<?php
/**
 * Administration API: WP_List_Table class
 *
 * @package WordPress
 * @subpackage List_Table
 * @since 3.1.0
 */

/**
 * Base class for displaying a list of items in an ajaxified HTML table.
 *
 * @since 3.1.0
 * @access private
 */
class WP_List_Table {

	/**
	 * The current list of items.
	 *
	 * @since 3.1.0
	 * @var array
	 */
	public $items;

	/**
	 * Various information about the current table.
	 *
	 * @since 3.1.0
	 * @var array
	 */
	protected $_args;

	/**
	 * Various information needed for displaying the pagination.
	 *
	 * @since 3.1.0
	 * @var array
	 */
	protected $_pagination_args = array();

	/**
	 * The current screen.
	 *
	 * @since 3.1.0
	 * @var object
	 */
	protected $screen;

	/**
	 * Cached bulk actions.
	 *
	 * @since 3.1.0
	 * @var array
	 */
	private $_actions;

	/**
	 * Cached pagination output.
	 *
	 * @since 3.1.0
	 * @var string
	 */
	private $_pagination;

	/**
	 * The view switcher modes.
	 *
	 * @since 4.1.0
	 * @var array
	 */
	protected $modes = array();

	/**
	 * Stores the value returned by ->get_column_info().
	 *
	 * @since 4.1.0
	 * @var array
	 */
	protected $_column_headers;

	/**
	 * {@internal Missing Summary}
	 *
	 * @var array
	 */
	protected $compat_fields = array( '_args', '_pagination_args', 'screen', '_actions', '_pagination' );

	/**
	 * {@internal Missing Summary}
	 *
	 * @var array
	 */
	protected $compat_methods = array(
		'set_pagination_args',
		'get_views',
		'get_bulk_actions',
		'bulk_actions',
		'row_actions',
		'months_dropdown',
		'view_switcher',
		'comments_bubble',
		'get_items_per_page',
		'pagination',
		'get_sortable_columns',
		'get_column_info',
		'get_table_classes',
		'display_tablenav',
		'extra_tablenav',
		'single_row_columns',
	);

	/**
	 * Constructor.
	 *
	 * The child class should call this constructor from its own constructor to override
	 * the default $args.
	 *
	 * @since 3.1.0
	 *
	 * @param array|string $args {
	 *     Array or string of arguments.
	 *
	 *     @type string $plural   Plural value used for labels and the objects being listed.
	 *                            This affects things such as CSS class-names and nonces used
	 *                            in the list table, e.g. 'posts'. Default empty.
	 *     @type string $singular Singular label for an object being listed, e.g. 'post'.
	 *                            Default empty
	 *     @type bool   $ajax     Whether the list table supports Ajax. This includes loading
	 *                            and sorting data, for example. If true, the class will call
	 *                            the _js_vars() method in the footer to provide variables
	 *                            to any scripts handling Ajax events. Default false.
	 *     @type string $screen   String containing the hook name used to determine the current
	 *                            screen. If left null, the current screen will be automatically set.
	 *                            Default null.
	 * }
	 */
	public function __construct( $args = array() ) {
		$args = wp_parse_args(
			$args,
			array(
				'plural'   => '',
				'singular' => '',
				'ajax'     => false,
				'screen'   => null,
			)
		);

		$this->screen = convert_to_screen( $args['screen'] );

		add_filter( "manage_{$this->screen->id}_columns", array( $this, 'get_columns' ), 0 );

		if ( ! $args['plural'] ) {
			$args['plural'] = $this->screen->base;
		}

		$args['plural']   = sanitize_key( $args['plural'] );
		$args['singular'] = sanitize_key( $args['singular'] );

		$this->_args = $args;

		if ( $args['ajax'] ) {
			// wp_enqueue_script( 'list-table' );
			add_action( 'admin_footer', array( $this, '_js_vars' ) );
		}

		if ( empty( $this->modes ) ) {
			$this->modes = array(
				'list'    => __( 'Compact view' ),
				'excerpt' => __( 'Extended view' ),
			);
		}
	}

	/**
	 * Make private properties readable for backward compatibility.
	 *
	 * @since 4.0.0
	 *
	 * @param string $name Property to get.
	 * @return mixed Property.
	 */
	public function __get( $name ) {
		if ( in_array( $name, $this->compat_fields, true ) ) {
			return $this->$name;
		}
	}

	/**
	 * Make private properties settable for backward compatibility.
	 *
	 * @since 4.0.0
	 *
	 * @param string $name  Property to check if set.
	 * @param mixed  $value Property value.
	 * @return mixed Newly-set property.
	 */
	public function __set( $name, $value ) {
		if ( in_array( $name, $this->compat_fields, true ) ) {
			return $this->$name = $value;
		}
	}

	/**
	 * Make private properties checkable for backward compatibility.
	 *
	 * @since 4.0.0
	 *
	 * @param string $name Property to check if set.
	 * @return bool Whether the property is set.
	 */
	public function __isset( $name ) {
		if ( in_array( $name, $this->compat_fields, true ) ) {
			return isset( $this->$name );
		}
	}

	/**
	 * Make private properties un-settable for backward compatibility.
	 *
	 * @since 4.0.0
	 *
	 * @param string $name Property to unset.
	 */
	public function __unset( $name ) {
		if ( in_array( $name, $this->compat_fields, true ) ) {
			unset( $this->$name );
		}
	}

	/**
	 * Make private/protected methods readable for backward compatibility.
	 *
	 * @since 4.0.0
	 *
	 * @param string $name      Method to call.
	 * @param array  $arguments Arguments to pass when calling.
	 * @return mixed|bool Return value of the callback, false otherwise.
	 */
	public function __call( $name, $arguments ) {
		if ( in_array( $name, $this->compat_methods, true ) ) {
			return $this->$name( ...$arguments );
		}
		return false;
	}

	/**
	 * Checks the current user's permissions
	 *
	 * @since 3.1.0
	 * @abstract
	 */
	public function ajax_user_can() {
		die( 'function WP_List_Table::ajax_user_can() must be overridden in a subclass.' );
	}

	/**
	 * Prepares the list of items for displaying.
	 *
	 * @uses WP_List_Table::set_pagination_args()
	 *
	 * @since 3.1.0
	 * @abstract
	 */
	public function prepare_items() {
		die( 'function WP_List_Table::prepare_items() must be overridden in a subclass.' );
	}

	/**
	 * An internal method that sets all the necessary pagination arguments
	 *
	 * @since 3.1.0
	 *
	 * @param array|string $args Array or string of arguments with information about the pagination.
	 */
	protected function set_pagination_args( $args ) {
		$args = wp_parse_args(
			$args,
			array(
				'total_items' => 0,
				'total_pages' => 0,
				'per_page'    => 0,
			)
		);

		if ( ! $args['total_pages'] && $args['per_page'] > 0 ) {
			$args['total_pages'] = ceil( $args['total_items'] / $args['per_page'] );
		}

		// Redirect if page number is invalid and headers are not already sent.
		if ( ! headers_sent() && ! wp_doing_ajax() && $args['total_pages'] > 0 && $this->get_pagenum() > $args['total_pages'] ) {
			wp_redirect( add_query_arg( 'paged', $args['total_pages'] ) );
			exit;
		}

		$this->_pagination_args = $args;
	}

	/**
	 * Access the pagination args.
	 *
	 * @since 3.1.0
	 *
	 * @param string $key Pagination argument to retrieve. Common values include 'total_items',
	 *                    'total_pages', 'per_page', or 'infinite_scroll'.
	 * @return int Number of items that correspond to the given pagination argument.
	 */
	public function get_pagination_arg( $key ) {
		if ( 'page' === $key ) {
			return $this->get_pagenum();
		}

		if ( isset( $this->_pagination_args[ $key ] ) ) {
			return $this->_pagination_args[ $key ];
		}
	}

	/**
	 * Whether the table has items to display or not
	 *
	 * @since 3.1.0
	 *
	 * @return bool
	 */
	public function has_items() {
		return ! empty( $this->items );
	}

	/**
	 * Message to be displayed when there are no items
	 *
	 * @since 3.1.0
	 */
	public function no_items() {
		_e( 'No items found.' );
	}

	/**
	 * Displays the search box.
	 *
	 * @since 3.1.0
	 *
	 * @param string $text     The 'submit' button label.
	 * @param string $input_id ID attribute value for the search input field.
	 */
	public function search_box( $text, $input_id ) {
		if ( empty( $_REQUEST['s'] ) && ! $this->has_items() ) {
			return;
		}

		$input_id = $input_id . '-search-input';

		if ( ! empty( $_REQUEST['orderby'] ) ) {
			echo '<input type="hidden" name="orderby" value="' . esc_attr( $_REQUEST['orderby'] ) . '" />';
		}
		if ( ! empty( $_REQUEST['order'] ) ) {
			echo '<input type="hidden" name="order" value="' . esc_attr( $_REQUEST['order'] ) . '" />';
		}
		if ( ! empty( $_REQUEST['post_mime_type'] ) ) {
			echo '<input type="hidden" name="post_mime_type" value="' . esc_attr( $_REQUEST['post_mime_type'] ) . '" />';
		}
		if ( ! empty( $_REQUEST['detached'] ) ) {
			echo '<input type="hidden" name="detached" value="' . esc_attr( $_REQUEST['detached'] ) . '" />';
		}
		?>

	<label class="screen-reader-text" for="<?php echo esc_attr( $input_id ); ?>"><?php echo $text; ?>:
	<input type="search" id="<?php echo esc_attr( $input_id ); ?>" name="s" value="<?php _admin_search_query(); ?>" />
		<?php submit_button( $text, '', '', false, array( 'id' => 'search-submit' ) ); ?>

		<?php
	}

	/**
	 * Gets the list of views available on this table.
	 *
	 * The format is an associative array:
	 * - `'id' => 'link'`
	 *
	 * @since 3.1.0
	 *
	 * @return array
	 */
	protected function get_views() {
		return array();
	}

	/**
	 * Displays the list of views available on this table.
	 *
	 * @since 3.1.0
	 */
	public function views() {
		$views = $this->get_views();
		/**
		 * Filters the list of available list table views.
		 *
		 * The dynamic portion of the hook name, `$this->screen->id`, refers
		 * to the ID of the current screen, usually a string.
		 *
		 * @since 3.1.0
		 *
		 * @param string[] $views An array of available list table views.
		 */
		$views = apply_filters( "views_{$this->screen->id}", $views );

		if ( empty( $views ) ) {
			return;
		}

		$this->screen->render_screen_reader_content( 'heading_views' );

		echo "
\n";
		foreach ( $views as $class => $view ) {
			$views[ $class ] = "\t
$view";
		}
		echo implode( " |
\n", $views ) . "
\n";
		echo '
';
	}

