/// <summary>
/// Authorize a user creating a chat message for a chat group using the Signalr ChatHub
/// </summary>
/// <param name="context"></param>
/// <param name="requirement"></param>
/// <param name="resource"></param>
/// <returns></returns>
protected override async Task <Task> HandleRequirementAsync(AuthorizationHandlerContext context,
UserCanCreateChatMessageRequirement requirement,
HubInvocationContext resource)
{
if (context.User == null)
{
return(Task.CompletedTask);
}
Claim userEmail = resource.Context.User.FindFirst(ClaimTypes.Email);
User user = await _userManager.FindByEmailAsync(userEmail.Value.ToString());
if (user == null)
{
return(Task.CompletedTask);
}
if (resource.HubMethodArguments.Count == 0)
{
return(Task.CompletedTask);
}
CreateChatMessageDTO chatMessageDTO = resource.HubMethodArguments[0] as CreateChatMessageDTO;
ChatGroupUser chatGroupUser = await _chatGroupUserService.GetByUserAndChatGroupAsync(
user.Id, chatMessageDTO.ChatGroupUuid);
if (user != null && chatGroupUser != null && chatGroupUser.UserId.Equals(user.Id))
{
//User is chat group member
context.Succeed(requirement);
}
return(Task.CompletedTask);
}
public async Task <ActionResult <ChatGroupUserResponse> > RemoveUserFromChatGroupAsync(Guid chatGroupUuid)
{
string userEmail = User.FindFirstValue(ClaimTypes.Email);
User user = await _userManager.FindByEmailAsync(userEmail);
if (user == null)
{
return(Forbid());
}
ChatGroupUser chatGroupUser = await _chatGroupUserService.GetByUserAndChatGroupAsync(
user.Id, chatGroupUuid);
// Check if user is authorized to remove user from the chat group
AuthorizationResult isAuthorized = await _authorizationService.AuthorizeAsync(
User,
chatGroupUser,
Operations.Create);
if (!isAuthorized.Succeeded)
{
return(Forbid());
}
return(await _chatGroupUserService.RemoveUserFromChatGroupAsync(user, chatGroupUuid));
}
public async Task <ActionResult <IEnumerable <ChatMessageDTO> > > ListMessagesForGroup(Guid chatGroupUuid)
{
string userEmail = User.FindFirstValue(ClaimTypes.Email);
User user = await _userManager.FindByEmailAsync(userEmail);
if (user == null)
{
return(Forbid());
}
ChatGroupUser chatGroupUser = await _chatGroupUserService.GetByUserAndChatGroupAsync(
user.Id, chatGroupUuid);
// Check if user is authorized to read users for the chat group
AuthorizationResult isAuthorized = await _authorizationService.AuthorizeAsync(
User,
chatGroupUser,
Operations.Create);
if (!isAuthorized.Succeeded)
{
return(Forbid());
}
IEnumerable <ChatMessageDTO> messages = await _chatMessageService.ListMessagesForGroupAsync(chatGroupUuid);
return(Ok(messages));
}
public IList <ChatGroup> GetAllGroup(int userId)
{
ChatGroupUser chatGroupUser = null;
return(this._commonDao.OpenSession().QueryOver <ChatGroup>().Left.JoinAlias(c => c.ChatGroupUsers, () => chatGroupUser)
.Where(c => chatGroupUser.User.Id == userId).OrderBy(m => m.Id).Desc.List());
}
public async Task <ChatGroupUserResponse> AddUserToChatGroupAsync(User user, Guid chatGroupUuid)
{
try
{
ChatGroup chatGroup = await _chatGroupRepository.GetByUuidAsync(chatGroupUuid);
if (chatGroup == null)
{
return(new ChatGroupUserResponse {
ErrorMessage = "Chat group does not exist"
});
}
// Check if user is already member of chat group
