From 7397955b4b8b752d0ce0a40ce74caf3e0bb42e15 Mon Sep 17 00:00:00 2001
From: Kai Moritz <kai@juplo.de>
Date: Mon, 9 Jan 2023 23:21:50 +0100
Subject: [PATCH] WIP

---
 .../persistence/storage/mongodb/ChatRoomTo.java    |  8 ++++++--
 .../persistence/storage/mongodb/MessageTo.java     | 14 +++++++++++---
 2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/ChatRoomTo.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/ChatRoomTo.java
index da33a5bf..701998ef 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/ChatRoomTo.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/ChatRoomTo.java
@@ -2,6 +2,8 @@ package de.juplo.kafka.chat.backend.persistence.storage.mongodb;
 
 import de.juplo.kafka.chat.backend.domain.ChatRoom;
 import lombok.*;
+import org.springframework.data.annotation.Id;
+import org.springframework.data.mongodb.core.mapping.DBRef;
 
 import java.util.List;
 import java.util.UUID;
@@ -15,15 +17,17 @@ import java.util.UUID;
 @ToString(of = { "id", "name" })
 public class ChatRoomTo
 {
-  private UUID id;
+  @Id
+  private String id;
   private String name;
+  @DBRef
   private List<MessageTo> messages;
 
 
   public static ChatRoomTo from(ChatRoom chatroom)
   {
     return new ChatRoomTo(
-        chatroom.getId(),
+        chatroom.getId().toString(),
         chatroom.getName(),
         chatroom
             .getMessages()
diff --git a/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/MessageTo.java b/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/MessageTo.java
index 7af18457..1eef2739 100644
--- a/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/MessageTo.java
+++ b/src/main/java/de/juplo/kafka/chat/backend/persistence/storage/mongodb/MessageTo.java
@@ -4,6 +4,9 @@ import de.juplo.kafka.chat.backend.domain.Message;
 import lombok.*;
 
 import java.time.LocalDateTime;
+import java.util.UUID;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 
 @AllArgsConstructor
@@ -14,15 +17,20 @@ import java.time.LocalDateTime;
 @ToString(of = { "user", "id" })
 class MessageTo
 {
-  private Long id;
+  final static Pattern SPLIT_ID = Pattern.compile("^([a-z-]+)--([0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12})$");
+  private String id;
   private Long serial;
   private LocalDateTime time;
-  private String user;
   private String text;
 
   Message toMessage()
   {
-    return new Message(Message.MessageKey.of(user, id), serial, time, text);
+    Matcher matcher = SPLIT_ID.matcher(id);
+    if (!matcher.matches())
+      throw new RuntimeException("MessageTo with invalid ID: " + id);
+    UUID uuid = UUID.fromString(matcher.group(2));
+    String user = matcher.group(1);
+    return new Message(Message.MessageKey.of(user, uuid), serial, time, text);
   }
 
   static MessageTo from(Message message)
-- 
2.20.1