# ReplyResource.java

    /*
     * Copyright (C) 2000 - 2024 Silverpeas
     *
     * This program is free software: you can redistribute it and/or modify
     * it under the terms of the GNU Affero General Public License as
     * published by the Free Software Foundation, either version 3 of the
     * License, or (at your option) any later version.
     *
     * As a special exception to the terms and conditions of version 3.0 of
     * the GPL, you may redistribute this Program in connection with Free/Libre
     * Open Source Software ("FLOSS") applications as described in Silverpeas's
     * FLOSS exception. You should have received a copy of the text describing
     * the FLOSS exception, and it is also available here:
     * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     * GNU Affero General Public License for more details.
     *
     * You should have received a copy of the GNU Affero General Public License
     * along with this program. If not, see <https://www.gnu.org/licenses/>.
     */
    package org.silverpeas.components.questionreply.web;

    import jakarta.inject.Inject;
    import jakarta.ws.rs.*;
    import jakarta.ws.rs.core.MediaType;
    import jakarta.ws.rs.core.Response.Status;
    import org.silverpeas.components.questionreply.QuestionReplyException;
    import org.silverpeas.components.questionreply.model.Reply;
    import org.silverpeas.components.questionreply.service.QuestionManager;
    import org.silverpeas.core.admin.user.model.SilverpeasRole;
    import org.silverpeas.core.annotation.WebService;
    import org.silverpeas.core.contribution.attachment.AttachmentService;
    import org.silverpeas.core.contribution.attachment.model.SimpleDocument;
    import org.silverpeas.core.web.rs.annotation.Authorized;

    import java.net.URI;
    import java.util.ArrayList;
    import java.util.Collection;
    import java.util.List;
    import java.util.stream.Collectors;

    /**
     * A REST Web resource representing a given reply to a question. It is a web service that provides
     * access to a reply referenced by its URL.
     */
    @WebService
    @Path(QuestionReplyBaseWebService.PATH + "/{componentId}/replies")
    @Authorized
    public class ReplyResource extends QuestionReplyBaseWebService {

      @PathParam("componentId")
      protected String componentId;

      @Inject
      private QuestionManager questionManager;

      @Inject
      private AttachmentService attachmentService;

      @Override
      public String getComponentId() {
        return this.componentId;
      }

      /**
       * Gets the JSON representation of the specified existing question. If the reply doesn't exist, a
       * 404 HTTP code is returned. If the user isn't authentified, a 401 HTTP code is returned. If the
       * user isn't authorized to access the question, a 403 is returned. If a problem occurs when
       * processing the request, a 503 HTTP code is returned.
       *
       * @param onQuestionId the unique identifier of the question.
       * @return the response to the HTTP GET request with the JSON representation of the asked question
       * replies.
       */
      @GET
      @Path("question/{questionId}")
      @Produces(MediaType.APPLICATION_JSON)
      public List<ReplyEntity> getAllRepliesForQuestion(@PathParam("questionId") String onQuestionId) {
        try {
          long questionId = Long.parseLong(onQuestionId);
          List<Reply> replies = questionManager.getAllReplies(questionId,
              componentId);
          return asWebEntities(extractVisibleReplies(questionId, replies), getUserProfile());
        } catch (Exception ex) {
          throw new WebApplicationException(ex, Status.SERVICE_UNAVAILABLE);
        }
      }

      @GET
      @Produces(MediaType.APPLICATION_JSON)
      @Path("public/question/{questionId}")
      public List<ReplyEntity> getPublicRepliesForQuestion(@PathParam("questionId") String onQuestionId) {
        try {
          List<Reply> replies = questionManager.getQuestionPublicReplies(
              Long.parseLong(onQuestionId), componentId);
          return asWebEntities(replies, getUserProfile());
        } catch (Exception ex) {
          throw new WebApplicationException(ex, Status.SERVICE_UNAVAILABLE);
        }
      }

      protected URI identifiedBy(URI uri) {
        return uri;
      }

      /**
       * Converts the specified list of replies into their corresponding web entities.
       *
       * @param replies the replies to convert.
       * @param profile the profile of the user.
       * @return a list with the corresponding reply entities.
       */
      protected List<ReplyEntity> asWebEntities(List<Reply> replies, SilverpeasRole profile) {
        return replies.stream()
            .map(r -> {
              URI commentURI = getUri().getRequestUriBuilder().path(r.getPK().getId()).build();
              return asWebEntity(r, identifiedBy(commentURI), profile);
            })
            .collect(Collectors.toList());
      }

      /**
       * Converts the reply into its corresponding web entity.
       *
       * @param reply the reply to convert.
       * @param replyURI the URI of the reply.
       * @param profile the profile of the user.
       * @return the corresponding reply entity.
       */
      protected ReplyEntity asWebEntity(final Reply reply, URI replyURI, SilverpeasRole profile) {
        ReplyEntity entity = ReplyEntity.fromReply(reply, getUserPreferences().getLanguage()).withURI(
            replyURI).withProfile(profile);
        Collection<SimpleDocument> attachments =
            attachmentService.listDocumentsByForeignKey(reply.getPK().toResourceReference(),
                entity.getLanguage());
        entity.withAttachments(attachments);
        AuthorEntity author = AuthorEntity.fromUser(reply.readAuthor());
        author.setAvatar(getHttpServletRequest().getContextPath() + author.getAvatar());
        return entity;
      }

      boolean isReplyVisible(String questionAuthor, Reply reply, SilverpeasRole role,
          String userId) {
        boolean isPrivate = reply.getPublicReply() <= 0;
        if (isPrivate) {
          boolean isAuthor = questionAuthor.equals(userId);
          return SilverpeasRole.USER != role && (SilverpeasRole.PUBLISHER != role || isAuthor);
        }
        return true;
      }

      List<Reply> extractVisibleReplies(long questionId, List<Reply> replies) throws
          QuestionReplyException {
        List<Reply> visibleReplies = new ArrayList<>(replies.size());
        String authorId = questionManager.getQuestion(questionId).
            getCreatorId();
        SilverpeasRole profile = getUserProfile();
        String userid = getUser().getId();
        for (Reply reply : replies) {
          if (isReplyVisible(authorId, reply, profile, userid)) {
            visibleReplies.add(reply);
          }
        }
        return visibleReplies;
      }
    }