<?php
/**
 * The control file of task module of ZenTaoPMS.
 *
 * @copyright   Copyright 2009-2015 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
 * @license     ZPL (http://zpl.pub/page/zplv11.html)
 * @author      Chunsheng Wang <chunsheng@cnezsoft.com>
 * @package     task
 * @version     $Id: control.php 5106 2013-07-12 01:28:54Z chencongzhi520@gmail.com $
 * @link        http://www.zentao.net
 */
class task extends control
{
    /**
     * Construct function, load model of project and story modules.
     * 
     * @access public
     * @return void
     */
    public function __construct()
    {
        parent::__construct();
        $this->loadModel('project');
        $this->loadModel('story');
        $this->loadModel('tree');
    }

    /**
     * Create a task.
     * 
     * @param  int    $projectID 
     * @param  int    $storyID 
     * @param  int    $moduleID 
     * @param  int    $taskID
     * @access public
     * @return void
     */
    public function create($projectID = 0, $storyID = 0, $moduleID = 0, $taskID = 0)
    {
        $task = new stdClass();
        $task->module      = $moduleID;
        $task->assignedTo  = '';
        $task->name        = '';
        $task->story       = $storyID;
        $task->type        = '';
        $task->pri         = '';
        $task->estimate    = '';
        $task->desc        = '';
        $task->estStarted  = '';
        $task->deadline    = '';
        $task->mailto      = '';
        if($taskID > 0)
        {
            $task      = $this->task->getByID($taskID);
            $projectID = $task->project;
        }

        $project   = $this->project->getById($projectID); 
        $taskLink  = $this->createLink('project', 'browse', "projectID=$projectID&tab=task");
        $storyLink = $this->session->storyList ? $this->session->storyList : $this->createLink('project', 'story', "projectID=$projectID");

        /* Set menu. */
        $this->project->setMenu($this->project->getPairs(), $project->id);

        if(!empty($_POST))
        {
            $response['result']  = 'success';
            $response['message'] = '';

            $tasksID = $this->task->create($projectID);
            if(dao::isError())
            {
                $response['result']  = 'fail';
                $response['message'] = dao::getError();
                $this->send($response);
            }

            /* if the count of tasksID is 1 then check exists. */
            if(count($tasksID) == 1)
            {
                $taskID = current($tasksID);
                if($taskID['status'] == 'exists')
                {
                    $response['locate']  = $this->createLink('task', 'view', "taskID={$taskID['id']}");
                    $response['message'] = sprintf($this->lang->duplicate, $this->lang->task->common);
                    $this->send($response);
                }
            }

            /* Create actions. */
            $this->loadModel('action');
            foreach($tasksID as $taskID)
            {
                /* if status is exists then this task has exists not new create. */
                if($taskID['status'] == 'exists') continue;

                $taskID   = $taskID['id'];
                $actionID = $this->action->create('task', $taskID, 'Opened', '');
                $this->sendmail($taskID, $actionID);
            }            

            /* If link from no head then reload*/
            if(isonlybody())
            {
                $response['locate'] = 'reload';
                $response['target'] = 'parent';
                $this->send($response);
            }

            /* Locate the browser. */
            if($this->post->after == 'continueAdding')
            {
                $response['message'] = $this->lang->task->successSaved . $this->lang->task->afterChoices['continueAdding'];
                $response['locate']  = $this->createLink('task', 'create', "projectID=$projectID&storyID={$this->post->story}&moduleID=$moduleID");
                $this->send($response);
            }
            elseif($this->post->after == 'toTaskList')
            {
                $response['locate'] = $taskLink;
                $this->send($response);
            }
            elseif($this->post->after == 'toStoryList')
            {
                $response['locate'] = $storyLink;
                $this->send($response);
            }
            else
            {
                $response['locate'] = $taskLink;
                $this->send($response);
            }
        }

        $users            = $this->loadModel('user')->getPairs('nodeleted|noclosed');
        $stories          = $this->story->getProjectStoryPairs($projectID);
        $members          = $this->project->getTeamMemberPairs($projectID, 'nodeleted');
        $contactLists     = $this->user->getContactLists($this->app->user->account, 'withnote');
        $moduleOptionMenu = $this->tree->getTaskOptionMenu($projectID);

