<?php
/**
 * @package WPSEO\Internals\Options
 */

/**
 * Option: wpseo_xml.
 */
class WPSEO_Option_XML extends WPSEO_Option {

	/**
	 * @var  string  Option name.
	 */
	public $option_name = 'wpseo_xml';

	/**
	 * @var  string  Option group name for use in settings forms.
	 */
	public $group_name = 'yoast_wpseo_xml_sitemap_options';

	/**
	 * @var  array  Array of defaults for the option.
	 *        Shouldn't be requested directly, use $this->get_defaults();
	 */
	protected $defaults = array(
		'disable_author_sitemap' => true,
		'disable_author_noposts' => true,
		'enablexmlsitemap'       => true,
		'entries-per-page'       => 1000,
		'excluded-posts'         => '',

		/**
		 * Uses enrich_defaults to add more along the lines of:
		 * - 'user_role-' .  $role_name . '-not_in_sitemap'  => bool
		 * - 'post_types-' . $pt->name . '-not_in_sitemap'  => bool
		 * - 'taxonomies-' . $tax->name . '-not_in_sitemap'  => bool
		 */
	);

	/**
	 * @var  array  Array of variable option name patterns for the option.
	 */
	protected $variable_array_key_patterns = array(
		'user_role-',
		'post_types-',
		'taxonomies-',
	);


	/**
	 * Add the actions and filters for the option.
	 *
	 * @todo [JRF => testers] Check if the extra actions below would run into problems if an option
	 *       is updated early on and if so, change the call to schedule these for a later action on add/update
	 *       instead of running them straight away.
	 *
	 * @return \WPSEO_Option_XML
	 */
	protected function __construct() {
		parent::__construct();
		add_action( 'update_option_' . $this->option_name, array( 'WPSEO_Utils', 'clear_rewrites' ) );
		add_action( 'update_option_' . $this->option_name, array( 'WPSEO_Sitemaps_Cache', 'clear' ) );
	}


	/**
	 * Get the singleton instance of this class.
	 *
	 * @return object
	 */
	public static function get_instance() {
		if ( ! ( self::$instance instanceof self ) ) {
			self::$instance = new self();
		}

		return self::$instance;
	}

	/**
	 * Add dynamically created default options based on available post types and taxonomies.
	 *
	 * @return  void
	 */
	public function enrich_defaults() {

		$user_roles          = WPSEO_Utils::get_roles();
		$filtered_user_roles = apply_filters( 'wpseo_sitemaps_supported_user_roles', $user_roles );
		if ( is_array( $filtered_user_roles ) && $filtered_user_roles !== array() ) {
			foreach ( $filtered_user_roles as $role_name => $role_value ) {
				$this->defaults[ 'user_role-' . $role_name . '-not_in_sitemap' ] = false;

				unset( $user_role );
			}
			unset( $role_name, $role_value );
		}
		unset( $user_roles, $filtered_user_roles );

		// Consider using WPSEO_Post_Type::get_accessible_post_types() to filter out any `no-index` post-types.
		$post_type_names     = get_post_types( array( 'public' => true ), 'names' );
		$filtered_post_types = apply_filters( 'wpseo_sitemaps_supported_post_types', $post_type_names );

		if ( is_array( $filtered_post_types ) && $filtered_post_types !== array() ) {
			foreach ( $filtered_post_types as $pt ) {
				if ( $pt !== 'attachment' ) {
					$this->defaults[ 'post_types-' . $pt . '-not_in_sitemap' ] = false;
				}
				else {
					$this->defaults[ 'post_types-' . $pt . '-not_in_sitemap' ] = true;
				}
			}
			unset( $pt );
		}
		unset( $post_type_names, $filtered_post_types );

		$taxonomy_objects    = get_taxonomies( array( 'public' => true ), 'objects' );
		$filtered_taxonomies = apply_filters( 'wpseo_sitemaps_supported_taxonomies', $taxonomy_objects );
		if ( is_array( $filtered_taxonomies ) && $filtered_taxonomies !== array() ) {
			foreach ( $filtered_taxonomies as $tax ) {
				if ( isset( $tax->labels->name ) && trim( $tax->labels->name ) !== '' ) {
					$this->defaults[ 'taxonomies-' . $tax->name . '-not_in_sitemap' ] = false;
				}
			}
			unset( $tax );
		}
		unset( $taxonomy_objects, $filtered_taxonomies );

