<?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' ) ) {

				return;

			} elseif ( current_user_can( 'manage_network_themes' ) ) {

				return;

			}

			// Else, fallthrough. install_themes doesn't help if you can't enable it.

		} else {

			if ( current_user_can( 'install_themes' ) ) {

				return;

			}

		}

		// Fallthrough.

	}

	/**

	 * @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 ); ?>

			<span class="spinner"></span>

			<br class="clear" />

		</div>

		<?php

	}

	/**

	 */

	public function display() {

		wp_nonce_field( 'fetch-list-' . get_class( $this ), '_ajax_fetch_list_nonce' );

		?>

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

		<div id="availablethemes">

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

		</div>

		<?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 '<div class="no-items">';

			$this->no_items();

			echo '</div>';

		}

	}

	/**

	 */

	public function display_rows() {

		$themes = $this->items;

		foreach ( $themes as $theme ) :

			?>

			<div class="available-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();

			if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {

			}

			if ( ! is_multisite() && current_user_can( 'delete_themes' ) ) {

			}

			/** 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 */

			$delete_action = isset( $actions['delete'] ) ? '<div class="delete-theme">' . $actions['delete'] . '</div>' : '';

			unset( $actions['delete'] );

			?>

			<span class="screenshot hide-if-customize">

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

				<?php endif; ?>

			</span>

			<a href="<?php echo wp_customize_url( $stylesheet ); ?>" class="screenshot load-customize hide-if-no-customize">

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

				<?php endif; ?>

			</a>

			<h3><?php echo $title; ?></h3>

			<div class="action-links">

				<ul>

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

						<li><?php echo $action; ?></li>

					<?php endforeach; ?>

					<li class="hide-if-no-js"><a href="#" class="theme-detail"><?php _e( 'Details' ); ?></a></li>

				</ul>

				<?php echo $delete_action; ?>

				<?php theme_update_available( $theme ); ?>

			</div>

			<div class="themedetaildiv hide-if-js">

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

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

				<?php

				if ( $theme->parent() ) {

					printf(

						' <p class="howto">' . __( 'This <a href="%1$s">child theme</a> requires its parent theme, %2$s.' ) . '</p>',

						__( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ),

						$theme->parent()->display( 'Name' )

					);

				}

				?>

			</div>

			</div>

			<?php

		endforeach;

	}

	/**

	 * @param WP_Theme $theme

	 * @return bool

	 */

	public function search_theme( $theme ) {

		foreach ( $this->features as $word ) {

				return false;

			}

		}

		foreach ( $this->search_terms as $word ) {

				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( "<script type='text/javascript'>var theme_list_args = %s;</script>\n", wp_json_encode( $args ) );

		parent::_js_vars();

	}

}