fbpost/fbpost.php

   1 <?php
   2 /**
   3  * Name: Facebook Post Connector
   4  * Version: 1.3
   5  * Author: Mike Macgirvin <http://macgirvin.com/profile/mike>
   6  * Author: Tobias Hößl <https://github.com/CatoTH/>
   7  *
   8  */
   9
  10 /**
  11  * Installing the Friendica/Facebook connector
  12  *
  13  * Detailed instructions how to use this plugin can be found at
  14  * https://github.com/friendica/friendica/wiki/How-to:-Friendica%E2%80%99s-Facebook-connector
  15  *
  16  * Vidoes and embeds will not be posted if there is no other content. Links
  17  * and images will be converted to a format suitable for the Facebook API and
  18  * long posts truncated - with a link to view the full post.
  19  *
  20  * Facebook contacts will not be able to view private photos, as they are not able to
  21  * authenticate to your site to establish identity. We will address this
  22  * in a future release.
  23  */
  24
  25 define('FACEBOOK_DEFAULT_POLL_INTERVAL', 5); // given in minutes
  26
  27 require_once('include/security.php');
  28
  29 function fbpost_install() {
  30         register_hook('post_local',       'addon/fbpost/fbpost.php', 'fbpost_post_local');
  31         register_hook('notifier_normal',  'addon/fbpost/fbpost.php', 'fbpost_post_hook');
  32         register_hook('jot_networks',     'addon/fbpost/fbpost.php', 'fbpost_jot_nets');
  33         register_hook('connector_settings',  'addon/fbpost/fbpost.php', 'fbpost_plugin_settings');
  34         register_hook('enotify',          'addon/fbpost/fbpost.php', 'fbpost_enotify');
  35         register_hook('queue_predeliver', 'addon/fbpost/fbpost.php', 'fbpost_queue_hook');
  36         register_hook('cron',             'addon/fbpost/fbpost.php', 'fbpost_cron');
  37         register_hook('prepare_body',     'addon/fbpost/fbpost.php', 'fbpost_prepare_body');
  38 }
  39
  40
  41 function fbpost_uninstall() {
  42         unregister_hook('post_local',       'addon/fbpost/fbpost.php', 'fbpost_post_local');
  43         unregister_hook('notifier_normal',  'addon/fbpost/fbpost.php', 'fbpost_post_hook');
  44         unregister_hook('jot_networks',     'addon/fbpost/fbpost.php', 'fbpost_jot_nets');
  45         unregister_hook('connector_settings',  'addon/fbpost/fbpost.php', 'fbpost_plugin_settings');
  46         unregister_hook('enotify',          'addon/fbpost/fbpost.php', 'fbpost_enotify');
  47         unregister_hook('queue_predeliver', 'addon/fbpost/fbpost.php', 'fbpost_queue_hook');
  48         unregister_hook('cron',             'addon/fbpost/fbpost.php', 'fbpost_cron');
  49         unregister_hook('prepare_body',     'addon/fbpost/fbpost.php', 'fbpost_prepare_body');
  50 }
  51
  52
  53 /* declare the fbpost_module function so that /fbpost url requests will land here */
  54
  55 function fbpost_module() {}
  56
  57
  58
  59 // If a->argv[1] is a nickname, this is a callback from Facebook oauth requests.
  60 // If $_REQUEST["realtime_cb"] is set, this is a callback from the Real-Time Updates API
  61
  62 /**
  63  * @param App $a
  64  */
  65 function fbpost_init(&$a) {
  66
  67         if($a->argc != 2)
  68                 return;
  69
  70         $nick = $a->argv[1];
  71
  72         if(strlen($nick))
  73                 $r = q("SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1",
  74                         dbesc($nick)
  75                 );
  76         if(!(isset($r) && count($r)))
  77                 return;
  78
  79         $uid           = $r[0]['uid'];
  80         $auth_code     = (x($_GET, 'code') ? $_GET['code'] : '');
  81         $error         = (x($_GET, 'error_description') ? $_GET['error_description'] : '');
  82
  83
  84         if($error)
  85                 logger('fbpost_init: Error: ' . $error);
  86
  87         if($auth_code && $uid) {
  88
  89                 $appid = get_config('facebook','appid');
  90                 $appsecret = get_config('facebook', 'appsecret');
  91
  92                 $x = fetch_url('https://graph.facebook.com/oauth/access_token?client_id='
  93                         . $appid . '&client_secret=' . $appsecret . '&redirect_uri='
  94                         . urlencode($a->get_baseurl() . '/fbpost/' . $nick)
  95                         . '&code=' . $auth_code);
  96
  97                 logger('fbpost_init: returned access token: ' . $x, LOGGER_DATA);
  98
  99                 if(strpos($x,'access_token=') !== false) {
 100                         $token = str_replace('access_token=', '', $x);
 101                         if(strpos($token,'&') !== false)
 102                                 $token = substr($token,0,strpos($token,'&'));
 103                         set_pconfig($uid,'facebook','access_token',$token);
 104                         set_pconfig($uid,'facebook','post','1');
 105                         fbpost_get_self($uid);
 106                 }
 107
 108         }
 109
 110 }
 111
 112
 113 /**
 114  * @param int $uid
 115  */
 116 function fbpost_get_self($uid) {
 117         $access_token = get_pconfig($uid,'facebook','access_token');
 118         if(! $access_token)
 119                 return;
 120         $s = fetch_url('https://graph.facebook.com/me/?access_token=' . $access_token);
 121         if($s) {
 122                 $j = json_decode($s);
 123                 set_pconfig($uid,'facebook','self_id',(string) $j->id);
 124         }
 125 }
 126
 127
 128 // This is the POST method to the facebook settings page
 129 // Content is posted to Facebook in the function facebook_post_hook()
 130
 131 /**
 132  * @param App $a
 133  */
 134 function fbpost_post(&$a) {
 135
 136         $uid = local_user();
 137         if($uid){
 138
 139                 $value = ((x($_POST,'post_by_default')) ? intval($_POST['post_by_default']) : 0);
 140                 set_pconfig($uid,'facebook','post_by_default', $value);
 141
 142                 $value = ((x($_POST,'mirror_posts')) ? intval($_POST['mirror_posts']) : 0);
 143                 set_pconfig($uid,'facebook','mirror_posts', $value);
 144
 145                 if (!$value)
 146                         del_pconfig($uid,'facebook','last_created');
 147
 148                 $value = ((x($_POST,'suppress_view_on_friendica')) ? intval($_POST['suppress_view_on_friendica']) : 0);
 149                 set_pconfig($uid,'facebook','suppress_view_on_friendica', $value);
 150
 151                 $value = ((x($_POST,'post_to_page')) ? $_POST['post_to_page'] : "0-0");
 152                 $values = explode("-", $value);
 153                 set_pconfig($uid,'facebook','post_to_page', $values[0]);
 154                 set_pconfig($uid,'facebook','page_access_token', $values[1]);
 155
 156                 $result = q("SELECT `installed` FROM `addon` WHERE `name` = 'fbsync' AND `installed`");
 157                 if (count($result) > 0) {
 158                         set_pconfig(local_user(),'fbsync','sync',intval($_POST['fbsync']));
 159                         set_pconfig(local_user(),'fbsync','create_user',intval($_POST['create_user']));
 160                 }
 161
 162                 info( t('Settings updated.') . EOL);
