workflow.js 34 KB

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  1. // Licensed to Cloudera, Inc. under one
  2. // or more contributor license agreements. See the NOTICE file
  3. // distributed with this work for additional information
  4. // regarding copyright ownership. Cloudera, Inc. licenses this file
  5. // to you under the Apache License, Version 2.0 (the
  6. // "License"); you may not use this file except in compliance
  7. // with the License. You may obtain a copy of the License at
  8. //
  9. // http://www.apache.org/licenses/LICENSE-2.0
  10. //
  11. // Unless required by applicable law or agreed to in writing, software
  12. // distributed under the License is distributed on an "AS IS" BASIS,
  13. // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14. // See the License for the specific language governing permissions and
  15. // limitations under the License.
  16. var Registry = RegistryModule($);
  17. var Modal = ModalModule($, ko);
  18. var Node = NodeModule($, IdGeneratorTable, NodeFields);
  19. var StartNode = NodeModule($, IdGeneratorTable, NodeFields);
  20. $.extend(StartNode.prototype, Node.prototype, {
  21. /**
  22. * Same as addChild for nodes, except if we reach the end,
  23. * we add the end node to our child_links in the form of a
  24. * 'related' link and 'start' link.
  25. * We should always have a start link in an empty workflow!
  26. */
  27. replaceChild: function(child, replacement) {
  28. var self = this;
  29. var index = -1;
  30. $.each(self.non_error_links(), function(i, link) {
  31. if (link.child() == child.id()) {
  32. index = i;
  33. }
  34. });
  35. if (index > -1) {
  36. self.child_links.splice(index, 1);
  37. var links = self.child_links.splice(index);
  38. var link = {
  39. parent: ko.observable(self.id()),
  40. child: ko.observable(replacement.id()),
  41. name: ko.observable('to'),
  42. comment: ko.observable('')
  43. };
  44. self.child_links.push(link);
  45. $.each(links, function(index, link) {
  46. self.child_links.push(link);
  47. });
  48. }
  49. return index != -1;
  50. }
  51. });
  52. var ForkNode = NodeModule($, IdGeneratorTable, NodeFields);
  53. $.extend(ForkNode.prototype, Node.prototype, {
  54. // Join nodes are connected through 'related' links
  55. join: function() {
  56. var self = this;
  57. var join = null;
  58. $.each(self.child_links(), function(index, link) {
  59. if (link.name() == 'related') {
  60. join = self.registry.get(link.child());
  61. }
  62. });
  63. return join;
  64. },
  65. /**
  66. * Append a node to the current fork
  67. * Also adds join node to node.
  68. * When adding the join node, append will remove all the children from the join!
  69. * We need to make sure the join remembers its children since append will replace them.
  70. * NOTE: Cannot append a fork or decision! Use addChild or replaceChild instead!
  71. */
  72. append: function(node) {
  73. var self = this;
  74. if (node.node_type() != 'decision' && node.node_type() != 'fork') {
  75. var join = self.join();
  76. if (join.id() != node.id()) {
  77. var children = join.findChildren();
  78. self.addChild(node);
  79. node.append(join);
  80. // remember children
  81. $.each(children, function(index, child) {
  82. join.addChild(child);
  83. });
  84. }
  85. }
  86. },
  87. /**
  88. * Replace child node with another node
  89. * 1. Remove child if the replacement is related join
  90. * 2. Apply Node.replaceChild for all other causes
  91. * NOTE: can assume the only join this fork will ever see is the related join!
  92. * This is because the related will always be the closest join for children.
  93. * Also, the operations allowed that would make this all possible: detach, append;
  94. * are inherently going to remove any other joins if they exist.
  95. * This is also easier given nodes are contained within Forks!
