added more services and used table referencing

src/chat/chat.gateway.ts

@@ -34,7 +34,7 @@ export class ChatGateway
 
   private readonly logger = new Logger(ChatGateway.name);
 
-  private users = new Map<string, { userId: string; username: string }>(); // {socketId:{userId:'12rt3',username:'suman'}}
+  // private users = new Map<string, { userId: string; username: string }>(); // {socketId:{userId:'12rt3',username:'suman'}} // redundant
 
   afterInit(server: Server) {
     this.logger.log('/chat namespace initialized');
@@ -61,11 +61,6 @@ export class ChatGateway
         id: payload.sub, // mongo id
         username: payload.username,
       };
-      // in memeory
-      this.users.set(client.id, {
-        userId: payload.sub,
-        username: payload.username,
-      });
       
       this.logger.log(`[+] Authenticated: ${payload.username} (${client.id})`);
       // tell the new client their own info
@@ -89,9 +84,8 @@ export class ChatGateway
   }
 
   handleDisconnect(client: Socket) {
-    const user = this.users.get(client.id);
+    const user=client.data?.user
     if (user) {
-      this.users.delete(client.id);
       this.logger.log(`[-] Disconnected: ${user.username} (${client.id})`);
       this.server.emit('serverNotice', `[-] ${user.username} left`);
     }
@@ -100,13 +94,13 @@ export class ChatGateway
   @UseGuards(WsJwtGuard)
   @SubscribeMessage('joinRoom')
   handleJoinRoom(
-    @MessageBody() body: JoinLeaveRoomDto, //roomId
+    @MessageBody() body: JoinLeaveRoomDto, //roomId(conversation id)
     @ConnectedSocket() client: Socket,
   ) {
     // extract user
     const username = client.data.user.username;
 
-    // join user in the room(front-end will provide roomId(standard appraoch))
+    // join user in the room
     client.join(body.roomId);
 
     // tell the joiner he successfully joined
@@ -170,7 +164,6 @@ export class ChatGateway
     @MessageBody() body: { targetUserId: string },
     @ConnectedSocket() client: Socket,
   ) {
-    
     return this.chatService.handleStartP2P(body.targetUserId, client, this.server);
   }
 }

src/chat/dto/chat-message.dto.ts

@@ -1,9 +0,0 @@
-import { IsNotEmpty, IsString, MaxLength, MinLength } from 'class-validator';
-
-export class ChatMessageDto {
-  @IsString({ message: 'text must be a string' })
-  @IsNotEmpty({ message: 'text cannot be empty' })
-  @MinLength(1, { message: 'Message is too short' })
-  @MaxLength(500, { message: 'Message cannot exceed 500 characters' })
-  text!: string;
-}

src/conversations/conversations.controller.ts

@@ -1,37 +1,47 @@
-import { Controller, Get, Post, Body, Patch, Param, Delete } from '@nestjs/common';
+import {
+  Controller,
+  Get,
+  Post,
+  Body,
+  Patch,
+  Param,
+  Delete,
+} from '@nestjs/common';
 import { ConversationsService } from './conversations.service';
 import { CreateConversationDto } from './dto/create-conversation.dto';
 import { UpdateConversationDto } from './dto/update-conversation.dto';
 import { ApiOperation } from '@nestjs/swagger';
+import path from 'path';
 
 @Controller('conversations')
 export class ConversationsController {
   constructor(private readonly conversationsService: ConversationsService) {}
 
-  @ApiOperation({ summary: 'Create a conversation'})
+  @ApiOperation({ summary: 'Create a conversation' })
   @Post()
   async create(@Body() createConversationDto: CreateConversationDto) {
     return await this.conversationsService.create(createConversationDto);
   }
 
-  @ApiOperation({ summary: 'Get all conversations' })
-  @Get()
-  async findAll() {
-    return await this.conversationsService.findAll();
+  @ApiOperation({ summary: 'Get all conversations where the user is in' })
+  @Get(':userId')
+  async findAll(@Param('userId') userId: string) {
+    return await this.conversationsService.findAll(userId);
   }
 
-  // @Get(':id')
-  // findOne(@Param('id') id: string) {
-  //   return this.conversationsService.findOne(+id);
-  // }
-
-  @Patch(':id')
-  update(@Param('id') id: string, @Body() updateConversationDto: UpdateConversationDto) {
-    return this.conversationsService.update(id, updateConversationDto);
+  @Patch(':convId/add-participant')
+  async addParticipant(
+    @Param('convId') convId: string,
+    @Body('userId') userId: string,
+  ) {
+    return await this.conversationsService.addParticipant(convId, userId);
   }
 