	/**
	 * Gets the list of bulk actions available on this table.
	 *
	 * The format is an associative array:
	 * - `'option_name' => 'option_title'`
	 *
	 * @since 3.1.0
	 *
	 * @return array
	 */
	protected function get_bulk_actions() {
		return array();
	}

	/**
	 * Displays the bulk actions dropdown.
	 *
	 * @since 3.1.0
	 *
	 * @param string $which The location of the bulk actions: 'top' or 'bottom'.
	 *                      This is designated as optional for backward compatibility.
	 */
	protected function bulk_actions( $which = '' ) {
		if ( is_null( $this->_actions ) ) {
			$this->_actions = $this->get_bulk_actions();

			/**
			 * Filters the list table bulk actions drop-down.
			 *
			 * The dynamic portion of the hook name, `$this->screen->id`, refers
			 * to the ID of the current screen, usually a string.
			 *
			 * @since 3.1.0
			 *
			 * @param string[] $actions An array of the available bulk actions.
			 */
			$this->_actions = apply_filters( "bulk_actions-{$this->screen->id}", $this->_actions ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores

			$two = '';
		} else {
			$two = '2';
		}

		if ( empty( $this->_actions ) ) {
			return;
		}

		echo '' . __( 'Select bulk action' ) . '';
		echo '<select name="action' . $two . '" id="bulk-action-selector-' . esc_attr( $which ) . "\">\n";
		echo '<option value="-1">' . __( 'Bulk actions' ) . "</option>\n";

		foreach ( $this->_actions as $name => $title ) {
			$class = 'edit' === $name ? ' class="hide-if-no-js"' : '';

			echo "\t" . '<option value="' . $name . '"' . $class . '>' . $title . "</option>\n";
		}

		echo "</select>\n";

		submit_button( __( 'Apply' ), 'action', '', false, array( 'id' => "doaction$two" ) );
		echo "\n";
	}

	/**
	 * Gets the current action selected from the bulk actions dropdown.
	 *
	 * @since 3.1.0
	 *
	 * @return string|false The action name. False if no action was selected.
	 */
	public function current_action() {
		if ( isset( $_REQUEST['filter_action'] ) && ! empty( $_REQUEST['filter_action'] ) ) {
			return false;
		}

		if ( isset( $_REQUEST['action'] ) && -1 != $_REQUEST['action'] ) {
			return $_REQUEST['action'];
		}

		if ( isset( $_REQUEST['action2'] ) && -1 != $_REQUEST['action2'] ) {
			return $_REQUEST['action2'];
		}

		return false;
	}

	/**
	 * Generates the required HTML for a list of row action links.
	 *
	 * @since 3.1.0
	 *
	 * @param string[] $actions        An array of action links.
	 * @param bool     $always_visible Whether the actions should be always visible.
	 * @return string The HTML for the row actions.
	 */
	protected function row_actions( $actions, $always_visible = false ) {
		$action_count = count( $actions );

		if ( ! $action_count ) {
			return '';
		}

		$mode = get_user_setting( 'posts_list_mode', 'list' );

		if ( 'excerpt' === $mode ) {
			$always_visible = true;
		}

		$out = '
';

		$i = 0;

		foreach ( $actions as $action => $link ) {
			++$i;

			$sep = ( $i < $action_count ) ? ' | ' : '';

			$out .= "$link$sep";
		}

		$out .= '
';

		$out .= '<button type="button" class="toggle-row">' . __( 'Show more details' ) . '</button>';

		return $out;
	}

	/**
	 * Displays a dropdown for filtering items in the list table by month.
	 *
	 * @since 3.1.0
	 *
	 * @global wpdb      $wpdb      WordPress database abstraction object.
	 * @global WP_Locale $wp_locale WordPress date and time locale object.
	 *
	 * @param string $post_type The post type.
	 */
	protected function months_dropdown( $post_type ) {
		global $wpdb, $wp_locale;

		/**
		 * Filters whether to remove the 'Months' drop-down from the post list table.
		 *
		 * @since 4.2.0
		 *
		 * @param bool   $disable   Whether to disable the drop-down. Default false.
		 * @param string $post_type The post type.
		 */
		if ( apply_filters( 'disable_months_dropdown', false, $post_type ) ) {
			return;
		}

		$extra_checks = "AND post_status != 'auto-draft'";
		if ( ! isset( $_GET['post_status'] ) || 'trash' !== $_GET['post_status'] ) {
			$extra_checks .= " AND post_status != 'trash'";
		} elseif ( isset( $_GET['post_status'] ) ) {
			$extra_checks = $wpdb->prepare( ' AND post_status = %s', $_GET['post_status'] );
		}

		$months = $wpdb->get_results(
			$wpdb->prepare(
				"
			SELECT DISTINCT YEAR( post_date ) AS year, MONTH( post_date ) AS month
			FROM $wpdb->posts
			WHERE post_type = %s
			$extra_checks
			ORDER BY post_date DESC
		",
				$post_type
			)
		);

		/**
		 * Filters the 'Months' drop-down results.
		 *
		 * @since 3.7.0
		 *
		 * @param object[] $months    Array of the months drop-down query results.
		 * @param string   $post_type The post type.
		 */
		$months = apply_filters( 'months_dropdown_results', $months, $post_type );

		$month_count = count( $months );

		if ( ! $month_count || ( 1 == $month_count && 0 == $months[0]->month ) ) {
			return;
		}

		$m = isset( $_GET['m'] ) ? (int) $_GET['m'] : 0;
		?>
		<?php _e( 'Filter by date' ); ?>
		<select name="m" id="filter-by-date">
			<option<?php selected( $m, 0 ); ?> value="0"><?php _e( 'All dates' ); ?></option>
		<?php
		foreach ( $months as $arc_row ) {
			if ( 0 == $arc_row->year ) {
				continue;
			}

			$month = zeroise( $arc_row->month, 2 );
			$year  = $arc_row->year;

			printf(
				"<option %s value='%s'>%s</option>\n",
				selected( $m, $year . $month, false ),
				esc_attr( $arc_row->year . $month ),
				/* translators: 1: Month name, 2: 4-digit year. */
				sprintf( __( '%1$s %2$d' ), $wp_locale->get_month( $month ), $year )
			);
		}
		?>
		</select>
		<?php
	}

	/**
	 * Displays a view switcher.
	 *
	 * @since 3.1.0
	 *
	 * @param string $current_mode
	 */
	protected function view_switcher( $current_mode ) {
		?>
		<input type="hidden" name="mode" value="<?php echo esc_attr( $current_mode ); ?>" />

		<?php
		foreach ( $this->modes as $mode => $title ) {
			$classes      = array( 'view-' . $mode );
			$aria_current = '';

			if ( $current_mode === $mode ) {
				$classes[]    = 'current';
				$aria_current = ' aria-current="page"';
			}

			printf(
				"%s\n",
				esc_url( remove_query_arg( 'attachment-filter', add_query_arg( 'mode', $mode ) ) ),
				implode( ' ', $classes ),
				$title
			);
		}
		?>

		<?php
	}

	/**
	 * Displays a comment count bubble.
	 *
	 * @since 3.1.0
	 *
	 * @param int $post_id          The post ID.
	 * @param int $pending_comments Number of pending comments.
	 */
	protected function comments_bubble( $post_id, $pending_comments ) {
		$approved_comments = get_comments_number();

		$approved_comments_number = number_format_i18n( $approved_comments );
		$pending_comments_number  = number_format_i18n( $pending_comments );

		$approved_only_phrase = sprintf(
			/* translators: %s: Number of comments. */
			_n( '%s comment', '%s comments', $approved_comments ),
			$approved_comments_number
		);

		$approved_phrase = sprintf(
			/* translators: %s: Number of comments. */
			_n( '%s approved comment', '%s approved comments', $approved_comments ),
			$approved_comments_number
		);

		$pending_phrase = sprintf(
			/* translators: %s: Number of comments. */
			_n( '%s pending comment', '%s pending comments', $pending_comments ),
			$pending_comments_number
		);

		if ( ! $approved_comments && ! $pending_comments ) {
			// No comments at all.
			printf(
				'—%s',
				__( 'No comments' )
			);
		} elseif ( $approved_comments && 'trash' === get_post_status( $post_id ) ) {
			// Don't link the comment bubble for a trashed post.
			printf(
				'%s%s',
				$approved_comments_number,
				$pending_comments ? $approved_phrase : $approved_only_phrase
			);
		} elseif ( $approved_comments ) {
			// Link the comment bubble to approved comments.
			printf(
				'%s%s',
				esc_url(
					add_query_arg(
						array(
							'p'              => $post_id,
							'comment_status' => 'approved',
						),
						admin_url( 'edit-comments.php' )
					)
				),
				$approved_comments_number,
				$pending_comments ? $approved_phrase : $approved_only_phrase
			);
		} else {
			// Don't link the comment bubble when there are no approved comments.
			printf(
				'%s%s',
				$approved_comments_number,
				$pending_comments ? __( 'No approved comments' ) : __( 'No comments' )
			);
		}

		if ( $pending_comments ) {
			printf(
				'%s%s',
				esc_url(
					add_query_arg(
						array(
							'p'              => $post_id,
							'comment_status' => 'moderated',
						),
						admin_url( 'edit-comments.php' )
					)
				),
				$pending_comments_number,
				$pending_phrase
			);
		} else {
			printf(
				'%s%s',
				$pending_comments_number,
				$approved_comments ? __( 'No pending comments' ) : __( 'No comments' )
			);
		}
	}

	/**
	 * Gets the current page number.
	 *
	 * @since 3.1.0
	 *
	 * @return int
	 */
	public function get_pagenum() {
		$pagenum = isset( $_REQUEST['paged'] ) ? absint( $_REQUEST['paged'] ) : 0;

		if ( isset( $this->_pagination_args['total_pages'] ) && $pagenum > $this->_pagination_args['total_pages'] ) {
			$pagenum = $this->_pagination_args['total_pages'];
		}

		return max( 1, $pagenum );
	}

	/**
	 * Gets the number of items to display on a single page.
	 *
	 * @since 3.1.0
	 *
	 * @param string $option
	 * @param int    $default
	 * @return int
	 */
	protected function get_items_per_page( $option, $default = 20 ) {
		$per_page = (int) get_user_option( $option );
		if ( empty( $per_page ) || $per_page < 1 ) {
			$per_page = $default;
		}

