phorge-phorge/src/applications/settings/panel/PhabricatorSettingsPanelDiffPreferences.php

<?php

final class PhabricatorSettingsPanelDiffPreferences
  extends PhabricatorSettingsPanel {

  public function getPanelKey() {
    return 'diff';
  }

  public function getPanelName() {
    return pht('Diff Preferences');
  }

  public function getPanelGroup() {
    return pht('Application Settings');
  }

  public function processRequest(AphrontRequest $request) {
    $user = $request->getUser();
    $preferences = $user->loadPreferences();

    $pref_filetree = PhabricatorUserPreferences::PREFERENCE_DIFF_FILETREE;

    if ($request->isFormPost()) {
      $preferences->setPreference(
        $pref_filetree,
        $request->getInt($pref_filetree));

      $preferences->save();
      return id(new AphrontRedirectResponse())
        ->setURI($this->getPanelURI('?saved=true'));
    }

    $form = id(new AphrontFormView())
      ->setUser($user)
      ->appendChild(
        id(new AphrontFormSelectControl())
          ->setLabel(pht('Show Filetree'))
          ->setName($pref_filetree)
          ->setValue($preferences->getPreference($pref_filetree))
          ->setOptions(
            array(
              0 => pht('Disable Filetree'),
              1 => pht('Enable Filetree'),
            ))
          ->setCaption(
            pht("When looking at a revision or commit, show affected files ".
                "in a sidebar.")))
      ->appendChild(
        id(new AphrontFormSubmitControl())
          ->setValue(pht('Save Preferences')));

    $panel = new AphrontPanelView();
    $panel->setHeader(pht('Diff Preferences'));
    $panel->appendChild($form);
    $panel->setNoBackground();

    $error_view = null;
    if ($request->getBool('saved')) {
      $error_view = id(new AphrontErrorView())
        ->setTitle(pht('Preferences Saved'))
        ->setSeverity(AphrontErrorView::SEVERITY_NOTICE)
        ->setErrors(array(pht('Your preferences have been saved.')));
    }

    return array(
      $error_view,
      $panel,
    );
  }
}