add piwik installation

www/analytics/core/Unzip.php

@@ -0,0 +1,52 @@
+<?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;
+
+use Piwik\Unzip\Gzip;
+use Piwik\Unzip\PclZip;
+use Piwik\Unzip\Tar;
+use Piwik\Unzip\ZipArchive;
+
+/**
+ * Unzip wrapper around ZipArchive and PclZip
+ *
+ */
+class Unzip
+{
+    /**
+     * Factory method to create an unarchiver
+     *
+     * @param string $name Name of unarchiver
+     * @param string $filename Name of .zip archive
+     * @return \Piwik\Unzip\UncompressInterface
+     */
+    static public function factory($name, $filename)
+    {
+        switch ($name) {
+            case 'ZipArchive':
+                if (class_exists('ZipArchive', false))
+                    return new ZipArchive($filename);
+                break;
+            case 'tar.gz':
+                return new Tar($filename, 'gz');
+            case 'tar.bz2':
+                return new Tar($filename, 'bz2');
+            case 'gz':
+                if (function_exists('gzopen'))
+                    return new Gzip($filename);
+                break;
+            case 'PclZip':
+            default:
+                return new PclZip($filename);
+        }
+
+        return new PclZip($filename);
+    }
+}