		/**
		 * Filters the number of items to be displayed on each page of the list table.
		 *
		 * The dynamic hook name, `$option`, refers to the `per_page` option depending
		 * on the type of list table in use. Possible filter names include:
		 *
		 *  - `edit_comments_per_page`
		 *  - `sites_network_per_page`
		 *  - `site_themes_network_per_page`
		 *  - `themes_network_per_page'`
		 *  - `users_network_per_page`
		 *  - `edit_post_per_page`
		 *  - `edit_page_per_page'`
		 *  - `edit_{$post_type}_per_page`
		 *  - `edit_post_tag_per_page`
		 *  - `edit_category_per_page`
		 *  - `edit_{$taxonomy}_per_page`
		 *  - `site_users_network_per_page`
		 *  - `users_per_page`
		 *
		 * @since 2.9.0
		 *
		 * @param int $per_page Number of items to be displayed. Default 20.
		 */
		return (int) apply_filters( "{$option}", $per_page );
	}

	/**
	 * Displays the pagination.
	 *
	 * @since 3.1.0
	 *
	 * @param string $which
	 */
	protected function pagination( $which ) {
		if ( empty( $this->_pagination_args ) ) {
			return;
		}

		$total_items     = $this->_pagination_args['total_items'];
		$total_pages     = $this->_pagination_args['total_pages'];
		$infinite_scroll = false;
		if ( isset( $this->_pagination_args['infinite_scroll'] ) ) {
			$infinite_scroll = $this->_pagination_args['infinite_scroll'];
		}

		if ( 'top' === $which && $total_pages > 1 ) {
			$this->screen->render_screen_reader_content( 'heading_pagination' );
		}

		$output = '' . sprintf(
			/* translators: %s: Number of items. */
			_n( '%s item', '%s items', $total_items ),
			number_format_i18n( $total_items )
		) . '';

		$current              = $this->get_pagenum();
		$removable_query_args = wp_removable_query_args();

		$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );

		$current_url = remove_query_arg( $removable_query_args, $current_url );

		$page_links = array();

		$total_pages_before = '';
		$total_pages_after  = '';

		$disable_first = false;
		$disable_last  = false;
		$disable_prev  = false;
		$disable_next  = false;

		if ( 1 == $current ) {
			$disable_first = true;
			$disable_prev  = true;
		}
		if ( 2 == $current ) {
			$disable_first = true;
		}
		if ( $total_pages == $current ) {
			$disable_last = true;
			$disable_next = true;
		}
		if ( $total_pages - 1 == $current ) {
			$disable_last = true;
		}

		if ( $disable_first ) {
			$page_links[] = '«';
		} else {
			$page_links[] = sprintf(
				"%s%s",
				esc_url( remove_query_arg( 'paged', $current_url ) ),
				__( 'First page' ),
				'«'
			);
		}

		if ( $disable_prev ) {
			$page_links[] = '‹';
		} else {
			$page_links[] = sprintf(
				"%s%s",
				esc_url( add_query_arg( 'paged', max( 1, $current - 1 ), $current_url ) ),
				__( 'Previous page' ),
				'‹'
			);
		}

		if ( 'bottom' === $which ) {
			$html_current_page  = $current;
			$total_pages_before = '' . __( 'Current Page' ) . '';
		} else {
			$html_current_page = sprintf(
				"%s<input class='current-page' id='current-page-selector' type='text' name='paged' value='%s' size='%d' aria-describedby='table-paging' />",
				'' . __( 'Current Page' ) . '',
				$current,
				strlen( $total_pages )
			);
		}
		$html_total_pages = sprintf( "%s", number_format_i18n( $total_pages ) );
		$page_links[]     = $total_pages_before . sprintf(
			/* translators: 1: Current page, 2: Total pages. */
			_x( '%1$s of %2$s', 'paging' ),
			$html_current_page,
			$html_total_pages
		) . $total_pages_after;

		if ( $disable_next ) {
			$page_links[] = '›';
		} else {
			$page_links[] = sprintf(
				"%s%s",
				esc_url( add_query_arg( 'paged', min( $total_pages, $current + 1 ), $current_url ) ),
				__( 'Next page' ),
				'›'
			);
		}

		if ( $disable_last ) {
			$page_links[] = '»';
		} else {
			$page_links[] = sprintf(
				"%s%s",
				esc_url( add_query_arg( 'paged', $total_pages, $current_url ) ),
				__( 'Last page' ),
				'»'
			);
		}

		$pagination_links_class = 'pagination-links';
		if ( ! empty( $infinite_scroll ) ) {
			$pagination_links_class .= ' hide-if-js';
		}
		$output .= "\n" . join( "\n", $page_links ) . '';

		if ( $total_pages ) {
			$page_class = $total_pages < 2 ? ' one-page' : '';
		} else {
			$page_class = ' no-pages';
		}
		$this->_pagination = "
$output
";

		echo $this->_pagination;
	}

	/**
	 * Gets a list of columns.
	 *
	 * The format is:
	 * - `'internal-name' => 'Title'`
	 *
	 * @since 3.1.0
	 * @abstract
	 *
	 * @return array
	 */
	public function get_columns() {
		die( 'function WP_List_Table::get_columns() must be overridden in a subclass.' );
	}

	/**
	 * Gets a list of sortable columns.
	 *
	 * The format is:
	 * - `'internal-name' => 'orderby'`
	 * - `'internal-name' => array( 'orderby', 'asc' )` - The second element sets the initial sorting order.
	 * - `'internal-name' => array( 'orderby', true )`  - The second element makes the initial order descending.
	 *
	 * @since 3.1.0
	 *
	 * @return array
	 */
	protected function get_sortable_columns() {
		return array();
	}

	/**
	 * Gets the name of the default primary column.
	 *
	 * @since 4.3.0
	 *
	 * @return string Name of the default primary column, in this case, an empty string.
	 */
	protected function get_default_primary_column_name() {
		$columns = $this->get_columns();
		$column  = '';

		if ( empty( $columns ) ) {
			return $column;
		}

		// We need a primary defined so responsive views show something,
		// so let's fall back to the first non-checkbox column.
		foreach ( $columns as $col => $column_name ) {
			if ( 'cb' === $col ) {
				continue;
			}

			$column = $col;
			break;
		}

		return $column;
	}

	/**
	 * Public wrapper for WP_List_Table::get_default_primary_column_name().
	 *
	 * @since 4.4.0
	 *
	 * @return string Name of the default primary column.
	 */
	public function get_primary_column() {
		return $this->get_primary_column_name();
	}

	/**
	 * Gets the name of the primary column.
	 *
	 * @since 4.3.0
	 *
	 * @return string The name of the primary column.
	 */
	protected function get_primary_column_name() {
		$columns = get_column_headers( $this->screen );
		$default = $this->get_default_primary_column_name();

		// If the primary column doesn't exist,
		// fall back to the first non-checkbox column.
		if ( ! isset( $columns[ $default ] ) ) {
			$default = WP_List_Table::get_default_primary_column_name();
		}

		/**
		 * Filters the name of the primary column for the current list table.
		 *
		 * @since 4.3.0
		 *
		 * @param string $default Column name default for the specific list table, e.g. 'name'.
		 * @param string $context Screen ID for specific list table, e.g. 'plugins'.
		 */
		$column = apply_filters( 'list_table_primary_column', $default, $this->screen->id );

		if ( empty( $column ) || ! isset( $columns[ $column ] ) ) {
			$column = $default;
		}

		return $column;
	}

	/**
	 * Gets a list of all, hidden and sortable columns, with filter applied.
	 *
	 * @since 3.1.0
	 *
	 * @return array
	 */
	protected function get_column_info() {
		// $_column_headers is already set / cached.
		if ( isset( $this->_column_headers ) && is_array( $this->_column_headers ) ) {
			// Back-compat for list tables that have been manually setting $_column_headers for horse reasons.
			// In 4.3, we added a fourth argument for primary column.
			$column_headers = array( array(), array(), array(), $this->get_primary_column_name() );
			foreach ( $this->_column_headers as $key => $value ) {
				$column_headers[ $key ] = $value;
			}

			return $column_headers;
		}

		$columns = get_column_headers( $this->screen );
		$hidden  = get_hidden_columns( $this->screen );

		$sortable_columns = $this->get_sortable_columns();
		/**
		 * Filters the list table sortable columns for a specific screen.
		 *
		 * The dynamic portion of the hook name, `$this->screen->id`, refers
		 * to the ID of the current screen, usually a string.
		 *
		 * @since 3.1.0
		 *
		 * @param array $sortable_columns An array of sortable columns.
		 */
		$_sortable = apply_filters( "manage_{$this->screen->id}_sortable_columns", $sortable_columns );

		$sortable = array();
		foreach ( $_sortable as $id => $data ) {
			if ( empty( $data ) ) {
				continue;
			}

			$data = (array) $data;
			if ( ! isset( $data[1] ) ) {
				$data[1] = false;
			}

			$sortable[ $id ] = $data;
		}

		$primary               = $this->get_primary_column_name();
		$this->_column_headers = array( $columns, $hidden, $sortable, $primary );

		return $this->_column_headers;
	}

	/**
	 * Returns the number of visible columns.
	 *
	 * @since 3.1.0
	 *
	 * @return int
	 */
	public function get_column_count() {
		list ( $columns, $hidden ) = $this->get_column_info();
		$hidden                    = array_intersect( array_keys( $columns ), array_filter( $hidden ) );
		return count( $columns ) - count( $hidden );
	}

	/**
	 * Prints column headers, accounting for hidden and sortable columns.
	 *
	 * @since 3.1.0
	 *
	 * @param bool $with_id Whether to set the ID attribute or not
	 */
	public function print_column_headers( $with_id = true ) {
		list( $columns, $hidden, $sortable, $primary ) = $this->get_column_info();

		$current_url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
		$current_url = remove_query_arg( 'paged', $current_url );

		if ( isset( $_GET['orderby'] ) ) {
			$current_orderby = $_GET['orderby'];
		} else {
			$current_orderby = '';
		}

		if ( isset( $_GET['order'] ) && 'desc' === $_GET['order'] ) {
			$current_order = 'desc';
		} else {
			$current_order = 'asc';
		}

		if ( ! empty( $columns['cb'] ) ) {
			static $cb_counter = 1;
			$columns['cb']     = '' . __( 'Select All' ) . ''
				. '<input id="cb-select-all-' . $cb_counter . '" type="checkbox" />';
			$cb_counter++;
		}

		foreach ( $columns as $column_key => $column_display_name ) {
			$class = array( 'manage-column', "column-$column_key" );

			if ( in_array( $column_key, $hidden, true ) ) {
				$class[] = 'hidden';
			}

			if ( 'cb' === $column_key ) {
				$class[] = 'check-column';
			} elseif ( in_array( $column_key, array( 'posts', 'comments', 'links' ), true ) ) {
				$class[] = 'num';
			}

			if ( $column_key === $primary ) {
				$class[] = 'column-primary';
			}

			if ( isset( $sortable[ $column_key ] ) ) {
				list( $orderby, $desc_first ) = $sortable[ $column_key ];

				if ( $current_orderby === $orderby ) {
					$order = 'asc' === $current_order ? 'desc' : 'asc';

