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

/**
 * Core class used to implement displaying terms in a list table.
 *
 * @since 3.1.0
 * @access private
 *
 * @see WP_List_Table
 */
class WP_Terms_List_Table extends WP_List_Table {

	public $callback_args;

	private $level;

	/**
	 * Constructor.
	 *
	 * @since 3.1.0
	 *
	 * @see WP_List_Table::__construct() for more information on default arguments.
	 *
	 * @global string $post_type
	 * @global string $taxonomy
	 * @global string $action
	 * @global object $tax
	 *
	 * @param array $args An associative array of arguments.
	 */
	public function __construct( $args = array() ) {
		global $post_type, $taxonomy, $action, $tax;

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

		$action    = $this->screen->action;
		$post_type = $this->screen->post_type;
		$taxonomy  = $this->screen->taxonomy;

		if ( empty( $taxonomy ) ) {
			$taxonomy = 'post_tag';
		}

		if ( ! taxonomy_exists( $taxonomy ) ) {
			wp_die( __( 'Invalid taxonomy.' ) );
		}

		$tax = get_taxonomy( $taxonomy );

		// @todo Still needed? Maybe just the show_ui part.
		if ( empty( $post_type ) || ! in_array( $post_type, get_post_types( array( 'show_ui' => true ) ), true ) ) {
			$post_type = 'post';
		}

	}

	/**
	 * @return bool
	 */
	public function ajax_user_can() {
		return current_user_can( get_taxonomy( $this->screen->taxonomy )->cap->manage_terms );
	}

	/**
	 */
	public function prepare_items() {
		$tags_per_page = $this->get_items_per_page( 'edit_' . $this->screen->taxonomy . '_per_page' );

		if ( 'post_tag' === $this->screen->taxonomy ) {
			/**
			 * Filters the number of terms displayed per page for the Tags list table.
			 *
			 * @since 2.8.0
			 *
			 * @param int $tags_per_page Number of tags to be displayed. Default 20.
			 */
			$tags_per_page = apply_filters( 'edit_tags_per_page', $tags_per_page );

			/**
			 * Filters the number of terms displayed per page for the Tags list table.
			 *
			 * @since 2.7.0
			 * @deprecated 2.8.0 Use {@see 'edit_tags_per_page'} instead.
			 *
			 * @param int $tags_per_page Number of tags to be displayed. Default 20.
			 */
			$tags_per_page = apply_filters_deprecated( 'tagsperpage', array( $tags_per_page ), '2.8.0', 'edit_tags_per_page' );
		} elseif ( 'category' === $this->screen->taxonomy ) {
			/**
			 * Filters the number of terms displayed per page for the Categories list table.
			 *
			 * @since 2.8.0
			 *
			 * @param int $tags_per_page Number of categories to be displayed. Default 20.
			 */
			$tags_per_page = apply_filters( 'edit_categories_per_page', $tags_per_page );
		}

		$search = ! empty( $_REQUEST['s'] ) ? trim( wp_unslash( $_REQUEST['s'] ) ) : '';

		$args = array(
			'search' => $search,
			'page'   => $this->get_pagenum(),
			'number' => $tags_per_page,
		);

		if ( ! empty( $_REQUEST['orderby'] ) ) {
			$args['orderby'] = trim( wp_unslash( $_REQUEST['orderby'] ) );
		}

		if ( ! empty( $_REQUEST['order'] ) ) {
			$args['order'] = trim( wp_unslash( $_REQUEST['order'] ) );
		}

		$this->callback_args = $args;

		$this->set_pagination_args(
			array(
				'total_items' => wp_count_terms( $this->screen->taxonomy, compact( 'search' ) ),
				'per_page'    => $tags_per_page,
			)
		);
	}

	/**
	 * @return bool
	 */
	public function has_items() {
		// @todo Populate $this->items in prepare_items().
		return true;
	}

	/**
	 */
	public function no_items() {
		echo get_taxonomy( $this->screen->taxonomy )->labels->not_found;
	}

	/**
	 * @return array
	 */
	protected function get_bulk_actions() {
		$actions = array();

		if ( current_user_can( get_taxonomy( $this->screen->taxonomy )->cap->delete_terms ) ) {
			$actions['delete'] = __( 'Delete' );
		}

		return $actions;
	}

	/**
	 * @return string
	 */
	public function current_action() {
		if ( isset( $_REQUEST['action'] ) && isset( $_REQUEST['delete_tags'] ) && ( 'delete' === $_REQUEST['action'] || 'delete' === $_REQUEST['action2'] ) ) {
			return 'bulk-delete';
		}

		return parent::current_action();
	}

	/**
	 * @return array
	 */
	public function get_columns() {
		$columns = array(
			'cb'          => '<input type="checkbox" />',
			'name'        => _x( 'Name', 'term name' ),
			'description' => __( 'Description' ),
			'slug'        => __( 'Slug' ),
		);

		if ( 'link_category' === $this->screen->taxonomy ) {
			$columns['links'] = __( 'Links' );
		} else {
			$columns['posts'] = _x( 'Count', 'Number/count of items' );
		}

		return $columns;
	}

	/**
	 * @return array
	 */
	protected function get_sortable_columns() {
		return array(
			'name'        => 'name',
			'description' => 'description',
			'slug'        => 'slug',
			'posts'       => 'count',
			'links'       => 'count',
		);
	}

	/**
	 */
	public function display_rows_or_placeholder() {
		$taxonomy = $this->screen->taxonomy;

		$args = wp_parse_args(
			$this->callback_args,
			array(
				'taxonomy'   => $taxonomy,
				'page'       => 1,
				'number'     => 20,
				'search'     => '',
				'hide_empty' => 0,
			)
		);

		$page = $args['page'];

		// Set variable because $args['number'] can be subsequently overridden.
		$number = $args['number'];

		$offset         = ( $page - 1 ) * $number;
		$args['offset'] = $offset;

		// Convert it to table rows.
		$count = 0;

		if ( is_taxonomy_hierarchical( $taxonomy ) && ! isset( $args['orderby'] ) ) {
			// We'll need the full set of terms then.
			$args['number'] = 0;
			$args['offset'] = $args['number'];
		}

		$terms = get_terms( $args );

		if ( empty( $terms ) || ! is_array( $terms ) ) {
			echo '
get_column_count() . '">';
			$this->no_items();
			echo '
';
			return;
		}

		if ( is_taxonomy_hierarchical( $taxonomy ) && ! isset( $args['orderby'] ) ) {
			if ( ! empty( $args['search'] ) ) {// Ignore children on searches.
				$children = array();
			} else {
				$children = _get_term_hierarchy( $taxonomy );
			}

			/*
			 * Some funky recursion to get the job done (paging & parents mainly) is contained within.
			 * Skip it for non-hierarchical taxonomies for performance sake.
			 */
			$this->_rows( $taxonomy, $terms, $children, $offset, $number, $count );
		} else {
			foreach ( $terms as $term ) {
				$this->single_row( $term );
			}
		}
	}

	/**
	 * @param string $taxonomy
	 * @param array  $terms
	 * @param array  $children
	 * @param int    $start
	 * @param int    $per_page
	 * @param int    $count
	 * @param int    $parent
	 * @param int    $level
	 */
	private function _rows( $taxonomy, $terms, &$children, $start, $per_page, &$count, $parent = 0, $level = 0 ) {

		$end = $start + $per_page;

		foreach ( $terms as $key => $term ) {

			if ( $count >= $end ) {
				break;
			}

			if ( $term->parent != $parent && empty( $_REQUEST['s'] ) ) {
				continue;
			}

			// If the page starts in a subtree, print the parents.
			if ( $count == $start && $term->parent > 0 && empty( $_REQUEST['s'] ) ) {
				$my_parents = array();
				$parent_ids = array();
				$p          = $term->parent;
				while ( $p ) {
					$my_parent    = get_term( $p, $taxonomy );
					$my_parents[] = $my_parent;
					$p            = $my_parent->parent;
					if ( in_array( $p, $parent_ids, true ) ) { // Prevent parent loops.
						break;
					}
					$parent_ids[] = $p;
				}
				unset( $parent_ids );

				$num_parents = count( $my_parents );
				while ( $my_parent = array_pop( $my_parents ) ) {
					echo "\t";
					$this->single_row( $my_parent, $level - $num_parents );
					$num_parents--;
				}
			}

			if ( $count >= $start ) {
				echo "\t";
				$this->single_row( $term, $level );
			}

			++$count;

			unset( $terms[ $key ] );

			if ( isset( $children[ $term->term_id ] ) && empty( $_REQUEST['s'] ) ) {
				$this->_rows( $taxonomy, $terms, $children, $start, $per_page, $count, $term->term_id, $level + 1 );
			}
		}
	}

	/**
	 * @global string $taxonomy
	 * @param WP_Term $tag   Term object.
	 * @param int     $level
	 */
	public function single_row( $tag, $level = 0 ) {
		global $taxonomy;
		$tag = sanitize_term( $tag, $taxonomy );

		$this->level = $level;

		if ( $tag->parent ) {
			$count = count( get_ancestors( $tag->term_id, $taxonomy, 'taxonomy' ) );
			$level = 'level-' . $count;
		} else {
			$level = 'level-0';
		}

		echo '
term_id . '" class="' . $level . '">';
		$this->single_row_columns( $tag );
		echo '
';
	}

	/**
	 * @param WP_Term $tag Term object.
	 * @return string
	 */
	public function column_cb( $tag ) {
		if ( current_user_can( 'delete_term', $tag->term_id ) ) {
			return sprintf(
				'%2$s' .
				'<input type="checkbox" name="delete_tags[]" value="%1$s" id="cb-select-%1$s" />',
				$tag->term_id,
				/* translators: %s: Taxonomy term name. */
				sprintf( __( 'Select %s' ), $tag->name )
			);
		}

		return ' ';
	}

	/**
	 * @param WP_Term $tag Term object.
	 * @return string
	 */
	public function column_name( $tag ) {
		$taxonomy = $this->screen->taxonomy;

		$pad = str_repeat( '— ', max( 0, $this->level ) );

		/**
		 * Filters display of the term name in the terms list table.
		 *
		 * The default output may include padding due to the term's
		 * current level in the term hierarchy.
		 *
		 * @since 2.5.0
		 *
		 * @see WP_Terms_List_Table::column_name()
		 *
		 * @param string $pad_tag_name The term name, padded if not top-level.
		 * @param WP_Term $tag         Term object.
		 */
		$name = apply_filters( 'term_name', $pad . ' ' . $tag->name, $tag );

