workflow.js 33 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 addHooks(workflow, mapping, model, key) {
  242. mapping.subscribe(function(value) {
  243. workflow.is_dirty(true);
  244. });
  245. }
  246. function updateData(mapping, model) {
  247. // Unstructured data section.
  248. // Assumes ko.mapping was used to create children.
  249. // Assumes one of three structures:
  250. // - members are literals
  251. // - members are arrays of literals
  252. // - members are arrays of objects with literal members
  253. // The point is to keep any parent containers and replace child observables.
  254. // Templates will likely be tied to parent containers... so if we bubble changes
  255. // to the parent container... the UI will reflect that.
  256. $.each(mapping, function(member, value) {
  257. if (member in model) {
  258. if ($.isArray(value()) && $.isArray(model[member])) {
  259. mapping[member].removeAll();
  260. $.each(model[member], function(key, object_or_literal) {
  261. if ($.isPlainObject(object_or_literal)) {
  262. var obj = {};
  263. $.each(object_or_literal, function(key, literal) {
  264. obj[key] = ko.mapping.fromJS(literal);
  265. obj[key].subscribe(function() {
  266. mapping[member].valueHasMutated();
  267. });
  268. });
  269. mapping[member].push(obj);
  270. } else {
  271. var literal = ko.mapping.fromJS(object_or_literal);
  272. mapping[member].push(literal);
  273. literal.subscribe(function() {
  274. mapping[member].valueHasMutated();
  275. });
  276. }
  277. });
  278. } else {
  279. mapping[member](model[member]);
  280. }
  281. }
  282. });
  283. }
  284. var module = function(options) {
  285. var self = this;
  286. // @see http://knockoutjs.com/documentation/plugins-mapping.html
  287. var mapping = ko.mapping.fromJS(options.model, {
  288. ignore: ['initialize', 'toString', 'copy', 'nodes'],
  289. job_properties: {
  290. create: function(options) {
  291. var parent = options.parent;
  292. var subscribe = function(mapping) {
  293. mapping.name.subscribe(function(value) {
  294. parent.job_properties.valueHasMutated();
  295. });
  296. mapping.value.subscribe(function(value) {
  297. parent.job_properties.valueHasMutated();
  298. });
  299. };
  300. return map_params(options, subscribe);
  301. },
  302. update: function(options) {
  303. var parent = options.parent;
  304. var subscribe = function(mapping) {
  305. mapping.name.subscribe(function(value) {
  306. parent.job_properties.valueHasMutated();
  307. });
  308. mapping.value.subscribe(function(value) {
  309. parent.job_properties.valueHasMutated();
  310. });
  311. };
  312. return map_params(options, subscribe);
  313. }
  314. },
  315. parameters: {
  316. // Will receive individual objects to subscribe.
  317. // Containing array is mapped automagically
  318. create: function(options) {
  319. var parent = options.parent;
  320. var subscribe = function(mapping) {
  321. mapping.name.subscribe(function(value) {
  322. parent.parameters.valueHasMutated();
  323. });
  324. mapping.value.subscribe(function(value) {
  325. parent.parameters.valueHasMutated();
  326. });
  327. };
  328. return map_params(options, subscribe);
  329. },
  330. update: function(options) {
  331. var parent = options.parent;
  332. var subscribe = function(mapping) {
  333. mapping.name.subscribe(function(value) {
  334. parent.parameters.valueHasMutated();
  335. });
  336. mapping.value.subscribe(function(value) {
  337. parent.parameters.valueHasMutated();
  338. });
  339. };
  340. return map_params(options, subscribe);
  341. }
  342. },
  343. data: {
  344. create: function(options) {
  345. return map_data(options);
  346. },
  347. update: function(options) {
  348. return map_data(options);
  349. }
  350. }
  351. });
  352. $.extend(self, mapping);
  353. $.each(self['__ko_mapping__'].mappedProperties, function(key, value) {
  354. if (ko.isObservable(self[key])) {
  355. addHooks(self, self[key], options.model, key);
  356. } else {
  357. // Unstructured data object.
