Fix bugs, improve perfs and use SimpleLogger instead of Monolog

app/Core/FileCache.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace Core;
+
+class FileCache extends Cache
+{
+    const CACHE_FOLDER = 'data/cache/';
+
+    public function init()
+    {
+        if (! is_dir(self::CACHE_FOLDER)) {
+            mkdir(self::CACHE_FOLDER);
+        }
+    }
+
+    public function set($key, $value)
+    {
+        file_put_contents(self::CACHE_FOLDER.$key, json_encode($value));
+    }
+
+    public function get($key)
+    {
+        if (file_exists(self::CACHE_FOLDER.$key)) {
+            return json_decode(file_get_contents(self::CACHE_FOLDER.$key), true);
+        }
+
+        return null;
+    }
+
+    public function flush()
+    {
+        foreach (glob(self::CACHE_FOLDER.'*') as $filename) {
+            @unlink($filename);
+        }
+    }
+
+    public function remove($key)
+    {
+        @unlink(self::CACHE_FOLDER.$key);
+    }
+}