When a user changes their timezone, clear their ignored timezone offset

Summary:
Ref T4103. We have a couple of settings like this where changing one setting changes another (e.g., enabling DarkConsole makes the console visible).

Provide a mechanism to let changing timezone really mean "change timezone, and also clear the timezone offset".

Test Plan: Swapped timezones, reconciled them by ignoring the offset, changed timezone again to another zone with the same offset, got asked to reconcile again.

Reviewers: chad

Reviewed By: chad

Maniphest Tasks: T4103

Differential Revision: https://secure.phabricator.com/D16018

src/applications/settings/editor/PhabricatorUserPreferencesEditor.php

@@ -19,6 +19,23 @@ final class PhabricatorUserPreferencesEditor
     return $types;
   }
 
+  protected function expandTransaction(
+    PhabricatorLiskDAO $object,
+    PhabricatorApplicationTransaction $xaction) {
+
+    $setting_key = $xaction->getMetadataValue(
+      PhabricatorUserPreferencesTransaction::PROPERTY_SETTING);
+
+    $settings = $this->getSettings();
+    $setting = idx($settings, $setting_key);
+    if ($setting) {
+      return $setting->expandSettingTransaction($object, $xaction);
+    }
+
+    return parent::expandTransaction($object, $xaction);
+  }
+
+
   protected function getCustomTransactionOldValue(
     PhabricatorLiskDAO $object,
     PhabricatorApplicationTransaction $xaction) {
@@ -95,15 +112,7 @@ final class PhabricatorUserPreferencesEditor
     array $xactions) {
 
     $errors = parent::validateTransaction($object, $type, $xactions);
-
-    $actor = $this->getActor();
-    $settings = PhabricatorSetting::getAllEnabledSettings($actor);
-
-    foreach ($settings as $key => $setting) {
-      $setting = clone $setting;
-      $setting->setViewer($actor);
-      $settings[$key] = $setting;
-    }
+    $settings = $this->getSettings();
 
     switch ($type) {
       case PhabricatorUserPreferencesTransaction::TYPE_SETTING:
@@ -157,4 +166,17 @@ final class PhabricatorUserPreferencesEditor
     return $xactions;
   }
 
+  private function getSettings() {
+    $actor = $this->getActor();
+    $settings = PhabricatorSetting::getAllEnabledSettings($actor);
+
+    foreach ($settings as $key => $setting) {
+      $setting = clone $setting;
+      $setting->setViewer($actor);
+      $settings[$key] = $setting;
+    }
+
+    return $settings;
+  }
+
 }

src/applications/settings/setting/PhabricatorSetting.php

@@ -111,4 +111,18 @@ abstract class PhabricatorSetting extends Phobject {
     return $value;
   }
 
+  public function expandSettingTransaction($object, $xaction) {
+    return array($xaction);
+  }
+
+  protected function newSettingTransaction($object, $key, $value) {
+    $setting_property = PhabricatorUserPreferencesTransaction::PROPERTY_SETTING;
+    $xaction_type = PhabricatorUserPreferencesTransaction::TYPE_SETTING;
+
+    return id(clone $object->getApplicationTransactionTemplate())
+      ->setTransactionType($xaction_type)
+      ->setMetadataValue($setting_property, $key)
+      ->setNewValue($value);
+  }
+
 }

src/applications/settings/setting/PhabricatorTimezoneSetting.php

@@ -87,4 +87,16 @@ final class PhabricatorTimezoneSetting
     return $option_groups;
   }
 
+  public function expandSettingTransaction($object, $xaction) {
+    // When the user changes their timezone, we also clear any ignored
+    // timezone offset.
+    return array(
+      $xaction,
+      $this->newSettingTransaction(
+        $object,
+        PhabricatorTimezoneIgnoreOffsetSetting::SETTINGKEY,
+        null),
+    );
+  }
+
 }