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 }
  38
  39
  40 function fbpost_uninstall() {
  41         unregister_hook('post_local',       'addon/fbpost/fbpost.php', 'fbpost_post_local');
  42         unregister_hook('notifier_normal',  'addon/fbpost/fbpost.php', 'fbpost_post_hook');
  43         unregister_hook('jot_networks',     'addon/fbpost/fbpost.php', 'fbpost_jot_nets');
  44         unregister_hook('connector_settings',  'addon/fbpost/fbpost.php', 'fbpost_plugin_settings');
  45         unregister_hook('enotify',          'addon/fbpost/fbpost.php', 'fbpost_enotify');
  46         unregister_hook('queue_predeliver', 'addon/fbpost/fbpost.php', 'fbpost_queue_hook');
  47         unregister_hook('cron',             'addon/fbpost/fbpost.php', 'fbpost_cron');
  48 }
  49
  50
  51 /* declare the fbpost_module function so that /fbpost url requests will land here */
  52
  53 function fbpost_module() {}
  54
  55
  56
  57 // If a->argv[1] is a nickname, this is a callback from Facebook oauth requests.
  58 // If $_REQUEST["realtime_cb"] is set, this is a callback from the Real-Time Updates API
  59
  60 /**
  61  * @param App $a
  62  */
  63 function fbpost_init(&$a) {
  64
  65         if($a->argc != 2)
  66                 return;
  67
  68         $nick = $a->argv[1];
  69
  70         if(strlen($nick))
  71                 $r = q("SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1",
  72                                 dbesc($nick)
  73                 );
  74         if(!(isset($r) && count($r)))
  75                 return;
  76
  77         $uid           = $r[0]['uid'];
  78         $auth_code     = (x($_GET, 'code') ? $_GET['code'] : '');
  79         $error         = (x($_GET, 'error_description') ? $_GET['error_description'] : '');
  80
  81
  82         if($error)
  83                 logger('fbpost_init: Error: ' . $error);
  84
  85         if($auth_code && $uid) {
  86
  87                 $appid = get_config('facebook','appid');
  88                 $appsecret = get_config('facebook', 'appsecret');
  89
  90                 $x = fetch_url('https://graph.facebook.com/oauth/access_token?client_id='
  91                         . $appid . '&client_secret=' . $appsecret . '&redirect_uri='
  92                         . urlencode($a->get_baseurl() . '/fbpost/' . $nick)
  93                         . '&code=' . $auth_code);
  94
  95                 logger('fbpost_init: returned access token: ' . $x, LOGGER_DATA);
  96
  97                 if(strpos($x,'access_token=') !== false) {
  98                         $token = str_replace('access_token=', '', $x);
  99                         if(strpos($token,'&') !== false)
 100                                 $token = substr($token,0,strpos($token,'&'));
 101                         set_pconfig($uid,'facebook','access_token',$token);
 102                         set_pconfig($uid,'facebook','post','1');
 103                         fbpost_get_self($uid);
 104                 }
 105
 106         }
 107
 108 }
 109
 110
 111 /**
 112  * @param int $uid
 113  */
 114 function fbpost_get_self($uid) {
 115         $access_token = get_pconfig($uid,'facebook','access_token');
 116         if(! $access_token)
 117                 return;
 118         $s = fetch_url('https://graph.facebook.com/me/?access_token=' . $access_token);
 119         if($s) {
 120                 $j = json_decode($s);
 121                 set_pconfig($uid,'facebook','self_id',(string) $j->id);
 122         }
 123 }
 124
 125
 126 // This is the POST method to the facebook settings page
 127 // Content is posted to Facebook in the function facebook_post_hook()
 128
 129 /**
 130  * @param App $a
 131  */
 132 function fbpost_post(&$a) {
 133
 134         $uid = local_user();
 135         if($uid){
 136
 137
 138                 $fb_limited = get_config('facebook','crestrict');
 139
 140
 141                 $value = ((x($_POST,'post_by_default')) ? intval($_POST['post_by_default']) : 0);
 142                 set_pconfig($uid,'facebook','post_by_default', $value);
 143
 144                 $value = ((x($_POST,'mirror_posts')) ? intval($_POST['mirror_posts']) : 0);
 145                 set_pconfig($uid,'facebook','mirror_posts', $value);
 146
 147                 $value = ((x($_POST,'suppress_view_on_friendica')) ? intval($_POST['suppress_view_on_friendica']) : 0);
 148                 set_pconfig($uid,'facebook','suppress_view_on_friendica', $value);
 149
 150                 $value = ((x($_POST,'post_to_page')) ? $_POST['post_to_page'] : "0-0");
 151                 $values = explode("-", $value);
 152                 set_pconfig($uid,'facebook','post_to_page', $values[0]);
 153                 set_pconfig($uid,'facebook','page_access_token', $values[1]);
 154
 155                 info( t('Settings updated.') . EOL);
 156         }
 157
 158         return;
 159 }
 160
 161 // Facebook settings form
 162
 163 /**
 164  * @param App $a
 165  * @return string
 166  */
 167 function fbpost_content(&$a) {
 168
 169         if(! local_user()) {
 170                 notice( t('Permission denied.') . EOL);
 171                 return '';
 172         }
 173
 174
 175         if(! service_class_allows(local_user(),'facebook_connect')) {
 176                 notice( t('Permission denied.') . EOL);
 177                 return upgrade_bool_message();
 178         }
 179
 180
 181         if($a->argc > 1 && $a->argv[1] === 'remove') {
 182                 del_pconfig(local_user(),'facebook','post');
 183                 info( t('Facebook Post disabled') . EOL);
 184         }
 185
 186         $o = '';
 187
 188         $fb_installed = false;
 189         if (get_pconfig(local_user(),'facebook','post')) {
 190                 $access_token = get_pconfig(local_user(),'facebook','access_token');
 191                 if ($access_token) {
 192                         $s = fetch_url('https://graph.facebook.com/me/feed?access_token=' . $access_token);
 193                         if($s) {
 194                                 $j = json_decode($s);
 195                                 if (isset($j->data)) $fb_installed = true;
 196                         }
 197                 }
 198         }
 199
 200         $appid = get_config('facebook','appid');
 201
