friendica/addon/facebook/facebook.php

<?php

/**
 * Installing the Friendika/Facebook connector
 *
 * 1. register an API key for your site from developer.facebook.com
 *   a. We'd be very happy if you include "Friendika" in the application name
 *      to increase name recognition. The Friendika icons are also present
 *      in the images directory and may be uploaded as a Facebook app icon.
 *      Use images/friendika-16.jpg for the Icon and images/friendika-128.jpg for the Logo.
 *   b. The url should be your site URL with a trailing slash.
 *      You may use http://portal.friendika.com/privacy as the privacy policy
 *      URL unless your site has different requirements, and 
 *      http://portal.friendika.com as the Terms of Service URL unless
 *      you have different requirements. (Friendika is a software application
 *      and does not require Terms of Service, though your installation of it might).
 *   c. Set the following values in your .htconfig.php file
 *         $a->config['facebook']['appid'] = 'xxxxxxxxxxx';
 *         $a->config['facebook']['appsecret'] = 'xxxxxxxxxxxxxxx';
 *      Replace with the settings Facebook gives you.
 * 2. Enable the facebook plugin by including it in .htconfig.php - e.g. 
 *     $a->config['system']['addon'] = 'plugin1,plugin2,facebook';
 * 3. Visit the Facebook Settings section of the "Settings->Plugin Settings" page.
 *    and click 'Install Facebook Connector'.
 * 4. This will ask you to login to Facebook and grant permission to the 
 *    plugin to do its stuff. Allow it to do so. 
 * 5. You're done. To turn it off visit the Plugin Settings page again and
 *    'Remove Facebook posting'.
 *
 * Vidoes and embeds will not be posted if there is no other content. Links 
 * and images will be converted to a format suitable for the Facebook API and 
 * long posts truncated - with a link to view the full post. 
 *
 * Facebook contacts will not be able to view private photos, as they are not able to
 * authenticate to your site to establish identity. We will address this 
 * in a future release.
 */

define('FACEBOOK_MAXPOSTLEN', 420);

/* declare the facebook_module function so that /facebook url requests will land here */

function facebook_module() {}



/* If a->argv[1] is a nickname, this is a callback from Facebook oauth requests. */

function facebook_init(&$a) {

	if($a->argc != 2)
		return;
	$nick = $a->argv[1];
	if(strlen($nick))
		$r = q("SELECT `uid` FROM `user` WHERE `nickname` = '%s' LIMIT 1",
				dbesc($nick)
		);
	if(! count($r))
		return;

	$uid           = $r[0]['uid'];
	$auth_code     = (($_GET['code']) ? $_GET['code'] : '');
	$error         = (($_GET['error_description']) ? $_GET['error_description'] : '');


	if($error)
		logger('facebook_init: Error: ' . $error);

	if($auth_code && $uid) {

		$appid = get_config('facebook','appid');
		$appsecret = get_config('facebook', 'appsecret');

		$x = fetch_url('https://graph.facebook.com/oauth/access_token?client_id='
			. $appid . '&client_secret=' . $appsecret . '&redirect_uri='
			. urlencode($a->get_baseurl() . '/facebook/' . $nick) 
			. '&code=' . $auth_code);

		logger('facebook_init: returned access token: ' . $x, LOGGER_DATA);

		if(strpos($x,'access_token=') !== false) {
			$token = str_replace('access_token=', '', $x);
 			if(strpos($token,'&') !== false)
				$token = substr($token,0,strpos($token,'&'));
			set_pconfig($uid,'facebook','access_token',$token);
			set_pconfig($uid,'facebook','post','1');
			fb_get_self($uid);
			fb_get_friends($uid);
			fb_consume_all($uid);

		}

		// todo: is this a browser session or a server session? where do we go? 
	}

}


function fb_get_self($uid) {
	$access_token = get_pconfig($uid,'facebook','access_token');
	if(! $access_token)
		return;
	$s = fetch_url('https://graph.facebook.com/me/?access_token=' . $access_token);
	if($s) {
		$j = json_decode($s);
		set_pconfig($uid,'facebook','self_id',(string) $j->id);
	}
}



function fb_get_friends($uid) {

	$access_token = get_pconfig($uid,'facebook','access_token');