 163         }
 164
 165         return;
 166 }
 167
 168 // Facebook settings form
 169
 170 /**
 171  * @param App $a
 172  * @return string
 173  */
 174 function fbpost_content(&$a) {
 175
 176         if(! local_user()) {
 177                 notice( t('Permission denied.') . EOL);
 178                 return '';
 179         }
 180
 181
 182         if(! service_class_allows(local_user(),'facebook_connect')) {
 183                 notice( t('Permission denied.') . EOL);
 184                 return upgrade_bool_message();
 185         }
 186
 187
 188         if($a->argc > 1 && $a->argv[1] === 'remove') {
 189                 del_pconfig(local_user(),'facebook','post');
 190                 info( t('Facebook Post disabled') . EOL);
 191         }
 192
 193         require_once("mod/settings.php");
 194         settings_init($a);
 195
 196         $o = '';
 197         $accounts = array();
 198
 199         $fb_installed = false;
 200         if (get_pconfig(local_user(),'facebook','post')) {
 201                 $access_token = get_pconfig(local_user(),'facebook','access_token');
 202                 if ($access_token) {
 203                         // fetching the list of accounts to check, if facebook is working
 204                         // The value is needed several lines below.
 205                         $url = 'https://graph.facebook.com/me/accounts';
 206                         $s = fetch_url($url."?access_token=".$access_token, false, $redirects, 10);
 207                         if($s) {
 208                                 $accounts = json_decode($s);
 209                                 if (isset($accounts->data))
 210                                         $fb_installed = true;
 211                         }
 212
 213                         // I'm not totally sure, if this above will work in every situation,
 214                         // So this old code will be called as well.
 215                         if (!$fb_installed) {
 216                                 $url ="https://graph.facebook.com/me/feed";
 217                                 $s = fetch_url($url."?access_token=".$access_token."&limit=1", false, $redirects, 10);
 218                                 if($s) {
 219                                         $j = json_decode($s);
 220                                         if (isset($j->data))
 221                                                 $fb_installed = true;
 222                                 }
 223                         }
 224                 }
 225         }
 226
 227         $appid = get_config('facebook','appid');
 228
 229         if(! $appid) {
 230                 notice( t('Facebook API key is missing.') . EOL);
 231                 return '';
 232         }
 233
 234         $a->page['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="'
 235                 . $a->get_baseurl() . '/addon/fbpost/fbpost.css' . '" media="all" />' . "\r\n";
 236
 237         $result = q("SELECT `installed` FROM `addon` WHERE `name` = 'fbsync' AND `installed`");
 238         $fbsync = (count($result) > 0);
 239
 240         if($fbsync)
 241                 $title = t('Facebook Import/Export/Mirror');
 242         else
 243                 $title = t('Facebook Export/Mirror');
 244
 245         $o .= '<img class="connector" src="images/facebook.png" /><h3 class="connector">'.$title.'</h3>';
 246
 247         if(! $fb_installed) {
 248                 $o .= '<div id="fbpost-enable-wrapper">';
 249
 250                 //read_stream,publish_stream,manage_pages,photo_upload,user_groups,offline_access
 251
 252                 $o .= '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $appid . '&redirect_uri='
 253                         . $a->get_baseurl() . '/fbpost/' . $a->user['nickname'] . '&scope=export_stream,read_stream,publish_stream,manage_pages,photo_upload,user_groups,publish_actions,user_friends,share_item,video_upload,status_update">' . t('Install Facebook Post connector for this account.') . '</a>';
 254                 $o .= '</div>';
 255         }
 256
 257         if($fb_installed) {
 258                 $o .= '<div id="fbpost-disable-wrapper">';
 259
 260                 $o .= '<a href="' . $a->get_baseurl() . '/fbpost/remove' . '">' . t('Remove Facebook Post connector') . '</a></div>';
 261
 262                 $o .= '<div id="fbpost-enable-wrapper">';
 263
 264                 $o .= '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $appid . '&redirect_uri='
 265                         . $a->get_baseurl() . '/fbpost/' . $a->user['nickname'] . '&scope=export_stream,read_stream,publish_stream,manage_pages,photo_upload,user_groups,publish_actions,user_friends,share_item,video_upload,status_update">' . t('Re-authenticate [This is necessary whenever your Facebook password is changed.]') . '</a>';
 266                 $o .= '</div>';
 267
 268                 $o .= '<div id="fbpost-post-default-form">';
 269                 $o .= '<form action="fbpost" method="post" >';
 270                 $post_by_default = get_pconfig(local_user(),'facebook','post_by_default');
 271                 $checked = (($post_by_default) ? ' checked="checked" ' : '');
 272                 $o .= '<input type="checkbox" name="post_by_default" value="1"' . $checked . '/>' . ' ' . t('Post to Facebook by default') . EOL;
 273
 274                 $suppress_view_on_friendica = get_pconfig(local_user(),'facebook','suppress_view_on_friendica');
 275                 $checked = (($suppress_view_on_friendica) ? ' checked="checked" ' : '');
 276                 $o .= '<input type="checkbox" name="suppress_view_on_friendica" value="1"' . $checked . '/>' . ' ' . t('Suppress "View on friendica"') . EOL;
 277
 278                 $mirror_posts = get_pconfig(local_user(),'facebook','mirror_posts');
 279                 $checked = (($mirror_posts) ? ' checked="checked" ' : '');
 280                 $o .= '<input type="checkbox" name="mirror_posts" value="1"' . $checked . '/>' . ' ' . t('Mirror wall posts from facebook to friendica.') . EOL;
 281
 282                 // List all pages
 283                 $post_to_page = get_pconfig(local_user(),'facebook','post_to_page');
 284                 $page_access_token = get_pconfig(local_user(),'facebook','page_access_token');
 285                 $fb_token  = get_pconfig($a->user['uid'],'facebook','access_token');
 286                 //$url = 'https://graph.facebook.com/me/accounts';
 287                 //$x = fetch_url($url."?access_token=".$fb_token, false, $redirects, 10);
 288                 //$accounts = json_decode($x);
 289
 290                 $o .= t("Post to page/group:")."<select name='post_to_page'>";
 291                 if (intval($post_to_page) == 0)
 292                         $o .= "<option value='0-0' selected>".t('None')."</option>";
 293                 else
 294                         $o .= "<option value='0-0'>".t('None')."</option>";
 295
 296                 foreach($accounts->data as $account) {
 297                         if (is_array($account->perms))
 298                                 if ($post_to_page == $account->id)
