+/**
+ * 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 );
+ }
+ $request = wp_remote_post( $http_url, $http_args );
+ }
+
+ if ( is_wp_error($request) ) {
+ $res = new WP_Error('themes_api_failed', __( '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>.' ), $request->get_error_message() );
+ } else {
+ $res = maybe_unserialize( wp_remote_retrieve_body( $request ) );
+ if ( ! is_object( $res ) && ! is_array( $res ) )
+ $res = new WP_Error('themes_api_failed', __( '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>.' ), wp_remote_retrieve_body( $request ) );
+ }
+ }
+
+ /**
+ * Filter the returned WordPress.org Themes API response.
+ *
+ * @since 2.8.0
+ *
+ * @param array|object $res WordPress.org Themes API response.
+ * @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 WordPress.org Themes API.
+ */
+ return apply_filters( 'themes_api_result', $res, $action, $args );
+}
+
+/**
+ * Prepare themes for JavaScript.
+ *
+ * @since 3.8.0
+ *
+ * @param array $themes Optional. Array of WP_Theme objects to prepare.
+ * Defaults to all allowed themes.
+ *
+ * @return array An associative array of theme data, sorted by name.
+ */
+function wp_prepare_themes_for_js( $themes = null ) {
+ $current_theme = get_stylesheet();
+
+ /**
+ * Filter theme data before it is prepared for JavaScript.
+ *
+ * Passing a non-empty array will result in wp_prepare_themes_for_js() returning
+ * early with that value instead.
+ *
+ * @since 4.2.0
+ *
+ * @param array $prepared_themes An associative array of theme data. Default empty array.
+ * @param null|array $themes An array of WP_Theme objects to prepare, if any.
+ * @param string $current_theme The current theme slug.
+ */
+ $prepared_themes = (array) apply_filters( 'pre_prepare_themes_for_js', array(), $themes, $current_theme );
+
+ if ( ! empty( $prepared_themes ) ) {
+ return $prepared_themes;
+ }
+
+ // Make sure the current theme is listed first.
+ $prepared_themes[ $current_theme ] = array();
+
+ if ( null === $themes ) {
+ $themes = wp_get_themes( array( 'allowed' => true ) );
+ if ( ! isset( $themes[ $current_theme ] ) ) {
+ $themes[ $current_theme ] = wp_get_theme();
+ }
+ }
+
+ $updates = array();
+ if ( current_user_can( 'update_themes' ) ) {
+ $updates_transient = get_site_transient( 'update_themes' );
+ if ( isset( $updates_transient->response ) ) {
+ $updates = $updates_transient->response;
+ }
+ }
+
+ WP_Theme::sort_by_name( $themes );
+
+ $parents = array();
+
+ foreach ( $themes as $theme ) {
+ $slug = $theme->get_stylesheet();
+ $encoded_slug = urlencode( $slug );
+
+ $parent = false;
+ if ( $theme->parent() ) {
+ $parent = $theme->parent()->display( 'Name' );
+ $parents[ $slug ] = $theme->parent()->get_stylesheet();
+ }
+
+ $prepared_themes[ $slug ] = array(
+ 'id' => $slug,
+ 'name' => $theme->display( 'Name' ),
+ 'screenshot' => array( $theme->get_screenshot() ), // @todo multiple
+ 'description' => $theme->display( 'Description' ),
+ 'author' => $theme->display( 'Author', false, true ),
+ 'authorAndUri' => $theme->display( 'Author' ),
+ 'version' => $theme->display( 'Version' ),
+ 'tags' => $theme->display( 'Tags' ),
+ 'parent' => $parent,
+ 'active' => $slug === $current_theme,
+ 'hasUpdate' => isset( $updates[ $slug ] ),
+ 'update' => get_theme_update_available( $theme ),
+ 'actions' => array(
+ 'activate' => current_user_can( 'switch_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=activate&stylesheet=' . $encoded_slug ), 'switch-theme_' . $slug ) : null,
+ 'customize' => ( current_user_can( 'edit_theme_options' ) && current_user_can( 'customize' ) ) ? wp_customize_url( $slug ) : null,
+ 'delete' => current_user_can( 'delete_themes' ) ? wp_nonce_url( admin_url( 'themes.php?action=delete&stylesheet=' . $encoded_slug ), 'delete-theme_' . $slug ) : null,
+ ),
+ );
+ }
+
+ // Remove 'delete' action if theme has an active child
+ if ( ! empty( $parents ) && array_key_exists( $current_theme, $parents ) ) {
+ unset( $prepared_themes[ $parents[ $current_theme ] ]['actions']['delete'] );
+ }
+
+ /**
+ * Filter the themes prepared for JavaScript, for themes.php.
