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THEtheChad 9 years ago
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82942b64b9
  1. 963
      facebook.php
  2. 85
      readme.txt
  3. BIN
      screenshot-1.png
  4. 292
      sync-facebook-events.php

963
facebook.php

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<?php
if (!function_exists('curl_init')) {
throw new Exception('Facebook needs the CURL PHP extension.');
}
if (!function_exists('json_decode')) {
throw new Exception('Facebook needs the JSON PHP extension.');
}
/**
* Thrown when an API call returns an exception.
*
* @author Naitik Shah <naitik@facebook.com>
*/
class FacebookApiException extends Exception
{
/**
* The result from the API server that represents the exception information.
*/
protected $result;
/**
* Make a new API Exception with the given result.
*
* @param Array $result the result from the API server
*/
public function __construct($result) {
$this->result = $result;
$code = isset($result['error_code']) ? $result['error_code'] : 0;
if (isset($result['error_description'])) {
// OAuth 2.0 Draft 10 style
$msg = $result['error_description'];
} else if (isset($result['error']) && is_array($result['error'])) {
// OAuth 2.0 Draft 00 style
$msg = $result['error']['message'];
} else if (isset($result['error_msg'])) {
// Rest server style
$msg = $result['error_msg'];
} else {
$msg = 'Unknown Error. Check getResult()';
}
parent::__construct($msg, $code);
}
/**
* Return the associated result object returned by the API server.
*
* @returns Array the result from the API server
*/
public function getResult() {
return $this->result;
}
/**
* Returns the associated type for the error. This will default to
* 'Exception' when a type is not available.
*
* @return String
*/
public function getType() {
if (isset($this->result['error'])) {
$error = $this->result['error'];
if (is_string($error)) {
// OAuth 2.0 Draft 10 style
return $error;
} else if (is_array($error)) {
// OAuth 2.0 Draft 00 style
if (isset($error['type'])) {
return $error['type'];
}
}
}
return 'Exception';
}
/**
* To make debugging easier.
*
* @returns String the string representation of the error
*/
public function __toString() {
$str = $this->getType() . ': ';
if ($this->code != 0) {
$str .= $this->code . ': ';
}
return $str . $this->message;
}
}
/**
* Provides access to the Facebook Platform.
*
* @author Naitik Shah <naitik@facebook.com>
*/
class Facebook
{
/**
* Version.
*/
const VERSION = '2.1.2';
/**
* Default options for curl.
*/
public static $CURL_OPTS = array(
CURLOPT_CONNECTTIMEOUT => 10,
CURLOPT_RETURNTRANSFER => true,
CURLOPT_TIMEOUT => 60,
CURLOPT_USERAGENT => 'facebook-php-2.0',
);
/**
* List of query parameters that get automatically dropped when rebuilding
* the current URL.
*/
protected static $DROP_QUERY_PARAMS = array(
'session',
'signed_request',
);
/**
* Maps aliases to Facebook domains.
*/
public static $DOMAIN_MAP = array(
'api' => 'https://api.facebook.com/',
'api_read' => 'https://api-read.facebook.com/',
'graph' => 'https://graph.facebook.com/',
'www' => 'https://www.facebook.com/',
);
/**
* The Application ID.
*/
protected $appId;
/**
* The Application API Secret.
*/
protected $apiSecret;
/**
* The active user session, if one is available.
*/
protected $session;
/**
* The data from the signed_request token.
*/
protected $signedRequest;
/**
* Indicates that we already loaded the session as best as we could.
*/
protected $sessionLoaded = false;
/**
* Indicates if Cookie support should be enabled.
*/
protected $cookieSupport = false;
/**
* Base domain for the Cookie.
*/
protected $baseDomain = '';
/**
* Indicates if the CURL based @ syntax for file uploads is enabled.
*/
protected $fileUploadSupport = false;
/**
* Initialize a Facebook Application.