  358. $.each(self[key], function(_key, _value) {
  359. // @TODO: Don't assume all children are observable
  360. if (ko.isObservable(self[key][_key])) {
  361. addHooks(self, self[key][_key], options.model[key], _key);
  362. }
  363. });
  364. }
  365. });
  366. self.model = options.model;
  367. self.registry = options.registry;
  368. self.options = options;
  369. self.el = (options.el) ? $(options.el) : $('#workflow');
  370. self.nodes = ko.observableArray([]);
  371. self.kill = null;
  372. self.is_dirty = ko.observable(false);
  373. self.loading = ko.observable(false);
  374. self.read_only = ko.observable(options.read_only || false);
  375. self.new_node = ko.observable();
  376. // Create fields from the generic data field
  377. self.sla = ko.computed(function() {
  378. return self.data.sla();
  379. });
  380. self.url = ko.computed(function() {
  381. return '/oozie/workflows/' + self.id();
  382. });
  383. // Events
  384. self.el.on('workflow:rebuild', function() {
  385. self.rebuild();
  386. });
  387. self.el.on('workflow:events:load', function() {
  388. self.dragAndDropEvents( options );
  389. });
  390. self.el.on('workflow:droppables:load', function() {
  391. self.droppables();
  392. });
  393. self.el.on('workflow:draggables:load', function() {
  394. self.draggables();
  395. });
  396. self.dragAndDropEvents( options );
  397. self.el.trigger('workflow:events:loaded');
  398. module.prototype.initialize.apply(self, arguments);
  399. return self;
  400. };
  401. $.extend(module.prototype, {
  402. // Normal stuff
  403. initialize: function(options) {
  404. var self = this;
  405. $.extend(self.options, options);
  406. if ('model' in options) {
  407. self.model = options.model;
  408. // Initialize nodes
  409. if (self.model.nodes) {
  410. self.registry.clear();
  411. $.each(self.model.nodes, function(index, node) {
  412. var NodeModel = NodeModelChooser(node.node_type);
  413. var model = new NodeModel(node);
  414. var temp = null;
  415. switch(node.node_type) {
  416. case 'start':
  417. temp = new StartNode(self, model, self.registry);
  418. break;
  419. case 'fork':
  420. temp = new ForkNode(self, model, self.registry);
  421. break;
  422. case 'decision':
  423. temp = new DecisionNode(self, model, self.registry);
  424. break;
  425. case 'kill':
  426. temp = self.kill = new Node(self, model, self.registry);
  427. break;
  428. default:
  429. temp = new Node(self, model, self.registry);
  430. break;
  431. }
  432. self.registry.add(temp.id(), temp);
  433. });
  434. }
  435. // Update data
  436. $.each(self.model, function (key, value) {
  437. if (key in self) {
  438. switch(key) {
  439. case 'job_properties':
  440. case 'parameters':
  441. // These may be serialized JSON data since that is how they are stored
  442. self[key].removeAll();
  443. var arr;
  444. try {
  445. arr = $.parseJSON(value);
  446. }
  447. catch (error){
  448. arr = value;
  449. }
  450. $.each(arr, function(index, obj) {
  451. var mapping = ko.mapping.fromJS(obj);
  452. mapping.name.subscribe(function(value) {
  453. self[key].valueHasMutated();
  454. });
  455. mapping.value.subscribe(function(value) {
  456. self[key].valueHasMutated();
  457. });
  458. self[key].push(mapping);
  459. });
  460. break;
  461. case 'nodes':
  462. break;
  463. case 'data':
  464. var data = {};
  465. try {
  466. data = $.parseJSON(value);
  467. } catch (error){
  468. data = value;
  469. }
  470. updateData(self[key], data);
  471. break;
  472. default:
  473. self[key](value);
  474. break;
  475. }
  476. }
  477. });
  478. self.is_dirty( false );
  479. }
  480. if (!self.kill) {
  481. var kill_json = {
  482. "description": "",
  483. "workflow": self.id(),
  484. "child_links": [],
  485. "node_type": "kill",
  486. "message": "Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]",
  487. "name": "kill",
  488. "id": IdGeneratorTable['kill'].nextId()
  489. };
  490. var NodeModel = NodeModelChooser(kill_json.node_type);
  491. var model = new NodeModel(kill_json);
  492. self.kill = new Node(self, model, self.registry);
  493. self.registry.add(self.kill.id(), self.kill);
  494. }
  495. if ('read_only' in options) {
  496. self.read_only(options['read_only']);
  497. }
  498. if (self.errors) {
  499. ko.mapping.fromJS(format_errors_mapping(self.model), self.errors);
  500. } else {
  501. self.errors = ko.mapping.fromJS(format_errors_mapping(self.model));
  502. }
  503. },
  504. toString: function() {
  505. return '';
  506. var s = '[';
  507. $.each(self.registry.nodes, function(key, node) {
  508. s += node.model.toString() + ",\n";
  509. });
  510. return s + ']';
  511. },
  512. // Data manipulation
  513. toJSON: function() {
  514. var self = this;
  515. data = $.extend(true, {}, ko.mapping.toJS(self));
  516. data['nodes'] = [];
  517. $.each(self.registry.nodes, function(key, node) {
  518. // Create object with members from the actual model to address JSON.stringify bug
  519. // JSON.stringify does not pick up members specified in prototype prior to object creation.
