<?php

final class PhameBlogEditController
  extends PhameController {

  public function handleRequest(AphrontRequest $request) {
    $user = $request->getUser();

    $id = $request->getURIData('id');
    if ($id) {
      $blog = id(new PhameBlogQuery())
        ->setViewer($user)
        ->withIDs(array($id))
        ->requireCapabilities(
          array(
            PhabricatorPolicyCapability::CAN_EDIT,
          ))
        ->executeOne();
      if (!$blog) {
        return new Aphront404Response();
      }

      $submit_button = pht('Save Changes');
      $page_title = pht('Edit Blog');
      $cancel_uri = $this->getApplicationURI('blog/view/'.$blog->getID().'/');
    } else {
      $blog = PhameBlog::initializeNewBlog($user);

      $submit_button = pht('Create Blog');
      $page_title = pht('Create Blog');
      $cancel_uri = $this->getApplicationURI();
    }
    $name          = $blog->getName();
    $description   = $blog->getDescription();
    $custom_domain = $blog->getDomain();
    $skin          = $blog->getSkin();
    $can_view      = $blog->getViewPolicy();
    $can_edit      = $blog->getEditPolicy();
    $can_join      = $blog->getJoinPolicy();

    $e_name               = true;
    $e_custom_domain      = null;
    $e_view_policy        = null;
    $validation_exception = null;
    if ($request->isFormPost()) {
      $name          = $request->getStr('name');
      $description   = $request->getStr('description');
      $custom_domain = nonempty($request->getStr('custom_domain'), null);
      $skin          = $request->getStr('skin');
      $can_view      = $request->getStr('can_view');
      $can_edit      = $request->getStr('can_edit');
      $can_join      = $request->getStr('can_join');

      $xactions = array(
        id(new PhameBlogTransaction())
          ->setTransactionType(PhameBlogTransaction::TYPE_NAME)
          ->setNewValue($name),
        id(new PhameBlogTransaction())
          ->setTransactionType(PhameBlogTransaction::TYPE_DESCRIPTION)
          ->setNewValue($description),
        id(new PhameBlogTransaction())
          ->setTransactionType(PhameBlogTransaction::TYPE_DOMAIN)
          ->setNewValue($custom_domain),
        id(new PhameBlogTransaction())
          ->setTransactionType(PhameBlogTransaction::TYPE_SKIN)
          ->setNewValue($skin),
        id(new PhameBlogTransaction())
          ->setTransactionType(PhabricatorTransactions::TYPE_VIEW_POLICY)
          ->setNewValue($can_view),
        id(new PhameBlogTransaction())
          ->setTransactionType(PhabricatorTransactions::TYPE_EDIT_POLICY)
          ->setNewValue($can_edit),
        id(new PhameBlogTransaction())
          ->setTransactionType(PhabricatorTransactions::TYPE_JOIN_POLICY)
          ->setNewValue($can_join),
      );

      $editor = id(new PhameBlogEditor())
        ->setActor($user)
        ->setContentSourceFromRequest($request)
        ->setContinueOnNoEffect(true);

      try {
        $editor->applyTransactions($blog, $xactions);
        return id(new AphrontRedirectResponse())
          ->setURI($this->getApplicationURI('blog/view/'.$blog->getID().'/'));
      } catch (PhabricatorApplicationTransactionValidationException $ex) {
        $validation_exception = $ex;

        $e_name = $validation_exception->getShortMessage(
          PhameBlogTransaction::TYPE_NAME);
        $e_custom_domain = $validation_exception->getShortMessage(
          PhameBlogTransaction::TYPE_DOMAIN);
        $e_view_policy = $validation_exception->getShortMessage(
          PhabricatorTransactions::TYPE_VIEW_POLICY);
      }
    }

    $policies = id(new PhabricatorPolicyQuery())
      ->setViewer($user)
      ->setObject($blog)
      ->execute();

    $skins = PhameSkinSpecification::loadAllSkinSpecifications();
    $skins = mpull($skins, 'getName');

    $form = id(new AphrontFormView())
      ->setUser($user)
      ->appendChild(
        id(new AphrontFormTextControl())
        ->setLabel(pht('Name'))
        ->setName('name')
        ->setValue($name)
        ->setID('blog-name')
        ->setError($e_name))
      ->appendChild(
        id(new PhabricatorRemarkupControl())
          ->setUser($user)
          ->setLabel(pht('Description'))
          ->setName('description')
          ->setValue($description)
          ->setID('blog-description')
          ->setUser($user)
          ->setDisableMacros(true))
      ->appendChild(
        id(new AphrontFormPolicyControl())
          ->setUser($user)
          ->setCapability(PhabricatorPolicyCapability::CAN_VIEW)
          ->setPolicyObject($blog)
          ->setPolicies($policies)
          ->setError($e_view_policy)
          ->setValue($can_view)
          ->setName('can_view'))
      ->appendChild(
        id(new AphrontFormPolicyControl())
          ->setUser($user)
          ->setCapability(PhabricatorPolicyCapability::CAN_EDIT)
          ->setPolicyObject($blog)
          ->setPolicies($policies)
          ->setValue($can_edit)
          ->setName('can_edit'))
      ->appendChild(
        id(new AphrontFormPolicyControl())
          ->setUser($user)
          ->setCapability(PhabricatorPolicyCapability::CAN_JOIN)
          ->setPolicyObject($blog)
          ->setPolicies($policies)
          ->setValue($can_join)
          ->setName('can_join'))
      ->appendChild(
        id(new AphrontFormTextControl())
        ->setLabel(pht('Custom Domain'))
        ->setName('custom_domain')
        ->setValue($custom_domain)
        ->setCaption(
          pht('Must include at least one dot (.), e.g. blog.example.com'))
        ->setError($e_custom_domain))
      ->appendChild(
        id(new AphrontFormSelectControl())
        ->setLabel(pht('Skin'))
        ->setName('skin')
        ->setValue($skin)
        ->setOptions($skins))
      ->appendChild(
        id(new AphrontFormSubmitControl())
        ->addCancelButton($cancel_uri)
        ->setValue($submit_button));

    $form_box = id(new PHUIObjectBoxView())
      ->setHeaderText($page_title)
      ->setValidationException($validation_exception)
      ->setForm($form);

    $crumbs = $this->buildApplicationCrumbs();
    $crumbs->addTextCrumb($page_title, $this->getApplicationURI('blog/new'));

    $nav = $this->renderSideNavFilterView();
    $nav->selectFilter($id ? null : 'blog/new');
    $nav->appendChild(
      array(
        $crumbs,
        $form_box,
      ));

    return $this->buildApplicationPage(
      $nav,
      array(
        'title' => $page_title,
      ));
  }
}