List broken themes and suggest corrective action.

git-svn-id: https://develop.svn.wordpress.org/trunk@1829 602fd350-edb4-49c9-b593-d223f7449a82

wp-admin/admin-functions.php

@@ -572,6 +572,13 @@ function validate_current_theme() {
 	return true;
 }
 
+function get_broken_themes() {
+	global $wp_broken_themes;
+
+	get_themes();
+	return $wp_broken_themes;
+}
+
 function get_page_templates() {
 	$themes = get_themes();
 	$theme = get_current_theme();

wp-admin/themes.php

@@ -99,6 +99,44 @@ $current_stylesheet = $themes[$current_theme]['Stylesheet'];
 <?php
 }
 ?>
+
+<?php
+// List broken themes, if any.
+$broken_themes = get_broken_themes();
+if (count($broken_themes)) {
+?>
+
+<h2><?php _e('Broken Themes'); ?></h2>
+<p><?php _e('The following themes are installed but incomplete.  Themes must have a stylesheet and a template.'); ?></p>
+
+<table width="100%" cellpadding="3" cellspacing="3">
+	<tr>
+		<th><?php _e('Name'); ?></th>
+		<th><?php _e('Description'); ?></th>
+	</tr>
+<?php
+	$theme = '';
+	
+	$theme_names = array_keys($broken_themes);
+	natcasesort($theme_names);
+
+	foreach ($theme_names as $theme_name) {
+		$title = $broken_themes[$theme_name]['Title'];
+		$description = $broken_themes[$theme_name]['Description'];
+
+		$theme = ('class="alternate"' == $theme) ? '' : 'class="alternate"';
+		echo "
+	  <tr $theme>
+	     <td>$title</td>
+	     <td>$description</td>
+	  </tr>";
+	}
+?>
+</table>
+<?php
+}
+?>
+
 </div>
 
 <?php

wp-includes/functions.php

@@ -1993,12 +1993,14 @@ function get_theme_data($theme_file) {
 
 function get_themes() {
 	global $wp_themes;
+	global $wp_broken_themes;
 
 	if (isset($wp_themes)) {
 		return $wp_themes;
 	}
 
 	$themes = array();
+	$wp_broken_themes = array();
 	$theme_loc = 'wp-content/themes';
 	$theme_root = ABSPATH . $theme_loc;
 
@@ -2007,12 +2009,21 @@ function get_themes() {
 	if ($themes_dir) {
 		while(($theme_dir = $themes_dir->read()) !== false) {
 			if (is_dir($theme_root . '/' . $theme_dir)) {
+				if ($theme_dir == '.' || $theme_dir == '..') {
+					continue;
+				}
 				$stylish_dir = @ dir($theme_root . '/' . $theme_dir);
+				$found_stylesheet = false;
 				while(($theme_file = $stylish_dir->read()) !== false) {
 					if ( $theme_file == 'style.css' ) {
 						$theme_files[] = $theme_dir . '/' . $theme_file;
+						$found_stylesheet = true;
+						break;
 					}
 				}
+				if (!$found_stylesheet) {
+					$wp_broken_themes[$theme_dir] = array('Name' => $theme_dir, 'Title' => $theme_dir, 'Description' => __('Stylesheet is missing.'));
+				}
 			}
 		}
 	}
@@ -2062,6 +2073,11 @@ function get_themes() {
 		$template = $theme_data['Template'];
 		$stylesheet = dirname($theme_file);
 
+		if (empty($name)) {
+			$name = dirname($theme_file);
+			$title = $name;
+		}
+
 		if (empty($template)) {
 			if (file_exists(dirname("$theme_root/$theme_file/index.php"))) {
 				$template = dirname($theme_file);
@@ -2073,14 +2089,10 @@ function get_themes() {
 		$template = trim($template);
 
 		if (($template != 'default') && (! file_exists("$theme_root/$template/index.php"))) {
+			$wp_broken_themes[$name] = array('Name' => $name, 'Title' => $title, 'Description' => __('Template is missing.'));
 			continue;
 		}
 		
-		if (empty($name)) {
-			$name = dirname($theme_file);
-			$title = $name;
-		}
-		
 		$stylesheet_files = array();
 		if ($stylesheet != 'default') {
 			$stylesheet_dir = @ dir("$theme_root/$stylesheet");