        $title      = $project->name . $this->lang->colon . $this->lang->task->create;
        $position[] = html::a($taskLink, $project->name);
        $position[] = $this->lang->task->common;
        $position[] = $this->lang->task->create;

        $this->view->title            = $title;
        $this->view->position         = $position;
        $this->view->project          = $project;
        $this->view->task             = $task;
        $this->view->users            = $users;
        $this->view->stories          = $stories;
        $this->view->members          = $members;
        $this->view->contactLists     = $contactLists;
        $this->view->moduleOptionMenu = $moduleOptionMenu;
        $this->display();
    }

    /**
     * Batch create task.
     * 
     * @param  int    $projectID 
     * @param  int    $storyID 
     * @access public
     * @return void
     */
    public function batchCreate($projectID = 0, $storyID = 0, $iframe = 0)
    {
        $project   = $this->project->getById($projectID); 
        $taskLink  = $this->createLink('project', 'browse', "projectID=$projectID&tab=task");
        $storyLink = $this->session->storyList ? $this->session->storyList : $this->createLink('project', 'story', "projectID=$projectID");

        /* Set menu. */
        $this->project->setMenu($this->project->getPairs(), $project->id);

        if(!empty($_POST))
        {
            $mails = $this->task->batchCreate($projectID);
            if(dao::isError()) die(js::error(dao::getError()));

            foreach($mails as $mail) $this->sendmail($mail->taskID, $mail->actionID);

            /* Locate the browser. */
            if($iframe) die(js::reload('parent.parent'));
            die(js::locate($storyLink, 'parent'));
        }

        $stories = $this->story->getProjectStoryPairs($projectID, 0, 0, 'short');
        $members = $this->project->getTeamMemberPairs($projectID, 'nodeleted');
        $modules = $this->loadModel('tree')->getTaskOptionMenu($projectID);
        $title      = $project->name . $this->lang->colon . $this->lang->task->batchCreate;
        $position[] = html::a($taskLink, $project->name);
        $position[] = $this->lang->task->common;
        $position[] = $this->lang->task->batchCreate;

        $this->view->title    = $title;
        $this->view->position = $position;
        $this->view->project  = $project;
        $this->view->stories  = $stories;
        $this->view->modules  = $modules;
        $this->view->storyID  = $storyID;
        $this->view->story    = $this->loadModel('story')->getByID($storyID);
        $this->view->members  = $members;
        $this->display();
    }

    /**
     * Common actions of task module.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function commonAction($taskID)
    {
        $this->view->task    = $this->loadModel('task')->getByID($taskID);
        $this->view->project = $this->project->getById($this->view->task->project);
        $this->view->members = $this->project->getTeamMemberPairs($this->view->project->id ,'nodeleted');
        $this->view->actions = $this->loadModel('action')->getList('task', $taskID);

        /* Set menu. */
        $this->project->setMenu($this->project->getPairs(), $this->view->project->id);
        $this->view->position[] = html::a($this->createLink('project', 'browse', "project={$this->view->task->project}"), $this->view->project->name);
    }

    /**
     * Edit a task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function edit($taskID, $comment = false)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = array();
            $files   = array();
            if($comment == false)
            {
                $changes = $this->task->update($taskID);
                if(dao::isError()) die(js::error(dao::getError()));
                $files = $this->loadModel('file')->saveUpload('task', $taskID);
            }

            $task = $this->task->getById($taskID);
            if($this->post->comment != '' or !empty($changes) or !empty($files))
            {
                $action = !empty($changes) ? 'Edited' : 'Commented';
                $fileAction = !empty($files) ? $this->lang->addFiles . join(',', $files) . "\n" : '';
                $actionID = $this->action->create('task', $taskID, $action, $fileAction . $this->post->comment);
                if(!empty($changes)) $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }

            if($task->fromBug != 0)
            {
                foreach($changes as $change)
                {
                    if($change['field'] == 'status')
                    {
                        $confirmURL = $this->createLink('bug', 'view', "id=$task->fromBug");
                        $cancelURL  = $this->server->HTTP_REFERER;
                        die(js::confirm(sprintf($this->lang->task->remindBug, $task->fromBug), $confirmURL, $cancelURL, 'parent', 'parent'));
                    }
                }
            }
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $noclosedProjects = $this->project->getPairs('noclosed,nocode');
        unset($noclosedProjects[$this->view->project->id]);
        $this->view->projects = array($this->view->project->id => $this->view->project->name) + $noclosedProjects;

