rss-bridge/bridges/WordPressPluginUpdateBridge.php

<?php

final class WordPressPluginUpdateBridge extends BridgeAbstract {
	const MAINTAINER = 'dvikan';
	const NAME = 'WordPress Plugins Update Bridge';
	const URI = 'https://wordpress.org/plugins/';
	const DESCRIPTION = 'Returns latest updates of wordpress.org plugins.';

	const PARAMETERS = [
		[
			// The incorrectly named pluginUrl is kept for BC
			'pluginUrl' => [
				'name' => 'Plugin slug',
				'exampleValue' => 'akismet',
				'required' => true,
				'title' => 'Slug or url',
			]
		]
	];

	public function collectData() {
		$input = trim($this->getInput('pluginUrl'));
		if (preg_match('#https://wordpress\.org/plugins/([\w-]+)#', $input, $m)) {
			$slug = $m[1];
		} else {
			$slug = str_replace(['/'], '', $input);
		}

		$pluginData = self::fetchPluginData($slug);

		if ($pluginData->versions === []) {
			throw new \Exception('This plugin does not have versioning data');
		}

		// We don't need trunk. I think it's the latest commit.
		unset($pluginData->versions->trunk);

		foreach ($pluginData->versions as $version => $downloadUrl) {
			$this->items[] = [
				'title'     => $version,
				'uri'       => sprintf('https://wordpress.org/plugins/%s/#developers', $slug),
				'uid'       => $downloadUrl,
			];
		}

		usort($this->items, function($a, $b) {
			return version_compare($b['title'], $a['title']);
		});
	}

	/**
	 * Fetch plugin data from wordpress.org json api
	 *
	 * https://codex.wordpress.org/WordPress.org_API#Plugins
	 * https://wordpress.org/support/topic/using-the-wordpress-org-api/
	 */
	private static function fetchPluginData(string $slug): \stdClass
	{
		$api = 'https://api.wordpress.org/plugins/info/1.2/?action=plugin_information&request[slug]=%s';
		return json_decode(getContents(sprintf($api, $slug)));
	}
}