*
* The configuration:
* - appId: the application ID
* - secret: the application secret
* - cookie: (optional) boolean true to enable cookie support
* - domain: (optional) domain for the cookie
* - fileUpload: (optional) boolean indicating if file uploads are enabled
*
* @param Array $config the application configuration
*/
public function __construct($config) {
$this->setAppId($config['appId']);
$this->setApiSecret($config['secret']);
if (isset($config['cookie'])) {
$this->setCookieSupport($config['cookie']);
}
if (isset($config['domain'])) {
$this->setBaseDomain($config['domain']);
}
if (isset($config['fileUpload'])) {
$this->setFileUploadSupport($config['fileUpload']);
}
}
/**
* Set the Application ID.
*
* @param String $appId the Application ID
*/
public function setAppId($appId) {
$this->appId = $appId;
return $this;
}
/**
* Get the Application ID.
*
* @return String the Application ID
*/
public function getAppId() {
return $this->appId;
}
/**
* Set the API Secret.
*
* @param String $appId the API Secret
*/
public function setApiSecret($apiSecret) {
$this->apiSecret = $apiSecret;
return $this;
}
/**
* Get the API Secret.
*
* @return String the API Secret
*/
public function getApiSecret() {
return $this->apiSecret;
}
/**
* Set the Cookie Support status.
*
* @param Boolean $cookieSupport the Cookie Support status
*/
public function setCookieSupport($cookieSupport) {
$this->cookieSupport = $cookieSupport;
return $this;
}
/**
* Get the Cookie Support status.
*
* @return Boolean the Cookie Support status
*/
public function useCookieSupport() {
return $this->cookieSupport;
}
/**
* Set the base domain for the Cookie.
*
* @param String $domain the base domain
*/
public function setBaseDomain($domain) {
$this->baseDomain = $domain;
return $this;
}
/**
* Get the base domain for the Cookie.
*
* @return String the base domain
*/
public function getBaseDomain() {
return $this->baseDomain;
}
/**
* Set the file upload support status.
*
* @param String $domain the base domain
*/
public function setFileUploadSupport($fileUploadSupport) {
$this->fileUploadSupport = $fileUploadSupport;
return $this;
}
/**
* Get the file upload support status.
*
* @return String the base domain
*/
public function useFileUploadSupport() {
return $this->fileUploadSupport;
}
/**
* Get the data from a signed_request token
*
* @return String the base domain
*/
public function getSignedRequest() {
if (!$this->signedRequest) {
if (isset($_REQUEST['signed_request'])) {
$this->signedRequest = $this->parseSignedRequest(
$_REQUEST['signed_request']);
}
}
return $this->signedRequest;
}
/**
* Set the Session.
*
* @param Array $session the session
* @param Boolean $write_cookie indicate if a cookie should be written. this
* value is ignored if cookie support has been disabled.
*/
public function setSession($session=null, $write_cookie=true) {
$session = $this->validateSessionObject($session);
$this->sessionLoaded = true;
$this->session = $session;
if ($write_cookie) {
$this->setCookieFromSession($session);
}
return $this;
}
/**
* Get the session object. This will automatically look for a signed session
* sent via the signed_request, Cookie or Query Parameters if needed.
*
* @return Array the session
*/
public function getSession() {
if (!$this->sessionLoaded) {
$session = null;
$write_cookie = true;
// try loading session from signed_request in $_REQUEST
$signedRequest = $this->getSignedRequest();
if ($signedRequest) {
// sig is good, use the signedRequest
$session = $this->createSessionFromSignedRequest($signedRequest);
}
// try loading session from $_REQUEST
if (!$session && isset($_REQUEST['session'])) {
$session = json_decode(
get_magic_quotes_gpc()
? stripslashes($_REQUEST['session'])
: $_REQUEST['session'],
true
);
$session = $this->validateSessionObject($session);
}
// try loading session from cookie if necessary
if (!$session && $this->useCookieSupport()) {
$cookieName = $this->getSessionCookieName();
if (isset($_COOKIE[$cookieName])) {
$session = array();
parse_str(trim(
get_magic_quotes_gpc()
? stripslashes($_COOKIE[$cookieName])
: $_COOKIE[$cookieName],
'"'
), $session);
$session = $this->validateSessionObject($session);
// write only if we need to delete a invalid session cookie
$write_cookie = empty($session);
}
}
$this->setSession($session, $write_cookie);
}
return $this->session;
}
/**
* Get the UID from the session.