ChatGroupUser chatGroupUser = await _chatGroupUserRepository.GetByUserAndChatGroupAsync(
user.Id, chatGroup.ChatGroupId);
if (chatGroupUser != null)
{
return(new ChatGroupUserResponse
{
ErrorMessage = $"User {user.Id} is already a member of chat group {chatGroup.Uuid}"
});
}
ChatGroupUser saveChatGroupUser = new ChatGroupUser
{
UserId = user.Id,
User = user,
ChatGroupId = chatGroup.ChatGroupId,
ChatGroup = chatGroup,
};
//Save the message
await _chatGroupUserRepository.AddUserToChatGroupAsync(saveChatGroupUser);
await _unitOfWork.CompleteAsync();
return(new ChatGroupUserResponse
{
Success = true,
});
}
catch (Exception ex)
{
// TODO logging
return(new ChatGroupUserResponse {
ErrorMessage = $"An error occurred when saving the ChatGroupUser resource: {ex.Message}"
});
}
}
public async Task <ChatGroupUserResponse> RemoveUserFromChatGroupAsync(User user, Guid chatGroupUuid)
{
try
{
ChatGroup chatGroup = await _chatGroupRepository.GetByUuidAsync(chatGroupUuid);
if (chatGroup == null)
{
return(new ChatGroupUserResponse {
ErrorMessage = "Chat group does not exist"
});
}
// Check if user is already member of chat group
ChatGroupUser chatGroupUser = await _chatGroupUserRepository.GetByUserAndChatGroupAsync(
user.Id, chatGroupUuid);
if (chatGroupUser == null)
{
return(new ChatGroupUserResponse
{
ErrorMessage = $"User {user.Id} is not a member of chat group {chatGroupUuid}"
});
}
// Delete the ChatGroupUser entry
_chatGroupUserRepository.RemoveUserFromChatGroup(chatGroupUser);
await _unitOfWork.CompleteAsync();
return(new ChatGroupUserResponse
{
Success = true,
ErrorMessage = string.Empty
});
}
catch (Exception ex)
{
// TODO logging
return(new ChatGroupUserResponse {
ErrorMessage = $"An error occurred when deleting the ChatGroupUser resource: {ex.Message}"
});
}
}
public async Task <ActionResult <ChatMessageResponse> > CreateChatMessage([FromBody] CreateChatMessageDTO chatMessageDTO)
{
string userEmail = User.FindFirstValue(ClaimTypes.Email);
User user = await _userManager.FindByEmailAsync(userEmail);
if (user == null)
{
return(NotFound(new ChatMessageResponse {
Success = false, ErrorMessage = "User does not exist"
}));
}
ChatGroupUser chatGroupUser = await _chatGroupUserService.GetByUserAndChatGroupAsync(
user.Id, chatMessageDTO.ChatGroupUuid);
// Check if user is authorized to create chat messages for the chat group
AuthorizationResult isAuthorized = await _authorizationService.AuthorizeAsync(
User,
chatGroupUser,
Operations.Create);
if (!isAuthorized.Succeeded)
{
return(Forbid());
}
CreateChatMessage chatMessage = new CreateChatMessage
{
User = user,
Message = chatMessageDTO.Message,
ChatGroupUuid = chatMessageDTO.ChatGroupUuid
};
ChatMessageResponse createRes = await _chatMessageService.CreateChatMessageAsync(chatMessage);
// Broadcast message to only clients who are members of the chat group
await _chatHubContext.Clients.Group(chatMessageDTO.ChatGroupUuid.ToString()).SendAsync("ReceiveMessage", createRes);
return(createRes);
}
public void RemoveUserFromChatGroup(ChatGroupUser chatGroupUser)
{
_context.ChatGroupUsers.Remove(chatGroupUser);
}
public async Task AddUserToChatGroupAsync(ChatGroupUser chatGroupUser)
{
await _context.ChatGroupUsers.AddAsync(chatGroupUser);
}