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<?php
namespace Kanboard\Model;
use Kanboard\Event\TaskEvent;
/**
* Task Position
*
* @package model
* @author Frederic Guillot
*/
class TaskPosition extends Base
{
/**
* Move a task to another column or to another position
*
* @access public
* @param integer $project_id Project id
* @param integer $task_id Task id
* @param integer $column_id Column id
* @param integer $position Position (must be >= 1)
* @param integer $swimlane_id Swimlane id
* @param boolean $fire_events Fire events
* @return boolean
*/
public function movePosition($project_id, $task_id, $column_id, $position, $swimlane_id = 0, $fire_events = true)
{
$result = false;
if ($position < 1) {
return $result;
}
$task = $this->taskFinder->getById($task_id);
if ($task['is_active'] == Task::STATUS_CLOSED) {
return true;
}
$this->db->startTransaction();
if ($task['swimlane_id'] != $swimlane_id || $task['column_id'] != $column_id) {
$result = $this->moveTaskToAnotherColumn($task, $swimlane_id, $column_id, $position);
} elseif ($task['position'] != $position) {
$result = $this->moveTaskWithinSameColumn($task, $position);
}
if (! $result) {
$this->db->cancelTransaction();
return false;
}
$this->db->closeTransaction();
if ($fire_events) {
$this->fireEvents($task, $column_id, $position, $swimlane_id);
}
return $result;
}
/**
* Move a task to another column/swimlane
*
* @access private
* @param array $task
* @param integer $swimlane_id
* @param integer $column_id
* @param integer $position
* @return boolean
*/
private function moveTaskToAnotherColumn(array $task, $swimlane_id, $column_id, $position)
{
$results = array();
$max = $this->getQuery($task['project_id'], $swimlane_id, $column_id)->count();
$position = $max > 0 && $position > $max ? $max + 1 : $position;
$results[] = $this->getQuery($task['project_id'], $task['swimlane_id'], $task['column_id'])->gt('position', $task['position'])->decrement('position', 1);
$results[] = $this->getQuery($task['project_id'], $swimlane_id, $column_id)->gte('position', $position)->increment('position', 1);
$results[] = $this->updateTaskPosition($task['id'], $swimlane_id, $column_id, $position);
return !in_array(false, $results, true);
}
/**
* Move a task within the same column
*
* @access private
* @param array $task
* @param integer $position
* @return boolean
*/
private function moveTaskWithinSameColumn(array $task, $position)
{
$results = array();
$max = $this->getQuery($task['project_id'], $task['swimlane_id'], $task['column_id'])->count();
$position = $max > 0 && $position > $max ? $max : $position;
if ($position >= $max) {
$results[] = $this->getQuery($task['project_id'], $task['swimlane_id'], $task['column_id'])->lte('position', $position)->decrement('position', 1);
} else {
$results[] = $this->getQuery($task['project_id'], $task['swimlane_id'], $task['column_id'])->gte('position', $position)->increment('position', 1);
}
$results[] = $this->updateTaskPosition($task['id'], $task['swimlane_id'], $task['column_id'], $position);
return !in_array(false, $results, true);
}
/**
* Update final task position
*
* @access private
* @param integer $task_id
* @param integer $swimlane_id
* @param integer $column_id
* @param integer $position
* @return boolean
*/
private function updateTaskPosition($task_id, $swimlane_id, $column_id, $position)
{
$now = time();
return $this->db->table(Task::TABLE)
->eq('id', $task_id)
->eq('is_active', 1)
->update(array(
'position' => $position,
'column_id' => $column_id,
'swimlane_id' => $swimlane_id,
'date_modification' => $now,
'date_moved' => $now,
));
}
/**
* Get common query
*
* @access private
* @param integer $project_id
* @param integer $swimlane_id
* @param integer $column_id
* @return \PicoDb\Table
*/
private function getQuery($project_id, $swimlane_id, $column_id)
{
return $this->db->table(Task::TABLE)
->eq('project_id', $project_id)
->eq('swimlane_id', $swimlane_id)
->eq('column_id', $column_id)
->eq('is_active', 1);
}
/**
* Fire events
*
* @access private
* @param array $task
* @param integer $new_column_id
* @param integer $new_position
* @param integer $new_swimlane_id
*/
private function fireEvents(array $task, $new_column_id, $new_position, $new_swimlane_id)
{
$event_data = array(
'task_id' => $task['id'],
'project_id' => $task['project_id'],
'position' => $new_position,
'column_id' => $new_column_id,
'swimlane_id' => $new_swimlane_id,
'src_column_id' => $task['column_id'],
'dst_column_id' => $new_column_id,
'date_moved' => $task['date_moved'],
'recurrence_status' => $task['recurrence_status'],
'recurrence_trigger' => $task['recurrence_trigger'],
);
if ($task['swimlane_id'] != $new_swimlane_id) {
$this->logger->debug('Event fired: '.Task::EVENT_MOVE_SWIMLANE);
$this->dispatcher->dispatch(Task::EVENT_MOVE_SWIMLANE, new TaskEvent($event_data));
} elseif ($task['column_id'] != $new_column_id) {
$this->logger->debug('Event fired: '.Task::EVENT_MOVE_COLUMN);
$this->dispatcher->dispatch(Task::EVENT_MOVE_COLUMN, new TaskEvent($event_data));
} elseif ($task['position'] != $new_position) {
$this->logger->debug('Event fired: '.Task::EVENT_MOVE_POSITION);
$this->dispatcher->dispatch(Task::EVENT_MOVE_POSITION, new TaskEvent($event_data));
}
}
}
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