		$qe_data = get_term( $tag->term_id, $taxonomy, OBJECT, 'edit' );

		$uri = wp_doing_ajax() ? wp_get_referer() : $_SERVER['REQUEST_URI'];

		$edit_link = get_edit_term_link( $tag->term_id, $taxonomy, $this->screen->post_type );

		if ( $edit_link ) {
			$edit_link = add_query_arg(
				'wp_http_referer',
				urlencode( wp_unslash( $uri ) ),
				$edit_link
			);
			$name      = sprintf(
				'%s',
				esc_url( $edit_link ),
				/* translators: %s: Taxonomy term name. */
				esc_attr( sprintf( __( '“%s” (Edit)' ), $tag->name ) ),
				$name
			);
		}

		$out = sprintf(
			'%s
',
			$name
		);

		$out .= '
term_id . '">';
		$out .= '
' . $qe_data->name . '
';

		/** This filter is documented in wp-admin/edit-tag-form.php */
		$out .= '
' . apply_filters( 'editable_slug', $qe_data->slug, $qe_data ) . '
';
		$out .= '
' . $qe_data->parent . '

';

		return $out;
	}

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

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

		$taxonomy = $this->screen->taxonomy;
		$tax      = get_taxonomy( $taxonomy );
		$uri      = wp_doing_ajax() ? wp_get_referer() : $_SERVER['REQUEST_URI'];

		$edit_link = add_query_arg(
			'wp_http_referer',
			urlencode( wp_unslash( $uri ) ),
			get_edit_term_link( $tag->term_id, $taxonomy, $this->screen->post_type )
		);

		$actions = array();
		if ( current_user_can( 'edit_term', $tag->term_id ) ) {
			$actions['edit'] = sprintf(
				'%s',
				esc_url( $edit_link ),
				/* translators: %s: Taxonomy term name. */
				esc_attr( sprintf( __( 'Edit “%s”' ), $tag->name ) ),
				__( 'Edit' )
			);
			$actions['inline hide-if-no-js'] = sprintf(
				'<button type="button" class="button-link editinline" aria-label="%s" aria-expanded="false">%s</button>',
				/* translators: %s: Taxonomy term name. */
				esc_attr( sprintf( __( 'Quick edit “%s” inline' ), $tag->name ) ),
				__( 'Quick Edit' )
			);
		}
		if ( current_user_can( 'delete_term', $tag->term_id ) ) {
			$actions['delete'] = sprintf(
				'%s',
				wp_nonce_url( "edit-tags.php?action=delete&taxonomy=$taxonomy&tag_ID=$tag->term_id", 'delete-tag_' . $tag->term_id ),
				/* translators: %s: Taxonomy term name. */
				esc_attr( sprintf( __( 'Delete “%s”' ), $tag->name ) ),
				__( 'Delete' )
			);
		}
		if ( is_taxonomy_viewable( $tax ) ) {
			$actions['view'] = sprintf(
				'%s',
				get_term_link( $tag ),
				/* translators: %s: Taxonomy term name. */
				esc_attr( sprintf( __( 'View “%s” archive' ), $tag->name ) ),
				__( 'View' )
			);
		}

		/**
		 * Filters the action links displayed for each term in the Tags list table.
		 *
		 * @since 2.8.0
		 * @since 3.0.0 Deprecated in favor of {@see '{$taxonomy}_row_actions'} filter.
		 * @since 5.4.2 Restored (un-deprecated).
		 *
		 * @param string[] $actions An array of action links to be displayed. Default
		 *                          'Edit', 'Quick Edit', 'Delete', and 'View'.
		 * @param WP_Term  $tag     Term object.
		 */
		$actions = apply_filters( 'tag_row_actions', $actions, $tag );

		/**
		 * Filters the action links displayed for each term in the terms list table.
		 *
		 * The dynamic portion of the hook name, `$taxonomy`, refers to the taxonomy slug.
		 *
		 * @since 3.0.0
		 *
		 * @param string[] $actions An array of action links to be displayed. Default
		 *                          'Edit', 'Quick Edit', 'Delete', and 'View'.
		 * @param WP_Term  $tag     Term object.
		 */
		$actions = apply_filters( "{$taxonomy}_row_actions", $actions, $tag );

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

	/**
	 * @param WP_Term $tag Term object.
	 * @return string
	 */
	public function column_description( $tag ) {
		if ( $tag->description ) {
			return $tag->description;
		} else {
			return '—' . __( 'No description' ) . '';
		}
	}

	/**
	 * @param WP_Term $tag Term object.
	 * @return string
	 */
	public function column_slug( $tag ) {
		/** This filter is documented in wp-admin/edit-tag-form.php */
		return apply_filters( 'editable_slug', $tag->slug, $tag );
	}

	/**
	 * @param WP_Term $tag Term object.
	 * @return string
	 */
	public function column_posts( $tag ) {
		$count = number_format_i18n( $tag->count );

		$tax = get_taxonomy( $this->screen->taxonomy );

		$ptype_object = get_post_type_object( $this->screen->post_type );
		if ( ! $ptype_object->show_ui ) {
			return $count;
		}

		if ( $tax->query_var ) {
			$args = array( $tax->query_var => $tag->slug );
		} else {
			$args = array(
				'taxonomy' => $tax->name,
				'term'     => $tag->slug,
			);
		}

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

		if ( 'attachment' === $this->screen->post_type ) {
			return "$count";
		}

		return "$count";
	}

	/**
	 * @param WP_Term $tag Term object.
	 * @return string
	 */
	public function column_links( $tag ) {
		$count = number_format_i18n( $tag->count );
		if ( $count ) {
			$count = "term_id'>$count";
		}
		return $count;
	}

	/**
	 * @param WP_Term $tag         Term object.
	 * @param string  $column_name Name of the column.
	 * @return string
	 */
	public function column_default( $tag, $column_name ) {
		/**
		 * Filters the displayed columns in the terms list table.
		 *
		 * The dynamic portion of the hook name, `$this->screen->taxonomy`,
		 * refers to the slug of the current taxonomy.
		 *
		 * @since 2.8.0
		 *
		 * @param string $string      Blank string.
		 * @param string $column_name Name of the column.
		 * @param int    $term_id     Term ID.
		 */
		return apply_filters( "manage_{$this->screen->taxonomy}_custom_column", '', $column_name, $tag->term_id );
	}

	/**
	 * Outputs the hidden row displayed when inline editing
	 *
	 * @since 3.1.0
	 */
	public function inline_edit() {
		$tax = get_taxonomy( $this->screen->taxonomy );

		if ( ! current_user_can( $tax->cap->edit_terms ) ) {
			return;
		}
		?>

		<form method="get">

			<td colspan="<?php echo $this->get_column_count(); ?>" class="colspanchange">

			<fieldset>
				<legend class="inline-edit-legend"><?php _e( 'Quick Edit' ); ?></legend>

					<?php _ex( 'Name', 'term name' ); ?>
					<input type="text" name="name" class="ptitle" value="" />

				<?php if ( ! global_terms_enabled() ) : ?>

						<?php _e( 'Slug' ); ?>
						<input type="text" name="slug" class="ptitle" value="" />

				<?php endif; ?>

			</fieldset>

			<?php
			$core_columns = array(
				'cb'          => true,
				'description' => true,
				'name'        => true,
				'slug'        => true,
				'posts'       => true,
			);

			list( $columns ) = $this->get_column_info();

			foreach ( $columns as $column_name => $column_display_name ) {
				if ( isset( $core_columns[ $column_name ] ) ) {
					continue;
				}

				/** This action is documented in wp-admin/includes/class-wp-posts-list-table.php */
				do_action( 'quick_edit_custom_box', $column_name, 'edit-tags', $this->screen->taxonomy );
			}
			?>

				<button type="button" class="cancel button alignleft"><?php _e( 'Cancel' ); ?></button>
				<button type="button" class="save button button-primary alignright"><?php echo $tax->labels->update_item; ?></button>

				<?php wp_nonce_field( 'taxinlineeditnonce', '_inline_edit', false ); ?>
				<input type="hidden" name="taxonomy" value="<?php echo esc_attr( $this->screen->taxonomy ); ?>" />
				<input type="hidden" name="post_type" value="<?php echo esc_attr( $this->screen->post_type ); ?>" />

		</form>
		<?php
	}
}


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

/**
 * Core class used to implement displaying themes to install in a list table.
 *
 * @since 3.1.0
 * @access private
 *
 * @see WP_Themes_List_Table
 */
class WP_Theme_Install_List_Table extends WP_Themes_List_Table {

	public $features = array();

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

	/**
	 * @global array  $tabs
	 * @global string $tab
	 * @global int    $paged
	 * @global string $type
	 * @global array  $theme_field_defaults
	 */
	public function prepare_items() {
		require ABSPATH . 'wp-admin/includes/theme-install.php';

		global $tabs, $tab, $paged, $type, $theme_field_defaults;
		wp_reset_vars( array( 'tab' ) );

		$search_terms  = array();
		$search_string = '';
		if ( ! empty( $_REQUEST['s'] ) ) {
			$search_string = strtolower( wp_unslash( $_REQUEST['s'] ) );
			$search_terms  = array_unique( array_filter( array_map( 'trim', explode( ',', $search_string ) ) ) );
		}

		if ( ! empty( $_REQUEST['features'] ) ) {
			$this->features = $_REQUEST['features'];
		}

		$paged = $this->get_pagenum();

		$per_page = 36;

		// These are the tabs which are shown on the page,
		$tabs              = array();
		$tabs['dashboard'] = __( 'Search' );
		if ( 'search' === $tab ) {
			$tabs['search'] = __( 'Search Results' );
		}
		$tabs['upload']   = __( 'Upload' );
		$tabs['featured'] = _x( 'Featured', 'themes' );
		//$tabs['popular']  = _x( 'Popular', 'themes' );
		$tabs['new']     = _x( 'Latest', 'themes' );
		$tabs['updated'] = _x( 'Recently Updated', 'themes' );

		$nonmenu_tabs = array( 'theme-information' ); // Valid actions to perform which do not have a Menu item.