					$class[] = 'sorted';
					$class[] = $current_order;
				} else {
					$order = strtolower( $desc_first );

					if ( ! in_array( $order, array( 'desc', 'asc' ), true ) ) {
						$order = $desc_first ? 'desc' : 'asc';
					}

					$class[] = 'sortable';
					$class[] = 'desc' === $order ? 'asc' : 'desc';
				}

				$column_display_name = sprintf(
					'%s',
					esc_url( add_query_arg( compact( 'orderby', 'order' ), $current_url ) ),
					$column_display_name
				);
			}

			$tag   = ( 'cb' === $column_key ) ? 'td' : 'th';
			$scope = ( 'th' === $tag ) ? 'scope="col"' : '';
			$id    = $with_id ? "id='$column_key'" : '';

			if ( ! empty( $class ) ) {
				$class = "class='" . join( ' ', $class ) . "'";
			}

			echo "<$tag $scope $id $class>$column_display_name</$tag>";
		}
	}

	/**
	 * Displays the table.
	 *
	 * @since 3.1.0
	 */
	public function display() {
		$singular = $this->_args['singular'];

		$this->display_tablenav( 'top' );

		$this->screen->render_screen_reader_content( 'heading_list' );
		?>
<table class="wp-list-table <?php echo implode( ' ', $this->get_table_classes() ); ?>">

		<?php $this->print_column_headers(); ?>

	<tbody id="the-list"
		<?php
		if ( $singular ) {
			echo " data-wp-lists='list:$singular'";
		}
		?>
		>
		<?php $this->display_rows_or_placeholder(); ?>

		<?php $this->print_column_headers( false ); ?>

		<?php
		$this->display_tablenav( 'bottom' );
	}

	/**
	 * Gets a list of CSS classes for the WP_List_Table table tag.
	 *
	 * @since 3.1.0
	 *
	 * @return string[] Array of CSS classes for the table tag.
	 */
	protected function get_table_classes() {
		$mode = get_user_setting( 'posts_list_mode', 'list' );

		$mode_class = esc_attr( 'table-view-' . $mode );

		return array( 'widefat', 'fixed', 'striped', $mode_class, $this->_args['plural'] );
	}

	/**
	 * Generates the table navigation above or below the table
	 *
	 * @since 3.1.0
	 * @param string $which
	 */
	protected function display_tablenav( $which ) {
		if ( 'top' === $which ) {
			wp_nonce_field( 'bulk-' . $this->_args['plural'] );
		}
		?>
	<div class="tablenav <?php echo esc_attr( $which ); ?>">

		<?php if ( $this->has_items() ) : ?>

			<?php $this->bulk_actions( $which ); ?>

			<?php
		endif;
		$this->extra_tablenav( $which );
		$this->pagination( $which );
		?>

		<?php
	}

	/**
	 * Extra controls to be displayed between bulk actions and pagination.
	 *
	 * @since 3.1.0
	 *
	 * @param string $which
	 */
	protected function extra_tablenav( $which ) {}

	/**
	 * Generates the tbody element for the list table.
	 *
	 * @since 3.1.0
	 */
	public function display_rows_or_placeholder() {
		if ( $this->has_items() ) {
			$this->display_rows();
		} else {
			echo '
get_column_count() . '">';
			$this->no_items();
			echo '
';
		}
	}

	/**
	 * Generates the table rows.
	 *
	 * @since 3.1.0
	 */
	public function display_rows() {
		foreach ( $this->items as $item ) {
			$this->single_row( $item );
		}
	}

	/**
	 * Generates content for a single row of the table.
	 *
	 * @since 3.1.0
	 *
	 * @param object $item The current item
	 */
	public function single_row( $item ) {
		echo '
';
		$this->single_row_columns( $item );
		echo '
';
	}

	/**
	 * @param object $item
	 * @param string $column_name
	 */
	protected function column_default( $item, $column_name ) {}

	/**
	 * @param object $item
	 */
	protected function column_cb( $item ) {}

	/**
	 * Generates the columns for a single row of the table.
	 *
	 * @since 3.1.0
	 *
	 * @param object $item The current item.
	 */
	protected function single_row_columns( $item ) {
		list( $columns, $hidden, $sortable, $primary ) = $this->get_column_info();

		foreach ( $columns as $column_name => $column_display_name ) {
			$classes = "$column_name column-$column_name";
			if ( $primary === $column_name ) {
				$classes .= ' has-row-actions column-primary';
			}

			if ( in_array( $column_name, $hidden, true ) ) {
				$classes .= ' hidden';
			}

			// Comments column uses HTML in the display name with screen reader text.
			// Instead of using esc_attr(), we strip tags to get closer to a user-friendly string.
			$data = 'data-colname="' . wp_strip_all_tags( $column_display_name ) . '"';

			$attributes = "class='$classes' $data";

			if ( 'cb' === $column_name ) {
				echo '';
				echo $this->column_cb( $item );
				echo '	';
			} elseif ( method_exists( $this, '_column_' . $column_name ) ) {
				echo call_user_func(
					array( $this, '_column_' . $column_name ),
					$item,
					$classes,
					$data,
					$primary
				);
			} elseif ( method_exists( $this, 'column_' . $column_name ) ) {
				echo "";
				echo call_user_func( array( $this, 'column_' . $column_name ), $item );
				echo $this->handle_row_actions( $item, $column_name, $primary );
				echo '	';
			} else {
				echo "";
				echo $this->column_default( $item, $column_name );
				echo $this->handle_row_actions( $item, $column_name, $primary );
				echo '	';
			}
		}
	}

	/**
	 * Generates and display row actions links for the list table.
	 *
	 * @since 4.3.0
	 *
	 * @param object $item        The item being acted upon.
	 * @param string $column_name Current column name.
	 * @param string $primary     Primary column name.
	 * @return string The row actions HTML, or an empty string
	 *                if the current column is not the primary column.
	 */
	protected function handle_row_actions( $item, $column_name, $primary ) {
		return $column_name === $primary ? '<button type="button" class="toggle-row">' . __( 'Show more details' ) . '</button>' : '';
	}

	/**
	 * Handles an incoming ajax request (called from admin-ajax.php)
	 *
	 * @since 3.1.0
	 */
	public function ajax_response() {
		$this->prepare_items();

		ob_start();
		if ( ! empty( $_REQUEST['no_placeholder'] ) ) {
			$this->display_rows();
		} else {
			$this->display_rows_or_placeholder();
		}

		$rows = ob_get_clean();

		$response = array( 'rows' => $rows );

		if ( isset( $this->_pagination_args['total_items'] ) ) {
			$response['total_items_i18n'] = sprintf(
				/* translators: Number of items. */
				_n( '%s item', '%s items', $this->_pagination_args['total_items'] ),
				number_format_i18n( $this->_pagination_args['total_items'] )
			);
		}
		if ( isset( $this->_pagination_args['total_pages'] ) ) {
			$response['total_pages']      = $this->_pagination_args['total_pages'];
			$response['total_pages_i18n'] = number_format_i18n( $this->_pagination_args['total_pages'] );
		}

		die( wp_json_encode( $response ) );
	}

	/**
	 * Sends required variables to JavaScript land.
	 *
	 * @since 3.1.0
	 */
	public function _js_vars() {
		$args = array(
			'class'  => get_class( $this ),
			'screen' => array(
				'id'   => $this->screen->id,
				'base' => $this->screen->base,
			),
		);

		printf( "\n", wp_json_encode( $args ) );
	}
}


<?php
/**
 * List Table API: WP_Media_List_Table class
 *
 * @package WordPress
 * @subpackage Administration
 * @since 3.1.0
 */

/**
 * Core class used to implement displaying media items in a list table.
 *
 * @since 3.1.0
 * @access private
 *
 * @see WP_List_Table
 */
class WP_Media_List_Table extends WP_List_Table {
	/**
	 * Holds the number of pending comments for each post.
	 *
	 * @since 4.4.0
	 * @var array
	 */
	protected $comment_pending_count = array();

	private $detached;

	private $is_trash;

	/**
	 * Constructor.
	 *
	 * @since 3.1.0
	 *
	 * @see WP_List_Table::__construct() for more information on default arguments.
	 *
	 * @param array $args An associative array of arguments.
	 */
	public function __construct( $args = array() ) {
		$this->detached = ( isset( $_REQUEST['attachment-filter'] ) && 'detached' === $_REQUEST['attachment-filter'] );

		$this->modes = array(
			'list' => __( 'List view' ),
			'grid' => __( 'Grid view' ),
		);

		parent::__construct(
			array(
				'plural' => 'media',
				'screen' => isset( $args['screen'] ) ? $args['screen'] : null,
			)
		);
	}

	/**
	 * @return bool
	 */
	public function ajax_user_can() {
		return current_user_can( 'upload_files' );
	}

	/**
	 * @global string   $mode                  List table view mode.
	 * @global WP_Query $wp_query              WordPress Query object.
	 * @global array    $post_mime_types
	 * @global array    $avail_post_mime_types
	 */
	public function prepare_items() {
		global $mode, $wp_query, $post_mime_types, $avail_post_mime_types;

		$mode = empty( $_REQUEST['mode'] ) ? 'list' : $_REQUEST['mode'];

		// Exclude attachments scheduled for deletion in the next two hours
		// if they are for zip packages for interrupted or failed updates.
		// See File_Upload_Upgrader class.
		$not_in = array();

		foreach ( _get_cron_array() as $cron ) {
			if ( isset( $cron['upgrader_scheduled_cleanup'] ) ) {
				$details = reset( $cron['upgrader_scheduled_cleanup'] );

				if ( ! empty( $details['args'][0] ) ) {
					$not_in[] = (int) $details['args'][0];
				}
			}
		}

		if ( ! empty( $_REQUEST['post__not_in'] ) && is_array( $_REQUEST['post__not_in'] ) ) {
			$not_in = array_merge( array_values( $_REQUEST['post__not_in'] ), $not_in );
		}

		if ( ! empty( $not_in ) ) {
			$_REQUEST['post__not_in'] = $not_in;
		}

		list( $post_mime_types, $avail_post_mime_types ) = wp_edit_attachments_query( $_REQUEST );