  520. data['nodes'].push(node.toJS());
  521. });
  522. return JSON.stringify(data);
  523. },
  524. save: function( options ) {
  525. var self = this;
  526. var request = $.extend({
  527. url: self.url() + '/save',
  528. type: 'POST',
  529. data: { workflow: self.toJSON() },
  530. success: $.noop,
  531. error: $.noop
  532. }, options || {});
  533. $.ajax(request);
  534. },
  535. load: function( options ) {
  536. var self = this;
  537. var request = $.extend({
  538. url: self.url(),
  539. dataType: 'json',
  540. type: 'GET',
  541. success: $.noop,
  542. error: $.noop
  543. }, options || {});
  544. $.ajax(request);
  545. },
  546. reload: function(model) {
  547. var self = this;
  548. // Clear all children
  549. $.each(self.registry.nodes, function(index, node) {
  550. node.children.removeAll();
  551. });
  552. self.nodes.removeAll();
  553. self.initialize({model: model});
  554. self.rebuild();
  555. self.el.trigger('workflow:loaded');
  556. },
  557. addParameter: function(data, event) {
  558. var self = this;
  559. var prop = { name: ko.observable(""), value: ko.observable("") };
  560. // force bubble up to containing observable array.
  561. prop.name.subscribe(function(){
  562. self.parameters.valueHasMutated();
  563. });
  564. prop.value.subscribe(function(){
  565. self.parameters.valueHasMutated();
  566. });
  567. self.parameters.push(prop);
  568. },
  569. removeParameter: function(data, event) {
  570. var self = this;
  571. self.parameters.remove(data);
  572. },
  573. addJobProperty: function(data, event) {
  574. var self = this;
  575. var prop = { name: ko.observable(""), value: ko.observable("") };
  576. // force bubble up to containing observable array.
  577. prop.name.subscribe(function(){
  578. self.job_properties.valueHasMutated();
  579. });
  580. prop.value.subscribe(function(){
  581. self.job_properties.valueHasMutated();
  582. });
  583. self.job_properties.push(prop);
  584. },
  585. removeJobProperty: function(data, event) {
  586. var self = this;
  587. self.job_properties.remove(data);
  588. },
  589. // Workflow UI
  590. // Function to build nodes... recursively.
  591. build: function() {
  592. var self = this;
  593. var maximum = 100;
  594. var count = 0;
  595. var methodChooser = function(node, collection, skip_parents_check) {
  596. if (count++ >= maximum) {
  597. console.error('Hit maximum number of node recursion: ' + maximum);
  598. return null;
  599. }
  600. if (!node) {
  601. return node;
  602. }
  603. var parents = node.findParents();
  604. // Found end of decision node or found join!
  605. if (parents.length > 1 && !skip_parents_check) {
  606. return node;
  607. }
  608. switch(node.node_type()) {
  609. case 'start':
  610. case 'end':
  611. case 'kill':
  612. case 'fork':
  613. case 'join':
  614. case 'decision':
  615. case 'decisionend':
  616. return control(node, collection);
  617. default:
  618. return normal(node, collection);
  619. }
  620. };
  621. var normal = function(node, collection) {
  622. collection.push(node);
  623. var retNode = null;
  624. $.each(node.links(), function(index, link) {
  625. var next_node = self.registry.get(link.child());
  626. retNode = methodChooser(next_node, collection, false, true);
  627. });
  628. return retNode;
  629. };
  630. var control = function(node, collection, skip_parents_check) {
  631. switch(node.node_type()) {
  632. case 'start':
  633. case 'end':
  634. case 'kill':
  635. case 'join':
  636. case 'decisionend':
  637. return normal(node, collection, false, true);
  638. case 'fork':
  639. collection.push(node);
  640. // Wait for join.
