package de.juplo.kafka.chat.backend.api;
-import de.juplo.kafka.chat.backend.domain.Chatroom;
-import de.juplo.kafka.chat.backend.domain.ChatroomFactory;
+import de.juplo.kafka.chat.backend.domain.ChatHome;
+import de.juplo.kafka.chat.backend.domain.ChatRoom;
+import de.juplo.kafka.chat.backend.persistence.StorageStrategy;
import lombok.RequiredArgsConstructor;
-import org.springframework.http.MediaType;
+import org.springframework.http.codec.ServerSentEvent;
import org.springframework.web.bind.annotation.*;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
-import java.time.Clock;
-import java.time.LocalDateTime;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
import java.util.UUID;
@RequiredArgsConstructor
public class ChatBackendController
{
- private final Map<UUID, Chatroom> chatrooms = new HashMap<>();
- private final ChatroomFactory factory;
- private final Clock clock;
+ private final ChatHome chatHome;
+ private final StorageStrategy storageStrategy;
@PostMapping("create")
- public Chatroom create(@RequestBody String name)
+ public Mono<ChatRoomTo> create(@RequestBody String name)
{
- Chatroom chatroom = factory.createChatroom(UUID.randomUUID(), name);
- chatrooms.put(chatroom.getId(), chatroom);
- return chatroom;
+ return chatHome.createChatroom(name).map(ChatRoomTo::from);
}
@GetMapping("list")
- public Collection<Chatroom> list()
+ public Flux<ChatRoomTo> list()
{
- return chatrooms.values();
+ return chatHome.getChatRooms().map(chatroom -> ChatRoomTo.from(chatroom));
+ }
+
+ @GetMapping("list/{chatroomId}")
+ public Flux<MessageTo> list(@PathVariable UUID chatroomId)
+ {
+ return chatHome
+ .getChatRoom(chatroomId)
+ .flatMapMany(chatroom -> chatroom
+ .getMessages()
+ .map(MessageTo::from));
}
@GetMapping("get/{chatroomId}")
- public Chatroom get(@PathVariable UUID chatroomId)
+ public Mono<ChatRoomTo> get(@PathVariable UUID chatroomId)
{
- return chatrooms.get(chatroomId);
+ return chatHome.getChatRoom(chatroomId).map(chatroom -> ChatRoomTo.from(chatroom));
}
@PutMapping("put/{chatroomId}/{username}/{messageId}")
@PathVariable Long messageId,
@RequestBody String text)
{
- Chatroom chatroom = chatrooms.get(chatroomId);
+ return
+ chatHome
+ .getChatRoom(chatroomId)
+ .flatMap(chatroom -> put(chatroom, username, messageId, text));
+ }
+
+ public Mono<MessageTo> put(
+ ChatRoom chatroom,
+ String username,
+ Long messageId,
+ String text)
+ {
return
chatroom
.addMessage(
messageId,
- LocalDateTime.now(clock),
username,
text)
- .switchIfEmpty(chatroom.getMessage(username, messageId))
.map(message -> MessageTo.from(message));
}
@PathVariable Long messageId)
{
return
- chatrooms
- .get(chatroomId)
+ chatHome
+ .getChatRoom(chatroomId)
+ .flatMap(chatroom -> get(chatroom, username, messageId));
+ }
+
+ private Mono<MessageTo> get(
+ ChatRoom chatroom,
+ String username,
+ Long messageId)
+ {
+ return
+ chatroom
.getMessage(username, messageId)
.map(message -> MessageTo.from(message));
}
- @GetMapping(
- path = "listen/{chatroomId}",
- produces = MediaType.TEXT_EVENT_STREAM_VALUE)
- public Flux<MessageTo> listen(@PathVariable UUID chatroomId)
+ @GetMapping(path = "listen/{chatroomId}")
+ public Flux<ServerSentEvent<MessageTo>> listen(@PathVariable UUID chatroomId)
{
- return chatrooms
- .get(chatroomId)
+ return chatHome
+ .getChatRoom(chatroomId)
+ .flatMapMany(chatroom -> listen(chatroom));
+ }
+
+ private Flux<ServerSentEvent<MessageTo>> listen(ChatRoom chatroom)
+ {
+ return chatroom
.listen()
.log()
- .map(message -> MessageTo.from(message));
+ .map(message -> MessageTo.from(message))
+ .map(messageTo ->
+ ServerSentEvent
+ .builder(messageTo)
+ .id(messageTo.getSerial().toString())
+ .event("message")
+ .build());
+ }
+
+ @PostMapping("/store")
+ public void store()
+ {
+ storageStrategy.write(chatHome.getChatRooms());
}
}