refactor(app): add core package

src/app/haxe/ru/m/cache/StorageCache.hx

@@ -0,0 +1,38 @@
+package ru.m.cache;
+
+import flash.net.SharedObject;
+import haxe.crypto.Md5;
+import haxe.io.Bytes;
+
+class StorageCache {
+    private static var DATA_KEY:String = "data";
+
+    private var name:String;
+
+    public function new() {
+        name = "cache";
+    }
+
+    private function resolveDataObject(key:String):SharedObject {
+        return SharedObject.getLocal('${name}/${Md5.encode(key)}');
+    }
+
+    public function exists(key:String):Bool {
+        var dataObject = resolveDataObject(key);
+        return Reflect.hasField(dataObject.data, DATA_KEY);
+    }
+
+    public function get(key:String):Null<Bytes> {
+        var dataObject = resolveDataObject(key);
+        if (Reflect.hasField(dataObject.data, DATA_KEY)) {
+            return Bytes.ofHex(Reflect.field(dataObject.data, DATA_KEY));
+        }
+        return null;
+    }
+
+    public function set(key:String, data:Bytes):Void {
+        var dataObject = resolveDataObject(key);
+        dataObject.setProperty(DATA_KEY, data.toHex());
+        dataObject.flush();
+    }
+}