/**
   * Article rewards.
   *
   * @param request the specified http servlet request
   * @param response the specified http servlet response
   * @param context the specified http request context
   * @throws Exception exception
   */
  @RequestProcessing(value = "/article/reward", method = HTTPRequestMethod.POST)
  @Before(adviceClass = StopwatchStartAdvice.class)
  @After(adviceClass = StopwatchEndAdvice.class)
  public void reward(
      final HttpServletRequest request,
      final HttpServletResponse response,
      final HTTPRequestContext context)
      throws Exception {
    final JSONObject currentUser = userQueryService.getCurrentUser(request);
    if (null == currentUser) {
      response.sendError(HttpServletResponse.SC_FORBIDDEN);

      return;
    }

    final String articleId = request.getParameter(Article.ARTICLE_T_ID);
    if (Strings.isEmptyOrNull(articleId)) {
      response.sendError(HttpServletResponse.SC_BAD_REQUEST);

      return;
    }

    final JSONRenderer renderer = new JSONRenderer();
    context.setRenderer(renderer);
    final JSONObject result = Results.falseResult();
    renderer.setJSONObject(result);

    try {
      articleMgmtService.reward(articleId, currentUser.optString(Keys.OBJECT_ID));
    } catch (final ServiceException e) {
      result.put(Keys.MSG, langPropsService.get("transferFailLabel"));

      return;
    }

    final JSONObject article = articleQueryService.getArticle(articleId);
    if (null == article) {
      return;
    }

    result.put(Keys.STATUS_CODE, true);
    articleQueryService.processArticleContent(article, request);
    result.put(Article.ARTICLE_REWARD_CONTENT, article.optString(Article.ARTICLE_REWARD_CONTENT));
  }
  /**
   * Updates an article remotely.
   *
   * <p>This interface will be called by Rhythm, so here is no article data validation, just only
   * validate the B3 key.
   *
   * <p>The request json object, for example,
   *
   * <pre>
   * {
   *     "article": {
   *         "articleAuthorEmail": "*****@*****.**",
   *         "articleContent": "&lt;p&gt;test&lt;\/p&gt;",
   *         "articleCreateDate": 1350635469922,
   *         "articlePermalink": "/articles/2012/10/19/1350635469866.html",
   *         "articleTags": "test",
   *         "articleTitle": "test",
   *         "clientArticleId": "1350635469866",
   *         "oId": "1350635469866"
   *     },
   *     "clientAdminEmail": "*****@*****.**",
   *     "clientHost": "http://localhost:11099",
   *     "clientName": "B3log Solo",
   *     "clientTitle": "简约设计の艺术",
   *     "clientRuntimeEnv": "LOCAL",
   *     "clientVersion": "0.5.0",
   *     "symphonyKey": "....",
   *     "userB3Key": "Your key"
   * }
   * </pre>
   *
   * @param context the specified context
   * @param request the specified request
   * @param response the specified response
   * @throws Exception exception
   */
  @RequestProcessing(value = "/rhythm/article", method = HTTPRequestMethod.PUT)
  @Before(adviceClass = StopwatchStartAdvice.class)
  @After(adviceClass = StopwatchEndAdvice.class)
  public void updateArticleFromRhythm(
      final HTTPRequestContext context,
      final HttpServletRequest request,
      final HttpServletResponse response)
      throws Exception {
    final JSONRenderer renderer = new JSONRenderer();
    context.setRenderer(renderer);

    final JSONObject ret = Results.falseResult();
    renderer.setJSONObject(ret);

    final JSONObject requestJSONObject = Requests.parseRequestJSONObject(request, response);

    final String userB3Key = requestJSONObject.getString(UserExt.USER_B3_KEY);
    final String symphonyKey = requestJSONObject.getString(Common.SYMPHONY_KEY);
    final String clientAdminEmail = requestJSONObject.getString(Client.CLIENT_ADMIN_EMAIL);
    final String clientName = requestJSONObject.getString(Client.CLIENT_NAME);
    final String clientTitle = requestJSONObject.getString(Client.CLIENT_T_TITLE);
    final String clientVersion = requestJSONObject.getString(Client.CLIENT_VERSION);
    final String clientHost = requestJSONObject.getString(Client.CLIENT_HOST);
    final String clientRuntimeEnv = requestJSONObject.getString(Client.CLIENT_RUNTIME_ENV);