	}


	/**
	 * Validate the option.
	 *
	 * @param  array $dirty New value for the option.
	 * @param  array $clean Clean value for the option, normally the defaults.
	 * @param  array $old   Old value of the option.
	 *
	 * @return  array      Validated clean value for the option to be saved to the database.
	 */
	protected function validate_option( $dirty, $clean, $old ) {

		foreach ( $clean as $key => $value ) {
			$switch_key = $this->get_switch_key( $key );

			switch ( $switch_key ) {
				/* Integer fields */
				case 'entries-per-page':
					if ( isset( $dirty[ $key ] ) && $dirty[ $key ] !== '' ) {

						$int = WPSEO_Utils::validate_int( $dirty[ $key ] );

						if ( $int !== false && $int > 0 ) {

							if ( $int > 50000 ) {

								$error_message = sprintf(
									/* translators: 1: number; 2: number received from user. */
									__( '"Max entries per sitemap page" should be below %1$s to meet Google\'s requirements, which %2$s is not.', 'wordpress-seo' ),
									number_format_i18n( 50000 ), '<strong>' . esc_html( sanitize_text_field( $dirty[ $key ] ) ) . '</strong>'
								);
								add_settings_error( $this->group_name, '_' . $key, $error_message, 'error' );

								$int = 50000;
							}

							$clean[ $key ] = $int;
						}
						else {

							if ( isset( $old[ $key ] ) && $old[ $key ] !== '' ) {

								$int = WPSEO_Utils::validate_int( $old[ $key ] );

								if ( $int !== false && $int > 0 ) {
									$clean[ $key ] = $int;
								}
							}

							$error_message = sprintf(
								/* translators: %s expands to a number. */
								__( '"Max entries per sitemap page" should be a positive number, which %s is not. Please correct.', 'wordpress-seo' ),
								'<strong>' . esc_html( sanitize_text_field( $dirty[ $key ] ) ) . '</strong>'
							);
							add_settings_error( $this->group_name, '_' . $key, $error_message, 'error' );
						}
						unset( $int );
					}
					break;

				case 'excluded-posts':
					if ( isset( $dirty[ $key ] ) && $dirty[ $key ] !== '' ) {
						$filtered_array = filter_var_array( explode( ',', $dirty[ $key ] ), FILTER_VALIDATE_INT );
						if ( is_array( $filtered_array ) ) {
							$clean[ $key ] = implode( ',', array_filter( $filtered_array, 'is_integer' ) );
						}
						unset( $filtered_array );
					}

					break;

				/*
				 * Boolean fields.
				 */

				/*
				 * Covers:
				 *  'disable_author_sitemap':
				 *  'disable_author_noposts':
				 *  'enablexmlsitemap':
				 *  'user_role-':
				 *  'user_role' . $role_name . '-not_in_sitemap' fields
				 *  'post_types-':
				 *  'post_types-' . $pt->name . '-not_in_sitemap' fields
				 *  'taxonomies-':
				 *  'taxonomies-' . $tax->name . '-not_in_sitemap' fields
				 */
				default:
					$clean[ $key ] = ( isset( $dirty[ $key ] ) ? WPSEO_Utils::validate_bool( $dirty[ $key ] ) : false );
					break;
			}
		}

		return $clean;
	}


	/**
	 * Clean a given option value.
	 *
	 * @param  array  $option_value          Old (not merged with defaults or filtered) option value to
	 *                                       clean according to the rules for this option.
	 * @param  string $current_version       Optional. Version from which to upgrade, if not set,
	 *                                       version specific upgrades will be disregarded.
	 * @param  array  $all_old_option_values Optional. Only used when importing old options to have
	 *                                       access to the real old values, in contrast to the saved ones.
	 *
	 * @return  array            Cleaned option
	 */
	protected function clean_option( $option_value, $current_version = null, $all_old_option_values = null ) {
		/*
		 * Make sure the values of the variable option key options are cleaned as they
		 * may be retained and would not be cleaned/validated then.
		 */
		if ( is_array( $option_value ) && $option_value !== array() ) {

			foreach ( $option_value as $key => $value ) {
				$switch_key = $this->get_switch_key( $key );

				// Similar to validation routine - any changes made there should be made here too.
				switch ( $switch_key ) {
					case 'user_role-': /* 'user_role-' . $role_name. '-not_in_sitemap' fields. */
					case 'post_types-': /* 'post_types-' . $pt->name . '-not_in_sitemap' fields. */
					case 'taxonomies-': /* 'taxonomies-' . $tax->name . '-not_in_sitemap' fields. */
						$option_value[ $key ] = WPSEO_Utils::validate_bool( $value );
						break;
				}
			}
		}

		return $option_value;
	}
}