 202         if(! $appid) {
 203                 notice( t('Facebook API key is missing.') . EOL);
 204                 return '';
 205         }
 206
 207         $a->page['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="'
 208                 . $a->get_baseurl() . '/addon/fbpost/fbpost.css' . '" media="all" />' . "\r\n";
 209
 210         $o .= '<h3>' . t('Facebook Post') . '</h3>';
 211
 212         if(! $fb_installed) {
 213                 $o .= '<div id="fbpost-enable-wrapper">';
 214
 215                 //read_stream,publish_stream,manage_pages,photo_upload,user_groups,offline_access
 216
 217                 $o .= '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $appid . '&redirect_uri='
 218                         . $a->get_baseurl() . '/fbpost/' . $a->user['nickname'] . '&scope=export_stream,read_stream,publish_stream,manage_pages,photo_upload,user_groups,publish_actions,user_friends,create_note,share_item,video_upload,status_update">' . t('Install Facebook Post connector for this account.') . '</a>';
 219                 $o .= '</div>';
 220         }
 221
 222         if($fb_installed) {
 223                 $o .= '<div id="fbpost-disable-wrapper">';
 224
 225                 $o .= '<a href="' . $a->get_baseurl() . '/fbpost/remove' . '">' . t('Remove Facebook Post connector') . '</a></div>';
 226
 227                 $o .= '<div id="fbpost-enable-wrapper">';
 228
 229                 $o .= '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $appid . '&redirect_uri='
 230                         . $a->get_baseurl() . '/fbpost/' . $a->user['nickname'] . '&scope=export_stream,read_stream,publish_stream,manage_pages,photo_upload,user_groups,publish_actions,user_friends,create_note,share_item,video_upload,status_update">' . t('Re-authenticate [This is necessary whenever your Facebook password is changed.]') . '</a>';
 231                 $o .= '</div>';
 232
 233                 $o .= '<div id="fbpost-post-default-form">';
 234                 $o .= '<form action="fbpost" method="post" >';
 235                 $post_by_default = get_pconfig(local_user(),'facebook','post_by_default');
 236                 $checked = (($post_by_default) ? ' checked="checked" ' : '');
 237                 $o .= '<input type="checkbox" name="post_by_default" value="1"' . $checked . '/>' . ' ' . t('Post to Facebook by default') . EOL;
 238
 239                 $suppress_view_on_friendica = get_pconfig(local_user(),'facebook','suppress_view_on_friendica');
 240                 $checked = (($suppress_view_on_friendica) ? ' checked="checked" ' : '');
 241                 $o .= '<input type="checkbox" name="suppress_view_on_friendica" value="1"' . $checked . '/>' . ' ' . t('Suppress "View on friendica"') . EOL;
 242
 243                 $mirror_posts = get_pconfig(local_user(),'facebook','mirror_posts');
 244                 $checked = (($mirror_posts) ? ' checked="checked" ' : '');
 245                 $o .= '<input type="checkbox" name="mirror_posts" value="1"' . $checked . '/>' . ' ' . t('Mirror wall posts from facebook to friendica.') . EOL;
 246
 247                 // List all pages
 248                 $post_to_page = get_pconfig(local_user(),'facebook','post_to_page');
 249                 $page_access_token = get_pconfig(local_user(),'facebook','page_access_token');
 250                 $fb_token  = get_pconfig($a->user['uid'],'facebook','access_token');
 251                 $url = 'https://graph.facebook.com/me/accounts';
 252                 $x = fetch_url($url."?access_token=".$fb_token);
 253                 $accounts = json_decode($x);
 254
 255                 $o .= t("Post to page/group:")."<select name='post_to_page'>";
 256                 if (intval($post_to_page) == 0)
 257                         $o .= "<option value='0-0' selected>".t('None')."</option>";
 258                 else
 259                         $o .= "<option value='0-0'>".t('None')."</option>";
 260
 261                 foreach($accounts->data as $account) {
 262                         if (is_array($account->perms))
 263                                 if ($post_to_page == $account->id)
 264                                         $o .= "<option value='".$account->id."-".$account->access_token."' selected>".$account->name."</option>";
 265                                 else
 266                                         $o .= "<option value='".$account->id."-".$account->access_token."'>".$account->name."</option>";
 267                 }
 268
 269                 $url = 'https://graph.facebook.com/me/groups';
 270                 $x = fetch_url($url."?access_token=".$fb_token);
 271                 $groups = json_decode($x);
 272
 273                 foreach($groups->data as $group) {
 274                         if ($post_to_page == $group->id)
 275                                 $o .= "<option value='".$group->id."-0' selected>".$group->name."</option>";
 276                         else
 277                                 $o .= "<option value='".$group->id."-0'>".$group->name."</option>";
 278                 }
 279
 280                 $o .= "</select>";
 281
 282                 $o .= '<p><input type="submit" name="submit" value="' . t('Save Settings') . '" /></form></div>';
 283
 284         }
 285
 286         return $o;
 287 }
 288
 289 /**
 290  * @param App $a
 291  * @param null|object $b
 292  */
 293 function fbpost_plugin_settings(&$a,&$b) {
 294
 295         $b .= '<div class="settings-block">';
 296         //$b .= '<h3>' . t('Facebook Post Settings') . '</h3>';
 297         $b .= '<a href="fbpost"><h3>' . t('Facebook Post Settings') . '</a></h3>';
 298         $b .= '</div>';
 299
 300 }
 301
 302
 303 /**
 304  * @param App $a
 305  * @param null|object $o
 306  */
 307 function fbpost_plugin_admin(&$a, &$o){
 308
 309
 310         $o = '<input type="hidden" name="form_security_token" value="' . get_form_security_token("fbsave") . '">';
 311
 312         $o .= '<h4>' . t('Facebook API Key') . '</h4>';
 313
 314         $appid  = get_config('facebook', 'appid'  );
 315         $appsecret = get_config('facebook', 'appsecret' );
 316
 317         $ret1 = q("SELECT `v` FROM `config` WHERE `cat` = 'facebook' AND `k` = 'appid' LIMIT 1");