*
* @return String the UID if available
*/
public function getUser() {
$session = $this->getSession();
return $session ? $session['uid'] : null;
}
/**
* Gets a OAuth access token.
*
* @return String the access token
*/
public function getAccessToken() {
$session = $this->getSession();
// either user session signed, or app signed
if ($session) {
return $session['access_token'];
} else {
return $this->getAppId() .'|'. $this->getApiSecret();
}
}
/**
* Get a Login URL for use with redirects. By default, full page redirect is
* assumed. If you are using the generated URL with a window.open() call in
* JavaScript, you can pass in display=popup as part of the $params.
*
* The parameters:
* - next: the url to go to after a successful login
* - cancel_url: the url to go to after the user cancels
* - req_perms: comma separated list of requested extended perms
* - display: can be "page" (default, full page) or "popup"
*
* @param Array $params provide custom parameters
* @return String the URL for the login flow
*/
public function getLoginUrl($params=array()) {
$currentUrl = $this->getCurrentUrl();
return $this->getUrl(
'www',
'login.php',
array_merge(array(
'api_key' => $this->getAppId(),
'cancel_url' => $currentUrl,
'display' => 'page',
'fbconnect' => 1,
'next' => $currentUrl,
'return_session' => 1,
'session_version' => 3,
'v' => '1.0',
), $params)
);
}
/**
* Get a Logout URL suitable for use with redirects.
*
* The parameters:
* - next: the url to go to after a successful logout
*
* @param Array $params provide custom parameters
* @return String the URL for the logout flow
*/
public function getLogoutUrl($params=array()) {
return $this->getUrl(
'www',
'logout.php',
array_merge(array(
'next' => $this->getCurrentUrl(),
'access_token' => $this->getAccessToken(),
), $params)
);
}
/**
* Get a login status URL to fetch the status from facebook.
*
* The parameters:
* - ok_session: the URL to go to if a session is found
* - no_session: the URL to go to if the user is not connected
* - no_user: the URL to go to if the user is not signed into facebook
*
* @param Array $params provide custom parameters
* @return String the URL for the logout flow
*/
public function getLoginStatusUrl($params=array()) {
return $this->getUrl(
'www',
'extern/login_status.php',
array_merge(array(
'api_key' => $this->getAppId(),
'no_session' => $this->getCurrentUrl(),
'no_user' => $this->getCurrentUrl(),
'ok_session' => $this->getCurrentUrl(),
'session_version' => 3,
), $params)
);
}
/**
* Make an API call.
*
* @param Array $params the API call parameters
* @return the decoded response
*/
public function api(/* polymorphic */) {
$args = func_get_args();
if (is_array($args[0])) {
return $this->_restserver($args[0]);
} else {
return call_user_func_array(array($this, '_graph'), $args);
}
}
/**
* Invoke the old restserver.php endpoint.
*
* @param Array $params method call object
* @return the decoded response object
* @throws FacebookApiException
*/
protected function _restserver($params) {
// generic application level parameters
$params['api_key'] = $this->getAppId();
$params['format'] = 'json-strings';
$result = json_decode($this->_oauthRequest(
$this->getApiUrl($params['method']),
$params
), true);
// results are returned, errors are thrown
if (is_array($result) && isset($result['error_code'])) {
throw new FacebookApiException($result);
}
return $result;
}
/**
* Invoke the Graph API.
*
* @param String $path the path (required)
* @param String $method the http method (default 'GET')
* @param Array $params the query/post data
* @return the decoded response object
* @throws FacebookApiException
*/
protected function _graph($path, $method='GET', $params=array()) {
if (is_array($method) && empty($params)) {
$params = $method;
$method = 'GET';
}
$params['method'] = $method; // method override as we always do a POST
$result = json_decode($this->_oauthRequest(
$this->getUrl('graph', $path),
$params
), true);
// results are returned, errors are thrown
if (is_array($result) && isset($result['error'])) {
$e = new FacebookApiException($result);
switch ($e->getType()) {
// OAuth 2.0 Draft 00 style
case 'OAuthException':
// OAuth 2.0 Draft 10 style
case 'invalid_token':
$this->setSession(null);
}
throw $e;
}
return $result;
}
/**
* Make a OAuth Request
*
* @param String $path the path (required)
* @param Array $params the query/post data
* @return the decoded response object
* @throws FacebookApiException
*/
protected function _oauthRequest($url, $params) {
if (!isset($params['access_token'])) {
$params['access_token'] = $this->getAccessToken();
}
// json_encode all params values that are not strings
foreach ($params as $key => $value) {
if (!is_string($value)) {
$params[$key] = json_encode($value);
}
}
return $this->makeRequest($url, $params);
}
/**
* Makes an HTTP request. This method can be overriden by subclasses if
* developers want to do fancier things or use something other than curl to
* make the request.
