RenderAttachedTestController.php

<?php

namespace Drupal\render_attached_test\Controller;


/**
 * Controller for various permutations of #attached in the render array.
 */
class RenderAttachedTestController {
    
    /**
     * Tests special header and status code rendering.
     *
     * @return array
     *   A render array using features of the 'http_header' directive.
     */
    public function teapotHeaderStatus() {
        $render = [];
        $render['#attached']['http_header'][] = [
            'Status',
            418,
        ];
        return $render;
    }
    
    /**
     * Tests attached HTML head rendering.
     *
     * @return array
     *   A render array using the 'http_head' directive.
     */
    public function header() {
        $render = [];
        $render['#attached']['http_header'][] = [
            'X-Test-Teapot-Replace',
            'This value gets replaced',
        ];
        $render['#attached']['http_header'][] = [
            'X-Test-Teapot-Replace',
            'Teapot replaced',
            TRUE,
        ];
        $render['#attached']['http_header'][] = [
            'X-Test-Teapot-No-Replace',
            'This value is not replaced',
        ];
        $render['#attached']['http_header'][] = [
            'X-Test-Teapot-No-Replace',
            'This one is added',
            FALSE,
        ];
        $render['#attached']['http_header'][] = [
            'X-Test-Teapot',
            'Teapot Mode Active',
        ];
        return $render;
    }
    
    /**
     * Tests attached HTML head rendering.
     *
     * @return array
     *   A render array using the 'html_head' directive.
     */
    public function head() {
        $head = [
            [
                '#tag' => 'meta',
                '#attributes' => [
                    'test-attribute' => 'testvalue',
                ],
            ],
            'test_head_attribute',
        ];
        $render = [];
        $render['#attached']['html_head'][] = $head;
        return $render;
    }
    
    /**
     * Tests attached feed rendering.
     *
     * @return array
     *   A render array using the 'feed' directive.
     */
    public function feed() {
        $render = [];
        $render['#attached']['feed'][] = [
            'test://url',
            'Your RSS feed.',
        ];
        return $render;
    }
    
    /**
     * Tests HTTP header rendering for link.
     *
     * @return array
     *   A render array using the 'html_head_link' directive.
     */
    public function htmlHeaderLink() {
        $render = [];
        $render['#attached']['html_head_link'][] = [
            [
                'href' => '/foo?bar=<baz>&baz=false',
                'rel' => 'alternate',
            ],
            TRUE,
        ];
        $render['#attached']['html_head_link'][] = [
            [
                'href' => '/not-added-to-http-headers',
                'rel' => 'alternate',
            ],
            FALSE,
        ];
        $render['#attached']['html_head_link'][] = [
            [
                'href' => '/foo/bar',
                'hreflang' => 'nl',
                'rel' => 'alternate',
            ],
            TRUE,
        ];
        $render['#attached']['html_head_link'][] = [
            [
                'href' => '/foo/bar',
                'hreflang' => 'de',
                'rel' => 'alternate',
            ],
            TRUE,
        ];
        return $render;
    }

}