 318         $ret2 = q("SELECT `v` FROM `config` WHERE `cat` = 'facebook' AND `k` = 'appsecret' LIMIT 1");
 319         if ((count($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>');
 320
 321         $o .= '<label for="fb_appid">' . t('App-ID / API-Key') . '</label><input id="fb_appid" name="appid" type="text" value="' . escape_tags($appid ? $appid : "") . '"><br style="clear: both;">';
 322         $o .= '<label for="fb_appsecret">' . t('Application secret') . '</label><input id="fb_appsecret" name="appsecret" type="text" value="' . escape_tags($appsecret ? $appsecret : "") . '"><br style="clear: both;">';
 323
 324         $o .= '<input type="submit" name="fb_save_keys" value="' . t('Save') . '">';
 325
 326 }
 327
 328 /**
 329  * @param App $a
 330  */
 331
 332 function fbpost_plugin_admin_post(&$a){
 333         check_form_security_token_redirectOnErr('/admin/plugins/fbpost', 'fbsave');
 334
 335         if (x($_REQUEST,'fb_save_keys')) {
 336                 set_config('facebook', 'appid', $_REQUEST['appid']);
 337                 set_config('facebook', 'appsecret', $_REQUEST['appsecret']);
 338
 339                 info(t('The new values have been saved.'));
 340         }
 341
 342 }
 343
 344 /**
 345  * @param App $a
 346  * @param object $b
 347  * @return mixed
 348  */
 349 function fbpost_jot_nets(&$a,&$b) {
 350         if(! local_user())
 351                 return;
 352
 353         $fb_post = get_pconfig(local_user(),'facebook','post');
 354         if(intval($fb_post) == 1) {
 355                 $fb_defpost = get_pconfig(local_user(),'facebook','post_by_default');
 356                 $selected = ((intval($fb_defpost) == 1) ? ' checked="checked" ' : '');
 357                 $b .= '<div class="profile-jot-net"><input type="checkbox" name="facebook_enable"' . $selected . ' value="1" /> '
 358                         . t('Post to Facebook') . '</div>';
 359         }
 360 }
 361
 362 function fbpost_createmsg($b) {
 363         require_once("include/bbcode.php");
 364         require_once("include/html2plain.php");
 365
 366         // Looking for the first image
 367         $image = '';
 368         if(preg_match("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/is",$b['body'],$matches))
 369                 $image = $matches[3];
 370
 371         if ($image == '')
 372                 if(preg_match("/\[img\](.*?)\[\/img\]/is",$b['body'],$matches))
 373                         $image = $matches[1];
 374
 375         $multipleimages = (strpos($b['body'], "[img") != strrpos($b['body'], "[img"));
 376
 377         // When saved into the database the content is sent through htmlspecialchars
 378         // That means that we have to decode all image-urls
 379         $image = htmlspecialchars_decode($image);
 380
 381         $body = $b["body"];
 382         if ($b["title"] != "")
 383                 $body = $b["title"]."\n\n".$body;
 384
 385         if (strpos($body, "[bookmark") !== false) {
 386                 // splitting the text in two parts:
 387                 // before and after the bookmark
 388                 $pos = strpos($body, "[bookmark");
 389                 $body1 = substr($body, 0, $pos);
 390                 $body2 = substr($body, $pos);
 391
 392                 // Removing all quotes after the bookmark
 393                 // they are mostly only the content after the bookmark.
 394                 $body2 = preg_replace("/\[quote\=([^\]]*)\](.*?)\[\/quote\]/ism",'',$body2);
 395                 $body2 = preg_replace("/\[quote\](.*?)\[\/quote\]/ism",'',$body2);
 396
 397                 $pos2 = strpos($body2, "[/bookmark]");
 398                 if ($pos2)
 399                         $body2 = substr($body2, $pos2 + 11);
 400
 401                 $body = $body1.$body2;
 402         }
 403
 404         // Add some newlines so that the message could be cut better
 405         $body = str_replace(array("[quote", "[bookmark", "[/bookmark]", "[/quote]"),
 406                                 array("\n[quote", "\n[bookmark", "[/bookmark]\n", "[/quote]\n"), $body);
 407
 408         // remove the recycle signs and the names since they aren't helpful on twitter
 409         // $recycle = html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
 410         // $body = preg_replace( '/'.$recycle.'\[url\=(\w+.*?)\](\w+.*?)\[\/url\]/i', "\n", $body);
 411
 412         // At first convert the text to html
 413         $html = bbcode($body, false, false, 2);
 414
 415         // Then convert it to plain text
 416         //$msg = trim($b['title']." \n\n".html2plain($html, 0, true));
 417         $msg = trim(html2plain($html, 0, true));
 418         $msg = html_entity_decode($msg,ENT_QUOTES,'UTF-8');
 419
 420         // Removing multiple newlines
 421         while (strpos($msg, "\n\n\n") !== false)
 422                 $msg = str_replace("\n\n\n", "\n\n", $msg);
 423
 424         // Removing multiple spaces
 425         while (strpos($msg, "  ") !== false)
 426                 $msg = str_replace("  ", " ", $msg);
 427
 428         // Removing URLs
 429         $msg = preg_replace('/(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/i', "", $msg);
 430
 431         $msg = trim($msg);
 432
 433         $link = '';
 434         $linkname = '';
 435         // look for bookmark-bbcode and handle it with priority
 436         if(preg_match("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/is",$b['body'],$matches)) {
 437                 $link = $matches[1];
 438                 $linkname = $matches[2];
 439         }
 440
 441         $multiplelinks = (strpos($b['body'], "[bookmark") != strrpos($b['body'], "[bookmark"));
 442
 443         if ($multiplelinks)
 444                 $linkname = '';
 445
 446         // If there is no bookmark element then take the first link
 447         if ($link == '') {
 448                 $links = collecturls($html);
 449                 if (sizeof($links) > 0) {
 450                         reset($links);
 451                         $link = current($links);
 452                 }
 453                 $multiplelinks = (sizeof($links) > 1);
 454         }
 455
 456         $msglink = "";
 457         if ($multiplelinks)
 458                 $msglink = $b["plink"];
 459         else if ($link != "")
 460                 $msglink = $link;