 299                                         $o .= "<option value='".$account->id."-".$account->access_token."' selected>".$account->name."</option>";
 300                                 else
 301                                         $o .= "<option value='".$account->id."-".$account->access_token."'>".$account->name."</option>";
 302                 }
 303
 304                 $url = 'https://graph.facebook.com/me/groups';
 305                 $x = fetch_url($url."?access_token=".$fb_token, false, $redirects, 10);
 306                 $groups = json_decode($x);
 307
 308                 foreach($groups->data as $group) {
 309                         if ($post_to_page == $group->id)
 310                                 $o .= "<option value='".$group->id."-0' selected>".$group->name."</option>";
 311                         else
 312                                 $o .= "<option value='".$group->id."-0'>".$group->name."</option>";
 313                 }
 314
 315                 $o .= "</select>";
 316
 317                 if ($fbsync) {
 318
 319                         $o .= '<div class="clear"></div>';
 320
 321                         $sync_enabled = get_pconfig(local_user(),'fbsync','sync');
 322                         $checked = (($sync_enabled) ? ' checked="checked" ' : '');
 323                         $o .= '<input type="checkbox" name="fbsync" value="1"' . $checked . '/>' . ' ' . t('Import Facebook newsfeed.') . EOL;
 324
 325                         $create_user = get_pconfig(local_user(),'fbsync','create_user');
 326                         $checked = (($create_user) ? ' checked="checked" ' : '');
 327                         $o .= '<input type="checkbox" name="create_user" value="1"' . $checked . '/>' . ' ' . t('Automatically create contacts.') . EOL;
 328
 329                 }
 330                 $o .= '<p><input type="submit" name="submit" value="' . t('Save Settings') . '" /></form></div>';
 331         }
 332
 333         return $o;
 334 }
 335
 336 /**
 337  * @param App $a
 338  * @param null|object $b
 339  */
 340 function fbpost_plugin_settings(&$a,&$b) {
 341
 342         $enabled = get_pconfig(local_user(),'facebook','post');
 343         $css = (($enabled) ? '' : '-disabled');
 344
 345         $result = q("SELECT `installed` FROM `addon` WHERE `name` = 'fbsync' AND `installed`");
 346         if(count($result) > 0)
 347                 $title = t('Facebook Import/Export/Mirror');
 348         else
 349                 $title = t('Facebook Export/Mirror');
 350
 351         $b .= '<div class="settings-block">';
 352         $b .= '<a href="fbpost"><img class="connector'.$css.'" src="images/facebook.png" /><h3 class="connector">'.$title.'</h3></a>';
 353         $b .= '</div>';
 354 }
 355
 356
 357 /**
 358  * @param App $a
 359  * @param null|object $o
 360  */
 361 function fbpost_plugin_admin(&$a, &$o){
 362
 363
 364         $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("fbsave") . '">';
 365
 366         $o .= '<h4>' . t('Facebook API Key') . '</h4>';
 367
 368         $appid  = get_config('facebook', 'appid'  );
 369         $appsecret = get_config('facebook', 'appsecret' );
 370
 371         $ret1 = q("SELECT `v` FROM `config` WHERE `cat` = 'facebook' AND `k` = 'appid' LIMIT 1");
 372         $ret2 = q("SELECT `v` FROM `config` WHERE `cat` = 'facebook' AND `k` = 'appsecret' LIMIT 1");
 373         if ((count($ret1) > 0 && $ret1[0]['v'] != $appid) || (count($ret2) > 0 && $ret2[0]['v'] != $appsecret)) $o .= t('Error: it appears that you have specified the App-ID and -Secret in your .htconfig.php file. As long as they are specified there, they cannot be set using this form.<br><br>');
 374
 375         $o .= '<label for="fb_appid">' . t('App-ID / API-Key') . '</label><input id="fb_appid" name="appid" type="text" value="' . escape_tags($appid ? $appid : "") . '"><br style="clear: both;">';
 376         $o .= '<label for="fb_appsecret">' . t('Application secret') . '</label><input id="fb_appsecret" name="appsecret" type="text" value="' . escape_tags($appsecret ? $appsecret : "") . '"><br style="clear: both;">';
 377
 378         $o .= '<input type="submit" name="fb_save_keys" value="' . t('Save') . '">';
 379
 380 }
 381
 382 /**
 383  * @param App $a
 384  */
 385
 386 function fbpost_plugin_admin_post(&$a){
 387         check_form_security_token_redirectOnErr('/admin/plugins/fbpost', 'fbsave');
 388
 389         if (x($_REQUEST,'fb_save_keys')) {
 390                 set_config('facebook', 'appid', $_REQUEST['appid']);
 391                 set_config('facebook', 'appsecret', $_REQUEST['appsecret']);
 392
 393                 info(t('The new values have been saved.'));
 394         }
 395
 396 }
 397
 398 /**
 399  * @param App $a
 400  * @param object $b
 401  * @return mixed
 402  */
 403 function fbpost_jot_nets(&$a,&$b) {
 404         if(! local_user())
 405                 return;
 406
 407         $fb_post = get_pconfig(local_user(),'facebook','post');
 408         if(intval($fb_post) == 1) {
 409                 $fb_defpost = get_pconfig(local_user(),'facebook','post_by_default');
 410                 $selected = ((intval($fb_defpost) == 1) ? ' checked="checked" ' : '');
 411                 $b .= '<div class="profile-jot-net"><input type="checkbox" name="facebook_enable"' . $selected . ' value="1" /> '
 412                         . t('Post to Facebook') . '</div>';
 413         }
 414 }
 415
 416 /**
 417  * @param App $a
 418  * @param object $b
 419  * @return mixed
 420  */
 421 function fbpost_post_hook(&$a,&$b) {
 422
 423         logger('fbpost_post_hook: Facebook post invoked', LOGGER_DEBUG);
 424
 425         if($b['deleted'] || ($b['created'] !== $b['edited']))
 426                 return;
 427
 428         logger('fbpost_post_hook: Facebook post first check successful', LOGGER_DEBUG);
 429
 430         // if post comes from facebook don't send it back
 431         if(($b['app'] == "Facebook") AND ($b['verb'] != ACTIVITY_LIKE))
 432                 return;
 433
 434         logger('fbpost_post_hook: Facebook post accepted', LOGGER_DEBUG);
 435
 436         /**
 437          * Post to Facebook stream
 438          */
 439
 440         require_once('include/group.php');
 441         require_once('include/html2plain.php');
 442
 443
 444         $reply = false;
 445         $likes = false;
 446
 447         $deny_arr = array();
 448         $allow_arr = array();
 449
 450         $toplevel = (($b['id'] == $b['parent']) ? true : false);
 451
 452
 453         $linking = ((get_pconfig($b['uid'],'facebook','no_linking')) ? 0 : 1);
 454
 455         if((!$toplevel) && ($linking)) {
 456                 $r = q("SELECT * FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 457                         intval($b['parent']),
 458                         intval($b['uid'])
 459                 );
 460                 //$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 461                 //      dbesc($b['parent-uri']),
 462                 //      intval($b['uid'])
 463                 //);
 464
 465                 // is it a reply to a facebook post?
