update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/SEO/Metric/Dmoz.php

@@ -0,0 +1,63 @@
+<?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 Piwik\Plugins\Referrers\SearchEngine;
+use Psr\Log\LoggerInterface;
+
+/**
+ * Retrieves the number of Dmoz.org entries.
+ */
+class Dmoz implements MetricsProvider
+{
+    const URL = 'http://www.dmoz.org/search?q=';
+
+    /**
+     * @var LoggerInterface
+     */
+    private $logger;
+
+    /**
+     * @param LoggerInterface $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']);
+
+            preg_match('#DMOZ Sites[^\(]+\([0-9]-[0-9]+ of ([0-9]+)\)#', $response, $p);
+            if (!empty($p[1])) {
+                $value = NumberFormatter::getInstance()->formatNumber((int)$p[1]);
+            } else {
+                $value = 0;
+            }
+
+            // Add DMOZ only if > 0 entries found
+            if ($value == 0) {
+                return array();
+            }
+        } catch (\Exception $e) {
+            $this->logger->warning('Error while getting Dmoz SEO stats: {message}', array('message' => $e->getMessage()));
+            $value = null;
+        }
+
+        $logo = SearchEngine::getInstance()->getLogoFromUrl('http://dmoz.org');
+
+        return array(
+            new Metric('dmoz', 'SEO_Dmoz', $value, $logo)
+        );
+    }
+}