		/** This filter is documented in wp-admin/theme-install.php */
		$tabs = apply_filters( 'install_themes_tabs', $tabs );

		/**
		 * Filters tabs not associated with a menu item on the Install Themes screen.
		 *
		 * @since 2.8.0
		 *
		 * @param string[] $nonmenu_tabs The tabs that don't have a menu item on
		 *                               the Install Themes screen.
		 */
		$nonmenu_tabs = apply_filters( 'install_themes_nonmenu_tabs', $nonmenu_tabs );

		// If a non-valid menu tab has been selected, And it's not a non-menu action.
		if ( empty( $tab ) || ( ! isset( $tabs[ $tab ] ) && ! in_array( $tab, (array) $nonmenu_tabs, true ) ) ) {
			$tab = key( $tabs );
		}

		$args = array(
			'page'     => $paged,
			'per_page' => $per_page,
			'fields'   => $theme_field_defaults,
		);

		switch ( $tab ) {
			case 'search':
				$type = isset( $_REQUEST['type'] ) ? wp_unslash( $_REQUEST['type'] ) : 'term';
				switch ( $type ) {
					case 'tag':
						$args['tag'] = array_map( 'sanitize_key', $search_terms );
						break;
					case 'term':
						$args['search'] = $search_string;
						break;
					case 'author':
						$args['author'] = $search_string;
						break;
				}

				if ( ! empty( $this->features ) ) {
					$args['tag']      = $this->features;
					$_REQUEST['s']    = implode( ',', $this->features );
					$_REQUEST['type'] = 'tag';
				}

				add_action( 'install_themes_table_header', 'install_theme_search_form', 10, 0 );
				break;

			case 'featured':
				// case 'popular':
			case 'new':
			case 'updated':
				$args['browse'] = $tab;
				break;

			default:
				$args = false;
				break;
		}

		/**
		 * Filters API request arguments for each Install Themes screen tab.
		 *
		 * The dynamic portion of the hook name, `$tab`, refers to the theme install
		 * tabs. Default tabs are 'dashboard', 'search', 'upload', 'featured',
		 * 'new', and 'updated'.
		 *
		 * @since 3.7.0
		 *
		 * @param array|false $args Theme install API arguments.
		 */
		$args = apply_filters( "install_themes_table_api_args_{$tab}", $args );

		if ( ! $args ) {
			return;
		}

		$api = themes_api( 'query_themes', $args );

		if ( is_wp_error( $api ) ) {
			wp_die( $api->get_error_message() . '

' . __( 'Try Again' ) . '' );
		}

		$this->items = $api->themes;

		$this->set_pagination_args(
			array(
				'total_items'     => $api->info['results'],
				'per_page'        => $args['per_page'],
				'infinite_scroll' => true,
			)
		);
	}

	/**
	 */
	public function no_items() {
		_e( 'No themes match your request.' );
	}

	/**
	 * @global array $tabs
	 * @global string $tab
	 * @return array
	 */
	protected function get_views() {
		global $tabs, $tab;

		$display_tabs = array();
		foreach ( (array) $tabs as $action => $text ) {
			$current_link_attributes                    = ( $action === $tab ) ? ' class="current" aria-current="page"' : '';
			$href                                       = self_admin_url( 'theme-install.php?tab=' . $action );
			$display_tabs[ 'theme-install-' . $action ] = "$text";
		}

		return $display_tabs;
	}

	/**
	 * Displays the theme install table.
	 *
	 * Overrides the parent display() method to provide a different container.
	 *
	 * @since 3.1.0
	 */
	public function display() {
		wp_nonce_field( 'fetch-list-' . get_class( $this ), '_ajax_fetch_list_nonce' );
		?>

				<?php
				/**
				 * Fires in the Install Themes list table header.
				 *
				 * @since 2.8.0
				 */
				do_action( 'install_themes_table_header' );
				?>

			<?php $this->pagination( 'top' ); ?>

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

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

	/**
	 */
	public function display_rows() {
		$themes = $this->items;
		foreach ( $themes as $theme ) {
			?>

				<?php
					$this->single_row( $theme );
				?>

			<?php
		} // End foreach $theme_names.

		$this->theme_installer();
	}

	/**
	 * Prints a theme from the WordPress.org API.
	 *
	 * @since 3.1.0
	 *
	 * @global array $themes_allowedtags
	 *
	 * @param object $theme {
	 *     An object that contains theme data returned by the WordPress.org API.
	 *
	 *     @type string $name           Theme name, e.g. 'Twenty Twenty'.
	 *     @type string $slug           Theme slug, e.g. 'twentytwenty'.
	 *     @type string $version        Theme version, e.g. '1.1'.
	 *     @type string $author         Theme author username, e.g. 'melchoyce'.
	 *     @type string $preview_url    Preview URL, e.g. 'https://2020.wordpress.net/'.
	 *     @type string $screenshot_url Screenshot URL, e.g. 'https://wordpress.org/themes/twentytwenty/'.
	 *     @type float  $rating         Rating score.
	 *     @type int    $num_ratings    The number of ratings.
	 *     @type string $homepage       Theme homepage, e.g. 'https://wordpress.org/themes/twentytwenty/'.
	 *     @type string $description    Theme description.
	 *     @type string $download_link  Theme ZIP download URL.
	 * }
	 */
	public function single_row( $theme ) {
		global $themes_allowedtags;

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

		$name   = wp_kses( $theme->name, $themes_allowedtags );
		$author = wp_kses( $theme->author, $themes_allowedtags );

		/* translators: %s: Theme name. */
		$preview_title = sprintf( __( 'Preview “%s”' ), $name );
		$preview_url   = add_query_arg(
			array(
				'tab'   => 'theme-information',
				'theme' => $theme->slug,
			),
			self_admin_url( 'theme-install.php' )
		);

		$actions = array();

		$install_url = add_query_arg(
			array(
				'action' => 'install-theme',
				'theme'  => $theme->slug,
			),
			self_admin_url( 'update.php' )
		);

		$update_url = add_query_arg(
			array(
				'action' => 'upgrade-theme',
				'theme'  => $theme->slug,
			),
			self_admin_url( 'update.php' )
		);

		$status = $this->_get_theme_status( $theme );

		switch ( $status ) {
			case 'update_available':
				$actions[] = sprintf(
					'%s',
					esc_url( wp_nonce_url( $update_url, 'upgrade-theme_' . $theme->slug ) ),
					/* translators: %s: Theme version. */
					esc_attr( sprintf( __( 'Update to version %s' ), $theme->version ) ),
					__( 'Update' )
				);
				break;
			case 'newer_installed':
			case 'latest_installed':
				$actions[] = sprintf(
					'%s',
					esc_attr__( 'This theme is already installed and is up to date' ),
					_x( 'Installed', 'theme' )
				);
				break;
			case 'install':
			default:
				$actions[] = sprintf(
					'%s',
					esc_url( wp_nonce_url( $install_url, 'install-theme_' . $theme->slug ) ),
					/* translators: %s: Theme name. */
					esc_attr( sprintf( _x( 'Install %s', 'theme' ), $name ) ),
					__( 'Install Now' )
				);
				break;
		}

		$actions[] = sprintf(
			'%s',
			esc_url( $preview_url ),
			/* translators: %s: Theme name. */
			esc_attr( sprintf( __( 'Preview %s' ), $name ) ),
			__( 'Preview' )
		);

		/**
		 * Filters the install action links for a theme in the Install Themes list table.
		 *
		 * @since 3.4.0
		 *
		 * @param string[] $actions An array of theme action links. Defaults are
		 *                          links to Install Now, Preview, and Details.
		 * @param WP_Theme $theme   Theme object.
		 */
		$actions = apply_filters( 'theme_install_actions', $actions, $theme );

		?>
		<a class="screenshot install-theme-preview" href="<?php echo esc_url( $preview_url ); ?>" title="<?php echo esc_attr( $preview_title ); ?>">
			<img src="<?php echo esc_url( $theme->screenshot_url ); ?>" width="150" alt="" />

<?php echo $name; ?>

		<?php
			/* translators: %s: Theme author. */
			printf( __( 'By %s' ), $author );
		?>

				<?php foreach ( $actions as $action ) : ?>

<?php echo $action; ?>

				<?php endforeach; ?>

<?php _e( 'Details' ); ?>

		<?php
		$this->install_theme_info( $theme );
	}

	/**
	 * Prints the wrapper for the theme installer.
	 */
	public function theme_installer() {
		?>

					<?php _e( 'Close' ); ?>

					<button type="button" class="collapse-sidebar button" aria-expanded="true" aria-label="<?php esc_attr_e( 'Collapse Sidebar' ); ?>">

						<?php _e( 'Collapse' ); ?>
					</button>

		<?php
	}

	/**
	 * Prints the wrapper for the theme installer with a provided theme's data.
	 * Used to make the theme installer work for no-js.
	 *
	 * @param object $theme - A WordPress.org Theme API object.
	 */
	public function theme_installer_single( $theme ) {
		?>

				<?php $this->install_theme_info( $theme ); ?>

				<iframe src="<?php echo esc_url( $theme->preview_url ); ?>">

		<?php
	}

	/**
	 * Prints the info for a theme (to be used in the theme installer modal).
	 *
	 * @global array $themes_allowedtags
	 *
	 * @param object $theme - A WordPress.org Theme API object.
	 */
	public function install_theme_info( $theme ) {
		global $themes_allowedtags;

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

		$name   = wp_kses( $theme->name, $themes_allowedtags );
		$author = wp_kses( $theme->author, $themes_allowedtags );

		$install_url = add_query_arg(
			array(
				'action' => 'install-theme',
				'theme'  => $theme->slug,
			),
			self_admin_url( 'update.php' )
		);

		$update_url = add_query_arg(
			array(
				'action' => 'upgrade-theme',
				'theme'  => $theme->slug,
			),
			self_admin_url( 'update.php' )
		);

		$status = $this->_get_theme_status( $theme );

		?>

		<?php
		switch ( $status ) {
			case 'update_available':
				printf(
					'%s',
					esc_url( wp_nonce_url( $update_url, 'upgrade-theme_' . $theme->slug ) ),
					/* translators: %s: Theme version. */
					esc_attr( sprintf( __( 'Update to version %s' ), $theme->version ) ),
					__( 'Update' )
				);
				break;
			case 'newer_installed':
			case 'latest_installed':
				printf(
					'%s',
					esc_attr__( 'This theme is already installed and is up to date' ),
					_x( 'Installed', 'theme' )
				);
				break;
			case 'install':
			default:
				printf(
					'%s',
					esc_url( wp_nonce_url( $install_url, 'install-theme_' . $theme->slug ) ),
					__( 'Install' )
				);
				break;
		}
		?>