    final String maybeIP = StringUtils.substringBetween(clientHost, "://", ":");
    if (Networks.isIPv4(maybeIP)) {
      LOGGER.log(
          Level.WARN,
          "Sync update article error, caused by the client host [{0}] is invalid",
          clientHost);

      return;
    }

    final JSONObject user = userQueryService.getUserByEmail(clientAdminEmail);
    if (null == user) {
      LOGGER.log(
          Level.WARN,
          "The user[email={0}, host={1}] not found in community",
          clientAdminEmail,
          clientHost);

      return;
    }

    final String userName = user.optString(User.USER_NAME);

    if (!Symphonys.get("keyOfSymphony").equals(symphonyKey)
        || !user.optString(UserExt.USER_B3_KEY).equals(userB3Key)) {
      LOGGER.log(
          Level.WARN,
          "B3 key not match, ignored update article [name={0}, host={1}]",
          userName,
          clientHost);

      return;
    }

    if (UserExt.USER_STATUS_C_VALID != user.optInt(UserExt.USER_STATUS)) {
      LOGGER.log(
          Level.WARN, "The user[name={0}, host={1}] has been forbidden", userName, clientHost);

      return;
    }

    final JSONObject originalArticle = requestJSONObject.getJSONObject(Article.ARTICLE);

    final String articleTitle = originalArticle.optString(Article.ARTICLE_TITLE);
    String articleTags =
        articleMgmtService.formatArticleTags(originalArticle.optString(Article.ARTICLE_TAGS));
    String articleContent = originalArticle.optString(Article.ARTICLE_CONTENT);

    final String permalink = originalArticle.optString(Article.ARTICLE_PERMALINK);
    articleContent +=
        "<p class='fn-clear'><span class='fn-right'><span class='ft-small'>该文章同步自</span> "
            + "<i style='margin-right:5px;'><a target='_blank' href='"
            + clientHost
            + permalink
            + "'>"
            + clientTitle
            + "</a></i></span></p>";

    final String authorId = user.optString(Keys.OBJECT_ID);
    final String clientArticleId = originalArticle.optString(Keys.OBJECT_ID);
    final JSONObject oldArticle =
        articleQueryService.getArticleByClientArticleId(authorId, clientArticleId);
    if (null == oldArticle) {
      LOGGER.log(
          Level.WARN,
          "Not found article [clientHost={0}, clientArticleId={1}] to update",
          clientHost,
          clientArticleId);

      return;
    }

    final JSONObject article = new JSONObject();
    article.put(Keys.OBJECT_ID, oldArticle.optString(Keys.OBJECT_ID));
    article.put(Article.ARTICLE_TITLE, articleTitle);
    article.put(Article.ARTICLE_CONTENT, articleContent);
    article.put(Article.ARTICLE_EDITOR_TYPE, 0);
    article.put(Article.ARTICLE_SYNC_TO_CLIENT, false);
    article.put(Article.ARTICLE_CLIENT_ARTICLE_ID, clientArticleId);
    article.put(Article.ARTICLE_AUTHOR_ID, authorId);
    article.put(Article.ARTICLE_AUTHOR_EMAIL, clientAdminEmail.toLowerCase().trim());
    article.put(Article.ARTICLE_T_IS_BROADCAST, false);

    if (!Role.ADMIN_ROLE.equals(user.optString(User.USER_ROLE))) {
      articleTags = articleMgmtService.filterReservedTags(articleTags);
    }

    try {
      if (Strings.isEmptyOrNull(articleTags)) {
        throw new ServiceException(langPropsService.get("articleTagReservedLabel"));
      }

      article.put(Article.ARTICLE_TAGS, articleTags);

      articleMgmtService.updateArticle(article);

      ret.put(Keys.STATUS_CODE, true);
    } catch (final ServiceException e) {
      final String msg = langPropsService.get("updateFailLabel") + " - " + e.getMessage();
      LOGGER.log(Level.ERROR, msg, e);