*
* @param String $url the URL to make the request to
* @param Array $params the parameters to use for the POST body
* @param CurlHandler $ch optional initialized curl handle
* @return String the response text
*/
protected function makeRequest($url, $params, $ch=null) {
if (!$ch) {
$ch = curl_init();
}
$opts = self::$CURL_OPTS;
if ($this->useFileUploadSupport()) {
$opts[CURLOPT_POSTFIELDS] = $params;
} else {
$opts[CURLOPT_POSTFIELDS] = http_build_query($params, null, '&');
}
$opts[CURLOPT_URL] = $url;
// disable the 'Expect: 100-continue' behaviour. This causes CURL to wait
// for 2 seconds if the server does not support this header.
if (isset($opts[CURLOPT_HTTPHEADER])) {
$existing_headers = $opts[CURLOPT_HTTPHEADER];
$existing_headers[] = 'Expect:';
$opts[CURLOPT_HTTPHEADER] = $existing_headers;
} else {
$opts[CURLOPT_HTTPHEADER] = array('Expect:');
}
curl_setopt_array($ch, $opts);
$result = curl_exec($ch);
if (curl_errno($ch) == 60) { // CURLE_SSL_CACERT
self::errorLog('Invalid or no certificate authority found, using bundled information');
curl_setopt($ch, CURLOPT_CAINFO,
dirname(__FILE__) . '/fb_ca_chain_bundle.crt');
$result = curl_exec($ch);
}
if ($result === false) {
$e = new FacebookApiException(array(
'error_code' => curl_errno($ch),
'error' => array(
'message' => curl_error($ch),
'type' => 'CurlException',
),
));
curl_close($ch);
throw $e;
}
curl_close($ch);
return $result;
}
/**
* The name of the Cookie that contains the session.
*
* @return String the cookie name
*/
protected function getSessionCookieName() {
return 'fbs_' . $this->getAppId();
}
/**
* Set a JS Cookie based on the _passed in_ session. It does not use the
* currently stored session -- you need to explicitly pass it in.
*
* @param Array $session the session to use for setting the cookie
*/
protected function setCookieFromSession($session=null) {
if (!$this->useCookieSupport()) {
return;
}
$cookieName = $this->getSessionCookieName();
$value = 'deleted';
$expires = time() - 3600;
$domain = $this->getBaseDomain();
if ($session) {
$value = '"' . http_build_query($session, null, '&') . '"';
if (isset($session['base_domain'])) {
$domain = $session['base_domain'];
}
$expires = $session['expires'];
}
// prepend dot if a domain is found
if ($domain) {
$domain = '.' . $domain;
}
// if an existing cookie is not set, we dont need to delete it
if ($value == 'deleted' && empty($_COOKIE[$cookieName])) {
return;
}
if (headers_sent()) {
self::errorLog('Could not set cookie. Headers already sent.');
// ignore for code coverage as we will never be able to setcookie in a CLI
// environment
// @codeCoverageIgnoreStart
} else {
setcookie($cookieName, $value, $expires, '/', $domain);
}
// @codeCoverageIgnoreEnd
}
/**
* Validates a session_version=3 style session object.