        if(!isset($members[$this->view->task->assignedTo])) $members[$this->view->task->assignedTo] = $this->view->task->assignedTo;
        $this->view->title      = $this->lang->task->edit . 'TASK' . $this->lang->colon . $this->view->task->name;
        $this->view->position[] = $this->lang->task->common;
        $this->view->position[] = $this->lang->task->edit;
        $this->view->stories    = $this->story->getProjectStoryPairs($this->view->project->id);
        $this->view->users      = $this->loadModel('user')->getPairs('nodeleted', "{$this->view->task->openedBy},{$this->view->task->canceledBy},{$this->view->task->closedBy}"); 
        $this->view->modules    = $this->tree->getTaskOptionMenu($this->view->task->project);
        $this->display();
    }

    /**
     * Batch edit task.
     * 
     * @param  int    $projectID 
     * @access public
     * @return void
     */
    public function batchEdit($projectID = 0)
    {
        if($this->post->names)
        {
            $allChanges = $this->task->batchUpdate();

            if(!empty($allChanges))
            {
                foreach($allChanges as $taskID => $changes)
                {
                    if(empty($changes)) continue;

                    $actionID = $this->loadModel('action')->create('task', $taskID, 'Edited');
                    $this->action->logHistory($actionID, $changes);
                    $this->sendmail($taskID, $actionID);

                    $task = $this->task->getById($taskID);
                    if($task->fromBug != 0)
                    {
                        foreach($changes as $change)
                        {
                            if($change['field'] == 'status')
                            {
                                $confirmURL = $this->createLink('bug', 'view', "id=$task->fromBug");
                                $cancelURL  = $this->server->HTTP_REFERER;
                                die(js::confirm(sprintf($this->lang->task->remindBug, $task->fromBug), $confirmURL, $cancelURL, 'parent', 'parent'));
                            }
                        }
                    }
                }
            }
            die(js::locate($this->session->taskList, 'parent'));
        }

        $taskIDList = $this->post->taskIDList ? $this->post->taskIDList : die(js::locate($this->session->taskList, 'parent'));

        /* The tasks of project. */
        if($projectID)
        {
            $project = $this->project->getById($projectID); 
            $this->project->setMenu($this->project->getPairs(), $project->id);
            $members = $this->project->getTeamMemberPairs($projectID, 'nodeleted');
            $members = $members + array('closed' => 'Closed');
            $this->view->title      = $project->name . $this->lang->colon . $this->lang->task->batchEdit;
            $this->view->position[] = html::a($this->createLink('project', 'browse', "project=$project->id"), $project->name);
            $this->view->project    = $project;
            $this->view->modules    = $this->tree->getTaskOptionMenu($projectID);
            $this->view->members    = $members;
        }
        /* The tasks of my. */
        else
        {
            $this->lang->task->menu = $this->lang->my->menu;
            $this->lang->set('menugroup.task', 'my');
            $this->lang->task->menuOrder = $this->lang->my->menuOrder;
            $this->loadModel('my')->setMenu();
            $this->view->position[] = html::a($this->createLink('my', 'task'), $this->lang->my->task);
            $this->view->title      = $this->lang->task->batchEdit;
            $this->view->users      = $this->loadModel('user')->getPairs('noletter');
        }

        /* Get edited tasks. */
        $tasks = $this->dao->select('*')->from(TABLE_TASK)->where('id')->in($taskIDList)->fetchAll('id');

        /* Judge whether the editedTasks is too large and set session. */
        $showSuhosinInfo = false;
        $showSuhosinInfo = $this->loadModel('common')->judgeSuhosinSetting(count($tasks), $this->config->task->batchEdit->columns);
        $this->app->session->set('showSuhosinInfo', $showSuhosinInfo);
        if($showSuhosinInfo) $this->view->suhosinInfo = $this->lang->suhosinInfo;

        /* Assign. */
        $this->view->position[]  = $this->lang->task->common;
        $this->view->position[]  = $this->lang->task->batchEdit;
        $this->view->projectID   = $projectID;
        $this->view->taskIDList  = $taskIDList;
        $this->view->tasks       = $tasks;
        $this->view->projectName = isset($project) ? $project->name : '';