	$no_linking = get_pconfig($uid,'facebook','no_linking');
	if($no_linking)
		return;

	if(! $access_token)
		return;
	$s = fetch_url('https://graph.facebook.com/me/friends?access_token=' . $access_token);
	if($s) {
		logger('facebook: fb_get_friends: ' . $s, LOGGER_DATA);
		$j = json_decode($s);
		logger('facebook: fb_get_friends: json: ' . print_r($j,true), LOGGER_DATA);
		foreach($j->data as $person) {
			$s = fetch_url('https://graph.facebook.com/' . $person->id . '?access_token=' . $access_token);
			if($s) {
				$jp = json_decode($s);
				logger('fb_get_friends: info: ' . print_r($jp,true), LOGGER_DATA);

				// always use numeric link for consistency

				$jp->link = 'http://facebook.com/profile.php?id=' . $person->id;

				// check if we already have a contact

				$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `url` = '%s' LIMIT 1",
					intval($uid),
					dbesc($jp->link)
				);			

				if(count($r)) {

					// check that we have all the photos, this has been known to fail on occasion

					if((! $r[0]['photo']) || (! $r[0]['thumb']) || (! $r[0]['micro'])) {  
						require_once("Photo.php");

						$photos = import_profile_photo('https://graph.facebook.com/' . $jp->id . '/picture', $uid, $r[0]['id']);

						$r = q("UPDATE `contact` SET `photo` = '%s', 
							`thumb` = '%s',
							`micro` = '%s', 
							`name-date` = '%s', 
							`uri-date` = '%s', 
							`avatar-date` = '%s'
							WHERE `id` = %d LIMIT 1
						",
							dbesc($photos[0]),
							dbesc($photos[1]),
							dbesc($photos[2]),
							dbesc(datetime_convert()),
							dbesc(datetime_convert()),
							dbesc(datetime_convert()),
							intval($r[0]['id'])
						);			
					}	
					continue;
				}
				else {

					// create contact record 
					$r = q("INSERT INTO `contact` ( `uid`, `created`, `url`, `addr`, `alias`, `notify`, `poll`, 
						`name`, `nick`, `photo`, `network`, `rel`, `priority`,
						`writable`, `blocked`, `readonly`, `pending` )
						VALUES ( %d, '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', '%s', %d, %d, %d, 0, 0, 0 ) ",
						intval($uid),
						dbesc(datetime_convert()),
						dbesc($jp->link),
						dbesc(''),
						dbesc(''),
						dbesc($jp->id),
						dbesc('facebook ' . $jp->id),
						dbesc($jp->name),
						dbesc(($jp->nickname) ? $jp->nickname : strtolower($jp->first_name)),
						dbesc('https://graph.facebook.com/' . $jp->id . '/picture'),
						dbesc(NETWORK_FACEBOOK),
						intval(REL_BUD),
						intval(1),
						intval(1)
					);
				}

				$r = q("SELECT * FROM `contact` WHERE `url` = '%s' AND `uid` = %d LIMIT 1",
					dbesc($jp->link),
					intval($uid)
				);

				if(! count($r)) {
					continue;
				}

				$contact = $r[0];
				$contact_id  = $r[0]['id'];

				require_once("Photo.php");

				$photos = import_profile_photo($r[0]['photo'],$uid,$contact_id);

				$r = q("UPDATE `contact` SET `photo` = '%s', 
					`thumb` = '%s',
					`micro` = '%s', 
					`name-date` = '%s', 
					`uri-date` = '%s', 
					`avatar-date` = '%s'
					WHERE `id` = %d LIMIT 1
				",
					dbesc($photos[0]),
					dbesc($photos[1]),
					dbesc($photos[2]),
					dbesc(datetime_convert()),
					dbesc(datetime_convert()),
					dbesc(datetime_convert()),
					intval($contact_id)
				);			

			}
		}
	}
}


function facebook_post(&$a) {

	$uid = local_user();
	if($uid){

		$value = ((x($_POST,'post_by_default')) ? intval($_POST['post_by_default']) : 0);
		set_pconfig($uid,'facebook','post_by_default', $value);

		$no_linking = get_pconfig($uid,'facebook','no_linking');

		$linkvalue = ((x($_POST,'facebook_linking')) ? intval($_POST['facebook_linking']) : 0);
		set_pconfig($uid,'facebook','no_linking', (($linkvalue) ? 0 : 1));

