<?php

/*
 * Copyright 2012 Facebook, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @group phame
 */
final class PhamePostViewController extends PhameController {

  private $postPHID;
  private $phameTitle;
  private $bloggerName;

  private function setPostPHID($post_phid) {
    $this->postPHID = $post_phid;
    return $this;
  }
  private function getPostPHID() {
    return $this->postPHID;
  }
  private function setPhameTitle($phame_title) {
    $this->phameTitle = $phame_title;
    return $this;
  }
  private function getPhameTitle() {
    return $this->phameTitle;
  }
  private function setBloggerName($blogger_name) {
    $this->bloggerName = $blogger_name;
    return $this;
  }
  private function getBloggerName() {
    return $this->bloggerName;
  }

  protected function getSideNavFilter() {
    $filter = 'post/view/'.$this->getPostPHID();
    return $filter;
  }
  protected function getSideNavExtraPostFilters() {
      $filters =  array(
        array('key'  => $this->getSideNavFilter(),
              'name' => $this->getPhameTitle())
      );
      return $filters;
  }

  public function shouldRequireLogin() {
    // TODO -- get policy logic going
    // return PhabricatorEnv::getEnvConfig('policy.allow-public');
    return true;
  }

  public function willProcessRequest(array $data) {
    $this->setPostPHID(idx($data, 'phid'));
    $this->setPhameTitle(idx($data, 'phametitle'));
    $this->setBloggerName(idx($data, 'bloggername'));
  }

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

    if ($this->getPostPHID()) {
      $post = id(new PhamePostQuery())
        ->setViewer($user)
        ->withPHIDs(array($this->getPostPHID()))
        ->executeOne();

      if (!$post) {
        return new Aphront404Response();
      }

      $this->setPhameTitle($post->getPhameTitle());
      $blogger = PhabricatorObjectHandleData::loadOneHandle(
        $post->getBloggerPHID(),
        $user);
    } else if ($this->getBloggerName() && $this->getPhameTitle()) {
      $phame_title = $this->getPhameTitle();
      $phame_title = PhabricatorSlug::normalize($phame_title);
      $blogger_user = id(new PhabricatorUser())->loadOneWhere(
        'username = %s',
        $this->getBloggerName());
      if (!$blogger_user) {
        return new Aphront404Response();
      }
      $blogger = PhabricatorObjectHandleData::loadOneHandle(
        $blogger_user->getPHID(),
        $user);
      if (!$blogger) {
        return new Aphront404Response();
      }
      $posts = id(new PhamePostQuery())
        ->setViewer($user)
        ->withBloggerPHIDs(array($blogger->getPHID()))
        ->withPhameTitles(array($phame_title))
        ->execute();
      $post = reset($posts);

      if ($post && $phame_title != $this->getPhameTitle()) {
        $uri = $post->getViewURI($this->getBloggerName());
        return id(new AphrontRedirectResponse())->setURI($uri);
      }
    }

    if (!$post) {
      return new Aphront404Response();
    }

    if ($post->isDraft() &&
        $post->getBloggerPHID() != $user->getPHID()) {
      return new Aphront404Response();
    }

    if ($post->isDraft()) {
      $notice = array(
        'title' => 'You are previewing a draft.',
        'body'  => 'Only you can see this draft until you publish it. '.
                   'If you chose a comment widget it will show up when '.
                   'you publish.'
      );
    } else if ($request->getExists('saved')) {
      $new_link = phutil_render_tag(
        'a',
        array(
          'href' => '/phame/post/new/',
          'class' => 'button green',
        ),
        'write another blog post'
      );
      $notice = array(
        'title' => 'Saved post successfully.',
        'body'  => 'Seek even more phame and '.$new_link.'.'
      );
    } else {
      $notice = array();
    }

    $actions = array('more');
    if ($post->getBloggerPHID() == $user->getPHID()) {
      $actions[] = 'edit';
    }

    $skin = new PhabricatorBlogSkin();

    $skin
      ->setUser($user)
      ->setRequestURI($request->getRequestURI())
      ->setBloggers(array($blogger->getPHID() => $blogger))
      ->setPosts(array($post))
      ->setNotice($notice)
      ->setShowPostComments(true)
      ->setActions($actions);

    $this->setShowSideNav(false);
    $this->setShowChrome($skin->getShowChrome());
    $this->setDeviceReady($skin->getDeviceReady());

    return $this->buildStandardPageResponse(
      array(
        $skin
      ),
      array(
        'title'   => $post->getTitle(),
      ));
  }
}