		$this->is_trash = isset( $_REQUEST['attachment-filter'] ) && 'trash' === $_REQUEST['attachment-filter'];

		$this->set_pagination_args(
			array(
				'total_items' => $wp_query->found_posts,
				'total_pages' => $wp_query->max_num_pages,
				'per_page'    => $wp_query->query_vars['posts_per_page'],
			)
		);
	}

	/**
	 * @global array $post_mime_types
	 * @global array $avail_post_mime_types
	 * @return array
	 */
	protected function get_views() {
		global $post_mime_types, $avail_post_mime_types;

		$type_links = array();

		$filter = empty( $_GET['attachment-filter'] ) ? '' : $_GET['attachment-filter'];

		$type_links['all'] = sprintf(
			'<option value=""%s>%s</option>',
			selected( $filter, true, false ),
			__( 'All media items' )
		);

		foreach ( $post_mime_types as $mime_type => $label ) {
			if ( ! wp_match_mime_types( $mime_type, $avail_post_mime_types ) ) {
				continue;
			}

			$selected = selected(
				$filter && 0 === strpos( $filter, 'post_mime_type:' ) &&
					wp_match_mime_types( $mime_type, str_replace( 'post_mime_type:', '', $filter ) ),
				true,
				false
			);

			$type_links[ $mime_type ] = sprintf(
				'<option value="post_mime_type:%s"%s>%s</option>',
				esc_attr( $mime_type ),
				$selected,
				$label[0]
			);
		}

		$type_links['detached'] = '<option value="detached"' . ( $this->detached ? ' selected="selected"' : '' ) . '>' . __( 'Unattached' ) . '</option>';

		$type_links['mine'] = sprintf(
			'<option value="mine"%s>%s</option>',
			selected( 'mine' === $filter, true, false ),
			_x( 'Mine', 'media items' )
		);

		if ( $this->is_trash || ( defined( 'MEDIA_TRASH' ) && MEDIA_TRASH ) ) {
			$type_links['trash'] = sprintf(
				'<option value="trash"%s>%s</option>',
				selected( 'trash' === $filter, true, false ),
				_x( 'Trash', 'attachment filter' )
			);
		}

		return $type_links;
	}

	/**
	 * @return array
	 */
	protected function get_bulk_actions() {
		$actions = array();
		if ( MEDIA_TRASH ) {
			if ( $this->is_trash ) {
				$actions['untrash'] = __( 'Restore' );
				$actions['delete']  = __( 'Delete permanently' );
			} else {
				$actions['trash'] = __( 'Move to Trash' );
			}
		} else {
			$actions['delete'] = __( 'Delete permanently' );
		}

		if ( $this->detached ) {
			$actions['attach'] = __( 'Attach' );
		}

		return $actions;
	}

	/**
	 * @param string $which
	 */
	protected function extra_tablenav( $which ) {
		if ( 'bar' !== $which ) {
			return;
		}
		?>

		<?php
		if ( ! $this->is_trash ) {
			$this->months_dropdown( 'attachment' );
		}

		/** This action is documented in wp-admin/includes/class-wp-posts-list-table.php */
		do_action( 'restrict_manage_posts', $this->screen->post_type, $which );

		submit_button( __( 'Filter' ), '', 'filter_action', false, array( 'id' => 'post-query-submit' ) );

		if ( $this->is_trash && current_user_can( 'edit_others_posts' ) && $this->has_items() ) {
			submit_button( __( 'Empty Trash' ), 'apply', 'delete_all', false );
		}
		?>

		<?php
	}

	/**
	 * @return string
	 */
	public function current_action() {
		if ( isset( $_REQUEST['found_post_id'] ) && isset( $_REQUEST['media'] ) ) {
			return 'attach';
		}

		if ( isset( $_REQUEST['parent_post_id'] ) && isset( $_REQUEST['media'] ) ) {
			return 'detach';
		}

		if ( isset( $_REQUEST['delete_all'] ) || isset( $_REQUEST['delete_all2'] ) ) {
			return 'delete_all';
		}

		return parent::current_action();
	}

	/**
	 * @return bool
	 */
	public function has_items() {
		return have_posts();
	}

	/**
	 */
	public function no_items() {
		if ( $this->is_trash ) {
			_e( 'No media files found in Trash.' );
		} else {
			_e( 'No media files found.' );
		}
	}

	/**
	 * Override parent views so we can use the filter bar display.
	 *
	 * @global string $mode List table view mode.
	 */
	public function views() {
		global $mode;

		$views = $this->get_views();

		$this->screen->render_screen_reader_content( 'heading_views' );
		?>

		<?php $this->view_switcher( $mode ); ?>

		<?php _e( 'Filter by type' ); ?>
		<select class="attachment-filters" name="attachment-filter" id="attachment-filter">
			<?php
			if ( ! empty( $views ) ) {
				foreach ( $views as $class => $view ) {
					echo "\t$view\n";
				}
			}
			?>
		</select>

		<?php
		$this->extra_tablenav( 'bar' );

		/** This filter is documented in wp-admin/inclues/class-wp-list-table.php */
		$views = apply_filters( "views_{$this->screen->id}", array() );

		// Back compat for pre-4.0 view links.
		if ( ! empty( $views ) ) {
			echo '
';
			foreach ( $views as $class => $view ) {
				echo "
$view
";
			}
			echo '
';
		}
		?>

		<?php esc_html_e( 'Search' ); ?>
		<input type="search" id="media-search-input" class="search" name="s" value="<?php _admin_search_query(); ?>">

		<?php
	}

	/**
	 * @return array
	 */
	public function get_columns() {
		$posts_columns       = array();
		$posts_columns['cb'] = '<input type="checkbox" />';
		/* translators: Column name. */
		$posts_columns['title']  = _x( 'File', 'column name' );
		$posts_columns['author'] = __( 'Author' );

		$taxonomies = get_taxonomies_for_attachments( 'objects' );
		$taxonomies = wp_filter_object_list( $taxonomies, array( 'show_admin_column' => true ), 'and', 'name' );

		/**
		 * Filters the taxonomy columns for attachments in the Media list table.
		 *
		 * @since 3.5.0
		 *
		 * @param string[] $taxonomies An array of registered taxonomy names to show for attachments.
		 * @param string   $post_type  The post type. Default 'attachment'.
		 */
		$taxonomies = apply_filters( 'manage_taxonomies_for_attachment_columns', $taxonomies, 'attachment' );
		$taxonomies = array_filter( $taxonomies, 'taxonomy_exists' );

		foreach ( $taxonomies as $taxonomy ) {
			if ( 'category' === $taxonomy ) {
				$column_key = 'categories';
			} elseif ( 'post_tag' === $taxonomy ) {
				$column_key = 'tags';
			} else {
				$column_key = 'taxonomy-' . $taxonomy;
			}
			$posts_columns[ $column_key ] = get_taxonomy( $taxonomy )->labels->name;
		}

		/* translators: Column name. */
		if ( ! $this->detached ) {
			$posts_columns['parent'] = _x( 'Uploaded to', 'column name' );
			if ( post_type_supports( 'attachment', 'comments' ) ) {
				$posts_columns['comments'] = '' . __( 'Comments' ) . '';
			}
		}
		/* translators: Column name. */
		$posts_columns['date'] = _x( 'Date', 'column name' );
		/**
		 * Filters the Media list table columns.
		 *
		 * @since 2.5.0
		 *
		 * @param string[] $posts_columns An array of columns displayed in the Media list table.
		 * @param bool     $detached      Whether the list table contains media not attached
		 *                                to any posts. Default true.
		 */
		return apply_filters( 'manage_media_columns', $posts_columns, $this->detached );
	}

	/**
	 * @return array
	 */
	protected function get_sortable_columns() {
		return array(
			'title'    => 'title',
			'author'   => 'author',
			'parent'   => 'parent',
			'comments' => 'comment_count',
			'date'     => array( 'date', true ),
		);
	}

	/**
	 * Handles the checkbox column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_cb( $post ) {
		if ( current_user_can( 'edit_post', $post->ID ) ) {
			?>
			<label class="screen-reader-text" for="cb-select-<?php echo $post->ID; ?>">
				<?php
				/* translators: %s: Attachment title. */
				printf( __( 'Select %s' ), _draft_or_post_title() );
				?>

			<input type="checkbox" name="media[]" id="cb-select-<?php echo $post->ID; ?>" value="<?php echo $post->ID; ?>" />
			<?php
		}
	}

	/**
	 * Handles the title column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_title( $post ) {
		list( $mime ) = explode( '/', $post->post_mime_type );

		$title      = _draft_or_post_title();
		$thumb      = wp_get_attachment_image( $post->ID, array( 60, 60 ), true, array( 'alt' => '' ) );
		$link_start = '';
		$link_end   = '';

		if ( current_user_can( 'edit_post', $post->ID ) && ! $this->is_trash ) {
			$link_start = sprintf(
				'',
				get_edit_post_link( $post->ID ),
				/* translators: %s: Attachment title. */
				esc_attr( sprintf( __( '“%s” (Edit)' ), $title ) )
			);
			$link_end = '';
		}

		$class = $thumb ? ' class="has-media-icon"' : '';
		?>
		<strong<?php echo $class; ?>>
			<?php
			echo $link_start;
			if ( $thumb ) :
				?>
				<span class="media-icon <?php echo sanitize_html_class( $mime . '-icon' ); ?>"><?php echo $thumb; ?>
				<?php
			endif;
			echo $title . $link_end;
			_media_states( $post );
			?>

			<?php _e( 'File name:' ); ?>
			<?php
			$file = get_attached_file( $post->ID );
			echo esc_html( wp_basename( $file ) );
			?>

		<?php
	}

	/**
	 * Handles the author column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_author( $post ) {
		printf(
			'%s',
			esc_url( add_query_arg( array( 'author' => get_the_author_meta( 'ID' ) ), 'upload.php' ) ),
			get_the_author()
		);
	}

	/**
	 * Handles the description column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_desc( $post ) {
		echo has_excerpt() ? $post->post_excerpt : '';
	}

