<?php

final class PhameBlogEditController
  extends PhameController {

  private $id;

  public function willProcessRequest(array $data) {
    $this->id = idx($data, 'id');
  }

  public function processRequest() {
    $request = $this->getRequest();
    $user = $request->getUser();

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

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

      $blog->setViewPolicy(PhabricatorPolicies::POLICY_USER);
      $blog->setEditPolicy(PhabricatorPolicies::POLICY_USER);
      $blog->setJoinPolicy(PhabricatorPolicies::POLICY_USER);

      $submit_button = pht('Create Blog');
      $page_title = pht('Create Blog');
      $cancel_uri = $this->getApplicationURI();
    }

    $e_name          = true;
    $e_custom_domain = null;
    $errors          = array();

    if ($request->isFormPost()) {
      $name          = $request->getStr('name');
      $description   = $request->getStr('description');
      $custom_domain = $request->getStr('custom_domain');
      $skin          = $request->getStr('skin');

      if (empty($name)) {
        $errors[] = pht('You must give the blog a name.');
        $e_name = pht('Required');
      } else {
        $e_name = null;
      }

      $blog->setName($name);
      $blog->setDescription($description);
      $blog->setDomain(nonempty($custom_domain, null));
      $blog->setSkin($skin);
      $blog->setViewPolicy($request->getStr('can_view'));
      $blog->setEditPolicy($request->getStr('can_edit'));
      $blog->setJoinPolicy($request->getStr('can_join'));

      if (!empty($custom_domain)) {
        list($error_label, $error_text) =
          $blog->validateCustomDomain($custom_domain);
        if ($error_label) {
          $errors[] = $error_text;
          $e_custom_domain = $error_label;
        }
        if ($blog->getViewPolicy() != PhabricatorPolicies::POLICY_PUBLIC) {
          $errors[] = pht(
            'For custom domains to work, the blog must have a view policy of '.
            'public.');
          // Prefer earlier labels for the multiple error scenario.
          if (!$e_custom_domain) {
            $e_custom_domain = pht('Invalid Policy');
          }
        }
      }

      // Don't let users remove their ability to edit blogs.
      PhabricatorPolicyFilter::mustRetainCapability(
        $user,
        $blog,
        PhabricatorPolicyCapability::CAN_EDIT);

      if (!$errors) {
        try {
          $blog->save();
          return id(new AphrontRedirectResponse())
            ->setURI($this->getApplicationURI('blog/view/'.$blog->getID().'/'));
        } catch (AphrontDuplicateKeyQueryException $ex) {
          $errors[] = pht('Domain must be unique.');
          $e_custom_domain = pht('Not Unique');
        }
      }
    }

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

    $form_box = id(new PHUIObjectBoxView())
      ->setHeaderText($page_title)
      ->setFormErrors($errors)
      ->setForm($form);

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

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

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