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| var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) Eif (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var Subscriber_1 = require('../Subscriber');
var Subscription_1 = require('../Subscription');
var Observable_1 = require('../Observable');
var Subject_1 = require('../Subject');
var Map_1 = require('../util/Map');
var FastMap_1 = require('../util/FastMap');
var tryCatch_1 = require('../util/tryCatch');
var errorObject_1 = require('../util/errorObject');
/**
* Groups the items emitted by an Observable according to a specified criterion,
* and emits these grouped items as `GroupedObservables`, one `GroupedObservable` per group.
*
* <img src="./img/groupBy.png" width="100%">
*
* @param {Function} keySelector - a function that extracts the key for each item
* @param {Function} elementSelector - a function that extracts the return element for each item
* @returns {Observable} an Observable that emits GroupedObservables, each of which corresponds
* to a unique key value and each of which emits those items from the source Observable that share
* that key value.
*/
function groupBy(keySelector, elementSelector, durationSelector) {
return new GroupByObservable(this, keySelector, elementSelector, durationSelector);
}
exports.groupBy = groupBy;
var GroupByObservable = (function (_super) {
__extends(GroupByObservable, _super);
function GroupByObservable(source, keySelector, elementSelector, durationSelector) {
_super.call(this);
this.source = source;
this.keySelector = keySelector;
this.elementSelector = elementSelector;
this.durationSelector = durationSelector;
}
GroupByObservable.prototype._subscribe = function (subscriber) {
var refCountSubscription = new RefCountSubscription();
var groupBySubscriber = new GroupBySubscriber(subscriber, refCountSubscription, this.keySelector, this.elementSelector, this.durationSelector);
refCountSubscription.setPrimary(this.source.subscribe(groupBySubscriber));
return refCountSubscription;
};
return GroupByObservable;
})(Observable_1.Observable);
exports.GroupByObservable = GroupByObservable;
var GroupBySubscriber = (function (_super) {
__extends(GroupBySubscriber, _super);
function GroupBySubscriber(destination, refCountSubscription, keySelector, elementSelector, durationSelector) {
_super.call(this);
this.refCountSubscription = refCountSubscription;
this.keySelector = keySelector;
this.elementSelector = elementSelector;
this.durationSelector = durationSelector;
this.groups = null;
this.destination = destination;
this.add(destination);
}
GroupBySubscriber.prototype._next = function (x) {
var key = tryCatch_1.tryCatch(this.keySelector)(x);
if (key === errorObject_1.errorObject) {
this.error(errorObject_1.errorObject.e);
}
else {
var groups = this.groups;
var elementSelector = this.elementSelector;
var durationSelector = this.durationSelector;
if (!groups) {
groups = this.groups = typeof key === 'string' ? new FastMap_1.FastMap() : new Map_1.Map();
}
var group = groups.get(key);
if (!group) {
groups.set(key, group = new Subject_1.Subject());
var groupedObservable = new GroupedObservable(key, group, this.refCountSubscription);
if (durationSelector) {
var duration = tryCatch_1.tryCatch(durationSelector)(new GroupedObservable(key, group));
if (duration === errorObject_1.errorObject) {
this.error(errorObject_1.errorObject.e);
}
else {
this.add(duration.subscribe(new GroupDurationSubscriber(key, group, this)));
}
}
this.destination.next(groupedObservable);
}
if (elementSelector) {
var value = tryCatch_1.tryCatch(elementSelector)(x);
if (value === errorObject_1.errorObject) {
this.error(errorObject_1.errorObject.e);
}
else {
group.next(value);
}
}
else {
group.next(x);
}
}
};
GroupBySubscriber.prototype._error = function (err) {
var _this = this;
var groups = this.groups;
if (groups) {
groups.forEach(function (group, key) {
group.error(err);
_this.removeGroup(key);
});
}
this.destination.error(err);
};
GroupBySubscriber.prototype._complete = function () {
var _this = this;
var groups = this.groups;
if (groups) {
groups.forEach(function (group, key) {
group.complete();
_this.removeGroup(key);
});
}
this.destination.complete();
};
GroupBySubscriber.prototype.removeGroup = function (key) {
this.groups.delete(key);
};
return GroupBySubscriber;
})(Subscriber_1.Subscriber);
var GroupDurationSubscriber = (function (_super) {
__extends(GroupDurationSubscriber, _super);
function GroupDurationSubscriber(key, group, parent) {
_super.call(this);
this.key = key;
this.group = group;
this.parent = parent;
}
GroupDurationSubscriber.prototype._next = function (value) {
this.group.complete();
this.parent.removeGroup(this.key);
};
GroupDurationSubscriber.prototype._error = function (err) {
this.group.error(err);
this.parent.removeGroup(this.key);
};
GroupDurationSubscriber.prototype._complete = function () {
this.group.complete();
this.parent.removeGroup(this.key);
};
return GroupDurationSubscriber;
})(Subscriber_1.Subscriber);
var RefCountSubscription = (function (_super) {
__extends(RefCountSubscription, _super);
function RefCountSubscription() {
_super.call(this);
this.attemptedToUnsubscribePrimary = false;
this.count = 0;
}
RefCountSubscription.prototype.setPrimary = function (subscription) {
this.primary = subscription;
};
RefCountSubscription.prototype.unsubscribe = function () {
if (!this.isUnsubscribed && !this.attemptedToUnsubscribePrimary) {
this.attemptedToUnsubscribePrimary = true;
if (this.count === 0) {
_super.prototype.unsubscribe.call(this);
this.primary.unsubscribe();
}
}
};
return RefCountSubscription;
})(Subscription_1.Subscription);
exports.RefCountSubscription = RefCountSubscription;
var GroupedObservable = (function (_super) {
__extends(GroupedObservable, _super);
function GroupedObservable(key, groupSubject, refCountSubscription) {
_super.call(this);
this.key = key;
this.groupSubject = groupSubject;
this.refCountSubscription = refCountSubscription;
}
GroupedObservable.prototype._subscribe = function (subscriber) {
var subscription = new Subscription_1.Subscription();
if (this.refCountSubscription && !this.refCountSubscription.isUnsubscribed) {
subscription.add(new InnerRefCountSubscription(this.refCountSubscription));
}
subscription.add(this.groupSubject.subscribe(subscriber));
return subscription;
};
return GroupedObservable;
})(Observable_1.Observable);
exports.GroupedObservable = GroupedObservable;
var InnerRefCountSubscription = (function (_super) {
__extends(InnerRefCountSubscription, _super);
function InnerRefCountSubscription(parent) {
_super.call(this);
this.parent = parent;
parent.count++;
}
InnerRefCountSubscription.prototype.unsubscribe = function () {
Eif (!this.parent.isUnsubscribed && !this.isUnsubscribed) {
_super.prototype.unsubscribe.call(this);
this.parent.count--;
if (this.parent.count === 0 && this.parent.attemptedToUnsubscribePrimary) {
this.parent.unsubscribe();
this.parent.primary.unsubscribe();
}
}
};
return InnerRefCountSubscription;
})(Subscription_1.Subscription);
exports.InnerRefCountSubscription = InnerRefCountSubscription;
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