entities for messages

server/src/main/java/com/usatiuk/tjv/y/server/entity/Chat.java

@@ -0,0 +1,34 @@
+package com.usatiuk.tjv.y.server.entity;
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import lombok.experimental.Accessors;
+
+import java.util.ArrayList;
+import java.util.Collection;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@ToString
+@Accessors(chain = true)
+public class Chat implements EntityWithId<Long> {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @NotBlank
+    private String name;
+
+    @OneToMany(mappedBy = "chat")
+    private Collection<Message> messages = new ArrayList<>();
+
+    @ManyToMany(mappedBy = "chats")
+    private Collection<Person> users;
+
+}

server/src/main/java/com/usatiuk/tjv/y/server/entity/Message.java

@@ -0,0 +1,31 @@
+package com.usatiuk.tjv.y.server.entity;
+
+import jakarta.persistence.*;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import lombok.Setter;
+import lombok.ToString;
+import lombok.experimental.Accessors;
+
+@Entity
+@Getter
+@Setter
+@NoArgsConstructor
+@ToString
+@Accessors(chain = true)
+public class Message implements EntityWithId<Long> {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @ManyToOne
+    private Chat chat;
+    
+    @ManyToOne
+    private Person author;
+
+    @Lob
+    @NotBlank
+    private String contents;
+}

server/src/main/java/com/usatiuk/tjv/y/server/entity/Person.java

@@ -37,6 +37,9 @@ public class Person implements EntityWithId<String> {
     @OneToMany(mappedBy = "author")
     private Collection<Post> posts = new ArrayList<>();
 
+    @OneToMany(mappedBy = "author")
+    private Collection<Message> messages = new ArrayList<>();
+
     @ManyToMany
     @JoinTable(name = "user_follows",
             joinColumns = @JoinColumn(name = "follower"),
@@ -46,6 +49,12 @@ public class Person implements EntityWithId<String> {
     @ManyToMany(mappedBy = "following")
     private Collection<Person> followers;
 
+    @ManyToMany
+    @JoinTable(name = "user_chat",
+            joinColumns = @JoinColumn(name = "user"),
+            inverseJoinColumns = @JoinColumn(name = "chat"))
+    private Collection<Chat> chats;
+
     @Override
     public String getId() {
         return uuid;