Source code

001/*
002 * (C) Copyright 2012 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *    Mariana Cedica
018 *
019 * $Id$
020 */
021package org.nuxeo.ecm.platform.routing.web;
022
023import static org.jboss.seam.ScopeType.CONVERSATION;
024
025import java.io.Serializable;
026import java.text.ParseException;
027import java.text.SimpleDateFormat;
028import java.util.ArrayList;
029import java.util.Arrays;
030import java.util.Collections;
031import java.util.Date;
032import java.util.HashMap;
033import java.util.HashSet;
034import java.util.LinkedHashMap;
035import java.util.List;
036import java.util.Map;
037import java.util.Set;
038
039import javax.faces.application.FacesMessage;
040import javax.faces.component.EditableValueHolder;
041import javax.faces.component.UIComponent;
042import javax.faces.context.FacesContext;
043import javax.faces.validator.ValidatorException;
044
045import org.apache.commons.lang3.StringUtils;
046import org.apache.commons.logging.Log;
047import org.apache.commons.logging.LogFactory;
048import org.jboss.seam.annotations.In;
049import org.jboss.seam.annotations.Name;
050import org.jboss.seam.annotations.Observer;
051import org.jboss.seam.annotations.Scope;
052import org.jboss.seam.annotations.intercept.BypassInterceptors;
053import org.jboss.seam.annotations.web.RequestParameter;
054import org.jboss.seam.core.Events;
055import org.jboss.seam.faces.FacesMessages;
056import org.jboss.seam.international.StatusMessage;
057import org.nuxeo.ecm.core.api.CoreSession;
058import org.nuxeo.ecm.core.api.DocumentModel;
059import org.nuxeo.ecm.core.api.DocumentNotFoundException;
060import org.nuxeo.ecm.core.api.IdRef;
061import org.nuxeo.ecm.core.api.NuxeoException;
062import org.nuxeo.ecm.core.api.NuxeoPrincipal;
063import org.nuxeo.ecm.core.api.UnrestrictedSessionRunner;
064import org.nuxeo.ecm.core.api.security.SecurityConstants;
065import org.nuxeo.ecm.platform.actions.Action;
066import org.nuxeo.ecm.platform.actions.ActionContext;
067import org.nuxeo.ecm.platform.actions.ELActionContext;
068import org.nuxeo.ecm.platform.actions.ejb.ActionManager;
069import org.nuxeo.ecm.platform.contentview.seam.ContentViewActions;
070import org.nuxeo.ecm.platform.forms.layout.api.BuiltinModes;
071import org.nuxeo.ecm.platform.forms.layout.api.LayoutDefinition;
072import org.nuxeo.ecm.platform.forms.layout.api.LayoutRowDefinition;
073import org.nuxeo.ecm.platform.forms.layout.api.WidgetDefinition;
074import org.nuxeo.ecm.platform.forms.layout.api.WidgetReference;
075import org.nuxeo.ecm.platform.forms.layout.service.WebLayoutManager;
076import org.nuxeo.ecm.platform.routing.api.DocumentRoutingConstants;
077import org.nuxeo.ecm.platform.routing.api.DocumentRoutingService;
078import org.nuxeo.ecm.platform.routing.api.exception.DocumentRouteException;
079import org.nuxeo.ecm.platform.routing.core.impl.GraphNode;
080import org.nuxeo.ecm.platform.routing.core.impl.GraphNode.Button;
081import org.nuxeo.ecm.platform.routing.core.impl.GraphRoute;
082import org.nuxeo.ecm.platform.task.Task;
083import org.nuxeo.ecm.platform.task.TaskEventNames;
084import org.nuxeo.ecm.platform.task.TaskImpl;
085import org.nuxeo.ecm.platform.ui.web.api.NavigationContext;
086import org.nuxeo.ecm.platform.ui.web.util.ComponentUtils;
087import org.nuxeo.ecm.webapp.action.ActionContextProvider;
088import org.nuxeo.ecm.webapp.documentsLists.DocumentsListsManager;
089import org.nuxeo.ecm.webapp.helpers.EventNames;
090import org.nuxeo.runtime.api.Framework;
091
092/**
093 * Task validators
094 *
095 * @since 5.6
096 */
097@Scope(CONVERSATION)
098@Name("routingTaskActions")
099public class RoutingTaskActionsBean implements Serializable {
100
101    private static final long serialVersionUID = 1L;
102
103    private static final Log log = LogFactory.getLog(RoutingTaskActionsBean.class);
104
105    public static final String SUBJECT_PATTERN = "([a-zA-Z_0-9]*(:)[a-zA-Z_0-9]*)";
106
107    /**
108     * Runtime property name, that makes it possible to cache actions available on a given task, depending on its type.
