adding change Owner -only for the owner-

backend/code/src/rooms/dto/change-owner.dto.ts

@@ -0,0 +1,16 @@
+// import { ApiProperty } from '@nestjs/swagger';
+import {
+  IsNotEmpty,
+  IsString,
+} from 'class-validator';
+
+export class ChangeOwnerDto{
+    // @ApiProperty()
+    @IsNotEmpty()
+    @IsString()
+    roomId: string;
+    @IsNotEmpty()
+    @IsString()
+    NewOwnerId: string;
+
+}

backend/code/src/rooms/rooms.controller.ts

@@ -14,6 +14,7 @@ import { JoinRoomDto } from './dto/join-room.dto';
 import { LeaveRoomDto } from './dto/leave-room.dto';
 import { DeleteRoomDto } from './dto/delete-room.dto';
 import { UpdateRoomDto } from './dto/update-room.dto';
+import { ChangeOwnerDto } from './dto/change-owner.dto';
 import { ApiCookieAuth, ApiTags } from '@nestjs/swagger';
 
 @ApiTags('rooms')
@@ -70,4 +71,13 @@ export class RoomsController {
   ) {
     return await this.roomsService.updateRoom(roomdata, userId);
   }
+  @Post('changeOwner')
+  @HttpCode(HttpStatus.OK)
+  @UseGuards(AtGuard)
+  async changeOwner(
+    @Body() roomdata: ChangeOwnerDto,
+    @GetCurrentUser('userId') userId: string,
+    ){
+    return await this.roomsService.changeOwner(roomdata, userId);
+  }
 }

backend/code/src/rooms/rooms.service.ts

@@ -9,6 +9,7 @@ import { PrismaService } from 'src/prisma/prisma.service';
 import { JoinRoomDto } from './dto/join-room.dto';
 import { LeaveRoomDto } from './dto/leave-room.dto';
 import { DeleteRoomDto } from './dto/delete-room.dto';
+import { ChangeOwnerDto } from './dto/change-owner.dto';
 import * as bcrypt from 'bcrypt';
 import { UpdateRoomDto } from './dto/update-room.dto';
 
@@ -123,4 +124,18 @@ export class RoomsService {
       data: roomData,
     });
   }
+  async changeOwner(roomData: ChangeOwnerDto, userId: string) {
+    const { ownerId } = await this.prisma.room.findUnique({
+      where: { id: roomData.roomId },
+      select: { ownerId: true },
+    });
+    if (ownerId !== userId)
+      throw new UnauthorizedException('You are not the owner of this room');
+    const updateRoomOwner = await this.prisma.room.update({
+      where: { id: roomData.roomId },
+      data: { owner: { connect: { userId: roomData.NewOwnerId } } }
+    });
+    return { message: 'change roomOwner successfully' };
+  } 
+
 }