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/** PURE_IMPORTS_START _util_isArray,_util_isObject,_util_isFunction,_util_UnsubscriptionError PURE_IMPORTS_END */
import { isArray } from './util/isArray';
import { isObject } from './util/isObject';
import { isFunction } from './util/isFunction';
import { UnsubscriptionError } from './util/UnsubscriptionError';
var Subscription = /*@__PURE__*/ (function () {
function Subscription(unsubscribe) {
this.closed = false;
this._parent = null;
this._parents = null;
this._subscriptions = null;
if (unsubscribe) {
this._unsubscribe = unsubscribe;
}
}
Subscription.prototype.unsubscribe = function () {
var hasErrors = false;
var errors;
if (this.closed) {
return;
}
var _a = this, _parent = _a._parent, _parents = _a._parents, _unsubscribe = _a._unsubscribe, _subscriptions = _a._subscriptions;
this.closed = true;
this._parent = null;
this._parents = null;
this._subscriptions = null;
var index = -1;
var len = _parents ? _parents.length : 0;
while (_parent) {
_parent.remove(this);
_parent = ++index < len && _parents[index] || null;
}
if (isFunction(_unsubscribe)) {
try {
_unsubscribe.call(this);
}
catch (e) {
hasErrors = true;
errors = e instanceof UnsubscriptionError ? flattenUnsubscriptionErrors(e.errors) : [e];
}
}
if (isArray(_subscriptions)) {
index = -1;
len = _subscriptions.length;
while (++index < len) {
var sub = _subscriptions[index];
if (isObject(sub)) {
try {
sub.unsubscribe();
}
catch (e) {
hasErrors = true;
errors = errors || [];
if (e instanceof UnsubscriptionError) {
errors = errors.concat(flattenUnsubscriptionErrors(e.errors));
}
else {
errors.push(e);
}
}
}
}
}
if (hasErrors) {
throw new UnsubscriptionError(errors);
}
};
Subscription.prototype.add = function (teardown) {
var subscription = teardown;
switch (typeof teardown) {
case 'function':
subscription = new Subscription(teardown);
case 'object':
if (subscription === this || subscription.closed || typeof subscription.unsubscribe !== 'function') {
return subscription;
}
else if (this.closed) {
subscription.unsubscribe();
return subscription;
}
else if (!(subscription instanceof Subscription)) {
var tmp = subscription;
subscription = new Subscription();
subscription._subscriptions = [tmp];
}
break;
default: {
if (!teardown) {
return Subscription.EMPTY;
}
throw new Error('unrecognized teardown ' + teardown + ' added to Subscription.');
}
}
if (subscription._addParent(this)) {
var subscriptions = this._subscriptions;
if (subscriptions) {
subscriptions.push(subscription);
}
else {
this._subscriptions = [subscription];
}
}
return subscription;
};
Subscription.prototype.remove = function (subscription) {
var subscriptions = this._subscriptions;
if (subscriptions) {
var subscriptionIndex = subscriptions.indexOf(subscription);
if (subscriptionIndex !== -1) {
subscriptions.splice(subscriptionIndex, 1);
}
}
};
Subscription.prototype._addParent = function (parent) {
var _a = this, _parent = _a._parent, _parents = _a._parents;
if (_parent === parent) {
return false;
}
else if (!_parent) {
this._parent = parent;
return true;
}
else if (!_parents) {
this._parents = [parent];
return true;
}
else if (_parents.indexOf(parent) === -1) {
_parents.push(parent);
return true;
}
return false;
};
Subscription.EMPTY = (function (empty) {
empty.closed = true;
return empty;
}(new Subscription()));
return Subscription;
}());
export { Subscription };
function flattenUnsubscriptionErrors(errors) {
return errors.reduce(function (errs, err) { return errs.concat((err instanceof UnsubscriptionError) ? err.errors : err); }, []);
}
//# sourceMappingURL=Subscription.js.map
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