Initial WhaleTown V2 backend

src/business/cafe_companion/dto/send_cafe_companion_message.dto.ts

@@ -0,0 +1,12 @@
+import { IsString, Length, Matches } from 'class-validator';
+
+export class SendCafeCompanionMessageDto {
+  @IsString({ message: '会话ID必须是字符串' })
+  @Length(1, 120, { message: '会话ID长度需在1-120字符之间' })
+  @Matches(/^[A-Za-z0-9_:-]+$/, { message: '会话ID格式不正确' })
+  session_id!: string;
+
+  @IsString({ message: '消息内容必须是字符串' })
+  @Length(1, 1200, { message: '消息内容长度需在1-1200字符之间' })
+  content!: string;
+}