| /** |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| */ |
| |
| /* jshint quotmark:false */ |
| |
| var events = require('./events'); |
| var Q = require('q'); |
| |
| function ActionStack () { |
| this.stack = []; |
| this.completed = []; |
| } |
| |
| ActionStack.prototype = { |
| createAction: function (handler, action_params, reverter, revert_params) { |
| return { |
| handler: { |
| run: handler, |
| params: action_params |
| }, |
| reverter: { |
| run: reverter, |
| params: revert_params |
| } |
| }; |
| }, |
| push: function (tx) { |
| this.stack.push(tx); |
| }, |
| // Returns a promise. |
| process: function (platform) { |
| events.emit('verbose', 'Beginning processing of action stack for ' + platform + ' project...'); |
| |
| while (this.stack.length) { |
| var action = this.stack.shift(); |
| var handler = action.handler.run; |
| var action_params = action.handler.params; |
| |
| try { |
| handler.apply(null, action_params); |
| } catch (e) { |
| events.emit('warn', 'Error during processing of action! Attempting to revert...'); |
| this.stack.unshift(action); |
| var issue = 'Uh oh!\n'; |
| // revert completed tasks |
| while (this.completed.length) { |
| var undo = this.completed.shift(); |
| var revert = undo.reverter.run; |
| var revert_params = undo.reverter.params; |
| |
| try { |
| revert.apply(null, revert_params); |
| } catch (err) { |
| events.emit('warn', 'Error during reversion of action! We probably really messed up your project now, sorry! D:'); |
| issue += 'A reversion action failed: ' + err.message + '\n'; |
| } |
| } |
| e.message = issue + e.message; |
| return Q.reject(e); |
| } |
| this.completed.push(action); |
| } |
| events.emit('verbose', 'Action stack processing complete.'); |
| |
| return Q(); |
| } |
| }; |
| |
| module.exports = ActionStack; |