silverstripe-blog/code/TrackBackDecorator.php

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2012-05-21 04:58:26 +02:00
<?php
/**
* Add trackback (receive and send) feature blog entry
*/
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class TrackBackDecorator extends DataExtension {
static $trackback_server_class = 'TrackbackHTTPServer';
// function extraStatics() {
// return array(
// 'has_many' => array(
// 'TrackBackURLs' => 'TrackBackURL',
// 'TrackBacks' => 'TrackBackPing'
// )
// );
// }
static $has_many = array(
'TrackBackURLs' => 'TrackBackURL',
'TrackBacks' => 'TrackBackPing'
);
// function updateCMSFields($fields) {
// // Trackback URL field
// if($this->owner->TrackBacksEnabled()) {
// $trackbackURLTable = new ComplexTableField(
// $this,
// 'TrackBackURLs',
// 'TrackBackURL',
// array(
// 'URL' => 'URL',
// 'IsPung' => 'Pung?'
// ),
// 'getCMSFields_forPopup',
// '',
// 'ID'
// );
// $fields->addFieldToTab("Root.Content.Main", $trackbackURLTable);
// }
// else {
// $fields->addFieldToTab("Root.Content.Main", new ReadonlyField("TrackBackURLsReadOnly", _t("BlogEntry.TrackbackURLs", "Trackback URLs"), _t("BlogEntry.TrackbackURLs_DISABLED", "To use this feature, please check 'Enable TrackBacks' check box on the blog holder.")));
// }
// }
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function onBeforePublish() {
if(!$this->owner->TrackBacksEnabled() && !$this->owner->TrackBackURLs()) return;
foreach($this->owner->TrackBackURLs() as $trackBackURL) {
if(!$trackBackURL->Pung && $this->trackbackNotify($trackBackURL->URL)) {
$trackBackURL->Pung = true;
$trackBackURL->write();
}
}
}
/**
* Trackback notify the specified trackback url
* @param boolean | true on success, otherwise false
*/
function trackbackNotify($url) {
$content = new HTMLText('Content');
$content->setValue($this->owner->Content);
$excerpt = $content->FirstParagraph();
if($this->owner->Parent() && $this->owner->ParentID > 0) {
$blogName = $this->owner->Parent()->Title;
}
else {
$blogName = "";
}
$postData = array(
'url' => $this->owner->AbsoluteLink(),
'title' => $this->owner->Title,
'excerpt' => $excerpt,
'blog_name' => $blogName
);
$controller = Object::create(self::$trackback_server_class);
$response = $controller->request($url, $postData);
if($response->getStatusCode() == '200' && stripos($response->getBody(), "<error>0</error>") !== false) {
return true;
}
return false;
}
function updateMetaTags(&$tags) {
$tags .= $this->owner->renderWith('TrackBackRdf');
}
function TrackBackPingLink() {
return $this->owner->AbsoluteLink() . 'trackbackping';
}
function decoratedTrackbackping() {
$error = 0;
$message = '';
if(!(isset($_POST['url']) && $_POST['url'])) {
$error = 1;
$message = 'Missing required POST parameter \'url\'.';
} else {
$trackbackping = new TrackBackPing();
$trackbackping->Url = $_POST['url'];
if(isset($_POST['title']) && $_POST['title']) {
$trackbackping->Title = $_POST['title'];
}
if(isset($_POST['excerpt']) && $_POST['excerpt']) {
$trackbackping->Excerpt = $_POST['excerpt'];
}
if(isset($_POST['blog_name']) && $_POST['blog_name']) {
$trackbackping->BlogName = $_POST['blog_name'];
}
$trackbackping->PageID = $this->owner->ID;
$trackbackping->write();
}
$returnData = new ArrayData(array(
'Error' => $error,
'Message' => $message
));
return $returnData->renderWith('TrackBackPingReturn');
}
}
/**
* Example:
* $controller = Object::create('TrackbackHTTPClient');
* $response = $controller->request(new SS_HTTPRequest('POST', $url, null, $postData));
*/
class TrackbackHTTPServer {
function __construct() {}
/**
* @param string
* @param array
* @return SS_HTTPResponse
*/
function request($url, $data) {
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_FRESH_CONNECT, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
$response = curl_exec($ch);
$statusCode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
return new SS_HTTPResponse($response, $statusCode);
}
}
?>