        $this->display();
    }

    /**
     * Update assign of task 
     *
     * @param  int    $requestID
     * @access public
     * @return void
     */
    public function assignTo($projectID, $taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->assign($taskID);
            if(dao::isError()) die(js::error(dao::getError()));
            $actionID = $this->action->create('task', $taskID, 'Assigned', $this->post->comment, $this->post->assignedTo);
            $this->action->logHistory($actionID, $changes);
            $this->sendmail($taskID, $actionID);

            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon . $this->lang->task->assign;
        $this->view->position[] = $this->lang->task->assign;

        $this->view->users = $this->project->getTeamMemberPairs($projectID);
        $this->display();
    }

    /**
     * Batch update assign of task. 
     * 
     * @param  int    $project 
     * @access public
     * @return void
     */
    public function batchAssignTo($project)
    {
        if(!empty($_POST))
        {
            $taskIDList = $this->post->taskIDList;
            unset($_POST['taskIDList']);
            if(!is_array($taskIDList)) die(js::locate($this->createLink('project', 'task', "projectID=$project"), 'parent'));
            foreach($taskIDList as $taskID)
            {
                $this->loadModel('action');
                $changes = $this->task->assign($taskID);
                if(dao::isError()) die(js::error(dao::getError()));
                $actionID = $this->action->create('task', $taskID, 'Assigned', $this->post->comment, $this->post->assignedTo);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }
            die(js::locate($this->createLink('project', 'task', "projectID=$project"), 'parent'));
        }
    }

    /**
     * View a task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function view($taskID)
    {
        $task = $this->task->getById($taskID, true);
        if(!$task) die(js::error($this->lang->notFound) . js::locate('back'));

        if($task->fromBug != 0)
        {
            $bug = $this->loadModel('bug')->getById($task->fromBug);
            $task->bugSteps = '';
            if($bug)
            {
                $task->bugSteps = $bug->steps;
                foreach($bug->files as $file) $task->files[] = $file;
            }
            $this->view->fromBug = $bug;
        }
        else
        {
            $story = $this->story->getById($task->story);
            $task->storySpec = empty($story) ? '' : $story->spec;
        }

        /* Update action. */
        if($task->assignedTo == $this->app->user->account) $this->loadModel('action')->read('task', $taskID);

        /* Set menu. */
        $project = $this->project->getById($task->project);
        $this->project->setMenu($this->project->getPairs(), $project->id);

        $title      = "TASK#$task->id $task->name / $project->name";
        $position[] = html::a($this->createLink('project', 'browse', "projectID=$task->project"), $project->name);
        $position[] = $this->lang->task->common;
        $position[] = $this->lang->task->view;

        $this->view->title       = $title;
        $this->view->position    = $position;
        $this->view->project     = $project;
        $this->view->task        = $task;
        $this->view->actions     = $this->loadModel('action')->getList('task', $taskID);
        $this->view->users       = $this->loadModel('user')->getPairs('noletter');
        $this->view->preAndNext  = $this->loadModel('common')->getPreAndNextObject('task', $taskID);
        $this->view->product     = $this->tree->getProduct($task->module);
        $this->view->modulePath  = $this->tree->getParents($task->module);
        $this->display();
    }

    /**
     * Confirm story change 
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function confirmStoryChange($taskID)
    {
        $task = $this->task->getById($taskID);
        $this->dao->update(TABLE_TASK)->set('storyVersion')->eq($task->latestStoryVersion)->where('id')->eq($taskID)->exec();
        $this->loadModel('action')->create('task', $taskID, 'confirmed', '', $task->latestStoryVersion);
        die(js::reload('parent'));
    }

    /**
     * Start a task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function start($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->start($taskID);
            if(dao::isError()) die(js::error(dao::getError()));

            if($this->post->comment != '' or !empty($changes))
            {
                $act = $this->post->left == 0 ? 'Finished' : 'Started';
                $actionID = $this->action->create('task', $taskID, $act, $this->post->comment);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->start;
        $this->view->position[] = $this->lang->task->start;
        $this->view->users      = $this->loadModel('user')->getPairs('noletter'); 
        $this->display();
    }
    
    /**
     * Record consumed and estimate. 
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function recordEstimate($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->task->recordEstimate($taskID);
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->session->set('estimateList', $this->app->getURI(true));