-  @Delete(':id')
-  remove(@Param('id') id: string) {
-    return this.conversationsService.remove(+id);
+  @Patch(':convId/remove-participant')
+  async removeParticipant(
+    @Param('convId') convId: string,
+    @Body('userId') userId: string,
+  ) {
+    return this.conversationsService.removeParticipant(convId, userId);
   }
 }

src/conversations/conversations.service.ts

@@ -1,45 +1,92 @@
-import { Injectable } from '@nestjs/common';
+import {
+  ConflictException,
+  Injectable,
+  NotFoundException,
+} from '@nestjs/common';
 import { CreateConversationDto } from './dto/create-conversation.dto';
 import { UpdateConversationDto } from './dto/update-conversation.dto';
-import { Conversation, ConversationDocument, ConversationType } from './schemas/conversation.schema';
+import {
+  Conversation,
+  ConversationDocument,
+  ConversationType,
+} from './schemas/conversation.schema';
 import { InjectModel } from '@nestjs/mongoose';
 import { Model } from 'mongoose';
+import { UserDocument } from 'src/users/schemas/user.schema';
+
+type PopulatedConversation = Omit<ConversationDocument, 'participants'> & {
+  participants: UserDocument[];
+};
 
 @Injectable()
 export class ConversationsService {
-
   constructor(
-    @InjectModel(Conversation.name) private conversationModel: Model<ConversationDocument>,
-
+    @InjectModel(Conversation.name)
+    private conversationModel: Model<ConversationDocument>,
   ) {}
-  async create(createConversationDto: CreateConversationDto):Promise<ConversationDocument> {
-    return await this.conversationModel.create(createConversationDto)
+  async create(
+    createConversationDto: CreateConversationDto,
+  ): Promise<ConversationDocument> {
+    return await this.conversationModel.create(createConversationDto);
   }
 
-  async findAll():Promise<ConversationDocument[]> {
-    return await this.conversationModel.find().exec()
+  async findAll(userId: string): Promise<PopulatedConversation[]> {
+    return await this.conversationModel
+      .find({ participants: userId })
+      .populate<{ participants: UserDocument[] }>('participants', 'name')
+      .exec();
   }
 
-  async findP2p(senderId:string, targetUserId:string){
+  async findP2p(
+    senderId: string,
+    targetUserId: string,
+  ): Promise<ConversationDocument | null> {
     return await this.conversationModel.findOne({
       type: ConversationType.P2P,
       participants: { $all: [senderId, targetUserId], $size: 2 },
     });
   }
 
-  // findOne(id: number) {
-  //   return `This action returns a #${id} conversation`;
-  // }
-
-  async update(id: string, updateConversationDto: UpdateConversationDto) {
-    await this.conversationModel.findByIdAndUpdate(
-      {_id:id},
-      updateConversationDto,
-      {new:true}
-    )
+  async addParticipant(
+    convId: string,
+    userId: string,
+  ): Promise<ConversationDocument | null> {
+    const conv = await this.conversationModel.findById(convId);
+    if (!conv) {
+      throw new NotFoundException('Conversation not found');
+    }
+    // prevent modifying p2p chat
+    if (conv.type === 'p2p') {
+      throw new ConflictException('Can not add users to P2P chat');
     }
 
-  remove(id: number) {
-    return `This action removes a #${id} conversation`;
+    return await this.conversationModel.findByIdAndUpdate(
+      convId,
+      {
+        $addToSet: { participants: userId }, // prevent duplicate addition
+      },
+      { new: true },
+    );
+  }
+
+  async removeParticipant(
+    conversationId: string,
+    userId: string,
+  ): Promise<ConversationDocument | null> {
+    const convo = await this.conversationModel.findById(conversationId);
+
+    if (!convo) throw new NotFoundException('Conversation not found');
+
+    if (convo.type === 'p2p') {
+      throw new ConflictException('Can not remove users from P2P chat');
+    }
+
+    return await this.conversationModel.findByIdAndUpdate(
+      conversationId,
+      {
+        $pull: { participants: userId },
+      },
+      { new: true },
+    );
   }
 }

src/conversations/schemas/conversation.schema.ts

@@ -1,5 +1,5 @@
 import { Prop, Schema, SchemaFactory } from "@nestjs/mongoose";
-import { Document } from "mongoose";
+import { Document, Types } from "mongoose";
 
 export type ConversationDocument = Conversation & Document;
 export enum ConversationType{
@@ -16,13 +16,13 @@ export class Conversation {
     })
     type!:ConversationType
 
