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<?php
namespace p3k\XRay\Formats;
use DOMDocument, DOMXPath;
use DateTime, DateTimeZone;
class Facebook extends Format {
public static function matches_host($url) {
$host = parse_url($url, PHP_URL_HOST);
// TODO: match hosts like 'm.facebook.com' and 'mbasic.facebook.com'
return in_array($host, ['www.facebook.com','facebook.com']);
}
public static function matches($url) {
return self::matches_host($url);
}
public static function parse($fbObject, $url) {
$parts = self::extract_url_parts($url);
if($parts['type'] == 'event') {
$event = array(
'type' => 'event',
'url' => $url,
'name' => $fbObject['name'],
'start' => $fbObject['start_time']
);
if(isset($fbObject['end_time'])) $event['end'] = $fbObject['end_time'];
if(isset($fbObject['description'])) $event['summary'] = $fbObject['description'];
// Is the event linked to a Page?
if(isset($fbObject['place']['id'])) {
$card = array(
'type' => 'card',
'url' => 'https://facebook.com/'.$fbObject['place']['id'],
'name' => $fbObject['place']['name']
);
if(isset($fbObject['place']['location'])) {
$location = $fbObject['place']['location'];
if(isset($location['zip'])) $card['postal-code'] = $location['zip'];
if(isset($location['city'])) $card['locality'] = $location['city'];
if(isset($location['state'])) $card['region'] = $location['state'];
if(isset($location['street'])) $card['street-address'] = $location['street'];
if(isset($location['country'])) $card['country'] = $location['country'];
if(isset($location['latitude'])) $card['latitude'] = (string)$location['latitude'];
if(isset($location['longitude'])) $card['longitude'] = (string)$location['longitude'];
}
$event['location'] = $card['url'];
$event['refs'] = array($card);
// If we only have a name, use that
} elseif(isset($fbObject['place']['name'])) {
$event['location'] = $fbObject['place']['name'];
}
return [
'data' => $event,
'original' => $fbObject
];
}
}
public static function fetch($url, $creds) {
$parts = self::extract_url_parts($url);
if(!$parts or $parts['api_uri'] == false) {
return [
'error' => 'unsupported_url',
'error_description' => 'This Facebook URL is not supported',
'error_code' => 400,
];
}
$fb = new \Facebook\Facebook(array(
'app_id' => $creds['facebook_app_id'],
'app_secret' => $creds['facebook_app_secret'],
'default_graph_version' => 'v2.9',
));
$fbApp = new \Facebook\FacebookApp($creds['facebook_app_id'], $creds['facebook_app_secret']);
$token = $fbApp->getAccessToken();
$request = new \Facebook\FacebookRequest($fbApp, $token, 'GET', $parts['api_uri']);
try {
$response = $fb->getClient()->sendRequest($request);
} catch(\Facebook\Exceptions\FacebookResponseException $e) {
return [
'error' => 'facebook_graph_error',
'error_description' => 'Graph returned an error: ' . $e->getMessage(),
'error_code' => 400,
];
} catch(\Facebook\Exceptions\FacebookSDKException $e) {
return [
'error' => 'facebook_sdk_error',
'error_description' => 'Facebook SDK returned an error: ' . $e->getMessage(),
'error_code' => 400,
];
}
return [
'code' => 200,
'body' => $response->getDecodedBody(),
'url' => $url
];
}
private static function extract_url_parts($url) {
$response = false;
if(preg_match('~https://(.*?).?facebook.com/([^/]+)/posts/(\d+)/?$~', $url, $match)) {
// TODO: how do we get these?
// $response['type'] = 'entry';
// $response['api_uri'] = false;
} elseif(preg_match('~https://(.*?).?facebook.com/events/(\d+)/?$~', $url, $match)) {
$response['type'] = 'event';
$response['api_uri'] = '/'.$match[2];
}
return $response;
}
}