        $this->view->task      = $this->task->getById($taskID);
        $this->view->estimates = $this->task->getTaskEstimate($taskID);
        $this->view->title     = $this->lang->task->record;
        $this->display();
    }

    /**
     * Edit consumed and estimate. 
     * 
     * @param  int    $estimateID 
     * @access public
     * @return void
     */
    public function editEstimate($estimateID)
    {
        $estimate = $this->task->getEstimateById($estimateID);
        if(!empty($_POST))
        {
            $changes = $this->task->updateEstimate($estimateID);
            if(dao::isError()) die(js::error(dao::getError()));

            $actionID = $this->loadModel('action')->create('task', $estimate->task, 'EditEstimate', $this->post->work);
            $this->action->logHistory($actionID, $changes);

            $url = $this->session->estimateList ? $this->session->estimateList : inlink('record', "taskID={$estimate->task}");
            die(js::locate($url, 'parent'));
        }

        $estimate = $this->task->getEstimateById($estimateID);

        $this->view->title      = $this->lang->task->editEstimate;
        $this->view->position[] = $this->lang->task->editEstimate;
        $this->view->estimate   = $estimate;
        $this->display();
    }

    /**
     * Delete estimate. 
     * 
     * @param  int    $estimateID 
     * @param  string $confirm 
     * @access public
     * @return void
     */
    public function deleteEstimate($estimateID, $confirm = 'no')
    {
        if($confirm == 'no')
        {
            die(js::confirm($this->lang->task->confirmDeleteEstimate, $this->createLink('task', 'deleteEstimate', "estimateID=$estimateID&confirm=yes")));
        }
        else
        {
            $estimate = $this->task->getEstimateById($estimateID);
            $changes  = $this->task->deleteEstimate($estimateID);
            if(dao::isError()) die(js::error(dao::getError()));

            $actionID = $this->loadModel('action')->create('task', $estimate->task, 'DeleteEstimate');
            $this->action->logHistory($actionID, $changes);
            die(js::reload('parent'));
        }
    }

    /**
     * Finish a task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function finish($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->finish($taskID);
            if(dao::isError()) die(js::error(dao::getError()));
            $files = $this->loadModel('file')->saveUpload('task', $taskID);

            $task = $this->task->getById($taskID);
            if($this->post->comment != '' or !empty($changes))
            {
                $fileAction = !empty($files) ? $this->lang->addFiles . join(',', $files) . "\n" : '';
                $actionID = $this->action->create('task', $taskID, 'Finished', $fileAction . $this->post->comment);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }

            if($task->fromBug != 0)
            {
                foreach($changes as $change)
                {
                    if($change['field'] == 'status')
                    {
                        $confirmURL = $this->createLink('bug', 'view', "id=$task->fromBug");
                        unset($_GET['onlybody']);
                        $cancelURL  = $this->createLink('task', 'view', "taskID=$taskID");
                        die(js::confirm(sprintf($this->lang->task->remindBug, $task->fromBug), $confirmURL, $cancelURL, 'parent', 'parent.parent'));
                    }
                }
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->finish;
        $this->view->position[] = $this->lang->task->finish;
        $this->view->date       = strftime("%Y-%m-%d %X", strtotime('now'));
        $this->view->users      = $this->loadModel('user')->getPairs('noletter');
       
        $this->display();
    }

    /**
     * Pause task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function pause($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->pause($taskID);
            if(dao::isError()) die(js::error(dao::getError()));

            if($this->post->comment != '' or !empty($changes))
            {
                $actionID = $this->action->create('task', $taskID, 'Paused', $this->post->comment);
                $this->action->logHistory($actionID, $changes);
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->pause;
        $this->view->position[] = $this->lang->task->pause;
        
        $this->display();
    }

    /**
     * Restart task 
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function restart($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->start($taskID);
            if(dao::isError()) die(js::error(dao::getError()));

            if($this->post->comment != '' or !empty($changes))
            {
                $act = $this->post->left == 0 ? 'Finished' : 'Restarted';
                $actionID = $this->action->create('task', $taskID, $act, $this->post->comment);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->restart;
        $this->view->position[] = $this->lang->task->restart;
        $this->view->users      = $this->loadModel('user')->getPairs('noletter'); 
        $this->display();
    }