<?php echo $name; ?>

			<?php
				/* translators: %s: Theme author. */
				printf( __( 'By %s' ), $author );
			?>

			<?php if ( isset( $theme->screenshot_url ) ) : ?>
				<img class="theme-screenshot" src="<?php echo esc_url( $theme->screenshot_url ); ?>" alt="" />
			<?php endif; ?>

				<?php
				wp_star_rating(
					array(
						'rating' => $theme->rating,
						'type'   => 'percent',
						'number' => $theme->num_ratings,
					)
				);
				?>

					<?php _e( 'Version:' ); ?>
					<?php echo wp_kses( $theme->version, $themes_allowedtags ); ?>

					<?php echo wp_kses( $theme->description, $themes_allowedtags ); ?>

			<input class="theme-preview-url" type="hidden" value="<?php echo esc_url( $theme->preview_url ); ?>" />

		<?php
	}

	/**
	 * Send required variables to JavaScript land
	 *
	 * @since 3.4.0
	 *
	 * @global string $tab  Current tab within Themes->Install screen
	 * @global string $type Type of search.
	 *
	 * @param array $extra_args Unused.
	 */
	public function _js_vars( $extra_args = array() ) {
		global $tab, $type;
		parent::_js_vars( compact( 'tab', 'type' ) );
	}

	/**
	 * Check to see if the theme is already installed.
	 *
	 * @since 3.4.0
	 *
	 * @param object $theme - A WordPress.org Theme API object.
	 * @return string Theme status.
	 */
	private function _get_theme_status( $theme ) {
		$status = 'install';

		$installed_theme = wp_get_theme( $theme->slug );
		if ( $installed_theme->exists() ) {
			if ( version_compare( $installed_theme->get( 'Version' ), $theme->version, '=' ) ) {
				$status = 'latest_installed';
			} elseif ( version_compare( $installed_theme->get( 'Version' ), $theme->version, '>' ) ) {
				$status = 'newer_installed';
			} else {
				$status = 'update_available';
			}
		}

		return $status;
	}
}


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

/**
 * Core class used to implement displaying installed themes in a list table.
 *
 * @since 3.1.0
 * @access private
 *
 * @see WP_List_Table
 */
class WP_Themes_List_Table extends WP_List_Table {

	protected $search_terms = array();
	public $features        = array();

	/**
	 * 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() ) {
		parent::__construct(
			array(
				'ajax'   => true,
				'screen' => isset( $args['screen'] ) ? $args['screen'] : null,
			)
		);
	}

	/**
	 * @return bool
	 */
	public function ajax_user_can() {
		// Do not check edit_theme_options here. Ajax calls for available themes require switch_themes.
		return current_user_can( 'switch_themes' );
	}

	/**
	 */
	public function prepare_items() {
		$themes = wp_get_themes( array( 'allowed' => true ) );

		if ( ! empty( $_REQUEST['s'] ) ) {
			$this->search_terms = array_unique( array_filter( array_map( 'trim', explode( ',', strtolower( wp_unslash( $_REQUEST['s'] ) ) ) ) ) );
		}

		if ( ! empty( $_REQUEST['features'] ) ) {
			$this->features = $_REQUEST['features'];
		}

		if ( $this->search_terms || $this->features ) {
			foreach ( $themes as $key => $theme ) {
				if ( ! $this->search_theme( $theme ) ) {
					unset( $themes[ $key ] );
				}
			}
		}

		unset( $themes[ get_option( 'stylesheet' ) ] );
		WP_Theme::sort_by_name( $themes );

		$per_page = 36;
		$page     = $this->get_pagenum();

		$start = ( $page - 1 ) * $per_page;

		$this->items = array_slice( $themes, $start, $per_page, true );

		$this->set_pagination_args(
			array(
				'total_items'     => count( $themes ),
				'per_page'        => $per_page,
				'infinite_scroll' => true,
			)
		);
	}

	/**
	 */
	public function no_items() {
		if ( $this->search_terms || $this->features ) {
			_e( 'No items found.' );
			return;
		}

		$blog_id = get_current_blog_id();
		if ( is_multisite() ) {
			if ( current_user_can( 'install_themes' ) && current_user_can( 'manage_network_themes' ) ) {
				printf(
					/* translators: 1: URL to Themes tab on Edit Site screen, 2: URL to Add Themes screen. */
					__( 'You only have one theme enabled for this site right now. Visit the Network Admin to enable or install more themes.' ),
					network_admin_url( 'site-themes.php?id=' . $blog_id ),
					network_admin_url( 'theme-install.php' )
				);

				return;
			} elseif ( current_user_can( 'manage_network_themes' ) ) {
				printf(
					/* translators: %s: URL to Themes tab on Edit Site screen. */
					__( 'You only have one theme enabled for this site right now. Visit the Network Admin to enable more themes.' ),
					network_admin_url( 'site-themes.php?id=' . $blog_id )
				);

				return;
			}
			// Else, fallthrough. install_themes doesn't help if you can't enable it.
		} else {
			if ( current_user_can( 'install_themes' ) ) {
				printf(
					/* translators: %s: URL to Add Themes screen. */
					__( 'You only have one theme installed right now. Live a little! You can choose from over 1,000 free themes in the WordPress Theme Directory at any time: just click on the Install Themes tab above.' ),
					admin_url( 'theme-install.php' )
				);

				return;
			}
		}
		// Fallthrough.
		printf(
			/* translators: %s: Network title. */
			__( 'Only the current theme is available to you. Contact the %s administrator for information about accessing additional themes.' ),
			get_site_option( 'site_name' )
		);
	}

	/**
	 * @param string $which
	 */
	public function tablenav( $which = 'top' ) {
		if ( $this->get_pagination_arg( 'total_pages' ) <= 1 ) {
			return;
		}
		?>
		<div class="tablenav themes <?php echo $which; ?>">
			<?php $this->pagination( $which ); ?>

		<?php
	}

	/**
	 * Displays the themes table.
	 *
	 * Overrides the parent display() method to provide a different container.
	 *
	 * @since 3.1.0
	 */
	public function display() {
		wp_nonce_field( 'fetch-list-' . get_class( $this ), '_ajax_fetch_list_nonce' );
		?>
		<?php $this->tablenav( 'top' ); ?>

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

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

	/**
	 * @return array
	 */
	public function get_columns() {
		return array();
	}

	/**
	 */
	public function display_rows_or_placeholder() {
		if ( $this->has_items() ) {
			$this->display_rows();
		} else {
			echo '
';
			$this->no_items();
			echo '
';
		}
	}

	/**
	 */
	public function display_rows() {
		$themes = $this->items;

		foreach ( $themes as $theme ) :
			?>

			<?php

			$template   = $theme->get_template();
			$stylesheet = $theme->get_stylesheet();
			$title      = $theme->display( 'Name' );
			$version    = $theme->display( 'Version' );
			$author     = $theme->display( 'Author' );

			$activate_link = wp_nonce_url( 'themes.php?action=activate&template=' . urlencode( $template ) . '&stylesheet=' . urlencode( $stylesheet ), 'switch-theme_' . $stylesheet );

			$actions             = array();
			$actions['activate'] = sprintf(
				'%s',
				$activate_link,
				/* translators: %s: Theme name. */
				esc_attr( sprintf( _x( 'Activate “%s”', 'theme' ), $title ) ),
				__( 'Activate' )
			);

			if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
				$actions['preview'] .= sprintf(
					'%s',
					wp_customize_url( $stylesheet ),
					__( 'Live Preview' )
				);
			}

			if ( ! is_multisite() && current_user_can( 'delete_themes' ) ) {
				$actions['delete'] = sprintf(
					'%s',
					wp_nonce_url( 'themes.php?action=delete&stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet ),
					/* translators: %s: Theme name. */
					esc_js( sprintf( __( "You are about to delete this theme '%s'\n  'Cancel' to stop, 'OK' to delete." ), $title ) ),
					__( 'Delete' )
				);
			}

			/** This filter is documented in wp-admin/includes/class-wp-ms-themes-list-table.php */
			$actions = apply_filters( 'theme_action_links', $actions, $theme, 'all' );

			/** This filter is documented in wp-admin/includes/class-wp-ms-themes-list-table.php */
			$actions       = apply_filters( "theme_action_links_{$stylesheet}", $actions, $theme, 'all' );
			$delete_action = isset( $actions['delete'] ) ? '
' . $actions['delete'] . '
' : '';
			unset( $actions['delete'] );

			$screenshot = $theme->get_screenshot();
			?>

				<?php if ( $screenshot ) : ?>
					<img src="<?php echo esc_url( $screenshot ); ?>" alt="" />
				<?php endif; ?>

			<a href="<?php echo wp_customize_url( $stylesheet ); ?>" class="screenshot load-customize hide-if-no-customize">
				<?php if ( $screenshot ) : ?>
					<img src="<?php echo esc_url( $screenshot ); ?>" alt="" />
				<?php endif; ?>

<?php echo $title; ?>

				<?php
					/* translators: %s: Theme author. */
					printf( __( 'By %s' ), $author );
				?>

					<?php foreach ( $actions as $action ) : ?>

<?php echo $action; ?>

					<?php endforeach; ?>

<?php _e( 'Details' ); ?>

				<?php echo $delete_action; ?>

				<?php theme_update_available( $theme ); ?>

<?php _e( 'Version:' ); ?> <?php echo $version; ?>

<?php echo $theme->display( 'Description' ); ?>

				<?php
				if ( $theme->parent() ) {
					printf(
						/* translators: 1: Link to documentation on child themes, 2: Name of parent theme. */
						'
' . __( 'This child theme requires its parent theme, %2$s.' ) . '
',
						__( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ),
						$theme->parent()->display( 'Name' )
					);
				}
				?>

			<?php
		endforeach;
	}

	/**
	 * @param WP_Theme $theme
	 * @return bool
	 */
	public function search_theme( $theme ) {
		// Search the features.
		foreach ( $this->features as $word ) {
			if ( ! in_array( $word, $theme->get( 'Tags' ), true ) ) {
				return false;
			}
		}

