DropdownLink.php

<?php

declare(strict_types=1);

/**
 * This file is part of the EaseTWBootstrap4 package
 *
 * https://github.com/VitexSoftware/php-ease-twbootstrap4
 *
 * (c) Vítězslav Dvořák <http://vitexsoftware.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Ease\TWB4;

/**
 * Description of Dropdown.
 *
 * @author Vítězslav Dvořák <info@vitexsoftware.cz>
 */
class DropdownLink extends \Ease\Html\DivTag
{
    private \Ease\Html\DivTag $dropdownMenu;

    /**
     * Dropdown menu.
     *
     * @param string $heading
     * @param string $type    one of primary|secondary|success|danger|warning|info|light|dark|link
     * @param array  $items
     */
    public function __construct(
        $heading,
        $type = 'link',
        $items = [],
        array $properties = [],
    ) {
        $properties['class'] = 'dropdown';
        $handle = $this->handle($heading, $type);
        parent::__construct($handle, $properties);

        $this->dropdownMenu = new \Ease\Html\DivTag(
            null,
            ['class' => 'dropdown-menu', 'aria-labelledby' => $handle->getTagID()],
        );

        if (!empty($items)) {
            foreach ($items as $url => $label) {
                $this->addDropdownItem($label, $url);
            }
        }
    }

    /**
     * Dropdown handle.
     *
     * @param string $heading
     * @param string $type    one of primary|secondary|success|danger|warning|info|light|dark|link
     *
     * @return \Ease\Html\ATag
     */
    public function handle($heading, $type)
    {
        $handle = new \Ease\Html\ATag(
            '#',
            $heading,
            ['class' => 'nav-link '.$type.' dropdown-toggle', 'type' => 'button',
                'data-toggle' => 'dropdown', 'role' => 'button', 'aria-haspopup' => 'true',
                'aria-expanded' => 'false'],
        );
        $handle->setTagID($heading);

        return $handle;
    }

    /**
     * add one dropdown item.
     *
     * @param string $label or empty for divider
     * @param string $url
     */
    public function addDropdownItem($label, $url): void
    {
        if (empty($label)) {
            $this->dropdownMenu->addItem(new \Ease\Html\DivTag(
                null,
                ['class' => 'dropdown-divider'],
            ));
        } else {
            $this->dropdownMenu->addItem(new \Ease\Html\ATag(
                $url,
                $label,
                ['class' => 'dropdown-item'],
            ));
        }
    }

    public function finalize(): void
    {
        $this->addItem($this->dropdownMenu);
        parent::finalize();
    }
}