		// FB linkage was allowed but has just been turned off - remove all FB contacts and posts

		if((! intval($no_linking)) && (! intval($linkvalue))) {
			$r = q("SELECT `id` FROM `contact` WHERE `uid` = %d AND `network` = '%s' ",
				intval($uid),
				dbesc(NETWORK_FACEBOOK)
			);
			if(count($r)) {
				require_once('include/Contact.php');
				foreach($r as $rr)
					contact_remove($rr['id']);
			}
		}
		elseif(intval($no_linking) && intval($linkvalue)) {
			// FB linkage is now allowed - import stuff.
			fb_get_self($uid);
			fb_get_friends($uid);
			fb_consume_all($uid);
		}

		info( t('Settings updated.') . EOL);
	} 

	return;		
}

function facebook_content(&$a) {

	if(! local_user()) {
		notice( t('Permission denied.') . EOL);
		return '';
	}

	if($a->argc > 1 && $a->argv[1] === 'remove') {
		del_pconfig(local_user(),'facebook','post');
		info( t('Facebook disabled') . EOL);
	}

	if($a->argc > 1 && $a->argv[1] === 'friends') {
		fb_get_friends(local_user());
		info( t('Updating contacts') . EOL);
	}


	$fb_installed = get_pconfig(local_user(),'facebook','post');

	$appid = get_config('facebook','appid');

	if(! $appid) {
		notice( t('Facebook API key is missing.') . EOL);
		return '';
	}

	$a->page['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="' 
		. $a->get_baseurl() . '/addon/facebook/facebook.css' . '" media="all" />' . "\r\n";

	$o .= '<h3>' . t('Facebook Connect') . '</h3>';

	if(! $fb_installed) { 
		$o .= '<div id="facebook-enable-wrapper">';

		$o .= '<a href="https://www.facebook.com/dialog/oauth?client_id=' . $appid . '&redirect_uri=' 
			. $a->get_baseurl() . '/facebook/' . $a->user['nickname'] . '&scope=publish_stream,read_stream,offline_access">' . t('Install Facebook connector for this account.') . '</a>';
		$o .= '</div>';
	}

	if($fb_installed) {
		$o .= '<div id="facebook-disable-wrapper">';

		$o .= '<a href="' . $a->get_baseurl() . '/facebook/remove' . '">' . t('Remove Facebook connector') . '</a></div>';
	
		$o .= '<div id="facebook-post-default-form">';
		$o .= '<form action="facebook" method="post" >';
		$post_by_default = get_pconfig(local_user(),'facebook','post_by_default');
		$checked = (($post_by_default) ? ' checked="checked" ' : '');
		$o .= '<input type="checkbox" name="post_by_default" value="1"' . $checked . '/>' . ' ' . t('Post to Facebook by default') . '<br />';

		$no_linking = get_pconfig(local_user(),'facebook','no_linking');
		$checked = (($no_linking) ? '' : ' checked="checked" ');
		$o .= '<input type="checkbox" name="facebook_linking" value="1"' . $checked . '/>' . ' ' . t('Link all your Facebook friends and conversations') . '<br />';



		$o .= '<input type="submit" name="submit" value="' . t('Submit') . '" /></form></div>';
	}

	return $o;
}

function facebook_install() {
	register_hook('post_local_end',   'addon/facebook/facebook.php', 'facebook_post_hook');
	register_hook('jot_networks',     'addon/facebook/facebook.php', 'facebook_jot_nets');
	register_hook('plugin_settings',  'addon/facebook/facebook.php', 'facebook_plugin_settings');
	register_hook('cron',             'addon/facebook/facebook.php', 'facebook_cron');
	register_hook('queue_predeliver', 'addon/facebook/facebook.php', 'fb_queue_hook');
}


function facebook_uninstall() {
	unregister_hook('post_local_end',   'addon/facebook/facebook.php', 'facebook_post_hook');
	unregister_hook('jot_networks',     'addon/facebook/facebook.php', 'facebook_jot_nets');
	unregister_hook('plugin_settings',  'addon/facebook/facebook.php', 'facebook_plugin_settings');
	unregister_hook('cron',             'addon/facebook/facebook.php', 'facebook_cron');
	unregister_hook('queue_predeliver', 'addon/facebook/facebook.php', 'fb_queue_hook');
}


function facebook_cron($a,$b) {

	$last = get_config('facebook','last_poll');
	
	$poll_interval = intval(get_config('facebook','poll_interval'));
	if(! $poll_interval)
		$poll_interval = 3600;

	if($last) {
		$next = $last + $poll_interval;
		if($next > time()) 
			return;
	}

	logger('facebook_cron');

	set_config('facebook','last_poll', time());