  96. */
  97. replaceChild: function(child, replacement) {
  98. var self = this;
  99. var ret = true;
  100. if (self.join().id() == replacement.id()) {
  101. ret = self.removeChild(child);
  102. } else {
  103. ret = Node.prototype.replaceChild.apply(self, arguments);
  104. }
  105. var links = self.links().filter(function(element, index, arr) {
  106. return self.registry.get(element.child()).node_type() != 'join';
  107. });
  108. if (links.length < 2) {
  109. self.detach();
  110. self.join().detach();
  111. self.erase();
  112. self.join().erase();
  113. }
  114. return ret;
  115. },
  116. /**
  117. * Converts fork node into decision node in the following way:
  118. * 1. Copies contents of current fork node into a new decision node
  119. * 2. Detach fork node
  120. * 3. Erase fork node
  121. * 4. Append decision node to parent
  122. */
  123. convertToDecision: function() {
  124. var self = this;
  125. var join = self.join();
  126. var end = null;
  127. var child = join.findChildren()[0];
  128. // Replace join with decision end
  129. var decision_end_model = new NodeModel({
  130. id: IdGeneratorTable['decisionend'].nextId(),
  131. node_type: 'decisionend',
  132. workflow: self.workflow(),
  133. child_links: join.model.child_links
  134. });
  135. var decision_end_node = new Node(self._workflow, decision_end_model, self.registry);
  136. $.each(decision_end_model.child_links, function(index, link) {
  137. link.parent = decision_end_model.id;
  138. });
  139. var parents = join.findParents();
  140. $.each(parents, function(index, parent) {
  141. parent.replaceChild(join, decision_end_node);
  142. });
  143. // Replace fork with decision node
  144. var decision_model = new DecisionModel({
  145. id: IdGeneratorTable['decision'].nextId(),
  146. name: self.name(),
  147. description: self.description(),
  148. node_type: 'decision',
  149. workflow: self.workflow(),
  150. child_links: self.model.child_links
  151. });
  152. var default_link = {
  153. parent: decision_model.id,
  154. child: self._workflow.end(),
  155. name: 'default',
  156. comment: ''
  157. };
  158. decision_model.child_links.push(default_link);
  159. $.each(decision_model.child_links, function(index, link) {
  160. link.parent = decision_model.id;
  161. });
  162. var parents = self.findParents();
  163. var decision_node = new DecisionNode(self._workflow, decision_model, self.registry);
  164. decision_node.removeChild(join);
  165. decision_node.addChild(decision_end_node);
  166. $.each(parents, function(index, parent) {
  167. parent.replaceChild(self, decision_node);
  168. });
  169. // Get rid of fork and join in registry
  170. join.erase();
  171. self.erase();
  172. // Add decision and decision end to registry
  173. self.registry.add(decision_node.id(), decision_node);
  174. self.registry.add(decision_end_node.id(), decision_end_node);
  175. }
  176. });
  177. var DecisionNode = NodeModule($, IdGeneratorTable, NodeFields);
  178. $.extend(DecisionNode.prototype, ForkNode.prototype, {
  179. initialize: function(workflow, model, registry) {
  180. var self = this;
  181. var registry = registry;
  182. var end = null;
  183. },
  184. end: function() {
  185. var self = this;
  186. var end = null;
  187. $.each(self.child_links(), function(index, link) {
  188. if (link.name() == 'related') {
  189. end = self.registry.get(link.child());
  190. }
  191. });
  192. return end;
  193. },
  194. /**
  195. * Append a node to the current decision
  196. * Also appends end node to node.
  197. * NOTE: Cannot append a decision or fork! Use addChild or replaceChild instead!
  198. */
  199. append: function(node) {
  200. var self = this;
  201. if (node.node_type() != 'decision' && node.node_type() != 'fork') {
  202. var end = self.end();
  203. if (end.id() != node.id()) {
  204. var children = end.findChildren();
  205. self.addChild(node);
  206. node.append(end);
  207. // remember children
  208. $.each(children, function(index, child) {
  209. end.addChild(child);
  210. });
  211. }
  212. }
  213. },
  214. /**
  215. * Replace child node with another node
  216. * 1. Remove child if the replacement is end
  217. * 2. Apply Node.replaceChild for all other causes
  218. */
  219. replaceChild: function(child, replacement) {
  220. var self = this;
  221. var ret = true;
  222. var end = self.end();
  223. if (end && end.id() == replacement.id()) {
  224. ret = self.removeChild(child);
  225. } else {
  226. ret = Node.prototype.replaceChild.apply(self, arguments);
  227. }
  228. if (self.links().length < 2) {
  229. self.detach();
  230. end.detach();
  231. self.erase();
  232. end.erase();
  233. }
  234. return ret;
  235. }
  236. });
  237. /**
  238. * Workflow module
  239. */
  240. var WorkflowModule = function($, NodeModelChooser, Node, ForkNode, DecisionNode, IdGeneratorTable) {
  241. function addModelModificationHandlers(workflow, mapping, model, key) {
  242. mapping.subscribe(function(value) {
  243. workflow.is_dirty(true);
  244. model[key] = ko.mapping.toJS(value);
  245. });
  246. }
  247. function updateData(mapping, model) {
  248. // Unstructured data section.