 461         else if ($multipleimages)
 462                 $msglink = $b["plink"];
 463         else if ($image != "")
 464                 $msglink = $image;
 465
 466         // Removing multiple spaces - again
 467         while (strpos($msg, "  ") !== false)
 468                 $msg = str_replace("  ", " ", $msg);
 469
 470         if ($msglink != "") {
 471                 // Looking if the link points to an image
 472                 $img_str = fetch_url($msglink);
 473
 474                 $tempfile = tempnam(get_config("system","temppath"), "cache");
 475                 file_put_contents($tempfile, $img_str);
 476                 $mime = image_type_to_mime_type(exif_imagetype($tempfile));
 477                 unlink($tempfile);
 478         } else
 479                 $mime = "";
 480
 481         if (($image == $msglink) OR (substr($mime, 0, 6) == "image/"))
 482                 return(array("msg"=>trim($msg), "link"=>"", "linkname"=>$linkname, "image"=>$msglink));
 483         else
 484                 return(array("msg"=>trim($msg), "link"=>$msglink, "linkname"=>$linkname,"image"=>$image));
 485 }
 486
 487 /**
 488  * @param App $a
 489  * @param object $b
 490  * @return mixed
 491  */
 492 function fbpost_post_hook(&$a,&$b) {
 493
 494         logger('fbpost_post_hook: Facebook post invoked', LOGGER_DEBUG);
 495
 496         if($b['deleted'] || ($b['created'] !== $b['edited']))
 497                 return;
 498
 499         logger('fbpost_post_hook: Facebook post first check successful', LOGGER_DEBUG);
 500
 501         // if post comes from facebook don't send it back
 502         if(($b['app'] == "Facebook") AND ($b['verb'] != ACTIVITY_LIKE))
 503                 return;
 504
 505         logger('fbpost_post_hook: Facebook post accepted', LOGGER_DEBUG);
 506
 507         /**
 508          * Post to Facebook stream
 509          */
 510
 511         require_once('include/group.php');
 512         require_once('include/html2plain.php');
 513
 514
 515         $reply = false;
 516         $likes = false;
 517
 518         $deny_arr = array();
 519         $allow_arr = array();
 520
 521         $toplevel = (($b['id'] == $b['parent']) ? true : false);
 522
 523
 524         $linking = ((get_pconfig($b['uid'],'facebook','no_linking')) ? 0 : 1);
 525
 526         if((!$toplevel) && ($linking)) {
 527                 $r = q("SELECT * FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
 528                         intval($b['parent']),
 529                         intval($b['uid'])
 530                 );
 531                 //$r = q("SELECT * FROM `item` WHERE `uri` = '%s' AND `uid` = %d LIMIT 1",
 532                 //      dbesc($b['parent-uri']),
 533                 //      intval($b['uid'])
 534                 //);
 535
 536                 // is it a reply to a facebook post?
 537                 // A reply to a toplevel post is only allowed for "real" facebook posts
 538                 if(count($r) && substr($r[0]['uri'],0,4) === 'fb::')
 539                         $reply = substr($r[0]['uri'],4);
 540                 elseif(count($r) && (substr($r[0]['extid'],0,4) === 'fb::') AND ($r[0]['id'] != $r[0]['parent']))
 541                         $reply = substr($r[0]['extid'],4);
 542                 else
 543                         return;
 544
 545                 $u = q("SELECT * FROM user where uid = %d limit 1",
 546                         intval($b['uid'])
 547                 );
 548                 if(! count($u))
 549                         return;
 550
 551                 // only accept comments from the item owner. Other contacts are unknown to FB.
 552
 553                 if(! link_compare($b['author-link'], $a->get_baseurl() . '/profile/' . $u[0]['nickname']))
 554                         return;
 555
 556
 557                 logger('fbpost_post_hook: facebook reply id=' . $reply);
 558         }
 559
 560         if(strstr($b['postopts'],'facebook') || ($b['private']) || ($reply)) {
 561
 562                 if($b['private'] && $reply === false) {
 563                         $allow_people = expand_acl($b['allow_cid']);
 564                         $allow_groups = expand_groups(expand_acl($b['allow_gid']));
 565                         $deny_people  = expand_acl($b['deny_cid']);
 566                         $deny_groups  = expand_groups(expand_acl($b['deny_gid']));
 567
 568                         $recipients = array_unique(array_merge($allow_people,$allow_groups));
 569                         $deny = array_unique(array_merge($deny_people,$deny_groups));
 570
 571                         $allow_str = dbesc(implode(', ',$recipients));
 572                         if($allow_str) {
 573                                 $r = q("SELECT `notify` FROM `contact` WHERE `id` IN ( $allow_str ) AND `network` = 'face'");
 574                                 if(count($r))
 575                                         foreach($r as $rr)
 576                                                 $allow_arr[] = $rr['notify'];
 577                         }
 578
 579                         $deny_str = dbesc(implode(', ',$deny));
 580                         if($deny_str) {
 581                                 $r = q("SELECT `notify` FROM `contact` WHERE `id` IN ( $deny_str ) AND `network` = 'face'");
 582                                 if(count($r))
 583                                         foreach($r as $rr)
 584                                                 $deny_arr[] = $rr['notify'];
 585                         }
 586
 587                         if(count($deny_arr) && (! count($allow_arr))) {
 588
 589                                 // One or more FB folks were denied access but nobody on FB was specifically allowed access.
 590                                 // This might cause the post to be open to public on Facebook, but only to selected members
 591                                 // on another network. Since this could potentially leak a post to somebody who was denied,
 592                                 // we will skip posting it to Facebook with a slightly vague but relevant message that will
 593                                 // hopefully lead somebody to this code comment for a better explanation of what went wrong.
