we have working save and revert buttons

lib/plugins/styler/action.php

@@ -19,8 +19,8 @@ class action_plugin_styler extends DokuWiki_Action_Plugin {
      */
     public function register(Doku_Event_Handler $controller) {
 
-       $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handle_ajax');
-       $controller->register_hook('ACTION_ACT_PREPROCESS', 'BEFORE', $this, 'handle_action');
+        $controller->register_hook('AJAX_CALL_UNKNOWN', 'BEFORE', $this, 'handle_ajax');
+        $controller->register_hook('ACTION_ACT_PREPROCESS', 'BEFORE', $this, 'handle_action');
 
     }
 
@@ -35,31 +35,90 @@ class action_plugin_styler extends DokuWiki_Action_Plugin {
     public function handle_action(Doku_Event &$event, $param) {
         $event->data = act_clean($event->data);
         if($event->data === 'styler_plugin_preview') {
-            msg('handle') ;
             $event->data = 'show';
             $this->preview();
-        } elseif ($event->data === 'styler_plugin_save') {
+        } elseif($event->data === 'styler_plugin_reset') {
             $event->data = 'show';
+            $this->reset();
+        } elseif($event->data === 'styler_plugin_revert') {
+            $event->data = 'show';
+            $this->revert();
+        } elseif($event->data === 'styler_plugin_save') {
+            $event->data = 'show';
+            $this->save();
         }
     }
 
-    protected function preview(){
+    /**
+     * saves the preview.ini
+     */
+    protected function preview() {
         global $conf;
-        $ini     = $conf['cachedir'].'/preview.ini';
+        $ini = $conf['cachedir'].'/preview.ini';
         io_saveFile($ini, $this->makeini());
     }
 
+    /**
+     * deletes the preview.ini
+     */
+    protected function reset() {
+        global $conf;
+        $ini = $conf['cachedir'].'/preview.ini';
+        io_saveFile($ini, '');
+    }
+
+    /**
+     * deletes the local style.ini replacements
+     */
+    protected function revert() {
+        $this->replaceini('');
+        $this->reset();
+    }
+
+    /**
+     * save the local style.ini replacements
+     */
+    protected function save() {
+        $this->replaceini($this->makeini());
+        $this->reset();
+    }
+
+    /**
+     * create the replacement part of a style.ini from submitted data
+     *
+     * @return string
+     */
     protected function makeini() {
         global $INPUT;
 
         $ini = "[replacements]\n";
         foreach($INPUT->arr('tpl') as $key => $val) {
-            $ini .= $key .' = "'.addslashes($val).'"'."\n";
+            $ini .= $key.' = "'.addslashes($val).'"'."\n";
         }
 
         return $ini;
     }
 
+    /**
+     * replaces the replacement parts in the local ini
+     *
+     * @param string $new the new ini contents
+     */
+    protected function replaceini($new) {
+        global $conf;
+        $ini = DOKU_CONF."tpl/".$conf['template']."/style.ini";
+        if(file_exists($ini)) {
+            $old = io_readFile($ini);
+            $old = preg_replace('/\[replacements\]\n.*?(\n\[.*]|$)/s', '\\1', $old);
+            $old = trim($old);
+        } else {
+            $old = '';
+        }
+
+        io_makeFileDir($ini);
+        io_saveFile($ini, "$old\n\n$new");
+    }
+
     /**
      * [Custom event handler which performs action]
      *

lib/plugins/styler/admin.php

@@ -61,6 +61,9 @@ class admin_plugin_styler extends DokuWiki_Admin_Plugin {
             }
             echo '</table>';
             echo '<input type="submit" name="do[styler_plugin_preview]" value="preview">';
+            echo '<input type="submit" name="do[styler_plugin_reset]" value="reset current">'; #FIXME only if preview.ini exists
+            echo '<input type="submit" name="do[styler_plugin_revert]" value="revert to original">'; #FIXME only if local.ini exists
+            echo '<input type="submit" name="do[styler_plugin_save]" value="save">';
             echo '</form>';
         }