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();
    }
}