chat implemented

backend/Application/Endpoints/Chats/ChatHandler.cs

@@ -0,0 +1,150 @@
+using Application.Services.Database;
+using Application.Services.Database.MongoDB;
+using Core.Entities;
+
+namespace Application.Endpoints.Chats;
+
+public class ChatHandler
+{
+    private readonly IChatMongoDbService _chatMongoDbService;
+    private readonly IPatientRepository _patientRepository;
+    private readonly IDoctorRepository _doctorRepository;
+
+    public ChatHandler(IChatMongoDbService chatMongoDbService, IPatientRepository patientRepository,
+        IDoctorRepository doctorRepository)
+    {
+        _chatMongoDbService = chatMongoDbService;
+        _patientRepository = patientRepository;
+        _doctorRepository = doctorRepository;
+    }
+
+    public async Task<BaseResponse> HandleSendMessage(SendMessageDto sendMessageDto)
+    {
+        var validation = new SendMessageValidator();
+        var validationResult = await validation.ValidateAsync(sendMessageDto);
+
+        if (!validationResult.IsValid)
+        {
+            var firstError = validationResult.Errors.FirstOrDefault();
+            var errorCode = int.TryParse(firstError.ErrorCode, out var code) ? code : -1;
+            var errorMessage = firstError.ErrorMessage;
+
+            return new BaseResponse
+            {
+                StatusCode = errorCode,
+                Message = errorMessage,
+                Data = null
+            };
+        }
+
+        if (!await CheckForUsersExistence(sendMessageDto.Sender, sendMessageDto.Receiver))
+        {
+            return new BaseResponse
+            {
+                StatusCode = HttpStatusCodes.BadRequest,
+                Message = "Users can't be found in the system.",
+                Data = null
+            };
+        }
+
+        var chatId = ChatIdentifier.GenerateChatId(sendMessageDto.Sender, sendMessageDto.Receiver);
+        
+        var criteria = new List<(string, string)>();
+        criteria.Add(("_id", chatId));
+
+        var documents = await _chatMongoDbService.FindAsync<Chat>(criteria);
+        if (!documents.Any())
+        {
+            return new BaseResponse()
+            {
+                StatusCode = HttpStatusCodes.NotFound,
+                Message = "Access to medical history not found.",
+                Data = null
+            };
+        }
+
+        var chat = documents[0].Messages;
+        chat.Add(new Message(sendMessageDto.Sender, sendMessageDto.Message));
+
+        var newChat = new Chat();
+        newChat.SetId(chatId);
+        newChat.SetMessages(chat);
+
+        await _chatMongoDbService.ModifyAsync("_id", chatId, newChat);
+        
+        return new BaseResponse
+        {
+            StatusCode = HttpStatusCodes.NoContent,
+            Message = null,
+            Data = null
+        };
+    }
+
+    public async Task<BaseResponse> HandleGetConversation(GetConversationDto getConversationDto)
+    {
+        var validation = new GetConversationValidator();
+        var validationResult = await validation.ValidateAsync(getConversationDto);
+
+        if (!validationResult.IsValid)
+        {
+            var firstError = validationResult.Errors.FirstOrDefault();
+            var errorCode = int.TryParse(firstError.ErrorCode, out var code) ? code : -1;
+            var errorMessage = firstError.ErrorMessage;
+
+            return new BaseResponse
+            {
+                StatusCode = errorCode,
+                Message = errorMessage,
+                Data = null
+            };
+        }
+
+        if (!await CheckForUsersExistence(getConversationDto.IdUser1, getConversationDto.IdUser2))
+        {
+            return new BaseResponse
+            {
+                StatusCode = HttpStatusCodes.BadRequest,
+                Message = "Users can't be found in the system.",
+                Data = null
+            };
+        }
+
+        var chatId = ChatIdentifier.GenerateChatId(getConversationDto.IdUser1, getConversationDto.IdUser2);
+        
+        var criteria = new List<(string, string)>();
+        criteria.Add(("_id", chatId));
+        
+        Chat? chat = null;
+
+        var documents = await _chatMongoDbService.FindAsync<Chat>(criteria);
+        if (!documents.Any())
+        {
+            chat = new Chat();
+            chat.SetId(chatId);
+
+            await _chatMongoDbService.AddAsync(chat);
+        }
+        else
+        {
+            chat = documents[0];
+        }
+        
+        return new BaseResponse
+        {
+            StatusCode = HttpStatusCodes.OK,
+            Message = "Fetching messages.",
+            Data = chat
+        };
+    }
+
+    private async Task<bool> CheckForUsersExistence(Guid idUser1, Guid idUser2)
+    {
+        var firstCheck = await _patientRepository.GetByIdAsync(idUser1) != null &&
+                         await _doctorRepository.GetByIdAsync(idUser2) != null;
+        
+        var secondCheck = await _patientRepository.GetByIdAsync(idUser2) != null &&
+                          await _doctorRepository.GetByIdAsync(idUser1) != null;
+
+        return firstCheck || secondCheck;
+    }
+}