 594
 595                                 notice( t('Post to Facebook cancelled because of multi-network access permission conflict.') . EOL);
 596                                 return;
 597                         }
 598
 599
 600                         // if it's a private message but no Facebook members are allowed or denied, skip Facebook post
 601
 602                         if((! count($allow_arr)) && (! count($deny_arr)))
 603                                 return;
 604                 }
 605
 606                 if($b['verb'] == ACTIVITY_LIKE) {
 607                         $likes = true;
 608                         logger('fbpost_post_hook: liking '.print_r($b, true), LOGGER_DEBUG);
 609                 }
 610
 611
 612                 $appid  = get_config('facebook', 'appid'  );
 613                 $secret = get_config('facebook', 'appsecret' );
 614
 615                 if($appid && $secret) {
 616
 617                         logger('fbpost_post_hook: have appid+secret');
 618
 619                         $fb_token  = get_pconfig($b['uid'],'facebook','access_token');
 620
 621
 622                         // post to facebook if it's a public post and we've ticked the 'post to Facebook' box,
 623                         // or it's a private message with facebook participants
 624                         // or it's a reply or likes action to an existing facebook post
 625
 626                         if($fb_token && ($toplevel || $b['private'] || $reply)) {
 627                                 logger('fbpost_post_hook: able to post');
 628                                 require_once('library/facebook.php');
 629                                 require_once('include/bbcode.php');
 630
 631                                 $msg = $b['body'];
 632
 633                                 logger('fbpost_post_hook: original msg=' . $msg, LOGGER_DATA);
 634
 635                                 $msgarr = fbpost_createmsg($b);
 636                                 $msg = $msgarr["msg"];
 637                                 $link = $msgarr["link"];
 638                                 $image = $msgarr["image"];
 639                                 $linkname = $msgarr["linkname"];
 640
 641                                 // Fallback - if message is empty
 642                                 if(!strlen($msg))
 643                                         $msg = $linkname;
 644
 645                                 if(!strlen($msg))
 646                                         $msg = $link;
 647
 648                                 if(!strlen($msg))
 649                                         $msg = $image;
 650
 651                                 // If there is nothing to post then exit
 652                                 if(!strlen($msg))
 653                                         return;
 654
 655                                 logger('fbpost_post_hook: msg=' . $msg, LOGGER_DATA);
 656
 657                                 $video = "";
 658
 659                                 if($likes) {
 660                                         $postvars = array('access_token' => $fb_token);
 661                                 } else {
 662                                         // message, picture, link, name, caption, description, source, place, tags
 663                                         //if(trim($link) != "")
 664                                         //      if (@exif_imagetype($link) != 0) {
 665                                         //              $image = $link;
 666                                         //              $link = "";
 667                                         //      }
 668
 669                                         $postvars = array(
 670                                                 'access_token' => $fb_token,
 671                                                 'message' => $msg
 672                                         );
 673                                         if(trim($image) != "")
 674                                                 $postvars['picture'] = $image;
 675
 676                                         if(trim($link) != "") {
 677                                                 $postvars['link'] = $link;
 678
 679                                                 if ((stristr($link,'youtube')) || (stristr($link,'youtu.be')) || (stristr($link,'vimeo'))) {
 680                                                         $video = $link;
 681                                                 }
 682                                         }
 683                                         if(trim($linkname) != "")
 684                                                 $postvars['name'] = $linkname;
 685                                 }
 686
 687                                 if(($b['private']) && ($toplevel)) {
 688                                         $postvars['privacy'] = '{"value": "CUSTOM", "friends": "SOME_FRIENDS"';
 689                                         if(count($allow_arr))
 690                                                 $postvars['privacy'] .= ',"allow": "' . implode(',',$allow_arr) . '"';
 691                                         if(count($deny_arr))
 692                                                 $postvars['privacy'] .= ',"deny": "' . implode(',',$deny_arr) . '"';
 693                                         $postvars['privacy'] .= '}';
 694
 695                                 }
 696
 697                                 $post_to_page = get_pconfig($b['uid'],'facebook','post_to_page');
 698                                 $page_access_token = get_pconfig($b['uid'],'facebook','page_access_token');
 699                                 if ((intval($post_to_page) != 0) and ($page_access_token != ""))
 700                                         $target = $post_to_page;
 701                                 else
 702                                         $target = "me";
 703
 704                                 if($reply) {
 705                                         $url = 'https://graph.facebook.com/' . $reply . '/' . (($likes) ? 'likes' : 'comments');
 706                                 } else if (($video != "") or (($image == "") and ($link != ""))) {
 707                                         // If it is a link to a video or a link without a preview picture then post it as a link
 708                                         if ($video != "")
 709                                                 $link = $video;
 710
 711                                         $postvars = array(
 712                                                 'access_token' => $fb_token,
 713                                                 'link' => $link,
 714                                         );
 715                                         if ($msg != $video)
 716                                                 $postvars['message'] = $msg;
 717
 718                                         $url = 'https://graph.facebook.com/'.$target.'/links';
 719                                 } else if (($link == "") and ($image != "")) {
 720                                         // If it is only an image without a page link then post this image as a photo
 721                                         $postvars = array(
 722                                                 'access_token' => $fb_token,
 723                                                 'url' => $image,
 724                                         );
 725                                         if ($msg != $image)
 726                                                 $postvars['message'] = $msg;
 727
 728                                         $url = 'https://graph.facebook.com/'.$target.'/photos';
 729                                 } else if (($link != "") or ($image != "") or ($b['title'] == '') or (strlen($msg) < 500)) {
 730                                         $url = 'https://graph.facebook.com/'.$target.'/feed';
 731                                         if (!get_pconfig($b['uid'],'facebook','suppress_view_on_friendica') and $b['plink'])
 732                                                 $postvars['actions'] = '{"name": "' . t('View on Friendica') . '", "link": "' .  $b['plink'] . '"}';
 733                                 } else {
 734                                         // if its only a message and a subject and the message is larger than 500 characters then post it as note
 735                                         $postvars = array(
 736                                                 'access_token' => $fb_token,
 737                                                 'message' => bbcode($b['body'], false, false),
 738                                                 'subject' => $b['title'],
 739                                         );
 740                                         $url = 'https://graph.facebook.com/'.$target.'/notes';
 741                                 }
 742
 743                                 // Post to page?
 744                                 if (!$reply and ($target != "me") and $page_access_token)
 745                                         $postvars['access_token'] = $page_access_token;
 746
 747                                 logger('fbpost_post_hook: post to ' . $url);
 748                                 logger('fbpost_post_hook: postvars: ' . print_r($postvars,true));
 749
 750                                 // "test_mode" prevents anything from actually being posted.
