Index: content.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/cck/content.module,v
retrieving revision 1.48
diff -u -r1.48 content.module
--- content.module	16 Apr 2006 13:38:00 -0000	1.48
+++ content.module	2 May 2006 06:17:42 -0000
@@ -749,3 +747,69 @@
   return $result;
 }
 
+/**
+ * Implementation hook_views_arguments.
+ */
+function content_views_arguments() {
+  $field_types = _content_field_types();
+  $arguments = array();
+  foreach (_content_fields() as $field) {
+    $module = $field_types[$field['type']]['module'];
+    $argument = array();
+    $argument['name'] = $field_types[$field['type']]['label'] .': '. $field['widget']['label'] .' ('. $field['field_name'] .')';
+
+    // If a field module implements its own handler use it,
+    // instead of the default content.module handler. 
+    if (function_exists($module.'_views_argument_handler')) {
+      $argument['handler'] = $module.'_views_argument_handler';
+    }
+    else {
+      $argument['handler'] = 'content_views_argument_handler';
+    }
+
+    $argument['help'] = t('This argument allows users to filter nodes according to field %name.', theme('placeholder',array('name' => $argument['name'])));
+    $argument['table'] = 'node_data_'. $field['field_name'];
+    $argument['field'] = $field;
+    $arguments['field_'.$field['field_name'].'_'.$field['widget']['label']] = $argument;      
+  }
+  return $arguments;
+}
+
+/**
+ * Shared views_arguments handler for CCK.
+ * @todo support multi value fields,
+ * @todo support multiple arguments for a single view.
+ */
+
+
+function content_views_argument_handler($op, &$query, $argtype, $arg = '') {
+  $argdata = _views_get_arguments();
+  $field = $argdata[$argtype['type']]['field'];
+  $field_types = _content_field_types();
+  $module = $field_types[$field['type']]['module'];
+  $columns = module_invoke($module, 'field_settings', 'database columns', $field);
+
+  // Only return data if fieldtype implements storage through content.module.
+  if (is_array($columns) && count($columns)) { 
+    switch($op) {
+      case 'summary':
+        drupal_set_message('<pre>'.print_r($columns, true).'</pre>');
+        foreach($columns as $columnname => $columndata) {
+          $query->addfield($columnname);
+        }
+        $query->addtable('node_data_'. $field['field_name']);
+        break;
+      case 'filter':
+        $query->ensure_table('node_data_'. $field['field_name']);
+        foreach($columns as $columnname => $columndata) {
+          $query->add_where('node_data_'. $field['field_name'] .'.'. $field['field_name'] .'_'. $columnname .' = '. $arg);
+        }
+        break;
+      case 'link':
+        break;
+      case 'title':
+        break;
+    }
+  }
+}
+