Facebook Event WP Plugin

FacebookEvent.php

<?php
/*
Plugin Name: Facebook Event
Plugin URI: http://www.studentlund.se
Description: Detect Facebook event URL in post and update post content to match the event
Author: Niklas Lindblad
Version: 0.1
Author URI: http://niklas.lindblad.info
*/


function is_facebook_event( $url )
{
        return ( preg_match("/http(s?):\/\/www\.facebook\.com\/event.php\?eid=[0-9]*\.*/", $url) == 1 );
}

function get_facebook_event ( $url )
{
        $m = explode('=', $url);
        $eid = preg_replace("/[^0-9]/", "", $m[1]);

		// Cache entry ID
		$key = 'facebook_event_' . $eid;
		$cache = '/tmp/' . $key;

		// Check if alredy in cache
		if ( file_exists($cache) ) {
			error_log('Got event info from cache');
			return @json_decode(file_get_contents($cache));
		}

		// Create the stream context
		$context = stream_context_create(array(
		    'http' => array(
		        'timeout' => 10      // Timeout in seconds
		    )
		));

		error_log('Got event info from Facebook.com');
        $content = @file_get_contents('https://graph.facebook.com/' . $eid, 0, $context);

		// Store in cache
		@file_put_contents($cache, $content);

        if ( empty($content) ) {
                return false;
        }

        $event = @json_decode($content);

        if ( $event == null ) {
                return false;
        }

        return $event;
}

function process_facebook_event( $post_ID )
{
	
	error_log('I was called');
	
	$post = get_post($post_ID, ARRAY_A);
	
	if ( is_facebook_event($post['post_content']) ) {
		$url = $post['post_content'];
	} else if ( is_facebook_event($post['post_title']) ) {
		$url = $post['post_title'];
	} else {
		return $post_ID;
	}
	
	$event = get_facebook_event($url);	
	
	if ( $event == false ) {
		return $post_ID;
	}
	
	$updated_post = array();
	
	// Update the post
	$updated_post['ID']				= $post_ID;
	$updated_post['post_title'] 	= $event->name;
	$updated_post['post_content']	= sprintf('<b>%s</b><br />%s<br /><br />', $event->location, $event->venue->street);
	$updated_post['post_content']  .= $event->description;
	
	wp_update_post($post);
	
	// Specific for Studentlund.se
	update_post_meta($post_ID, 'datum', date('Y-m-d', strtotime($event->start_time)));
	
}

//add_action('publish_post', 'process_facebook_event');

?>