 466                 // A reply to a toplevel post is only allowed for "real" facebook posts
 467                 if(count($r) && substr($r[0]['uri'],0,4) === 'fb::')
 468                         $reply = substr($r[0]['uri'],4);
 469                 elseif(count($r) && (substr($r[0]['extid'],0,4) === 'fb::') AND ($r[0]['id'] != $r[0]['parent']))
 470                         $reply = substr($r[0]['extid'],4);
 471                 else
 472                         return;
 473
 474                 $u = q("SELECT * FROM user where uid = %d limit 1",
 475                         intval($b['uid'])
 476                 );
 477                 if(! count($u))
 478                         return;
 479
 480                 // only accept comments from the item owner. Other contacts are unknown to FB.
 481
 482                 if(! link_compare($b['author-link'], $a->get_baseurl() . '/profile/' . $u[0]['nickname']))
 483                         return;
 484
 485
 486                 logger('fbpost_post_hook: facebook reply id=' . $reply);
 487         }
 488
 489         if(strstr($b['postopts'],'facebook') || ($b['private']) || ($reply)) {
 490
 491                 if($b['private'] && $reply === false) {
 492                         $allow_people = expand_acl($b['allow_cid']);
 493                         $allow_groups = expand_groups(expand_acl($b['allow_gid']));
 494                         $deny_people  = expand_acl($b['deny_cid']);
 495                         $deny_groups  = expand_groups(expand_acl($b['deny_gid']));
 496
 497                         $recipients = array_unique(array_merge($allow_people,$allow_groups));
 498                         $deny = array_unique(array_merge($deny_people,$deny_groups));
 499
 500                         $allow_str = dbesc(implode(', ',$recipients));
 501                         if($allow_str) {
 502                                 logger("fbpost_post_hook: private post to: ".$allow_str, LOGGER_DEBUG);
 503                                 $r = q("SELECT `notify` FROM `contact` WHERE `id` IN ( $allow_str ) AND `network` = 'face'");
 504                                 if(count($r))
 505                                         foreach($r as $rr)
 506                                                 $allow_arr[] = $rr['notify'];
 507                         }
 508
 509                         $deny_str = dbesc(implode(', ',$deny));
 510                         if($deny_str) {
 511                                 $r = q("SELECT `notify` FROM `contact` WHERE `id` IN ( $deny_str ) AND `network` = 'face'");
 512                                 if(count($r))
 513                                         foreach($r as $rr)
 514                                                 $deny_arr[] = $rr['notify'];
 515                         }
 516
 517                         if(count($deny_arr) && (! count($allow_arr))) {
 518
 519                                 // One or more FB folks were denied access but nobody on FB was specifically allowed access.
 520                                 // This might cause the post to be open to public on Facebook, but only to selected members
 521                                 // on another network. Since this could potentially leak a post to somebody who was denied,
 522                                 // we will skip posting it to Facebook with a slightly vague but relevant message that will
 523                                 // hopefully lead somebody to this code comment for a better explanation of what went wrong.
 524
 525                                 notice( t('Post to Facebook cancelled because of multi-network access permission conflict.') . EOL);
 526                                 return;
 527                         }
 528
 529
 530                         // if it's a private message but no Facebook members are allowed or denied, skip Facebook post
 531
 532                         if((! count($allow_arr)) && (! count($deny_arr)))
 533                                 return;
 534                 }
 535
 536                 if($b['verb'] == ACTIVITY_LIKE) {
 537                         $likes = true;
 538                         logger('fbpost_post_hook: liking '.print_r($b, true), LOGGER_DEBUG);
 539                 }
 540
 541
 542                 $appid  = get_config('facebook', 'appid'  );
 543                 $secret = get_config('facebook', 'appsecret' );
 544
 545                 if($appid && $secret) {
 546
 547                         logger('fbpost_post_hook: have appid+secret');
 548
 549                         $fb_token  = get_pconfig($b['uid'],'facebook','access_token');
 550
 551
 552                         // post to facebook if it's a public post and we've ticked the 'post to Facebook' box,
 553                         // or it's a private message with facebook participants
 554                         // or it's a reply or likes action to an existing facebook post
 555
 556                         if($fb_token && ($toplevel || $b['private'] || $reply)) {
 557                                 logger('fbpost_post_hook: able to post');
 558                                 require_once('library/facebook.php');
 559                                 require_once('include/bbcode.php');
 560
 561                                 $msg = $b['body'];
 562
 563                                 logger('fbpost_post_hook: original msg=' . $msg, LOGGER_DATA);
 564
 565                                 if ($toplevel) {
 566                                         require_once("include/plaintext.php");
 567                                         $msgarr = plaintext($a, $b, 0, false, 9);
 568                                         $msg = $msgarr["text"];
 569                                         $link = $msgarr["url"];
 570                                         $linkname = $msgarr["title"];
 571
 572                                         if ($msgarr["type"] != "video")
 573                                                 $image = $msgarr["image"];
 574
 575                                         // Fallback - if message is empty
 576                                         if(!strlen($msg))
 577                                                 $msg = $linkname;
 578
 579                                         if(!strlen($msg))
 580                                                 $msg = $link;
 581
 582                                         if(!strlen($msg))
 583                                                 $msg = $image;
 584                                 } else {
 585                                         require_once("include/bbcode.php");
 586                                         require_once("include/html2plain.php");
 587                                         $msg = bb_CleanPictureLinks($msg);
 588                                         $msg = bbcode($msg, false, false, 2, true);
 589                                         $msg = trim(html2plain($msg, 0));
 590                                         $link = "";
 591                                         $image = "";
 592                                         $linkname = "";
 593                                 }
 594
 595                                 // If there is nothing to post then exit
 596                                 if(!strlen($msg))
 597                                         return;
 598
 599                                 logger('fbpost_post_hook: msg=' . $msg, LOGGER_DATA);
 600
 601                                 $video = "";
 602
 603                                 if($likes) {
 604                                         $postvars = array('access_token' => $fb_token);
 605                                 } else {
 606                                         // message, picture, link, name, caption, description, source, place, tags
