<?php

/**

 * Theme, template, and stylesheet functions.

 *

 * @package WordPress

 * @subpackage Template

 */

/**

 * Retrieve name of the current stylesheet.

 *

 * The theme name that the administrator has currently set the front end theme

 * as.

 *

 * For all extensive purposes, the template name and the stylesheet name are

 * going to be the same for most cases.

 *

 * @since 1.5.0

 * @uses apply_filters() Calls 'stylesheet' filter on stylesheet name.

 *

 * @return string Stylesheet name.

 */

function get_stylesheet() {

	return apply_filters('stylesheet', get_option('stylesheet'));

}

/**

 * Retrieve stylesheet directory path for current theme.

 *

 * @since 1.5.0

 * @uses apply_filters() Calls 'stylesheet_directory' filter on stylesheet directory and theme name.

 *

 * @return string Path to current theme directory.

 */

function get_stylesheet_directory() {

	$stylesheet = get_stylesheet();

	$theme_root = get_theme_root( $stylesheet );

	$stylesheet_dir = "$theme_root/$stylesheet";

	return apply_filters( 'stylesheet_directory', $stylesheet_dir, $stylesheet, $theme_root );

}

/**

 * Retrieve stylesheet directory URI.

 *

 * @since 1.5.0

 *

 * @return string

 */

function get_stylesheet_directory_uri() {

	$stylesheet = get_stylesheet();

	$theme_root_uri = get_theme_root_uri( $stylesheet );

	$stylesheet_dir_uri = "$theme_root_uri/$stylesheet";

	return apply_filters( 'stylesheet_directory_uri', $stylesheet_dir_uri, $stylesheet, $theme_root_uri );

}

/**

 * Retrieve URI of current theme stylesheet.

 *

 * The stylesheet file name is 'style.css' which is appended to {@link

 * get_stylesheet_directory_uri() stylesheet directory URI} path.

 *

 * @since 1.5.0

 * @uses apply_filters() Calls 'stylesheet_uri' filter on stylesheet URI path and stylesheet directory URI.

 *

 * @return string

 */

function get_stylesheet_uri() {

	$stylesheet_dir_uri = get_stylesheet_directory_uri();

	$stylesheet_uri = $stylesheet_dir_uri . "/style.css";

	return apply_filters('stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri);

}

/**

 * Retrieve localized stylesheet URI.

 *

 * The stylesheet directory for the localized stylesheet files are located, by

 * default, in the base theme directory. The name of the locale file will be the

 * locale followed by '.css'. If that does not exist, then the text direction

 * stylesheet will be checked for existence, for example 'ltr.css'.

 *

 * The theme may change the location of the stylesheet directory by either using

 * the 'stylesheet_directory_uri' filter or the 'locale_stylesheet_uri' filter.

 * If you want to change the location of the stylesheet files for the entire

 * WordPress workflow, then change the former. If you just have the locale in a

 * separate folder, then change the latter.

 *

 * @since 2.1.0

 * @uses apply_filters() Calls 'locale_stylesheet_uri' filter on stylesheet URI path and stylesheet directory URI.

 *

 * @return string

 */

function get_locale_stylesheet_uri() {

	global $wp_locale;

	$stylesheet_dir_uri = get_stylesheet_directory_uri();

	$dir = get_stylesheet_directory();

	$locale = get_locale();

	if ( file_exists("$dir/$locale.css") )

		$stylesheet_uri = "$stylesheet_dir_uri/$locale.css";

	elseif ( !empty($wp_locale->text_direction) && file_exists("$dir/{$wp_locale->text_direction}.css") )

		$stylesheet_uri = "$stylesheet_dir_uri/{$wp_locale->text_direction}.css";

	else

		$stylesheet_uri = '';

	return apply_filters('locale_stylesheet_uri', $stylesheet_uri, $stylesheet_dir_uri);

}

/**

 * Retrieve name of the current theme.