	/**
	 * Handles the date column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_date( $post ) {
		if ( '0000-00-00 00:00:00' === $post->post_date ) {
			$h_time = __( 'Unpublished' );
		} else {
			$time      = get_post_timestamp( $post );
			$time_diff = time() - $time;

			if ( $time && $time_diff > 0 && $time_diff < DAY_IN_SECONDS ) {
				/* translators: %s: Human-readable time difference. */
				$h_time = sprintf( __( '%s ago' ), human_time_diff( $time ) );
			} else {
				$h_time = get_the_time( __( 'Y/m/d' ), $post );
			}
		}

		echo $h_time;
	}

	/**
	 * Handles the parent column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_parent( $post ) {
		$user_can_edit = current_user_can( 'edit_post', $post->ID );

		if ( $post->post_parent > 0 ) {
			$parent = get_post( $post->post_parent );
		} else {
			$parent = false;
		}

		if ( $parent ) {
			$title       = _draft_or_post_title( $post->post_parent );
			$parent_type = get_post_type_object( $parent->post_type );

			if ( $parent_type && $parent_type->show_ui && current_user_can( 'edit_post', $post->post_parent ) ) {
				?>
				<a href="<?php echo get_edit_post_link( $post->post_parent ); ?>">
					<?php echo $title; ?>
								<?php
			} elseif ( $parent_type && current_user_can( 'read_post', $post->post_parent ) ) {
				?>
				<?php echo $title; ?>
									<?php
			} else {
				_e( '(Private post)' );
			}

			if ( $user_can_edit ) :
				$detach_url = add_query_arg(
					array(
						'parent_post_id' => $post->post_parent,
						'media[]'        => $post->ID,
						'_wpnonce'       => wp_create_nonce( 'bulk-' . $this->_args['plural'] ),
					),
					'upload.php'
				);
				printf(
					'
%s',
					$detach_url,
					/* translators: %s: Title of the post the attachment is attached to. */
					esc_attr( sprintf( __( 'Detach from “%s”' ), $title ) ),
					__( 'Detach' )
				);
			endif;
		} else {
			_e( '(Unattached)' );
			?>
			<?php
			if ( $user_can_edit ) {
				$title = _draft_or_post_title( $post->post_parent );
				printf(
					'
%s',
					$post->ID,
					/* translators: %s: Attachment title. */
					esc_attr( sprintf( __( 'Attach “%s” to existing content' ), $title ) ),
					__( 'Attach' )
				);
			}
		}
	}

	/**
	 * Handles the comments column output.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post The current WP_Post object.
	 */
	public function column_comments( $post ) {
		echo '
';

		if ( isset( $this->comment_pending_count[ $post->ID ] ) ) {
			$pending_comments = $this->comment_pending_count[ $post->ID ];
		} else {
			$pending_comments = get_pending_comments_num( $post->ID );
		}

		$this->comments_bubble( $post->ID, $pending_comments );

		echo '
';
	}

	/**
	 * Handles output for the default column.
	 *
	 * @since 4.3.0
	 *
	 * @param WP_Post $post        The current WP_Post object.
	 * @param string  $column_name Current column name.
	 */
	public function column_default( $post, $column_name ) {
		if ( 'categories' === $column_name ) {
			$taxonomy = 'category';
		} elseif ( 'tags' === $column_name ) {
			$taxonomy = 'post_tag';
		} elseif ( 0 === strpos( $column_name, 'taxonomy-' ) ) {
			$taxonomy = substr( $column_name, 9 );
		} else {
			$taxonomy = false;
		}

		if ( $taxonomy ) {
			$terms = get_the_terms( $post->ID, $taxonomy );
			if ( is_array( $terms ) ) {
				$out = array();
				foreach ( $terms as $t ) {
					$posts_in_term_qv             = array();
					$posts_in_term_qv['taxonomy'] = $taxonomy;
					$posts_in_term_qv['term']     = $t->slug;

					$out[] = sprintf(
						'%s',
						esc_url( add_query_arg( $posts_in_term_qv, 'upload.php' ) ),
						esc_html( sanitize_term_field( 'name', $t->name, $t->term_id, $taxonomy, 'display' ) )
					);
				}
				/* translators: Used between list items, there is a space after the comma. */
				echo join( __( ', ' ), $out );
			} else {
				echo '—' . get_taxonomy( $taxonomy )->labels->no_terms . '';
			}

			return;
		}

		/**
		 * Fires for each custom column in the Media list table.
		 *
		 * Custom columns are registered using the {@see 'manage_media_columns'} filter.
		 *
		 * @since 2.5.0
		 *
		 * @param string $column_name Name of the custom column.
		 * @param int    $post_id     Attachment ID.
		 */
		do_action( 'manage_media_custom_column', $column_name, $post->ID );
	}

	/**
	 * @global WP_Post $post Global post object.
	 */
	public function display_rows() {
		global $post, $wp_query;

		$post_ids = wp_list_pluck( $wp_query->posts, 'ID' );
		reset( $wp_query->posts );

		$this->comment_pending_count = get_pending_comments_num( $post_ids );

		add_filter( 'the_title', 'esc_html' );

		while ( have_posts() ) :
			the_post();
			if (
				( $this->is_trash && 'trash' !== $post->post_status )
				|| ( ! $this->is_trash && 'trash' === $post->post_status )
			) {
				continue;
			}
			$post_owner = ( get_current_user_id() == $post->post_author ) ? 'self' : 'other';
			?>
			<tr id="post-<?php echo $post->ID; ?>" class="<?php echo trim( ' author-' . $post_owner . ' status-' . $post->post_status ); ?>">
				<?php $this->single_row_columns( $post ); ?>

			<?php
		endwhile;
	}

	/**
	 * Gets the name of the default primary column.
	 *
	 * @since 4.3.0
	 *
	 * @return string Name of the default primary column, in this case, 'title'.
	 */
	protected function get_default_primary_column_name() {
		return 'title';
	}

	/**
	 * @param WP_Post $post
	 * @param string  $att_title
	 * @return array
	 */
	private function _get_row_actions( $post, $att_title ) {
		$actions = array();

		if ( $this->detached ) {
			if ( current_user_can( 'edit_post', $post->ID ) ) {
				$actions['edit'] = sprintf(
					'%s',
					get_edit_post_link( $post->ID ),
					/* translators: %s: Attachment title. */
					esc_attr( sprintf( __( 'Edit “%s”' ), $att_title ) ),
					__( 'Edit' )
				);
			}
			if ( current_user_can( 'delete_post', $post->ID ) ) {
				if ( EMPTY_TRASH_DAYS && MEDIA_TRASH ) {
					$actions['trash'] = sprintf(
						'%s',
						wp_nonce_url( "post.php?action=trash&post=$post->ID", 'trash-post_' . $post->ID ),
						/* translators: %s: Attachment title. */
						esc_attr( sprintf( __( 'Move “%s” to the Trash' ), $att_title ) ),
						_x( 'Trash', 'verb' )
					);
				} else {
					$delete_ays        = ! MEDIA_TRASH ? " onclick='return showNotice.warn();'" : '';
					$actions['delete'] = sprintf(
						'%s',
						wp_nonce_url( "post.php?action=delete&post=$post->ID", 'delete-post_' . $post->ID ),
						$delete_ays,
						/* translators: %s: Attachment title. */
						esc_attr( sprintf( __( 'Delete “%s” permanently' ), $att_title ) ),
						__( 'Delete Permanently' )
					);
				}
			}
			$actions['view'] = sprintf(
				'%s',
				get_permalink( $post->ID ),
				/* translators: %s: Attachment title. */
				esc_attr( sprintf( __( 'View “%s”' ), $att_title ) ),
				__( 'View' )
			);

			if ( current_user_can( 'edit_post', $post->ID ) ) {
				$actions['attach'] = sprintf(
					'%s',
					$post->ID,
					/* translators: %s: Attachment title. */
					esc_attr( sprintf( __( 'Attach “%s” to existing content' ), $att_title ) ),
					__( 'Attach' )
				);
			}
		} else {
			if ( current_user_can( 'edit_post', $post->ID ) && ! $this->is_trash ) {
				$actions['edit'] = sprintf(
					'%s',
					get_edit_post_link( $post->ID ),
					/* translators: %s: Attachment title. */
					esc_attr( sprintf( __( 'Edit “%s”' ), $att_title ) ),
					__( 'Edit' )
				);
			}
			if ( current_user_can( 'delete_post', $post->ID ) ) {
				if ( $this->is_trash ) {
					$actions['untrash'] = sprintf(
						'%s',
						wp_nonce_url( "post.php?action=untrash&post=$post->ID", 'untrash-post_' . $post->ID ),
						/* translators: %s: Attachment title. */
						esc_attr( sprintf( __( 'Restore “%s” from the Trash' ), $att_title ) ),
						__( 'Restore' )
					);
				} elseif ( EMPTY_TRASH_DAYS && MEDIA_TRASH ) {
					$actions['trash'] = sprintf(
						'%s',
						wp_nonce_url( "post.php?action=trash&post=$post->ID", 'trash-post_' . $post->ID ),
						/* translators: %s: Attachment title. */
						esc_attr( sprintf( __( 'Move “%s” to the Trash' ), $att_title ) ),
						_x( 'Trash', 'verb' )
					);
				}
				if ( $this->is_trash || ! EMPTY_TRASH_DAYS || ! MEDIA_TRASH ) {
					$delete_ays        = ( ! $this->is_trash && ! MEDIA_TRASH ) ? " onclick='return showNotice.warn();'" : '';
					$actions['delete'] = sprintf(
						'%s',
						wp_nonce_url( "post.php?action=delete&post=$post->ID", 'delete-post_' . $post->ID ),
						$delete_ays,
						/* translators: %s: Attachment title. */
						esc_attr( sprintf( __( 'Delete “%s” permanently' ), $att_title ) ),
						__( 'Delete Permanently' )
					);
				}
			}
			if ( ! $this->is_trash ) {
				$actions['view'] = sprintf(
					'%s',
					get_permalink( $post->ID ),
					/* translators: %s: Attachment title. */
					esc_attr( sprintf( __( 'View “%s”' ), $att_title ) ),
					__( 'View' )
				);
			}
		}

		/**
		 * Filters the action links for each attachment in the Media list table.
		 *
		 * @since 2.8.0
		 *
		 * @param string[] $actions  An array of action links for each attachment.
		 *                           Default 'Edit', 'Delete Permanently', 'View'.
		 * @param WP_Post  $post     WP_Post object for the current attachment.
		 * @param bool     $detached Whether the list table contains media not attached
		 *                           to any posts. Default true.
		 */
		return apply_filters( 'media_row_actions', $actions, $post, $this->detached );
	}

	/**
	 * Generates and displays row action links.
	 *
	 * @since 4.3.0
	 *
	 * @param object $post        Attachment being acted upon.
	 * @param string $column_name Current column name.
	 * @param string $primary     Primary column name.
	 * @return string Row actions output for media attachments, or an empty string
	 *                if the current column is not the primary column.
	 */
	protected function handle_row_actions( $post, $column_name, $primary ) {
		if ( $primary !== $column_name ) {
			return '';
		}

