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msd2/tracking/piwik/plugins/SEO/Metric/Alexa.php

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+<?php
+/**
+ * Piwik - free/libre analytics platform
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ */
+
+namespace Piwik\Plugins\SEO\Metric;
+
+use Piwik\Http;
+use Piwik\NumberFormatter;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Retrieves the Alexa rank.
+ */
+class Alexa implements MetricsProvider
+{
+    const URL = 'https://data.alexa.com/data?cli=10&url=';
+    const URL_FALLBACK = 'https://www.alexa.com/minisiteinfo/';
+    const LINK = 'https://www.alexa.com/siteinfo/';
+
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
+    public function __construct(LoggerInterface $logger)
+    {
+        $this->logger = $logger;
+    }
+
+    public function getMetrics($domain)
+    {
+        try {
+            $response = Http::sendHttpRequest(self::URL . urlencode($domain), $timeout = 10, @$_SERVER['HTTP_USER_AGENT']);
+            $xml = @simplexml_load_string($response);
+            $value = $xml ? NumberFormatter::getInstance()->formatNumber((int)$xml->SD->POPULARITY['TEXT']) : null;
+        } catch (\Exception $e) {
+            $this->logger->warning('Error while getting Alexa SEO stats: {message}', array('message' => $e->getMessage()));
+            $value = $this->tryFallbackMethod($domain);
+        }
+
+        $logo = "plugins/Morpheus/icons/dist/SEO/alexa.com.png";
+        $link = self::LINK . urlencode($domain);
+
+        return array(
+            new Metric('alexa', 'SEO_AlexaRank', $value, $logo, $link)
+        );
+    }
+
+    private function tryFallbackMethod($domain)
+    {
+        try {
+            $response = Http::sendHttpRequest(self::URL_FALLBACK . urlencode($domain), $timeout = 10, @$_SERVER['HTTP_USER_AGENT']);
+            $dom = new \DomDocument();
+            $dom->loadHTML($response);
+            $nodes = (new \DomXPath($dom))->query("//div[contains(@class, 'data')]");
+            if (isset($nodes[0]->nodeValue)) {
+                $globalRanking = (int) str_replace(array(',', '.'), '', $nodes[0]->nodeValue);
+                return NumberFormatter::getInstance()->formatNumber($globalRanking);
+            }
+        } catch (\Exception $e) {
+            $this->logger->warning('Error while getting Alexa SEO stats via fallback method: {message}', array('message' => $e->getMessage()));
+        }
+        return null;
+    }
+}