src/main/java/eu/mulk/mulkcms2/benki/lazychat/LazychatResource.java

package eu.mulk.mulkcms2.benki.lazychat;

import static javax.ws.rs.core.MediaType.TEXT_HTML;

import eu.mulk.mulkcms2.benki.accesscontrol.Role;
import eu.mulk.mulkcms2.benki.users.User;
import io.quarkus.qute.Template;
import io.quarkus.qute.TemplateExtension;
import io.quarkus.qute.TemplateInstance;
import io.quarkus.qute.api.ResourcePath;
import io.quarkus.security.Authenticated;
import io.quarkus.security.identity.SecurityIdentity;
import java.net.URI;
import java.net.URISyntaxException;
import java.time.OffsetDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.FormatStyle;
import java.time.temporal.TemporalAccessor;
import java.util.Set;
import javax.annotation.CheckForNull;
import javax.inject.Inject;
import javax.json.spi.JsonProvider;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.transaction.Transactional;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Pattern;
import javax.ws.rs.BadRequestException;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.QueryParam;
import javax.ws.rs.core.Response;
import org.eclipse.microprofile.config.inject.ConfigProperty;
import org.hibernate.Session;
import org.jboss.logging.Logger;

@Path("/lazychat")
public class LazychatResource {

  private static final Logger log = Logger.getLogger(LazychatResource.class);

  private static final DateTimeFormatter htmlDateFormatter = DateTimeFormatter.ISO_OFFSET_DATE_TIME;

  private static final DateTimeFormatter humanDateFormatter =
      DateTimeFormatter.ofLocalizedDateTime(FormatStyle.LONG, FormatStyle.SHORT);

  private static final JsonProvider jsonProvider = JsonProvider.provider();

  @ConfigProperty(name = "mulkcms.lazychat.default-max-results")
  int defaultMaxResults;

  @ResourcePath("benki/posts/postList.html")
  @Inject
  Template postList;

  @Inject SecurityIdentity identity;

  @PersistenceContext EntityManager entityManager;

  @GET
  @Produces(TEXT_HTML)
  public TemplateInstance getIndex(
      @QueryParam("i") @CheckForNull Integer cursor,
      @QueryParam("n") @CheckForNull Integer maxResults) {

    maxResults = maxResults == null ? defaultMaxResults : maxResults;

    var session = entityManager.unwrap(Session.class);
    var q = LazychatMessage.findViewable(session, identity, null, cursor, maxResults);

    return postList
        .data("posts", q.posts)
        .data("pageTitle", "Lazy Chat")
        .data("showBookmarkForm", false)
        .data("showLazychatForm", !identity.isAnonymous())
        .data("hasPreviousPage", q.prevCursor != null)
        .data("hasNextPage", q.nextCursor != null)
        .data("previousCursor", q.prevCursor)
        .data("nextCursor", q.nextCursor)
        .data("pageSize", maxResults);
  }

  @GET
  @Path("~{ownerName}")
  @Produces(TEXT_HTML)
  public TemplateInstance getUserIndex(
      @PathParam("ownerName") String ownerName,
      @QueryParam("i") @CheckForNull Integer cursor,
      @QueryParam("n") @CheckForNull Integer maxResults) {

    maxResults = maxResults == null ? defaultMaxResults : maxResults;

    var owner = User.findByNickname(ownerName);
    var session = entityManager.unwrap(Session.class);
    var q = LazychatMessage.findViewable(session, identity, owner, cursor, maxResults);

    return postList
        .data("posts", q.posts)
        .data("pageTitle", "Lazy Chat")
        .data("showBookmarkForm", false)
        .data("showLazychatForm", !identity.isAnonymous())
        .data("hasPreviousPage", q.prevCursor != null)
        .data("hasNextPage", q.nextCursor != null)
        .data("previousCursor", q.prevCursor)
        .data("nextCursor", q.nextCursor)
        .data("pageSize", maxResults);
  }

  @POST
  @Transactional
  @Authenticated
  public Response postMessage(
      @FormParam("text") String text,
      @FormParam("visibility") @NotNull @Pattern(regexp = "public|semiprivate|private")
          String visibility)
      throws URISyntaxException {

    var userName = identity.getPrincipal().getName();
    var user = User.findByNickname(userName);

    var message = new LazychatMessage();
    message.content = text;
    message.format = "markdown";
    message.owner = user;
    message.date = OffsetDateTime.now();

    if (visibility.equals("public")) {
      Role world = Role.find("from Role r join r.tags tag where tag = 'world'").singleResult();
      message.targets = Set.of(world);
    } else if (visibility.equals("semiprivate")) {
      message.targets = Set.copyOf(user.defaultTargets);
    } else if (!visibility.equals("private")) {
      throw new BadRequestException(String.format("invalid visibility “%s”", visibility));
    }

    message.persistAndFlush();

    return Response.seeOther(new URI("/lazychat")).build();
  }

  @TemplateExtension
  static String humanDateTime(TemporalAccessor x) {
    return humanDateFormatter.format(x);
  }

  @TemplateExtension
  static String htmlDateTime(TemporalAccessor x) {
    return htmlDateFormatter.format(x);
  }
}