109     * <p>
110     * This caching is global to all tasks in the platform, and will not work correctly if some tasks are filtering some
111     * actions depending on local variables, for instance.
112     *
113     * @since 5.7
114     */
115    public static final String CACHE_ACTIONS_PER_TASK_TYPE_PROP_NAME = "org.nuxeo.routing.cacheActionsPerTaskType";
116
117    @In(create = true, required = false)
118    protected transient CoreSession documentManager;
119
120    @In(required = true, create = true)
121    protected NavigationContext navigationContext;
122
123    @In(create = true, required = false)
124    protected FacesMessages facesMessages;
125
126    @In(create = true)
127    protected Map<String, String> messages;
128
129    @In(create = true)
130    protected transient DocumentsListsManager documentsListsManager;
131
132    @In(create = true, required = false)
133    protected transient ActionContextProvider actionContextProvider;
134
135    @In(create = true, required = false)
136    protected ContentViewActions contentViewActions;
137
138    @RequestParameter("button")
139    protected String button;
140
141    protected ActionManager actionService;
142
143    protected Map<String, TaskInfo> tasksInfoCache = new HashMap<String, TaskInfo>();
144
145    protected Task currentTask;
146
147    protected List<String> formVariablesToRemove;
148
149    public void validateTaskDueDate(FacesContext context, UIComponent component, Object value) {
150        final String DATE_FORMAT = "dd/MM/yyyy";
151        SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT);
152
153        String messageString = null;
154        if (value != null) {
155            try {
156                Date dueDate = dateFormat.parse(dateFormat.format((Date) value));
157                Date today = dateFormat.parse(dateFormat.format(new Date()));
158                if (dueDate.before(today)) {
159                    messageString = "label.workflow.error.outdated_duedate";
160                }
161            } catch (ParseException e) {
162                messageString = "label.workflow.error.date_parsing";
163            }
164        }
165
166        if (messageString != null) {
167            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, ComponentUtils.translate(context,
168                    "label.workflow.error.outdated_duedate"), null);
169            ((EditableValueHolder) component).setValid(false);
170            context.addMessage(component.getClientId(context), message);
171        }
172    }
173
174    public void validateSubject(FacesContext context, UIComponent component, Object value) {
175        if (!((value instanceof String) && ((String) value).matches(SUBJECT_PATTERN))) {
176            FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_ERROR, ComponentUtils.translate(context,
177                    "label.document.routing.invalid.subject"), null);
178            context.addMessage(null, message);
179            throw new ValidatorException(message);
180        }
181    }
182
183    public String getTaskLayout(Task task) {
184        return getTaskInfo(task, true).layout;
185    }
186
187    public List<Action> getTaskButtons(Task task) {
188        List<Button> buttons = getTaskInfo(task, true).buttons;
189        List<Action> actions = new ArrayList<Action>();
190
191        DocumentModel workflowInstance = documentManager.getDocument(new IdRef(task.getProcessId()));
192        GraphRoute workflow = workflowInstance.getAdapter(GraphRoute.class);
193        if (workflow == null) {
194            // task was not created by a workflow process , no actions to
195            // display;
196            return actions;
197        }
198        GraphNode node = workflow.getNode(task.getType());
199        for (Button button : buttons) {
200            Action action = new Action(button.getName(), Action.EMPTY_CATEGORIES);
201            action.setLabel(button.getLabel());
202            boolean displayAction = true;
203            if (StringUtils.isNotEmpty(button.getFilter())) {
204                ActionContext actionContext = actionContextProvider.createActionContext();
205                if (node != null) {
206                    Map<String, Object> workflowContextualInfo = new HashMap<String, Object>();
207                    workflowContextualInfo.putAll(node.getWorkflowContextualInfo(documentManager, true));
208                    actionContext.putAllLocalVariables(workflowContextualInfo);
209                }
210                displayAction = getActionService().checkFilter(button.filter, actionContext);
211            }