		// Match all phrases.
		foreach ( $this->search_terms as $word ) {
			if ( in_array( $word, $theme->get( 'Tags' ), true ) ) {
				continue;
			}

			foreach ( array( 'Name', 'Description', 'Author', 'AuthorURI' ) as $header ) {
				// Don't mark up; Do translate.
				if ( false !== stripos( strip_tags( $theme->display( $header, false, true ) ), $word ) ) {
					continue 2;
				}
			}

			if ( false !== stripos( $theme->get_stylesheet(), $word ) ) {
				continue;
			}

			if ( false !== stripos( $theme->get_template(), $word ) ) {
				continue;
			}

			return false;
		}

		return true;
	}

	/**
	 * Send required variables to JavaScript land
	 *
	 * @since 3.4.0
	 *
	 * @param array $extra_args
	 */
	public function _js_vars( $extra_args = array() ) {
		$search_string = isset( $_REQUEST['s'] ) ? esc_attr( wp_unslash( $_REQUEST['s'] ) ) : '';

		$args = array(
			'search'      => $search_string,
			'features'    => $this->features,
			'paged'       => $this->get_pagenum(),
			'total_pages' => ! empty( $this->_pagination_args['total_pages'] ) ? $this->_pagination_args['total_pages'] : 1,
		);

		if ( is_array( $extra_args ) ) {
			$args = array_merge( $args, $extra_args );
		}

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


<?php
/**
 * Upgrader API: WP_Upgrader_Skin class
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 4.6.0
 */

/**
 * Generic Skin for the WordPress Upgrader classes. This skin is designed to be extended for specific purposes.
 *
 * @since 2.8.0
 * @since 4.6.0 Moved to its own file from wp-admin/includes/class-wp-upgrader-skins.php.
 */
class WP_Upgrader_Skin {

	/**
	 * Holds the upgrader data.
	 *
	 * @since 2.8.0
	 *
	 * @var object
	 */
	public $upgrader;

	/**
	 * Whether header is done.
	 *
	 * @since 2.8.0
	 *
	 * @var bool
	 */
	public $done_header = false;

	/**
	 * Whether footer is done.
	 *
	 * @since 2.8.0
	 *
	 * @var bool
	 */
	public $done_footer = false;

	/**
	 * Holds the result of an upgrade.
	 *
	 * @since 2.8.0
	 *
	 * @var string|bool|WP_Error
	 */
	public $result = false;

	/**
	 * Holds the options of an upgrade.
	 *
	 * @since 2.8.0
	 *
	 * @var array
	 */
	public $options = array();

	/**
	 * Constructor.
	 *
	 * Sets up the generic skin for the WordPress Upgrader classes.
	 *
	 * @since 2.8.0
	 *
	 * @param array $args Optional. The WordPress upgrader skin arguments to
	 *                    override default options. Default empty array.
	 */
	public function __construct( $args = array() ) {
		$defaults      = array(
			'url'     => '',
			'nonce'   => '',
			'title'   => '',
			'context' => false,
		);
		$this->options = wp_parse_args( $args, $defaults );
	}

	/**
	 * @param WP_Upgrader $upgrader
	 */
	public function set_upgrader( &$upgrader ) {
		if ( is_object( $upgrader ) ) {
			$this->upgrader =& $upgrader;
		}
		$this->add_strings();
	}

	/**
	 */
	public function add_strings() {
	}

	/**
	 * Sets the result of an upgrade.
	 *
	 * @since 2.8.0
	 *
	 * @param string|bool|WP_Error $result The result of an upgrade.
	 */
	public function set_result( $result ) {
		$this->result = $result;
	}

	/**
	 * Displays a form to the user to request for their FTP/SSH details in order
	 * to connect to the filesystem.
	 *
	 * @since 2.8.0
	 * @since 4.6.0 The `$context` parameter default changed from `false` to an empty string.
	 *
	 * @see request_filesystem_credentials()
	 *
	 * @param bool|WP_Error $error                        Optional. Whether the current request has failed to connect,
	 *                                                    or an error object. Default false.
	 * @param string        $context                      Optional. Full path to the directory that is tested
	 *                                                    for being writable. Default empty.
	 * @param bool          $allow_relaxed_file_ownership Optional. Whether to allow Group/World writable. Default false.
	 * @return bool True on success, false on failure.
	 */
	public function request_filesystem_credentials( $error = false, $context = '', $allow_relaxed_file_ownership = false ) {
		$url = $this->options['url'];
		if ( ! $context ) {
			$context = $this->options['context'];
		}
		if ( ! empty( $this->options['nonce'] ) ) {
			$url = wp_nonce_url( $url, $this->options['nonce'] );
		}

		$extra_fields = array();

		return request_filesystem_credentials( $url, '', $error, $context, $extra_fields, $allow_relaxed_file_ownership );
	}

	/**
	 */
	public function header() {
		if ( $this->done_header ) {
			return;
		}
		$this->done_header = true;
		echo '
';
		echo '
' . $this->options['title'] . '
';
	}

	/**
	 */
	public function footer() {
		if ( $this->done_footer ) {
			return;
		}
		$this->done_footer = true;
		echo '
';
	}

	/**
	 * @param string|WP_Error $errors
	 */
	public function error( $errors ) {
		if ( ! $this->done_header ) {
			$this->header();
		}
		if ( is_string( $errors ) ) {
			$this->feedback( $errors );
		} elseif ( is_wp_error( $errors ) && $errors->has_errors() ) {
			foreach ( $errors->get_error_messages() as $message ) {
				if ( $errors->get_error_data() && is_string( $errors->get_error_data() ) ) {
					$this->feedback( $message . ' ' . esc_html( strip_tags( $errors->get_error_data() ) ) );
				} else {
					$this->feedback( $message );
				}
			}
		}
	}

	/**
	 * @param string $string
	 * @param mixed  ...$args Optional text replacements.
	 */
	public function feedback( $string, ...$args ) {
		if ( isset( $this->upgrader->strings[ $string ] ) ) {
			$string = $this->upgrader->strings[ $string ];
		}

		if ( strpos( $string, '%' ) !== false ) {
			if ( $args ) {
				$args   = array_map( 'strip_tags', $args );
				$args   = array_map( 'esc_html', $args );
				$string = vsprintf( $string, $args );
			}
		}
		if ( empty( $string ) ) {
			return;
		}
		show_message( $string );
	}

	/**
	 * Action to perform before an update.
	 *
	 * @since 2.8.0
	 */
	public function before() {}

	/**
	 * Action to perform following an update.
	 *
	 * @since 2.8.0
	 */
	public function after() {}

	/**
	 * Output JavaScript that calls function to decrement the update counts.
	 *
	 * @since 3.9.0
	 *
	 * @param string $type Type of update count to decrement. Likely values include 'plugin',
	 *                     'theme', 'translation', etc.
	 */
	protected function decrement_update_count( $type ) {
		if ( ! $this->result || is_wp_error( $this->result ) || 'up_to_date' === $this->result ) {
			return;
		}

		if ( defined( 'IFRAME_REQUEST' ) ) {
			echo '';
		} else {
			echo '';
		}
	}

	/**
	 */
	public function bulk_header() {}

	/**
	 */
	public function bulk_footer() {}

	/**
	 * Hides the `process_failed` error message when updating by uploading a zip file.
	 *
	 * @since 5.5.0
	 *
	 * @param WP_Error $wp_error WP_Error
	 * @return bool
	 */
	public function hide_process_failed( $wp_error ) {
		return false;
	}
}


<?php
/**
 * The User Interface "Skins" for the WordPress File Upgrader
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 2.8.0
 * @deprecated 4.7.0
 */

_deprecated_file( basename( __FILE__ ), '4.7.0', 'class-wp-upgrader.php' );

/** WP_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader-skin.php';

/** Plugin_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader-skin.php';

/** Theme_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader-skin.php';

/** Bulk_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-bulk-upgrader-skin.php';

/** Bulk_Plugin_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-bulk-plugin-upgrader-skin.php';

/** Bulk_Theme_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-bulk-theme-upgrader-skin.php';

/** Plugin_Installer_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-plugin-installer-skin.php';

/** Theme_Installer_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-theme-installer-skin.php';

/** Language_Pack_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader-skin.php';

/** Automatic_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-automatic-upgrader-skin.php';

/** WP_Ajax_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-wp-ajax-upgrader-skin.php';


<?php
/**
 * Upgrade API: WP_Upgrader class
 *
 * Requires skin classes and WP_Upgrader subclasses for backward compatibility.
 *
 * @package WordPress
 * @subpackage Upgrader
 * @since 2.8.0
 */

/** WP_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-wp-upgrader-skin.php';

/** Plugin_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader-skin.php';

/** Theme_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader-skin.php';

/** Bulk_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-bulk-upgrader-skin.php';

/** Bulk_Plugin_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-bulk-plugin-upgrader-skin.php';

/** Bulk_Theme_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-bulk-theme-upgrader-skin.php';

/** Plugin_Installer_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-plugin-installer-skin.php';

/** Theme_Installer_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-theme-installer-skin.php';

/** Language_Pack_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader-skin.php';

/** Automatic_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-automatic-upgrader-skin.php';

/** WP_Ajax_Upgrader_Skin class */
require_once ABSPATH . 'wp-admin/includes/class-wp-ajax-upgrader-skin.php';

/**
 * Core class used for upgrading/installing a local set of files via
 * the Filesystem Abstraction classes from a Zip file.
 *
 * @since 2.8.0
 */
class WP_Upgrader {

	/**
	 * The error/notification strings used to update the user on the progress.
	 *
	 * @since 2.8.0
	 * @var array $strings
	 */
	public $strings = array();

	/**
	 * The upgrader skin being used.
	 *
	 * @since 2.8.0
	 * @var Automatic_Upgrader_Skin|WP_Upgrader_Skin $skin
	 */
	public $skin = null;

	/**
	 * The result of the installation.
	 *
	 * This is set by WP_Upgrader::install_package(), only when the package is installed
	 * successfully. It will then be an array, unless a WP_Error is returned by the
	 * {@see 'upgrader_post_install'} filter. In that case, the WP_Error will be assigned to
	 * it.
	 *
	 * @since 2.8.0
	 *
	 * @var array|WP_Error $result {
	 *     @type string $source             The full path to the source the files were installed from.
	 *     @type string $source_files       List of all the files in the source directory.
	 *     @type string $destination        The full path to the installation destination folder.
	 *     @type string $destination_name   The name of the destination folder, or empty if `$destination`
	 *                                      and `$local_destination` are the same.
	 *     @type string $local_destination  The full local path to the destination folder. This is usually
	 *                                      the same as `$destination`.
	 *     @type string $remote_destination The full remote path to the destination folder
	 *                                      (i.e., from `$wp_filesystem`).
	 *     @type bool   $clear_destination  Whether the destination folder was cleared.
	 * }
	 */
	public $result = array();

