/*
* Copyright 2010 Last.fm
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package fm.last.citrine.web;
import static fm.last.citrine.web.Constants.PARAM_CANCEL;
import static fm.last.citrine.web.Constants.PARAM_TASK_ID;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.springframework.validation.BindException;
import org.springframework.validation.Errors;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.SimpleFormController;
import org.springframework.web.servlet.view.RedirectView;
import fm.last.citrine.model.Task;
import fm.last.citrine.service.TaskManager;
/**
* Controller which manages the links between a Task and it's child Tasks.
*/
public class ChildTasksFormController extends SimpleFormController {
private static Logger log = Logger.getLogger(ChildTasksFormController.class);
private TaskManager taskManager;
private String getSuccessView(String selectedGroupName) {
if (StringUtils.isEmpty(selectedGroupName)) {
selectedGroupName = Constants.GROUP_NAME_ALL;
}
return "tasks.do?" + Constants.PARAM_SELECTED_GROUP_NAME + "=" + selectedGroupName;
}
@Override
protected Map<String, Object> referenceData(HttpServletRequest request, Object command, Errors errors)
throws Exception {
Map<String, Object> referenceData = new HashMap<String, Object>();
Task task = ((TaskChildCandidatesDTO) command).getTask();
referenceData.put("childTasks", task.getChildTasks()); // existing child tasks
referenceData.put("candidateChildTasks", taskManager.findCandidateChildren(task)); // potential child tasks
referenceData.put(Constants.PARAM_SELECTED_GROUP_NAME, request.getParameter(Constants.PARAM_SELECTED_GROUP_NAME));
return referenceData;
}
@Override
protected Object formBackingObject(HttpServletRequest request) throws ServletException {
String idString = request.getParameter(PARAM_TASK_ID);
TaskChildCandidatesDTO backingObject = null;
if (request.getParameter(PARAM_CANCEL) == null && null != idString && !idString.equals("") && !idString.equals("0")) {
long taskId = Long.parseLong(idString);
Task task = taskManager.get(taskId);
backingObject = new TaskChildCandidatesDTO(task);
} else {
backingObject = new TaskChildCandidatesDTO();
}
String selectedGroupName = request.getParameter(Constants.PARAM_SELECTED_GROUP_NAME);
if (selectedGroupName != null && !(Constants.GROUP_NAME_ALL.equals(selectedGroupName))) {
backingObject.setSelectedGroupName(selectedGroupName);
}
return backingObject;
}
@Override
public ModelAndView processFormSubmission(HttpServletRequest request, HttpServletResponse response, Object command,
BindException errors) throws Exception {
if (request.getParameter(PARAM_CANCEL) != null) {
TaskChildCandidatesDTO dto = ((TaskChildCandidatesDTO) command);
return new ModelAndView(new RedirectView(getSuccessView(dto.getSelectedGroupName())));
}
return super.processFormSubmission(request, response, command, errors);
}
@Override
public ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, Object command,
BindException errors) {
TaskChildCandidatesDTO dto = ((TaskChildCandidatesDTO) command);
Task task = taskManager.get(dto.getTask().getId());
Set<Task> newChildTasks = new HashSet<Task>(); // list which will replace existing child tasks
if (dto.getCandidateChildTaskIds() != null) {
for (long candidateTaskId : dto.getCandidateChildTaskIds()) {
newChildTasks.add(taskManager.get(candidateTaskId));
}
}
if (dto.getChildTaskIds() != null) {
for (long candidateTaskId : dto.getChildTaskIds()) {
newChildTasks.add(taskManager.get(candidateTaskId));
}
}
task.setChildTasks(newChildTasks);
taskManager.save(task);
return new ModelAndView(new RedirectView(getSuccessView(dto.getSelectedGroupName())));
}
/**
* @return the jobManager
*/
public TaskManager getTaskManager() {
return taskManager;
}
/**
* @param jobManager the jobManager to set
*/
public void setTaskManager(TaskManager jobManager) {
this.taskManager = jobManager;
}
}