      ret.put(Keys.MSG, msg);
    }

    // Updates client record
    JSONObject client = clientQueryService.getClientByAdminEmail(clientAdminEmail);
    if (null == client) {
      client = new JSONObject();
      client.put(Client.CLIENT_ADMIN_EMAIL, clientAdminEmail);
      client.put(Client.CLIENT_HOST, clientHost);
      client.put(Client.CLIENT_NAME, clientName);
      client.put(Client.CLIENT_RUNTIME_ENV, clientRuntimeEnv);
      client.put(Client.CLIENT_VERSION, clientVersion);
      client.put(Client.CLIENT_LATEST_ADD_COMMENT_TIME, 0L);
      client.put(Client.CLIENT_LATEST_ADD_ARTICLE_TIME, System.currentTimeMillis());

      clientMgmtService.addClient(client);
    } else {
      client.put(Client.CLIENT_ADMIN_EMAIL, clientAdminEmail);
      client.put(Client.CLIENT_HOST, clientHost);
      client.put(Client.CLIENT_NAME, clientName);
      client.put(Client.CLIENT_RUNTIME_ENV, clientRuntimeEnv);
      client.put(Client.CLIENT_VERSION, clientVersion);
      client.put(Client.CLIENT_LATEST_ADD_ARTICLE_TIME, System.currentTimeMillis());

      clientMgmtService.updateClient(client);
    }
  }
  /**
   * Updates an article locally.
   *
   * <p>The request json object (an article):
   *
   * <pre>
   * {
   *   "articleTitle": "",
   *   "articleTags": "", // Tags spliting by ','
   *   "articleContent": "",
   *   "articleCommentable": boolean,
   *   "articleType": int,
   *   "articleRewardContent": "",
   *   "articleRewardPoint": int
   * }
   * </pre>
   *
   * @param context the specified context
   * @param request the specified request
   * @param response the specified response
   * @param id the specified article id
   * @throws Exception exception
   */
  @RequestProcessing(value = "/article/{id}", method = HTTPRequestMethod.PUT)
  @Before(
      adviceClass = {
        StopwatchStartAdvice.class,
        LoginCheck.class,
        CSRFCheck.class,
        ArticleUpdateValidation.class
      })
  @After(adviceClass = StopwatchEndAdvice.class)
  public void updateArticle(
      final HTTPRequestContext context,
      final HttpServletRequest request,
      final HttpServletResponse response,
      final String id)
      throws Exception {
    if (Strings.isEmptyOrNull(id)) {
      response.sendError(HttpServletResponse.SC_NOT_FOUND);

      return;
    }

    final JSONObject oldArticle = articleQueryService.getArticleById(id);
    if (null == oldArticle) {
      response.sendError(HttpServletResponse.SC_NOT_FOUND);

      return;
    }

    final JSONRenderer renderer = new JSONRenderer();
    context.setRenderer(renderer);

    final JSONObject ret = Results.falseResult();
    renderer.setJSONObject(ret);

    final JSONObject requestJSONObject = (JSONObject) request.getAttribute(Keys.REQUEST);

    final String articleTitle = requestJSONObject.optString(Article.ARTICLE_TITLE);
    String articleTags = requestJSONObject.optString(Article.ARTICLE_TAGS);
    final String articleContent = requestJSONObject.optString(Article.ARTICLE_CONTENT);
    // final boolean articleCommentable = requestJSONObject.optBoolean(Article.ARTICLE_COMMENTABLE);
    final boolean articleCommentable = true;
    final int articleType =
        requestJSONObject.optInt(Article.ARTICLE_TYPE, Article.ARTICLE_TYPE_C_NORMAL);
    final String articleRewardContent = requestJSONObject.optString(Article.ARTICLE_REWARD_CONTENT);
    final int articleRewardPoint = requestJSONObject.optInt(Article.ARTICLE_REWARD_POINT);

    final JSONObject article = new JSONObject();
    article.put(Keys.OBJECT_ID, id);
    article.put(Article.ARTICLE_TITLE, articleTitle);
    article.put(Article.ARTICLE_CONTENT, articleContent);
    article.put(Article.ARTICLE_EDITOR_TYPE, 0);
    article.put(Article.ARTICLE_COMMENTABLE, articleCommentable);
    article.put(Article.ARTICLE_TYPE, articleType);
    article.put(Article.ARTICLE_REWARD_CONTENT, articleRewardContent);
    article.put(Article.ARTICLE_REWARD_POINT, articleRewardPoint);

