+/**
+ * Remove a theme
+ *
+ * @since 2.8.0
+ *
+ * @global WP_Filesystem_Base $wp_filesystem Subclass
+ *
+ * @param string $stylesheet Stylesheet of the theme to delete
+ * @param string $redirect Redirect to page when complete.
+ * @return void|bool|WP_Error When void, echoes content.
+ */
+function delete_theme($stylesheet, $redirect = '') {
+ global $wp_filesystem;
+
+ if ( empty($stylesheet) )
+ return false;
+
+ ob_start();
+ if ( empty( $redirect ) )
+ $redirect = wp_nonce_url('themes.php?action=delete&stylesheet=' . urlencode( $stylesheet ), 'delete-theme_' . $stylesheet);
+ if ( false === ($credentials = request_filesystem_credentials($redirect)) ) {
+ $data = ob_get_clean();
+
+ if ( ! empty($data) ){
+ include_once( ABSPATH . 'wp-admin/admin-header.php');
+ echo $data;
+ include( ABSPATH . 'wp-admin/admin-footer.php');
+ exit;
+ }
+ return;
+ }
+
+ if ( ! WP_Filesystem($credentials) ) {
+ request_filesystem_credentials($redirect, '', true); // Failed to connect, Error and request again
+ $data = ob_get_clean();
+
+ if ( ! empty($data) ) {
+ include_once( ABSPATH . 'wp-admin/admin-header.php');
+ echo $data;
+ include( ABSPATH . 'wp-admin/admin-footer.php');
+ exit;
+ }
+ return;
+ }
+
+ if ( ! is_object($wp_filesystem) )
+ return new WP_Error('fs_unavailable', __('Could not access filesystem.'));
+
+ if ( is_wp_error($wp_filesystem->errors) && $wp_filesystem->errors->get_error_code() )
+ return new WP_Error('fs_error', __('Filesystem error.'), $wp_filesystem->errors);
+
+ // Get the base plugin folder.
+ $themes_dir = $wp_filesystem->wp_themes_dir();
+ if ( empty( $themes_dir ) ) {
+ return new WP_Error( 'fs_no_themes_dir', __( 'Unable to locate WordPress theme directory.' ) );
+ }
+
+ $themes_dir = trailingslashit( $themes_dir );
+ $theme_dir = trailingslashit( $themes_dir . $stylesheet );
+ $deleted = $wp_filesystem->delete( $theme_dir, true );
+
+ if ( ! $deleted ) {
+ return new WP_Error( 'could_not_remove_theme', sprintf( __( 'Could not fully remove the theme %s.' ), $stylesheet ) );
+ }
+
+ $theme_translations = wp_get_installed_translations( 'themes' );
+
+ // Remove language files, silently.
+ if ( ! empty( $theme_translations[ $stylesheet ] ) ) {
+ $translations = $theme_translations[ $stylesheet ];
+
+ foreach ( $translations as $translation => $data ) {
+ $wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.po' );
+ $wp_filesystem->delete( WP_LANG_DIR . '/themes/' . $stylesheet . '-' . $translation . '.mo' );
+ }
+ }
+
+ // Force refresh of theme update information.
+ delete_site_transient( 'update_themes' );
+
+ return true;
+}
+
+/**
+ * Get the Page Templates available in this theme
+ *
+ * @since 1.5.0
+ *
+ * @param WP_Post|null $post Optional. The post being edited, provided for context.
+ * @return array Key is the template name, value is the filename of the template
+ */
+function get_page_templates( $post = null ) {
+ return array_flip( wp_get_theme()->get_page_templates( $post ) );
+}
+
+/**
+ * Tidies a filename for url display by the theme editor.
+ *
+ * @since 2.9.0
+ * @access private
+ *
+ * @param string $fullpath Full path to the theme file
+ * @param string $containingfolder Path of the theme parent folder
+ * @return string
+ */
+function _get_template_edit_filename($fullpath, $containingfolder) {
+ return str_replace(dirname(dirname( $containingfolder )) , '', $fullpath);
+}
+
+/**
+ * Check if there is an update for a theme available.
+ *
+ * Will display link, if there is an update available.
+ *
+ * @since 2.7.0
+ * @see get_theme_update_available()
+ *
+ * @param WP_Theme $theme Theme data object.
+ */
+function theme_update_available( $theme ) {
+ echo get_theme_update_available( $theme );
+}
+
+/**
+ * Retrieve the update link if there is a theme update available.
+ *
+ * Will return a link if there is an update available.
+ *
+ * @since 3.8.0
+ *
+ * @staticvar object $themes_update
+ *
+ * @param WP_Theme $theme WP_Theme object.
+ * @return false|string HTML for the update link, or false if invalid info was passed.