-    @Prop({type:[String], required:true})
-    participants!:string[]
+    @Prop({type:[Types.ObjectId], ref:'User',required:true})
+    participants!:Types.ObjectId[]
 
     @Prop({required:false,default:null})
     name?:string  // for p2p no name
 
-    createdAt!:Date  // no prop
+    createdAt!:Date  // no prop decorator
 }
 
 export const ConversationSchema = SchemaFactory.createForClass(Conversation);

src/messages/messages.controller.ts

@@ -1,34 +1,16 @@
 import { Controller, Get, Post, Body, Patch, Param, Delete } from '@nestjs/common';
 import { MessagesService } from './messages.service';
-import { CreateMessageDto } from './dto/create-message.dto';
-import { UpdateMessageDto } from './dto/update-message.dto';
 
 @Controller('messages')
 export class MessagesController {
   constructor(private readonly messagesService: MessagesService) {}
 
-  @Post()
-  create(@Body() createMessageDto: CreateMessageDto) {
-    return this.messagesService.create(createMessageDto);
+  
+  @Get(':convId')
+  async findAll(@Param('convId') conId:string) {
+    return await this.messagesService.findAll(conId);
   }
 
-  @Get()
-  findAll() {
-    return this.messagesService.findAll();
-  }
   
-  @Get(':id')
-  findOne(@Param('id') id: string) {
-    return this.messagesService.findOne(+id);
-  }
   
-  @Patch(':id')
-  update(@Param('id') id: string, @Body() updateMessageDto: UpdateMessageDto) {
-    return this.messagesService.update(+id, updateMessageDto);
-  }
-
-  @Delete(':id')
-  remove(@Param('id') id: string) {
-    return this.messagesService.remove(+id);
-  }
 }

src/messages/messages.service.ts

@@ -4,6 +4,11 @@ import { UpdateMessageDto } from './dto/update-message.dto';
 import { InjectModel } from '@nestjs/mongoose';
 import { Message, MessageDocument } from './schemas/message.schema';
 import { Model } from 'mongoose';
+import { UserDocument } from 'src/users/schemas/user.schema';
+
+type PopulatedMessage = Omit<MessageDocument, 'senderId'> & {
+  senderId: UserDocument;
+};
 
 @Injectable()
 export class MessagesService {
@@ -14,19 +19,10 @@ export class MessagesService {
     return await this.MessageModel.create(createMessageDto);
   }
 
-  findAll() {
-    return `This action returns all messages`;
-  }
-
-  findOne(id: number) {
-    return `This action returns a #${id} message`;
-  }
-
-  update(id: number, updateMessageDto: UpdateMessageDto) {
-    return `This action updates a #${id} message`;
-  }
-
-  remove(id: number) {
-    return `This action removes a #${id} message`;
+  async findAll(convId: string): Promise<PopulatedMessage[]> {
+    return await this.MessageModel.find({ conversationId: convId })
+      .populate<{ senderId: UserDocument }>('senderId', 'name')
+      .sort({ createdAt: 1 })
+      .exec();
   }
 }

src/messages/schemas/message.schema.ts

@@ -1,21 +1,21 @@
 import { Prop, Schema, SchemaFactory } from '@nestjs/mongoose';
-import { Document } from 'mongoose';
+import { Document, Types } from 'mongoose';
 
 export type MessageDocument = Message & Document;
 
 @Schema({ timestamps: true })
 export class Message {
-  @Prop({ required: true })
-  conversationId!: string;
+  @Prop({ type: Types.ObjectId, ref: 'Conversation', required: true })
+  conversationId!: Types.ObjectId;
 
-  @Prop({ required: true })
-  senderId!: string;
+  @Prop({ type: Types.ObjectId, ref: 'User', required: true })
+  senderId!: Types.ObjectId; //we can pass string
 
   @Prop({ required: false })
   text!: string;
 
   // no prop
-  createdAt!:Date
+  createdAt!: Date;
 }
 
 export const MessageSchema = SchemaFactory.createForClass(Message);