		$att_title = _draft_or_post_title();

		return $this->row_actions( $this->_get_row_actions( $post, $att_title ) );
	}
}


<?php
/**
 * List Table API: WP_MS_Sites_List_Table class
 *
 * @package WordPress
 * @subpackage Administration
 * @since 3.1.0
 */

/**
 * Core class used to implement displaying sites in a list table for the network admin.
 *
 * @since 3.1.0
 * @access private
 *
 * @see WP_List_Table
 */
class WP_MS_Sites_List_Table extends WP_List_Table {

	/**
	 * Site status list.
	 *
	 * @since 4.3.0
	 * @var array
	 */
	public $status_list;

	/**
	 * Constructor.
	 *
	 * @since 3.1.0
	 *
	 * @see WP_List_Table::__construct() for more information on default arguments.
	 *
	 * @param array $args An associative array of arguments.
	 */
	public function __construct( $args = array() ) {
		$this->status_list = array(
			'archived' => array( 'site-archived', __( 'Archived' ) ),
			'spam'     => array( 'site-spammed', _x( 'Spam', 'site' ) ),
			'deleted'  => array( 'site-deleted', __( 'Deleted' ) ),
			'mature'   => array( 'site-mature', __( 'Mature' ) ),
		);

		parent::__construct(
			array(
				'plural' => 'sites',
				'screen' => isset( $args['screen'] ) ? $args['screen'] : null,
			)
		);
	}

	/**
	 * @return bool
	 */
	public function ajax_user_can() {
		return current_user_can( 'manage_sites' );
	}

	/**
	 * Prepares the list of sites for display.
	 *
	 * @since 3.1.0
	 *
	 * @global string $mode List table view mode.
	 * @global string $s
	 * @global wpdb   $wpdb WordPress database abstraction object.
	 */
	public function prepare_items() {
		global $mode, $s, $wpdb;

		if ( ! empty( $_REQUEST['mode'] ) ) {
			$mode = 'excerpt' === $_REQUEST['mode'] ? 'excerpt' : 'list';
			set_user_setting( 'sites_list_mode', $mode );
		} else {
			$mode = get_user_setting( 'sites_list_mode', 'list' );
		}

		$per_page = $this->get_items_per_page( 'sites_network_per_page' );

		$pagenum = $this->get_pagenum();

		$s    = isset( $_REQUEST['s'] ) ? wp_unslash( trim( $_REQUEST['s'] ) ) : '';
		$wild = '';
		if ( false !== strpos( $s, '*' ) ) {
			$wild = '*';
			$s    = trim( $s, '*' );
		}

		/*
		 * If the network is large and a search is not being performed, show only
		 * the latest sites with no paging in order to avoid expensive count queries.
		 */
		if ( ! $s && wp_is_large_network() ) {
			if ( ! isset( $_REQUEST['orderby'] ) ) {
				$_GET['orderby']     = '';
				$_REQUEST['orderby'] = '';
			}
			if ( ! isset( $_REQUEST['order'] ) ) {
				$_GET['order']     = 'DESC';
				$_REQUEST['order'] = 'DESC';
			}
		}

		$args = array(
			'number'     => intval( $per_page ),
			'offset'     => intval( ( $pagenum - 1 ) * $per_page ),
			'network_id' => get_current_network_id(),
		);

		if ( empty( $s ) ) {
			// Nothing to do.
		} elseif ( preg_match( '/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/', $s ) ||
					preg_match( '/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.?$/', $s ) ||
					preg_match( '/^[0-9]{1,3}\.[0-9]{1,3}\.?$/', $s ) ||
					preg_match( '/^[0-9]{1,3}\.$/', $s ) ) {
			// IPv4 address.
			$sql          = $wpdb->prepare( "SELECT blog_id FROM {$wpdb->registration_log} WHERE {$wpdb->registration_log}.IP LIKE %s", $wpdb->esc_like( $s ) . ( ! empty( $wild ) ? '%' : '' ) );
			$reg_blog_ids = $wpdb->get_col( $sql );

			if ( $reg_blog_ids ) {
				$args['site__in'] = $reg_blog_ids;
			}
		} elseif ( is_numeric( $s ) && empty( $wild ) ) {
			$args['ID'] = $s;
		} else {
			$args['search'] = $s;

			if ( ! is_subdomain_install() ) {
				$args['search_columns'] = array( 'path' );
			}
		}

		$order_by = isset( $_REQUEST['orderby'] ) ? $_REQUEST['orderby'] : '';
		if ( 'registered' === $order_by ) {
			// 'registered' is a valid field name.
		} elseif ( 'lastupdated' === $order_by ) {
			$order_by = 'last_updated';
		} elseif ( 'blogname' === $order_by ) {
			if ( is_subdomain_install() ) {
				$order_by = 'domain';
			} else {
				$order_by = 'path';
			}
		} elseif ( 'blog_id' === $order_by ) {
			$order_by = 'id';
		} elseif ( ! $order_by ) {
			$order_by = false;
		}

		$args['orderby'] = $order_by;

		if ( $order_by ) {
			$args['order'] = ( isset( $_REQUEST['order'] ) && 'DESC' === strtoupper( $_REQUEST['order'] ) ) ? 'DESC' : 'ASC';
		}

		if ( wp_is_large_network() ) {
			$args['no_found_rows'] = true;
		} else {
			$args['no_found_rows'] = false;
		}

		// Take into account the role the user has selected.
		$status = isset( $_REQUEST['status'] ) ? wp_unslash( trim( $_REQUEST['status'] ) ) : '';
		if ( in_array( $status, array( 'public', 'archived', 'mature', 'spam', 'deleted' ), true ) ) {
			$args[ $status ] = 1;
		}

		/**
		 * Filters the arguments for the site query in the sites list table.
		 *
		 * @since 4.6.0
		 *
		 * @param array $args An array of get_sites() arguments.
		 */
		$args = apply_filters( 'ms_sites_list_table_query_args', $args );

		$_sites = get_sites( $args );
		if ( is_array( $_sites ) ) {
			update_site_cache( $_sites );

			$this->items = array_slice( $_sites, 0, $per_page );
		}

		$total_sites = get_sites(
			array_merge(
				$args,
				array(
					'count'  => true,
					'offset' => 0,
					'number' => 0,
				)
			)
		);

		$this->set_pagination_args(
			array(
				'total_items' => $total_sites,
				'per_page'    => $per_page,
			)
		);
	}

	/**
	 */
	public function no_items() {
		_e( 'No sites found.' );
	}

	/**
	 * Gets links to filter sites by status.
	 *
	 * @since 5.3.0
	 *
	 * @return array
	 */
	protected function get_views() {
		$counts = wp_count_sites();

		$statuses = array(
			/* translators: %s: Number of sites. */
			'all'      => _nx_noop(
				'All (%s)',
				'All (%s)',
				'sites'
			),

			/* translators: %s: Number of sites. */
			'public'   => _n_noop(
				'Public (%s)',
				'Public (%s)'
			),

			/* translators: %s: Number of sites. */
			'archived' => _n_noop(
				'Archived (%s)',
				'Archived (%s)'
			),

			/* translators: %s: Number of sites. */
			'mature'   => _n_noop(
				'Mature (%s)',
				'Mature (%s)'
			),

			/* translators: %s: Number of sites. */
			'spam'     => _nx_noop(
				'Spam (%s)',
				'Spam (%s)',
				'sites'
			),

			/* translators: %s: Number of sites. */
			'deleted'  => _n_noop(
				'Deleted (%s)',
				'Deleted (%s)'
			),
		);

		$view_links       = array();
		$requested_status = isset( $_REQUEST['status'] ) ? wp_unslash( trim( $_REQUEST['status'] ) ) : '';
		$url              = 'sites.php';

		foreach ( $statuses as $status => $label_count ) {
			$current_link_attributes = $requested_status === $status || ( '' === $requested_status && 'all' === $status )
				? ' class="current" aria-current="page"'
				: '';
			if ( (int) $counts[ $status ] > 0 ) {
				$label    = sprintf( translate_nooped_plural( $label_count, $counts[ $status ] ), number_format_i18n( $counts[ $status ] ) );
				$full_url = 'all' === $status ? $url : add_query_arg( 'status', $status, $url );

				$view_links[ $status ] = sprintf(
					'%3$s',
					esc_url( $full_url ),
					$current_link_attributes,
					$label
				);
			}
		}

		return $view_links;
	}

	/**
	 * @return array
	 */
	protected function get_bulk_actions() {
		$actions = array();
		if ( current_user_can( 'delete_sites' ) ) {
			$actions['delete'] = __( 'Delete' );
		}
		$actions['spam']    = _x( 'Mark as spam', 'site' );
		$actions['notspam'] = _x( 'Not spam', 'site' );

		return $actions;
	}

	/**
	 * @global string $mode List table view mode.
	 *
	 * @param string $which The location of the pagination nav markup: 'top' or 'bottom'.
	 */
	protected function pagination( $which ) {
		global $mode;

		parent::pagination( $which );

		if ( 'top' === $which ) {
			$this->view_switcher( $mode );
		}
	}

	/**
	 * Extra controls to be displayed between bulk actions and pagination.
	 *
	 * @since 5.3.0
	 *
	 * @param string $which The location of the extra table nav markup: 'top' or 'bottom'.
	 */
	protected function extra_tablenav( $which ) {
		?>

		<?php
		if ( 'top' === $which ) {
			ob_start();

			/**
			 * Fires before the Filter button on the MS sites list table.
			 *
			 * @since 5.3.0
			 *
			 * @param string $which The location of the extra table nav markup: 'top' or 'bottom'.
			 */
			do_action( 'restrict_manage_sites', $which );
			$output = ob_get_clean();
			if ( ! empty( $output ) ) {
				echo $output;
				submit_button( __( 'Filter' ), '', 'filter_action', false, array( 'id' => 'site-query-submit' ) );
			}
		}
		?>

		<?php
		/**
		 * Fires immediately following the closing "actions" div in the tablenav for the
		 * MS sites list table.
		 *
		 * @since 5.3.0
		 *
		 * @param string $which The location of the extra table nav markup: 'top' or 'bottom'.
		 */
		do_action( 'manage_sites_extra_tablenav', $which );
	}

	/**
	 * @return array
	 */
	public function get_columns() {
		$sites_columns = array(
			'cb'          => '<input type="checkbox" />',
			'blogname'    => __( 'URL' ),
			'lastupdated' => __( 'Last Updated' ),
			'registered'  => _x( 'Registered', 'site' ),
			'users'       => __( 'Users' ),
		);

		if ( has_filter( 'wpmublogsaction' ) ) {
			$sites_columns['plugins'] = __( 'Actions' );
		}