	/**
	 * The total number of updates being performed.
	 *
	 * Set by the bulk update methods.
	 *
	 * @since 3.0.0
	 * @var int $update_count
	 */
	public $update_count = 0;

	/**
	 * The current update if multiple updates are being performed.
	 *
	 * Used by the bulk update methods, and incremented for each update.
	 *
	 * @since 3.0.0
	 * @var int
	 */
	public $update_current = 0;

	/**
	 * Construct the upgrader with a skin.
	 *
	 * @since 2.8.0
	 *
	 * @param WP_Upgrader_Skin $skin The upgrader skin to use. Default is a WP_Upgrader_Skin
	 *                               instance.
	 */
	public function __construct( $skin = null ) {
		if ( null == $skin ) {
			$this->skin = new WP_Upgrader_Skin();
		} else {
			$this->skin = $skin;
		}
	}

	/**
	 * Initialize the upgrader.
	 *
	 * This will set the relationship between the skin being used and this upgrader,
	 * and also add the generic strings to `WP_Upgrader::$strings`.
	 *
	 * @since 2.8.0
	 */
	public function init() {
		$this->skin->set_upgrader( $this );
		$this->generic_strings();
	}

	/**
	 * Add the generic strings to WP_Upgrader::$strings.
	 *
	 * @since 2.8.0
	 */
	public function generic_strings() {
		$this->strings['bad_request']       = __( 'Invalid data provided.' );
		$this->strings['fs_unavailable']    = __( 'Could not access filesystem.' );
		$this->strings['fs_error']          = __( 'Filesystem error.' );
		$this->strings['fs_no_root_dir']    = __( 'Unable to locate WordPress root directory.' );
		$this->strings['fs_no_content_dir'] = __( 'Unable to locate WordPress content directory (wp-content).' );
		$this->strings['fs_no_plugins_dir'] = __( 'Unable to locate WordPress plugin directory.' );
		$this->strings['fs_no_themes_dir']  = __( 'Unable to locate WordPress theme directory.' );
		/* translators: %s: Directory name. */
		$this->strings['fs_no_folder'] = __( 'Unable to locate needed folder (%s).' );

		$this->strings['download_failed']      = __( 'Download failed.' );
		$this->strings['installing_package']   = __( 'Installing the latest version…' );
		$this->strings['no_files']             = __( 'The package contains no files.' );
		$this->strings['folder_exists']        = __( 'Destination folder already exists.' );
		$this->strings['mkdir_failed']         = __( 'Could not create directory.' );
		$this->strings['incompatible_archive'] = __( 'The package could not be installed.' );
		$this->strings['files_not_writable']   = __( 'The update cannot be installed because we will be unable to copy some files. This is usually due to inconsistent file permissions.' );

		$this->strings['maintenance_start'] = __( 'Enabling Maintenance mode…' );
		$this->strings['maintenance_end']   = __( 'Disabling Maintenance mode…' );
	}

	/**
	 * Connect to the filesystem.
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
	 *
	 * @param string[] $directories                  Optional. Array of directories. If any of these do
	 *                                               not exist, a WP_Error object will be returned.
	 *                                               Default empty array.
	 * @param bool     $allow_relaxed_file_ownership Whether to allow relaxed file ownership.
	 *                                               Default false.
	 * @return bool|WP_Error True if able to connect, false or a WP_Error otherwise.
	 */
	public function fs_connect( $directories = array(), $allow_relaxed_file_ownership = false ) {
		global $wp_filesystem;

		$credentials = $this->skin->request_filesystem_credentials( false, $directories[0], $allow_relaxed_file_ownership );
		if ( false === $credentials ) {
			return false;
		}

		if ( ! WP_Filesystem( $credentials, $directories[0], $allow_relaxed_file_ownership ) ) {
			$error = true;
			if ( is_object( $wp_filesystem ) && $wp_filesystem->errors->has_errors() ) {
				$error = $wp_filesystem->errors;
			}
			// Failed to connect. Error and request again.
			$this->skin->request_filesystem_credentials( $error, $directories[0], $allow_relaxed_file_ownership );
			return false;
		}

		if ( ! is_object( $wp_filesystem ) ) {
			return new WP_Error( 'fs_unavailable', $this->strings['fs_unavailable'] );
		}

		if ( is_wp_error( $wp_filesystem->errors ) && $wp_filesystem->errors->has_errors() ) {
			return new WP_Error( 'fs_error', $this->strings['fs_error'], $wp_filesystem->errors );
		}

		foreach ( (array) $directories as $dir ) {
			switch ( $dir ) {
				case ABSPATH:
					if ( ! $wp_filesystem->abspath() ) {
						return new WP_Error( 'fs_no_root_dir', $this->strings['fs_no_root_dir'] );
					}
					break;
				case WP_CONTENT_DIR:
					if ( ! $wp_filesystem->wp_content_dir() ) {
						return new WP_Error( 'fs_no_content_dir', $this->strings['fs_no_content_dir'] );
					}
					break;
				case WP_PLUGIN_DIR:
					if ( ! $wp_filesystem->wp_plugins_dir() ) {
						return new WP_Error( 'fs_no_plugins_dir', $this->strings['fs_no_plugins_dir'] );
					}
					break;
				case get_theme_root():
					if ( ! $wp_filesystem->wp_themes_dir() ) {
						return new WP_Error( 'fs_no_themes_dir', $this->strings['fs_no_themes_dir'] );
					}
					break;
				default:
					if ( ! $wp_filesystem->find_folder( $dir ) ) {
						return new WP_Error( 'fs_no_folder', sprintf( $this->strings['fs_no_folder'], esc_html( basename( $dir ) ) ) );
					}
					break;
			}
		}
		return true;
	}

	/**
	 * Download a package.
	 *
	 * @since 2.8.0
	 * @since 5.5.0 Added the `$hook_extra` parameter.
	 *
	 * @param string $package          The URI of the package. If this is the full path to an
	 *                                 existing local file, it will be returned untouched.
	 * @param bool   $check_signatures Whether to validate file signatures. Default false.
	 * @param array  $hook_extra       Extra arguments to pass to the filter hooks. Default empty array.
	 * @return string|WP_Error The full path to the downloaded package file, or a WP_Error object.
	 */
	public function download_package( $package, $check_signatures = false, $hook_extra = array() ) {
		/**
		 * Filters whether to return the package.
		 *
		 * @since 3.7.0
		 * @since 5.5.0 Added the `$hook_extra` parameter.
		 *
		 * @param bool        $reply      Whether to bail without returning the package.
		 *                                Default false.
		 * @param string      $package    The package file name.
		 * @param WP_Upgrader $this       The WP_Upgrader instance.
		 * @param array       $hook_extra Extra arguments passed to hooked filters.
		 */
		$reply = apply_filters( 'upgrader_pre_download', false, $package, $this, $hook_extra );
		if ( false !== $reply ) {
			return $reply;
		}

		if ( ! preg_match( '!^(http|https|ftp)://!i', $package ) && file_exists( $package ) ) { // Local file or remote?
			return $package; // Must be a local file.
		}

		if ( empty( $package ) ) {
			return new WP_Error( 'no_package', $this->strings['no_package'] );
		}

		$this->skin->feedback( 'downloading_package', $package );

		$download_file = download_url( $package, 300, $check_signatures );

		if ( is_wp_error( $download_file ) && ! $download_file->get_error_data( 'softfail-filename' ) ) {
			return new WP_Error( 'download_failed', $this->strings['download_failed'], $download_file->get_error_message() );
		}

		return $download_file;
	}

	/**
	 * Unpack a compressed package file.
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
	 *
	 * @param string $package        Full path to the package file.
	 * @param bool   $delete_package Optional. Whether to delete the package file after attempting
	 *                               to unpack it. Default true.
	 * @return string|WP_Error The path to the unpacked contents, or a WP_Error on failure.
	 */
	public function unpack_package( $package, $delete_package = true ) {
		global $wp_filesystem;

		$this->skin->feedback( 'unpack_package' );

		$upgrade_folder = $wp_filesystem->wp_content_dir() . 'upgrade/';

		// Clean up contents of upgrade directory beforehand.
		$upgrade_files = $wp_filesystem->dirlist( $upgrade_folder );
		if ( ! empty( $upgrade_files ) ) {
			foreach ( $upgrade_files as $file ) {
				$wp_filesystem->delete( $upgrade_folder . $file['name'], true );
			}
		}

		// We need a working directory - strip off any .tmp or .zip suffixes.
		$working_dir = $upgrade_folder . basename( basename( $package, '.tmp' ), '.zip' );

		// Clean up working directory.
		if ( $wp_filesystem->is_dir( $working_dir ) ) {
			$wp_filesystem->delete( $working_dir, true );
		}

		// Unzip package to working directory.
		$result = unzip_file( $package, $working_dir );

		// Once extracted, delete the package if required.
		if ( $delete_package ) {
			unlink( $package );
		}

		if ( is_wp_error( $result ) ) {
			$wp_filesystem->delete( $working_dir, true );
			if ( 'incompatible_archive' === $result->get_error_code() ) {
				return new WP_Error( 'incompatible_archive', $this->strings['incompatible_archive'], $result->get_error_data() );
			}
			return $result;
		}

		return $working_dir;
	}

	/**
	 * Flatten the results of WP_Filesystem::dirlist() for iterating over.
	 *
	 * @since 4.9.0
	 * @access protected
	 *
	 * @param array  $nested_files Array of files as returned by WP_Filesystem::dirlist().
	 * @param string $path         Relative path to prepend to child nodes. Optional.
	 * @return array A flattened array of the $nested_files specified.
	 */
	protected function flatten_dirlist( $nested_files, $path = '' ) {
		$files = array();

		foreach ( $nested_files as $name => $details ) {
			$files[ $path . $name ] = $details;

			// Append children recursively.
			if ( ! empty( $details['files'] ) ) {
				$children = $this->flatten_dirlist( $details['files'], $path . $name . '/' );

				// Merge keeping possible numeric keys, which array_merge() will reindex from 0..n.
				$files = $files + $children;
			}
		}

		return $files;
	}

	/**
	 * Clears the directory where this item is going to be installed into.
	 *
	 * @since 4.3.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem WordPress filesystem subclass.
	 *
	 * @param string $remote_destination The location on the remote filesystem to be cleared
	 * @return bool|WP_Error True upon success, WP_Error on failure.
	 */
	public function clear_destination( $remote_destination ) {
		global $wp_filesystem;

