<?php

/**
 * Matomo - free/libre analytics platform
 *
 * @link    https://matomo.org
 * @license https://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 */
namespace Piwik\Plugin;

use Exception;
use Piwik\Piwik;
use Piwik\Url;
use Piwik\Version;
/**
 * @see core/Version.php
 */
require_once PIWIK_INCLUDE_PATH . '/core/Version.php';
/**
 * Loads plugin metadata found in the following files:
 * - piwik.json
 */
class MetadataLoader
{
    public const PLUGIN_JSON_FILENAME = 'plugin.json';
    /**
     * The name of the plugin whose metadata will be loaded.
     *
     * @var string
     */
    private $pluginName;
    /**
     * @param string $pluginName Name of the plugin to load metadata.
     */
    public function __construct($pluginName)
    {
        $this->pluginName = $pluginName;
    }
    /**
     * Loads plugin metadata. @see Plugin::getInformation.
     *
     * @return array
     */
    public function load()
    {
        $defaults = $this->getDefaultPluginInformation();
        $plugin = $this->loadPluginInfoJson();
        // use translated plugin description if available
        if ($defaults['description'] != Piwik::translate($defaults['description'])) {
            unset($plugin['description']);
        }
        // look for a license file
        $licenseFile = $this->getPathToLicenseFile();
        if (!empty($licenseFile)) {
            $plugin['license_file'] = $licenseFile;
        }
        return array_merge($defaults, $plugin);
    }
    public function hasPluginJson()
    {
        $hasJson = $this->loadPluginInfoJson();
        return !empty($hasJson);
    }
    private function getDefaultPluginInformation()
    {
        $descriptionKey = $this->pluginName . '_PluginDescription';
        return ['description' => $descriptionKey, 'homepage' => Url::addCampaignParametersToMatomoLink('https://matomo.org/'), 'authors' => [['name' => 'Matomo', 'homepage' => Url::addCampaignParametersToMatomoLink('https://matomo.org/')]], 'license' => 'GPL v3+', 'version' => Version::VERSION, 'theme' => \false, 'require' => []];
    }
    /**
     * It is important that this method works without using anything from DI
     * @return array|mixed
     */
    public function loadPluginInfoJson()
    {
        $path = $this->getPathToPluginJson();
        return $this->loadJsonMetadata($path);
    }
    public function getPathToPluginJson()
    {
        $path = $this->getPathToPluginFolder() . '/' . self::PLUGIN_JSON_FILENAME;
        return $path;
    }
    private function loadJsonMetadata($path)
    {
        if (!file_exists($path)) {
            return array();
        }
        $json = file_get_contents($path);
        if (!$json) {
            return array();
        }
        $info = json_decode($json, $assoc = \true);
        if (!is_array($info) || empty($info)) {
            throw new Exception("Invalid JSON file: {$path}");
        }
        return $info;
    }
    /**
     * @return string
     */
    private function getPathToPluginFolder()
    {
        return \Piwik\Plugin\Manager::getPluginDirectory($this->pluginName);
    }
    /**
     * @return null|string
     */
    public function getPathToLicenseFile()
    {
        $prefixPath = $this->getPathToPluginFolder() . '/';
        $licenseFiles = array('LICENSE', 'LICENSE.md', 'LICENSE.txt');
        foreach ($licenseFiles as $licenseFile) {
            $pathToLicense = $prefixPath . $licenseFile;
            if (is_file($pathToLicense) && is_readable($pathToLicense)) {
                return $pathToLicense;
            }
        }
        return null;
    }
}