  249. // Assumes ko.mapping was used to create children.
  250. // Assumes one of three structures:
  251. // - members are literals
  252. // - members are arrays of literals
  253. // - members are arrays of objects with literal members
  254. // The point is to keep any parent containers and replace child observables.
  255. // Templates will likely be tied to parent containers... so if we bubble changes
  256. // to the parent container... the UI will reflect that.
  257. $.each(mapping, function(member, value) {
  258. if (member in model) {
  259. if ($.isArray(value()) && $.isArray(model[member])) {
  260. mapping[member].removeAll();
  261. $.each(model[member], function(key, object_or_literal) {
  262. if ($.isPlainObject(object_or_literal)) {
  263. var obj = {};
  264. $.each(object_or_literal, function(key, literal) {
  265. obj[key] = ko.mapping.fromJS(literal);
  266. obj[key].subscribe(function() {
  267. mapping[member].valueHasMutated();
  268. });
  269. });
  270. mapping[member].push(obj);
  271. } else {
  272. var literal = ko.mapping.fromJS(object_or_literal);
  273. mapping[member].push(literal);
  274. literal.subscribe(function() {
  275. mapping[member].valueHasMutated();
  276. });
  277. }
  278. });
  279. } else {
  280. mapping[member](model[member]);
  281. }
  282. }
  283. });
  284. }
  285. var module = function(options) {
  286. var self = this;
  287. // @see http://knockoutjs.com/documentation/plugins-mapping.html
  288. var mapping = ko.mapping.fromJS(options.model, {
  289. ignore: ['initialize', 'toString', 'copy', 'nodes'],
  290. job_properties: {
  291. create: function(options) {
  292. var parent = options.parent;
  293. var subscribe = function(mapping) {
  294. mapping.name.subscribe(function(value) {
  295. parent.job_properties.valueHasMutated();
  296. });
  297. mapping.value.subscribe(function(value) {
  298. parent.job_properties.valueHasMutated();
  299. });
  300. };
  301. return map_params(options, subscribe);
  302. },
  303. update: function(options) {
  304. var parent = options.parent;
  305. var subscribe = function(mapping) {
  306. mapping.name.subscribe(function(value) {
  307. parent.job_properties.valueHasMutated();
  308. });
  309. mapping.value.subscribe(function(value) {
  310. parent.job_properties.valueHasMutated();
  311. });
  312. };
  313. return map_params(options, subscribe);
  314. }
  315. },
  316. parameters: {
  317. // Will receive individual objects to subscribe.
  318. // Containing array is mapped automagically
  319. create: function(options) {
  320. var parent = options.parent;
  321. var subscribe = function(mapping) {
  322. mapping.name.subscribe(function(value) {
  323. parent.parameters.valueHasMutated();
  324. });
  325. mapping.value.subscribe(function(value) {
  326. parent.parameters.valueHasMutated();
  327. });
  328. };
  329. return map_params(options, subscribe);
  330. },
  331. update: function(options) {
  332. var parent = options.parent;
  333. var subscribe = function(mapping) {
  334. mapping.name.subscribe(function(value) {
  335. parent.parameters.valueHasMutated();
  336. });
  337. mapping.value.subscribe(function(value) {
  338. parent.parameters.valueHasMutated();
  339. });
  340. };
  341. return map_params(options, subscribe);
  342. }
  343. },
  344. data: {
  345. create: function(options) {
  346. return map_data(options);
  347. },
  348. update: function(options) {
  349. return map_data(options);
  350. }
  351. }
  352. });
  353. $.extend(self, mapping);
  354. $.each(self['__ko_mapping__'].mappedProperties, function(key, value) {
  355. if (ko.isObservable(self[key])) {
  356. addModelModificationHandlers(self, self[key], options.model, key);
  357. } else {
  358. // Unstructured data object.