	$r = q("SELECT * FROM `pconfig` WHERE `cat` = 'facebook' AND `k` = 'post' AND `v` = '1' ");
	if(count($r)) {
		foreach($r as $rr) {
			// check for new friends once a day
			$last_friend_check = get_pconfig($rr['uid'],'facebook','friend_check');
			if($last_friend_check) 
				$next_friend_check = $last_friend_check + 86400;
			if($next_friend_check <= time()) {
				fb_get_friends($rr['uid']);
				set_pconfig($rr['uid'],'facebook','friend_check',time());
			}
			fb_consume_all($rr['uid']);
		}
	}	
}



function facebook_plugin_settings(&$a,&$b) {

	$b .= '<div class="settings-block">';
	$b .= '<h3>' . t('Facebook') . '</h3>';
	$b .= '<a href="facebook">' . t('Facebook Connector Settings') . '</a><br />';
	$b .= '</div>';

}

function facebook_jot_nets(&$a,&$b) {
	if(! local_user())
		return;

	$fb_post = get_pconfig(local_user(),'facebook','post');
	if(intval($fb_post) == 1) {
		$fb_defpost = get_pconfig(local_user(),'facebook','post_by_default');
		$selected = ((intval($fb_defpost) == 1) ? ' checked="checked" ' : '');
		$b .= '<div class="profile-jot-net"><input type="checkbox" name="facebook_enable"' . $selected . 'value="1" /> ' 
			. t('Post to Facebook') . '</div>';	
	}
}


function facebook_post_hook(&$a,&$b) {

	/**
	 * Post to Facebook stream
	 */

	require_once('include/group.php');

	logger('Facebook post');

	$reply = false;
	$likes = false;

	if((local_user()) && (local_user() == $b['uid'])) {

		if($b['parent']) {
			$r = q("SELECT * FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
				intval($b['parent']),
				intval(local_user())
			);
			if(count($r) && substr($r[0]['uri'],0,4) === 'fb::')
				$reply = substr($r[0]['uri'],4);
			elseif(count($r) && substr($r[0]['extid'],0,4) === 'fb::')
				$reply = substr($r[0]['extid'],4);
			else
				return;
			logger('facebook reply id=' . $reply);
		}

		if($b['private'] && $reply === false) {
			$allow_people = expand_acl($b['allow_cid']);
			$allow_groups = expand_groups(expand_acl($b['allow_gid']));
			$deny_people  = expand_acl($b['deny_cid']);
			$deny_groups  = expand_groups(expand_acl($b['deny_gid']));

			$recipients = array_unique(array_merge($allow_people,$allow_groups));
			$deny = array_unique(array_merge($deny_people,$deny_groups));

			$allow_str = dbesc(implode(', ',$recipients));
			if($allow_str) {
				$r = q("SELECT `notify` FROM `contact` WHERE `id` IN ( $allow_str ) AND `network` = 'face'"); 
				$allow_arr = array();
				if(count($r)) 
					foreach($r as $rr)
						$allow_arr[] = $rr['notify'];
			}

			$deny_str = dbesc(implode(', ',$deny));
			if($deny_str) {
				$r = q("SELECT `notify` FROM `contact` WHERE `id` IN ( $deny_str ) AND `network` = 'face'"); 
				$deny_arr = array();
				if(count($r)) 
					foreach($r as $rr)
						$deny_arr[] = $rr['notify'];
			}

			if(count($deny_arr) && (! count($allow_arr))) {

				// One or more FB folks were denied access but nobody on FB was specifically allowed access.
				// This might cause the post to be open to public on Facebook, but only to selected members
				// on another network. Since this could potentially leak a post to somebody who was denied, 
				// we will skip posting it to Facebook with a slightly vague but relevant message that will 
				// hopefully lead somebody to this code comment for a better explanation of what went wrong.

				notice( t('Post to Facebook cancelled because of multi-network access permission conflict.') . EOL);
				return;
			}


			// if it's a private message but no Facebook members are allowed or denied, skip Facebook post

			if((! count($allow_arr)) && (! count($deny_arr)))
				return;
		}

		if($b['verb'] == ACTIVITY_LIKE)
			$likes = true;				


		$appid  = get_config('facebook', 'appid'  );
		$secret = get_config('facebook', 'appsecret' );

		if($appid && $secret) {

			logger('facebook: have appid+secret');

