<?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
*
* @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;
}

$blog_id = get_current_blog_id();
if ( is_multisite() ) {
if ( current_user_can( 'install_themes' ) && current_user_can( 'manage_network_themes' ) ) {
printf(
/* translators: 1: URL to Themes tab on Edit Site screen, 2: URL to Add Themes screen. */
__( 'You only have one theme enabled for this site right now. Visit the Network Admin to <a href="%1$s">enable</a> or <a href="%2$s">install</a> 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 <a href="%s">enable</a> 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 <a href="%s">Install Themes</a> tab above.' ),
admin_url( 'theme-install.php' )
);

return;
}
}
// Fallthrough.
printf(
/* translators: %s: Network title. */
__( 'Only the active 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 ); ?>
<span class="spinner"></span>
<br class="clear" />
</div>
<?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' ); ?>

<div id="availablethemes">
<?php $this->display_rows_or_placeholder(); ?>
</div>

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

/**
* @return string[] Array of column titles keyed by their column name.
*/
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>';
}
}

/**
* Generates the list table rows.
*
* @since 3.1.0
*/
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&amp;template=' . urlencode( $template ) . '&amp;stylesheet=' . urlencode( $stylesheet ), 'switch-theme_' . $stylesheet );

$actions = array();
$actions['activate'] = sprintf(
'<a href="%s" class="activatelink" aria-label="%s">%s</a>',
$activate_link,
/* translators: %s: Theme name. */
esc_attr( sprintf( _x( 'Activate &#8220;%s&#8221;', 'theme' ), $title ) ),
_x( 'Activate', 'theme' )
);

if ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) {
$actions['preview'] .= sprintf(
'<a href="%s" class="load-customize hide-if-no-customize">%s</a>',
wp_customize_url( $stylesheet ),
__( 'Live Preview' )
);
}

if ( ! is_multisite() && current_user_can( 'delete_themes' ) ) {
$actions['delete'] = sprintf(
'<a class="submitdelete deletion" href="%s" onclick="return confirm( \'%s\' );">%s</a>',
wp_nonce_url( 'themes.php?action=delete&amp;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'] ) ? '<div class="delete-theme">' . $actions['delete'] . '</div>' : '';
unset( $actions['delete'] );

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

<span class="screenshot hide-if-customize">
<?php if ( $screenshot ) : ?>
<img src="<?php echo esc_url( $screenshot . '?ver=' . $theme->version ); ?>" alt="" />
<?php endif; ?>
</span>
<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 . '?ver=' . $theme->version ); ?>" alt="" />
<?php endif; ?>
</a>

<h3><?php echo $title; ?></h3>
<div class="theme-author">
<?php
/* translators: %s: Theme author. */
printf( __( 'By %s' ), $author );
?>
</div>
<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 ( $theme->parent() ) {
printf(
/* translators: 1: Link to documentation on child themes, 2: Name of parent theme. */
' <p class="howto">' . __( 'This <a href="%1$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 ) {
// 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( "<script type='text/javascript'>var theme_list_args = %s;</script>\n", wp_json_encode( $args ) );
parent::_js_vars();
}
}