juplo.de Git - demos/kafka/chat/blob - src/main/java/de/juplo/kafka/chat/backend/api/ChatBackendController.java

   1 package de.juplo.kafka.chat.backend.api;
   2
   3 import de.juplo.kafka.chat.backend.domain.ChatHome;
   4 import de.juplo.kafka.chat.backend.domain.Chatroom;
   5 import lombok.RequiredArgsConstructor;
   6 import org.springframework.http.MediaType;
   7 import org.springframework.web.bind.annotation.*;
   8 import reactor.core.publisher.Flux;
   9 import reactor.core.publisher.Mono;
  10
  11 import java.time.Clock;
  12 import java.time.LocalDateTime;
  13 import java.util.Collection;
  14 import java.util.UUID;
  15
  16
  17 @RestController
  18 @RequiredArgsConstructor
  19 public class ChatBackendController
  20 {
  21   private final ChatHome chatHome;
  22   private final Clock clock;
  23
  24
  25   @PostMapping("create")
  26   public Chatroom create(@RequestBody String name)
  27   {
  28     return chatHome.createChatroom(name);
  29   }
  30
  31   @GetMapping("list")
  32   public Collection<Chatroom> list()
  33   {
  34     return chatHome.list();
  35   }
  36
  37   @GetMapping("get/{chatroomId}")
  38   public Chatroom get(@PathVariable UUID chatroomId)
  39   {
  40     return chatHome.getChatroom(chatroomId);
  41   }
  42
  43   @PutMapping("put/{chatroomId}/{username}/{messageId}")
  44   public Mono<MessageTo> put(
  45       @PathVariable UUID chatroomId,
  46       @PathVariable String username,
  47       @PathVariable Long messageId,
  48       @RequestBody String text)
  49   {
  50     Chatroom chatroom = chatHome.getChatroom(chatroomId);
  51     return
  52         chatroom
  53             .addMessage(
  54                 messageId,
  55                 LocalDateTime.now(clock),
  56                 username,
  57                 text)
  58             .switchIfEmpty(chatroom.getMessage(username, messageId))
  59             .map(message -> MessageTo.from(message));
  60   }
  61
  62   @GetMapping("get/{chatroomId}/{username}/{messageId}")
  63   public Mono<MessageTo> get(
  64       @PathVariable UUID chatroomId,
  65       @PathVariable String username,
  66       @PathVariable Long messageId)
  67   {
  68     return
  69         chatHome
  70             .getChatroom(chatroomId)
  71             .getMessage(username, messageId)
  72             .map(message -> MessageTo.from(message));
  73   }
  74
  75   @GetMapping(
  76       path = "listen/{chatroomId}",
  77       produces = MediaType.TEXT_EVENT_STREAM_VALUE)
  78   public Flux<MessageTo> listen(@PathVariable UUID chatroomId)
  79   {
  80     return chatHome
  81         .getChatroom(chatroomId)
  82         .listen()
  83         .log()
  84         .map(message -> MessageTo.from(message));
  85   }
  86 }