		/**
		 * Filters the displayed site columns in Sites list table.
		 *
		 * @since MU (3.0.0)
		 *
		 * @param string[] $sites_columns An array of displayed site columns. Default 'cb',
		 *                               'blogname', 'lastupdated', 'registered', 'users'.
		 */
		return apply_filters( 'wpmu_blogs_columns', $sites_columns );
	}

	/**
	 * @return array
	 */
	protected function get_sortable_columns() {
		return array(
			'blogname'    => 'blogname',
			'lastupdated' => 'lastupdated',
			'registered'  => 'blog_id',
		);
	}

	/**
	 * Handles the checkbox column output.
	 *
	 * @since 4.3.0
	 *
	 * @param array $blog Current site.
	 */
	public function column_cb( $blog ) {
		if ( ! is_main_site( $blog['blog_id'] ) ) :
			$blogname = untrailingslashit( $blog['domain'] . $blog['path'] );
			?>
			<label class="screen-reader-text" for="blog_<?php echo $blog['blog_id']; ?>">
				<?php
				/* translators: %s: Site URL. */
				printf( __( 'Select %s' ), $blogname );
				?>

			<input type="checkbox" id="blog_<?php echo $blog['blog_id']; ?>" name="allblogs[]" value="<?php echo esc_attr( $blog['blog_id'] ); ?>" />
			<?php
		endif;
	}

	/**
	 * Handles the ID column output.
	 *
	 * @since 4.4.0
	 *
	 * @param array $blog Current site.
	 */
	public function column_id( $blog ) {
		echo $blog['blog_id'];
	}

	/**
	 * Handles the site name column output.
	 *
	 * @since 4.3.0
	 *
	 * @global string $mode List table view mode.
	 *
	 * @param array $blog Current site.
	 */
	public function column_blogname( $blog ) {
		global $mode;

		$blogname = untrailingslashit( $blog['domain'] . $blog['path'] );

		?>

			<a href="<?php echo esc_url( network_admin_url( 'site-info.php?id=' . $blog['blog_id'] ) ); ?>" class="edit"><?php echo $blogname; ?>
			<?php $this->site_states( $blog ); ?>

		<?php
		if ( 'list' !== $mode ) {
			switch_to_blog( $blog['blog_id'] );
			echo '
';
			printf(
				/* translators: 1: Site title, 2: Site tagline. */
				__( '%1$s – %2$s' ),
				get_option( 'blogname' ),
				'' . get_option( 'blogdescription' ) . ''
			);
			echo '
';
			restore_current_blog();
		}
	}

	/**
	 * Handles the lastupdated column output.
	 *
	 * @since 4.3.0
	 *
	 * @global string $mode List table view mode.
	 *
	 * @param array $blog Current site.
	 */
	public function column_lastupdated( $blog ) {
		global $mode;

		if ( 'list' === $mode ) {
			$date = __( 'Y/m/d' );
		} else {
			$date = __( 'Y/m/d g:i:s a' );
		}

		echo ( '0000-00-00 00:00:00' === $blog['last_updated'] ) ? __( 'Never' ) : mysql2date( $date, $blog['last_updated'] );
	}

	/**
	 * Handles the registered column output.
	 *
	 * @since 4.3.0
	 *
	 * @global string $mode List table view mode.
	 *
	 * @param array $blog Current site.
	 */
	public function column_registered( $blog ) {
		global $mode;

		if ( 'list' === $mode ) {
			$date = __( 'Y/m/d' );
		} else {
			$date = __( 'Y/m/d g:i:s a' );
		}

		if ( '0000-00-00 00:00:00' === $blog['registered'] ) {
			echo '—';
		} else {
			echo mysql2date( $date, $blog['registered'] );
		}
	}

	/**
	 * Handles the users column output.
	 *
	 * @since 4.3.0
	 *
	 * @param array $blog Current site.
	 */
	public function column_users( $blog ) {
		$user_count = wp_cache_get( $blog['blog_id'] . '_user_count', 'blog-details' );
		if ( ! $user_count ) {
			$blog_users = new WP_User_Query(
				array(
					'blog_id'     => $blog['blog_id'],
					'fields'      => 'ID',
					'number'      => 1,
					'count_total' => true,
				)
			);
			$user_count = $blog_users->get_total();
			wp_cache_set( $blog['blog_id'] . '_user_count', $user_count, 'blog-details', 12 * HOUR_IN_SECONDS );
		}

		printf(
			'%s',
			esc_url( network_admin_url( 'site-users.php?id=' . $blog['blog_id'] ) ),
			number_format_i18n( $user_count )
		);
	}

	/**
	 * Handles the plugins column output.
	 *
	 * @since 4.3.0
	 *
	 * @param array $blog Current site.
	 */
	public function column_plugins( $blog ) {
		if ( has_filter( 'wpmublogsaction' ) ) {
			/**
			 * Fires inside the auxiliary 'Actions' column of the Sites list table.
			 *
			 * By default this column is hidden unless something is hooked to the action.
			 *
			 * @since MU (3.0.0)
			 *
			 * @param int $blog_id The site ID.
			 */
			do_action( 'wpmublogsaction', $blog['blog_id'] );
		}
	}

	/**
	 * Handles output for the default column.
	 *
	 * @since 4.3.0
	 *
	 * @param array  $blog        Current site.
	 * @param string $column_name Current column name.
	 */
	public function column_default( $blog, $column_name ) {
		/**
		 * Fires for each registered custom column in the Sites list table.
		 *
		 * @since 3.1.0
		 *
		 * @param string $column_name The name of the column to display.
		 * @param int    $blog_id     The site ID.
		 */
		do_action( 'manage_sites_custom_column', $column_name, $blog['blog_id'] );
	}

	/**
	 * @global string $mode List table view mode.
	 */
	public function display_rows() {
		foreach ( $this->items as $blog ) {
			$blog  = $blog->to_array();
			$class = '';
			reset( $this->status_list );

			foreach ( $this->status_list as $status => $col ) {
				if ( 1 == $blog[ $status ] ) {
					$class = " class='{$col[0]}'";
				}
			}

			echo "
";

			$this->single_row_columns( $blog );

			echo '
';
		}
	}

	/**
	 * Maybe output comma-separated site states.
	 *
	 * @since 5.3.0
	 *
	 * @param array $site
	 */
	protected function site_states( $site ) {
		$site_states = array();

		// $site is still an array, so get the object.
		$_site = WP_Site::get_instance( $site['blog_id'] );

		if ( is_main_site( $_site->id ) ) {
			$site_states['main'] = __( 'Main' );
		}

		reset( $this->status_list );

		$site_status = isset( $_REQUEST['status'] ) ? wp_unslash( trim( $_REQUEST['status'] ) ) : '';
		foreach ( $this->status_list as $status => $col ) {
			if ( ( 1 === intval( $_site->{$status} ) ) && ( $site_status !== $status ) ) {
				$site_states[ $col[0] ] = $col[1];
			}
		}

		/**
		 * Filter the default site display states for items in the Sites list table.
		 *
		 * @since 5.3.0
		 *
		 * @param array $site_states An array of site states. Default 'Main',
		 *                           'Archived', 'Mature', 'Spam', 'Deleted'.
		 * @param WP_Site $site The current site object.
		 */
		$site_states = apply_filters( 'display_site_states', $site_states, $_site );

		if ( ! empty( $site_states ) ) {
			$state_count = count( $site_states );
			$i           = 0;
			echo ' — ';
			foreach ( $site_states as $state ) {
				++$i;
				( $i == $state_count ) ? $sep = '' : $sep = ', ';
				echo "{$state}{$sep}";
			}
		}
	}

	/**
	 * Gets the name of the default primary column.
	 *
	 * @since 4.3.0
	 *
	 * @return string Name of the default primary column, in this case, 'blogname'.
	 */
	protected function get_default_primary_column_name() {
		return 'blogname';
	}

	/**
	 * Generates and displays row action links.
	 *
	 * @since 4.3.0
	 *
	 * @param object $blog        Site being acted upon.
	 * @param string $column_name Current column name.
	 * @param string $primary     Primary column name.
	 * @return string Row actions output for sites in Multisite, or an empty string
	 *                if the current column is not the primary column.
	 */
	protected function handle_row_actions( $blog, $column_name, $primary ) {
		if ( $primary !== $column_name ) {
			return '';
		}

		$blogname = untrailingslashit( $blog['domain'] . $blog['path'] );

		// Preordered.
		$actions = array(
			'edit'       => '',
			'backend'    => '',
			'activate'   => '',
			'deactivate' => '',
			'archive'    => '',
			'unarchive'  => '',
			'spam'       => '',
			'unspam'     => '',
			'delete'     => '',
			'visit'      => '',
		);

		$actions['edit']    = '' . __( 'Edit' ) . '';
		$actions['backend'] = "" . __( 'Dashboard' ) . '';
		if ( get_network()->site_id != $blog['blog_id'] ) {
			if ( '1' == $blog['deleted'] ) {
				$actions['activate'] = '' . __( 'Activate' ) . '';
			} else {
				$actions['deactivate'] = '' . __( 'Deactivate' ) . '';
			}

			if ( '1' == $blog['archived'] ) {
				$actions['unarchive'] = '' . __( 'Unarchive' ) . '';
			} else {
				$actions['archive'] = '' . _x( 'Archive', 'verb; site' ) . '';
			}

			if ( '1' == $blog['spam'] ) {
				$actions['unspam'] = '' . _x( 'Not Spam', 'site' ) . '';
			} else {
				$actions['spam'] = '' . _x( 'Spam', 'site' ) . '';
			}

			if ( current_user_can( 'delete_site', $blog['blog_id'] ) ) {
				$actions['delete'] = '' . __( 'Delete' ) . '';
			}
		}

		$actions['visit'] = "" . __( 'Visit' ) . '';

		/**
		 * Filters the action links displayed for each site in the Sites list table.
		 *
		 * The 'Edit', 'Dashboard', 'Delete', and 'Visit' links are displayed by
		 * default for each site. The site's status determines whether to show the
		 * 'Activate' or 'Deactivate' link, 'Unarchive' or 'Archive' links, and
		 * 'Not Spam' or 'Spam' link for each site.
		 *
		 * @since 3.1.0
		 *
		 * @param string[] $actions  An array of action links to be displayed.
		 * @param int      $blog_id  The site ID.
		 * @param string   $blogname Site path, formatted depending on whether it is a sub-domain
		 *                           or subdirectory multisite installation.
		 */
		$actions = apply_filters( 'manage_sites_action_links', array_filter( $actions ), $blog['blog_id'], $blogname );

		return $this->row_actions( $actions );
	}
}