1 package de.juplo.kafka.chat.backend.api;
3 import de.juplo.kafka.chat.backend.domain.ChatHome;
4 import de.juplo.kafka.chat.backend.domain.Chatroom;
5 import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
6 import lombok.RequiredArgsConstructor;
7 import org.springframework.http.MediaType;
8 import org.springframework.http.codec.ServerSentEvent;
9 import org.springframework.web.bind.annotation.*;
10 import reactor.core.publisher.Flux;
11 import reactor.core.publisher.Mono;
13 import java.time.Clock;
14 import java.time.LocalDateTime;
15 import java.util.Optional;
16 import java.util.UUID;
17 import java.util.stream.Stream;
21 @RequiredArgsConstructor
22 public class ChatBackendController
24 private final ChatHome chatHome;
25 private final Clock clock;
26 private final StorageStrategy storageStrategy;
29 @PostMapping("create")
30 public ChatroomTo create(@RequestBody String name)
32 return ChatroomTo.from(chatHome.createChatroom(name));
36 public Stream<ChatroomTo> list()
38 return chatHome.list().map(chatroom -> ChatroomTo.from(chatroom));
41 @GetMapping("list/{chatroomId}")
42 public Flux<MessageTo> list(@PathVariable UUID chatroomId)
45 .getChatroom(chatroomId)
46 .map(chatroom -> chatroom
48 .map(MessageTo::from))
52 @GetMapping("get/{chatroomId}")
53 public Optional<ChatroomTo> get(@PathVariable UUID chatroomId)
55 return chatHome.getChatroom(chatroomId).map(chatroom -> ChatroomTo.from(chatroom));
58 @PutMapping("put/{chatroomId}/{username}/{messageId}")
59 public Mono<MessageTo> put(
60 @PathVariable UUID chatroomId,
61 @PathVariable String username,
62 @PathVariable Long messageId,
63 @RequestBody String text)
67 .getChatroom(chatroomId)
68 .map(chatroom -> put(chatroom, username, messageId, text))
69 .orElseThrow(() -> new UnknownChatroomException(chatroomId));
72 public Mono<MessageTo> put(
82 LocalDateTime.now(clock),
85 .switchIfEmpty(chatroom.getMessage(username, messageId))
86 .map(message -> MessageTo.from(message));
89 @GetMapping("get/{chatroomId}/{username}/{messageId}")
90 public Mono<MessageTo> get(
91 @PathVariable UUID chatroomId,
92 @PathVariable String username,
93 @PathVariable Long messageId)
97 .getChatroom(chatroomId)
98 .map(chatroom -> get(chatroom, username, messageId))
99 .orElseThrow(() -> new UnknownChatroomException(chatroomId));
102 private Mono<MessageTo> get(
109 .getMessage(username, messageId)
110 .map(message -> MessageTo.from(message));
113 @GetMapping(path = "listen/{chatroomId}")
114 public Flux<ServerSentEvent<MessageTo>> listen(@PathVariable UUID chatroomId)
117 .getChatroom(chatroomId)
118 .map(chatroom -> listen(chatroom))
119 .orElseThrow(() -> new UnknownChatroomException(chatroomId));
122 private Flux<ServerSentEvent<MessageTo>> listen(Chatroom chatroom)
127 .map(message -> MessageTo.from(message))
131 .id(messageTo.getSerial().toString())
136 @PostMapping("/store")
139 storageStrategy.writeChatrooms(Flux.fromStream(chatHome.list()));