rss-bridge/bridges/DockerHubBridge.php

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<?php
class DockerHubBridge extends BridgeAbstract {
const NAME = 'Docker Hub Bridge';
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const URI = 'https://hub.docker.com';
const DESCRIPTION = 'Returns new images for a container';
const MAINTAINER = 'VerifiedJoseph';
const PARAMETERS = array(
'User Submitted Image' => array(
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'user' => array(
'name' => 'User',
'type' => 'text',
'required' => true,
'exampleValue' => 'rssbridge',
),
'repo' => array(
'name' => 'Repository',
'type' => 'text',
'required' => true,
'exampleValue' => 'rss-bridge',
)
),
'Official Image' => array(
'repo' => array(
'name' => 'Repository',
'type' => 'text',
'required' => true,
'exampleValue' => 'postgres',
)
),
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);
const CACHE_TIMEOUT = 3600; // 1 hour
private $apiURL = 'https://hub.docker.com/v2/repositories/';
private $imageUrlRegex = '/hub\.docker\.com\/r\/([\w]+)\/([\w-]+)\/?/';
private $officialImageUrlRegex = '/hub\.docker\.com\/_\/([\w-]+)\/?/';
public function detectParameters($url) {
$params = array();
// user submitted image
if(preg_match($this->imageUrlRegex, $url, $matches)) {
$params['context'] = 'User Submitted Image';
$params['user'] = $matches[1];
$params['repo'] = $matches[2];
return $params;
}
// official image
if(preg_match($this->officialImageUrlRegex, $url, $matches)) {
$params['context'] = 'Official Image';
$params['repo'] = $matches[1];
return $params;
}
return null;
}
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public function collectData() {
$json = getContents($this->getApiUrl())
or returnServerError('Could not request: ' . $this->getURI());
$data = json_decode($json, false);
foreach ($data->results as $result) {
$item = array();
$lastPushed = date('Y-m-d H:i:s', strtotime($result->tag_last_pushed));
$item['title'] = $result->name;
$item['uid'] = $result->id;
$item['uri'] = $this->getTagUrl($result->name);
$item['author'] = $result->last_updater_username;
$item['timestamp'] = $result->tag_last_pushed;
$item['content'] = <<<EOD
<Strong>Tag</strong><br>
<p>{$result->name}</p>
<Strong>Last pushed</strong><br>
<p>{$lastPushed}</p>
<Strong>Images</strong><br>
{$this->getImages($result)}
EOD;
$this->items[] = $item;
}
}
public function getURI() {
if ($this->queriedContext === 'Official Image') {
return self::URI . '/_/' . $this->getRepo();
}
if ($this->getInput('repo')) {
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return self::URI . '/r/' . $this->getRepo();
}
return parent::getURI();
}
public function getName() {
if ($this->getInput('repo')) {
return $this->getRepo() . ' - Docker Hub';
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}
return parent::getName();
}
private function getRepo() {
if ($this->queriedContext === 'Official Image') {
return $this->getInput('repo');
}
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return $this->getInput('user') . '/' . $this->getInput('repo');
}
private function getApiUrl() {
if ($this->queriedContext === 'Official Image') {
return $this->apiURL . 'library/' . $this->getRepo() . '/tags/?page_size=25&page=1';
}
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return $this->apiURL . $this->getRepo() . '/tags/?page_size=25&page=1';
}
private function getLayerUrl($name, $digest) {
if ($this->queriedContext === 'Official Image') {
return self::URI . '/layers/' . $this->getRepo() . '/library/' .
$this->getRepo() . '/' . $name . '/images/' . $digest;
}
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return self::URI . '/layers/' . $this->getRepo() . '/' . $name . '/images/' . $digest;
}
private function getTagUrl($name) {
if ($this->queriedContext === 'Official Image') {
return self::URI . '/_/' . $this->getRepo() . '?tab=tags&name=' . $name;
}
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return self::URI . '/r/' . $this->getRepo() . '/tags?name=' . $name;
}
private function getImages($result) {
$html = <<<EOD
<table style="width:300px;"><thead><tr><th>Digest</th><th>OS/architecture</th></tr></thead></tbody>
EOD;
foreach ($result->images as $image) {
$layersUrl = $this->getLayerUrl($result->name, $image->digest);
$id = $this->getShortDigestId($image->digest);
$html .= <<<EOD
<tr>
<td><a href="{$layersUrl}">{$id}</a></td>
<td>{$image->os}/{$image->architecture}</td>
</tr>
EOD;
}
return $html . '</tbody></table>';
}
private function getShortDigestId($digest) {
$parts = explode(':', $digest);
return substr($parts[1], 0, 12);
}
}