  641. // Iterate through all children and add them to child collection.
  642. var join = null;
  643. $.each(node.links(), function(index, link) {
  644. var next_node = self.registry.get(link.child());
  645. var collection = ko.observableArray([]);
  646. node.children.push(collection);
  647. join = methodChooser(next_node, collection, false, true);
  648. });
  649. // Add join to collection, then find its single child.
  650. return methodChooser(join, collection, true, true);
  651. case 'decision':
  652. collection.push(node);
  653. // Waits for end, then runs through children of end node
  654. var end = null;
  655. $.each(node.links(), function(index, link) {
  656. var next_node = self.registry.get(link.child());
  657. var collection = ko.observableArray([]);
  658. node.children.push(collection);
  659. end = methodChooser(next_node, collection, true, true);
  660. });
  661. // Add end
  662. return methodChooser(node.end(), collection, true, true);
  663. default:
  664. // Should never get here.
  665. return node;
  666. }
  667. };
  668. methodChooser(self.registry.get(self.start()), self.nodes, false, true);
  669. $(".tooltip").remove();
  670. $("[relz=tooltip]").tooltip({placement: "left", delay: 0});
  671. $("[relz=tooltip]").hover(function () {
  672. $(".tooltip").css("left", parseInt($(".tooltip").css("left")) - 10 + "px");
  673. }, function () {
  674. $(".tooltip").remove();
  675. });
  676. },
  677. rebuild: function() {
  678. var self = this;
  679. // Clear all children
  680. $.each(self.registry.nodes, function(index, node) {
  681. node.children.removeAll();
  682. });
  683. self.nodes.removeAll();
  684. // Rebuild
  685. self.build();
  686. self.draggables();
  687. self.droppables();
  688. self.el.trigger('workflow:rebuilt');
  689. },
  690. draggables: function() {
  691. var self = this;
  692. self.el.find('.node-action').each(function(index, el) {
  693. if (!$(el).hasClass('ui-draggable')) {
  694. $(el).find('.row-fluid').eq(0).css('cursor', 'move');
  695. $(el).draggable({
  696. containment: [ self.el.offset().left - 10, self.el.offset().top - 10,
  697. self.el.offset().left + self.el.outerWidth(), self.el.offset().top + self.el.outerHeight() ],
  698. refreshPositions: true,
  699. revert: true,
  700. zIndex: 1000,
  701. opacity: 0.45,
  702. revertDuration: 0,
  703. cancel: '.node-action-bar'
  704. });
  705. }
  706. });
  707. },
  708. droppables: function() {
  709. var self = this;
  710. self.el.find('.node-link').each(function(index, el) {
  711. $(el).droppable({
  712. 'hoverClass': 'node-link-hover',
  713. 'greedy': true,
  714. 'accept': '.node-action',
  715. 'tolerance': 'pointer'
  716. });
  717. });
  718. self.el.find('.node-decision-end').each(function(index, el) {
  719. $(el).droppable({
  720. 'hoverClass': 'node-link-hover',
  721. 'greedy': true,
  722. 'accept': '.node-action',
  723. 'tolerance': 'pointer'
  724. });
  725. });
  726. self.el.find('.node-fork .action').each(function(index, el) {
  727. $(el).droppable({
  728. 'hoverClass': 'node-fork-hover',
  729. 'greedy': true,
  730. 'accept': '.node-action',
  731. 'tolerance': 'pointer'
  732. });
  733. });
  734. self.el.find('.node-decision .action').each(function(index, el) {
  735. $(el).droppable({
  736. 'hoverClass': 'node-fork-hover',
  737. 'greedy': true,
  738. 'accept': '.node-action',
  739. 'tolerance': 'pointer'
  740. });
  741. });
  742. self.el.find('.node-action .action').each(function(index, el) {
  743. $(el).droppable({
  744. 'hoverClass': 'node-action-hover',
  745. 'greedy': true,
  746. 'accept': '.node-action',
  747. 'tolerance': 'pointer'
  748. });
  749. });
  750. },
  751. dragAndDropEvents: function( options ) {
  752. var self = this;
  753. var read_only_error_handler = options.read_only_error_handler;
  754. // Build event delegations.