    /**
     * Close a task.
     * 
     * @param  int      $taskID 
     * @access public
     * @return void
     */
    public function close($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->close($taskID);
            if(dao::isError()) die(js::error(dao::getError()));

            if($this->post->comment != '' or !empty($changes))
            {
                $actionID = $this->action->create('task', $taskID, 'Closed', $this->post->comment);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->finish;
        $this->view->position[] = $this->lang->task->finish;
        $this->view->users      = $this->loadModel('user')->getPairs('noletter'); 
        
        $this->display();

    }

    /**
     * Batch close tasks.
     * 
     * @access public
     * @return void
     */
    public function batchClose()
    {
        if($this->post->taskIDList)
        {
            $taskIDList = $this->post->taskIDList;
            unset($_POST['taskIDList']);
            unset($_POST['assignedTo']);
            $this->loadModel('action');

            $tasks = $this->task->getByList($taskIDList);
            foreach($tasks as $taskID => $task)
            {
                if($task->status == 'wait' or $task->status == 'doing')
                {
                    $skipTasks[$taskID] = $taskID;
                    continue;
                }

                if($task->status == 'closed') continue;

                $changes = $this->task->close($taskID);

                if($changes)
                {
                    $actionID = $this->action->create('task', $taskID, 'Closed', '');
                    $this->action->logHistory($actionID, $changes);
                    $this->sendmail($taskID, $actionID);
                }
            }
            if(isset($skipTasks)) echo js::alert(sprintf($this->lang->task->error->skipClose, join(',', $skipTasks)));
        }
        die(js::reload('parent'));
    }

    /**
     * Cancel a task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function cancel($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->cancel($taskID);
            if(dao::isError()) die(js::error(dao::getError()));

            if($this->post->comment != '' or !empty($changes))
            {
                $actionID = $this->action->create('task', $taskID, 'Canceled', $this->post->comment);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->cancel;
        $this->view->position[] = $this->lang->task->cancel;
        $this->view->users      = $this->loadModel('user')->getPairs('noletter'); 
        
        $this->display();
    }

    /**
     * Activate a task.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function activate($taskID)
    {
        $this->commonAction($taskID);

        if(!empty($_POST))
        {
            $this->loadModel('action');
            $changes = $this->task->activate($taskID);
            if(dao::isError()) die(js::error(dao::getError()));

            if($this->post->comment != '' or !empty($changes))
            {
                $actionID = $this->action->create('task', $taskID, 'Activated', $this->post->comment);
                $this->action->logHistory($actionID, $changes);
                $this->sendmail($taskID, $actionID);
            }
            if(isonlybody()) die(js::closeModal('parent.parent', 'this'));
            die(js::locate($this->createLink('task', 'view', "taskID=$taskID"), 'parent'));
        }

        if(!isset($this->view->members[$this->view->task->finishedBy])) $this->view->members[$this->view->task->finishedBy] = $this->view->task->finishedBy;
        $this->view->title      = $this->view->project->name . $this->lang->colon .$this->lang->task->activate;
        $this->view->position[] = $this->lang->task->activate;
        $this->view->users      = $this->loadModel('user')->getPairs('noletter'); 
        $this->display();
    }

    /**
     * Delete a task.
     * 
     * @param  int    $projectID 
     * @param  int    $taskID 
     * @param  string $confirm yes|no
     * @access public
     * @return void
     */
    public function delete($projectID, $taskID, $confirm = 'no')
    {
        $task = $this->task->getById($taskID);
        if($confirm == 'no')
        {
            die(js::confirm($this->lang->task->confirmDelete, inlink('delete', "projectID=$projectID&taskID=$taskID&confirm=yes")));
        }
        else
        {
            $story = $this->dao->select('story')->from(TABLE_TASK)->where('id')->eq($taskID)->fetch('story');
            $this->task->delete(TABLE_TASK, $taskID);
            if($task->fromBug != 0) $this->dao->update(TABLE_BUG)->set('toTask')->eq(0)->where('id')->eq($task->fromBug)->exec();
            if($story) $this->loadModel('story')->setStage($story);
            die(js::locate($this->session->taskList, 'parent'));
        }
    }

    /**
     * Send email.
     * 
     * @param  int    $taskID 
     * @param  int    $actionID 
     * @access public
     * @return void
     */
    public function sendmail($taskID, $actionID)
    {
        /* Reset $this->output. */
        $this->clear();

