update Piwik to version 2.16 (fixes #91)

www/analytics/plugins/Diagnostics/Diagnostic/GdExtensionCheck.php

@@ -0,0 +1,45 @@
+<?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\Diagnostics\Diagnostic;
+
+use Piwik\Config;
+use Piwik\SettingsServer;
+use Piwik\Translation\Translator;
+
+/**
+ * Check that the GD extension is installed and the correct version.
+ */
+class GdExtensionCheck implements Diagnostic
+{
+    /**
+     * @var Translator
+     */
+    private $translator;
+
+    public function __construct(Translator $translator)
+    {
+        $this->translator = $translator;
+    }
+
+    public function execute()
+    {
+        $label = $this->translator->translate('Installation_SystemCheckGDFreeType');
+
+        if (SettingsServer::isGdExtensionEnabled()) {
+            return array(DiagnosticResult::singleResult($label, DiagnosticResult::STATUS_OK));
+        }
+
+        $comment = sprintf(
+            '%s<br />%s',
+            $this->translator->translate('Installation_SystemCheckGDFreeType'),
+            $this->translator->translate('Installation_SystemCheckGDHelp')
+        );
+
+        return array(DiagnosticResult::singleResult($label, DiagnosticResult::STATUS_WARNING, $comment));
+    }
+}