  359. $.each(self[key], function(_key, _value) {
  360. // @TODO: Don't assume all children are observable
  361. if (ko.isObservable(self[key][_key])) {
  362. addModelModificationHandlers(self, self[key][_key], options.model[key], _key);
  363. }
  364. });
  365. }
  366. });
  367. self.model = options.model;
  368. self.registry = options.registry;
  369. self.options = options;
  370. self.el = (options.el) ? $(options.el) : $('#workflow');
  371. self.nodes = ko.observableArray([]);
  372. self.kill = null;
  373. self.is_dirty = ko.observable( false );
  374. self.loading = ko.observable( false );
  375. self.read_only = ko.observable( options.read_only || false );
  376. self.new_node = ko.observable();
  377. // Create fields from the generic data field
  378. self.sla = ko.computed(function() {
  379. return self.data.sla();
  380. });
  381. // self.globalProperties = ko.computed(function() {
  382. // return self.data.globalProperties();
  383. // });
  384. // self.globalConfig = ko.computed(function() {
  385. // return self.data.globalConfig();
  386. // });
  387. self.url = ko.computed(function() {
  388. return '/oozie/workflows/' + self.id();
  389. });
  390. // Events
  391. self.el.on('workflow:rebuild', function() {
  392. self.rebuild();
  393. });
  394. self.el.on('workflow:events:load', function() {
  395. self.dragAndDropEvents( options );
  396. });
  397. self.el.on('workflow:droppables:load', function() {
  398. self.droppables();
  399. });
  400. self.el.on('workflow:draggables:load', function() {
  401. self.draggables();
  402. });
  403. self.dragAndDropEvents( options );
  404. self.el.trigger('workflow:events:loaded');
  405. module.prototype.initialize.apply(self, arguments);
  406. return self;
  407. };
  408. $.extend(module.prototype, {
  409. // Normal stuff
  410. initialize: function(options) {
  411. var self = this;
  412. $.extend(self.options, options);
  413. if ('model' in options) {
  414. self.model = options.model;
  415. // Initialize nodes
  416. if (self.model.nodes) {
  417. self.registry.clear();
  418. $.each(self.model.nodes, function(index, node) {
  419. var NodeModel = NodeModelChooser(node.node_type);
  420. var model = new NodeModel(node);
  421. var temp = null;
  422. switch(node.node_type) {
  423. case 'start':
  424. temp = new StartNode(self, model, self.registry);
  425. break;
  426. case 'fork':
  427. temp = new ForkNode(self, model, self.registry);
  428. break;
  429. case 'decision':
  430. temp = new DecisionNode(self, model, self.registry);
  431. break;
  432. case 'kill':
  433. temp = self.kill = new Node(self, model, self.registry);
  434. break;
  435. default:
  436. temp = new Node(self, model, self.registry);
  437. break;
  438. }
  439. self.registry.add(temp.id(), temp);
  440. });
  441. }
  442. // Update data
  443. $.each(self.model, function (key, value) {
  444. if (key in self) {
  445. switch(key) {
  446. case 'job_properties':
  447. case 'parameters':
  448. // These may be serialized JSON data since that is how they are stored
  449. self[key].removeAll();
  450. var arr;
  451. try {
  452. arr = $.parseJSON(value);
  453. }
  454. catch (error){
  455. arr = value;
  456. }
  457. $.each(arr, function(index, obj) {
  458. var mapping = ko.mapping.fromJS(obj);
  459. mapping.name.subscribe(function(value) {
  460. self[key].valueHasMutated();
  461. });
  462. mapping.value.subscribe(function(value) {
  463. self[key].valueHasMutated();
  464. });
  465. self[key].push(mapping);
  466. });
  467. break;
  468. case 'nodes':
  469. break;
  470. case 'data':
  471. var data = {};
  472. try {
  473. data = $.parseJSON(value);
  474. } catch (error){
  475. data = value;
  476. }
  477. alert(JSON.stringify(data));
  478. updateData(self[key], data);
  479. break;
  480. default:
  481. self[key](value);
  482. break;
  483. }
  484. }
  485. });
  486. self.is_dirty( false );
  487. }
  488. if (!self.kill) {
  489. var kill_json = {
  490. "description": "",
  491. "workflow": self.id(),
  492. "child_links": [],
  493. "node_type": "kill",
  494. "message": "Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]",
  495. "name": "kill",
  496. "id": IdGeneratorTable['kill'].nextId()
  497. };
  498. var NodeModel = NodeModelChooser(kill_json.node_type);
  499. var model = new NodeModel(kill_json);
  500. self.kill = new Node(self, model, self.registry);
  501. self.registry.add(self.kill.id(), self.kill);
  502. }
  503. if ('read_only' in options) {
  504. self.read_only(options['read_only']);
  505. }
  506. if (self.errors) {
  507. ko.mapping.fromJS(format_errors_mapping(self.model), self.errors);
  508. } else {
  509. self.errors = ko.mapping.fromJS(format_errors_mapping(self.model));
  510. }
  511. },
  512. toString: function() {
  513. return '';
  514. var s = '[';
  515. $.each(self.registry.nodes, function(key, node) {
  516. s += node.model.toString() + ",\n";
  517. });
  518. return s + ']';
  519. },
  520. // Data manipulation
  521. toJSON: function() {
  522. var self = this;
  523. data = $.extend(true, {}, self.model);
  524. var nodes = [];
  525. $.each(self.registry.nodes, function(key, node) {
  526. // Create object with members from the actual model to address JSON.stringify bug
  527. // JSON.stringify does not pick up members specified in prototype prior to object creation.
