wishthis/node_modules/rxjs/_esm5/internal/observable/zip.js

/** PURE_IMPORTS_START tslib,_fromArray,_util_isArray,_Subscriber,_.._internal_symbol_iterator,_innerSubscribe PURE_IMPORTS_END */
import * as tslib_1 from "tslib";
import { fromArray } from './fromArray';
import { isArray } from '../util/isArray';
import { Subscriber } from '../Subscriber';
import { iterator as Symbol_iterator } from '../../internal/symbol/iterator';
import { SimpleOuterSubscriber, SimpleInnerSubscriber, innerSubscribe } from '../innerSubscribe';
export function zip() {
    var observables = [];
    for (var _i = 0; _i < arguments.length; _i++) {
        observables[_i] = arguments[_i];
    }
    var resultSelector = observables[observables.length - 1];
    if (typeof resultSelector === 'function') {
        observables.pop();
    }
    return fromArray(observables, undefined).lift(new ZipOperator(resultSelector));
}
var ZipOperator = /*@__PURE__*/ (function () {
    function ZipOperator(resultSelector) {
        this.resultSelector = resultSelector;
    }
    ZipOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new ZipSubscriber(subscriber, this.resultSelector));
    };
    return ZipOperator;
}());
export { ZipOperator };
var ZipSubscriber = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(ZipSubscriber, _super);
    function ZipSubscriber(destination, resultSelector, values) {
        if (values === void 0) {
            values = Object.create(null);
        }
        var _this = _super.call(this, destination) || this;
        _this.resultSelector = resultSelector;
        _this.iterators = [];
        _this.active = 0;
        _this.resultSelector = (typeof resultSelector === 'function') ? resultSelector : undefined;
        return _this;
    }
    ZipSubscriber.prototype._next = function (value) {
        var iterators = this.iterators;
        if (isArray(value)) {
            iterators.push(new StaticArrayIterator(value));
        }
        else if (typeof value[Symbol_iterator] === 'function') {
            iterators.push(new StaticIterator(value[Symbol_iterator]()));
        }
        else {
            iterators.push(new ZipBufferIterator(this.destination, this, value));
        }
    };
    ZipSubscriber.prototype._complete = function () {
        var iterators = this.iterators;
        var len = iterators.length;
        this.unsubscribe();
        if (len === 0) {
            this.destination.complete();
            return;
        }
        this.active = len;
        for (var i = 0; i < len; i++) {
            var iterator = iterators[i];
            if (iterator.stillUnsubscribed) {
                var destination = this.destination;
                destination.add(iterator.subscribe());
            }
            else {
                this.active--;
            }
        }
    };
    ZipSubscriber.prototype.notifyInactive = function () {
        this.active--;
        if (this.active === 0) {
            this.destination.complete();
        }
    };
    ZipSubscriber.prototype.checkIterators = function () {
        var iterators = this.iterators;
        var len = iterators.length;
        var destination = this.destination;
        for (var i = 0; i < len; i++) {
            var iterator = iterators[i];
            if (typeof iterator.hasValue === 'function' && !iterator.hasValue()) {
                return;
            }
        }
        var shouldComplete = false;
        var args = [];
        for (var i = 0; i < len; i++) {
            var iterator = iterators[i];
            var result = iterator.next();
            if (iterator.hasCompleted()) {
                shouldComplete = true;
            }
            if (result.done) {
                destination.complete();
                return;
            }
            args.push(result.value);
        }
        if (this.resultSelector) {
            this._tryresultSelector(args);
        }
        else {
            destination.next(args);
        }
        if (shouldComplete) {
            destination.complete();
        }
    };
    ZipSubscriber.prototype._tryresultSelector = function (args) {
        var result;
        try {
            result = this.resultSelector.apply(this, args);
        }
        catch (err) {
            this.destination.error(err);
            return;
        }
        this.destination.next(result);
    };
    return ZipSubscriber;
}(Subscriber));
export { ZipSubscriber };
var StaticIterator = /*@__PURE__*/ (function () {
    function StaticIterator(iterator) {
        this.iterator = iterator;
        this.nextResult = iterator.next();
    }
    StaticIterator.prototype.hasValue = function () {
        return true;
    };
    StaticIterator.prototype.next = function () {
        var result = this.nextResult;
        this.nextResult = this.iterator.next();
        return result;
    };
    StaticIterator.prototype.hasCompleted = function () {
        var nextResult = this.nextResult;
        return Boolean(nextResult && nextResult.done);
    };
    return StaticIterator;
}());
var StaticArrayIterator = /*@__PURE__*/ (function () {
    function StaticArrayIterator(array) {
        this.array = array;
        this.index = 0;
        this.length = 0;
        this.length = array.length;
    }
    StaticArrayIterator.prototype[Symbol_iterator] = function () {
        return this;
    };
    StaticArrayIterator.prototype.next = function (value) {
        var i = this.index++;
        var array = this.array;
        return i < this.length ? { value: array[i], done: false } : { value: null, done: true };
    };
    StaticArrayIterator.prototype.hasValue = function () {
        return this.array.length > this.index;
    };
    StaticArrayIterator.prototype.hasCompleted = function () {
        return this.array.length === this.index;
    };
    return StaticArrayIterator;
}());
var ZipBufferIterator = /*@__PURE__*/ (function (_super) {
    tslib_1.__extends(ZipBufferIterator, _super);
    function ZipBufferIterator(destination, parent, observable) {
        var _this = _super.call(this, destination) || this;
        _this.parent = parent;
        _this.observable = observable;
        _this.stillUnsubscribed = true;
        _this.buffer = [];
        _this.isComplete = false;
        return _this;
    }
    ZipBufferIterator.prototype[Symbol_iterator] = function () {
        return this;
    };
    ZipBufferIterator.prototype.next = function () {
        var buffer = this.buffer;
        if (buffer.length === 0 && this.isComplete) {
            return { value: null, done: true };
        }
        else {
            return { value: buffer.shift(), done: false };
        }
    };
    ZipBufferIterator.prototype.hasValue = function () {
        return this.buffer.length > 0;
    };
    ZipBufferIterator.prototype.hasCompleted = function () {
        return this.buffer.length === 0 && this.isComplete;
    };
    ZipBufferIterator.prototype.notifyComplete = function () {
        if (this.buffer.length > 0) {
            this.isComplete = true;
            this.parent.notifyInactive();
        }
        else {
            this.destination.complete();
        }
    };
    ZipBufferIterator.prototype.notifyNext = function (innerValue) {
        this.buffer.push(innerValue);
        this.parent.checkIterators();
    };
    ZipBufferIterator.prototype.subscribe = function () {
        return innerSubscribe(this.observable, new SimpleInnerSubscriber(this));
    };
    return ZipBufferIterator;
}(SimpleOuterSubscriber));
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