node_modules/rxjs/dist/cjs/internal/observable/combineLatest.js

"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();
    }
}
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