  528. var model = {};
  529. for (var key in node.model) { //if (key =='data') {alert(node.model[key])};
  530. model[key] = node.model[key];
  531. }
  532. nodes.push(model);
  533. });
  534. data['nodes'] = nodes;
  535. return JSON.stringify(data);
  536. },
  537. save: function( options ) {
  538. var self = this;
  539. var request = $.extend({
  540. url: self.url() + '/save',
  541. type: 'POST',
  542. data: { workflow: self.toJSON() },
  543. success: $.noop,
  544. error: $.noop
  545. }, options || {});
  546. $.ajax(request);
  547. },
  548. load: function( options ) {
  549. var self = this;
  550. var request = $.extend({
  551. url: self.url(),
  552. dataType: 'json',
  553. type: 'GET',
  554. success: $.noop,
  555. error: $.noop
  556. }, options || {});
  557. $.ajax(request);
  558. },
  559. reload: function(model) {
  560. var self = this;
  561. // Clear all children
  562. $.each(self.registry.nodes, function(index, node) {
  563. node.children.removeAll();
  564. });
  565. self.nodes.removeAll();
  566. self.initialize({model: model});
  567. self.rebuild();
  568. self.el.trigger('workflow:loaded');
  569. },
  570. addParameter: function(data, event) {
  571. var self = this;
  572. var prop = { name: ko.observable(""), value: ko.observable("") };
  573. // force bubble up to containing observable array.
  574. prop.name.subscribe(function(){
  575. self.parameters.valueHasMutated();
  576. });
  577. prop.value.subscribe(function(){
  578. self.parameters.valueHasMutated();
  579. });
  580. self.parameters.push(prop);
  581. },
  582. removeParameter: function(data, event) {
  583. var self = this;
  584. self.parameters.remove(data);
  585. },
  586. addJobProperty: function(data, event) {
  587. var self = this;
  588. var prop = { name: ko.observable(""), value: ko.observable("") };
  589. // force bubble up to containing observable array.
  590. prop.name.subscribe(function(){
  591. self.job_properties.valueHasMutated();
  592. });
  593. prop.value.subscribe(function(){
  594. self.job_properties.valueHasMutated();
  595. });
  596. self.job_properties.push(prop);
  597. },
  598. removeJobProperty: function(data, event) {
  599. var self = this;
  600. self.job_properties.remove(data);
  601. },
  602. // Workflow UI
  603. // Function to build nodes... recursively.
  604. build: function() {
  605. var self = this;
  606. var maximum = 100;
  607. var count = 0;
  608. var methodChooser = function(node, collection, skip_parents_check) {
  609. if (count++ >= maximum) {
  610. console.error('Hit maximum number of node recursion: ' + maximum);
  611. return null;
  612. }
  613. if (!node) {
  614. return node;
  615. }
  616. var parents = node.findParents();
  617. // Found end of decision node or found join!
