Prepare file upload API (references #58)

services/FilesService.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace Grocy\Services;
+
+class FilesService extends BaseService
+{
+	public function __construct()
+	{
+		parent::__construct();
+		
+		$this->StoragePath = GROCY_DATAPATH . '/storage';
+		
+		if (!file_exists($this->StoragePath))
+		{
+			mkdir($this->StoragePath);
+		}
+	}
+
+	private $StoragePath;
+
+	public function GetFilePath($group, $fileName)
+	{
+		$groupFolderPath = $this->StoragePath . '/' . $group;
+		if (!file_exists($groupFolderPath))
+		{
+			mkdir($groupFolderPath);
+		}
+
+		return  $groupFolderPath . '/' . $fileName;
+	}
+}