*
* @param Array $session the session object
* @return Array the session object if it validates, null otherwise
*/
protected function validateSessionObject($session) {
// make sure some essential fields exist
if (is_array($session) &&
isset($session['uid']) &&
isset($session['access_token']) &&
isset($session['sig'])) {
// validate the signature
$session_without_sig = $session;
unset($session_without_sig['sig']);
$expected_sig = self::generateSignature(
$session_without_sig,
$this->getApiSecret()
);
if ($session['sig'] != $expected_sig) {
self::errorLog('Got invalid session signature in cookie.');
$session = null;
}
// check expiry time
} else {
$session = null;
}
return $session;
}
/**
* Returns something that looks like our JS session object from the
* signed token's data
*
* TODO: Nuke this once the login flow uses OAuth2
*
* @param Array the output of getSignedRequest
* @return Array Something that will work as a session
*/
protected function createSessionFromSignedRequest($data) {
if (!isset($data['oauth_token'])) {
return null;
}
$session = array(
'uid' => $data['user_id'],
'access_token' => $data['oauth_token'],
'expires' => $data['expires'],
);
// put a real sig, so that validateSignature works
$session['sig'] = self::generateSignature(
$session,
$this->getApiSecret()
);
return $session;
}
/**
* Parses a signed_request and validates the signature.
* Then saves it in $this->signed_data
*
* @param String A signed token
* @param Boolean Should we remove the parts of the payload that
* are used by the algorithm?
* @return Array the payload inside it or null if the sig is wrong
*/
protected function parseSignedRequest($signed_request) {
list($encoded_sig, $payload) = explode('.', $signed_request, 2);
// decode the data
$sig = self::base64UrlDecode($encoded_sig);
$data = json_decode(self::base64UrlDecode($payload), true);
if (strtoupper($data['algorithm']) !== 'HMAC-SHA256') {
self::errorLog('Unknown algorithm. Expected HMAC-SHA256');
return null;
}
// check sig
$expected_sig = hash_hmac('sha256', $payload,
$this->getApiSecret(), $raw = true);
if ($sig !== $expected_sig) {
self::errorLog('Bad Signed JSON signature!');
return null;
}
return $data;
}
/**
* Build the URL for api given parameters.
*
* @param $method String the method name.
* @return String the URL for the given parameters
*/
protected function getApiUrl($method) {
static $READ_ONLY_CALLS =
array('admin.getallocation' => 1,
'admin.getappproperties' => 1,
'admin.getbannedusers' => 1,
'admin.getlivestreamvialink' => 1,
'admin.getmetrics' => 1,
'admin.getrestrictioninfo' => 1,
'application.getpublicinfo' => 1,
'auth.getapppublickey' => 1,
'auth.getsession' => 1,
'auth.getsignedpublicsessiondata' => 1,
'comments.get' => 1,
'connect.getunconnectedfriendscount' => 1,
'dashboard.getactivity' => 1,
'dashboard.getcount' => 1,
'dashboard.getglobalnews' => 1,
'dashboard.getnews' => 1,
'dashboard.multigetcount' => 1,
'dashboard.multigetnews' => 1,
'data.getcookies' => 1,
'events.get' => 1,
'events.getmembers' => 1,
'fbml.getcustomtags' => 1,
'feed.getappfriendstories' => 1,
'feed.getregisteredtemplatebundlebyid' => 1,
'feed.getregisteredtemplatebundles' => 1,
'fql.multiquery' => 1,
'fql.query' => 1,
'friends.arefriends' => 1,
'friends.get' => 1,
'friends.getappusers' => 1,
'friends.getlists' => 1,
'friends.getmutualfriends' => 1,
'gifts.get' => 1,
'groups.get' => 1,
'groups.getmembers' => 1,
'intl.gettranslations' => 1,
'links.get' => 1,
'notes.get' => 1,
'notifications.get' => 1,
'pages.getinfo' => 1,
'pages.isadmin' => 1,
'pages.isappadded' => 1,
'pages.isfan' => 1,
'permissions.checkavailableapiaccess' => 1,
'permissions.checkgrantedapiaccess' => 1,
'photos.get' => 1,
'photos.getalbums' => 1,
'photos.gettags' => 1,
'profile.getinfo' => 1,
'profile.getinfooptions' => 1,
'stream.get' => 1,
'stream.getcomments' => 1,
'stream.getfilters' => 1,
'users.getinfo' => 1,
'users.getloggedinuser' => 1,
'users.getstandardinfo' => 1,
'users.hasapppermission' => 1,
'users.isappuser' => 1,
'users.isverified' => 1,
'video.getuploadlimits' => 1);
$name = 'api';
if (isset($READ_ONLY_CALLS[strtolower($method)])) {
$name = 'api_read';
}
return self::getUrl($name, 'restserver.php');
}
/**
* Build the URL for given domain alias, path and parameters.