  618. if (parents.length > 1 && !skip_parents_check) {
  619. return node;
  620. }
  621. switch(node.node_type()) {
  622. case 'start':
  623. case 'end':
  624. case 'kill':
  625. case 'fork':
  626. case 'join':
  627. case 'decision':
  628. case 'decisionend':
  629. return control(node, collection);
  630. default:
  631. return normal(node, collection);
  632. }
  633. };
  634. var normal = function(node, collection) {
  635. collection.push(node);
  636. var retNode = null;
  637. $.each(node.links(), function(index, link) {
  638. var next_node = self.registry.get(link.child());
  639. retNode = methodChooser(next_node, collection, false, true);
  640. });
  641. return retNode;
  642. };
  643. var control = function(node, collection, skip_parents_check) {
  644. switch(node.node_type()) {
  645. case 'start':
  646. case 'end':
  647. case 'kill':
  648. case 'join':
  649. case 'decisionend':
  650. return normal(node, collection, false, true);
  651. case 'fork':
  652. collection.push(node);
  653. // Wait for join.
  654. // Iterate through all children and add them to child collection.
  655. var join = null;
  656. $.each(node.links(), function(index, link) {
  657. var next_node = self.registry.get(link.child());
  658. var collection = ko.observableArray([]);
  659. node.children.push(collection);
  660. join = methodChooser(next_node, collection, false, true);
  661. });
  662. // Add join to collection, then find its single child.
  663. return methodChooser(join, collection, true, true);
  664. case 'decision':
  665. collection.push(node);
  666. // Waits for end, then runs through children of end node
  667. var end = null;
  668. $.each(node.links(), function(index, link) {
  669. var next_node = self.registry.get(link.child());
  670. var collection = ko.observableArray([]);
  671. node.children.push(collection);
  672. end = methodChooser(next_node, collection, true, true);
  673. });
  674. // Add end
  675. return methodChooser(node.end(), collection, true, true);
  676. default:
  677. // Should never get here.
  678. return node;
  679. }
  680. };
  681. methodChooser(self.registry.get(self.start()), self.nodes, false, true);
  682. $(".tooltip").remove();
  683. $("[relz=tooltip]").tooltip({placement: "left", delay: 0});
  684. $("[relz=tooltip]").hover(function () {
  685. $(".tooltip").css("left", parseInt($(".tooltip").css("left")) - 10 + "px");
  686. }, function () {
  687. $(".tooltip").remove();
  688. });
  689. },
  690. rebuild: function() {
  691. var self = this;
  692. // Clear all children
  693. $.each(self.registry.nodes, function(index, node) {
  694. node.children.removeAll();
  695. });
  696. self.nodes.removeAll();
  697. // Rebuild
  698. self.build();
  699. self.draggables();
  700. self.droppables();
  701. self.el.trigger('workflow:rebuilt');
  702. },
  703. draggables: function() {
  704. var self = this;
  705. self.el.find('.node-action').each(function(index, el) {
  706. if (!$(el).hasClass('ui-draggable')) {
  707. $(el).find('.row-fluid').eq(0).css('cursor', 'move');
  708. $(el).draggable({
  709. containment: [ self.el.offset().left - 10, self.el.offset().top - 10,
  710. self.el.offset().left + self.el.outerWidth(), self.el.offset().top + self.el.outerHeight() ],
  711. refreshPositions: true,
  712. revert: true,
  713. zIndex: 1000,
  714. opacity: 0.45,
  715. revertDuration: 0,
  716. cancel: '.node-action-bar'
  717. });
  718. }
  719. });
  720. },
  721. droppables: function() {
  722. var self = this;
  723. self.el.find('.node-link').each(function(index, el) {
  724. $(el).droppable({
  725. 'hoverClass': 'node-link-hover',
  726. 'greedy': true,
  727. 'accept': '.node-action',
  728. 'tolerance': 'pointer'
  729. });
  730. });
  731. self.el.find('.node-decision-end').each(function(index, el) {
  732. $(el).droppable({
  733. 'hoverClass': 'node-link-hover',
  734. 'greedy': true,
  735. 'accept': '.node-action',
  736. 'tolerance': 'pointer'
  737. });
  738. });
  739. self.el.find('.node-fork .action').each(function(index, el) {
  740. $(el).droppable({
  741. 'hoverClass': 'node-fork-hover',
  742. 'greedy': true,
  743. 'accept': '.node-action',
  744. 'tolerance': 'pointer'
  745. });
  746. });
  747. self.el.find('.node-decision .action').each(function(index, el) {
  748. $(el).droppable({
  749. 'hoverClass': 'node-fork-hover',
  750. 'greedy': true,
  751. 'accept': '.node-action',
  752. 'tolerance': 'pointer'
  753. });
  754. });
  755. self.el.find('.node-action .action').each(function(index, el) {
  756. $(el).droppable({
  757. 'hoverClass': 'node-action-hover',
  758. 'greedy': true,
  759. 'accept': '.node-action',
  760. 'tolerance': 'pointer'
  761. });
  762. });
  763. },
  764. dragAndDropEvents: function( options ) {
  765. var self = this;
  766. var read_only_error_handler = options.read_only_error_handler;
  767. // Build event delegations.