		$files = $wp_filesystem->dirlist( $remote_destination, true, true );

		// False indicates that the $remote_destination doesn't exist.
		if ( false === $files ) {
			return true;
		}

		// Flatten the file list to iterate over.
		$files = $this->flatten_dirlist( $files );

		// Check all files are writable before attempting to clear the destination.
		$unwritable_files = array();

		// Check writability.
		foreach ( $files as $filename => $file_details ) {
			if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
				// Attempt to alter permissions to allow writes and try again.
				$wp_filesystem->chmod( $remote_destination . $filename, ( 'd' === $file_details['type'] ? FS_CHMOD_DIR : FS_CHMOD_FILE ) );
				if ( ! $wp_filesystem->is_writable( $remote_destination . $filename ) ) {
					$unwritable_files[] = $filename;
				}
			}
		}

		if ( ! empty( $unwritable_files ) ) {
			return new WP_Error( 'files_not_writable', $this->strings['files_not_writable'], implode( ', ', $unwritable_files ) );
		}

		if ( ! $wp_filesystem->delete( $remote_destination, true ) ) {
			return new WP_Error( 'remove_old_failed', $this->strings['remove_old_failed'] );
		}

		return true;
	}

	/**
	 * Install a package.
	 *
	 * Copies the contents of a package form a source directory, and installs them in
	 * a destination directory. Optionally removes the source. It can also optionally
	 * clear out the destination folder if it already exists.
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem        WordPress filesystem subclass.
	 * @global array              $wp_theme_directories
	 *
	 * @param array|string $args {
	 *     Optional. Array or string of arguments for installing a package. Default empty array.
	 *
	 *     @type string $source                      Required path to the package source. Default empty.
	 *     @type string $destination                 Required path to a folder to install the package in.
	 *                                               Default empty.
	 *     @type bool   $clear_destination           Whether to delete any files already in the destination
	 *                                               folder. Default false.
	 *     @type bool   $clear_working               Whether to delete the files form the working directory
	 *                                               after copying to the destination. Default false.
	 *     @type bool   $abort_if_destination_exists Whether to abort the installation if
	 *                                               the destination folder already exists. Default true.
	 *     @type array  $hook_extra                  Extra arguments to pass to the filter hooks called by
	 *                                               WP_Upgrader::install_package(). Default empty array.
	 * }
	 *
	 * @return array|WP_Error The result (also stored in `WP_Upgrader::$result`), or a WP_Error on failure.
	 */
	public function install_package( $args = array() ) {
		global $wp_filesystem, $wp_theme_directories;

		$defaults = array(
			'source'                      => '', // Please always pass this.
			'destination'                 => '', // ...and this.
			'clear_destination'           => false,
			'clear_working'               => false,
			'abort_if_destination_exists' => true,
			'hook_extra'                  => array(),
		);

		$args = wp_parse_args( $args, $defaults );

		// These were previously extract()'d.
		$source            = $args['source'];
		$destination       = $args['destination'];
		$clear_destination = $args['clear_destination'];

		set_time_limit( 300 );

		if ( empty( $source ) || empty( $destination ) ) {
			return new WP_Error( 'bad_request', $this->strings['bad_request'] );
		}
		$this->skin->feedback( 'installing_package' );

		/**
		 * Filters the install response before the installation has started.
		 *
		 * Returning a truthy value, or one that could be evaluated as a WP_Error
		 * will effectively short-circuit the installation, returning that value
		 * instead.
		 *
		 * @since 2.8.0
		 *
		 * @param bool|WP_Error $response   Response.
		 * @param array         $hook_extra Extra arguments passed to hooked filters.
		 */
		$res = apply_filters( 'upgrader_pre_install', true, $args['hook_extra'] );

		if ( is_wp_error( $res ) ) {
			return $res;
		}

		// Retain the original source and destinations.
		$remote_source     = $args['source'];
		$local_destination = $destination;

		$source_files       = array_keys( $wp_filesystem->dirlist( $remote_source ) );
		$remote_destination = $wp_filesystem->find_folder( $local_destination );

		// Locate which directory to copy to the new folder. This is based on the actual folder holding the files.
		if ( 1 === count( $source_files ) && $wp_filesystem->is_dir( trailingslashit( $args['source'] ) . $source_files[0] . '/' ) ) {
			// Only one folder? Then we want its contents.
			$source = trailingslashit( $args['source'] ) . trailingslashit( $source_files[0] );
		} elseif ( count( $source_files ) == 0 ) {
			// There are no files?
			return new WP_Error( 'incompatible_archive_empty', $this->strings['incompatible_archive'], $this->strings['no_files'] );
		} else {
			// It's only a single file, the upgrader will use the folder name of this file as the destination folder.
			// Folder name is based on zip filename.
			$source = trailingslashit( $args['source'] );
		}

		/**
		 * Filters the source file location for the upgrade package.
		 *
		 * @since 2.8.0
		 * @since 4.4.0 The $hook_extra parameter became available.
		 *
		 * @param string      $source        File source location.
		 * @param string      $remote_source Remote file source location.
		 * @param WP_Upgrader $this          WP_Upgrader instance.
		 * @param array       $hook_extra    Extra arguments passed to hooked filters.
		 */
		$source = apply_filters( 'upgrader_source_selection', $source, $remote_source, $this, $args['hook_extra'] );

		if ( is_wp_error( $source ) ) {
			return $source;
		}

		// Has the source location changed? If so, we need a new source_files list.
		if ( $source !== $remote_source ) {
			$source_files = array_keys( $wp_filesystem->dirlist( $source ) );
		}

		/*
		 * Protection against deleting files in any important base directories.
		 * Theme_Upgrader & Plugin_Upgrader also trigger this, as they pass the
		 * destination directory (WP_PLUGIN_DIR / wp-content/themes) intending
		 * to copy the directory into the directory, whilst they pass the source
		 * as the actual files to copy.
		 */
		$protected_directories = array( ABSPATH, WP_CONTENT_DIR, WP_PLUGIN_DIR, WP_CONTENT_DIR . '/themes' );

		if ( is_array( $wp_theme_directories ) ) {
			$protected_directories = array_merge( $protected_directories, $wp_theme_directories );
		}

		if ( in_array( $destination, $protected_directories, true ) ) {
			$remote_destination = trailingslashit( $remote_destination ) . trailingslashit( basename( $source ) );
			$destination        = trailingslashit( $destination ) . trailingslashit( basename( $source ) );
		}

		if ( $clear_destination ) {
			// We're going to clear the destination if there's something there.
			$this->skin->feedback( 'remove_old' );

			$removed = $this->clear_destination( $remote_destination );

			/**
			 * Filters whether the upgrader cleared the destination.
			 *
			 * @since 2.8.0
			 *
			 * @param true|WP_Error $removed            Whether the destination was cleared. true upon success, WP_Error on failure.
			 * @param string        $local_destination  The local package destination.
			 * @param string        $remote_destination The remote package destination.
			 * @param array         $hook_extra         Extra arguments passed to hooked filters.
			 */
			$removed = apply_filters( 'upgrader_clear_destination', $removed, $local_destination, $remote_destination, $args['hook_extra'] );

			if ( is_wp_error( $removed ) ) {
				return $removed;
			}
		} elseif ( $args['abort_if_destination_exists'] && $wp_filesystem->exists( $remote_destination ) ) {
			// If we're not clearing the destination folder and something exists there already, bail.
			// But first check to see if there are actually any files in the folder.
			$_files = $wp_filesystem->dirlist( $remote_destination );
			if ( ! empty( $_files ) ) {
				$wp_filesystem->delete( $remote_source, true ); // Clear out the source files.
				return new WP_Error( 'folder_exists', $this->strings['folder_exists'], $remote_destination );
			}
		}

		// Create destination if needed.
		if ( ! $wp_filesystem->exists( $remote_destination ) ) {
			if ( ! $wp_filesystem->mkdir( $remote_destination, FS_CHMOD_DIR ) ) {
				return new WP_Error( 'mkdir_failed_destination', $this->strings['mkdir_failed'], $remote_destination );
			}
		}

		// Copy new version of item into place.
		$result = copy_dir( $source, $remote_destination );
		if ( is_wp_error( $result ) ) {
			if ( $args['clear_working'] ) {
				$wp_filesystem->delete( $remote_source, true );
			}
			return $result;
		}

		// Clear the working folder?
		if ( $args['clear_working'] ) {
			$wp_filesystem->delete( $remote_source, true );
		}

		$destination_name = basename( str_replace( $local_destination, '', $destination ) );
		if ( '.' === $destination_name ) {
			$destination_name = '';
		}

		$this->result = compact( 'source', 'source_files', 'destination', 'destination_name', 'local_destination', 'remote_destination', 'clear_destination' );

		/**
		 * Filters the installation response after the installation has finished.
		 *
		 * @since 2.8.0
		 *
		 * @param bool  $response   Installation response.
		 * @param array $hook_extra Extra arguments passed to hooked filters.
		 * @param array $result     Installation result data.
		 */
		$res = apply_filters( 'upgrader_post_install', true, $args['hook_extra'], $this->result );

		if ( is_wp_error( $res ) ) {
			$this->result = $res;
			return $res;
		}

		// Bombard the calling function will all the info which we've just used.
		return $this->result;
	}

	/**
	 * Run an upgrade/installation.
	 *
	 * Attempts to download the package (if it is not a local file), unpack it, and
	 * install it in the destination folder.
	 *
	 * @since 2.8.0
	 *
	 * @param array $options {
	 *     Array or string of arguments for upgrading/installing a package.
	 *
	 *     @type string $package                     The full path or URI of the package to install.
	 *                                               Default empty.
	 *     @type string $destination                 The full path to the destination folder.
	 *                                               Default empty.
	 *     @type bool   $clear_destination           Whether to delete any files already in the
	 *                                               destination folder. Default false.
	 *     @type bool   $clear_working               Whether to delete the files form the working
	 *                                               directory after copying to the destination.
	 *                                               Default false.
	 *     @type bool   $abort_if_destination_exists Whether to abort the installation if the destination
	 *                                               folder already exists. When true, `$clear_destination`
	 *                                               should be false. Default true.
	 *     @type bool   $is_multi                    Whether this run is one of multiple upgrade/installation
	 *                                               actions being performed in bulk. When true, the skin
	 *                                               WP_Upgrader::header() and WP_Upgrader::footer()
	 *                                               aren't called. Default false.
	 *     @type array  $hook_extra                  Extra arguments to pass to the filter hooks called by
	 *                                               WP_Upgrader::run().
	 * }
	 * @return array|false|WP_Error The result from self::install_package() on success, otherwise a WP_Error,
	 *                              or false if unable to connect to the filesystem.
	 */
	public function run( $options ) {

