<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

namespace ExpressionEngine\Model\Content\Display;

use ExpressionEngine\Model\Content\Display\LayoutDisplay;
use ExpressionEngine\Model\Content\Display\LayoutTab;

/**
 * Content Default Layout
 */
class DefaultLayout implements LayoutInterface
{
    protected $layout;
    protected $assigned = array();

    public function __construct()
    {
        $this->layout = $this->createLayout();
    }

    /**
     * Create the basic layout structure. Here you can add
     * tabs, fields, etc.
     */
    protected function createLayout()
    {
        return array(array(
            'id' => 'main',
            'name' => 'Main',
            'fields' => array()
        ));
    }

    /**
     * There must be a single tab that accepts unassigned field
     * by default.
     */
    public function getDefaultTab()
    {
        return 'main';
    }

    /**
     * Fetch the layout array
     */
    public function getLayout()
    {
        return $this->layout;
    }

    /**
     * Transform a field array into a LayoutDisplay object
     */
    public function transform(array $fields)
    {
        $display = new LayoutDisplay();

        // add the tabs they wanted
        foreach ($this->layout as $section) {
            $tab = new LayoutTab($section['id'], $section['name']);

            foreach ($section['fields'] as $field) {
                $field_id = $field['field'];
                $tab->addField($fields[$field_id]);
                unset($fields[$field_id]);
            }

            $display->addTab($tab);
        }

        // add any leftover fields to the default tab
        $tab = $display->getTab($this->getDefaultTab());

        foreach ($fields as $field_id => $field) {
            $tab->addField($field);
        }

        return $display;
    }
}
