withLatestFrom.js
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"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
}
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var OuterSubscriber_1 = require("../OuterSubscriber");
var subscribeToResult_1 = require("../util/subscribeToResult");
function withLatestFrom() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
return function (source) {
var project;
if (typeof args[args.length - 1] === 'function') {
project = args.pop();
}
var observables = args;
return source.lift(new WithLatestFromOperator(observables, project));
};
}
exports.withLatestFrom = withLatestFrom;
var WithLatestFromOperator = (function () {
function WithLatestFromOperator(observables, project) {
this.observables = observables;
this.project = project;
}
WithLatestFromOperator.prototype.call = function (subscriber, source) {
return source.subscribe(new WithLatestFromSubscriber(subscriber, this.observables, this.project));
};
return WithLatestFromOperator;
}());
var WithLatestFromSubscriber = (function (_super) {
__extends(WithLatestFromSubscriber, _super);
function WithLatestFromSubscriber(destination, observables, project) {
var _this = _super.call(this, destination) || this;
_this.observables = observables;
_this.project = project;
_this.toRespond = [];
var len = observables.length;
_this.values = new Array(len);
for (var i = 0; i < len; i++) {
_this.toRespond.push(i);
}
for (var i = 0; i < len; i++) {
var observable = observables[i];
_this.add(subscribeToResult_1.subscribeToResult(_this, observable, undefined, i));
}
return _this;
}
WithLatestFromSubscriber.prototype.notifyNext = function (_outerValue, innerValue, outerIndex) {
this.values[outerIndex] = innerValue;
var toRespond = this.toRespond;
if (toRespond.length > 0) {
var found = toRespond.indexOf(outerIndex);
if (found !== -1) {
toRespond.splice(found, 1);
}
}
};
WithLatestFromSubscriber.prototype.notifyComplete = function () {
};
WithLatestFromSubscriber.prototype._next = function (value) {
if (this.toRespond.length === 0) {
var args = [value].concat(this.values);
if (this.project) {
this._tryProject(args);
}
else {
this.destination.next(args);
}
}
};
WithLatestFromSubscriber.prototype._tryProject = function (args) {
var result;
try {
result = this.project.apply(this, args);
}
catch (err) {
this.destination.error(err);
return;
}
this.destination.next(result);
};
return WithLatestFromSubscriber;
}(OuterSubscriber_1.OuterSubscriber));
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