combineLatest.js
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"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.combineLatestInit = exports.combineLatest = void 0;
var Observable_1 = require("../Observable");
var argsArgArrayOrObject_1 = require("../util/argsArgArrayOrObject");
var from_1 = require("./from");
var identity_1 = require("../util/identity");
var mapOneOrManyArgs_1 = require("../util/mapOneOrManyArgs");
var args_1 = require("../util/args");
var createObject_1 = require("../util/createObject");
var OperatorSubscriber_1 = require("../operators/OperatorSubscriber");
var executeSchedule_1 = require("../util/executeSchedule");
function combineLatest() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var scheduler = args_1.popScheduler(args);
var resultSelector = args_1.popResultSelector(args);
var _a = argsArgArrayOrObject_1.argsArgArrayOrObject(args), observables = _a.args, keys = _a.keys;
if (observables.length === 0) {
return from_1.from([], scheduler);
}
var result = new Observable_1.Observable(combineLatestInit(observables, scheduler, keys
?
function (values) { return createObject_1.createObject(keys, values); }
:
identity_1.identity));
return resultSelector ? result.pipe(mapOneOrManyArgs_1.mapOneOrManyArgs(resultSelector)) : result;
}
exports.combineLatest = combineLatest;
function combineLatestInit(observables, scheduler, valueTransform) {
if (valueTransform === void 0) { valueTransform = identity_1.identity; }
return function (subscriber) {
maybeSchedule(scheduler, function () {
var length = observables.length;
var values = new Array(length);
var active = length;
var remainingFirstValues = length;
var _loop_1 = function (i) {
maybeSchedule(scheduler, function () {
var source = from_1.from(observables[i], scheduler);
var hasFirstValue = false;
source.subscribe(OperatorSubscriber_1.createOperatorSubscriber(subscriber, function (value) {
values[i] = value;
if (!hasFirstValue) {
hasFirstValue = true;
remainingFirstValues--;
}
if (!remainingFirstValues) {
subscriber.next(valueTransform(values.slice()));
}
}, function () {
if (!--active) {
subscriber.complete();
}
}));
}, subscriber);
};
for (var i = 0; i < length; i++) {
_loop_1(i);
}
}, subscriber);
};
}
exports.combineLatestInit = combineLatestInit;
function maybeSchedule(scheduler, execute, subscription) {
if (scheduler) {
executeSchedule_1.executeSchedule(subscription, scheduler, execute);
}
else {
execute();
}
}
//# sourceMappingURL=combineLatest.js.map