Created
April 14, 2014 18:45
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class Promise<X> { | |
map<B>(onValue: (x: X) => B): Promise<B> { | |
AS.assertParameter(onValue, "onValue"); | |
return new Promise<B>((resolve, reject) => { | |
this.parsePromise.then(x => { | |
resolve(onValue(x)); | |
}, e => { | |
reject(e); | |
return Parse.Promise.as(); | |
}); | |
}); | |
} | |
then<B>(onValue: (x: X) => Promise<B>, onError?: (err: any) => Promise<B>): Promise<B> { | |
AS.assertParameter(onValue, "onValue"); | |
return new Promise<B>((resolve, reject) => { | |
this.parsePromise.then(x => { | |
resolveCallback(x, onValue, resolve, reject); | |
}, e => { | |
resolveCallback(e, onError, resolve, reject); | |
return Parse.Promise.as(); | |
}); | |
}); | |
} | |
} | |
function resolveCallback<X,B>( | |
value: X, | |
callback: (x: X) => any, | |
resolve: (x?: B) => void, | |
reject: (e: any) => void | |
): void { | |
var val = callback(value); | |
AS.assert("Expected " + val + " to be promise", () => Promise.is(val)); | |
val.parsePromise.then((y: B) => { | |
resolve(y); | |
}, (err: any) => { | |
reject(err); | |
return Parse.Promise.as(); | |
}); | |
} |
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