 607                                         //if(trim($link) != "")
 608                                         //      if (@exif_imagetype($link) != 0) {
 609                                         //              $image = $link;
 610                                         //              $link = "";
 611                                         //      }
 612
 613                                         $postvars = array(
 614                                                 'access_token' => $fb_token,
 615                                                 'message' => $msg
 616                                         );
 617                                         if(trim($image) != "")
 618                                                 $postvars['picture'] = $image;
 619
 620                                         if(trim($link) != "") {
 621                                                 $postvars['link'] = $link;
 622
 623                                                 if ((stristr($link,'youtube')) || (stristr($link,'youtu.be')) || (stristr($link,'vimeo'))) {
 624                                                         $video = $link;
 625                                                 }
 626                                         }
 627                                         if(trim($linkname) != "")
 628                                                 $postvars['name'] = $linkname;
 629                                 }
 630
 631                                 if(($b['private']) && ($toplevel)) {
 632                                         $postvars['privacy'] = '{"value": "CUSTOM", "friends": "SOME_FRIENDS"';
 633                                         if(count($allow_arr))
 634                                                 $postvars['privacy'] .= ',"allow": "' . implode(',',$allow_arr) . '"';
 635                                         if(count($deny_arr))
 636                                                 $postvars['privacy'] .= ',"deny": "' . implode(',',$deny_arr) . '"';
 637                                         $postvars['privacy'] .= '}';
 638
 639                                 }
 640
 641                                 $post_to_page = get_pconfig($b['uid'],'facebook','post_to_page');
 642                                 $page_access_token = get_pconfig($b['uid'],'facebook','page_access_token');
 643                                 if ((intval($post_to_page) != 0) and ($page_access_token != ""))
 644                                         $target = $post_to_page;
 645                                 else
 646                                         $target = "me";
 647
 648                                 if($reply) {
 649                                         $url = 'https://graph.facebook.com/' . $reply . '/' . (($likes) ? 'likes' : 'comments');
 650                                 } else if (($video != "") or (($image == "") and ($link != ""))) {
 651                                         // If it is a link to a video or a link without a preview picture then post it as a link
 652                                         if ($video != "")
 653                                                 $link = $video;
 654
 655                                         $postvars = array(
 656                                                 'access_token' => $fb_token,
 657                                                 'link' => $link,
 658                                         );
 659                                         if ($msg != $video)
 660                                                 $postvars['message'] = $msg;
 661
 662                                         $url = 'https://graph.facebook.com/'.$target.'/links';
 663                                 } else if (($link == "") and ($image != "")) {
 664                                         // If it is only an image without a page link then post this image as a photo
 665                                         $postvars = array(
 666                                                 'access_token' => $fb_token,
 667                                                 'url' => $image,
 668                                         );
 669                                         if ($msg != $image)
 670                                                 $postvars['message'] = $msg;
 671
 672                                         $url = 'https://graph.facebook.com/'.$target.'/photos';
 673                                 //} else if (($link != "") or ($image != "") or ($b['title'] == '') or (strlen($msg) < 500)) {
 674                                 } else {
 675                                         $url = 'https://graph.facebook.com/'.$target.'/feed';
 676                                         if (!get_pconfig($b['uid'],'facebook','suppress_view_on_friendica') and $b['plink'])
 677                                                 $postvars['actions'] = '{"name": "' . t('View on Friendica') . '", "link": "' .  $b['plink'] . '"}';
 678                                 }
 679 /*                              } else {
 680                                         // if its only a message and a subject and the message is larger than 500 characters then post it as note
 681                                         $postvars = array(
 682                                                 'access_token' => $fb_token,
 683                                                 'message' => bbcode($b['body'], false, false),
 684                                                 'subject' => $b['title'],
 685                                         );
 686                                         $url = 'https://graph.facebook.com/'.$target.'/notes';
 687                                 } */
 688
 689                                 // Post to page?
 690                                 if (!$reply and ($target != "me") and $page_access_token)
 691                                         $postvars['access_token'] = $page_access_token;
 692
 693                                 logger('fbpost_post_hook: post to ' . $url);
 694                                 logger('fbpost_post_hook: postvars: ' . print_r($postvars,true));
 695
 696                                 // "test_mode" prevents anything from actually being posted.
 697                                 // Otherwise, let's do it.
 698
 699                                 if(!get_config('facebook','test_mode')) {
 700                                         $x = post_url($url, $postvars);
 701                                         logger('fbpost_post_hook: post returns: ' . $x, LOGGER_DEBUG);
 702
 703                                         $retj = json_decode($x);
 704                                         if($retj->id) {
 705                                                 // Only set the extid when it isn't the toplevel post
 706                                                 q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d AND `parent` != %d",
 707                                                         dbesc('fb::' . $retj->id),
 708                                                         intval($b['id']),
 709                                                         intval($b['id'])
 710                                                 );
 711                                         } else {
 712                                                 // Sometimes posts are accepted from facebook although it telling an error
 713                                                 // This leads to endless comment flooding.
 714
 715                                                 // If it is a special kind of failure the post was receiced
 716                                                 // Although facebook said it wasn't received ...
