Introduce recommended section in theme backend

Meant to highlight modern themes for guiding users not to pick the outdated xhtml themes still available via spartacus. See http://board.s9y.org/viewtopic.php?f=5&t=20713

include/admin/templates.inc.php

@@ -175,13 +175,13 @@ $stack = array();
 serendipity_plugin_api::hook_event('backend_templates_fetchlist', $stack);
 $themes = serendipity_fetchTemplates();
 $data['templates'] = array();
+$data['recommended_templates'] = array();
 
 foreach($themes AS $theme) {
     $stack[$theme] = serendipity_fetchTemplateInfo($theme);
 }
 ksort($stack);
 
-
 foreach ($stack as $theme => $info) {
     /* Sorry, but we don't display engines */
     if ( strtolower($info['engine']) == 'yes') {
@@ -222,12 +222,20 @@ foreach ($stack as $theme => $info) {
         $unmetRequirements[] = 'Serendipity '. $info['require serendipity'];
         $data['templates'][$theme]['unmetRequirements'] = sprintf(UNMET_REQUIREMENTS, implode(', ', $unmetRequirements));
     }
+
+    if ($info['recommended']) {
+        $data['recommended_templates'][$theme] = $data['templates'][$theme];
+        if ($serendipity['template'] != $theme) {
+            unset($data['templates'][$theme]);
+        }
+    }
 }
 
 $data['cur_tpl']         = $data['templates'][$data['cur_template']];
 $data['cur_tpl_backend'] = $data['templates'][$data['cur_template_backend']];
 
 unset($data['templates'][$data['cur_template']]);
+unset($data['recommended_templates'][$data['cur_template']]);
 
 echo serendipity_smarty_show('admin/templates.inc.tpl', $data);
 

templates/2k11/admin/templates.inc.tpl

@@ -91,10 +91,7 @@
             </article>
         {/if}
 
-        <h2>{$CONST.AVAILABLE_TEMPLATES}</h2>
-
-        <ul class="plainList clearfix">
-        {foreach $templates as $template=>$info}
+        {function name=templateBlock}
             <li><article class="clearfix">
                     <h3 title="{$info.info.name}">{$info.info.name|truncate:25:"&hellip;"}</h3>
                     <div class="clearfix equal_heights template_wrap">
@@ -140,6 +137,21 @@
                 {/if}
                 </article>
             </li>
+        {/function}
+
+        <h2>{$CONST.RECOMMENDED}</h2>
+        <ul class="plainList clearfix">
+        {foreach $recommended_templates as $template=>$info}
+            {templateBlock template=$template info=$info}
+        {/foreach}
+        </ul>
+        
+
+        <h2>{$CONST.AVAILABLE_TEMPLATES}</h2>
+
+        <ul class="plainList clearfix">
+        {foreach $templates as $template=>$info}
+            {templateBlock template=$template info=$info}
         {/foreach}
         </ul>
     </section>

templates/2k11/info.txt

@@ -3,3 +3,4 @@ Author: Matthias Mees, Veit Lehmann
 Date: 2015-05-19
 Require Serendipity: 2.0
 Backend: Yes
+Recommended: Yes

templates/clean-blog/info.txt

@@ -2,4 +2,5 @@ Name: Clean Blog
 Author: s9y theme by Don Chambers.  Original bootstrap theme by Iron Summit Media Strategies, LLC.
 Date: 2016-02-02
 Require Serendipity: 2.0
-Backend: No
+Backend: No
+Recommended: Yes

templates/next/info.txt

@@ -2,3 +2,4 @@ Name: Next
 Author: Matthias Mees, mm@yellowled.de
 Date: 2015-05-07
 Require Serendipity: 2.0
+Recommended: Yes