  768. // Drop on node link
  769. self.el.on('drop', '.node-link', function(e, ui) {
  770. if (self.read_only()) {
  771. read_only_error_handler();
  772. return false;
  773. }
  774. // draggable should be a node.
  775. // droppable should be a link.
  776. var draggable = ko.contextFor(ui.draggable[0]).$data;
  777. var droppable = ko.contextFor(this).$data;
  778. // If newParent is fork, prepend to child instead.
  779. // This will make it so that we can drop and drop to the top of a node list within a fork.
  780. var newParent = self.registry.get(droppable.parent());
  781. if (newParent.id() != draggable.id() && !newParent.isChild(draggable)) {
  782. switch(newParent.node_type()) {
  783. case 'fork':
  784. case 'decision':
  785. // Children that are forks or decisions may be removed when we detach.
  786. // Remember children in this case to find correct node.
  787. var child = self.registry.get(droppable.child());
  788. var children_of_child = [];
  789. if (child.node_type() == 'fork' || child.node_type() == 'decision') {
  790. children_of_child = child.findChildren();
  791. }
  792. draggable.detach();
  793. // Make sure fork and decision still exist
  794. // Otherwise find child that replaced it
  795. var child_to_replace = child;
  796. if (child.node_type() == 'fork' || child.node_type() == 'decision') {
  797. if (!self.registry.get(child.id())) {
  798. // Guaranteed one because the fork is being removed right now.
  799. child_to_replace = $.grep(children_of_child, function(child_of_child, index) {
  800. return child_of_child.findParents().length > 0;
  801. })[0];
  802. }
  803. }
  804. newParent.replaceChild(child_to_replace, draggable);
  805. draggable.addChild(child_to_replace);
  806. break;
  807. case 'join':
  808. case 'decisionend':
  809. // Join and decisionend may disappear when we detach...
  810. // Remember its children and append to child.
  811. var parents = newParent.findParents();
  812. draggable.detach();
  813. if (newParent.findParents().length < 2) {
  814. $.each(parents, function(index, parent) {
  815. parent.append(draggable);
  816. });
  817. } else {
  818. newParent.append(draggable);
  819. }
  820. break;
  821. default:
  822. draggable.detach();
  823. newParent.append(draggable);
  824. break;
  825. }
  826. workflow.is_dirty( true );
  827. self.rebuild();
  828. }
  829. // Prevent bubbling events
  830. return false;
  831. });
  832. // Drop on fork
  833. self.el.on('drop', '.node-fork', function(e, ui) {
  834. if (self.read_only()) {
  835. read_only_error_handler();
  836. return false;
  837. }
  838. // draggable should be a node.
  839. // droppable should be a fork.
  840. var draggable = ko.contextFor(ui.draggable[0]).$data;
  841. var droppable = ko.contextFor(this).$data;
  842. if (!droppable.isChild(draggable) && droppable.id() != draggable.id()) {
  843. draggable.detach();
  844. droppable.append(draggable);
  845. self.rebuild();
  846. }
  847. // Prevent bubbling events
  848. return false;
  849. });
  850. // Drop on decision
  851. self.el.on('drop', '.node-decision', function(e, ui) {
  852. if (self.read_only()) {
  853. read_only_error_handler();
  854. return false;
  855. }
  856. // draggable should be a node.
  857. // droppable should be a fork.
  858. var draggable = ko.contextFor(ui.draggable[0]).$data;
  859. var droppable = ko.contextFor(this).$data;
  860. if (!droppable.isChild(draggable) && droppable.id() != draggable.id()) {
  861. draggable.detach();
  862. droppable.append(draggable);
  863. self.rebuild();
  864. }
  865. // Prevent bubbling events
  866. return false;
  867. });
  868. // Drop on action
  869. self.el.on('drop', '.node-action', function(e, ui) {
  870. if (self.read_only()) {
  871. read_only_error_handler();
  872. return false;
  873. }
  874. // draggable should be a node.
  875. // droppable should be a node.
