<?php
class Eventbrite {
/**
* Eventbrite API endpoint
*/
var $api_endpoint = "https://www.eventbrite.com/json/";
var $auth_tokens;
var $api_url;
/**
* Eventbrite API key (REQUIRED)
* http://www.eventbrite.com/api/key/
* Eventbrite user_key (OPTIONAL, only needed for reading/writing private user data)
* http://www.eventbrite.com/userkeyapi
*
* Alternate authorization parameters (instead of user_key):
* Eventbrite user email
* Eventbrite user password
*/
function __construct( $tokens = null, $user = null, $password = null ) {
$this->api_url = parse_url($this->api_endpoint);
$this->auth_tokens = array();
if(is_array($tokens)){
if(array_key_exists('access_code', $tokens)){
$this->auth_tokens = $this->oauth_handshake( $tokens );
}else{
$this->auth_tokens = $tokens;
}
}else{
$this->auth_tokens['app_key'] = $tokens;
if( $password ){
$this->auth_tokens['user'] = $user;
$this->auth_tokens['password'] = $password;
}
else {
$this->auth_tokens['user_key'] = $user;
}
}
}
function oauth_handshake( $tokens ){
$params = array(
'grant_type'=>'authorization_code',
'client_id'=> $tokens['app_key'],
'client_secret'=> $tokens['client_secret'],
'code'=> $tokens['access_code'] );
$request_url = $this->api_url['scheme'] . "://" . $this->api_url['host'] . '/oauth/token';
// TODO: Replace the cURL code with something a bit more modern -
//$context = stream_context_create(array('http' => array(
// 'method' => 'POST',
// 'header' => "Content-type: application/x-www-form-urlencoded\r\n",
// 'content' => http_build_query($params))));
//$json_data = file_get_contents( $request_url, false, $context );
// CURL-POST implementation -
// WARNING: This code may require you to install the php5-curl package
$ch = curl_init();
curl_setopt($ch, CURLOPT_POST, TRUE);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($params));
curl_setopt($ch, CURLOPT_URL, $request_url);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
$json_data = curl_exec($ch);
$resp_info = curl_getinfo($ch);
curl_close($ch);
$response = get_object_vars(json_decode($json_data));
if( !array_key_exists('access_token', $response) || array_key_exists('error', $response) ){
throw new Exception( $response['error_description'] );
}
return array_merge($tokens, $response);
}
// For information about available API methods, see: http://developer.eventbrite.com/doc/
function __call( $method, $args ) {
// Unpack our arguments
if( is_array( $args ) && array_key_exists( 0, $args ) && is_array( $args[0]) ){
$params = $args[0];
}else{
$params = array();
}
// Add authentication tokens to querystring
if(!isset($this->auth_tokens['access_token'])){
$params = array_merge($params, $this->auth_tokens);
}
// Build our request url, urlencode querystring params
$request_url = $this->api_url['scheme']."://".$this->api_url['host'].$this->api_url['path'].$method.'?'.http_build_query( $params,'','&');
// Call the API
if(!isset($this->auth_tokens['access_token'])){
$resp = file_get_contents( $request_url );
}else{
$options = array(
'http'=>array( 'method'=> 'GET',
'header'=> "Authorization: Bearer " . $this->auth_tokens['access_token'])
);
$resp = file_get_contents( $request_url, false, stream_context_create($options));
}
// parse our response
if($resp){
$resp = json_decode( $resp );
if( isset( $resp->error ) && isset($resp->error->error_message) ){
throw new Exception( $resp->error->error_message );
}
}
return $resp;
}
/*
* Helpers:
*/
public static function OAuthLogin($auth_tokens, $get_token='getAccessToken', $save_token='saveAccessToken', $delete_token='deleteAccessToken'){
$user = false;
$response = array();
# Attempt to authenticate this user using an access_token, if available
if(!isset($auth_tokens['access_token'])){
if(is_callable($get_token)){
$auth_tokens['access_token'] = $get_token();
}elseif(is_callable(array('self',$get_token))){
$auth_tokens['access_token'] = self::$get_token();
}
}
if( isset($auth_tokens['access_token']) ){
try{
// Example using an access_token to initialize the API client:
$eb = new Eventbrite(array('access_token' => $auth_tokens['access_token']));
$user = $eb->user_get()->user;
}catch(Exception $e){
$user = false;
// This token may no longer be valid
// refresh it, or clear it
$response['login_error'] = $e->getMessage();
if(is_callable($delete_token)){
$delete_token( $auth_tokens['access_token'] );
}elseif(is_callable(array('self',$delete_token))){
self::$delete_token( $auth_tokens['access_token'] );
}
}
}
# We do not have a valid access token for this user so far
if( $user == false ){
# This user is not yet authenticated -
# it is their first visit,
# or they are returning with an access_code that we will exchange for an access_token,
# or they were redirected here after logout
if( isset($auth_tokens['access_code']) ){
# This user has just authenticated, get their access token and store it
try{
$eb = new Eventbrite($auth_tokens );
$response['access_token'] = $eb->auth_tokens['access_token'];
// save this access_token for future use!
