subscribeToResult.js
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"use strict";
var root_1 = require('./root');
var isArray_1 = require('./isArray');
var isPromise_1 = require('./isPromise');
var isObject_1 = require('./isObject');
var Observable_1 = require('../Observable');
var iterator_1 = require('../symbol/iterator');
var InnerSubscriber_1 = require('../InnerSubscriber');
var observable_1 = require('../symbol/observable');
function subscribeToResult(outerSubscriber, result, outerValue, outerIndex) {
var destination = new InnerSubscriber_1.InnerSubscriber(outerSubscriber, outerValue, outerIndex);
if (destination.closed) {
return null;
}
if (result instanceof Observable_1.Observable) {
if (result._isScalar) {
destination.next(result.value);
destination.complete();
return null;
}
else {
return result.subscribe(destination);
}
}
else if (isArray_1.isArray(result)) {
for (var i = 0, len = result.length; i < len && !destination.closed; i++) {
destination.next(result[i]);
}
if (!destination.closed) {
destination.complete();
}
}
else if (isPromise_1.isPromise(result)) {
result.then(function (value) {
if (!destination.closed) {
destination.next(value);
destination.complete();
}
}, function (err) { return destination.error(err); })
.then(null, function (err) {
// Escaping the Promise trap: globally throw unhandled errors
root_1.root.setTimeout(function () { throw err; });
});
return destination;
}
else if (result && typeof result[iterator_1.$$iterator] === 'function') {
var iterator = result[iterator_1.$$iterator]();
do {
var item = iterator.next();
if (item.done) {
destination.complete();
break;
}
destination.next(item.value);
if (destination.closed) {
break;
}
} while (true);
}
else if (result && typeof result[observable_1.$$observable] === 'function') {
var obs = result[observable_1.$$observable]();
if (typeof obs.subscribe !== 'function') {
destination.error(new TypeError('Provided object does not correctly implement Symbol.observable'));
}
else {
return obs.subscribe(new InnerSubscriber_1.InnerSubscriber(outerSubscriber, outerValue, outerIndex));
}
}
else {
var value = isObject_1.isObject(result) ? 'an invalid object' : "'" + result + "'";
var msg = ("You provided " + value + " where a stream was expected.")
+ ' You can provide an Observable, Promise, Array, or Iterable.';
destination.error(new TypeError(msg));
}
return null;
}
exports.subscribeToResult = subscribeToResult;
//# sourceMappingURL=subscribeToResult.js.map