✏️ Editing: NoCategoryBase.php Writable

<?php
namespace SlimSEO;

class NoCategoryBase {
	protected $option_name = 'no_category_base';

public function setup(): void {
		add_action( 'created_category', [ $this, 'refresh_rewrite_rules' ] );
		add_action( 'delete_category', [ $this, 'refresh_rewrite_rules' ] );
		add_action( 'edited_category', [ $this, 'refresh_rewrite_rules' ] );
		add_action( 'init', [ $this, 'set_category_permastruct' ] );
		add_filter( 'category_rewrite_rules', [ $this, 'set_category_rewrite_rules' ] );
		add_filter( 'query_vars', [ $this, 'add_query_vars' ] );
		add_filter( 'request', [ $this, 'redirect' ] );

$this->activate();
	}

public function activate(): void {
		$option = get_option( 'slim_seo', [] );

if ( ! empty( $option[ $this->option_name ] ) ) {
			return;
		}

$option[ $this->option_name ] = 1;

update_option( 'slim_seo', $option );

$this->refresh_rewrite_rules();
	}

public function deactivate(): void {
		$option = get_option( 'slim_seo', [] );

if ( empty( $option[ $this->option_name ] ) ) {
			return;
		}

unset( $option[ $this->option_name ] );

update_option( 'slim_seo', $option );

$this->refresh_rewrite_rules();
	}

public function refresh_rewrite_rules(): void {
		global $wp_rewrite;

$wp_rewrite->flush_rules();
	}

public function set_category_permastruct(): void {
		global $wp_rewrite;

$wp_rewrite->extra_permastructs['category']['struct'] = '%category%';
	}

public function set_category_rewrite_rules( $category_rewrite ): array {
		global $wp_rewrite;

$category_rewrite = [];

if ( class_exists( 'Sitepress' ) ) {
			global $sitepress;

remove_filter( 'terms_clauses', [ $sitepress, 'terms_clauses' ] );

$categories = get_categories( [ 'hide_empty' => false ] );

add_filter( 'terms_clauses', [ $sitepress, 'terms_clauses' ], 10, 4 );
		} else {
			$categories = get_categories( [ 'hide_empty' => false ] );
		}

foreach ( $categories as $category ) {
			$category_nicename = $category->slug;

if ( $category->parent === $category->cat_ID ) {
				$category->parent = 0;
			} elseif ( 0 !== $category->parent ) {
				$category_nicename = get_category_parents( $category->parent, false, '/', true ) . $category_nicename;
			}

$category_rewrite[ "({$category_nicename})/(?:feed/)?(feed|rdf|rss|rss2|atom)/?$" ] = 'index.php?category_name=$matches[1]&feed=$matches[2]';

$category_rewrite[ "({$category_nicename})/{$wp_rewrite->pagination_base}/?([0-9]{1,})/?$" ] = 'index.php?category_name=$matches[1]&paged=$matches[2]';

$category_rewrite[ "({$category_nicename})/?$" ] = 'index.php?category_name=$matches[1]';
		}

$old_category_base = get_option( 'category_base' ) ? get_option( 'category_base' ) : 'category';
		$old_category_base = trim( $old_category_base, '/' );

$category_rewrite[ $old_category_base . '/(.*)$' ] = 'index.php?category_redirect=$matches[1]';

return $category_rewrite;
	}

public function add_query_vars( array $public_query_vars ): array {
		$public_query_vars[] = 'category_redirect';

return $public_query_vars;
	}

public function redirect( array $query_vars ) {
		if ( empty( $query_vars['category_redirect'] ) ) {
			return $query_vars;
		}

$cat_link = trailingslashit( get_option( 'home' ) ) . user_trailingslashit( $query_vars['category_redirect'], 'category' );
		wp_safe_redirect( $cat_link, 301, 'Slim SEO' );
		die;
	}
}

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