        /* Set toList and ccList. */
        $task        = $this->task->getById($taskID);
        $projectName = $this->project->getById($task->project)->name;
        $users       = $this->loadModel('user')->getPairs('noletter');
        $toList      = $task->assignedTo;
        $ccList      = trim($task->mailto, ',');

        if($toList == '')
        {
            if($ccList == '') return;
            if(strpos($ccList, ',') === false)
            {
                $toList = $ccList;
                $ccList = '';
            }
            else
            {
                $commaPos = strpos($ccList, ',');
                $toList = substr($ccList, 0, $commaPos);
                $ccList = substr($ccList, $commaPos + 1);
            }
        }
        elseif(strtolower($toList) == 'closed')
        {
            $toList = $task->finishedBy;
        }

        /* Get action info. */
        $action          = $this->loadModel('action')->getById($actionID);
        $history         = $this->action->getHistory($actionID);
        $action->history = isset($history[$actionID]) ? $history[$actionID] : array();

        /* Create the email content. */
        $this->view->task   = $task;
        $this->view->action = $action;
        $this->view->users  = $users;

        $mailContent = $this->parse($this->moduleName, 'sendmail');

        /* Send emails. */
        $this->loadModel('mail')->send($toList, 'TASK#' . $task->id . ' ' . $task->name . ' - ' . $projectName, $mailContent, $ccList);
        if($this->mail->isError()) trigger_error(join("\n", $this->mail->getError()));
    }
    
    /**
     * AJAX: return tasks of a user in html select. 
     * 
     * @param  string $account 
     * @param  string $id 
     * @param  string $status 
     * @access public
     * @return string
     */
    public function ajaxGetUserTasks($account = '', $id = '', $status = 'wait,doing')
    {
        if($account == '') $account = $this->app->user->account;
        $tasks = $this->task->getUserTaskPairs($account, $status);

        if($id) die(html::select("tasks[$id]", $tasks, '', 'class="form-control"'));
        die(html::select('task', $tasks, '', 'class=form-control'));
    }

    /**
     * AJAX: return project tasks in html select.
     * 
     * @param  int    $projectID 
     * @param  int    $taskID 
     * @access public
     * @return string
     */
    public function ajaxGetProjectTasks($projectID, $taskID = 0)
    {
        $tasks = $this->task->getProjectTaskPairs((int)$projectID);
        die(html::select('task', empty($tasks) ? array('' => '') : $tasks, $taskID));
    }

    /**
     * AJAX: get the actions of a task. for web app.
     * 
     * @param  int    $taskID 
     * @access public
     * @return void
     */
    public function ajaxGetDetail($taskID)
    {
        $this->view->actions = $this->loadModel('action')->getList('task', $taskID);
        $this->display();
    }

    /**
     * The report page.
     * 
     * @param  int    $projectID 
     * @param  string $browseType 
     * @access public
     * @return void
     */
    public function report($projectID, $browseType = 'all')
    {
        
        $this->loadModel('report');
        $this->view->charts   = array();

        if(!empty($_POST))
        {
            foreach($this->post->charts as $chart)
            {
                $chartFunc   = 'getDataOf' . $chart;
                $chartData   = $this->task->$chartFunc();
                $chartOption = $this->lang->task->report->$chart;
                $this->task->mergeChartOption($chart);

                $this->view->charts[$chart] = $chartOption;
                $this->view->datas[$chart]  = $this->report->computePercent($chartData);
            }
        }

        $this->project->setMenu($this->project->getPairs(), $projectID);
        $this->projects            = $this->project->getPairs();
        $this->view->title         = $this->projects[$projectID] . $this->lang->colon . $this->lang->task->report->common;
        $this->view->position[]    = $this->projects[$projectID];
        $this->view->position[]    = $this->lang->task->report->common;
        $this->view->projectID     = $projectID;
        $this->view->browseType    = $browseType;
        $this->view->checkedCharts = $this->post->charts ? join(',', $this->post->charts) : '';

        $this->display();
    }

    /**
     * get data to export
     * 
     * @param  int $projectID 
     * @param  string $orderBy 
     * @access public
     * @return void
     */
    public function export($projectID, $orderBy)
    {
        if($_POST)
        {
            $taskLang   = $this->lang->task;
            $taskConfig = $this->config->task;