 751                                 // Otherwise, let's do it.
 752
 753                                 if(!get_config('facebook','test_mode')) {
 754                                         $x = post_url($url, $postvars);
 755                                         logger('fbpost_post_hook: post returns: ' . $x, LOGGER_DEBUG);
 756
 757                                         $retj = json_decode($x);
 758                                         if($retj->id) {
 759                                                 // Only set the extid when it isn't the toplevel post
 760                                                 q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d AND `parent` != %d",
 761                                                         dbesc('fb::' . $retj->id),
 762                                                         intval($b['id']),
 763                                                         intval($b['id'])
 764                                                 );
 765                                         }
 766                                         else {
 767                                                 // Only add to queue if its a toplevel post.
 768                                                 // Sometimes posts are accepted from facebook although it telling an error
 769                                                 // This leads to endless comment flooding.
 770                                                 if(! $likes AND $toplevel) {
 771                                                         $r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `self`", intval($b['uid']));
 772                                                         if (count($r))
 773                                                                 $a->contact = $r[0]["id"];
 774
 775                                                         $s = serialize(array('url' => $url, 'item' => $b['id'], 'post' => $postvars));
 776                                                         require_once('include/queue_fn.php');
 777                                                         add_to_queue($a->contact,NETWORK_FACEBOOK,$s);
 778                                                         logger('fbpost_post_hook: Post failed, requeued.', LOGGER_DEBUG);
 779                                                         notice( t('Facebook post failed. Queued for retry.') . EOL);
 780                                                 }
 781
 782                                                 if (isset($retj->error) && $retj->error->type == "OAuthException" && $retj->error->code == 190) {
 783                                                         logger('fbpost_post_hook: Facebook session has expired due to changed password.', LOGGER_DEBUG);
 784
 785                                                         $last_notification = get_pconfig($b['uid'], 'facebook', 'session_expired_mailsent');
 786                                                         if (!$last_notification || $last_notification < (time() - FACEBOOK_SESSION_ERR_NOTIFICATION_INTERVAL)) {
 787                                                                 require_once('include/enotify.php');
 788
 789                                                                 $r = q("SELECT * FROM `user` WHERE `uid` = %d LIMIT 1", intval($b['uid']));
 790                                                                 notification(array(
 791                                                                         'uid' => $b['uid'],
 792                                                                         'type' => NOTIFY_SYSTEM,
 793                                                                         'system_type' => 'facebook_connection_invalid',
 794                                                                         'language'     => $r[0]['language'],
 795                                                                         'to_name'      => $r[0]['username'],
 796                                                                         'to_email'     => $r[0]['email'],
 797                                                                         'source_name'  => t('Administrator'),
 798                                                                         'source_link'  => $a->config["system"]["url"],
 799                                                                         'source_photo' => $a->config["system"]["url"] . '/images/person-80.jpg',
 800                                                                 ));
 801
 802                                                                 set_pconfig($b['uid'], 'facebook', 'session_expired_mailsent', time());
 803                                                         } else logger('fbpost_post_hook: No notification, as the last one was sent on ' . $last_notification, LOGGER_DEBUG);
 804                                                 }
 805                                         }
 806                                 }
 807                         }
 808                 }
 809         }
 810 }
 811
 812 /**
 813  * @param App $app
 814  * @param object $data
 815  */
 816 function fbpost_enotify(&$app, &$data) {
 817         if (x($data, 'params') && $data['params']['type'] == NOTIFY_SYSTEM && x($data['params'], 'system_type') && $data['params']['system_type'] == 'facebook_connection_invalid') {
 818                 $data['itemlink'] = '/fbpost';
 819                 $data['epreamble'] = $data['preamble'] = t('Your Facebook connection became invalid. Please Re-authenticate.');
 820                 $data['subject'] = t('Facebook connection became invalid');
 821                 $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]");
 822         }
 823 }
 824
 825 /**
 826  * @param App $a
 827  * @param object $b
 828  */
 829 function fbpost_post_local(&$a,&$b) {
 830
 831         // Figure out if Facebook posting is enabled for this post and file it in 'postopts'
 832         // where we will discover it during background delivery.
 833
 834         // This can only be triggered by a local user posting to their own wall.
