Use labels for user attributes

Makes use of the cascading localization mechanism. The most common attributes are defined in lang files.

lang/de/lang.php

@@ -0,0 +1,6 @@
+<?php
+
+$lang['user'] = 'Benutzer';
+$lang['name'] = 'Name';
+$lang['email'] = 'E-Mail';
+$lang['mail'] = 'E-Mail';

lang/en/lang.php

@@ -0,0 +1,6 @@
+<?php
+
+$lang['user'] = 'User';
+$lang['name'] = 'Name';
+$lang['email'] = 'Email';
+$lang['mail'] = 'Email';

syntax/table.php

@@ -80,15 +80,19 @@ public function handle($match, $state, $pos, Doku_Handler $handler)
         }
 
         $data['attributes'] = $this->trimexplode(',', $cfg['attributes']);
+
+        // localize attribute names in table header
+        $data['attributeHeaders'] = array_map(function ($attr) {
+            return $this->getLang($attr) ?: $attr;
+        }, $data['attributes']);
+
         $data['groups'] = $this->trimexplode(',', $cfg['groups']);
         $titles = $this->trimexplode(',', $cfg['titles']);
         if(empty($data['attributes'])) $data['attributes'] = ['user'];
 
 
         $groupHeaders = $titles ? array_replace($data['groups'], $titles) : $data['groups'];
-        $data['headers'] = array_merge($data['attributes'], $groupHeaders);
-
-
+        $data['headers'] = array_merge($data['attributeHeaders'], $groupHeaders);
 
         return $data;
     }