212            if (displayAction) {
213                actions.add(action);
214            }
215        }
216        return actions;
217    }
218
219    public String endTask(Task task) {
220        // collect form data
221        Map<String, Object> data = new HashMap<String, Object>();
222        Map<String, Serializable> formVariables = getFormVariables(task);
223        if (getFormVariables(task) != null) {
224            data.put("WorkflowVariables", getFormVariables(task));
225            data.put("NodeVariables", getFormVariables(task));
226            // if there is a comment on the submitted form, pass it to be
227            // logged
228            // by audit
229            if (formVariables.containsKey(GraphNode.NODE_VARIABLE_COMMENT)) {
230                data.put(GraphNode.NODE_VARIABLE_COMMENT, formVariables.get(GraphNode.NODE_VARIABLE_COMMENT));
231            }
232        }
233        // add the button name that was clicked
234        try {
235            DocumentRoutingService routing = Framework.getService(DocumentRoutingService.class);
236            routing.endTask(documentManager, task, data, button);
237            facesMessages.add(StatusMessage.Severity.INFO, messages.get("workflow.feedback.info.taskEnded"));
238        } catch (DocumentRouteException e) {
239            log.error(e, e);
240            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.taskEnded"));
241        }
242        Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
243        clear(task.getId());
244        if (navigationContext.getCurrentDocument() != null
245                && documentManager.hasPermission(navigationContext.getCurrentDocument().getRef(),
246                        SecurityConstants.READ)) {
247            return null;
248        }
249        // if the user only had temporary permissions on the current doc given
250        // by the workflow
251        navigationContext.setCurrentDocument(null);
252        return navigationContext.goHome();
253    }
254
255    private void clear(String taskId) {
256        button = null;
257        if (tasksInfoCache.containsKey(taskId)) {
258            tasksInfoCache.remove(taskId);
259        }
260    }
261
262    public Map<String, Serializable> getFormVariables(Task task) {
263        return getTaskInfo(task, true).formVariables;
264    }
265
266    public class TaskInfo {
267        protected HashMap<String, Serializable> formVariables;
268
269        protected String layout;
270
271        protected boolean canBeReassigned;
272
273        protected List<Button> buttons;
274
275        protected List<String> actors;
276
277        protected String comment;
278
279        protected String taskId;
280
281        protected String name;
282
283        protected TaskInfo(String taskId, HashMap<String, Serializable> formVariables, String layout,
284                List<Button> buttons, boolean canBeReassigned, String name) {
285            this.formVariables = formVariables;
286            this.layout = layout;
287            this.buttons = buttons;
288            this.canBeReassigned = canBeReassigned;
289            this.taskId = taskId;
290            this.name = name;
291        }
292
293        public List<String> getActors() {
294            return actors;
295        }
296
297        public void setActors(List<String> actors) {
298            this.actors = actors;
299        }
300
301        public String getComment() {
302            return comment;
303        }
304
305        public void setComment(String comment) {
306            this.comment = comment;
307        }
308
309        public boolean isCanBeReassigned() {
310            return canBeReassigned;
311        }
312
313        public String getTaskId() {
314            return taskId;
315        }
316
317        public String getName() {
318            return name;
319        }
320    }
321
322    // we have to be unrestricted to get this info
323    // because the current user may not be the one that started the
324    // workflow
325    public TaskInfo getTaskInfo(final Task task, final boolean getFormVariables) {
326        if (tasksInfoCache.containsKey(task.getId())) {
327            return tasksInfoCache.get(task.getId());
328        }
329        final String routeDocId = task.getVariable(DocumentRoutingConstants.TASK_ROUTE_INSTANCE_DOCUMENT_ID_KEY);
330        final String nodeId = task.getVariable(DocumentRoutingConstants.TASK_NODE_ID_KEY);
331        if (routeDocId == null) {
332            throw new NuxeoException("Can not get the source graph for this task");
333        }