*
* @param $name String the name of the domain
* @param $path String optional path (without a leading slash)
* @param $params Array optional query parameters
* @return String the URL for the given parameters
*/
protected function getUrl($name, $path='', $params=array()) {
$url = self::$DOMAIN_MAP[$name];
if ($path) {
if ($path[0] === '/') {
$path = substr($path, 1);
}
$url .= $path;
}
if ($params) {
$url .= '?' . http_build_query($params, null, '&');
}
return $url;
}
/**
* Returns the Current URL, stripping it of known FB parameters that should
* not persist.
*
* @return String the current URL
*/
protected function getCurrentUrl() {
$protocol = isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on'
? 'https://'
: 'http://';
$currentUrl = $protocol . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'];
$parts = parse_url($currentUrl);
// drop known fb params
$query = '';
if (!empty($parts['query'])) {
$params = array();
parse_str($parts['query'], $params);
foreach(self::$DROP_QUERY_PARAMS as $key) {
unset($params[$key]);
}
if (!empty($params)) {
$query = '?' . http_build_query($params, null, '&');
}
}
// use port if non default
$port =
isset($parts['port']) &&
(($protocol === 'http://' && $parts['port'] !== 80) ||
($protocol === 'https://' && $parts['port'] !== 443))
? ':' . $parts['port'] : '';
// rebuild
return $protocol . $parts['host'] . $port . $parts['path'] . $query;
}
/**
* Generate a signature for the given params and secret.
*
* @param Array $params the parameters to sign
* @param String $secret the secret to sign with
* @return String the generated signature
*/
protected static function generateSignature($params, $secret) {
// work with sorted data
ksort($params);
// generate the base string
$base_string = '';
foreach($params as $key => $value) {
$base_string .= $key . '=' . $value;
}
$base_string .= $secret;
return md5($base_string);
}
/**
* Prints to the error log if you aren't in command line mode.
*
* @param String log message
*/
protected static function errorLog($msg) {
// disable error log if we are running in a CLI environment
// @codeCoverageIgnoreStart
if (php_sapi_name() != 'cli') {
error_log($msg);
}
// uncomment this if you want to see the errors on the page
// print 'error_log: '.$msg."\n";
// @codeCoverageIgnoreEnd
}
/**
* Base64 encoding that doesn't need to be urlencode()ed.
* Exactly the same as base64_encode except it uses
* - instead of +
* _ instead of /
*
* @param String base64UrlEncodeded string
*/
protected static function base64UrlDecode($input) {
return base64_decode(strtr($input, '-_', '+/'));
}
}

85
readme.txt

@ -0,0 +1,85 @@
=== Sync Facebook Events ===
Contributors: markpdxt, scottconnerly
Tags: facebook, events, synchronize, calendar
Requires at least: 3.0
Tested up to: 3.4.2
Stable tag: 1.0.8
A simple plugin to Sync Facebook events to The Events Calendar plugin by Modern Tribe.
== Description ==
A simple plugin to Sync Facebook events to The Events Calendar plugin by Modern Tribe.
Get The Events Calendar plugin:
http://wordpress.org/extend/plugins/the-events-calendar/
== Installation ==
1. Download the plugin archive and expand it
2. Upload the sync-facebook-events folder to your /wp-content/plugins/ directory
3. Go to the plugins page and click 'Activate' for Sync FB Events
4. Navigate to the Settings section within Wordpress and enter your Facebook App ID, App Secret & UID.
5. Ensure The Events Calendar plugin is installed and configured - http://wordpress.org/extend/plugins/the-events-calendar/
5. Press 'Update' to synchronize your current Facebook events for display within The Events Calendar.
6. Synchronization will continue to occur on the schedule you set. You can always update manually if/when needed.
== Frequently Asked Questions ==
Q: What is the Facebook App ID and App Secret, and why are they required?
A: The Facebook App ID and App Secret are required by Facebook to access data via the Facebook graph API.
