add file system class for missing file/dir creation with writability exception

src/Utils/FileSystem/FileSystem.php

@@ -0,0 +1,45 @@
+<?php
+namespace Bsr\Utils\FileSystem;
+
+class FileSystem
+{
+    /**
+     * @param string $path full path
+     * @throws Exception if not writable
+     */
+    public static function createFileOrDirIfNotExists($path, $file=false, $throw=true)
+    {
+        if (file_exists($path)) {
+            return true;
+        }
+
+        $notExistsPart = false;
+        $parts = explode('/', $path);
+        $partsCount = count($parts);
+        $buildPath = '';
+        for ($i=0; $i<$partsCount; $i++) {
+            $part = $parts[$i];
+            if (!file_exists($buildPath . "/$part")) {
+                if (!is_writable($builPath)) {
+                    if ($throw) {
+                        throw new Exception("Attempting to create : $path, but $buildPath is not writeable.");
+                    }
+                    return false;
+                }
+                $notExistsPart = true;
+                break;
+            }
+            $buildPath .= "/$part";
+        }
+        
+        if ($file) {
+            $fileName = array_pop($parts);
+        }
+        $dirPath = implode('/', $parts);
+        mkdir($dirPath, 0777, true);
+        if ($file) {
+            touch("$dirPath/$fileName");
+        }
+        return true;
+    }
+}

src/Utils/Logger/Logger.php

@@ -2,6 +2,7 @@
 namespace Bsr\Utils\Logger;
 
 use Bsr\Utils\Configuration\Configuration;
+use Bsr\Utils\FileSystem\FileSystem;
 
 class Logger {
 
@@ -158,12 +159,7 @@ class Logger {
     {
         $mostRecentLogFileName = Configuration::get('log.file');
 
-        if (!file_exists($mostRecentLogFileName)) {
-            if (!is_dir(dirname($mostRecentLogFileName))) {
-                mkdir(dirname($mostRecentLogFileName), 0777, true);
-            }
-            touch($mostRecentLogFileName);
-        }
+        FileSystem::createFileOrDirIfNotExists($mostRecentLogFileName, true);
 
         if(self::isMostRecentLogFileFromYesterday()) {
             self::makeRoomForNewLogFile($mostRecentLogFileName);