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126 lines (101 loc) · 2.92 KB
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import {int, global, isPresent} from 'angular2/src/facade/lang';
import {List} from 'angular2/src/facade/collection';
import Rx from 'rx/dist/rx.all';
export var Promise = global.Promise;
export class PromiseWrapper {
static resolve(obj):Promise {
return Promise.resolve(obj);
}
static reject(obj):Promise {
return Promise.reject(obj);
}
// Note: We can't rename this method into `catch`, as this is not a valid
// method name in Dart.
static catchError(promise:Promise, onError:Function):Promise {
return promise.catch(onError);
}
static all(promises:List):Promise {
if (promises.length == 0) return Promise.resolve([]);
return Promise.all(promises);
}
static then(promise:Promise, success:Function, rejection:Function):Promise {
return promise.then(success, rejection);
}
static completer() {
var resolve;
var reject;
var p = new Promise(function(res, rej) {
resolve = res;
reject = rej;
});
return {
promise: p,
resolve: resolve,
reject: reject
};
}
static setTimeout(fn:Function, millis:int) {
global.setTimeout(fn, millis);
}
static isPromise(maybePromise):boolean {
return maybePromise instanceof Promise;
}
}
export class ObservableWrapper {
static subscribe(emitter:EventEmitter, onNext, onThrow = null, onReturn = null) {
return emitter.observer({next: onNext, throw: onThrow, return: onReturn});
}
static dispose(subscription:any) {
subscription.dispose();
}
static isObservable(obs):boolean {
return obs instanceof Observable;
}
static callNext(emitter:EventEmitter, value:any) {
emitter.next(value);
}
static callThrow(emitter:EventEmitter, error:any) {
emitter.throw(error);
}
static callReturn(emitter:EventEmitter) {
emitter.return();
}
}
//TODO: vsavkin change to interface
export class Observable {
observer(generator:Function){}
}
/**
* Use Rx.Observable but provides an adapter to make it work as specified here:
* https://github.com/jhusain/observable-spec
*
* Once a reference implementation of the spec is available, switch to it.
*/
export class EventEmitter extends Observable {
_subject:Rx.Subject;
constructor() {
super();
this._subject = new Rx.Subject();
}
observer(generator) {
// Rx.Scheduler.immediate and setTimeout is a workaround, so Rx works with zones.js.
// Once https://github.com/angular/zone.js/issues/51 is fixed, the hack should be removed.
return this._subject.observeOn(Rx.Scheduler.immediate).subscribe(
(value) => {setTimeout(() => generator.next(value));},
(error) => generator.throw ? generator.throw(error) : null,
() => generator.return ? generator.return() : null
);
}
toRx():Rx.Observable {
return this._subject;
}
next(value) {
this._subject.onNext(value);
}
throw(error) {
this._subject.onError(error);
}
return(value) {
this._subject.onCompleted();
}
}