			$fb_post   = intval(get_pconfig(local_user(),'facebook','post'));
			$fb_enable = (($fb_post && x($_POST,'facebook_enable')) ? intval($_POST['facebook_enable']) : 0);
			$fb_token  = get_pconfig(local_user(),'facebook','access_token');

			logger('facebook: $fb_post: ' . $fb_post . ' $fb_enable: ' . $fb_enable . ' $fb_token: ' . $fb_token,LOGGER_DEBUG); 

			// post to facebook if it's a public post and we've ticked the 'post to Facebook' box, 
			// or it's a private message with facebook participants
			// or it's a reply or likes action to an existing facebook post			

			if($fb_post && $fb_token && ($fb_enable || $b['private'] || $reply)) {
				logger('facebook: able to post');
				require_once('library/facebook.php');
				require_once('include/bbcode.php');	

				$msg = $b['body'];

				logger('Facebook post: original msg=' . $msg, LOGGER_DATA);

				// make links readable before we strip the code

				// unless it's a dislike - just send the text as a comment

				if($b['verb'] == ACTIVITY_DISLIKE)
					$msg = trim(strip_tags(bbcode($msg)));

				$search_str = $a->get_baseurl() . '/search';

				if(preg_match("/\[url=(.+?)\](.+?)\[\/url\]/is",$msg,$matches)) {

					// don't use hashtags for message link

					if(strpos($matches[2],$search_str) === false) {
						$link = $matches[1];
						if(substr($matches[2],0,5) != '[img]')
							$linkname = $matches[2];
					}
				}

				$msg = preg_replace("/\[url=(.+?)\](.+?)\[\/url\]/is",'$2 $1',$msg);

				if(preg_match("/\[img\](.+?)\[\/img\]/is",$msg,$matches))
					$image = $matches[1];

				$msg = preg_replace("/\[img\](.+?)\[\/img\]/is", t('Image: ') . '$1', $msg);

				if((strpos($link,$a->get_baseurl()) !== false) && (! $image))
					$image = $a->get_baseurl() . '/images/friendika-64.jpg';

				$msg = trim(strip_tags(bbcode($msg)));
				$msg = html_entity_decode($msg,ENT_QUOTES,'UTF-8');

				// add any attachments as text urls

			    $arr = explode(',',$b['attach']);

			    if(count($arr)) {
					$msg .= "\n";
        			foreach($arr as $r) {
            			$matches = false;
						$cnt = preg_match('|\[attach\]href=\"(.+?)\" size=\"(.+?)\" type=\"(.+?)\" title=\"(.+?)\"\[\/attach\]|',$r,$matches);
						if($cnt) {
							$msg .= $matches[1];
						}
					}
				}

				if (strlen($msg) > FACEBOOK_MAXPOSTLEN) {
					$shortlink = "";
					require_once('library/slinky.php');

					$display_url = $a->get_baseurl() . '/display/' . $a->user['nickname'] . '/' . $b['id'];
					$slinky = new Slinky( $display_url );
					// setup a cascade of shortening services
					// try to get a short link from these services
					// in the order ur1.ca, trim, id.gd, tinyurl
					$slinky->set_cascade( array( new Slinky_UR1ca(), new Slinky_Trim(), new Slinky_IsGd(), new Slinky_TinyURL() ) );
					$shortlink = $slinky->short();
					// the new message will be shortened such that "... $shortlink"
					// will fit into the character limit
					$msg = substr($msg, 0, FACEBOOK_MAXPOSTLEN - strlen($shortlink) - 4);
					$msg .= '... ' . $shortlink;
				}
				if(! strlen($msg))
					return;

				logger('Facebook post: msg=' . $msg, LOGGER_DATA);

				if($likes) { 
					$postvars = array('access_token' => $fb_token);
				}
				else {
					$postvars = array(
						'access_token' => $fb_token, 
						'message' => $msg
					);
					if(isset($image))
						$postvars['picture'] = $image;
					if(isset($link))
						$postvars['link'] = $link;
					if(isset($linkname))
						$postvars['name'] = $linkname;
				}

				if(($b['private']) && (! $b['parent'])) {
					$postvars['privacy'] = '{"value": "CUSTOM", "friends": "SOME_FRIENDS"';
					if(count($allow_arr))
						$postvars['privacy'] .= ',"allow": "' . implode(',',$allow_arr) . '"';
					if(count($deny_arr))
						$postvars['privacy'] .= ',"deny": "' . implode(',',$deny_arr) . '"';
					$postvars['privacy'] .= '}';

