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Translate brook promise and channel into RxJS.
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Namespace('brook.rxjsbridge') | |
.use('brook promise') | |
.define(function(ns) { | |
'use strict'; | |
var observableFromPromise = function(promise, value) { | |
return Rx.Observable.create(function(observer) { | |
var called = false; | |
var throwIfCalled = function() { | |
if (called) { | |
throw new Error('promise resolved twice.'); | |
} | |
called = true; | |
}; | |
var observerPromise = ns.promise(function(n, v) { | |
throwIfCalled(); | |
if (observer) { | |
observer.onNext(v); | |
observer.onComplete(); | |
} | |
n(v); | |
}); | |
observerPromise.setErrorHandler(function(e) { | |
throwIfCalled(); | |
if (observer) { | |
observer.onError(e); | |
} | |
}); | |
observerPromise.run(value); | |
return function() { | |
observer = null; | |
}; | |
}); | |
}; | |
var observableFromChannel = function(channel) { | |
return Rx.Observable.create(function(observer) { | |
var observerPromise = ns.promise(function(n, v) { | |
observer.onNext(v); | |
n(v); | |
}); | |
channel.observe(observerPromise); | |
return function() { | |
channel.stopObserving(observerPromise); | |
}; | |
}); | |
}; | |
ns.provide({ | |
observableFromPromise: observableFromPromise, | |
observableFromChannel: observableFromChannel | |
}); | |
}); |
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