+ */
+function get_theme_update_available( $theme ) {
+ static $themes_update = null;
+
+ if ( !current_user_can('update_themes' ) )
+ return false;
+
+ if ( !isset($themes_update) )
+ $themes_update = get_site_transient('update_themes');
+
+ if ( ! ( $theme instanceof WP_Theme ) ) {
+ return false;
+ }
+
+ $stylesheet = $theme->get_stylesheet();
+
+ $html = '';
+
+ if ( isset($themes_update->response[ $stylesheet ]) ) {
+ $update = $themes_update->response[ $stylesheet ];
+ $theme_name = $theme->display('Name');
+ $details_url = add_query_arg(array('TB_iframe' => 'true', 'width' => 1024, 'height' => 800), $update['url']); //Theme browser inside WP? replace this, Also, theme preview JS will override this on the available list.
+ $update_url = wp_nonce_url( admin_url( 'update.php?action=upgrade-theme&theme=' . urlencode( $stylesheet ) ), 'upgrade-theme_' . $stylesheet );
+ $update_onclick = 'onclick="if ( confirm(\'' . esc_js( __("Updating this theme will lose any customizations you have made. 'Cancel' to stop, 'OK' to update.") ) . '\') ) {return true;}return false;"';
+
+ if ( !is_multisite() ) {
+ if ( ! current_user_can('update_themes') ) {
+ $html = sprintf( '<p><strong>' . __( 'There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%3$s">View version %4$s details</a>.' ) . '</strong></p>',
+ $theme_name, esc_url( $details_url ), esc_attr( $theme['Name'] ), $update['new_version'] );
+ } elseif ( empty( $update['package'] ) ) {
+ $html = sprintf( '<p><strong>' . __( 'There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%3$s">View version %4$s details</a>. <em>Automatic update is unavailable for this theme.</em>' ) . '</strong></p>',
+ $theme_name, esc_url( $details_url ), esc_attr( $theme['Name'] ), $update['new_version'] );
+ } else {
+ $html = sprintf( '<p><strong>' . __( 'There is a new version of %1$s available. <a href="%2$s" class="thickbox" title="%3$s">View version %4$s details</a> or <a href="%5$s">update now</a>.' ) . '</strong></p>',
+ $theme_name, esc_url( $details_url ), esc_attr( $theme['Name'] ), $update['new_version'], $update_url, $update_onclick );
+ }
+ }
+ }
+
+ return $html;
+}
+
+/**
+ * Retrieve list of WordPress theme features (aka theme tags)
+ *
+ * @since 3.1.0
+ *
+ * @param bool $api Optional. Whether try to fetch tags from the WP.org API. Defaults to true.
+ * @return array Array of features keyed by category with translations keyed by slug.
+ */
+function get_theme_feature_list( $api = true ) {
+ // Hard-coded list is used if api not accessible.
+ $features = array(
+ __( 'Colors' ) => array(
+ 'black' => __( 'Black' ),
+ 'blue' => __( 'Blue' ),
+ 'brown' => __( 'Brown' ),
+ 'gray' => __( 'Gray' ),
+ 'green' => __( 'Green' ),
+ 'orange' => __( 'Orange' ),
+ 'pink' => __( 'Pink' ),
+ 'purple' => __( 'Purple' ),
+ 'red' => __( 'Red' ),
+ 'silver' => __( 'Silver' ),
+ 'tan' => __( 'Tan' ),
+ 'white' => __( 'White' ),
+ 'yellow' => __( 'Yellow' ),
+ 'dark' => __( 'Dark' ),
+ 'light' => __( 'Light' ),
+ ),
+
+ __( 'Layout' ) => array(
+ 'fixed-layout' => __( 'Fixed Layout' ),
+ 'fluid-layout' => __( 'Fluid Layout' ),
+ 'responsive-layout' => __( 'Responsive Layout' ),
+ 'one-column' => __( 'One Column' ),
+ 'two-columns' => __( 'Two Columns' ),
+ 'three-columns' => __( 'Three Columns' ),
+ 'four-columns' => __( 'Four Columns' ),
+ 'left-sidebar' => __( 'Left Sidebar' ),
+ 'right-sidebar' => __( 'Right Sidebar' ),
+ ),
+
+ __( 'Features' ) => array(
+ 'accessibility-ready' => __( 'Accessibility Ready' ),
+ 'blavatar' => __( 'Blavatar' ),
+ 'buddypress' => __( 'BuddyPress' ),
+ 'custom-background' => __( 'Custom Background' ),
+ 'custom-colors' => __( 'Custom Colors' ),
+ 'custom-header' => __( 'Custom Header' ),
+ 'custom-menu' => __( 'Custom Menu' ),
+ 'editor-style' => __( 'Editor Style' ),
+ 'featured-image-header' => __( 'Featured Image Header' ),
+ 'featured-images' => __( 'Featured Images' ),
+ 'flexible-header' => __( 'Flexible Header' ),
+ 'front-page-post-form' => __( 'Front Page Posting' ),
+ 'full-width-template' => __( 'Full Width Template' ),
+ 'microformats' => __( 'Microformats' ),
+ 'post-formats' => __( 'Post Formats' ),
+ 'rtl-language-support' => __( 'RTL Language Support' ),
+ 'sticky-post' => __( 'Sticky Post' ),
+ 'theme-options' => __( 'Theme Options' ),
+ 'threaded-comments' => __( 'Threaded Comments' ),
+ 'translation-ready' => __( 'Translation Ready' ),
+ ),