334        if (nodeId == null) {
335            throw new NuxeoException("Can not get the source node for this task");
336        }
337        final TaskInfo[] res = new TaskInfo[1];
338        new UnrestrictedSessionRunner(documentManager) {
339            @Override
340            public void run() {
341                DocumentModel doc = session.getDocument(new IdRef(routeDocId));
342                GraphRoute route = doc.getAdapter(GraphRoute.class);
343                GraphNode node = route.getNode(nodeId);
344                HashMap<String, Serializable> map = new HashMap<String, Serializable>();
345                if (getFormVariables) {
346                    map.putAll(node.getVariables());
347                    map.putAll(route.getVariables());
348                }
349                res[0] = new TaskInfo(task.getId(), map, node.getTaskLayout(), node.getTaskButtons(),
350                        node.allowTaskReassignment(), task.getName());
351            }
352        }.runUnrestricted();
353        // don't add tasks in cache when are fetched without the form variables
354        // for
355        // bulk processing
356        if (getFormVariables) {
357            tasksInfoCache.put(task.getId(), res[0]);
358        }
359        return res[0];
360    }
361
362    /**
363     * @since 5.6
364     */
365    public boolean isRoutingTask(Task task) {
366        return task.getDocument().hasFacet(DocumentRoutingConstants.ROUTING_TASK_FACET_NAME);
367    }
368
369    /**
370     * @since 5.6
371     */
372    public List<Action> getTaskActions(Task task) {
373        return new ArrayList<Action>(getTaskActionsMap(task).values());
374    }
375
376    // temp method because Studio also refers to empty layouts
377    protected boolean isLayoutEmpty(String layoutName) {
378        if (layoutName == null || layoutName.isEmpty()) {
379            return true;
380        }
381        // explore the layout and find out if it contains only empty widgets
382        WebLayoutManager lm = Framework.getService(WebLayoutManager.class);
383        LayoutDefinition layout = lm.getLayoutDefinition(layoutName);
384        if (layout == null || layout.isEmpty()) {
385            return true;
386        }
387        return false;
388    }
389
390    /**
391     * Helper to generate a unique action id for all task types
392     *
393     * @since 5.7
394     */
395    protected String getTaskActionId(Task task, String buttonId) {
396        return String.format("%s_%s", task.getType(), buttonId);
397    }
398
399    /**
400     * @since 5.6
401     */
402    public Map<String, Action> getTaskActionsMap(Task task) {
403        Map<String, Action> actions = new LinkedHashMap<String, Action>();
404        TaskInfo taskInfo = getTaskInfo(task, true);
405        String layout = taskInfo.layout;
406        List<Button> buttons = taskInfo.buttons;
407
408        boolean addLayout = !isLayoutEmpty(layout);
409        Map<String, Serializable> props = null;
410        if (addLayout) {
411            props = new HashMap<String, Serializable>();
412            props.put("layout", layout);
413            props.put("formVariables", taskInfo.formVariables);
414        }
415
416        if (buttons != null && !buttons.isEmpty()) {
417            for (Button button : buttons) {
418                String buttonId = button.getName();
419                String id = getTaskActionId(task, buttonId);
420                Action action = new Action(id, Action.EMPTY_CATEGORIES);
421                action.setLabel(button.getLabel());
422                Map<String, Serializable> actionProps = new HashMap<String, Serializable>();
423                actionProps.put("buttonId", buttonId);
424                if (addLayout) {
425                    actionProps.putAll(props);
426                    action.setProperties(actionProps);
427                    action.setType("fancybox");
428                } else {
429                    action.setProperties(actionProps);
430                    action.setType("link");
431                }
432                boolean displayAction = true;
433                if (StringUtils.isNotEmpty(button.getFilter())) {
434                    displayAction = getActionService().checkFilter(button.filter,
435                            actionContextProvider.createActionContext());
436                }
437                if (displayAction) {
438                    actions.put(id, action);
439                }
440            }
441        }
442
443        // If there is a form attached to these tasks, add a generic
444        // process action to open the fancy box.