            /* Create field lists. */
            $fields = explode(',', $taskConfig->exportFields);
            foreach($fields as $key => $fieldName)
            {
                $fieldName = trim($fieldName);
                $fields[$fieldName] = isset($taskLang->$fieldName) ? $taskLang->$fieldName : $fieldName;
                unset($fields[$key]);
            }

            /* Get tasks. */
            $tasks = $this->dao->select('*')->from(TABLE_TASK)->alias('t1')->where($this->session->taskQueryCondition)
                ->beginIF($this->post->exportType == 'selected')->andWhere('t1.id')->in($this->cookie->checkedItem)->fi()
                ->orderBy($orderBy)->fetchAll('id');

            /* Get users and projects. */
            $users    = $this->loadModel('user')->getPairs('noletter');
            $projects = $this->loadModel('project')->getPairs('all|nocode');

            /* Get related objects id lists. */
            $relatedStoryIdList  = array();
            foreach($tasks as $task) $relatedStoryIdList[$task->story] = $task->story;

            /* Get related objects title or names. */
            $relatedStories = $this->dao->select('id,title')->from(TABLE_STORY) ->where('id')->in($relatedStoryIdList)->fetchPairs();
            $relatedFiles   = $this->dao->select('id, objectID, pathname, title')->from(TABLE_FILE)->where('objectType')->eq('task')->andWhere('objectID')->in(@array_keys($tasks))->fetchGroup('objectID');
            $relatedModules = $this->loadModel('tree')->getTaskOptionMenu($projectID);

            foreach($tasks as $task)
            {
                if($this->post->fileType == 'csv')
                {
                    $task->desc = htmlspecialchars_decode($task->desc);
                    $task->desc = str_replace("<br />", "\n", $task->desc);
                    $task->desc = str_replace('"', '""', $task->desc);
                }

                /* fill some field with useful value. */
                $task->story = isset($relatedStories[$task->story]) ? $relatedStories[$task->story] . "(#$task->story)" : '';

                if(isset($projects[$task->project]))                  $task->project      = $projects[$task->project] . "(#$task->project)";
                if(isset($taskLang->typeList[$task->type]))           $task->type         = $taskLang->typeList[$task->type];
                if(isset($taskLang->priList[$task->pri]))             $task->pri          = $taskLang->priList[$task->pri];
                if(isset($taskLang->statusList[$task->status]))       $task->status       = $taskLang->statusList[$task->status];
                if(isset($taskLang->reasonList[$task->closedReason])) $task->closedReason = $taskLang->reasonList[$task->closedReason];
                if(isset($relatedModules[$task->module]))             $task->module       = $relatedModules[$task->module] . "(#$task->module)";

                if(isset($users[$task->openedBy]))     $task->openedBy     = $users[$task->openedBy];
                if(isset($users[$task->assignedTo]))   $task->assignedTo   = $users[$task->assignedTo];
                if(isset($users[$task->finishedBy]))   $task->finishedBy   = $users[$task->finishedBy];
                if(isset($users[$task->canceledBy]))   $task->canceledBy   = $users[$task->canceledBy];
                if(isset($users[$task->closedBy]))     $task->closedBy     = $users[$task->closedBy];
                if(isset($users[$task->lastEditedBy])) $task->lastEditedBy = $users[$task->lastEditedBy];

                $task->openedDate     = substr($task->openedDate,     0, 10);
                $task->assignedDate   = substr($task->assignedDate,   0, 10);
                $task->finishedDate   = substr($task->finishedDate,   0, 10);
                $task->canceledDate   = substr($task->canceledDate,   0, 10);
                $task->closedDate     = substr($task->closedDate,     0, 10);
                $task->lastEditedDate = substr($task->lastEditedDate, 0, 10);

                /* Set related files. */
                if(isset($relatedFiles[$task->id]))
                {
                    $task->files = '';
                    foreach($relatedFiles[$task->id] as $file)
                    {
                        $fileURL = 'http://' . $this->server->http_host . $this->config->webRoot . "data/upload/{$this->app->company->id}/" . $file->pathname;
                        $task->files .= html::a($fileURL, $file->title, '_blank') . '<br />';
                    }
                }
            }

            $this->post->set('fields', $fields);
            $this->post->set('rows', $tasks);
            $this->post->set('kind', 'task');
            $this->fetch('file', 'export2' . $this->post->fileType, $_POST);
        }

        $this->display();
    }
}