From bd4e7249a347b012c34d23a739b56cb6aea63240 Mon Sep 17 00:00:00 2001
From: Friendika <info@friendika.com>
Date: Thu, 10 Feb 2011 18:01:38 -0800
Subject: more work on facebook addon

---
 addon/facebook/facebook.php | 95 +++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 88 insertions(+), 7 deletions(-)

(limited to 'addon/facebook/facebook.php')

diff --git a/addon/facebook/facebook.php b/addon/facebook/facebook.php
index acf37fcdb..7a7c3428a 100644
--- a/addon/facebook/facebook.php
+++ b/addon/facebook/facebook.php
@@ -10,6 +10,58 @@
  *
  */
 
+define('FACEBOOK_MAXPOSTLEN', 420);
+
+/* declare the facebook_module function so that /facebook url requests will land here */
+
+function facebook_module() {}
+
+
+
+/* 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']) ? $_GET['error_description'] : '');
+
+
+	if($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=' . $auth_code);
+		if(strpos($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',$token);
+		}
+
+		// todo: is this a browser session or a server session? where do we go? 
+	}
+
+}
+
+function facebook_content(&$a) {
+	$o = "facebook module loaded";
+	return $o;
+}
 
 function facebook_install() {
 	register_hook('post_local_end', 'addon/facebook/facebook.php', 'facebook_post_hook');
@@ -21,27 +73,56 @@ function facebook_uninstall() {
 }
 
 
-
-
 function facebook_post_hook(&$a,&$b) {
 
 	/**
 	 * Post to Facebook stream
 	 */
 
-	if((local_user()) && (local_user() == $b['uid']) && (! $b['private'])) {
+	if((local_user()) && (local_user() == $b['uid']) && (! $b['private']) && (! $b['parent'])) {
 
-		$appid  = get_config('system', 'facebook_appid'  );
-		$secret = get_config('system', 'facebook_secret' );
+		$appid  = get_config('facebook', 'appid'  );
+		$secret = get_config('facebook', 'appsecret' );
 
 		if($appid && $secret) {
 
-			$fb_post = get_pconfig(local_user(),'facebook','post');
+			$fb_post  = get_pconfig(local_user(),'facebook','post');
+			$fb_token = get_pconfig(local_user(),'facebook','access_token');
 
-			if($fb_post) {
+			if($fb_post && $fb_token) {
 				require_once('library/facebook.php');
 				require_once('include/bbcode.php');	
 
+
+				// make links readable before we strip the code
+
+				$msg = preg_replace('\[url\=(.?*)\](.?*)\[\/url\]/is','$2 ($1)',$msg);
+
+				$msg = preg_replace('\[img\](.?*)\[\/img\]/is', t('Image: ') . '$1',$msg);
+
+				$msg = trim(strip_tags(bbcode($b['body'])));
+				if (strlen($msg) > FACEBOOK_MAXPOSTLEN) {
+					$shortlink = "";
+					require_once('addon/twitter/slinky.php');
+
+					$display_url = $a->get_baseurl() . '/display/' . $a->user['nickname'] . '/' . $b['id'];
+					$slinky = new Slinky( $posturl );
+					// 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;
+
+
+
+
 				$facebook = new Facebook(array(
 					'appId'  => $appid,
 					'secret' => $secret,
-- 
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