<?php

/**

 * Theme file editor administration panel.

 *

 * @package WordPress

 * @subpackage Administration

 */

/** WordPress Administration Bootstrap */

require_once __DIR__ . '/admin.php';

if ( is_multisite() && ! is_network_admin() ) {

	wp_redirect( network_admin_url( 'theme-editor.php' ) );

	exit;

}

if ( ! current_user_can( 'edit_themes' ) ) {

	wp_die( '<p>' . __( 'Sorry, you are not allowed to edit templates for this site.' ) . '</p>' );

}

// Used in the HTML title tag.

$title       = __( 'Edit Themes' );

$parent_file = 'themes.php';

get_current_screen()->add_help_tab(

	array(

		'id'      => 'overview',

		'title'   => __( 'Overview' ),

		'content' =>

				'<p>' . __( 'You can use the theme file editor to edit the individual CSS and PHP files which make up your theme.' ) . '</p>' .

				'<p>' . __( 'Begin by choosing a theme to edit from the dropdown menu and clicking the Select button. A list then appears of the theme&#8217;s template files. Clicking once on any file name causes the file to appear in the large Editor box.' ) . '</p>' .

				'<p>' . __( 'For PHP files, you can use the documentation dropdown to select from functions recognized in that file. Look Up takes you to a web page with reference material about that particular function.' ) . '</p>' .

				'<p id="editor-keyboard-trap-help-1">' . __( 'When using a keyboard to navigate:' ) . '</p>' .

				'<ul>' .

				'<li id="editor-keyboard-trap-help-2">' . __( 'In the editing area, the Tab key enters a tab character.' ) . '</li>' .

				'<li id="editor-keyboard-trap-help-3">' . __( 'To move away from this area, press the Esc key followed by the Tab key.' ) . '</li>' .

				'<li id="editor-keyboard-trap-help-4">' . __( 'Screen reader users: when in forms mode, you may need to press the Esc key twice.' ) . '</li>' .

				'</ul>' .

				'<p>' . __( 'After typing in your edits, click Update File.' ) . '</p>' .

				'<p>' . __( '<strong>Advice:</strong> Think very carefully about your site crashing if you are live-editing the theme currently in use.' ) . '</p>' .

				'<p>' . sprintf(

					/* translators: %s: Link to documentation on child themes. */

					__( 'Upgrading to a newer version of the same theme will override changes made here. To avoid this, consider creating a <a href="%s">child theme</a> instead.' ),

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

				) . '</p>' .

				( is_network_admin() ? '<p>' . __( 'Any edits to files from this screen will be reflected on all sites in the network.' ) . '</p>' : '' ),

	)

);

get_current_screen()->set_help_sidebar(

	'<p><strong>' . __( 'For more information:' ) . '</strong></p>' .

	'<p>' . __( '<a href="https://developer.wordpress.org/themes/">Documentation on Theme Development</a>' ) . '</p>' .

	'<p>' . __( '<a href="https://developer.wordpress.org/themes/basics/template-tags/">Documentation on Template Tags</a>' ) . '</p>' .

);

if ( $theme ) {

	$stylesheet = $theme;

} else {

	$stylesheet = get_stylesheet();

}

$theme = wp_get_theme( $stylesheet );

if ( ! $theme->exists() ) {

	wp_die( __( 'The requested theme does not exist.' ) );

}

if ( $theme->errors() && 'theme_no_stylesheet' === $theme->errors()->get_error_code() ) {

	wp_die( __( 'The requested theme does not exist.' ) . ' ' . $theme->errors()->get_error_message() );

}

$allowed_files = array();

$style_files   = array();

$file_types = wp_get_theme_file_editable_extensions( $theme );

foreach ( $file_types as $type ) {

	switch ( $type ) {

		case 'php':

			$allowed_files += $theme->get_files( 'php', -1 );

			break;

		case 'css':

			$style_files                = $theme->get_files( 'css', -1 );

			$allowed_files['style.css'] = $style_files['style.css'];

			$allowed_files             += $style_files;

			break;

		default:

			$allowed_files += $theme->get_files( $type, -1 );

			break;

	}

}

// Move functions.php and style.css to the top.

if ( isset( $allowed_files['functions.php'] ) ) {

	$allowed_files = array( 'functions.php' => $allowed_files['functions.php'] ) + $allowed_files;

}

if ( isset( $allowed_files['style.css'] ) ) {

	$allowed_files = array( 'style.css' => $allowed_files['style.css'] ) + $allowed_files;

}

if ( empty( $file ) ) {

	$relative_file = 'style.css';

	$file          = $allowed_files['style.css'];

} else {

	$relative_file = wp_unslash( $file );

	$file          = $theme->get_stylesheet_directory() . '/' . $relative_file;

}

validate_file_to_edit( $file, $allowed_files );

// Handle fallback editing of file when JavaScript is not available.

$edit_error     = null;

$posted_content = null;

if ( 'POST' === $_SERVER['REQUEST_METHOD'] ) {

	$r = wp_edit_theme_plugin_file( wp_unslash( $_POST ) );

	if ( is_wp_error( $r ) ) {

		$edit_error = $r;

		if ( check_ajax_referer( 'edit-theme_' . $stylesheet . '_' . $relative_file, 'nonce', false ) && isset( $_POST['newcontent'] ) ) {

			$posted_content = wp_unslash( $_POST['newcontent'] );

		}

	} else {

		wp_redirect(

			add_query_arg(

				array(

					'a'     => 1, // This means "success" for some reason.