  876. var draggable = ko.contextFor(ui.draggable[0]).$data;
  877. var droppable = ko.contextFor(this).$data;
  878. // Create a fork and join programatically.
  879. var newParents = droppable.findParents();
  880. // skip forking beneathe a decision node
  881. if (droppable.id() != draggable.id() && newParents.length == 1 && draggable.findParents().length <= 1) {
  882. var ForkModel = NodeModelChooser('fork');
  883. var JoinModel = NodeModelChooser('join');
  884. var fork = new ForkModel({
  885. id: IdGeneratorTable['fork'].nextId(),
  886. description: "",
  887. workflow: self.id,
  888. node_type: "fork",
  889. child_links: []
  890. });
  891. var forkNode = new ForkNode(self, fork, self.registry);
  892. var join = new JoinModel({
  893. id: IdGeneratorTable['join'].nextId(),
  894. description: "",
  895. workflow: self.id,
  896. node_type: "join",
  897. child_links: []
  898. });
  899. var joinNode = new Node(self, join, self.registry);
  900. self.registry.add(forkNode.id(), forkNode);
  901. self.registry.add(joinNode.id(), joinNode);
  902. forkNode.addChild(joinNode);
  903. // Handles fork creation.
  904. $.each(newParents, function(index, parent) {
  905. parent.replaceChild(droppable, forkNode);
  906. });
  907. draggable.detach();
  908. forkNode.append(draggable);
  909. forkNode.append(droppable);
  910. self.rebuild();
  911. }
  912. // Prevent bubbling events.
  913. return false;
  914. });
  915. }
  916. });
  917. return module;
  918. };
  919. var Workflow = WorkflowModule($, nodeModelChooser, Node, ForkNode, DecisionNode, IdGeneratorTable);
  920. // Manage Kill Module
  921. function ManageKillModule($, workflow, NodeModelChooser, Node, NodeModel) {
  922. var email_action = null;
  923. var parents = workflow.kill.findParents();
  924. var email_enabled = ko.observable();
  925. if (parents.length > 0) {
  926. email_action = parents[0];
  927. email_enabled(true);
  928. } else {
  929. var email_json = {
  930. "description": "",
  931. "workflow": workflow.id(),
  932. "child_links": [],
  933. "node_type": "email",
  934. "message": "Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]",
  935. "name": 'killemail',
  936. "id": IdGeneratorTable['email'].nextId()
  937. };
  938. var NodeModel = NodeModelChooser(email_json.node_type);
  939. var model = new NodeModel(email_json);
  940. email_action = new Node(workflow, model, workflow.registry);
  941. email_enabled(false);
  942. }
  943. var replace_email = function(email_action) {
  944. email_action.removeAllChildren();
  945. email_action.removeErrorChildren();
  946. $.each(workflow.registry.nodes, function(index, node) {
  947. if (node.getErrorChild() && node.id() != email_action.id()) {
  948. node.putErrorChild(workflow.kill);
  949. }
  950. });
  951. };
  952. var replace_kill = function(email_action) {
  953. if (email_action.findChildren().length == 0) {
  954. email_action.addChild(workflow.kill, 'ok');
  955. }
  956. if (!email_action.getErrorChild()) {
  957. email_action.putErrorChild(workflow.kill);
  958. }
  959. $.each(workflow.registry.nodes, function(index, node) {
  960. if (node.getErrorChild() && node.id() != email_action.id()) {
  961. node.putErrorChild(email_action);
  962. }
  963. });
  964. };
  965. // Add/Remove kill email action node from registry so that it is not sent to server.
  966. email_action.to.subscribe(function(value) {
  967. if (value && !email_enabled()) {
  968. workflow.registry.add(email_action.id(), email_action);
  969. replace_kill(email_action);
  970. email_enabled(true);
  971. } else if (!value && email_enabled()) {
  972. replace_email(email_action);
  973. email_enabled(false);
  974. workflow.registry.remove(email_action.id());
  975. email_action.id(IdGeneratorTable['email'].nextId());
  976. }
  977. return value;
  978. });
  979. // View model
  980. return {
  981. 'enabled': email_enabled,
  982. 'isValid': function() {
  983. return email_action.validate();
  984. },
  985. 'context': ko.observable({
  986. 'node': ko.observable(email_action),
  987. 'read_only': ko.observable(workflow.read_only())
  988. })
  989. };
  990. };