 717                                                 if (!$likes AND (($retj->error->type != "OAuthException") OR ($retj->error->code != 2)) AND ($x <> "")) {
 718                                                         $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `self`", intval($b['uid']));
 719                                                         if (count($r))
 720                                                                 $a->contact = $r[0]["id"];
 721
 722                                                         $s = serialize(array('url' => $url, 'item' => $b['id'], 'post' => $postvars));
 723                                                         require_once('include/queue_fn.php');
 724                                                         add_to_queue($a->contact,NETWORK_FACEBOOK,$s);
 725                                                         logger('fbpost_post_hook: Post failed, requeued.', LOGGER_DEBUG);
 726                                                         notice( t('Facebook post failed. Queued for retry.') . EOL);
 727                                                 }
 728
 729                                                 if (isset($retj->error) && $retj->error->type == "OAuthException" && $retj->error->code == 190) {
 730                                                         logger('fbpost_post_hook: Facebook session has expired due to changed password.', LOGGER_DEBUG);
 731
 732                                                         $last_notification = get_pconfig($b['uid'], 'facebook', 'session_expired_mailsent');
 733                                                         if (!$last_notification || $last_notification < (time() - FACEBOOK_SESSION_ERR_NOTIFICATION_INTERVAL)) {
 734                                                                 require_once('include/enotify.php');
 735
 736                                                                 $r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($b['uid']));
 737                                                                 notification(array(
 738                                                                         'uid' => $b['uid'],
 739                                                                         'type' => NOTIFY_SYSTEM,
 740                                                                         'system_type' => 'facebook_connection_invalid',
 741                                                                         'language'     => $r[0]['language'],
 742                                                                         'to_name'      => $r[0]['username'],
 743                                                                         'to_email'     => $r[0]['email'],
 744                                                                         'source_name'  => t('Administrator'),
 745                                                                         'source_link'  => $a->config["system"]["url"],
 746                                                                         'source_photo' => $a->config["system"]["url"] . '/images/person-80.jpg',
 747                                                                 ));
 748
 749                                                                 set_pconfig($b['uid'], 'facebook', 'session_expired_mailsent', time());
 750                                                         } else logger('fbpost_post_hook: No notification, as the last one was sent on ' . $last_notification, LOGGER_DEBUG);
 751                                                 }
 752                                         }
 753                                 }
 754                         }
 755                 }
 756         }
 757 }
 758
 759 /**
 760  * @param App $app
 761  * @param object $data
 762  */
 763 function fbpost_enotify(&$app, &$data) {
 764         if (x($data, 'params') && $data['params']['type'] == NOTIFY_SYSTEM && x($data['params'], 'system_type') && $data['params']['system_type'] == 'facebook_connection_invalid') {
 765                 $data['itemlink'] = '/fbpost';
 766                 $data['epreamble'] = $data['preamble'] = t('Your Facebook connection became invalid. Please Re-authenticate.');
 767                 $data['subject'] = t('Facebook connection became invalid');
 768                 $data['body'] = sprintf( t("Hi %1\$s,\n\nThe connection between your accounts on %2\$s and Facebook became invalid. This usually happens after you change your Facebook-password. To enable the connection again, you have to %3\$sre-authenticate the Facebook-connector%4\$s."), $data['params']['to_name'], "[url=" . $app->config["system"]["url"] . "]" . $app->config["sitename"] . "[/url]", "[url=" . $app->config["system"]["url"] . "/fbpost]", "[/url]");
 769         }
 770 }
 771
 772 /**
 773  * @param App $a
 774  * @param object $b
 775  */
 776 function fbpost_post_local(&$a,&$b) {
 777
 778         // Figure out if Facebook posting is enabled for this post and file it in 'postopts'
 779         // where we will discover it during background delivery.
 780
 781         // This can only be triggered by a local user posting to their own wall.
 782
 783         if((local_user()) && (local_user() == $b['uid'])) {
 784
 785                 $fb_post   = intval(get_pconfig(local_user(),'facebook','post'));
 786                 $fb_enable = (($fb_post && x($_REQUEST,'facebook_enable')) ? intval($_REQUEST['facebook_enable']) : 0);
 787
 788                 // if API is used, default to the chosen settings
 789                 // but allow a specific override
 790
 791                 if($_REQUEST['api_source'] && intval(get_pconfig(local_user(),'facebook','post_by_default'))) {
 792                         if(! x($_REQUEST,'facebook_enable'))
 793                                 $fb_enable = 1;
 794                 }
 795
 796                 if(! $fb_enable)
 797                         return;
 798
 799                 if(strlen($b['postopts']))
 800                         $b['postopts'] .= ',';
 801                 $b['postopts'] .= 'facebook';
 802         }
 803 }
 804
 805
 806 /**
 807  * @param App $a
 808  * @param object $b
 809  */
 810 function fbpost_queue_hook(&$a,&$b) {
 811
 812         $qi = q("SELECT * FROM `queue` WHERE `network` = '%s'",
 813                 dbesc(NETWORK_FACEBOOK)
 814         );
 815         if(! count($qi))
 816                 return;
 817
 818         require_once('include/queue_fn.php');
 819
 820         foreach($qi as $x) {
 821                 if($x['network'] !== NETWORK_FACEBOOK)
 822                         continue;
 823
 824                 logger('fbpost_queue_hook: run');
 825
 826                 $r = q("SELECT `user`.* FROM `user` LEFT JOIN `contact` on `contact`.`uid` = `user`.`uid`
 827                         WHERE `contact`.`self` = 1 AND `contact`.`id` = %d LIMIT 1",
 828                         intval($x['cid'])
 829                 );
 830                 if(! count($r)) {
 831                         logger('fbpost_queue_hook: no user found for entry '.print_r($x, true));
 832                         update_queue_time($x['id']);
 833                         continue;
 834                 }
 835
 836                 $user = $r[0];
 837
 838                 $appid  = get_config('facebook', 'appid'  );
 839                 $secret = get_config('facebook', 'appsecret' );
 840
 841                 if($appid && $secret) {
 842                         $fb_post   = intval(get_pconfig($user['uid'],'facebook','post'));
 843                         $fb_token  = get_pconfig($user['uid'],'facebook','access_token');
 844
 845                         if($fb_post && $fb_token) {
 846                                 logger('fbpost_queue_hook: able to post');
 847                                 require_once('library/facebook.php');
 848
 849                                 $z = unserialize($x['content']);
 850                                 $item = $z['item'];
 851                                 $j = post_url($z['url'],$z['post']);
 852
 853                                 $retj = json_decode($j);
 854                                 if($retj->id) {
 855                                         // Only set the extid when it isn't the toplevel post
 856                                         q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d AND `parent` != %d",
 857                                                 dbesc('fb::' . $retj->id),
 858                                                 intval($item),
 859                                                 intval($item)
 860                                         );
 861                                         logger('fbpost_queue_hook: success: ' . $j);
 862                                         remove_queue_item($x['id']);
 863                                 } else {
 864                                         logger('fbpost_queue_hook: failed: ' . $j);
 865
 866                                         // If it is a special kind of failure the post was receiced
 867                                         // Although facebook said it wasn't received ...
