ducha-qianduan/node_modules/rxjs/internal/operators/groupBy.js

"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 Subscriber_1 = require("../Subscriber");
var Subscription_1 = require("../Subscription");
var Observable_1 = require("../Observable");
var Subject_1 = require("../Subject");
function groupBy(keySelector, elementSelector, durationSelector, subjectSelector) {
    return function (source) {
        return source.lift(new GroupByOperator(keySelector, elementSelector, durationSelector, subjectSelector));
    };
}
exports.groupBy = groupBy;
var GroupByOperator = (function () {
    function GroupByOperator(keySelector, elementSelector, durationSelector, subjectSelector) {
        this.keySelector = keySelector;
        this.elementSelector = elementSelector;
        this.durationSelector = durationSelector;
        this.subjectSelector = subjectSelector;
    }
    GroupByOperator.prototype.call = function (subscriber, source) {
        return source.subscribe(new GroupBySubscriber(subscriber, this.keySelector, this.elementSelector, this.durationSelector, this.subjectSelector));
    };
    return GroupByOperator;
}());
var GroupBySubscriber = (function (_super) {
    __extends(GroupBySubscriber, _super);
    function GroupBySubscriber(destination, keySelector, elementSelector, durationSelector, subjectSelector) {
        var _this = _super.call(this, destination) || this;
        _this.keySelector = keySelector;
        _this.elementSelector = elementSelector;
        _this.durationSelector = durationSelector;
        _this.subjectSelector = subjectSelector;
        _this.groups = null;
        _this.attemptedToUnsubscribe = false;
        _this.count = 0;
        return _this;
    }
    GroupBySubscriber.prototype._next = function (value) {
        var key;
        try {
            key = this.keySelector(value);
        }
        catch (err) {
            this.error(err);
            return;
        }
        this._group(value, key);
    };
    GroupBySubscriber.prototype._group = function (value, key) {
        var groups = this.groups;
        if (!groups) {
            groups = this.groups = new Map();
        }
        var group = groups.get(key);
        var element;
        if (this.elementSelector) {
            try {
                element = this.elementSelector(value);
            }
            catch (err) {
                this.error(err);
            }
        }
        else {
            element = value;
        }
        if (!group) {
            group = (this.subjectSelector ? this.subjectSelector() : new Subject_1.Subject());
            groups.set(key, group);
            var groupedObservable = new GroupedObservable(key, group, this);
            this.destination.next(groupedObservable);
            if (this.durationSelector) {
                var duration = void 0;
                try {
                    duration = this.durationSelector(new GroupedObservable(key, group));
                }
                catch (err) {
                    this.error(err);
                    return;
                }
                this.add(duration.subscribe(new GroupDurationSubscriber(key, group, this)));
            }
        }
        if (!group.closed) {
            group.next(element);
        }
    };
    GroupBySubscriber.prototype._error = function (err) {
        var groups = this.groups;
        if (groups) {
            groups.forEach(function (group, key) {
                group.error(err);
            });
            groups.clear();
        }
        this.destination.error(err);
    };
    GroupBySubscriber.prototype._complete = function () {
        var groups = this.groups;
        if (groups) {
            groups.forEach(function (group, key) {
                group.complete();
            });
            groups.clear();
        }
        this.destination.complete();
    };
    GroupBySubscriber.prototype.removeGroup = function (key) {
        this.groups.delete(key);
    };
    GroupBySubscriber.prototype.unsubscribe = function () {
        if (!this.closed) {
            this.attemptedToUnsubscribe = true;
            if (this.count === 0) {
                _super.prototype.unsubscribe.call(this);
            }
        }
    };
    return GroupBySubscriber;
}(Subscriber_1.Subscriber));
var GroupDurationSubscriber = (function (_super) {
    __extends(GroupDurationSubscriber, _super);
    function GroupDurationSubscriber(key, group, parent) {
        var _this = _super.call(this, group) || this;
        _this.key = key;
        _this.group = group;
        _this.parent = parent;
        return _this;
    }
    GroupDurationSubscriber.prototype._next = function (value) {
        this.complete();
    };
    GroupDurationSubscriber.prototype._unsubscribe = function () {
        var _a = this, parent = _a.parent, key = _a.key;
        this.key = this.parent = null;
        if (parent) {
            parent.removeGroup(key);
        }
    };
    return GroupDurationSubscriber;
}(Subscriber_1.Subscriber));
var GroupedObservable = (function (_super) {
    __extends(GroupedObservable, _super);
    function GroupedObservable(key, groupSubject, refCountSubscription) {
        var _this = _super.call(this) || this;
        _this.key = key;
        _this.groupSubject = groupSubject;
        _this.refCountSubscription = refCountSubscription;
        return _this;
    }
    GroupedObservable.prototype._subscribe = function (subscriber) {
        var subscription = new Subscription_1.Subscription();
        var _a = this, refCountSubscription = _a.refCountSubscription, groupSubject = _a.groupSubject;
        if (refCountSubscription && !refCountSubscription.closed) {
            subscription.add(new InnerRefCountSubscription(refCountSubscription));
        }
        subscription.add(groupSubject.subscribe(subscriber));
        return subscription;
    };
    return GroupedObservable;
}(Observable_1.Observable));
exports.GroupedObservable = GroupedObservable;
var InnerRefCountSubscription = (function (_super) {
    __extends(InnerRefCountSubscription, _super);
    function InnerRefCountSubscription(parent) {
        var _this = _super.call(this) || this;
        _this.parent = parent;
        parent.count++;
        return _this;
    }
    InnerRefCountSubscription.prototype.unsubscribe = function () {
        var parent = this.parent;
        if (!parent.closed && !this.closed) {
            _super.prototype.unsubscribe.call(this);
            parent.count -= 1;
            if (parent.count === 0 && parent.attemptedToUnsubscribe) {
                parent.unsubscribe();
            }
        }
    };
    return InnerRefCountSubscription;
}(Subscription_1.Subscription));
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