(function(){
    class LNPromise
    {
        constructor(executor, label){
            this.promise = new Promise(
                (resolve,reject) => {
                    this.resolve = (v) => {
                        this._s.state = "ready";
                        resolve(v);
                        this.release();
                    },
                    this.reject = (e) => {
                        this._s.state = "failed";
                        reject(e);
                        this.release();
                    }
                    executor && executor(
                        this.resolve,
                        this.reject
                    );
                }
            );

            if (!label)
                label = "N.D.";

            this._s = {
                label,
                state: "waiting"
            };

            this.idx = LN.$unique();
            LNPromise.$current[this.idx] = this._s;
        }

        label(){
            return this._s.label;
        }

        state(){
            return this._s.state;
        }

        release(){
            setTimeout(()=>{
                Vue.delete(LNPromise.$current, this.idx);
            },1000);
        }

        then(){
            return this.promise.then.apply(this.promise, arguments);
        }

        static getCurrentPromises(){ return LNPromise.$current; }
    }
    LNPromise.$current = {};

    LN.$add("LN.Promise",LNPromise);
})();