WebAPISignalRChat/Backend/Diligent.WebAPI.Host/Controllers/ChatController.cs

using AutoMapper;
using Diligent.WebAPI.Business.Services;
using Diligent.WebAPI.Data.Entities;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;

namespace Diligent.WebAPI.Host.Controllers
{
    [ApiVersion("1.0")]
    [ApiController]
    [Route("v{version:apiVersion}/[controller]")]
    public class ChatController : ControllerBase
    {
        private readonly RoomService _roomService;

        public ChatController(RoomService roomService)
        {
            _roomService = roomService;
        }

        [Authorize(Roles = "Customer,Support")]
        [HttpGet("rooms-with-filtered-messages")]
        public async Task<ActionResult<List<Room>>> GetAllRoomsWithFilteredMessages(string customerId)
        {
            var rooms = await _roomService.GetRoomsAsync();
            foreach (var room in rooms)
            {

                List<Message> msg = new();
                var customer = room.Customers.Where(c => c.CustomerId == customerId).FirstOrDefault();

                if (customer is not null)
                {
                    foreach (var message in room.Messages)
                    {
                        if (message.CreatedAtUtc >= customer.DateOfEnteringRoom)
                            msg.Add(message);
                    }
                    room.Messages = msg;
                }
                else
                {
                    room.Messages = new List<Message>();
                }
            }
            return rooms;
        }

        [HttpPost]
        [Authorize(Roles = "Customer")]
        public async Task<IActionResult> CreateChat(Room room)
        {
            if(room == null)
            {
                throw new BadHttpRequestException("Object cannot be null");
            }

            await _roomService.CreateRoomAsync(room);

            return Ok(room);
        }
    }
}