 *

 * @since 1.5.0

 * @uses apply_filters() Calls 'template' filter on template option.

 *

 * @return string Template name.

 */

function get_template() {

	return apply_filters('template', get_option('template'));

}

/**

 * Retrieve current theme directory.

 *

 * @since 1.5.0

 * @uses apply_filters() Calls 'template_directory' filter on template directory path and template name.

 *

 * @return string Template directory path.

 */

function get_template_directory() {

	$template = get_template();

	$theme_root = get_theme_root( $template );

	$template_dir = "$theme_root/$template";

	return apply_filters( 'template_directory', $template_dir, $template, $theme_root );

}

/**

 * Retrieve theme directory URI.

 *

 * @since 1.5.0

 * @uses apply_filters() Calls 'template_directory_uri' filter on template directory URI path and template name.

 *

 * @return string Template directory URI.

 */

function get_template_directory_uri() {

	$template = get_template();

	$theme_root_uri = get_theme_root_uri( $template );

	$template_dir_uri = "$theme_root_uri/$template";

	return apply_filters( 'template_directory_uri', $template_dir_uri, $template, $theme_root_uri );

}

/**

 * Retrieve theme data from parsed theme file.

 *

 * The description will have the tags filtered with the following HTML elements

 * whitelisted. The <b>'a'</b> element with the <em>href</em> and <em>title</em>

 * attributes. The <b>abbr</b> element with the <em>title</em> attribute. The

 * <b>acronym<b> element with the <em>title</em> attribute allowed. The

 * <b>code</b>, <b>em</b>, and <b>strong</b> elements also allowed.

 *

 * The style.css file must contain theme name, theme URI, and description. The

 * data can also contain author URI, author, template (parent template),

 * version, status, and finally tags. Some of these are not used by WordPress

 * administration panels, but are used by theme directory web sites which list

 * the theme.

 *

 * @since 1.5.0

 *

 * @param string $theme_file Theme file path.

 * @return array Theme data.

 */

function get_theme_data( $theme_file ) {

	$default_headers = array( 

		'Name' => 'Theme Name', 

		'URI' => 'Theme URI', 

		'Description' => 'Description', 

		'Author' => 'Author', 

		'AuthorURI' => 'Author URI',

		'Version' => 'Version', 

		'Template' => 'Template', 

		'Status' => 'Status', 

		'Tags' => 'Tags'

		);

	$themes_allowed_tags = array(

		'a' => array(

			'href' => array(),'title' => array()

			),

		'abbr' => array(

			'title' => array()

			),

		'acronym' => array(

			'title' => array()

			),

		'code' => array(),

		'em' => array(),

		'strong' => array()

	);

	$theme_data = get_file_data( $theme_file, $default_headers, 'theme' );

	$theme_data['Name'] = $theme_data['Title'] = wp_kses( $theme_data['Name'], $themes_allowed_tags );

	$theme_data['URI'] = esc_url( $theme_data['URI'] );

	$theme_data['Description'] = wptexturize( wp_kses( $theme_data['Description'], $themes_allowed_tags ) );

	$theme_data['AuthorURI'] = esc_url( $theme_data['AuthorURI'] );

	$theme_data['Template'] = wp_kses( $theme_data['Template'], $themes_allowed_tags );

	$theme_data['Version'] = wp_kses( $theme_data['Version'], $themes_allowed_tags );

	if ( $theme_data['Status'] == '' )

		$theme_data['Status'] = 'publish';

	else

		$theme_data['Status'] = wp_kses( $theme_data['Status'], $themes_allowed_tags );

	if ( $theme_data['Tags'] == '' )

		$theme_data['Tags'] = array();

	else

		$theme_data['Tags'] = array_map( 'trim', explode( ',', wp_kses( $theme_data['Tags'], array() ) ) );

	if ( $theme_data['Author'] == '' ) {

		$theme_data['Author'] = __('Anonymous');