 868                                         $ret = json_decode($j);
 869                                         if (($ret->error->type != "OAuthException") OR ($ret->error->code != 2) AND ($j <> ""))
 870                                                 update_queue_time($x['id']);
 871                                         else
 872                                                 logger('fbpost_queue_hook: Not requeued, since it seems to be received');
 873                                 }
 874                         } else {
 875                                 logger('fbpost_queue_hook: No fb_post or fb_token.');
 876                                 update_queue_time($x['id']);
 877                         }
 878                 } else {
 879                         logger('fbpost_queue_hook: No appid or secret.');
 880                         update_queue_time($x['id']);
 881                 }
 882         }
 883 }
 884
 885
 886 /**
 887  * @return bool|string
 888  */
 889 function fbpost_get_app_access_token() {
 890
 891         $acc_token = get_config('facebook','app_access_token');
 892
 893         if ($acc_token !== false) return $acc_token;
 894
 895         $appid = get_config('facebook','appid');
 896         $appsecret = get_config('facebook', 'appsecret');
 897
 898         if ($appid === false || $appsecret === false) {
 899                 logger('fb_get_app_access_token: appid and/or appsecret not set', LOGGER_DEBUG);
 900                 return false;
 901         }
 902         logger('https://graph.facebook.com/oauth/access_token?client_id=' . $appid . '&client_secret=' . $appsecret . '&grant_type=client_credentials', LOGGER_DATA);
 903         $x = fetch_url('https://graph.facebook.com/oauth/access_token?client_id=' . $appid . '&client_secret=' . $appsecret . '&grant_type=client_credentials');
 904
 905         if(strpos($x,'access_token=') !== false) {
 906                 logger('fb_get_app_access_token: returned access token: ' . $x, LOGGER_DATA);
 907
 908                 $token = str_replace('access_token=', '', $x);
 909                 if(strpos($token,'&') !== false)
 910                         $token = substr($token,0,strpos($token,'&'));
 911
 912                 if ($token == "") {
 913                         logger('fb_get_app_access_token: empty token: ' . $x, LOGGER_DEBUG);
 914                         return false;
 915                 }
 916                 set_config('facebook','app_access_token',$token);
 917                 return $token;
 918         } else {
 919                 logger('fb_get_app_access_token: response did not contain an access_token: ' . $x, LOGGER_DATA);
 920                 return false;
 921         }
 922 }
 923
 924 function fbpost_prepare_body(&$a,&$b) {
 925         if ($b["item"]["network"] != NETWORK_FACEBOOK)
 926                 return;
 927
 928         if ($b["preview"]) {
 929                 $msg = $b["item"]["body"];
 930
 931                 require_once("include/bbcode.php");
 932                 require_once("include/html2plain.php");
 933                 $msg = bb_CleanPictureLinks($msg);
 934                 $msg = bbcode($msg, false, false, 2, true);
 935                 $msg = trim(html2plain($msg, 0));
 936
 937                 $b['html'] = nl2br(htmlspecialchars($msg));
 938         }
 939 }
 940
 941 function fbpost_cron($a,$b) {
 942         $last = get_config('facebook','last_poll');
 943
 944         $poll_interval = intval(get_config('facebook','poll_interval'));
 945         if(! $poll_interval)
 946                 $poll_interval = FACEBOOK_DEFAULT_POLL_INTERVAL;
 947
 948         if($last) {
 949                 $next = $last + ($poll_interval * 60);
 950                 if($next > time()) {
 951                         logger('facebook: poll intervall not reached');
 952                         return;
 953                 }
 954         }
 955         logger('facebook: cron_start');
 956
 957         $r = q("SELECT * FROM `pconfig` WHERE `cat` = 'facebook' AND `k` = 'mirror_posts' AND `v` = '1' ORDER BY RAND() ");
 958         if(count($r)) {
 959                 foreach($r as $rr) {
 960                         logger('facebook: fetching for user '.$rr['uid']);
 961                         fbpost_fetchwall($a, $rr['uid']);
 962                 }
 963         }
 964
 965         logger('facebook: cron_end');
 966
 967         set_config('facebook','last_poll', time());
 968 }
 969
 970 function fbpost_fetchwall($a, $uid) {
 971         require_once("include/oembed.php");
 972         require_once('mod/item.php');
 973
 974         $access_token = get_pconfig($uid,'facebook','access_token');
 975         $post_to_page = get_pconfig($uid,'facebook','post_to_page');
 976         $lastcreated = get_pconfig($uid,'facebook','last_created');
 977
 978         if ((int)$post_to_page == 0)
 979                 $post_to_page = "me";
 980
 981         $url = "https://graph.facebook.com/".$post_to_page."/feed?access_token=".$access_token;
 982
 983         $first_time = ($lastcreated == "");
 984
 985         if ($lastcreated != "")
 986                 $url .= "&since=".urlencode($lastcreated);
 987
 988         $feed = fetch_url($url);
 989         $data = json_decode($feed);
 990
 991         if (!is_array($data->data))
 992                 return;
 993
 994         $items = array_reverse($data->data);
 995
 996         foreach ($items as $item) {
 997                 if ($item->created_time > $lastcreated)
 998                         $lastcreated = $item->created_time;
 999
1000                 if ($first_time)
1001                         continue;
1002
1003                 if ($item->application->id == get_config('facebook','appid'))
1004                         continue;
1005
1006                 if(isset($item->privacy) && ($item->privacy->value !== 'EVERYONE') && ($item->privacy->value !== ''))
1007                         continue;
1008
1009                 if (($post_to_page != $item->from->id) AND ((int)$post_to_page != 0))
1010                         continue;
1011
1012                 if (!strstr($item->id, $item->from->id."_") AND isset($item->to) AND ((int)$post_to_page == 0))
1013                         continue;
1014
1015                 $_SESSION["authenticated"] = true;
1016                 $_SESSION["uid"] = $uid;
1017
1018                 unset($_REQUEST);
1019                 $_REQUEST["type"] = "wall";
1020                 $_REQUEST["api_source"] = true;
1021                 $_REQUEST["profile_uid"] = $uid;
1022                 $_REQUEST["source"] = "Facebook";
1023
1024                 $_REQUEST["title"] = "";
1025
1026                 $_REQUEST["body"] = (isset($item->message) ? escape_tags($item->message) : '');
1027
1028                 $content = "";
1029                 $type = "";
1030
1031                 if(isset($item->name) and isset($item->link)) {
1032                         $oembed_data = oembed_fetch_url($item->link);
1033                         $type = $oembed_data->type;
1034                         $content = "[bookmark=".$item->link."]".$item->name."[/bookmark]";
1035
1036                         // If a link is not only attached but also added in the body, look if it can be removed in the body.
