<?php
/**
 * WPSEO Premium plugin file.
 *
 * @package WPSEO\Admin
 */

/**
 * Registers the prominent words as a taxonomy.
 */
class WPSEO_Premium_Prominent_Words_Registration implements WPSEO_WordPress_Integration {

	const TERM_NAME = 'yst_prominent_words';

	/**
	 * {@inheritdoc}
	 */
	public function register_hooks() {
		add_action( 'init', array( $this, 'register' ), 20 );
		add_action( 'admin_init', array( $this, 'unregister' ) );
	}

	/**
	 * Removes the taxonomy from the registration.
	 *
	 * This makes sure that no unneeded queries are done relating these private terms.
	 */
	public function unregister() {
		if ( ! $this->is_visible() ) {
			unregister_taxonomy( self::TERM_NAME );
		}
	}

	/**
	 * Registers the prominent words taxonomy.
	 */
	public function register() {
		$prominent_words_support    = new WPSEO_Premium_Prominent_Words_Support();
		$prominent_words_post_types = $prominent_words_support->get_supported_post_types();

		if ( $prominent_words_post_types === array() ) {
			return;
		}

		// REST API expects a numbered list of post types.
		$post_types = array_values( $prominent_words_post_types );

		register_taxonomy( self::TERM_NAME, $post_types, $this->get_args() );
	}

	/**
	 * Retrieves the labels for the taxonomy.
	 *
	 * @return array The labels for the taxonomy.
	 */
	private function get_labels() {
		return array(
			'name'                       => _x( 'Prominent words', 'Taxonomy General Name', 'wordpress-seo-premium' ),
			'singular_name'              => _x( 'Prominent word', 'Taxonomy Singular Name', 'wordpress-seo-premium' ),
			'menu_name'                  => __( 'Prominent words', 'wordpress-seo-premium' ),
			'all_items'                  => __( 'All prominent words', 'wordpress-seo-premium' ),
			'new_item_name'              => __( 'New prominent word', 'wordpress-seo-premium' ),
			'add_new_item'               => __( 'Add new prominent word', 'wordpress-seo-premium' ),
			'edit_item'                  => __( 'Edit prominent word', 'wordpress-seo-premium' ),
			'update_item'                => __( 'Update prominent word', 'wordpress-seo-premium' ),
			'view_item'                  => __( 'View prominent word', 'wordpress-seo-premium' ),
			'separate_items_with_commas' => __( 'Separate prominent words with commas', 'wordpress-seo-premium' ),
			'add_or_remove_items'        => __( 'Add or remove prominent words', 'wordpress-seo-premium' ),
			'choose_from_most_used'      => __( 'Choose from the most used', 'wordpress-seo-premium' ),
			'popular_items'              => __( 'Popular prominent words', 'wordpress-seo-premium' ),
			'search_items'               => __( 'Search prominent words', 'wordpress-seo-premium' ),
			'not_found'                  => __( 'Not Found', 'wordpress-seo-premium' ),
			'no_terms'                   => __( 'No prominent words', 'wordpress-seo-premium' ),
			'items_list'                 => __( 'Prominent words list', 'wordpress-seo-premium' ),
			'items_list_navigation'      => __( 'Prominent words list navigation', 'wordpress-seo-premium' ),
		);
	}

	/**
	 * Retrieves the arguments for the taxonomy registration.
	 *
	 * @return array The arguments for the registration to WordPress.
	 */
	private function get_args() {
		return array(
			'labels'                     => $this->get_labels(),
			'hierarchical'               => false,
			'public'                     => false,
			'show_ui'                    => $this->is_visible(),
			'show_admin_column'          => false,
			'show_in_nav_menus'          => false,
			'show_tagcloud'              => false,
			'show_in_rest'               => true,
			'capabilities'               => array( 'edit_terms' => 'edit_posts' ),
		);
	}

	/**
	 * Determines if the prominent words should be visible in the menu.
	 *
	 * @return bool True if the prominent words should be shown.
	 */
	private function is_visible() {
		return ( defined( 'WPSEO_DEBUG' ) && WPSEO_DEBUG );
	}
}