if(is_callable($save_token)){
$save_token( $response['access_token'] );
}elseif(is_callable(array('self',$save_token))){
self::$save_token( $response['access_token'] );
}
header('Location: ' . $_SERVER['PHP_SELF'] );
exit;
}catch (Exception $e){
$response['login_error'] = $e->getMessage();
}
}else if( isset($auth_tokens['error_message'] )){
if($auth_tokens['error_message'] == 'access_denied'){
$response['login_error'] = "Account access denied.";
}else{
$response['login_error'] = $auth_tokens['error_message'];
}
}
}else if(is_object($user)){
$response['user_email'] = $user->email;
$response['user_name'] = $user->first_name . ' ' . $user->last_name;
}
return $response;
}
public static function widgetHTML( $params ){
// Replace this example with something that works with your Application's templating engine
$html = "<div class='eb_login_widget'> <h2>Eventbrite Account Access</h2>";
if( isset($params['user_name']) && isset($params['user_email']) && isset($params['logout_link']) ){
$html .= "<div><h3>Welcome Back!</h3>";
$html .= "<p>You are logged in as:<br/>{$params['user_name']}<br/><i>({$params['user_email']})</i></p>";
$html .= "<p><a class='button' href='{$params['logout_link']}'>Logout</a></p></div>";
}elseif( isset($params['oauth_link']) ){
if(isset($params['login_error'])){
$html .= "<p class='error'>{$params['login_error']}</p>";
}
$html .= "<p><a class='button' href='{$params['oauth_link']}'>Login with Eventbrite</a></p></div>";
}else{
$html .= "<div><h2>Eventbrite widgetHTML template example fail :(</h2></div>";
}
$html .= "</div>";
return $html;
}
public static function oauthNextStep( $key ) {
return 'https://www.eventbrite.com/oauth/authorize?response_type=code&client_id='.$key;
}
public static function eventList($evnts= array(), $callback='eventListRow', $options=false) {
$html='<div class="eb_event_list">';
if( isset($evnts->events)){
foreach( $evnts->events as $evnt ){
if( isset($evnt->event ) ){
if(is_callable($callback)){
if($options){
$html .= $callback($evnt->event, $options);
}else{
$html .= $callback($evnt->event);
}
}else if(is_callable( array('self', $callback))){
if($options){
$html .= self::$callback($evnt->event, $options);
}else{
$html .= self::$callback($evnt->event);
}
}
}
}
}else{
$html .= "No events were found at this time.";
}
return $html . "</div>";
}
public static function getAccessToken( ) {
if(isset($_SESSION['EB_OAUTH_ACCESS_TOKEN'])){
return $_SESSION['EB_OAUTH_ACCESS_TOKEN'];
}else{
return null;
}
}
public static function saveAccessToken( $access_token ) {
// this function should save the existing user's access_token.
$_SESSION['EB_OAUTH_ACCESS_TOKEN'] = $access_token;
}
public static function deleteAccessToken( ) {
// this function should remove the existing user's access_token.
unset($_SESSION['EB_OAUTH_ACCESS_TOKEN']);
}
public static function eventListRow( $evnt ) {
$time = strtotime($evnt->start_date);
$venue_name = 'online';
if( isset($evnt->venue) && isset( $evnt->venue->name )){
$venue_name = $evnt->venue->name;
}
return "<div class='eb_event_list_item' id='evnt_div_" . $evnt->id ."'><span class='eb_event_list_date'>" . strftime('%a, %B %e', $time) . "</span><span class='eb_event_list_time'>" . strftime('%l:%M %P', $time) . "</span>" ."<a class='eb_event_list_title' href='".$evnt->url."'>".$evnt->title."</a><span class='eb_event_list_location'>" . $venue_name . "</span></div>\n";
}
/*
* Widgets:
*/
public static function loginWidget( $options, $get_token='getAccessToken', $save_token='saveAccessToken', $delete_token='deleteAccessToken', $render_login_box='widgetHTML' ){
if( ( isset($options['logout_link'])
&& $options['logout_link'] == $_SERVER['REQUEST_URI'] )
// TODO: add a way to disable this default:
|| ( isset($_GET['eb_logout'])
&& $_GET['eb_logout']=="true" )) {
// clear this user's access_token -
Eventbrite::deleteAccessToken();
// remove our "logout=true" trigger from the querystring-
header("Location: " . $_SERVER['PHP_SELF']);
exit;
}
// automatically pull the access_code from the querysting?
// TODO: add a way to disable this:
if(!isset($options['access_code'] )){
$options['access_code'] = isset($_REQUEST['code']) ? $_REQUEST['code'] : null;
}
// automatically grab errors from the querystring?