					'theme' => $stylesheet,

					'file'  => $relative_file,

				),

				admin_url( 'theme-editor.php' )

			)

		);

		exit;

	}

}

$settings = array(

	'codeEditor' => wp_enqueue_code_editor( compact( 'file' ) ),

);

wp_enqueue_script( 'wp-theme-plugin-editor' );

wp_add_inline_script( 'wp-theme-plugin-editor', sprintf( 'jQuery( function( $ ) { wp.themePluginEditor.init( $( "#template" ), %s ); } )', wp_json_encode( $settings ) ) );

wp_add_inline_script( 'wp-theme-plugin-editor', 'wp.themePluginEditor.themeOrPlugin = "theme";' );

require_once ABSPATH . 'wp-admin/admin-header.php';

update_recently_edited( $file );

if ( ! is_file( $file ) ) {

	$error = true;

}

$content = '';

if ( ! empty( $posted_content ) ) {

	$content = $posted_content;

} elseif ( ! $error && filesize( $file ) > 0 ) {

	$f       = fopen( $file, 'r' );

	$content = fread( $f, filesize( $file ) );

		$functions = wp_doc_link_parse( $content );

		}

	}

	$content = esc_textarea( $content );

}

$file_description = get_file_description( $relative_file );

$file_show        = array_search( $file, array_filter( $allowed_files ), true );

$description      = esc_html( $file_description );

if ( $file_description !== $file_show ) {

	$description .= ' <span>(' . esc_html( $file_show ) . ')</span>';

}

?>

<div class="wrap">

<h1><?php echo esc_html( $title ); ?></h1>

<div class="fileedit-sub">

<div class="alignleft">

<h2>

	<?php

	echo $theme->display( 'Name' );

	if ( $description ) {

	?>

</h2>

</div>

<div class="alignright">

	<form action="theme-editor.php" method="get">

		<label for="theme" id="theme-plugin-editor-selector"><?php _e( 'Select theme to edit:' ); ?> </label>

		<select name="theme" id="theme">

		<?php

		foreach ( wp_get_themes( array( 'errors' => null ) ) as $a_stylesheet => $a_theme ) {

			if ( $a_theme->errors() && 'theme_no_stylesheet' === $a_theme->errors()->get_error_code() ) {

				continue;

			}

			$selected = ( $a_stylesheet === $stylesheet ) ? ' selected="selected"' : '';

			echo "\n\t" . '<option value="' . esc_attr( $a_stylesheet ) . '"' . $selected . '>' . $a_theme->display( 'Name' ) . '</option>';

		}

		?>

		</select>

		<?php submit_button( __( 'Select' ), '', 'Submit', false ); ?>

	</form>

</div>

<br class="clear" />

</div>

<?php

if ( $theme->errors() ) {

}

?>

<div id="templateside">

	<h2 id="theme-files-label"><?php _e( 'Theme Files' ); ?></h2>

	<ul role="tree" aria-labelledby="theme-files-label">

		<?php if ( $theme->parent() ) : ?>

			<li class="howto">

				<?php

				printf(

					/* translators: %s: Link to edit parent theme. */

					__( 'This child theme inherits templates from a parent theme, %s.' ),

					sprintf(

						'<a href="%s">%s</a>',

						self_admin_url( 'theme-editor.php?theme=' . urlencode( $theme->get_template() ) ),

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

					)

				);

				?>

			</li>

		<?php endif; ?>

		<li role="treeitem" tabindex="-1" aria-expanded="true" aria-level="1" aria-posinset="1" aria-setsize="1">

			<ul role="group">

				<?php wp_print_theme_file_tree( wp_make_theme_file_tree( $allowed_files ) ); ?>

			</ul>

		</li>

	</ul>

</div>

<?php

if ( $error ) :

else :

	?>

	<form name="template" id="template" action="theme-editor.php" method="post">

		<?php wp_nonce_field( 'edit-theme_' . $stylesheet . '_' . $relative_file, 'nonce' ); ?>

		<div>

			<label for="newcontent" id="theme-plugin-editor-label"><?php _e( 'Selected file content:' ); ?></label>

			<textarea cols="70" rows="30" name="newcontent" id="newcontent" aria-describedby="editor-keyboard-trap-help-1 editor-keyboard-trap-help-2 editor-keyboard-trap-help-3 editor-keyboard-trap-help-4"><?php echo $content; ?></textarea>

			<input type="hidden" name="action" value="update" />

			<input type="hidden" name="file" value="<?php echo esc_attr( $relative_file ); ?>" />

			<input type="hidden" name="theme" value="<?php echo esc_attr( $theme->get_stylesheet() ); ?>" />

		</div>

		<?php if ( ! empty( $functions ) ) : ?>

			<div id="documentation" class="hide-if-no-js">

				<label for="docs-list"><?php _e( 'Documentation:' ); ?></label>

				<?php echo $docs_select; ?>

			</div>

		<?php endif; ?>

		<div>

			<div class="editor-notices">

			</div>

				<p class="submit">

					<?php submit_button( __( 'Update File' ), 'primary', 'submit', false ); ?>

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

				</p>

				<p>

					<?php

					printf(

						/* translators: %s: Documentation URL. */

						__( 'You need to make this file writable before you can save your changes. See <a href="%s">Changing File Permissions</a> for more information.' ),

					);

					?>

				</p>

		</div>

		<?php wp_print_file_editor_templates(); ?>

	</form>

	<?php