Sync-Facebook-Events/sync-facebook-events.php

<?php
/*
Plugin Name: Sync Facebook Events
Plugin URI: http://pdxt.com
Description: Sync Facebook Events to The Events Calendar Plugin
Author: Mark Nelson
Version: 1.0.9
Author URI: http://pdxt.com
*/

/*  Copyright 2012 PDX Technologies, LLC. (mark.nelson@pdxt.com)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/

register_activation_hook(__FILE__,'activate_fbes');
register_deactivation_hook(__FILE__,'deactivate_fbes');
function activate_fbes() { wp_schedule_event(time(), 'daily', 'fbes_execute_sync'); }
function deactivate_fbes() { wp_clear_scheduled_hook('fbes_execute_sync'); }
add_action('fbes_execute_sync', 'fbes_process_events');

function update_schedule($fbes_frequency) {

		wp_clear_scheduled_hook('fbes_execute_sync');
		wp_schedule_event(time(), $fbes_frequency, 'fbes_execute_sync');
}

function fbes_add_page() { add_options_page('Sync FB Events', 'Sync FB Events', 8, __FILE__, 'fbes_options_page'); }
add_action('admin_menu', 'fbes_add_page');

function fbes_process_events() {

	#Get option values
	$fbes_api_key = get_option('fbes_api_key');
	$fbes_api_secret = get_option('fbes_api_secret');
	$fbes_api_uid = get_option('fbes_api_uid');
	$fbes_api_uids = get_option('fbes_api_uids');
	$fbes_frequency = get_option('fbes_frequency');
//	$fbes_access_token = $fbes_api_key+"|"+$fbes_api_secret;
	$fbes_access_token = get_option('fbes_access_token'); // modified


	$events = fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_access_token, $fbes_api_uids);
	fbes_send_events($events);
}

function fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_access_token, $fbes_api_uids) {

	require_once 'facebook-php-sdk/facebook.php'; //modified

	$facebook = new Facebook(array(
		'appId'  =>  $fbes_api_key,
		'secret' =>  $fbes_api_secret,
		'cookie' => true,
	));

	$facebook->setAccessToken($fbes_access_token);

  $ret = array();
  foreach ($fbes_api_uids as $key => $value) {
    if($value!='') {
      $result = $facebook->api('/'.$value.'/events', 'GET', array(
        'fields' => 'name,start_time,end_time,place,description,timezone',
	'date_format' => 'U'
      ));
      $result = $result['data'];
      foreach($result as $k => $v){
        $result[$k]['uid'] = $value;
        $result[$k]['start_time'] = strtotime($result[$k]['start_time']);
        $result[$k]['end_time'] = strtotime($result[$k]['end_time']);
        if($result[$k]['place']){
          if($result[$k]['place']['name']){
            $result[$k]['location'] = $result[$k]['place']['name'];
          }else{
            $result[$k]['location'] = $result[$k]['place'];
          }
        }
      }
      $ret = array_merge($ret, $result);
    }
  }
  return $ret;
}

function fbes_segments($url='') {
	$parsed_url = parse_url($url);
	$path = trim($parsed_url['path'],'/');
	return explode('/',$path);
}

function fbes_send_events($events) {
	$eids = array();
	$query = new WP_Query(array(
		'post_type'=>'tribe_events',
		'posts_per_page'=>'-1'
	));
	foreach($query->posts as $post) {
		if(!empty($post->to_ping)) {
			$segments = fbes_segments($post->to_ping);
			$eid = array_pop($segments);
			$eids[$eid] = $post->ID;
		}
//if you're reading this and you want to delete all those duplicate events, uncomment this temporarially. Note, it will also delete all manually made events since June 13
//http://codex.wordpress.org/Version_3.4 - June 13, 2012
//depending on many duplicates you had, you might end up re-loading this script a bunch of times after it times out. Me, I had 14k duplicates. Had to run the script like 10 times.
/*
		else {
			$post_date = trim(substr($post->post_date, 0, 10));
			if($post->post_date > '2012-06-12')
				wp_delete_post($post->ID);
		}
*/
	}
	//file_put_contents($_SERVER['DOCUMENT_ROOT'].'/fbevent.log', print_r(array(time(),$events,$eids),1)."\n".str_repeat('=',40)."\n", FILE_APPEND);

	foreach($events as $event) {

		$args['post_title'] = $event['name'];

