| /* |
| * 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. |
| */ |
| import Ember from 'ember'; |
| export default Ember.Object.create({ |
| findPath(source, target){ |
| var visitedNodes = []; |
| var currentPath = []; |
| var allPaths = []; |
| this._findPath(source, target, visitedNodes, currentPath, 0, allPaths); |
| return allPaths; |
| }, |
| _findPath(source, target, visitedNodes, currentPath, pathIndex, allPaths){ |
| visitedNodes.pushObject(source); |
| currentPath[pathIndex++] = source; |
| if(source.id === target.id){ |
| if(!allPaths[allPaths.length]){ |
| var index = currentPath.indexOf(target); |
| allPaths[allPaths.length] = currentPath.slice(0, index+1); |
| } |
| } |
| if(source.hasTransition()){ |
| source.transitions.forEach((transition)=>{ |
| var node = transition.targetNode; |
| if(node.hasTransition() && !visitedNodes.findBy('id', node.id)){ |
| this._findPath(node, target, visitedNodes, currentPath, pathIndex, allPaths); |
| } |
| }, this); |
| } |
| pathIndex--; |
| visitedNodes.removeObject(source); |
| }, |
| _getAllNodes(workflow){ |
| var workflowNodes = []; |
| workflow.nodeVisitor.process(workflow.startNode, (node) =>{ |
| workflowNodes.pushObject(node); |
| }); |
| return workflowNodes; |
| }, |
| findValidTransitionsTo(workflow, node){ |
| var validTransitionsTo = []; |
| if(!node.hasTransition()){ |
| return validTransitionsTo; |
| } |
| var paths = this.findPath(workflow.get('startNode'), node); |
| var workflowNodes = this._getAllNodes(workflow); |
| validTransitionsTo = workflowNodes.slice(); |
| workflowNodes.forEach((node)=>{ |
| paths.forEach((path)=>{ |
| if(path.contains(node)){ |
| validTransitionsTo.removeObject(node); |
| } |
| }, this); |
| }, this); |
| validTransitionsTo = validTransitionsTo.reject((node)=>{ |
| return node.get('type') === 'placeholder' || node.get('type') === 'kill'; |
| }, this); |
| return validTransitionsTo; |
| } |
| }); |