+
+ __( 'Subject' ) => array(
+ 'holiday' => __( 'Holiday' ),
+ 'photoblogging' => __( 'Photoblogging' ),
+ 'seasonal' => __( 'Seasonal' ),
+ )
+ );
+
+ if ( ! $api || ! current_user_can( 'install_themes' ) )
+ return $features;
+
+ if ( !$feature_list = get_site_transient( 'wporg_theme_feature_list' ) )
+ set_site_transient( 'wporg_theme_feature_list', array(), 3 * HOUR_IN_SECONDS );
+
+ if ( !$feature_list ) {
+ $feature_list = themes_api( 'feature_list', array() );
+ if ( is_wp_error( $feature_list ) )
+ return $features;
+ }
+
+ if ( !$feature_list )
+ return $features;
+
+ set_site_transient( 'wporg_theme_feature_list', $feature_list, 3 * HOUR_IN_SECONDS );
+
+ $category_translations = array(
+ 'Colors' => __( 'Colors' ),
+ 'Layout' => __( 'Layout' ),
+ 'Features' => __( 'Features' ),
+ 'Subject' => __( 'Subject' )
+ );
+
+ // Loop over the wporg canonical list and apply translations
+ $wporg_features = array();
+ foreach ( (array) $feature_list as $feature_category => $feature_items ) {
+ if ( isset($category_translations[$feature_category]) )
+ $feature_category = $category_translations[$feature_category];
+ $wporg_features[$feature_category] = array();
+
+ foreach ( $feature_items as $feature ) {
+ if ( isset($features[$feature_category][$feature]) )
+ $wporg_features[$feature_category][$feature] = $features[$feature_category][$feature];
+ else
+ $wporg_features[$feature_category][$feature] = $feature;
+ }
+ }
+
+ return $wporg_features;
+}
+
+/**
+ * Retrieve theme installer pages from WordPress Themes API.
+ *
+ * It is possible for a theme to override the Themes API result with three
+ * filters. Assume this is for themes, which can extend on the Theme Info to
+ * offer more choices. This is very powerful and must be used with care, when
+ * overriding the filters.
+ *
+ * The first filter, 'themes_api_args', is for the args and gives the action as
+ * the second parameter. The hook for 'themes_api_args' must ensure that an
+ * object is returned.
+ *
+ * The second filter, 'themes_api', is the result that would be returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $action The requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param array|object $args Optional. Arguments to serialize for the Theme Info API.
+ * @return mixed
+ */
+function themes_api( $action, $args = null ) {
+
+ if ( is_array( $args ) ) {
+ $args = (object) $args;
+ }
+
+ if ( ! isset( $args->per_page ) ) {
+ $args->per_page = 24;
+ }
+
+ if ( ! isset( $args->locale ) ) {
+ $args->locale = get_locale();
+ }
+
+ /**
+ * Filter arguments used to query for installer pages from the WordPress.org Themes API.
+ *
+ * Important: An object MUST be returned to this filter.
+ *
+ * @since 2.8.0
+ *
+ * @param object $args Arguments used to query for installer pages from the WordPress.org Themes API.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ */
+ $args = apply_filters( 'themes_api_args', $args, $action );
+
+ /**
+ * Filter whether to override the WordPress.org Themes API.
+ *
+ * Returning a value of true to this filter allows a theme to completely
+ * override the built-in WordPress.org API.
+ *
+ * @since 2.8.0
+ *
+ * @param bool $bool Whether to override the WordPress.org Themes API. Default false.
+ * @param string $action Requested action. Likely values are 'theme_information',
+ * 'feature_list', or 'query_themes'.
+ * @param object $args Arguments used to query for installer pages from the Themes API.
+ */
+ $res = apply_filters( 'themes_api', false, $action, $args );
+
+ if ( ! $res ) {
+ $url = $http_url = 'http://api.wordpress.org/themes/info/1.0/';
+ if ( $ssl = wp_http_supports( array( 'ssl' ) ) )
+ $url = set_url_scheme( $url, 'https' );
+
+ $http_args = array(
+ 'body' => array(
+ 'action' => $action,
+ 'request' => serialize( $args )
+ )
+ );
+ $request = wp_remote_post( $url, $http_args );
+
+ if ( $ssl && is_wp_error( $request ) ) {
+ if ( ! defined( 'DOING_AJAX' ) || ! DOING_AJAX ) {
+ trigger_error( __( 'An unexpected error occurred. Something may be wrong with WordPress.org or this server’s configuration. If you continue to have problems, please try the <a href="https://wordpress.org/support/">support forums</a>.' ) . ' ' . __( '(WordPress could not establish a secure connection to WordPress.org. Please contact your server administrator.)' ), headers_sent() || WP_DEBUG ? E_USER_WARNING : E_USER_NOTICE );