				}

				if($reply) {
					$url = 'https://graph.facebook.com/' . $reply . '/' . (($likes) ? 'likes' : 'comments');
				}
				else { 
					$url = 'https://graph.facebook.com/me/feed';
					if($b['plink'])
						$postvars['actions'] = '{"name": "' . t('View on Friendika') . '", "link": "' .  $b['plink'] . '"}';
				}

				logger('facebook: post to ' . $url);
				logger('facebook: postvars: ' . print_r($postvars,true));

				// "test_mode" prevents anything from actually being posted.
				// Otherwise, let's do it. 

				if(! get_config('facebook','test_mode')) {
					$x = post_url($url, $postvars);

					$retj = json_decode($x);
					if($retj->id) {
						q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d LIMIT 1",
							dbesc('fb::' . $retj->id),
							intval($b['id'])
						);
					}
					else {
						if(! $likes) {
							$s = serialize(array('url' => $url, 'item' => $b, 'post' => $postvars));
							q("INSERT INTO `queue` ( `network`, `cid`, `created`, `last`, `content`)
								VALUES ( '%s', '%s', '%s', '%s') ",
								dbesc(NETWORK_FACEBOOK),
								intval($a->contact),
								dbesc(datetime_convert()),
								dbesc(datetime_convert()),
								dbesc($s)
							);								

							notice( t('Facebook post failed. Queued for retry.') . EOL);
						}
					}
					
					logger('Facebook post returns: ' . $x, LOGGER_DEBUG);
				}
			}
		}
	}
}


function fb_queue_hook(&$a,&$b) {

	require_once('include/queue_fn.php');
	if((! is_array($b)) || (! count($b)))
		return;
	foreach($b as $x) {
		if($b['network'] !== NETWORK_FACEBOOK)
			continue;
		$r = q("SELECT `user`.* FROM `user` LEFT JOIN `contact` on `contact`.`uid` = `user`.`uid` 
			WHERE `contact`.`self` = 1 AND `contact`.`id` = %d LIMIT 1",
			intval($x['cid'])
		);
		if(! count($r))
			continue;

		$user = $r[0];

		$appid  = get_config('facebook', 'appid'  );
		$secret = get_config('facebook', 'appsecret' );

		if($appid && $secret) {
			$fb_post   = intval(get_pconfig($user['uid'],'facebook','post'));
			$fb_token  = get_pconfig($user['uid'],'facebook','access_token');

			if($fb_post && $fb_token) {
				logger('facebook_queue: able to post');
				require_once('library/facebook.php');

				$z = unserialize($x['content']);
				$item = $z['item'];
				$j = post_url($z['url'],$z['post']);

				$retj = json_decode($j);
				if($retj->id) {
					q("UPDATE `item` SET `extid` = '%s' WHERE `id` = %d LIMIT 1",
						dbesc('fb::' . $retj->id),
						intval($item['id'])
					);
					logger('facebook queue: success: ' . $j); 
					remove_queue_item($x['id']);
				}
				else {
					logger('facebook_queue: failed: ' . $j);
					update_queue_time($x['id']);
				}
			}
		}
	}
}

function fb_consume_all($uid) {

	require_once('include/items.php');

	$access_token = get_pconfig($uid,'facebook','access_token');
	if(! $access_token)
		return;
	$s = fetch_url('https://graph.facebook.com/me/feed?access_token=' . $access_token);
	if($s) {
		$j = json_decode($s);
		logger('fb_consume_stream: wall: ' . print_r($j,true), LOGGER_DATA);
		fb_consume_stream($uid,$j,true);
	}
	$s = fetch_url('https://graph.facebook.com/me/home?access_token=' . $access_token);
	if($s) {
		$j = json_decode($s);
		logger('fb_consume_stream: feed: ' . print_r($j,true), LOGGER_DATA);
		fb_consume_stream($uid,$j,false);
	}

}

function fb_consume_stream($uid,$j,$wall = false) {
	$a = get_app();

	$no_linking = get_pconfig($uid,'facebook','no_linking');
	if($no_linking)
		return;

	$self = q("SELECT * FROM `contact` WHERE `self` = 1 AND `uid` = %d LIMIT 1",
		intval($uid)
	);

	$user = q("SELECT `nickname` FROM `user` WHERE `uid` = %d LIMIT 1",
		intval($uid)
	);
	if(count($user))
		$my_local_url = $a->get_baseurl() . '/profile/' . $user[0]['nickname'];


