add piwik installation

www/analytics/core/AssetManager/UIAsset/OnDiskUIAsset.php

@@ -0,0 +1,113 @@
+<?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\UIAsset;
+
+use Exception;
+use Piwik\AssetManager\UIAsset;
+
+class OnDiskUIAsset extends UIAsset
+{
+    /**
+     * @var string
+     */
+    private $baseDirectory;
+
+    /**
+     * @var string
+     */
+    private $relativeLocation;
+
+    /**
+     * @param string $baseDirectory
+     * @param string $fileLocation
+     */
+    function __construct($baseDirectory, $fileLocation)
+    {
+        $this->baseDirectory = $baseDirectory;
+        $this->relativeLocation = $fileLocation;
+    }
+
+    public function getAbsoluteLocation()
+    {
+        return $this->baseDirectory . '/' . $this->relativeLocation;
+    }
+
+    public function getRelativeLocation()
+    {
+        return $this->relativeLocation;
+    }
+
+    public function getBaseDirectory()
+    {
+        return $this->baseDirectory;
+    }
+
+    public function validateFile()
+    {
+        if (!$this->assetIsReadable())
+            throw new Exception("The ui asset with 'href' = " . $this->getAbsoluteLocation() . " is not readable");
+    }
+
+    public function delete()
+    {
+        if ($this->exists()) {
+
+            if (!unlink($this->getAbsoluteLocation()))
+                throw new Exception("Unable to delete merged file : " . $this->getAbsoluteLocation() . ". Please delete the file and refresh");
+
+            // try to remove compressed version of the merged file.
+            @unlink($this->getAbsoluteLocation() . ".deflate");
+            @unlink($this->getAbsoluteLocation() . ".gz");
+        }
+    }
+
+    /**
+     * @param string $content
+     * @throws \Exception
+     */
+    public function writeContent($content)
+    {
+        $this->delete();
+
+        $newFile = @fopen($this->getAbsoluteLocation(), "w");
+
+        if (!$newFile)
+            throw new Exception ("The file : " . $newFile . " can not be opened in write mode.");
+
+        fwrite($newFile, $content);
+
+        fclose($newFile);
+    }
+
+    /**
+     * @return string
+     */
+    public function getContent()
+    {
+        return file_get_contents($this->getAbsoluteLocation());
+    }
+
+    public function exists()
+    {
+        return $this->assetIsReadable();
+    }
+
+    /**
+     * @return boolean
+     */
+    private function assetIsReadable()
+    {
+        return is_readable($this->getAbsoluteLocation());
+    }
+
+    public function getModificationDate()
+    {
+        return filemtime($this->getAbsoluteLocation());
+    }
+}