 835
 836         if((local_user()) && (local_user() == $b['uid'])) {
 837
 838                 $fb_post   = intval(get_pconfig(local_user(),'facebook','post'));
 839                 $fb_enable = (($fb_post && x($_REQUEST,'facebook_enable')) ? intval($_REQUEST['facebook_enable']) : 0);
 840
 841                 // if API is used, default to the chosen settings
 842                 // but allow a specific override
 843
 844                 if($_REQUEST['api_source'] && intval(get_pconfig(local_user(),'facebook','post_by_default'))) {
 845                         if(! x($_REQUEST,'facebook_enable'))
 846                                 $fb_enable = 1;
 847                 }
 848
 849                 if(! $fb_enable)
 850                         return;
 851
 852                 if(strlen($b['postopts']))
 853                         $b['postopts'] .= ',';
 854                 $b['postopts'] .= 'facebook';
 855         }
 856 }
 857
 858
 859 /**
 860  * @param App $a
 861  * @param object $b
 862  */
 863 function fbpost_queue_hook(&$a,&$b) {
 864
 865         $qi = q("SELECT * FROM `queue` WHERE `network` = '%s'",
 866                 dbesc(NETWORK_FACEBOOK)
 867         );
 868         if(! count($qi))
 869                 return;
 870
 871         require_once('include/queue_fn.php');
 872
 873         foreach($qi as $x) {
 874                 if($x['network'] !== NETWORK_FACEBOOK)
 875                         continue;
 876
 877                 logger('fbpost_queue_hook: run');
 878
 879                 $r = q("SELECT `user`.* FROM `user` LEFT JOIN `contact` on `contact`.`uid` = `user`.`uid`
 880                         WHERE `contact`.`self` = 1 AND `contact`.`id` = %d LIMIT 1",
 881                         intval($x['cid'])
 882                 );
 883                 if(! count($r)) {
 884                         logger('fbpost_queue_hook: no user found for entry '.print_r($x, true));
 885                         update_queue_time($x['id']);
 886                         continue;
 887                 }
 888
 889                 $user = $r[0];
 890
 891                 $appid  = get_config('facebook', 'appid'  );
 892                 $secret = get_config('facebook', 'appsecret' );
 893
 894                 if($appid && $secret) {
 895                         $fb_post   = intval(get_pconfig($user['uid'],'facebook','post'));
 896                         $fb_token  = get_pconfig($user['uid'],'facebook','access_token');
 897
 898                         if($fb_post && $fb_token) {
 899                                 logger('fbpost_queue_hook: able to post');
 900                                 require_once('library/facebook.php');
 901
 902                                 $z = unserialize($x['content']);
 903                                 $item = $z['item'];
 904                                 $j = post_url($z['url'],$z['post']);
 905
 906                                 $retj = json_decode($j);
 907                                 if($retj->id) {
 908                                         // Only set the extid when it isn't the toplevel post
 909                                         q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d AND `parent` != %d",
 910                                                 dbesc('fb::' . $retj->id),
 911                                                 intval($item),
 912                                                 intval($item)
 913                                         );
 914                                         logger('fbpost_queue_hook: success: ' . $j);
 915                                         remove_queue_item($x['id']);
 916                                 }
 917                                 else {
 918                                         logger('fbpost_queue_hook: failed: ' . $j);
 919                                         update_queue_time($x['id']);
 920                                 }
 921                         } else {
 922                                 logger('fbpost_queue_hook: No fb_post or fb_token.');
 923                                 update_queue_time($x['id']);
 924                         }
 925                 } else {
 926                         logger('fbpost_queue_hook: No appid or secret.');
 927                         update_queue_time($x['id']);
 928                 }
 929         }
 930 }
 931
 932
 933 /**
 934  * @return bool|string
 935  */
 936 function fbpost_get_app_access_token() {
 937
 938         $acc_token = get_config('facebook','app_access_token');
 939
 940         if ($acc_token !== false) return $acc_token;
 941
 942         $appid = get_config('facebook','appid');
 943         $appsecret = get_config('facebook', 'appsecret');
 944
 945         if ($appid === false || $appsecret === false) {
 946                 logger('fb_get_app_access_token: appid and/or appsecret not set', LOGGER_DEBUG);
 947                 return false;
 948         }
 949         logger('https://graph.facebook.com/oauth/access_token?client_id=' . $appid . '&client_secret=' . $appsecret . '&grant_type=client_credentials', LOGGER_DATA);
 950         $x = fetch_url('https://graph.facebook.com/oauth/access_token?client_id=' . $appid . '&client_secret=' . $appsecret . '&grant_type=client_credentials');
 951
 952         if(strpos($x,'access_token=') !== false) {
 953                 logger('fb_get_app_access_token: returned access token: ' . $x, LOGGER_DATA);
 954
 955                 $token = str_replace('access_token=', '', $x);
 956                 if(strpos($token,'&') !== false)
 957                         $token = substr($token,0,strpos($token,'&'));
 958
 959                 if ($token == "") {
 960                         logger('fb_get_app_access_token: empty token: ' . $x, LOGGER_DEBUG);
 961                         return false;
 962                 }
 963                 set_config('facebook','app_access_token',$token);
 964                 return $token;
 965         } else {
 966                 logger('fb_get_app_access_token: response did not contain an access_token: ' . $x, LOGGER_DATA);
 967                 return false;
 968         }
 969 }
 970
 971 function fbpost_cron($a,$b) {
 972         $last = get_config('facebook','last_poll');
 973
 974         $poll_interval = intval(get_config('facebook','poll_interval'));
 975         if(! $poll_interval)
 976                 $poll_interval = FACEBOOK_DEFAULT_POLL_INTERVAL;
 977
 978         if($last) {
 979                 $next = $last + ($poll_interval * 60);
 980                 if($next > time()) {
 981                         logger('facebook: poll intervall not reached');
 982                         return;
 983                 }
 984         }
 985         logger('facebook: cron_start');
 986
 987         $r = q("SELECT * FROM `pconfig` WHERE `cat` = 'facebook' AND `k` = 'mirror_posts' AND `v` = '1' ORDER BY RAND() ");
 988         if(count($r)) {
 989                 foreach($r as $rr) {
 990                         logger('facebook: fetching for user '.$rr['uid']);
 991                         fbpost_fetchwall($a, $rr['uid']);
 992                 }
 993         }
 994
 995         logger('facebook: cron_end');
 996
 997         set_config('facebook','last_poll', time());
 998 }
 999
1000 function fbpost_fetchwall($a, $uid) {
1001         require_once("include/oembed.php");
1002
1003         $access_token = get_pconfig($uid,'facebook','access_token');
1004         $post_to_page = get_pconfig($uid,'facebook','post_to_page');
1005         $lastcreated = get_pconfig($uid,'facebook','last_created');
1006
1007         if ((int)$post_to_page == 0)
1008                 $post_to_page = "me";
1009
1010         $url = "https://graph.facebook.com/".$post_to_page."/feed?access_token=".$access_token;
1011
1012         $first_time = ($lastcreated == "");
1013
1014         if ($lastcreated != "")