	$self_id = get_pconfig($uid,'facebook','self_id');
	if(! count($j->data) || (! strlen($self_id)))
		return;

	foreach($j->data as $entry) {
		logger('fb_consume: entry: ' . print_r($entry,true), LOGGER_DATA);
		$datarray = array();

		$r = q("SELECT * FROM `item` WHERE ( `uri` = '%s' OR `extid` = '%s') AND `uid` = %d LIMIT 1",
				dbesc('fb::' . $entry->id),
				dbesc('fb::' . $entry->id),
				intval($uid)
		);
		if(count($r)) {
			$post_exists = true;
			$orig_post = $r[0];
			$top_item = $r[0]['id'];
		}
		else {
			$post_exists = false;
			$orig_post = null;
		}

		if(! $orig_post) {
			$datarray['gravity'] = 0;
			$datarray['uid'] = $uid;
			$datarray['wall'] = (($wall) ? 1 : 0);
			$datarray['uri'] = $datarray['parent-uri'] = 'fb::' . $entry->id;
			$from = $entry->from;
			if($from->id == $self_id)
				$datarray['contact-id'] = $self[0]['id'];
			else {
				$r = q("SELECT * FROM `contact` WHERE `notify` = '%s' AND `uid` = %d AND `blocked` = 0 AND `readonly` = 0 LIMIT 1",
					dbesc($from->id),
					intval($uid)
				);
				if(count($r))
					$datarray['contact-id'] = $r[0]['id'];
			}

			// don't store post if we don't have a contact

			if(! x($datarray,'contact-id')) {
				logger('no contact: post ignored');
				continue; 
			}

			$datarray['verb'] = ACTIVITY_POST;						
			if($wall) {
				$datarray['owner-name'] = $self[0]['name'];
				$datarray['owner-link'] = $self[0]['url'];
				$datarray['owner-avatar'] = $self[0]['thumb'];
			}
			$datarray['author-name'] = $from->name;
			$datarray['author-link'] = 'http://facebook.com/profile.php?id=' . $from->id;
			$datarray['author-avatar'] = 'https://graph.facebook.com/' . $from->id . '/picture';
			$datarray['plink'] = $datarray['author-link'] . '&v=wall&story_fbid=' . substr($entry->id,strpos($entry->id,'_') + 1);

			$datarray['body'] = $entry->message;
			if($entry->picture)
				$datarray['body'] .= "\n\n" . '[img]' . $entry->picture . '[/img]';
			if($entry->link)
				$datarray['body'] .= "\n" . linkify($entry->link);
			if($entry->name)
				$datarray['body'] .= "\n" . $entry->name;
			if($entry->caption)
				$datarray['body'] .= "\n" . $entry->caption;
			if($entry->description)
				$datarray['body'] .= "\n" . $entry->description;
			$datarray['created'] = datetime_convert('UTC','UTC',$entry->created_time);
			$datarray['edited'] = datetime_convert('UTC','UTC',$entry->updated_time);
			if($entry->privacy && $entry->privacy->value !== 'EVERYONE')
				$datarray['private'] = 1;			
			$top_item = item_store($datarray);
			$r = q("SELECT * FROM `item` WHERE `id` = %d AND `uid` = %d LIMIT 1",
				intval($top_item),
				intval($uid)
			);			
			if(count($r)) {
				$orig_post = $r[0];
				logger('fb: new top level item posted');
			}
		}

		if(isset($entry->likes) && isset($entry->likes->data))
			$likers = $entry->likes->data;
		else
			$likers = null;

		if(isset($entry->comments) && isset($entry->comments->data))
			$comments = $entry->comments->data;
		else
			$comments = null;

		if(is_array($likers)) {
			foreach($likers as $likes) {

				if(! $orig_post)
					continue;

				// If we posted the like locally, it will be found with our url, not the FB url.

