; charset=utf-8');
 212                         common_start_xml();
 213                         break;
 214                  case 'json':
 215                         header('Content-Type: application/json; charset=utf-8');
 216
 217                         // Check for JSON-P callback
 218                         $callback = $this->arg('callback');
 219                         if ($callback) {
 220                                 print $callback . '(';
 221                         }
 222                         break;
 223                  case 'rss':
 224                         header("Content-Type: application/rss+xml; charset=utf-8");
 225                         $this->init_twitter_rss();
 226                         break;
 227                  case 'atom':
 228                         header('Content-Type: application/atom+xml; charset=utf-8');
 229                         $this->init_twitter_atom();
 230                         break;
 231                  default:
 232                         $this->client_error(_('Not a supported data format.'));
 233                         break;
 234                 }
 235
 236                 return;
 237         }
 238
 239         function end_document($type='xml') {
 240                 switch ($type) {
 241                  case 'xml':
 242                         common_end_xml();
 243                         break;
 244                  case 'json':
 245
 246                         // Check for JSON-P callback
 247                         $callback = $this->arg('callback');
 248                         if ($callback) {
 249                                 print ')';
 250                         }
 251                         break;
 252                  case 'rss':
 253                         $this->end_twitter_rss();
 254                         break;
 255                  case 'atom':
 256                         $this->end_twitter_rss();
 257                         break;
 258                  default:
 259                         $this->client_error(_('Not a supported data format.'));
 260                         break;
 261                 }
 262                 return;
 263         }
 264
 265         function client_error($msg, $code = 400, $content_type = 'json') {
 266
 267                 static $status = array(400 => 'Bad Request',
 268                                                            401 => 'Unauthorized',
 269                                                            402 => 'Payment Required',
 270                                                            403 => 'Forbidden',
 271                                                            404 => 'Not Found',
 272                                                            405 => 'Method Not Allowed',
 273                                                            406 => 'Not Acceptable',
 274                                                            407 => 'Proxy Authentication Required',
 275                                                            408 => 'Request Timeout',
 276                                                            409 => 'Conflict',
 277                                                            410 => 'Gone',
 278                                                            411 => 'Length Required',
 279                                                            412 => 'Precondition Failed',
 280                                                            413 => 'Request Entity Too Large',
 281                                                            414 => 'Request-URI Too Long',
 282                                                            415 => 'Unsupported Media Type',
 283                                                            416 => 'Requested Range Not Satisfiable',
 284                                                            417 => 'Expectation Failed');
 285
 286                 $action = $this->trimmed('action');
 287
 288                 common_debug("User error '$code' on '$action': $msg", __FILE__);
 289
 290                 if (!array_key_exists($code, $status)) {
 291                         $code = 400;
 292                 }
 293
 294                 $status_string = $status[$code];
 295                 header('HTTP/1.1 '.$code.' '.$status_string);
 296
 297                 if ($content_type == 'xml') {
 298                         $this->init_document('xml');
 299                         common_element_start('hash');
 300                         common_element('error', NULL, $msg);
 301                         common_element('request', NULL, $_SERVER['REQUEST_URI']);
 302                         common_element_end('hash');
 303                         $this->end_document('xml');
 304                 } else {
 305                         $this->init_document('json');
 306                         $error_array = array('error' => $msg, 'request' => $_SERVER['REQUEST_URI']);
 307                         print(json_encode($error_array));
 308                         $this->end_document('json');
 309                 }
 310
 311                 exit();
 312         }
 313
 314         function init_twitter_rss() {
 315                 common_start_xml();
 316                 common_element_start('rss', array('version' => '2.0'));
 317         }
 318
 319         function end_twitter_rss() {
 320                 common_element_end('rss');
 321                 common_end_xml();
 322         }
 323
 324         function init_twitter_atom() {
 325                 common_start_xml();
 326                 common_element_start('feed', array('xmlns' => 'http://www.w3.org/2005/Atom', 'xml:lang' => 'en-US'));
 327         }
 328
 329         function end_twitter_atom() {
 330                 common_end_xml();
 331                 common_element_end('feed');
 332         }
 333
 334         function show_profile($profile, $content_type='xml', $notice=NULL) {
 335                 $profile_array = $this->twitter_user_array($profile, true);
 336                 switch ($content_type) {
 337                  case 'xml':
 338                         $this->show_twitter_xml_user($profile_array);
 339                         break;
 340                  case 'json':
 341                         $this->show_twitter_json_users($profile_array);
 342                         break;
 343                  default:
 344                         $this->client_error(_('Not a supported data format.'));
 345                         return;
 346                 }
 347                 return;
 348         }
 349 }