	} else {

		if ( empty( $theme_data['AuthorURI'] ) ) {

			$theme_data['Author'] = wp_kses( $theme_data['Author'], $themes_allowed_tags );

		} else {

			$theme_data['Author'] = sprintf( '<a href="%1$s" title="%2$s">%3$s</a>', $theme_data['AuthorURI'], __( 'Visit author homepage' ), wp_kses( $theme_data['Author'], $themes_allowed_tags ) );

		}

	}

	return $theme_data;

}

/**

 * Retrieve list of themes with theme data in theme directory.

 *

 * The theme is broken, if it doesn't have a parent theme and is missing either

 * style.css and, or index.php. If the theme has a parent theme then it is

 * broken, if it is missing style.css; index.php is optional. The broken theme

 * list is saved in the {@link $wp_broken_themes} global, which is displayed on

 * the theme list in the administration panels.

 *

 * @since 1.5.0

 * @global array $wp_broken_themes Stores the broken themes.

 * @global array $wp_themes Stores the working themes.

 *

 * @return array Theme list with theme data.

 */

function get_themes() {

	global $wp_themes, $wp_broken_themes;

	if ( isset($wp_themes) )

		return $wp_themes;

	/* Register the default root as a theme directory */

	register_theme_directory( get_theme_root() );

	if ( !$theme_files = search_theme_directories() )

		return false;

	asort( $theme_files );

	$wp_themes = array();

	foreach ( (array) $theme_files as $theme_file ) {

		$theme_root = $theme_file['theme_root'];

		$theme_file = $theme_file['theme_file'];

		if ( !is_readable("$theme_root/$theme_file") ) {

			$wp_broken_themes[$theme_file] = array('Name' => $theme_file, 'Title' => $theme_file, 'Description' => __('File not readable.'));

			continue;

		}

		$theme_data = get_theme_data("$theme_root/$theme_file");

		$name        = $theme_data['Name'];

		$title       = $theme_data['Title'];

		$description = wptexturize($theme_data['Description']);

		$version     = $theme_data['Version'];

		$author      = $theme_data['Author'];

		$template    = $theme_data['Template'];

		$stylesheet  = dirname($theme_file);

		$screenshot = false;

		foreach ( array('png', 'gif', 'jpg', 'jpeg') as $ext ) {

			if (file_exists("$theme_root/$stylesheet/screenshot.$ext")) {

				$screenshot = "screenshot.$ext";

				break;

			}

		}

		if ( empty($name) ) {

			$name = dirname($theme_file);

			$title = $name;

		}

		if ( empty($template) ) {

			if ( file_exists("$theme_root/$stylesheet/index.php") )

				$template = $stylesheet;

			else

				continue;

		}

		$template = trim( $template );

		if ( !file_exists("$theme_root/$template/index.php") ) {

			$parent_dir = dirname(dirname($theme_file));

			if ( file_exists("$theme_root/$parent_dir/$template/index.php") ) {

				$template = "$parent_dir/$template";

				$template_directory = "$theme_root/$template";

			} else {

				/**

				 * The parent theme doesn't exist in the current theme's folder or sub folder

				 * so lets use the theme root for the parent template.

				 */

				if ( isset($theme_files[$template]) && file_exists( $theme_files[$template]['theme_root'] . "/$template/index.php" ) ) {

					$template_directory = $theme_files[$template]['theme_root'] . "/$template";

				} else {

					$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => __('Template is missing.'));

					continue;

				}

			}

		} else {

			$template_directory = trim( $theme_root . '/' . $template );

		}

		$stylesheet_files = array();

		$template_files = array();

		$stylesheet_dir = @ dir("$theme_root/$stylesheet");

		if ( $stylesheet_dir ) {

			while ( ($file = $stylesheet_dir->read()) !== false ) {

				if ( !preg_match('|^\.+$|', $file) ) {

					if ( preg_match('|\.css$|', $file) )