backend/Application/Endpoints/Chats/ChatIdentifier.cs

@@ -0,0 +1,18 @@
+namespace Application.Endpoints.Chats;
+
+public class ChatIdentifier
+{
+    public static string GenerateChatId(Guid id1, Guid id2)
+    {
+        // Convert GUIDs to strings
+        string strId1 = id1.ToString();
+        string strId2 = id2.ToString();
+
+        // Sort the GUID strings
+        string firstId = strId1.CompareTo(strId2) < 0 ? strId1 : strId2;
+        string secondId = strId1.CompareTo(strId2) < 0 ? strId2 : strId1;
+
+        // Combine them to get a symmetric string
+        return firstId + "-" + secondId;
+    }
+}

backend/Application/Endpoints/Chats/GetConversationDto.cs

@@ -0,0 +1,7 @@
+namespace Application.Endpoints.Chats;
+
+public class GetConversationDto
+{
+    public Guid IdUser1 { get; set; }
+    public Guid IdUser2 { get; set; }
+}

backend/Application/Endpoints/Chats/GetConversationValidator.cs

@@ -0,0 +1,15 @@
+using FluentValidation;
+
+namespace Application.Endpoints.Chats;
+
+public class GetConversationValidator : AbstractValidator<GetConversationDto>
+{
+    public GetConversationValidator()
+    {
+        RuleFor(x => x.IdUser1)
+            .NotEmpty().WithMessage("IdUser1 is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+
+        RuleFor(x => x.IdUser2)
+            .NotEmpty().WithMessage("IdUser2 is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+    }
+}

backend/Application/Endpoints/Chats/SendMessageDto.cs

@@ -0,0 +1,8 @@
+namespace Application.Endpoints.Chats;
+
+public class SendMessageDto
+{
+    public Guid Sender { get; set; }
+    public Guid Receiver { get; set; }
+    public string Message { get; set; }
+}

backend/Application/Endpoints/Chats/SendMessageValidator.cs

@@ -0,0 +1,18 @@
+using FluentValidation;
+
+namespace Application.Endpoints.Chats;
+
+public class SendMessageValidator : AbstractValidator<SendMessageDto>
+{
+    public SendMessageValidator()
+    {
+        RuleFor(x => x.Sender)
+            .NotEmpty().WithMessage("Sender Id is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+
+        RuleFor(x => x.Receiver)
+            .NotEmpty().WithMessage("Receiver Id is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+        
+        RuleFor(x => x.Message)
+            .NotEmpty().WithMessage("Message is required.").WithErrorCode(HttpStatusCodes.BadRequest.ToString());
+    }
+}

backend/Application/Endpoints/MedicalHistories/ManageAuthorization/MedicalHistoryManageAuthorizationHandler.cs

@@ -1,6 +1,5 @@
 using Application.Services.Database;
 using Application.Services.Database.MongoDB;
-using Core.Entities;
 
 namespace Application.Endpoints.MedicalHistories.ManageAuthorization;
 
@@ -113,7 +112,6 @@ public class MedicalHistoryManageAuthorizationHandler
         }
         
         var authorisations = documents[0].Authorisation;
-        Console.WriteLine(authorisations);
         if (!authorisations.Contains(infoDto.DoctorId.ToString()))
         {
             return new BaseResponse()