		$offset = get_option('gmt_offset')*3600;

		$offsetStart = $event['start_time']+$offset;
		$offsetEnd = $event['end_time']+$offset;

		//don't update or insert events from the past.
		if($offsetStart > time()) {

			$args['EventStartDate'] = date("Y-m-d", $offsetStart);
			$args['EventStartHour'] = date("H", $offsetStart);
			$args['EventStartMinute'] = date("i", $offsetStart);

			$args['EventEndDate'] = date("Y-m-d", $offsetEnd);
			$args['EventEndHour'] = date("H", $offsetEnd);
			$args['EventEndMinute'] = date("i", $offsetEnd);

			$args['post_content'] = $event['description'];
			$args['Venue']['Venue'] = $event['location'];

			$args['post_status'] = "Publish";
			$args['post_type'] = "tribe_events";
			//$args['to_ping'] = $event['eid']; //damn you, sanitize_trackback_urls in 3.4
			$args['to_ping'] = 'https://www.facebook.com/events/'.$event['id'].'/';

			$inserting = $post_id = false;
			if (!array_key_exists($event['id'], $eids)) {
				//double check
				$already_exists = false;
				foreach($query->posts as $post) {
					if($post->to_ping == $args['to_ping'] || trim($post->pinged) == $args['to_ping']) {
						$already_exists = true;
					}
				}
				if(!$already_exists) {
					file_put_contents($_SERVER['DOCUMENT_ROOT'].'/fbevent.log', print_r(array(time(),'creating', $args, $eids, $query->posts),1)."\n".str_repeat('=',40)."\n", FILE_APPEND);
					$post_id = tribe_create_event($args);
					echo "<br />Inserting: ".$post_id;
					$inserting = true;
				}
			}
			if(!$inserting) {
				$post_id = $eids[$event['id']];
				echo "$post_id";
				tribe_update_event($post_id, $args);
				echo "<br />Updating: ".$eids[$event['id']];
			}
			if($post_id)
				update_metadata('post', $post_id, 'fb_event_obj', $event);
				//eid, name, start_time, end_time, location, description
		}
		if($eids)
			reset($eids);
	}
}

function fbes_options_page() {

	$fbes_api_uids = array();

	#Get option values
	$fbes_api_key = get_option('fbes_api_key');
	$fbes_api_secret = get_option('fbes_api_secret');
	$fbes_api_uid = get_option('fbes_api_uid');
	$fbes_api_uids = get_option('fbes_api_uids');
	$fbes_frequency = get_option('fbes_frequency');

	#Get new updated option values, and save them
	if( !empty($_POST['update']) ) {

		$fbes_api_key = $_POST['fbes_api_key'];
		update_option('fbes_api_key', $fbes_api_key);

		$fbes_api_secret = $_POST['fbes_api_secret'];
		update_option('fbes_api_secret', $fbes_api_secret);

		$fbes_api_uid = $_POST['fbes_api_uid'];
		update_option('fbes_api_uid', $fbes_api_uid);

		$fbes_frequency = $_POST['fbes_frequency'];
		update_option('fbes_frequency', $fbes_frequency);

		$events = fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_access_token, $fbes_api_uids);
	//	$events = fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_api_uids);

		update_schedule($fbes_frequency);

		$msg = "Syncronization of Events from Facebook Complete.";
?>
		<div id="message" class="updated fade"><p><strong><?php echo $msg; ?></strong></p></div>
<?php
	} elseif( !empty($_POST['add-uid']) ) {

		if(!in_array($_POST['fbes_api_uid'], $fbes_api_uids)) {
			$fbes_api_uids[] = $_POST['fbes_api_uid'];
			update_option('fbes_api_uids', $fbes_api_uids);
		}

