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<?php

namespace Roots\Soil\Modules;

use function add_action;
use function apply_filters;
use function is_feed;
use function network_home_url;
use function remove_filter;
use function Roots\Soil\compare_base_url;
use function wp_make_link_relative;

/**
 * Relative URLs Module
 *
 * WordPress likes to use absolute URLs on everything - let's clean that up.
 * Inspired by {@link http://www.456bereastreet.com/archive/201010/how_to_make_wordpress_urls_root_relative/}
 */
class RelativeUrlsModule extends AbstractModule
{
    /**
     * Name of the module.
     *
     * @var string
     */
    protected $name = 'relative-urls';

/**
     * Condition under which the module is loaded.
     *
     * By default, modules are disabled in admin panel.
     *
     * @return bool
     */
    protected function condition()
    {
        return parent::condition()
            && !isset($_GET['sitemap']) // phpcs:ignore WordPress.Security.NonceVerification.Recommended
            && !in_array($GLOBALS['pagenow'], ['wp-login.php', 'wp-register.php'], true);
    }

/**
     * Module handle.
     *
     * @return void
     */
    public function handle()
    {
        $this->filters($this->urlFilters(), 'relativeUrl');
        $this->filter('wp_calculate_image_srcset', 'imageSrcset');

$this->compat();
    }

/**
     * Convert an absolute URL to a relative URL.
     *
     * @internal Used by {@see self::urlFilters several filters}
     *
     * @param string $url
     * @return string
     */
    public function relativeUrl($url)
    {
        if (is_feed()) {
            return $url;
        }

if (compare_base_url(network_home_url(), $url)) {
            return wp_make_link_relative($url);
        }

return $url;
    }

/**
     * Convert multiple URL sources to relative URLs
     *
     * @internal Used by `wp_calculate_image_srcset`
     * @param string[] $sources
     * @return string[]
     */
    public function imageSrcset($sources)
    {
        if (!is_array($sources)) {
            return $sources;
        }

return array_map(function ($source) {
            $source['url'] = $this->relativeUrl($source['url']);

return $source;
        }, $sources);
    }

/**
     * List of URL hooks to be filtered by this module
     *
     * @return string[]
     */
    protected function urlFilters()
    {
        return apply_filters('soil/relative-url-filters', [
            'bloginfo_url',
            'the_permalink',
            'wp_list_pages',
            'wp_list_categories',
            'wp_get_attachment_url',
            'the_content_more_link',
            'the_tags',
            'get_pagenum_link',
            'get_comment_link',
            'month_link',
            'day_link',
            'year_link',
            'term_link',
            'the_author_posts_link',
            'script_loader_src',
            'style_loader_src',
            'theme_file_uri',
            'parent_theme_file_uri',
        ]);
    }

/**
     * Add compatibility with third-party plugins.
     *
     * @return void
     */
    protected function compat()
    {
        $this->compatSeoFramework();
    }

/**
     * Add The SEO Framework compatibility.
     *
     * @return void
     */
    protected function compatSeoFramework()
    {
        add_action('the_seo_framework_do_before_output', function () {
            remove_filter('wp_get_attachment_url', [$this, 'relativeUrl']);
        });

add_action('the_seo_framework_do_after_output', function () {
            $this->filter('wp_get_attachment_url', 'relativeUrl');
        });
    }
}