To signup for a developer account or learn more see - http://developers.facebook.com/docs/guides/canvas/
Q: How do I find the Facebook UID of the page for which I wish to synchronize events?
A: Goto the page you're interested in - ex. https://www.facebook.com/webtrends
Copy the URL and replace 'www' with 'graph' - ex. https://graph.facebook.com/webtrends
The UID is the first item in the resulting text. In this example it is "54905721286".
Q: Do my Facebook events get updated on a schedule?
A: Yes, You can choose the update interval and also update immediately when you press the 'Update' button from the Sync FB Events section within settings.
Q: Why do I get a blank screen when running an update?
A: Check your Facebook App ID, Facebook App Secret and Facebook UID. One of them is probably incorrect.
Q: Why doesn't Modern Tribe just provide this functionality within their own plugin?
A: They incorporated this one, actually.
== Upgrade Notice ==
Upgrade Notice
== Screenshots ==
1. Facebook Event Sync Configuration
== Changelog ==
= 1.0.7 / 1.0.8 =
* Fixing the duplicate events issue (finally).
= 1.0.6 =
* Adding the correct post_type for modern tribe events
= 1.0.5 =
* Minor compatibility fix for Wordpress 3.1
= 1.0.4 =
* Added ability to allow event synchronization from multiple Facebook pages
= 1.0.3 =
* Added ability to adjust event sync frequency
= 1.0.2 =
* Added automatic daily event sync
* Added ability to adjust event timezone to WordPress
= 1.0.1 =
* Improved update display
= 1.0 =
* Initial release

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<?php
/*
Plugin Name: Sync Facebook Events
Plugin URI: http://pdxt.com
Description: Sync Facebook Events to The Events Calendar Plugin
Author: Mark Nelson
Version: 1.0.6
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');
$events = fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_api_uids);
fbes_send_events($events);
}
function fbes_get_events($fbes_api_key, $fbes_api_secret, $fbes_api_uids) {
require 'facebook.php';
$facebook = new Facebook(array(
'appId' => $fbes_api_key,
'secret' => $fbes_api_secret,
'cookie' => true,
));
$ret = array();
foreach ($fbes_api_uids as $key => $value) {
if($value!='') {
//https://developers.facebook.com/docs/reference/fql/event/
$fql = "SELECT eid, name, start_time, end_time, location, description
FROM event WHERE eid IN ( SELECT eid FROM event_member WHERE uid = $value )
ORDER BY start_time desc";
$param = array(
'method' => 'fql.query',
'query' => $fql,
'callback' => ''
);
$result = $facebook->api($param);
foreach($result as $k => $v)
$result[$k]['uid'] = $value;
$ret = array_merge($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) {
$query = new WP_Query(array(
'post_type'=>'tribe_events',
'posts_per_page'=>'-1'
));
foreach($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($offsetEnd > time()) {
$args['EventStartDate'] = date("m/d/Y", $offsetStart);
$args['EventStartHour'] = date("H", $offsetStart);
$args['EventStartMinute'] = date("i", $offsetStart);
$args['EventEndDate'] = date("m/d/Y", $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['eid'].'/';
if($args['EventStartHour'] == '22' && $event['uid'] == '256763181050120') { //why are UT events 2 hours off???
$args['EventStartHour'] = '20';
$args['EventEndHour'] = '22';
$args['EventEndDate'] = date('m/d/Y',strtotime($args['EventEndDate'], '-1 day'));
}
$inserting = $post_id = false;
if (!array_key_exists($event['eid'], $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['eid']];
tribe_update_event($post_id, $args);
echo "<br />Updating: ".$eids[$event['eid']];
}
if($post_id)
update_metadata('post', $post_id, 'fb_event_obj', $event);
//eid, name, start_time, end_time, location, description
}
reset($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, $fbes_api_uids);
update_schedule($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);
}
?>
<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='.$value.'">remove</a><br />';
}
echo '</td></tr>';
echo '<tr><td colspan="2"></td></tr><tr><td colspan="2"><br /><input type="submit" value="Update" class="button-primary"';
echo ' name="update" /></td></tr></table>';
?>
</form>
</div>
<?php if(isset($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
}
?>