				$second_url = (($likes->id == $self_id) ? $self[0]['url'] : 'http://facebook.com/profile.php?id=' . $likes->id); 

				$r = q("SELECT * FROM `item` WHERE `parent-uri` = '%s' AND `uid` = %d AND `verb` = '%s' 
					AND ( `author-link` = '%s' OR `author-link` = '%s' ) LIMIT 1",
					dbesc($orig_post['uri']),
					intval($uid),
					dbesc(ACTIVITY_LIKE),
					dbesc('http://facebook.com/profile.php?id=' . $likes->id),
					dbesc($second_url)
				);

				if(count($r))
					continue;
					
				$likedata = array();
				$likedata['parent'] = $top_item;
				$likedata['verb'] = ACTIVITY_LIKE;
				$likedata['gravity'] = 3;
				$likedata['uid'] = $uid;
				$likedata['wall'] = (($wall) ? 1 : 0);
				$likedata['uri'] = item_new_uri($a->get_baseurl(), $uid);
				$likedata['parent-uri'] = $orig_post['uri'];
				if($likes->id == $self_id)
					$likedata['contact-id'] = $self[0]['id'];
				else {
					$r = q("SELECT * FROM `contact` WHERE `notify` = '%s' AND `uid` = %d AND `blocked` = 0 AND `readonly` = 0 LIMIT 1",
						dbesc($likes->id),
						intval($uid)
					);
					if(count($r))
						$likedata['contact-id'] = $r[0]['id'];
				}
				if(! x($likedata,'contact-id'))
					$likedata['contact-id'] = $orig_post['contact-id'];

				$likedata['verb'] = ACTIVITY_LIKE;						
				$likedata['author-name'] = $likes->name;
				$likedata['author-link'] = 'http://facebook.com/profile.php?id=' . $likes->id;
				$likedata['author-avatar'] = 'https://graph.facebook.com/' . $likes->id . '/picture';
				
				$author  = '[url=' . $likedata['author-link'] . ']' . $likedata['author-name'] . '[/url]';
				$objauthor =  '[url=' . $orig_post['author-link'] . ']' . $orig_post['author-name'] . '[/url]';
				$post_type = t('status');
        		$plink = '[url=' . $orig_post['plink'] . ']' . $post_type . '[/url]';
				$likedata['object-type'] = ACTIVITY_OBJ_NOTE;

				$likedata['body'] = sprintf( t('%1$s likes %2$s\'s %3$s'), $author, $objauthor, $plink);
				$likedata['object'] = '<object><type>' . ACTIVITY_OBJ_NOTE . '</type><local>1</local>' . 
					'<id>' . $orig_post['uri'] . '</id><link>' . xmlify('<link rel="alternate" type="text/html" href="' . $orig_post['plink'] . '">') . '</link><title>' . $orig_post['title'] . '</title><content>' . $orig_post['body'] . '</content></object>';  

				$item = item_store($likedata);			
			}
		}
		if(is_array($comments)) {
			foreach($comments as $cmnt) {

				if(! $orig_post)
					continue;

				$r = q("SELECT * FROM `item` WHERE `uid` = %d AND ( `uri` = '%s' OR `extid` = '%s' ) LIMIT 1",
					intval($uid),
					dbesc('fb::' . $cmnt->id),
					dbesc('fb::' . $cmnt->id)
				);
				if(count($r))
					continue;

				$cmntdata = array();
				$cmntdata['parent'] = $top_item;
				$cmntdata['verb'] = ACTIVITY_POST;
				$cmntdata['gravity'] = 6;
				$cmntdata['uid'] = $uid;
				$cmntdata['wall'] = (($wall) ? 1 : 0);
				$cmntdata['uri'] = 'fb::' . $cmnt->id;
				$cmntdata['parent-uri'] = $orig_post['uri'];
				if($cmnt->from->id == $self_id) {
					$cmntdata['contact-id'] = $self[0]['id'];
				}
				else {
					$r = q("SELECT * FROM `contact` WHERE `notify` = '%s' AND `uid` = %d LIMIT 1",
						dbesc($cmnt->from->id),
						intval($uid)
					);
					if(count($r)) {
						$cmntdata['contact-id'] = $r[0]['id'];
						if($r[0]['blocked'] || $r[0]['readonly'])
							continue;
					}
				}
				if(! x($cmntdata,'contact-id'))
					$cmntdata['contact-id'] = $orig_post['contact-id'];

				$cmntdata['created'] = datetime_convert('UTC','UTC',$cmnt->created_time);
				$cmntdata['edited']  = datetime_convert('UTC','UTC',$cmnt->created_time);
				$cmntdata['verb'] = ACTIVITY_POST;						
				$cmntdata['author-name'] = $cmnt->from->name;
				$cmntdata['author-link'] = 'http://facebook.com/profile.php?id=' . $cmnt->from->id;
				$cmntdata['author-avatar'] = 'https://graph.facebook.com/' . $cmnt->from->id . '/picture';
				$cmntdata['body'] = $cmnt->message;
				$item = item_store($cmntdata);			
			}
		}
	}
}