feat: add query messages of thread api

cortex-js/src/infrastructure/controllers/threads.controller.ts

@@ -7,14 +7,24 @@ import {
   Param,
   Delete,
   UseInterceptors,
+  HttpCode,
+  Query,
+  DefaultValuePipe,
 } from '@nestjs/common';
 import { ThreadsUsecases } from '@/usecases/threads/threads.usecases';
 import { CreateThreadDto } from '@/infrastructure/dtos/threads/create-thread.dto';
 import { UpdateThreadDto } from '@/infrastructure/dtos/threads/update-thread.dto';
 import { DeleteThreadResponseDto } from '@/infrastructure/dtos/threads/delete-thread.dto';
 import { GetThreadResponseDto } from '@/infrastructure/dtos/threads/get-thread.dto';
-import { ApiOperation, ApiParam, ApiTags, ApiResponse } from '@nestjs/swagger';
+import {
+  ApiOperation,
+  ApiParam,
+  ApiTags,
+  ApiResponse,
+  ApiQuery,
+} from '@nestjs/swagger';
 import { TransformInterceptor } from '../interceptors/transform.interceptor';
+import { ListMessagesResponseDto } from '../dtos/messages/list-message.dto';
 
 @ApiTags('Threads')
 @Controller('threads')
@@ -41,6 +51,74 @@ export class ThreadsController {
     return this.threadsService.findAll();
   }
 
+  @HttpCode(200)
+  @ApiResponse({
+    status: 200,
+    description: 'A list of message objects.',
+    type: ListMessagesResponseDto,
+  })
+  @ApiOperation({
+    summary: 'List messages',
+    description: 'Returns a list of messages for a given thread.',
+  })
+  @ApiParam({
+    name: 'id',
+    required: true,
+    description: 'The ID of the thread the messages belong to.',
+  })
+  @ApiQuery({
+    name: 'limit',
+    type: Number,
+    required: false,
+    description:
+      'A limit on the number of objects to be returned. Limit can range between 1 and 100, and the default is 20.',
+  })
+  @ApiQuery({
+    name: 'order',
+    type: String,
+    required: false,
+    description:
+      'Sort order by the created_at timestamp of the objects. asc for ascending order and desc for descending order.',
+  })
+  @ApiQuery({
+    name: 'after',
+    type: String,
+    required: false,
+    description:
+      'A cursor for use in pagination. after is an object ID that defines your place in the list. For instance, if you make a list request and receive 100 objects, ending with obj_foo, your subsequent call can include after=obj_foo in order to fetch the next page of the list.',
+  })
+  @ApiQuery({
+    name: 'before',
+    type: String,
+    required: false,
+    description:
+      'A cursor for use in pagination. before is an object ID that defines your place in the list. For instance, if you make a list request and receive 100 objects, ending with obj_foo, your subsequent call can include before=obj_foo in order to fetch the previous page of the list.',
+  })
+  @ApiQuery({
+    name: 'run_id',
+    type: String,
+    required: false,
+    description: 'Filter messages by the run ID that generated them.',
+  })
+  @Get(':id/messages')
+  getMessagesOfThread(
+    @Param('id') id: string,
+    @Query('limit', new DefaultValuePipe(20)) limit: number,
+    @Query('order', new DefaultValuePipe('desc')) order: 'asc' | 'desc',
+    @Query('after') after?: string,
+    @Query('before') before?: string,
+    @Query('run_id') runId?: string,
+  ) {
+    return this.threadsService.getMessagesOfThread(
+      id,
+      limit,
+      order,
+      after,
+      before,
+      runId,
+    );
+  }
+
   @ApiResponse({
     status: 200,
     description: 'Ok',

cortex-js/src/infrastructure/dtos/page.dto.ts

@@ -0,0 +1,28 @@
+import { ApiProperty } from '@nestjs/swagger';
+import { IsArray } from 'class-validator';
+
+export class PageDto<T> {
+  @ApiProperty()
+  readonly object: string;
+
+  @IsArray()
+  @ApiProperty({ isArray: true })
+  readonly data: T[];
+
+  @ApiProperty()
+  readonly first_id: string | undefined;
+
+  @ApiProperty()
+  readonly last_id: string | undefined;
+
+  @ApiProperty()
+  readonly has_more: boolean;
+
+  constructor(data: T[], hasMore: boolean, firstId?: string, lastId?: string) {
+    this.object = 'list';
+    this.data = data;
+    this.first_id = firstId;
+    this.last_id = lastId;
+    this.has_more = hasMore;
+  }
+}

cortex-js/src/main.ts

@@ -19,6 +19,7 @@ async function bootstrap() {
 
   app.useGlobalPipes(
     new ValidationPipe({
+      transform: true,
       enableDebugMessages: true,
     }),
   );

cortex-js/src/usecases/threads/threads.usecases.ts

@@ -1,15 +1,19 @@
-import { Inject, Injectable } from '@nestjs/common';
+import { Inject, Injectable, NotFoundException } from '@nestjs/common';
 import { CreateThreadDto } from '@/infrastructure/dtos/threads/create-thread.dto';
 import { UpdateThreadDto } from '@/infrastructure/dtos/threads/update-thread.dto';
 import { ThreadEntity } from '@/infrastructure/entities/thread.entity';
 import { Repository } from 'typeorm';
 import { v4 as uuidv4 } from 'uuid';
+import { MessageEntity } from '@/infrastructure/entities/message.entity';
+import { PageDto } from '@/infrastructure/dtos/page.dto';
 
 @Injectable()
 export class ThreadsUsecases {
   constructor(
     @Inject('THREAD_REPOSITORY')
     private threadRepository: Repository<ThreadEntity>,
+    @Inject('MESSAGE_REPOSITORY')
+    private messageRepository: Repository<MessageEntity>,
   ) {}
 
   async create(createThreadDto: CreateThreadDto): Promise<ThreadEntity> {
@@ -29,6 +33,49 @@ export class ThreadsUsecases {
     return this.threadRepository.find();
   }
 
+  async getMessagesOfThread(
+    id: string,
+    limit: number,
+    order: 'asc' | 'desc',
+    after?: string,
+    before?: string,
+    runId?: string,
+  ) {
+    const thread = await this.findOne(id);
+    if (!thread) {
+      throw new NotFoundException(`Thread with id ${id} not found`);
+    }
+
+    const queryBuilder = this.messageRepository.createQueryBuilder();
+    const normalizedOrder = order === 'asc' ? 'ASC' : 'DESC';
+
+    queryBuilder
+      .where('thread_id = :id', { id })
+      .orderBy('created', normalizedOrder)
+      .take(limit + 1); // Fetch one more record than the limit
+
+    if (after) {
+      queryBuilder.andWhere('id > :after', { after });
+    }
+
+    if (before) {
+      queryBuilder.andWhere('id < :before', { before });
+    }
+
+    const { entities: messages } = await queryBuilder.getRawAndEntities();
+
+    let hasMore = false;
+    if (messages.length > limit) {
+      hasMore = true;
+      messages.pop(); // Remove the extra record
+    }
+
+    const firstId = messages[0]?.id ?? undefined;
+    const lastId = messages[messages.length - 1]?.id ?? undefined;
+
+    return new PageDto(messages, hasMore, firstId, lastId);
+  }
+
   findOne(id: string) {
     return this.threadRepository.findOne({ where: { id } });
   }