1015                 $url .= "&since=".urlencode($lastcreated);
1016
1017         $feed = fetch_url($url);
1018         $data = json_decode($feed);
1019
1020         if (!is_array($data->data))
1021                 return;
1022
1023         $items = array_reverse($data->data);
1024
1025         foreach ($items as $item) {
1026                 if ($item->created_time > $lastcreated)
1027                         $lastcreated = $item->created_time;
1028
1029                 if ($first_time)
1030                         continue;
1031
1032                 if ($item->application->id == get_config('facebook','appid'))
1033                         continue;
1034
1035                 if(isset($item->privacy) && ($item->privacy->value !== 'EVERYONE') && ($item->privacy->value !== ''))
1036                         continue;
1037
1038                 if (($post_to_page != $item->from->id) AND ((int)$post_to_page != 0))
1039                         continue;
1040
1041                 if (!strstr($item->id, $item->from->id."_") AND isset($item->to) AND ((int)$post_to_page == 0))
1042                         continue;
1043
1044                 $_SESSION["authenticated"] = true;
1045                 $_SESSION["uid"] = $uid;
1046
1047                 unset($_REQUEST);
1048                 $_REQUEST["type"] = "wall";
1049                 $_REQUEST["api_source"] = true;
1050                 $_REQUEST["profile_uid"] = $uid;
1051                 $_REQUEST["source"] = "Facebook";
1052
1053                 $_REQUEST["title"] = "";
1054
1055                 $_REQUEST["body"] = (isset($item->message) ? escape_tags($item->message) : '');
1056
1057                 $content = "";
1058                 $type = "";
1059
1060                 if(isset($item->name) and isset($item->link)) {
1061                         $oembed_data = oembed_fetch_url($item->link);
1062                         $type = $oembed_data->type;
1063                         $content = "[bookmark=".$item->link."]".$item->name."[/bookmark]";
1064                 } elseif (isset($item->name))
1065                         $content .= "[b]".$item->name."[/b]";
1066
1067                 $quote = "";
1068                 if(isset($item->description) and ($item->type != "photo"))
1069                         $quote = $item->description;
1070
1071                 if(isset($item->caption) and ($item->type == "photo"))
1072                         $quote = $item->caption;
1073
1074                 // Only import the picture when the message is no video
1075                 // oembed display a picture of the video as well
1076                 //if ($item->type != "video") {
1077                 //if (($item->type != "video") and ($item->type != "photo")) {
1078                 if (($type == "") OR ($type == "link")) {
1079
1080                         $type = $item->type;
1081
1082                         if(isset($item->picture) && isset($item->link))
1083                                 $content .= "\n".'[url='.$item->link.'][img]'.fpost_cleanpicture($item->picture).'[/img][/url]';
1084                         else {
1085                                 if (isset($item->picture))
1086                                         $content .= "\n".'[img]'.fpost_cleanpicture($item->picture).'[/img]';
1087                                 // if just a link, it may be a wall photo - check
1088                                 if(isset($item->link))
1089                                         $content .= fbpost_get_photo($uid,$item->link);
1090                         }
1091                 }
1092
1093                 if(trim($_REQUEST["body"].$content.$quote) == '') {
1094                         logger('facebook: empty body '.$item->id.' '.print_r($item, true));
1095                         continue;
1096                 }
1097
1098                 if ($content)
1099                         $_REQUEST["body"] .= "\n\n";
1100
1101                 if ($type)
1102                         $_REQUEST["body"] .= "[class=type-".$type."]";
1103
1104                 if ($content)
1105                         $_REQUEST["body"] .= $content;
1106
1107                 if ($quote)
1108                         $_REQUEST["body"] .= "\n[quote]".$quote."[/quote]";
1109
1110                 if ($type)
1111                         $_REQUEST["body"] .= "[/class]";
1112
1113                 $_REQUEST["body"] = trim($_REQUEST["body"]);
1114
1115                 if (isset($item->place)) {
1116                         if ($item->place->name or $item->place->location->street or
1117                                 $item->place->location->city or $item->place->location->country) {
1118                                 $_REQUEST["location"] = '';
1119                                 if ($item->place->name)
1120                                         $_REQUEST["location"] .= $item->place->name;
1121                                 if ($item->place->location->street)
1122                                         $_REQUEST["location"] .= " ".$item->place->location->street;
1123                                 if ($item->place->location->city)
1124                                         $_REQUEST["location"] .= " ".$item->place->location->city;
1125                                 if ($item->place->location->country)
1126                                         $_REQUEST["location"] .= " ".$item->place->location->country;
1127
1128                                 $_REQUEST["location"] = trim($_REQUEST["location"]);
1129                         }
1130                         if ($item->place->location->latitude and $item->place->location->longitude)
1131                                 $_REQUEST["coord"] = substr($item->place->location->latitude, 0, 8)
1132                                                 .' '.substr($item->place->location->longitude, 0, 8);
1133                 }
1134
1135                 //print_r($_REQUEST);
1136                 logger('facebook: posting for user '.$uid);
1137
1138                 require_once('mod/item.php');
1139                 item_post($a);
1140         }
1141
1142         set_pconfig($uid,'facebook','last_created', $lastcreated);
1143 }
1144
1145 function fbpost_get_photo($uid,$link) {
1146         $access_token = get_pconfig($uid,'facebook','access_token');
1147         if(! $access_token || (! stristr($link,'facebook.com/photo.php')))
1148                 return "";
1149
1150         $ret = preg_match('/fbid=([0-9]*)/',$link,$match);
1151         if($ret)
1152                 $photo_id = $match[1];
1153         else
1154                 return "";
1155
1156         $x = fetch_url('https://graph.facebook.com/'.$photo_id.'?access_token='.$access_token);
1157         $j = json_decode($x);
1158         if($j->picture)
1159                 return "\n\n".'[url='.$link.'][img]'.fpost_cleanpicture($j->picture).'[/img][/url]';
1160
1161         return "";
1162 }
1163
1164 function fpost_cleanpicture($image) {
1165
1166         if (strpos($image, ".fbcdn.net/") and (substr($image, -6) == "_s.jpg"))
1167                 $image = substr($image, 0, -6)."_n.jpg";
1168
1169         $queryvar = fbpost_parse_query($image);
1170         if ($queryvar['url'] != "")
1171                 $image = urldecode($queryvar['url']);
1172
1173         return $image;
1174 }
1175
1176 function fbpost_parse_query($var) {
1177         /**
1178          *  Use this function to parse out the query array element from
1179          *  the output of parse_url().
1180         */
1181         $var  = parse_url($var, PHP_URL_QUERY);
1182         $var  = html_entity_decode($var);
1183         $var  = explode('&', $var);
1184         $arr  = array();
1185
1186         foreach($var as $val) {
1187                 $x          = explode('=', $val);
1188                 $arr[$x[0]] = $x[1];
1189         }
1190
1191         unset($val, $x, $var);
1192         return $arr;
1193 }