rss-bridge/bridges/DockerHubBridge.php

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<?php
class DockerHubBridge extends BridgeAbstract
{
const NAME = 'Docker Hub Bridge';
const URI = 'https://hub.docker.com';
const DESCRIPTION = 'Returns new images for a container';
const MAINTAINER = 'VerifiedJoseph';
const PARAMETERS = [
'User Submitted Image' => [
'user' => [
'name' => 'User',
'type' => 'text',
'required' => true,
'exampleValue' => 'rssbridge',
],
'repo' => [
'name' => 'Repository',
'type' => 'text',
'required' => true,
'exampleValue' => 'rss-bridge',
],
'filter' => [
'name' => 'Filter tag',
'type' => 'text',
'required' => false,
'exampleValue' => 'latest',
]
],
'Official Image' => [
'repo' => [
'name' => 'Repository',
'type' => 'text',
'required' => true,
'exampleValue' => 'postgres',
],
'filter' => [
'name' => 'Filter tag',
'type' => 'text',
'required' => false,
'exampleValue' => 'alpine3.17',
]
]
];
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)
{
$params = [];
// user submitted image
if (preg_match($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;
}
public function collectData()
{
$json = getContents($this->getApiUrl());
$data = json_decode($json, false);
foreach ($data->results as $result) {
$item = [];
$lastPushed = date('Y-m-d H:i:s', strtotime($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;
$item['content'] = <<<EOD
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<Strong>Tag</strong><br>
<p>{$result->name}</p>
<Strong>Last pushed</strong><br>
<p>{$lastPushed}</p>
<Strong>Images</strong><br>
{$this->getImagesTable($result)}
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EOD;
$this->items[] = $item;
}
}
public function getURI()
{
$uri = parent::getURI();
if ($this->queriedContext === 'Official Image') {
$uri = self::URI . '/_/' . $this->getRepo();
}
if ($this->queriedContext === 'User Submitted Image') {
$uri = '/r/' . $this->getRepo();
}
if ($this->getInput('filter')) {
$uri .= '/tags/?&page=1&name=' . $this->getInput('filter');
}
return $uri;
}
public function getName()
{
if ($this->getInput('repo')) {
$name = $this->getRepo();
if ($this->getInput('filter')) {
$name .= ':' . $this->getInput('filter');
}
return $name . ' - Docker Hub';
}
return parent::getName();
}
private function getRepo()
{
if ($this->queriedContext === 'Official Image') {
return $this->getInput('repo');
}
return $this->getInput('user') . '/' . $this->getInput('repo');
}
private function getApiUrl()
{
$url = '';
if ($this->queriedContext === 'Official Image') {
$url = $this->apiURL . 'library/' . $this->getRepo() . '/tags/?page_size=25&page=1';
}
if ($this->queriedContext === 'User Submitted Image') {
$url = $this->apiURL . $this->getRepo() . '/tags/?page_size=25&page=1';
}
if ($this->getInput('filter')) {
$url .= '&name=' . $this->getInput('filter');
}
return $url;
}
private function getLayerUrl($name, $digest)
{
if ($this->queriedContext === 'Official Image') {
return self::URI . '/layers/' . $this->getRepo() . '/library/' .
$this->getRepo() . '/' . $name . '/images/' . $digest;
}
return self::URI . '/layers/' . $this->getRepo() . '/' . $name . '/images/' . $digest;
}
private function getTagUrl($name)
{
$url = '';
if ($this->queriedContext === 'Official Image') {
$url = self::URI . '/_/' . $this->getRepo();
}
if ($this->queriedContext === 'User Submitted Image') {
$url = self::URI . '/r/' . $this->getRepo();
}
return $url . '/tags/?&name=' . $name;
}
private function getImagesTable($result)
{
$data = '';
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foreach ($result->images as $image) {
$layersUrl = $this->getLayerUrl($result->name, $image->digest);
$id = $this->getShortDigestId($image->digest);
$size = format_bytes($image->size);
$data .= <<<EOD
<tr>
<td><a href="{$layersUrl}">{$id}</a></td>
<td>{$image->os}/{$image->architecture}</td>
<td>{$size}</td>
</tr>
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EOD;
}
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return <<<EOD
<table style="width:400px;">
<thead>
<tr style="text-align: left;">
<th>Digest</th>
<th>OS/architecture</th>
<th>Compressed Size</th>
</tr>
</thead>
</tbody>
{$data}
</tbody>
</table>
EOD;
}
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private function getShortDigestId($digest)
{
$parts = explode(':', $digest);
return substr($parts[1], 0, 12);
}
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}