  755. // Drop on node link
  756. self.el.on('drop', '.node-link', function(e, ui) {
  757. if (self.read_only()) {
  758. read_only_error_handler();
  759. return false;
  760. }
  761. // draggable should be a node.
  762. // droppable should be a link.
  763. var draggable = ko.contextFor(ui.draggable[0]).$data;
  764. var droppable = ko.contextFor(this).$data;
  765. // If newParent is fork, prepend to child instead.
  766. // This will make it so that we can drop and drop to the top of a node list within a fork.
  767. var newParent = self.registry.get(droppable.parent());
  768. if (newParent.id() != draggable.id() && !newParent.isChild(draggable)) {
  769. switch(newParent.node_type()) {
  770. case 'fork':
  771. case 'decision':
  772. // Children that are forks or decisions may be removed when we detach.
  773. // Remember children in this case to find correct node.
  774. var child = self.registry.get(droppable.child());
  775. var children_of_child = [];
  776. if (child.node_type() == 'fork' || child.node_type() == 'decision') {
  777. children_of_child = child.findChildren();
  778. }
  779. draggable.detach();
  780. // Make sure fork and decision still exist
  781. // Otherwise find child that replaced it
  782. var child_to_replace = child;
  783. if (child.node_type() == 'fork' || child.node_type() == 'decision') {
  784. if (!self.registry.get(child.id())) {
  785. // Guaranteed one because the fork is being removed right now.
  786. child_to_replace = $.grep(children_of_child, function(child_of_child, index) {
  787. return child_of_child.findParents().length > 0;
  788. })[0];
  789. }
  790. }
  791. newParent.replaceChild(child_to_replace, draggable);
  792. draggable.addChild(child_to_replace);
  793. break;
  794. case 'join':
  795. case 'decisionend':
  796. // Join and decisionend may disappear when we detach...
  797. // Remember its children and append to child.
  798. var parents = newParent.findParents();
  799. draggable.detach();
  800. if (newParent.findParents().length < 2) {
  801. $.each(parents, function(index, parent) {
  802. parent.append(draggable);
  803. });
  804. } else {
  805. newParent.append(draggable);
  806. }
  807. break;
  808. default:
  809. draggable.detach();
  810. newParent.append(draggable);
  811. break;
  812. }
  813. workflow.is_dirty( true );
  814. self.rebuild();
  815. }
  816. // Prevent bubbling events
  817. return false;
  818. });
  819. // Drop on fork
  820. self.el.on('drop', '.node-fork', function(e, ui) {
  821. if (self.read_only()) {
  822. read_only_error_handler();
  823. return false;
  824. }
  825. // draggable should be a node.
  826. // droppable should be a fork.
  827. var draggable = ko.contextFor(ui.draggable[0]).$data;
  828. var droppable = ko.contextFor(this).$data;
  829. if (!droppable.isChild(draggable) && droppable.id() != draggable.id()) {
  830. draggable.detach();
  831. droppable.append(draggable);
  832. self.rebuild();
  833. }
  834. // Prevent bubbling events
  835. return false;
  836. });
  837. // Drop on decision
  838. self.el.on('drop', '.node-decision', function(e, ui) {
  839. if (self.read_only()) {
  840. read_only_error_handler();
  841. return false;
  842. }
  843. // draggable should be a node.
  844. // droppable should be a fork.
  845. var draggable = ko.contextFor(ui.draggable[0]).$data;
  846. var droppable = ko.contextFor(this).$data;
  847. if (!droppable.isChild(draggable) && droppable.id() != draggable.id()) {
  848. draggable.detach();
  849. droppable.append(draggable);
  850. self.rebuild();
  851. }
  852. // Prevent bubbling events
  853. return false;
  854. });
  855. // Drop on action
  856. self.el.on('drop', '.node-action', function(e, ui) {
  857. if (self.read_only()) {
  858. read_only_error_handler();
  859. return false;
  860. }
  861. // draggable should be a node.
  862. // droppable should be a node.
  863. var draggable = ko.contextFor(ui.draggable[0]).$data;
  864. var droppable = ko.contextFor(this).$data;
  865. // Create a fork and join programatically.
