Add translations config group.

Summary:
Adds the translations group as per T2255. Currently `translation.override` is
`wild` -- it should be changed to dict<string, string> when that exists.

Also fixes a small bug from D4326 which caused "class" types to not ever
validate.

Test Plan:
- Looked at the settings.
- Successfully saved a setting relating to classes.

Reviewers: epriestley, btrahan

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2255

Differential Revision: https://secure.phabricator.com/D4350

src/__phutil_library_map__.php

@@ -1217,6 +1217,7 @@ phutil_register_library_map(array(
     'PhabricatorTransactions' => 'applications/transactions/constants/PhabricatorTransactions.php',
     'PhabricatorTransformedFile' => 'applications/files/storage/PhabricatorTransformedFile.php',
     'PhabricatorTranslation' => 'infrastructure/internationalization/PhabricatorTranslation.php',
+    'PhabricatorTranslationsConfigOptions' => 'applications/config/option/PhabricatorTranslationsConfigOptions.php',
     'PhabricatorTrivialTestCase' => 'infrastructure/testing/__tests__/PhabricatorTrivialTestCase.php',
     'PhabricatorTypeaheadCommonDatasourceController' => 'applications/typeahead/controller/PhabricatorTypeaheadCommonDatasourceController.php',
     'PhabricatorTypeaheadDatasourceController' => 'applications/typeahead/controller/PhabricatorTypeaheadDatasourceController.php',
@@ -2518,6 +2519,7 @@ phutil_register_library_map(array(
     'PhabricatorTimer' => 'PhabricatorCountdownDAO',
     'PhabricatorTransactionView' => 'AphrontView',
     'PhabricatorTransformedFile' => 'PhabricatorFileDAO',
+    'PhabricatorTranslationsConfigOptions' => 'PhabricatorApplicationConfigOptions',
     'PhabricatorTrivialTestCase' => 'PhabricatorTestCase',
     'PhabricatorTypeaheadCommonDatasourceController' => 'PhabricatorTypeaheadDatasourceController',
     'PhabricatorTypeaheadDatasourceController' => 'PhabricatorController',

src/applications/config/controller/PhabricatorConfigEditController.php

@@ -361,7 +361,7 @@ final class PhabricatorConfigEditController
           ->setConcreteOnly(true)
           ->selectSymbolsWithoutLoading();
         $names = ipull($symbols, 'name', 'name');
-        sort($names);
+        asort($names);
         $names = array(
           '' => pht('(Use Default)'),
         ) + $names;

src/applications/config/option/PhabricatorTranslationsConfigOptions.php

@@ -0,0 +1,43 @@
+<?php
+
+final class PhabricatorTranslationsConfigOptions
+  extends PhabricatorApplicationConfigOptions {
+
+  public function getName() {
+    return pht("Translations");
+  }
+
+  public function getDescription() {
+    return pht("Options relating to translations.");
+  }
+
+  public function getOptions() {
+    return array(
+      $this->newOption(
+        'translation.provider',
+        'class',
+        'PhabricatorEnglishTranslation')
+        ->setBaseClass('PhabricatorTranslation')
+        ->setSummary(pht("Translation class that should be used for strings."))
+        ->setDescription(
+          pht(
+            "This allows customizing texts used in Phabricator. The class ".
+            "must extend PhabricatorTranslation."))
+        ->addExample('PhabricatorEnglishTranslation', pht('Valid Setting')),
+      // TODO: This should be dict<string,string> I think, but that doesn't
+      // exist yet.
+      $this->newOption('translation.override', 'wild', array())
+        ->setSummary(pht("Override translations."))
+        ->setDescription(
+          pht(
+            "You can use 'translation.override' if you don't want to create ".
+            "a full translation to give users an option for switching to it ".
+            "and you just want to override some strings in the default ".
+            "translation."))
+        ->addExample(
+          '{"some string": "my alternative"}',
+          pht('Valid Setting')),
+    );
+  }
+
+}