445        // The form of the first task will be displayed, but all the tasks
446        // concerned by this action share the same form, as they share the
447        // same type.
448        if (addLayout && !actions.isEmpty()) {
449            String id = getTaskActionId(task, "process_task");
450            Action processAction = new Action(id, Action.EMPTY_CATEGORIES);
451
452            formVariablesToRemove = new ArrayList<>();
453            WebLayoutManager layoutService = Framework.getService(WebLayoutManager.class);
454            LayoutDefinition taskLayout = layoutService.getLayoutDefinition(taskInfo.layout);
455            if (taskLayout != null) {
456                for (LayoutRowDefinition row : taskLayout.getRows()) {
457                    for (WidgetReference widgetRef : row.getWidgetReferences()) {
458                        WidgetDefinition widgetDefinition = taskLayout.getWidgetDefinition(widgetRef.getName());
459                        if (widgetDefinition == null) {
460                            continue;
461                        }
462
463                        String mode = widgetDefinition.getMode(BuiltinModes.EDIT);
464                        ActionContext el = new ELActionContext();
465                        el.setCurrentPrincipal((NuxeoPrincipal) documentManager.getPrincipal());
466                        el.setCurrentDocument(navigationContext.getCurrentDocument());
467                        mode = el.evalExpression(mode, String.class);
468                        if (mode != null && !mode.equals(BuiltinModes.EDIT)) {
469                            Arrays.stream(widgetDefinition.getFieldDefinitions()).forEach((field) -> {
470                                // workflow form fields are always like "['$variable']"
471                                // remove both [' and '] to keep only the variable name
472                                String fieldName = field.getFieldName().replaceAll("^\\['|']$", "");
473                                formVariablesToRemove.add(fieldName);
474                            });
475                        }
476                    }
477                }
478            }
479
480            processAction.setProperties(props);
481            processAction.setType("process_task");
482            actions.put(id, processAction);
483        }
484
485        return actions;
486    }
487
488    /**
489     * Returns actions for task document buttons defined in the workflow graph
490     *
491     * @since 5.6
492     */
493    @SuppressWarnings("boxing")
494    public List<Action> getTaskActions(String selectionListName) {
495        Map<String, Action> actions = new LinkedHashMap<String, Action>();
496        Map<String, Map<String, Action>> actionsPerTaskType = new LinkedHashMap<String, Map<String, Action>>();
497        Map<String, Integer> actionsCounter = new HashMap<String, Integer>();
498        List<DocumentModel> docs = documentsListsManager.getWorkingList(selectionListName);
499        boolean cachePerType = Boolean.TRUE.equals(Boolean.valueOf(Framework.getProperty(CACHE_ACTIONS_PER_TASK_TYPE_PROP_NAME)));
500        int taskDocsNum = 0;
501        if (docs != null && !docs.isEmpty()) {
502            for (DocumentModel doc : docs) {
503                if (doc.hasFacet(DocumentRoutingConstants.ROUTING_TASK_FACET_NAME)) {
504                    Task task = new TaskImpl(doc);
505                    String taskType = task.getType();
506                    Map<String, Action> taskActions = Collections.emptyMap();
507                    // if caching per type, fill the per type map, else update
508                    // actions directly
509                    if (cachePerType) {
510                        if (actionsPerTaskType.containsKey(taskType)) {
511                            taskActions = actionsPerTaskType.get(taskType);
512                        } else {
513                            taskActions = getTaskActionsMap(task);
514                            actionsPerTaskType.put(taskType, taskActions);
