Show current value in configuration list; show default vs non-default values

Summary:
  - When viewing a config list, show the current effective value.
  - Add an icon showing default vs nondefault values.

Test Plan: {F28475}

Reviewers: btrahan, codeblock

Reviewed By: codeblock

CC: aran

Maniphest Tasks: T2255

Differential Revision: https://secure.phabricator.com/D4313

src/applications/config/controller/PhabricatorConfigGroupController.php

@@ -53,12 +53,44 @@ final class PhabricatorConfigGroupController
   private function buildOptionList(array $options) {
     assert_instances_of($options, 'PhabricatorConfigOption');
 
+    require_celerity_resource('config-options-css');
+
+    $db_values = array();
+    if ($options) {
+      $db_values = id(new PhabricatorConfigEntry())->loadAllWhere(
+        'configKey IN (%Ls) AND namespace = %s',
+        mpull($options, 'getKey'),
+        'default');
+      $db_values = mpull($db_values, null, 'getConfigKey');
+    }
+
+
     $list = new PhabricatorObjectItemListView();
     foreach ($options as $option) {
+      $current_value = PhabricatorEnv::getEnvConfig($option->getKey());
+      $current_value = $this->prettyPrintJSON($current_value);
+      $current_value = phutil_render_tag(
+        'div',
+        array(
+          'class' => 'config-options-current-value',
+        ),
+        '<span>'.pht('Current Value:').'</span> '.
+        phutil_escape_html($current_value));
+
+
       $item = id(new PhabricatorObjectItemView())
         ->setHeader($option->getKey())
         ->setHref('/config/edit/'.$option->getKey().'/')
-        ->addAttribute(phutil_escape_html($option->getSummary()));
+        ->addAttribute(phutil_escape_html($option->getSummary()))
+        ->appendChild($current_value);
+
+      $db_value = idx($db_values, $option->getKey());
+      if ($db_value && !$db_value->getIsDeleted()) {
+        $item->addIcon('edit', pht('Customized'));
+      } else {
+        $item->addIcon('edit-grey', pht('Default'));
+      }
+
       $list->addItem($item);
     }