Custom Post Type Permalink

// Register Custom Post Type
function custom_ourproducts_post_type() {
    $labels = array(
        'name'                  => _x( 'Our Products', 'Post Type General Name', 'text_domain' ),
        'singular_name'         => _x( 'Our Product', 'Post Type Singular Name', 'text_domain' ),
        'menu_name'             => __( 'Our Products', 'text_domain' ),
        'name_admin_bar'        => __( 'Our Product', 'text_domain' ),
        'archives'              => __( 'Our Product Archives', 'text_domain' ),
        'attributes'            => __( 'Our Product Attributes', 'text_domain' ),
        'parent_item_colon'     => __( 'Parent Product:', 'text_domain' ),
        'all_items'             => __( 'All Products', 'text_domain' ),
        'add_new_item'          => __( 'Add New Product', 'text_domain' ),
        'add_new'               => __( 'Add New', 'text_domain' ),
        'new_item'              => __( 'New Product', 'text_domain' ),
        'edit_item'             => __( 'Edit Product', 'text_domain' ),
        'update_item'           => __( 'Update Product', 'text_domain' ),
        'view_item'             => __( 'View Product', 'text_domain' ),
        'view_items'            => __( 'View Products', 'text_domain' ),
        'search_items'          => __( 'Search Product', 'text_domain' ),
        'not_found'             => __( 'Not found', 'text_domain' ),
        'not_found_in_trash'    => __( 'Not found in Trash', 'text_domain' ),
        'featured_image'        => __( 'Featured Image', 'text_domain' ),
        'set_featured_image'    => __( 'Set featured image', 'text_domain' ),
        'remove_featured_image' => __( 'Remove featured image', 'text_domain' ),
        'use_featured_image'    => __( 'Use as featured image', 'text_domain' ),
        'insert_into_item'      => __( 'Insert into product', 'text_domain' ),
        'uploaded_to_this_item' => __( 'Uploaded to this product', 'text_domain' ),
        'items_list'            => __( 'Products list', 'text_domain' ),
        'items_list_navigation' => __( 'Products list navigation', 'text_domain' ),
        'filter_items_list'     => __( 'Filter products list', 'text_domain' ),
    );
    $args = array(
        'label'                 => __( 'Our Product', 'text_domain' ),
        'description'           => __( 'Custom post type for our products', 'text_domain' ),
        'labels'                => $labels,
        'supports'              => array( 'title', 'editor', 'thumbnail' ),
        'taxonomies'            => array( 'product_category' ),
        'hierarchical'          => false,
        'public'                => true,
        'show_ui'               => true,
        'show_in_menu'          => true,
        'menu_position'         => 15,
        'menu_icon'             => 'dashicons-cart',
        'show_in_admin_bar'     => true,
        'show_in_nav_menus'     => true,
        'can_export'            => true,
        'has_archive'           => true,
        'exclude_from_search'   => false,
        'publicly_queryable'    => true,
        'capability_type'       => 'post',
        'rewrite' => array(
            'slug' => '%product_category%',
            'with_front' => false
        ),
    );
    register_post_type( 'ourproducts', $args );
}
add_action( 'init', 'custom_ourproducts_post_type', 0 );

// Register Custom Taxonomy
function custom_product_taxonomy() {
    $labels = array(
        'name'                       => _x( 'Product Categories', 'Taxonomy General Name', 'text_domain' ),
        'singular_name'              => _x( 'Product Category', 'Taxonomy Singular Name', 'text_domain' ),
        'menu_name'                  => __( 'Product Categories', 'text_domain' ),
        'all_items'                  => __( 'All Categories', 'text_domain' ),
        'parent_item'                => __( 'Parent Category', 'text_domain' ),
        'parent_item_colon'          => __( 'Parent Category:', 'text_domain' ),
        'new_item_name'              => __( 'New Category Name', 'text_domain' ),
        'add_new_item'               => __( 'Add New Category', 'text_domain' ),
        'edit_item'                  => __( 'Edit Category', 'text_domain' ),
        'update_item'                => __( 'Update Category', 'text_domain' ),
        'view_item'                  => __( 'View Category', 'text_domain' ),
        'separate_items_with_commas' => __( 'Separate categories with commas', 'text_domain' ),
        'add_or_remove_items'        => __( 'Add or remove categories', 'text_domain' ),
        'choose_from_most_used'      => __( 'Choose from the most used', 'text_domain' ),
        'popular_items'              => __( 'Popular Categories', 'text_domain' ),
        'search_items'               => __( 'Search Categories', 'text_domain' ),
        'not_found'                  => __( 'Not Found', 'text_domain' ),
        'no_terms'                   => __( 'No categories', 'text_domain' ),
        'items_list'                 => __( 'Categories list', 'text_domain' ),
        'items_list_navigation'      => __( 'Categories list navigation', 'text_domain' ),
    );
    $args = array(
        'labels' => $labels,
        'hierarchical' => true,
        'public' => true,
        'show_ui' => true,
        'show_admin_column' => true,
        'show_in_nav_menus' => true,
        'show_tagcloud' => true,
        'rewrite' => array(
            'slug' => 'category',
            'with_front' => false,
            'hierarchical' => true
        )
    );
    register_taxonomy( 'product_category', array( 'ourproducts' ), $args );
}
add_action( 'init', 'custom_product_taxonomy', 0 );

// Filter the permalink to include taxonomy slug
function filter_ourproducts_permalink($post_link, $post) {
    if ( $post->post_type === 'ourproducts' ) {
        $terms = wp_get_post_terms($post->ID, 'product_category');
        if ( ! empty($terms) && ! is_wp_error($terms) ) {
            return str_replace('%product_category%', $terms[0]->slug, $post_link);
        } else {
            return str_replace('%product_category%', 'uncategorized', $post_link);
        }
    }
    return $post_link;
}
add_filter( 'post_type_link', 'filter_ourproducts_permalink', 10, 2 );