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60 lines
1.7 KiB
JavaScript
60 lines
1.7 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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module.metadata = {
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"stability": "unstable"
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};
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const { EventEmitter } = require('../deprecated/events');
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const unload = require('../system/unload');
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const Registry = EventEmitter.compose({
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_registry: null,
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_constructor: null,
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constructor: function Registry(constructor) {
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this._registry = [];
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this._constructor = constructor;
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this.on('error', this._onError = this._onError.bind(this));
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unload.ensure(this, "_destructor");
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},
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_destructor: function _destructor() {
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let _registry = this._registry.slice(0);
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for (let instance of _registry)
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this._emit('remove', instance);
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this._registry.splice(0);
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},
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_onError: function _onError(e) {
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if (!this._listeners('error').length)
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console.error(e);
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},
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has: function has(instance) {
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let _registry = this._registry;
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return (
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(0 <= _registry.indexOf(instance)) ||
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(instance && instance._public && 0 <= _registry.indexOf(instance._public))
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);
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},
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add: function add(instance) {
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let { _constructor, _registry } = this;
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if (!(instance instanceof _constructor))
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instance = new _constructor(instance);
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if (0 > _registry.indexOf(instance)) {
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_registry.push(instance);
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this._emit('add', instance);
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}
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return instance;
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},
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remove: function remove(instance) {
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let _registry = this._registry;
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let index = _registry.indexOf(instance)
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if (0 <= index) {
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this._emit('remove', instance);
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_registry.splice(index, 1);
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}
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}
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});
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exports.Registry = Registry;
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