<?php

namespace Kanboard\Plugin\OrganonTweaks\Controller;

use Kanboard\Controller\BaseController;
use Kanboard\Core\Controller\AccessForbiddenException;
use Kanboard\Model\TaskModel;

/**
 * Remove an empty board column straight from its header menu.
 */
class ColumnController extends BaseController
{
    /**
     * Confirmation dialog.
     */
    public function confirm()
    {
        $project = $this->getProject();
        $column_id = $this->request->getIntegerParam('column_id');
        $this->checkAccess($project['id'], $column_id);

        $this->response->html($this->template->render('organonTweaks:board/remove_column', array(
            'project' => $project,
            'column' => $this->columnModel->getColumnTitleById($column_id),
            'column_id' => $column_id,
        )));
    }

    /**
     * Remove the column and return to the board.
     */
    public function remove()
    {
        $project = $this->getProject();
        $values = $this->request->getValues();
        $column_id = isset($values['column_id']) ? (int) $values['column_id'] : 0;

        $this->checkAccess($project['id'], $column_id);

        if ($this->columnModel->remove($column_id)) {
            $this->flash->success(t('Column removed successfully.'));
        } else {
            $this->flash->failure(t('Unable to remove this column.'));
        }

        $this->response->redirect($this->helper->url->to('BoardViewController', 'show', array('project_id' => $project['id'])));
    }

    /**
     * Allow only users who can manage columns, and only for a column with no tasks at all
     * (open or closed) -- ColumnModel::remove() is a bare delete, so a non-empty column
     * would orphan its tasks.
     */
    private function checkAccess($project_id, $column_id)
    {
        if (! $this->helper->user->hasProjectAccess('ColumnController', 'remove', $project_id)) {
            throw new AccessForbiddenException();
        }

        $count = $this->taskFinderModel->countByColumnId(
            $project_id,
            $column_id,
            array(TaskModel::STATUS_OPEN, TaskModel::STATUS_CLOSED)
        );

        if ($count > 0) {
            throw new AccessForbiddenException();
        }
    }
}