515                        }
516                    } else {
517                        taskActions = getTaskActionsMap(task);
518                        actions.putAll(taskActions);
519                    }
520                    for (String actionId : taskActions.keySet()) {
521                        Integer count = actionsCounter.get(actionId);
522                        if (count == null) {
523                            actionsCounter.put(actionId, 1);
524                        } else {
525                            actionsCounter.put(actionId, count + 1);
526                        }
527                    }
528                    taskDocsNum++;
529                }
530            }
531        }
532        if (cachePerType) {
533            // initialize actions for cache map
534            for (Map<String, Action> actionsPerType : actionsPerTaskType.values()) {
535                actions.putAll(actionsPerType);
536            }
537        }
538        List<Action> res = new ArrayList<Action>(actions.values());
539        for (Action action : res) {
540            if (!actionsCounter.get(action.getId()).equals(taskDocsNum)) {
541                action.setAvailable(false);
542            }
543        }
544        return res;
545    }
546
547    /**
548     * Ends a task given a selection list name and an action
549     *
550     * @since 5.6
551     */
552    @SuppressWarnings("unchecked")
553    public String endTasks(String selectionListName, Action taskAction) {
554        // collect form data
555        Map<String, Object> data = new HashMap<String, Object>();
556        String buttonId = (String) taskAction.getProperties().get("buttonId");
557        Map<String, Serializable> formVariables = (Map<String, Serializable>) taskAction.getProperties().get(
558                "formVariables");
559
560        // Remove form variables that should not be updated
561        if (formVariablesToRemove != null && formVariables != null) {
562            formVariablesToRemove.forEach(formVariables::remove);
563        }
564        formVariablesToRemove = null;
565
566        if (formVariables != null && !formVariables.isEmpty()) {
567            data.put("WorkflowVariables", formVariables);
568            data.put("NodeVariables", formVariables);
569            // if there is a comment on the submitted form, pass it to be
570            // logged by audit
571            if (formVariables.containsKey(GraphNode.NODE_VARIABLE_COMMENT)) {
572                data.put(GraphNode.NODE_VARIABLE_COMMENT, formVariables.get(GraphNode.NODE_VARIABLE_COMMENT));
573            }
574        }
575
576        // get task documents
577        boolean hasErrors = false;
578        DocumentRoutingService routing = Framework.getService(DocumentRoutingService.class);
579        List<DocumentModel> docs = documentsListsManager.getWorkingList(selectionListName);
580        if (docs != null && !docs.isEmpty()) {
581            for (DocumentModel doc : docs) {
582                if (doc.hasFacet(DocumentRoutingConstants.ROUTING_TASK_FACET_NAME)) {
583                    // add the button name that was clicked
584                    try {
585                        routing.endTask(documentManager, new TaskImpl(doc), data, buttonId);
586                    } catch (DocumentRouteException e) {
587                        log.error(e, e);
588                        hasErrors = true;
589                    }
590                }
591            }
592        }
593        if (hasErrors) {
594            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.tasksEnded"));
595        } else {
596            facesMessages.add(StatusMessage.Severity.INFO, messages.get("workflow.feedback.info.tasksEnded"));
597        }
598        // reset selection list
599        documentsListsManager.resetWorkingList(selectionListName);
600        // raise document change event to trigger refresh of content views
601        // listing task documents.
