yiisoft / yii-bootstrap4

src/Dropdown.php

<?php

declare(strict_types=1);

namespace Yiisoft\Yii\Bootstrap4;

use JsonException;
use RuntimeException;
use Yiisoft\Arrays\ArrayHelper;
use Yiisoft\Html\Html;

use function array_key_exists;
use function array_merge;
use function array_merge_recursive;
use function is_string;

/**
 * Dropdown renders a Bootstrap dropdown menu component.
 *
 * For example,
 *
 * ```php
 * <div class="dropdown">
 *     <?php
 *         echo Dropdown::widget()
 *             ->items([
 *                 ['label' => 'DropdownA', 'url' => '/'],
 *                 ['label' => 'DropdownB', 'url' => '#'],
 *             ]);
 *     ?>
 * </div>
 * ```
 */
class Dropdown extends Widget
{
    private array $items = [];
    private bool $encodeLabels = true;
    private array $submenuOptions = [];
    private array $options = [];

    protected function run(): string
    {
        if (!isset($this->options['id'])) {
            $this->options['id'] = "{$this->getId()}-dropdown";
        }

        Html::addCssClass($this->options, ['widget' => 'dropdown-menu']);

        $this->registerClientEvents($this->options['id']);

        return $this->renderItems($this->items, $this->options);
    }

    /**
     * Renders menu items.
     *
     * @param array $items the menu items to be rendered
     * @param array $options the container HTML attributes
     *
     * @throws JsonException|RuntimeException if the label option is not specified in  one of the items.
     *
     * @return string the rendering result.
     */
    protected function renderItems(array $items, array $options = []): string
    {
        $lines = [];

        foreach ($items as $item) {
            if (is_string($item)) {
                $item = ['label' => $item, 'encode' => false, 'enclose' => false];
            }

            if (isset($item['visible']) && !$item['visible']) {
                continue;
            }

            if (!array_key_exists('label', $item)) {
                throw new RuntimeException('The "label" option is required.');
            }

            $encodeLabel = $item['encode'] ?? $this->encodeLabels;
            $label = $encodeLabel ? Html::encode($item['label']) : $item['label'];
            $itemOptions = ArrayHelper::getValue($item, 'options', []);
            $linkOptions = ArrayHelper::getValue($item, 'linkOptions', []);
            $active = ArrayHelper::getValue($item, 'active', false);
            $disabled = ArrayHelper::getValue($item, 'disabled', false);
            $enclose = ArrayHelper::getValue($item, 'enclose', true);

            Html::addCssClass($linkOptions, 'dropdown-item');

            if ($disabled) {
                ArrayHelper::setValue($linkOptions, 'tabindex', '-1');
                ArrayHelper::setValue($linkOptions, 'aria-disabled', 'true');
                Html::addCssClass($linkOptions, 'disabled');
            } elseif ($active) {
                Html::addCssClass($linkOptions, 'active');
            }

            $url = $item['url'] ?? null;

            if (empty($item['items'])) {
                if ($label === '-') {
                    $content = Html::div('', ['class' => 'dropdown-divider']);
                } elseif ($enclose === false) {
                    $content = $label;
                } elseif ($url === null) {
                    $content = Html::tag('h6', $label, ['class' => 'dropdown-header']);
                } else {
                    $content = Html::a($label, $url, $linkOptions);
                }

                $lines[] = $content;
            } else {
                $submenuOptions = $this->submenuOptions;

                if (isset($item['submenuOptions'])) {
                    $submenuOptions = array_merge($submenuOptions, $item['submenuOptions']);
                }

                Html::addCssClass($submenuOptions, ['dropdown-submenu']);
                Html::addCssClass($linkOptions, ['dropdown-toggle']);

                $lines[] = Html::beginTag(
                    'div',
                    array_merge_recursive(['class' => ['dropdown'], 'aria-expanded' => 'false'], $itemOptions)
                );

                $lines[] = Html::a($label, $url, array_merge([
                    'data-toggle' => 'dropdown',
                    'aria-haspopup' => 'true',
                    'aria-expanded' => 'false',
                    'role' => 'button',
                ], $linkOptions));

                $lines[] = self::widget()
                    ->items($item['items'])

The method items() does not exist on Yiisoft\Widget\Widget. It seems like you code against a sub-type of Yiisoft\Widget\Widget such as Yiisoft\Yii\Bootstrap4\Tabs or Yiisoft\Yii\Bootstrap4\Accordion or Yiisoft\Yii\Bootstrap4\Carousel or Yiisoft\Yii\Bootstrap4\Dropdown or Yiisoft\Yii\Bootstrap4\Nav.

                    ->options($submenuOptions)
                    ->submenuOptions($submenuOptions)
                    ->encodeLabels($this->encodeLabels)
                    ->run();
                $lines[] = Html::endTag('div');
            }
        }

        return Html::tag('div', implode("\n", $lines), $options);
    }

    /**
     * List of menu items in the dropdown. Each array element can be either an HTML string, or an array representing a
     * single menu with the following structure:
     *
     * - label: string, required, the label of the item link.
     * - encode: bool, optional, whether to HTML-encode item label.
     * - url: string|array, optional, the URL of the item link. This will be processed by {@see currentPath}.
     *   If not set, the item will be treated as a menu header when the item has no sub-menu.
     * - visible: bool, optional, whether this menu item is visible. Defaults to true.
     * - linkOptions: array, optional, the HTML attributes of the item link.
     * - options: array, optional, the HTML attributes of the item.
     * - items: array, optional, the submenu items. The structure is the same as this property.
     *   Note that Bootstrap doesn't support dropdown submenu. You have to add your own CSS styles to support it.
     * - submenuOptions: array, optional, the HTML attributes for sub-menu container tag. If specified it will be
     *   merged with {@see submenuOptions}.
     *
     * To insert divider use `-`.
     *
     * @param array $value
     *
     * @return $this
     */
    public function items(array $value): self
    {
        $this->items = $value;

        return $this;
    }

    /**
     * Whether the labels for header items should be HTML-encoded.
     *
     * @param bool $value
     *
     * @return $this
     */
    public function encodeLabels(bool $value): self
    {
        $this->encodeLabels = $value;

        return $this;
    }

    /**
     * The HTML attributes for sub-menu container tags.
     *
     * @param array $value
     *
     * @return $this
     */
    public function submenuOptions(array $value): self
    {
        $this->submenuOptions = $value;

        return $this;
    }

    /**
     * @param array $value the HTML attributes for the widget container tag. The following special options are
     * recognized.
     *
     * @return $this
     *
     * {@see \Yiisoft\Html\Html::renderTagAttributes()} for details on how attributes are being rendered.
     */
    public function options(array $value): self
    {
        $this->options = $value;

        return $this;
    }
}