  866. var newParents = droppable.findParents();
  867. // skip forking beneathe a decision node
  868. if (droppable.id() != draggable.id() && newParents.length == 1 && draggable.findParents().length <= 1) {
  869. var ForkModel = NodeModelChooser('fork');
  870. var JoinModel = NodeModelChooser('join');
  871. var fork = new ForkModel({
  872. id: IdGeneratorTable['fork'].nextId(),
  873. description: "",
  874. workflow: self.id,
  875. node_type: "fork",
  876. child_links: []
  877. });
  878. var forkNode = new ForkNode(self, fork, self.registry);
  879. var join = new JoinModel({
  880. id: IdGeneratorTable['join'].nextId(),
  881. description: "",
  882. workflow: self.id,
  883. node_type: "join",
  884. child_links: []
  885. });
  886. var joinNode = new Node(self, join, self.registry);
  887. self.registry.add(forkNode.id(), forkNode);
  888. self.registry.add(joinNode.id(), joinNode);
  889. forkNode.addChild(joinNode);
  890. // Handles fork creation.
  891. $.each(newParents, function(index, parent) {
  892. parent.replaceChild(droppable, forkNode);
  893. });
  894. draggable.detach();
  895. forkNode.append(draggable);
  896. forkNode.append(droppable);
  897. self.rebuild();
  898. }
  899. // Prevent bubbling events.
  900. return false;
  901. });
  902. }
  903. });
  904. return module;
  905. };
  906. var Workflow = WorkflowModule($, nodeModelChooser, Node, ForkNode, DecisionNode, IdGeneratorTable);
  907. // Manage Kill Module
  908. function ManageKillModule($, workflow, NodeModelChooser, Node, NodeModel) {
  909. var email_action = null;
  910. var parents = workflow.kill.findParents();
  911. var email_enabled = ko.observable();
  912. if (parents.length > 0) {
  913. email_action = parents[0];
  914. email_enabled(true);
  915. } else {
  916. var email_json = {
  917. "description": "",
  918. "workflow": workflow.id(),
  919. "child_links": [],
  920. "node_type": "email",
  921. "message": "Action failed, error message[${wf:errorMessage(wf:lastErrorNode())}]",
  922. "name": 'killemail',
  923. "id": IdGeneratorTable['email'].nextId()
  924. };
  925. var NodeModel = NodeModelChooser(email_json.node_type);
  926. var model = new NodeModel(email_json);
  927. email_action = new Node(workflow, model, workflow.registry);
  928. email_enabled(false);
  929. }
  930. var replace_email = function(email_action) {
  931. email_action.removeAllChildren();
  932. email_action.removeErrorChildren();
  933. $.each(workflow.registry.nodes, function(index, node) {
  934. if (node.getErrorChild() && node.id() != email_action.id()) {
  935. node.putErrorChild(workflow.kill);
  936. }
  937. });
  938. };
  939. var replace_kill = function(email_action) {
  940. if (email_action.findChildren().length == 0) {
  941. email_action.addChild(workflow.kill, 'ok');
  942. }
  943. if (!email_action.getErrorChild()) {
  944. email_action.putErrorChild(workflow.kill);
  945. }
  946. $.each(workflow.registry.nodes, function(index, node) {
  947. if (node.getErrorChild() && node.id() != email_action.id()) {
  948. node.putErrorChild(email_action);
  949. }
  950. });
  951. };
  952. // Add/Remove kill email action node from registry so that it is not sent to server.
  953. email_action.to.subscribe(function(value) {
  954. if (value && !email_enabled()) {
  955. workflow.registry.add(email_action.id(), email_action);
  956. replace_kill(email_action);
  957. email_enabled(true);
  958. } else if (!value && email_enabled()) {
  959. replace_email(email_action);
  960. email_enabled(false);
  961. workflow.registry.remove(email_action.id());
  962. email_action.id(IdGeneratorTable['email'].nextId());
  963. }
  964. return value;
  965. });
  966. // View model
  967. return {
  968. 'enabled': email_enabled,
  969. 'isValid': function() {
  970. return email_action.validate();
  971. },
  972. 'context': ko.observable({
  973. 'node': ko.observable(email_action),
  974. 'read_only': ko.observable(workflow.read_only())
  975. })
  976. };
  977. };