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<?php
namespace Model;
use 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)
{
$original_task = $this->taskFinder->getById($task_id);
$result = $this->calculateAndSave($project_id, $task_id, $column_id, $position, $swimlane_id);
if ($result) {
if ($original_task['swimlane_id'] != $swimlane_id) {
$this->calculateAndSave($project_id, 0, $column_id, 1, $original_task['swimlane_id']);
}
if ($fire_events) {
$this->fireEvents($original_task, $column_id, $position, $swimlane_id);
}
if ($original_task['column_id'] != $column_id
&& $column_id == $this->board->getLastColumnPosition($project_id)
&& $original_task['recurrence_status'] == Task::RECURE_STATUS_PENDING
&& $original_task['recurrence_trigger'] == Task::RECURE_TRIGGER_MOVE)
{
$this->taskDuplication->createRecurrence($task_id);
}
}
return $result;
}
/**
* Calculate the new position of all tasks
*
* @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 $swimlane_id Swimlane id
* @return array|boolean
*/
public function calculatePositions($project_id, $task_id, $column_id, $position, $swimlane_id = 0)
{
// The position can't be lower than 1
if ($position < 1) {
return false;
}
$board = $this->db->table(Board::TABLE)->eq('project_id', $project_id)->asc('position')->findAllByColumn('id');
$columns = array();
// For each column fetch all tasks ordered by position
foreach ($board as $board_column_id) {
$columns[$board_column_id] = $this->db->table(Task::TABLE)
->eq('is_active', 1)
->eq('swimlane_id', $swimlane_id)
->eq('project_id', $project_id)
->eq('column_id', $board_column_id)
->neq('id', $task_id)
->asc('position')
->asc('id') // Fix Postgresql unit test
->findAllByColumn('id');
}
// The column must exists
if (! isset($columns[$column_id])) {
return false;
}
// We put our task to the new position
if ($task_id) {
array_splice($columns[$column_id], $position - 1, 0, $task_id);
}
return $columns;
}
/**
* Save task positions
*
* @access private
* @param array $columns Sorted tasks
* @param integer $swimlane_id Swimlane id
* @return boolean
*/
private function savePositions(array $columns, $swimlane_id)
{
return $this->db->transaction(function ($db) use ($columns, $swimlane_id) {
foreach ($columns as $column_id => $column) {
$position = 1;
foreach ($column as $task_id) {
$result = $db->table(Task::TABLE)->eq('id', $task_id)->update(array(
'position' => $position,
'column_id' => $column_id,
'swimlane_id' => $swimlane_id,
));
if (! $result) {
return false;
}
$position++;
}
}
});
}
/**
* 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' => $task['date_moved'],
);
if ($task['swimlane_id'] != $new_swimlane_id) {
$this->container['dispatcher']->dispatch(Task::EVENT_MOVE_SWIMLANE, new TaskEvent($event_data));
}
else if ($task['column_id'] != $new_column_id) {
$this->container['dispatcher']->dispatch(Task::EVENT_MOVE_COLUMN, new TaskEvent($event_data));
}
else if ($task['position'] != $new_position) {
$this->container['dispatcher']->dispatch(Task::EVENT_MOVE_POSITION, new TaskEvent($event_data));
}
}
/**
* Calculate the new position of all tasks
*
* @access private
* @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 $swimlane_id Swimlane id
* @return boolean
*/
private function calculateAndSave($project_id, $task_id, $column_id, $position, $swimlane_id)
{
$positions = $this->calculatePositions($project_id, $task_id, $column_id, $position, $swimlane_id);
if ($positions === false || ! $this->savePositions($positions, $swimlane_id)) {
return false;
}
return true;
}
}
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