add piwik installation

www/analytics/core/AssetManager/UIAssetFetcher/StylesheetUIAssetFetcher.php

@@ -0,0 +1,64 @@
+<?php
+/**
+ * Piwik - Open source web analytics
+ *
+ * @link http://piwik.org
+ * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
+ *
+ */
+namespace Piwik\AssetManager\UIAssetFetcher;
+
+use Piwik\AssetManager\UIAssetFetcher;
+use Piwik\Piwik;
+
+class StylesheetUIAssetFetcher extends UIAssetFetcher
+{
+    protected function getPriorityOrder()
+    {
+        return array(
+            'libs/',
+            'plugins/CoreHome/stylesheets/color_manager.css', // must be before other Piwik stylesheets
+            'plugins/Zeitgeist/stylesheets/base.less',
+            'plugins/Zeitgeist/stylesheets/',
+            'plugins/',
+            'plugins/Dashboard/stylesheets/dashboard.less',
+            'tests/',
+        );
+    }
+
+    protected function retrieveFileLocations()
+    {
+        /**
+         * Triggered when gathering the list of all stylesheets (CSS and LESS) needed by
+         * Piwik and its plugins.
+         *
+         * Plugins that have stylesheets should use this event to make those stylesheets
+         * load.
+         *
+         * Stylesheets should be placed within a **stylesheets** subdirectory in your plugin's
+         * root directory.
+         *
+         * **Example**
+         *
+         *     public function getStylesheetFiles(&$stylesheets)
+         *     {
+         *         $stylesheets[] = "plugins/MyPlugin/stylesheets/myfile.less";
+         *         $stylesheets[] = "plugins/MyPlugin/stylesheets/myotherfile.css";
+         *     }
+         *
+         * @param string[] &$stylesheets The list of stylesheet paths.
+         */
+        Piwik::postEvent('AssetManager.getStylesheetFiles', array(&$this->fileLocations));
+
+        $this->addThemeFiles();
+    }
+
+    protected function addThemeFiles()
+    {
+        $themeStylesheet = $this->getTheme()->getStylesheet();
+
+        if($themeStylesheet) {
+            $this->fileLocations[] = $themeStylesheet;
+        }
+    }
+}