						$stylesheet_files[] = "$theme_root/$stylesheet/$file";

					elseif ( preg_match('|\.php$|', $file) )

						$template_files[] = "$theme_root/$stylesheet/$file";

				}

			}

			@ $stylesheet_dir->close();

		}

		$template_dir = @ dir("$template_directory");

		if ( $template_dir ) {

			while ( ($file = $template_dir->read()) !== false ) {

				if ( preg_match('|^\.+$|', $file) )

					continue;

				if ( preg_match('|\.php$|', $file) ) {

					$template_files[] = "$template_directory/$file";

				} elseif ( is_dir("$template_directory/$file") ) {

					$template_subdir = @ dir("$template_directory/$file");

					if ( !$template_subdir )

						continue;

					while ( ($subfile = $template_subdir->read()) !== false ) {

						if ( preg_match('|^\.+$|', $subfile) )

							continue;

						if ( preg_match('|\.php$|', $subfile) )

							$template_files[] = "$template_directory/$file/$subfile";

					}

					@ $template_subdir->close();

				}

			}

			@ $template_dir->close();

		}

		//Make unique and remove duplicates when stylesheet and template are the same i.e. most themes

		$template_files = array_unique($template_files);

		$stylesheet_files = array_unique($stylesheet_files);

		$template_dir = dirname($template_files[0]);

		$stylesheet_dir = dirname($stylesheet_files[0]);

		if ( empty($template_dir) )

			$template_dir = '/';

		if ( empty($stylesheet_dir) )

			$stylesheet_dir = '/';

		// Check for theme name collision.  This occurs if a theme is copied to

		// a new theme directory and the theme header is not updated.  Whichever

		// theme is first keeps the name.  Subsequent themes get a suffix applied.

		// The Default and Classic themes always trump their pretenders.

		if ( isset($wp_themes[$name]) ) {

			if ( ('WordPress Default' == $name || 'WordPress Classic' == $name) &&

					 ('default' == $stylesheet || 'classic' == $stylesheet) ) {

				// If another theme has claimed to be one of our default themes, move

				// them aside.

				$suffix = $wp_themes[$name]['Stylesheet'];

				$new_name = "$name/$suffix";

				$wp_themes[$new_name] = $wp_themes[$name];

				$wp_themes[$new_name]['Name'] = $new_name;

			} else {

				$name = "$name/$stylesheet";

			}

		}

		$theme_roots[$stylesheet] = str_replace( WP_CONTENT_DIR, '', $theme_root );

		$wp_themes[$name] = array( 'Name' => $name, 'Title' => $title, 'Description' => $description, 'Author' => $author, 'Version' => $version, 'Template' => $template, 'Stylesheet' => $stylesheet, 'Template Files' => $template_files, 'Stylesheet Files' => $stylesheet_files, 'Template Dir' => $template_dir, 'Stylesheet Dir' => $stylesheet_dir, 'Status' => $theme_data['Status'], 'Screenshot' => $screenshot, 'Tags' => $theme_data['Tags'], 'Theme Root' => $theme_root, 'Theme Root URI' => str_replace( WP_CONTENT_DIR, content_url(), $theme_root ) );

	}

	unset($theme_files);

	/* Store theme roots in the DB */

	if ( get_site_transient( 'theme_roots' ) != $theme_roots )

		set_site_transient( 'theme_roots', $theme_roots, 7200 ); // cache for two hours

	unset($theme_roots);

	/* Resolve theme dependencies. */

	$theme_names = array_keys( $wp_themes );

	foreach ( (array) $theme_names as $theme_name ) {

		$wp_themes[$theme_name]['Parent Theme'] = '';

		if ( $wp_themes[$theme_name]['Stylesheet'] != $wp_themes[$theme_name]['Template'] ) {

			foreach ( (array) $theme_names as $parent_theme_name ) {