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Current Path : /home/vmanager/www/vendor/yiisoft/yii2-bootstrap4/src/
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Current File : /home/vmanager/www/vendor/yiisoft/yii2-bootstrap4/src/Breadcrumbs.php
<?php
/**
 * @link https://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license https://www.yiiframework.com/license/
 */

namespace yii\bootstrap4;

use Yii;
use yii\base\InvalidConfigException;
use yii\helpers\ArrayHelper;

/**
 * Breadcrumbs represents a bootstrap 4 version of [[\yii\widgets\Breadcrumbs]]. It displays
 * a list of links indicating the position of the current page in the whole site hierarchy.
 *
 * To use Breadcrumbs, you need to configure its [[links]] property, which specifies the links to be displayed. For example,
 *
 * ```php
 * echo Breadcrumbs::widget([
 *     'links' => isset($this->params['breadcrumbs']) ? $this->params['breadcrumbs'] : [],
 *     'options' => [],
 * ]);
 * ```
 * @see https://getbootstrap.com/docs/4.5/components/breadcrumb/
 * @author Alexandr Kozhevnikov <onmotion1@gmail.com>
 * @author Simon Karlen <simi.albi@outlook.com>
 */
class Breadcrumbs extends Widget
{
    /**
     * @var string the name of the breadcrumb container tag.
     */
    public $tag = 'ol';
    /**
     * @var bool whether to HTML-encode the link labels.
     */
    public $encodeLabels = true;
    /**
     * @var array the first hyperlink in the breadcrumbs (called home link).
     * Please refer to [[links]] on the format of the link.
     * If this property is not set, it will default to a link pointing to [[\yii\web\Application::homeUrl]]
     * with the label 'Home'. If this property is false, the home link will not be rendered.
     */
    public $homeLink;
    /**
     * @var array list of links to appear in the breadcrumbs. If this property is empty,
     * the widget will not render anything. Each array element represents a single link in the breadcrumbs
     * with the following structure:
     *
     * ```php
     * [
     *     'label' => 'label of the link',  // required
     *     'url' => 'url of the link',      // optional, will be processed by Url::to()
     *     'template' => 'own template of the item', // optional, if not set $this->itemTemplate will be used
     * ]
     * ```
     *
     *
     */
    public $links = [];
    /**
     * @var string the template used to render each inactive item in the breadcrumbs. The token `{link}`
     * will be replaced with the actual HTML link for each inactive item.
     */
    public $itemTemplate = "<li class=\"breadcrumb-item\">{link}</li>\n";
    /**
     * @var string the template used to render each active item in the breadcrumbs. The token `{link}`
     * will be replaced with the actual HTML link for each active item.
     */
    public $activeItemTemplate = "<li class=\"breadcrumb-item active\" aria-current=\"page\">{link}</li>\n";
    /**
     * @var array the HTML attributes for the widgets nav container tag.
     * @see \yii\helpers\Html::renderTagAttributes() for details on how attributes are being rendered.
     */
    public $navOptions = ['aria-label' => 'breadcrumb'];


    /**
     * Initializes the widget.
     * If you override this method, make sure you call the parent implementation first.
     */
    public function init()
    {
        parent::init();
        $this->clientOptions = false;
        Html::addCssClass($this->options, ['widget' => 'breadcrumb']);
    }

    /**
     * Renders the widget.
     * @throws InvalidConfigException
     */
    public function run()
    {
        $this->registerPlugin('breadcrumb');

        if (empty($this->links)) {
            return '';
        }
        $links = [];
        if ($this->homeLink === null) {
            $links[] = $this->renderItem([
                'label' => Yii::t('yii', 'Home'),
                'url' => Yii::$app->homeUrl,
            ], $this->itemTemplate);
        } elseif ($this->homeLink !== false) {
            $links[] = $this->renderItem($this->homeLink, $this->itemTemplate);
        }
        foreach ($this->links as $link) {
            if (!is_array($link)) {
                $link = ['label' => $link];
            }
            $links[] = $this->renderItem($link, isset($link['url']) ? $this->itemTemplate : $this->activeItemTemplate);
        }
        return Html::tag('nav', Html::tag($this->tag, implode('', $links), $this->options), $this->navOptions);
    }

    /**
     * Renders a single breadcrumb item.
     * @param array $link the link to be rendered. It must contain the "label" element. The "url" element is optional.
     * @param string $template the template to be used to rendered the link. The token "{link}" will be replaced by the link.
     * @return string the rendering result
     * @throws InvalidConfigException if `$link` does not have "label" element.
     */
    protected function renderItem($link, $template)
    {
        $encodeLabel = ArrayHelper::remove($link, 'encode', $this->encodeLabels);
        if (array_key_exists('label', $link)) {
            $label = $encodeLabel ? Html::encode($link['label']) : $link['label'];
        } else {
            throw new InvalidConfigException('The "label" element is required for each link.');
        }
        if (isset($link['template'])) {
            $template = $link['template'];
        }
        if (isset($link['url'])) {
            $options = $link;
            unset($options['template'], $options['label'], $options['url']);
            $link = Html::a($label, $link['url'], $options);
        } else {
            $link = $label;
        }

        return strtr($template, ['{link}' => $link]);
    }
}
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