<?php
require MODX_CORE_PATH . 'components/facebook/facebook.php';
 
//what permissions do we want
$par = array();
$par['req_perms'] = "email,user_hometown,user_website";
 
 
//
// Where do these come from? Add them as Properties to the snippet!
//
$appId= $modx->getOption('appId',$scriptProperties,'');
$secret= $modx->getOption('secret',$scriptProperties,'');
 
if(empty($appId) || empty($secret)){
$output='No AppID or Secret Provided, please obtain from developer.facebook.com';
return $output;
}
 
 
// Create our Application instance.
$facebook = new Facebook(array(
  'appId' => $appId,
  'secret' => $secret,
  'cookie' => true,
));
 
$user = $facebook->getUser();
 
 
/*
* Make the appID and current session available to the front end 
* (in case you want to add more social features using Javascript, specify those in the init() call)
*/
$modx->toPlaceholder('facebook_session',json_encode($user));
$modx->toPlaceholder('facebook_app_id',$facebook->getAppId());
 
$output="";
 
$me = null;
// Session based API call.
if ($user) {
  try {
    $uid = $facebook->getUser();
    $me = $facebook->api('/me');
 
  } catch (FacebookApiException $e) {
    error_log($e);
  }
}
 
// login or logout url will be needed depending on current user state.
if ($me) {
//die(print_r($me));
 
	$contexts = empty($contexts) ? array($modx->context->get('key')) : explode(',', $contexts);
	    foreach (array_keys($contexts) as $ctxKey) {
		$contexts[$ctxKey] = trim($contexts[$ctxKey]);
	    }
 
	$user = $modx->getObject('modUser',  array('remote_key:=' => $me['id'], 'remote_key:!=' => null));
 
	if(empty($user)){
	    	//they're new!
		//facebook may pass multiple hometowns back
		if(!empty($me['hometown'])){
			if(is_array($me['hometown'])){
			   $homet=$me['hometown'][0];
			}else{
       			   $homet=$me['hometown'];
			}
		}
 
	  	// Create an empty modx user and populate with facebook data
		$user = $modx->newObject('modUser');
		$user->fromArray(
                          array('username' => $me['name'],'active' => true
		                ,'remote_key' => $me['id'] ,'remote_data' => $me //store the remote data as json object in db (in case you need more info bout the FB user later)
		             )
                   );
 
               //We'll also toss a profile on to save their email and photo and such
		$profile = $modx->newObject('modUserProfile');
		$profile->fromArray(array(
                //old email line - isset($me['email']) ? $me['email'] : 'facebook-user@facebook.com'
		'email' =>  isset($me['email'])
		,'fullname' => $me['name']
		,'city' => $homet
                ,'photo'=> 'http://graph.facebook.com/'. $me['id'] .'/picture'
		));
		$user->addOne($profile, 'Profile');
 
 
                /** Login, (C) 2010, Jason Coward, Shaun McCormick**/
 
		/* if usergroups set */
		$usergroups = $modx->getOption('usergroups',$scriptProperties,'');
		if (!empty($usergroups)) {
		    $usergroups = explode(',',$usergroups);
 
		    foreach ($usergroups as $usergroupMeta) {
			$usergroupMeta = explode(':',$usergroupMeta);
			if (empty($usergroupMeta[0])) continue;
 
			/* get usergroup */
			$pk = array();
			$pk[intval($usergroupMeta[0]) > 0 ? 'id' : 'name'] = $usergroupMeta[0];
			$usergroup = $modx->getObject('modUserGroup',$pk);
			if (!$usergroup) continue;
 
			/* get role */
			$rolePk = !empty($usergroupMeta[1]) ? $usergroupMeta[1] : 'Member';
			$role = $modx->getObject('modUserGroupRole',array('name' => $rolePk));
 
			/* create membership */
			$member = $modx->newObject('modUserGroupMember');
			$member->set('member',0);
			$member->set('user_group',$usergroup->get('id'));
			if (!empty($role)) {
			    $member->set('role',$role->get('id'));
			} else {
			    $member->set('role',1);
			}
			$user->addMany($member,'UserGroupMembers');
		    }//end foreach
		}//end user grops
        /** End Login Code Block froom Login, (C) 2010 Jason Coward, Shaun McCormick **/
		$saved = $user->save();
	}//end if new user
 
	//new or not, they're logged in
        if(!$user->hasSessionContext('web')){
	   foreach ($contexts as $context) {
		$user->addSessionContext($context);
	   }
 
	   $modx->sendRedirect('/');
        }
 
} else {
	//else give them the chance to login
/* This should parse the generated URL with a chunk, for now you can edit the image or text here */
  	$output.= '<a href="'.$facebook->getLoginUrl($par).'"><img src="http://static.ak.fbcdn.net/rsrc.php/zB6N8/hash/4li2k73z.gif"></a>';
}
 
 
return $output;