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<!DOCTYPE html>
<html>
<?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\Plugins\SEO\Metric;

use Piwik\Container\StaticContainer;
use Piwik\Piwik;
/**
 * Aggregates metrics from several providers.
 */
class Aggregator implements \Piwik\Plugins\SEO\Metric\MetricsProvider
{
    /**
     * @var MetricsProvider[]
     */
    private $providers;
    public function __construct()
    {
        $this->providers = $this->getProviders();
    }
    public function getMetrics(string $domain)
    {
        $metrics = [];
        foreach ($this->providers as $provider) {
            $metrics = array_merge($metrics, $provider->getMetrics($domain));
        }
        return $metrics;
    }
    /**
     * @return MetricsProvider[]
     */
    private function getProviders()
    {
        $container = StaticContainer::getContainer();
        $providers = [$container->get('Piwik\\Plugins\\SEO\\Metric\\Bing'), $container->get('Piwik\\Plugins\\SEO\\Metric\\DomainAge')];
        /**
         * Use this event to register new SEO metrics providers.
         *
         * @param array $providers Contains an array of Piwik\Plugins\SEO\Metric\MetricsProvider instances.
         */
        Piwik::postEvent('SEO.getMetricsProviders', [&$providers]);
        return $providers;
    }
}