// TODO: add a way to disable this:
if(!isset($options['error_message'])){
$options['error_message'] = isset($_REQUEST['error']) ? $_REQUEST['error'] : null;
}
// Check to see if we have a valid user account
// and Proccess any data-related work:
$response = Eventbrite::OAuthLogin($options, $get_token, $save_token, $delete_token);
// package up the data for our view / template:
$login_params = array();
if( is_array($response)){
if( isset( $response['user_email']) ){
$login_params = array('user_name' => $response['user_name'],
'user_email' => $response['user_email']);
}
$login_params['oauth_link'] = Eventbrite::oauthNextStep($options['app_key']);
if(isset( $response['login_error'])){
$login_params['login_error'] = $response['login_error'];
}
if(isset( $options['logout_link'])){
$login_params['logout_link'] = $options['logout_link'];
}else{
$login_params['logout_link'] = $_SERVER['PHP_SELF'] . '?eb_logout=true';
}
}
// view related work:
// render your "template"
if(is_callable($render_login_box)){
return $render_login_box( $login_params );
}elseif(is_callable(array('self',$render_login_box))){
return self::$render_login_box( $login_params );
}else{
//the templating callback was not valid,
//return the raw data for use with an external template
return $login_params;
}
}
public static function ticketWidget( $evnt, $height='650px', $width='100%' ) {
return '<div style="width:100%; text-align:left;" ><iframe src="http://www.eventbrite.com/tickets-external?eid=' . $evnt->id . '&ref=etckt" frameborder="0" height="'.$height.'" width="'.$width.'" vspace="0" hspace="0" marginheight="5" marginwidth="5" scrolling="auto" allowtransparency="true"></iframe><div style="font-family:Helvetica, Arial; font-size:10px; padding:5px 0 5px; margin:2px; width:100%; text-align:left;" ><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/r/etckt" >Online Ticketing</a><span style="color:#ddd;" > for </span><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/event/' . $evnt->id . '?ref=etckt" >' . $evnt->title . '</a><span style="color:#ddd;" > powered by </span><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com?ref=etckt" >Eventbrite</a></div></div>';
}
public static function registrationWidget( $evnt ) {
return '<div style="width:100%; text-align:left;" ><iframe src="http://www.eventbrite.com/event/' . $evnt->id . '?ref=eweb" frameborder="0" height="1000" width="100%" vspace="0" hspace="0" marginheight="5" marginwidth="5" scrolling="auto" allowtransparency="true"></iframe><div style="font-family:Helvetica, Arial; font-size:10px; padding:5px 0 5px; margin:2px; width:100%; text-align:left;" ><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/r/eweb" >Online Ticketing</a><span style="color:#ddd;" > for </span><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/event/' . $evnt->id . '?ref=eweb" >' . $evnt->title . '</a><span style="color:#ddd;" > powered by </span><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com?ref=eweb" >Eventbrite</a></div></div>';
}
public static function calendarWidget( $evnt ) {
return '<div style="width:195px; text-align:center;" ><iframe src="http://www.eventbrite.com/calendar-widget?eid=' . $evnt->id . '" frameborder="0" height="382" width="195" marginheight="0" marginwidth="0" scrolling="no" allowtransparency="true"></iframe><div style="font-family:Helvetica, Arial; font-size:10px; padding:5px 0 5px; margin:2px; width:195px; text-align:center;" ><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/r/ecal">Online event registration</a><span style="color:#ddd;" > powered by </span><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com?ref=ecal" >Eventbrite</a></div></div>';
}
public static function countdownWidget( $evnt ) {
return '<div style="width:195px; text-align:center;" ><iframe src="http://www.eventbrite.com/countdown-widget?eid=' . $evnt->id . '" frameborder="0" height="479" width="195" marginheight="0" marginwidth="0" scrolling="no" allowtransparency="true"></iframe><div style="font-family:Helvetica, Arial; font-size:10px; padding:5px 0 5px; margin:2px; width:195px; text-align:center;" ><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/r/ecount" >Online event registration</a><span style="color:#ddd;" > for </span><a style="color:#ddd; text-decoration:none;" target="_blank" href="http://www.eventbrite.com/event/' . $evnt->id . '?ref=ecount" >' . $evnt->title . '</a></div></div>';
}
public static function buttonWidget( $evnt ) {
return '<a href="http://www.eventbrite.com/event/' . $evnt->id . '?ref=ebtn" target="_blank"><img border="0" src="http://www.eventbrite.com/custombutton?eid=' . $evnt->id . '" alt="Register for ' . $evnt->title . ' on Eventbrite" /></a>';
}
public static function linkWidget( $evnt, $text=null, $color=null ) {
return '<a href="http://www.eventbrite.com/event/' . $evnt->id . '?ref=elink" target="_blank" style="color:' . ( $color ? $color : "#000000" ) . ';">' . ( $text ? $text : $evnt->title ) . '</a>';
}
};
?>