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