    final JSONObject currentUser = (JSONObject) request.getAttribute(User.USER);
    if (null == currentUser
        || !currentUser
            .optString(Keys.OBJECT_ID)
            .equals(oldArticle.optString(Article.ARTICLE_AUTHOR_ID))) {
      response.sendError(HttpServletResponse.SC_FORBIDDEN);

      return;
    }

    article.put(Article.ARTICLE_AUTHOR_ID, currentUser.optString(Keys.OBJECT_ID));

    final String authorEmail = currentUser.optString(User.USER_EMAIL);
    article.put(Article.ARTICLE_AUTHOR_EMAIL, authorEmail);

    if (!Role.ADMIN_ROLE.equals(currentUser.optString(User.USER_ROLE))) {
      articleTags = articleMgmtService.filterReservedTags(articleTags);
    }

    try {
      if (Strings.isEmptyOrNull(articleTags)) {
        throw new ServiceException(langPropsService.get("articleTagReservedLabel"));
      }

      article.put(Article.ARTICLE_TAGS, articleTags);

      articleMgmtService.updateArticle(article);
      ret.put(Keys.STATUS_CODE, true);
    } catch (final ServiceException e) {
      final String msg = e.getMessage();
      LOGGER.log(
          Level.ERROR, "Adds article[title=" + articleTitle + "] failed: {0}", e.getMessage());

      ret.put(Keys.MSG, msg);
    }
  }
  /**
   * Gets article preview content.
   *
   * <p>Renders the response with a json object, for example,
   *
   * <pre>
   * {
   *     "html": ""
   * }
   * </pre>
   *
   * @param request the specified http servlet request
   * @param response the specified http servlet response
   * @param context the specified http request context
   * @param articleId the specified article id
   * @throws Exception exception
   */
  @RequestProcessing(value = "/article/{articleId}/preview", method = HTTPRequestMethod.GET)
  @Before(adviceClass = StopwatchStartAdvice.class)
  @After(adviceClass = StopwatchEndAdvice.class)
  public void getArticlePreviewContent(
      final HttpServletRequest request,
      final HttpServletResponse response,
      final HTTPRequestContext context,
      final String articleId)
      throws Exception {
    final JSONRenderer renderer = new JSONRenderer();
    context.setRenderer(renderer);
    final JSONObject result = Results.trueResult();
    renderer.setJSONObject(result);

    result.put("html", "");

    final JSONObject article = articleQueryService.getArticle(articleId);
    if (null == article) {
      result.put(Keys.STATUS_CODE, false);

      return;
    }

    final int length = Integer.valueOf("150");
    String content = article.optString(Article.ARTICLE_CONTENT);
    final String authorId = article.optString(Article.ARTICLE_AUTHOR_ID);
    final JSONObject author = userQueryService.getUser(authorId);

    if (null != author && UserExt.USER_STATUS_C_INVALID == author.optInt(UserExt.USER_STATUS)
        || Article.ARTICLE_STATUS_C_INVALID == article.optInt(Article.ARTICLE_STATUS)) {
      result.put("html", langPropsService.get("articleContentBlockLabel"));

      return;
    }

    final Set<String> userNames = userQueryService.getUserNames(content);
    final JSONObject currentUser = userQueryService.getCurrentUser(request);
    final String currentUserName = null == currentUser ? "" : currentUser.optString(User.USER_NAME);
    final String authorName = author.optString(User.USER_NAME);
    if (Article.ARTICLE_TYPE_C_DISCUSSION == article.optInt(Article.ARTICLE_TYPE)
        && !authorName.equals(currentUserName)) {
      boolean invited = false;
      for (final String userName : userNames) {
        if (userName.equals(currentUserName)) {
          invited = true;

          break;
        }
      }

      if (!invited) {
        String blockContent = langPropsService.get("articleDiscussionLabel");
        blockContent =
            blockContent.replace(
                "{user}",
                "<a href='"
                    + Latkes.getServePath()
                    + "/member/"
                    + authorName
                    + "'>"
                    + authorName
                    + "</a>");

        result.put("html", blockContent);

        return;
      }
    }

    content = Emotions.convert(content);
    content = Markdowns.toHTML(content);

    content = Jsoup.clean(content, Whitelist.none());
    if (content.length() >= length) {
      content = StringUtils.substring(content, 0, length) + " ....";
    }

    result.put("html", content);
  }