121 lines
2.7 KiB
JavaScript
121 lines
2.7 KiB
JavaScript
import _classCallCheck from 'babel-runtime/helpers/classCallCheck';
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import _createClass from 'babel-runtime/helpers/createClass';
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/*
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Copyright 2013-2015 ASIAL CORPORATION
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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var generateId = function () {
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var i = 0;
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return function () {
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return i++;
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};
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}();
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/**
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* Door locking system.
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*
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* @param {Object} [options]
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* @param {Function} [options.log]
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*/
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var DoorLock = function () {
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function DoorLock() {
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var options = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
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_classCallCheck(this, DoorLock);
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this._lockList = [];
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this._waitList = [];
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this._log = options.log || function () {};
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}
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/**
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* Register a lock.
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*
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* @return {Function} Callback for unlocking.
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*/
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_createClass(DoorLock, [{
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key: 'lock',
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value: function lock() {
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var _this = this;
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var unlock = function unlock() {
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_this._unlock(unlock);
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};
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unlock.id = generateId();
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this._lockList.push(unlock);
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this._log('lock: ' + unlock.id);
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return unlock;
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}
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}, {
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key: '_unlock',
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value: function _unlock(fn) {
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var index = this._lockList.indexOf(fn);
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if (index === -1) {
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throw new Error('This function is not registered in the lock list.');
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}
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this._lockList.splice(index, 1);
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this._log('unlock: ' + fn.id);
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this._tryToFreeWaitList();
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}
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}, {
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key: '_tryToFreeWaitList',
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value: function _tryToFreeWaitList() {
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while (!this.isLocked() && this._waitList.length > 0) {
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this._waitList.shift()();
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}
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}
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/**
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* Register a callback for waiting unlocked door.
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*
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* @params {Function} callback Callback on unlocking the door completely.
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*/
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}, {
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key: 'waitUnlock',
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value: function waitUnlock(callback) {
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if (!(callback instanceof Function)) {
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throw new Error('The callback param must be a function.');
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}
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if (this.isLocked()) {
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this._waitList.push(callback);
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} else {
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callback();
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}
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}
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/**
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* @return {Boolean}
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*/
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}, {
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key: 'isLocked',
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value: function isLocked() {
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return this._lockList.length > 0;
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}
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}]);
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return DoorLock;
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}();
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export default DoorLock; |