602        Events.instance().raiseEvent(EventNames.DOCUMENT_CHANGED);
603        Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
604        return null;
605    }
606
607    private ActionManager getActionService() {
608        if (actionService == null) {
609            actionService = Framework.getService(ActionManager.class);
610        }
611        return actionService;
612    }
613
614    /***
615     * @since 5.7
616     */
617    @Observer(value = { TaskEventNames.WORKFLOW_TASK_COMPLETED, TaskEventNames.WORKFLOW_TASK_REASSIGNED,
618            TaskEventNames.WORKFLOW_TASK_DELEGATED })
619    @BypassInterceptors
620    public void OnTaskCompleted() {
621        if (contentViewActions != null) {
622            contentViewActions.refreshOnSeamEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
623            contentViewActions.resetPageProviderOnSeamEvent(TaskEventNames.WORKFLOW_TASK_COMPLETED);
624        }
625        tasksInfoCache.clear();
626        currentTask = null;
627    }
628
629    /**
630     * @since 5.7.3
631     */
632    public String reassignTask(TaskInfo taskInfo) {
633        try {
634            Framework.getService(DocumentRoutingService.class).reassignTask(documentManager, taskInfo.getTaskId(),
635                    taskInfo.getActors(), taskInfo.getComment());
636            Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_REASSIGNED);
637        } catch (DocumentRouteException e) {
638            log.error(e);
639            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.taskEnded"));
640        }
641        return null;
642    }
643
644    /**
645     * @since 5.7.3
646     */
647    public String getWorkflowTitle(String instanceId) {
648        String workflowTitle = "";
649
650        try {
651            DocumentModel routeInstance = documentManager.getDocument(new IdRef(instanceId));
652            workflowTitle = routeInstance.getTitle();
653        } catch (DocumentNotFoundException e) {
654            log.error("Can not fetch route instance with id " + instanceId, e);
655        }
656        return workflowTitle;
657    }
658
659    /**
660     * @since 5.8
661     */
662    public String delegateTask(TaskInfo taskInfo) {
663        try {
664            Framework.getService(DocumentRoutingService.class).delegateTask(documentManager, taskInfo.getTaskId(),
665                    taskInfo.getActors(), taskInfo.getComment());
666            Events.instance().raiseEvent(TaskEventNames.WORKFLOW_TASK_DELEGATED);
667        } catch (DocumentRouteException e) {
668            log.error(e);
669            facesMessages.add(StatusMessage.Severity.ERROR, messages.get("workflow.feedback.error.taskEnded"));
670        }
671        return null;
672    }
673
674    /**
675     * @since 5.8
676     */
677    public String navigateToTask(DocumentModel taskDoc) {
678        setCurrentTask(taskDoc.getAdapter(Task.class));
679        return null;
680    }
681
682    /**
683     * @since 5.8
684     */
685    public String navigateToTasksView() {
686        setCurrentTask(null);
687        return null;
688    }
689
690    /**
691     * @since 5.8
692     */
693    public Task getCurrentTask() {
694        return currentTask;
695    }
696
697    /**
698     * @since 5.8
699     */
700    public void setCurrentTask(Task currentTask) {
701        this.currentTask = currentTask;
702    }
703
704    /**
705     * Added to avoid an error when opening a task created @before 5.8 see NXP-14047
706     *
707     * @since 5.9.3, 5.8.0-HF10
708     * @return
709     */
710    @SuppressWarnings("deprecation")
711    public List<String> getCurrentTaskTargetDocumentsIds() {
712        Set<String> uniqueTargetDocIds = new HashSet<String>();
713        List<String> docIds = new ArrayList<String>();
714        if (currentTask == null) {
715            return docIds;
716        }
717        uniqueTargetDocIds.addAll(currentTask.getTargetDocumentsIds());
718        docIds.addAll(uniqueTargetDocIds);
719        return docIds.isEmpty() ? null : docIds;
720    }
721
722    /**
723     * @since 5.8 - Define if action reassign task can be displayed.
724     */
725    public boolean canBeReassign() {
726        if (currentTask == null) {
727            return false;
728        }
729        DocumentModel workflowInstance = documentManager.getDocument(new IdRef(currentTask.getProcessId()));
730        GraphRoute workflow = workflowInstance.getAdapter(GraphRoute.class);
731        if (workflow == null) {
732            return false;
733        }
734        GraphNode node = workflow.getNode(currentTask.getType());
735        return node.allowTaskReassignment() && !currentTask.getDelegatedActors().contains(documentManager.getPrincipal().getName());
736    }
737}