1037                         $removedlink = trim(str_replace($item->link, "", $_REQUEST["body"]));
1038
1039                         if (($removedlink == "") OR strstr($_REQUEST["body"], $removedlink))
1040                                 $_REQUEST["body"] = $removedlink;
1041
1042                 } elseif (isset($item->name))
1043                         $content .= "[b]".$item->name."[/b]";
1044
1045                 $quote = "";
1046                 if(isset($item->description) and ($item->type != "photo"))
1047                         $quote = $item->description;
1048
1049                 if(isset($item->caption) and ($item->type == "photo"))
1050                         $quote = $item->caption;
1051
1052                 // Only import the picture when the message is no video
1053                 // oembed display a picture of the video as well
1054                 //if ($item->type != "video") {
1055                 //if (($item->type != "video") and ($item->type != "photo")) {
1056                 if (($type == "") OR ($type == "link")) {
1057
1058                         $type = $item->type;
1059
1060                         if (isset($item->picture))
1061                                 $picture = $item->picture;
1062
1063                         if (($type == "photo") AND isset($item->object_id)) {
1064                                  logger('fbpost_fetchwall: fetching fbid '.$item->object_id, LOGGER_DEBUG);
1065                                 $url = "https://graph.facebook.com/".$item->object_id."?access_token=".$access_token;
1066                                 $feed = fetch_url($url);
1067                                 $data = json_decode($feed);
1068                                 if (isset($data->images)) {
1069                                         $picture = $data->images[0]->source;
1070                                         logger('fbpost_fetchwall: got fbid image '.$preview, LOGGER_DEBUG);
1071                                 }
1072                         }
1073
1074                         if(($picture != "") && isset($item->link))
1075                                 $content .= "\n".'[url='.$item->link.'][img]'.$picture.'[/img][/url]';
1076                         else {
1077                                 if ($picture != "")
1078                                         $content .= "\n".'[img]'.$picture.'[/img]';
1079                                 // if just a link, it may be a wall photo - check
1080                                 if(isset($item->link))
1081                                         $content .= fbpost_get_photo($uid,$item->link);
1082                         }
1083                 }
1084
1085                 if(trim($_REQUEST["body"].$content.$quote) == '') {
1086                         logger('facebook: empty body '.$item->id.' '.print_r($item, true));
1087                         continue;
1088                 }
1089
1090                 if ($content)
1091                         $_REQUEST["body"] .= "\n";
1092
1093                 if ($type)
1094                         $_REQUEST["body"] .= "[class=type-".$type."]";
1095
1096                 if ($content)
1097                         $_REQUEST["body"] .= trim($content);
1098
1099                 if ($quote)
1100                         $_REQUEST["body"] .= "\n[quote]".$quote."[/quote]";
1101
1102                 if ($type)
1103                         $_REQUEST["body"] .= "[/class]";
1104
1105                 $_REQUEST["body"] = trim($_REQUEST["body"]);
1106
1107                 if (isset($item->place)) {
1108                         if ($item->place->name or $item->place->location->street or
1109                                 $item->place->location->city or $item->place->location->country) {
1110                                 $_REQUEST["location"] = '';
1111                                 if ($item->place->name)
1112                                         $_REQUEST["location"] .= $item->place->name;
1113                                 if ($item->place->location->street)
1114                                         $_REQUEST["location"] .= " ".$item->place->location->street;
1115                                 if ($item->place->location->city)
1116                                         $_REQUEST["location"] .= " ".$item->place->location->city;
1117                                 if ($item->place->location->country)
1118                                         $_REQUEST["location"] .= " ".$item->place->location->country;
1119
1120                                 $_REQUEST["location"] = trim($_REQUEST["location"]);
1121                         }
1122                         if ($item->place->location->latitude and $item->place->location->longitude)
1123                                 $_REQUEST["coord"] = substr($item->place->location->latitude, 0, 8)
1124                                                 .' '.substr($item->place->location->longitude, 0, 8);
1125                 }
1126
1127                 //print_r($_REQUEST);
1128                 logger('facebook: posting for user '.$uid);
1129                 item_post($a);
1130         }
1131
1132         set_pconfig($uid,'facebook','last_created', $lastcreated);
1133 }
1134
1135 function fbpost_get_photo($uid,$link) {
1136         $access_token = get_pconfig($uid,'facebook','access_token');
1137         if(! $access_token || (! stristr($link,'facebook.com/photo.php')))
1138                 return "";
1139
1140         $ret = preg_match('/fbid=([0-9]*)/',$link,$match);
1141         if($ret)
1142                 $photo_id = $match[1];
1143         else
1144                 return "";
1145
1146         $x = fetch_url('https://graph.facebook.com/'.$photo_id.'?access_token='.$access_token);
1147         $j = json_decode($x);
1148         if($j->picture)
1149                 return "\n\n".'[url='.$link.'][img]'.$j->picture.'[/img][/url]';
1150
1151         return "";
1152 }
1153
1154 function fpost_cleanpicture($image) {
1155
1156         if ((strpos($image, ".fbcdn.net/") OR strpos($image, "/fbcdn-photos-")) and (substr($image, -6) == "_s.jpg"))
1157                 $image = substr($image, 0, -6)."_n.jpg";
1158
1159         $queryvar = fbpost_parse_query($image);
1160         if ($queryvar['url'] != "")
1161                 $image = urldecode($queryvar['url']);
1162
1163         return $image;
1164 }
1165
1166 function fbpost_parse_query($var) {
1167         /**
1168          *  Use this function to parse out the query array element from
1169          *  the output of parse_url().
1170         */
1171         $var  = parse_url($var, PHP_URL_QUERY);
1172         $var  = html_entity_decode($var);
1173         $var  = explode('&', $var);
1174         $arr  = array();
1175
1176         foreach($var as $val) {
1177                 $x          = explode('=', $val);
1178                 $arr[$x[0]] = $x[1];
1179         }
1180
1181         unset($val, $x, $var);
1182         return $arr;
1183 }