feat(Core): add optimize and complete code

app/Core/Cache.php

@@ -20,6 +20,10 @@ class Cache {
      * Get cached value
      */
     public function get($key, $group = 'sodino') {
+        if (!$this->isEnabled()) {
+            return false;
+        }
+
         $full_key = $this->buildKey($key, $group);
         
         // Check memory cache first
@@ -42,6 +46,10 @@ class Cache {
      * Set cached value
      */
     public function set($key, $value, $expiration = 3600, $group = 'sodino') {
+        if (!$this->isEnabled()) {
+            return false;
+        }
+
         $full_key = $this->buildKey($key, $group);
         
         // Set in memory cache
@@ -134,4 +142,12 @@ class Cache {
     private function buildKey($key, $group) {
         return "sodino_{$group}_{$key}";
     }
+
+    private function isEnabled() {
+        if (!class_exists(__NAMESPACE__ . '\Settings')) {
+            return true;
+        }
+
+        return Settings::getInstance()->isCacheEnabled();
+    }
 }