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/** PURE_IMPORTS_START _util_isArray,_util_isObject,_util_isFunction,_util_tryCatch,_util_errorObject,_util_UnsubscriptionError PURE_IMPORTS_END */
import { isArray } from './util/isArray';
import { isObject } from './util/isObject';
import { isFunction } from './util/isFunction';
import { tryCatch } from './util/tryCatch';
import { errorObject } from './util/errorObject';
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)) {
var trial = tryCatch(_unsubscribe).call(this);
if (trial === errorObject) {
hasErrors = true;
errors = errors || (errorObject.e instanceof UnsubscriptionError ?
flattenUnsubscriptionErrors(errorObject.e.errors) : [errorObject.e]);
}
}
if (isArray(_subscriptions)) {
index = -1;
len = _subscriptions.length;
while (++index < len) {
var sub = _subscriptions[index];
if (isObject(sub)) {
var trial = tryCatch(sub.unsubscribe).call(sub);
if (trial === errorObject) {
hasErrors = true;
errors = errors || [];
var err = errorObject.e;
if (err instanceof UnsubscriptionError) {
errors = errors.concat(flattenUnsubscriptionErrors(err.errors));
}
else {
errors.push(err);
}
}
}
}
}
if (hasErrors) {
throw new UnsubscriptionError(errors);
}
};
Subscription.prototype.add = function (teardown) {
if (!teardown || (teardown === Subscription.EMPTY)) {
return Subscription.EMPTY;
}
if (teardown === this) {
return this;
}
var subscription = teardown;
switch (typeof teardown) {
case 'function':
subscription = new Subscription(teardown);
case 'object':
if (subscription.closed || typeof subscription.unsubscribe !== 'function') {
return subscription;
}
else if (this.closed) {
subscription.unsubscribe();
return subscription;
}
else if (typeof subscription._addParent !== 'function') {
var tmp = subscription;
subscription = new Subscription();
subscription._subscriptions = [tmp];
}
break;
default:
throw new Error('unrecognized teardown ' + teardown + ' added to Subscription.');
}
var subscriptions = this._subscriptions || (this._subscriptions = []);
subscriptions.push(subscription);
subscription._addParent(this);
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 === parent) {
this._parent = parent;
}
else if (!_parents) {
this._parents = [parent];
}
else if (_parents.indexOf(parent) === -1) {
_parents.push(parent);
}
};
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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