+ *
+ * Could be useful for changing the order, which is by name by default.
+ *
+ * @since 3.8.0
+ *
+ * @param array $prepared_themes Array of themes.
+ */
+ $prepared_themes = apply_filters( 'wp_prepare_themes_for_js', $prepared_themes );
+ $prepared_themes = array_values( $prepared_themes );
+ return array_filter( $prepared_themes );
+}
+
+/**
+ * Print JS templates for the theme-browsing UI in the Customizer.
+ *
+ * @since 4.2.0
+ */
+function customize_themes_print_templates() {
+ $preview_url = esc_url( add_query_arg( 'theme', '__THEME__' ) ); // Token because esc_url() strips curly braces.
+ $preview_url = str_replace( '__THEME__', '{{ data.id }}', $preview_url );
+ ?>
+ <script type="text/html" id="tmpl-customize-themes-details-view">
+ <div class="theme-backdrop"></div>
+ <div class="theme-wrap">
+ <div class="theme-header">
+ <button type="button" class="left dashicons dashicons-no"><span class="screen-reader-text"><?php _e( 'Show previous theme' ); ?></span></button>
+ <button type="button" class="right dashicons dashicons-no"><span class="screen-reader-text"><?php _e( 'Show next theme' ); ?></span></button>
+ <button type="button" class="close dashicons dashicons-no"><span class="screen-reader-text"><?php _e( 'Close details dialog' ); ?></span></button>
+ </div>
+ <div class="theme-about">
+ <div class="theme-screenshots">
+ <# if ( data.screenshot[0] ) { #>
+ <div class="screenshot"><img src="{{ data.screenshot[0] }}" alt="" /></div>
+ <# } else { #>
+ <div class="screenshot blank"></div>
+ <# } #>
+ </div>
+
+ <div class="theme-info">
+ <# if ( data.active ) { #>
+ <span class="current-label"><?php _e( 'Current Theme' ); ?></span>
+ <# } #>
+ <h3 class="theme-name">{{{ data.name }}}<span class="theme-version"><?php printf( __( 'Version: %s' ), '{{ data.version }}' ); ?></span></h3>
+ <h4 class="theme-author"><?php printf( __( 'By %s' ), '{{{ data.authorAndUri }}}' ); ?></h4>
+ <p class="theme-description">{{{ data.description }}}</p>
+
+ <# if ( data.parent ) { #>
+ <p class="parent-theme"><?php printf( __( 'This is a child theme of %s.' ), '<strong>{{{ data.parent }}}</strong>' ); ?></p>
+ <# } #>
+
+ <# if ( data.tags ) { #>
+ <p class="theme-tags"><span><?php _e( 'Tags:' ); ?></span> {{ data.tags }}</p>
+ <# } #>
+ </div>
+ </div>
+
+ <# if ( ! data.active ) { #>
+ <div class="theme-actions">
+ <div class="inactive-theme">
+ <a href="<?php echo $preview_url; ?>" target="_top" class="button button-primary"><?php _e( 'Live Preview' ); ?></a>
+ </div>
+ </div>
+ <# } #>
+ </div>
+ </script>
+ <?php
+}