Prefer "complete[name]" field for mapping with tier item; see plugins…

…GLPI#121

inc/commoninjectionlib.class.php

@@ -2008,7 +2008,36 @@ static function addToSearchOptions(array $type_searchOptions, array $options,
          }
       }
 
-         return $type_searchOptions;
+      /*
+       * Preserve only one option per linkfield, as mapping process is based on arrays indexed by linkfield.
+       * This is a hack to handle behaviour explained in issue https://github.com/pluginsGLPI/datainjection/issues/121.
+       *
+       * Preserved option is "complename" if existing, or "name" if existing,
+       * or first founded option for each linkfield.
+       */
+      $linkfield_preserved_option = array_fill_keys(array_column($type_searchOptions, 'linkfield'), null);
+      foreach ($type_searchOptions as $option) {
+         if (!array_key_exists('linkfield', $option)) {
+            continue;
+         }
+
+         $linkfield = $option['linkfield'];
+
+         if (null === $linkfield_preserved_option[$linkfield]
+             || ('name' === $option['field'] && 'completename' !== $linkfield_preserved_option[$linkfield]['field'])
+             || 'completename' === $option['field']) {
+            $linkfield_preserved_option[$linkfield] = $option;
+         }
+      }
+
+      $type_searchOptions = array_filter(
+         $type_searchOptions,
+         function ($option) use ($linkfield_preserved_option) {
+            return in_array($option, $linkfield_preserved_option);
+         }
+      );
+
+      return $type_searchOptions;
    }