		$defaults = array(
			'package'                     => '', // Please always pass this.
			'destination'                 => '', // ...and this.
			'clear_destination'           => false,
			'abort_if_destination_exists' => true, // Abort if the destination directory exists. Pass clear_destination as false please.
			'clear_working'               => true,
			'is_multi'                    => false,
			'hook_extra'                  => array(), // Pass any extra $hook_extra args here, this will be passed to any hooked filters.
		);

		$options = wp_parse_args( $options, $defaults );

		/**
		 * Filters the package options before running an update.
		 *
		 * See also {@see 'upgrader_process_complete'}.
		 *
		 * @since 4.3.0
		 *
		 * @param array $options {
		 *     Options used by the upgrader.
		 *
		 *     @type string $package                     Package for update.
		 *     @type string $destination                 Update location.
		 *     @type bool   $clear_destination           Clear the destination resource.
		 *     @type bool   $clear_working               Clear the working resource.
		 *     @type bool   $abort_if_destination_exists Abort if the Destination directory exists.
		 *     @type bool   $is_multi                    Whether the upgrader is running multiple times.
		 *     @type array  $hook_extra {
		 *         Extra hook arguments.
		 *
		 *         @type string $action               Type of action. Default 'update'.
		 *         @type string $type                 Type of update process. Accepts 'plugin', 'theme', or 'core'.
		 *         @type bool   $bulk                 Whether the update process is a bulk update. Default true.
		 *         @type string $plugin               Path to the plugin file relative to the plugins directory.
		 *         @type string $theme                The stylesheet or template name of the theme.
		 *         @type string $language_update_type The language pack update type. Accepts 'plugin', 'theme',
		 *                                            or 'core'.
		 *         @type object $language_update      The language pack update offer.
		 *     }
		 * }
		 */
		$options = apply_filters( 'upgrader_package_options', $options );

		if ( ! $options['is_multi'] ) { // Call $this->header separately if running multiple times.
			$this->skin->header();
		}

		// Connect to the filesystem first.
		$res = $this->fs_connect( array( WP_CONTENT_DIR, $options['destination'] ) );
		// Mainly for non-connected filesystem.
		if ( ! $res ) {
			if ( ! $options['is_multi'] ) {
				$this->skin->footer();
			}
			return false;
		}

		$this->skin->before();

		if ( is_wp_error( $res ) ) {
			$this->skin->error( $res );
			$this->skin->after();
			if ( ! $options['is_multi'] ) {
				$this->skin->footer();
			}
			return $res;
		}

		/*
		 * Download the package (Note, This just returns the filename
		 * of the file if the package is a local file)
		 */
		$download = $this->download_package( $options['package'], true, $options['hook_extra'] );

		// Allow for signature soft-fail.
		// WARNING: This may be removed in the future.
		if ( is_wp_error( $download ) && $download->get_error_data( 'softfail-filename' ) ) {

			// Don't output the 'no signature could be found' failure message for now.
			if ( 'signature_verification_no_signature' !== $download->get_error_code() || WP_DEBUG ) {
				// Output the failure error as a normal feedback, and not as an error.
				$this->skin->feedback( $download->get_error_message() );

				// Report this failure back to WordPress.org for debugging purposes.
				wp_version_check(
					array(
						'signature_failure_code' => $download->get_error_code(),
						'signature_failure_data' => $download->get_error_data(),
					)
				);
			}

			// Pretend this error didn't happen.
			$download = $download->get_error_data( 'softfail-filename' );
		}

		if ( is_wp_error( $download ) ) {
			$this->skin->error( $download );
			$this->skin->after();
			if ( ! $options['is_multi'] ) {
				$this->skin->footer();
			}
			return $download;
		}

		$delete_package = ( $download != $options['package'] ); // Do not delete a "local" file.

		// Unzips the file into a temporary directory.
		$working_dir = $this->unpack_package( $download, $delete_package );
		if ( is_wp_error( $working_dir ) ) {
			$this->skin->error( $working_dir );
			$this->skin->after();
			if ( ! $options['is_multi'] ) {
				$this->skin->footer();
			}
			return $working_dir;
		}

		// With the given options, this installs it to the destination directory.
		$result = $this->install_package(
			array(
				'source'                      => $working_dir,
				'destination'                 => $options['destination'],
				'clear_destination'           => $options['clear_destination'],
				'abort_if_destination_exists' => $options['abort_if_destination_exists'],
				'clear_working'               => $options['clear_working'],
				'hook_extra'                  => $options['hook_extra'],
			)
		);

		$this->skin->set_result( $result );
		if ( is_wp_error( $result ) ) {
			$this->skin->error( $result );

			if ( ! method_exists( $this->skin, 'hide_process_failed' ) || ! $this->skin->hide_process_failed( $result ) ) {
				$this->skin->feedback( 'process_failed' );
			}
		} else {
			// Installation succeeded.
			$this->skin->feedback( 'process_success' );
		}

		$this->skin->after();

		if ( ! $options['is_multi'] ) {

			/**
			 * Fires when the upgrader process is complete.
			 *
			 * See also {@see 'upgrader_package_options'}.
			 *
			 * @since 3.6.0
			 * @since 3.7.0 Added to WP_Upgrader::run().
			 * @since 4.6.0 `$translations` was added as a possible argument to `$hook_extra`.
			 *
			 * @param WP_Upgrader $this WP_Upgrader instance. In other contexts, $this, might be a
			 *                          Theme_Upgrader, Plugin_Upgrader, Core_Upgrade, or Language_Pack_Upgrader instance.
			 * @param array       $hook_extra {
			 *     Array of bulk item update data.
			 *
			 *     @type string $action       Type of action. Default 'update'.
			 *     @type string $type         Type of update process. Accepts 'plugin', 'theme', 'translation', or 'core'.
			 *     @type bool   $bulk         Whether the update process is a bulk update. Default true.
			 *     @type array  $plugins      Array of the basename paths of the plugins' main files.
			 *     @type array  $themes       The theme slugs.
			 *     @type array  $translations {
			 *         Array of translations update data.
			 *
			 *         @type string $language The locale the translation is for.
			 *         @type string $type     Type of translation. Accepts 'plugin', 'theme', or 'core'.
			 *         @type string $slug     Text domain the translation is for. The slug of a theme/plugin or
			 *                                'default' for core translations.
			 *         @type string $version  The version of a theme, plugin, or core.
			 *     }
			 * }
			 */
			do_action( 'upgrader_process_complete', $this, $options['hook_extra'] );

			$this->skin->footer();
		}

		return $result;
	}

	/**
	 * Toggle maintenance mode for the site.
	 *
	 * Creates/deletes the maintenance file to enable/disable maintenance mode.
	 *
	 * @since 2.8.0
	 *
	 * @global WP_Filesystem_Base $wp_filesystem Subclass
	 *
	 * @param bool $enable True to enable maintenance mode, false to disable.
	 */
	public function maintenance_mode( $enable = false ) {
		global $wp_filesystem;
		$file = $wp_filesystem->abspath() . '.maintenance';
		if ( $enable ) {
			$this->skin->feedback( 'maintenance_start' );
			// Create maintenance file to signal that we are upgrading.
			$maintenance_string = '<?php $upgrading = ' . time() . '; ?>';
			$wp_filesystem->delete( $file );
			$wp_filesystem->put_contents( $file, $maintenance_string, FS_CHMOD_FILE );
		} elseif ( ! $enable && $wp_filesystem->exists( $file ) ) {
			$this->skin->feedback( 'maintenance_end' );
			$wp_filesystem->delete( $file );
		}
	}

	/**
	 * Creates a lock using WordPress options.
	 *
	 * @since 4.5.0
	 *
	 * @param string $lock_name       The name of this unique lock.
	 * @param int    $release_timeout Optional. The duration in seconds to respect an existing lock.
	 *                                Default: 1 hour.
	 * @return bool False if a lock couldn't be created or if the lock is still valid. True otherwise.
	 */
	public static function create_lock( $lock_name, $release_timeout = null ) {
		global $wpdb;
		if ( ! $release_timeout ) {
			$release_timeout = HOUR_IN_SECONDS;
		}
		$lock_option = $lock_name . '.lock';

		// Try to lock.
		$lock_result = $wpdb->query( $wpdb->prepare( "INSERT IGNORE INTO `$wpdb->options` ( `option_name`, `option_value`, `autoload` ) VALUES (%s, %s, 'no') /* LOCK */", $lock_option, time() ) );

		if ( ! $lock_result ) {
			$lock_result = get_option( $lock_option );

			// If a lock couldn't be created, and there isn't a lock, bail.
			if ( ! $lock_result ) {
				return false;
			}

			// Check to see if the lock is still valid. If it is, bail.
			if ( $lock_result > ( time() - $release_timeout ) ) {
				return false;
			}

			// There must exist an expired lock, clear it and re-gain it.
			WP_Upgrader::release_lock( $lock_name );

			return WP_Upgrader::create_lock( $lock_name, $release_timeout );
		}

		// Update the lock, as by this point we've definitely got a lock, just need to fire the actions.
		update_option( $lock_option, time() );

		return true;
	}

	/**
	 * Releases an upgrader lock.
	 *
	 * @since 4.5.0
	 *
	 * @see WP_Upgrader::create_lock()
	 *
	 * @param string $lock_name The name of this unique lock.
	 * @return bool True if the lock was successfully released. False on failure.
	 */
	public static function release_lock( $lock_name ) {
		return delete_option( $lock_name . '.lock' );
	}

}

/** Plugin_Upgrader class */
require_once ABSPATH . 'wp-admin/includes/class-plugin-upgrader.php';

/** Theme_Upgrader class */
require_once ABSPATH . 'wp-admin/includes/class-theme-upgrader.php';

/** Language_Pack_Upgrader class */
require_once ABSPATH . 'wp-admin/includes/class-language-pack-upgrader.php';

/** Core_Upgrader class */
require_once ABSPATH . 'wp-admin/includes/class-core-upgrader.php';

/** File_Upload_Upgrader class */
require_once ABSPATH . 'wp-admin/includes/class-file-upload-upgrader.php';

/** WP_Automatic_Updater class */
require_once ABSPATH . 'wp-admin/includes/class-wp-automatic-updater.php';