	} elseif( !empty($_GET['r']) ) {

		foreach ($fbes_api_uids as $key => $value)
			if($fbes_api_uids[$key] == $_GET['r'])
				unset($fbes_api_uids[$key]);

		update_option('fbes_api_uids', $fbes_api_uids);
	}

	require_once 'facebook-php-sdk/facebook.php'; //modified

	$facebook = new Facebook(array(
		'appId'  =>  $fbes_api_key,
		'secret' =>  $fbes_api_secret,
		'cookie' => true,
	));
	$facebook->setAccessToken($fbes_access_token);

	$events = fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_access_token, $fbes_api_uids);
	echo "<pre>".json_encode($events, JSON_PRETTY_PRINT)."</pre>";
?>
	<div class="wrap">
	 	<br /><div class="icon32" id="icon-plugins"><br/></div>
		<h2 style="margin-bottom:10px;">Sync Facebook Events</h2>
		<form method="post" action="<?php echo $_SERVER['REQUEST_URI'] ?>">
		<input type="hidden" name="update" />
		<?php
		echo '<form action="'. $_SERVER["REQUEST_URI"] .'" method="post"><table style="width:475px;">';
		echo '<tr><td>Facebook App ID:</td><td><input type="text" id="fbes_api_key" name="fbes_api_key" value="'.htmlentities($fbes_api_key).'" size="35" /></td><tr>';
		echo '<tr><td>Facebook App Secret:</td><td><input type="text" id="fbes_api_secret" name="fbes_api_secret" value="'.htmlentities($fbes_api_secret) .'" size="35" /></td><tr>';

		echo '<tr><td>Update Fequency:</td><td><select id="fbes_frequency" name="fbes_frequency">';
		if(htmlentities($fbes_frequency)=="daily") {
			echo '<option value="daily" SELECTED>Daily</option>';
		} else {
			echo '<option value="daily">Daily</option>';
		}
		if(htmlentities($fbes_frequency)=="twicedaily") {
			echo '<option value="twicedaily" SELECTED>Twice Daily</option>';
		} else {
			echo '<option value="twicedaily">Twice Daily</option>';
		}
		if(htmlentities($fbes_frequency)=="hourly") {
			echo '<option value="hourly" SELECTED>Hourly</option>';
		} else {
			echo '<option value="hourly">Hourly</option>';
		}
		echo '</select>';

		echo '<tr><td>Add Facebook Page UID:</td><td><input type="text" id="fbes_api_uid" name="fbes_api_uid" value="" size="15" />';
		echo '<input type="submit" value="Add" class="button-secondary" name="add-uid" /></td></tr>';

		echo '<tr><td style="vertical-align:top;"></td><td>';

		foreach ($fbes_api_uids as $value) {
			if($value!='')
		    	echo '&nbsp;&nbsp;'.$value.'&nbsp;&nbsp;<a href="'.$_SERVER["REQUEST_URI"].'&r='.$value.'">remove</a><br />';
		}

		echo '</td></tr>';

		echo '<tr><td colspan="2"></td></tr><tr><td colspan="2"><br /><input type="submit" value="Update" class="button-primary"';
		echo ' name="update" /></td></tr></table>';
		?>
		</form>
		<?php
		  $code = $_REQUEST["code"];
		  if(!empty($code)){
		    update_option('fbes_access_token', $facebook->getAccessToken());
		  }
		  else if(!get_option('fbes_access_token')){
			  $params = array(
			    'scope'        => 'manage_pages',
			    'redirect_uri' => curPageURL()
			  );
			  $loginUrl = $facebook->getLoginUrl($params);
			  echo "<a href='$loginUrl'>Authorize Facebook</a>";
			}
		?>
	</div>
	<?php if(isset($events)) { ?>
		<div style="margin-top:20px;font-size:14px;color:#444;border:1px solid #999;padding:15px;width:95%;font-face:couriernew;">
		<span style="color:red;">Updaing all facebook events...</span><br />
		<?php fbes_send_events($events); ?><br />
		<span style="color:red;">Events Calendar updated with current Facebook events.</span><br /><br />
		</div>
	<?php } ?>
<?php
}

function curPageURL() {
 $pageURL = 'http';
 if ($_SERVER["HTTPS"] == "on") {$pageURL .= "s";}
 $pageURL .= "://";
 if ($_SERVER["SERVER_PORT"] != "80") {
  $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
 } else {
  $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];
 }
 return $pageURL;
}
?>