public async Task <CreateMockChatsTxn_Output> Execute(CreateMockChatsTxn_Input input, IServiceProvider serviceProvider, MVCDbContext contextFather = null, bool autoCommit = true)
{
CreateMockChatsTxn_Output output = new CreateMockChatsTxn_Output();
output.ResultConfirmation = resultConfirmation.resultBad(_ResultMessage: "TXN_NOT_STARTED");
// Error handling
bool error = false; // To Handle Only One Error
try
{
MVCDbContext contextMGT = (contextFather != null) ? contextFather : new MVCDbContext();
// An using statement is in reality a try -> finally statement, disposing the element in the finally. So we need to take advance of that to create a DBContext inheritance
try
{
// DBContext by convention is a UnitOfWork, track changes and commits when SaveChanges is called
// Multithreading issue: so if we use only one DBContext, it will track all entities (_context.Customer.Add) and commit them when SaveChanges is called,
// No Matter what transactions or client calls SaveChanges.
// Note: Rollback will not remove the entities from the tracker in the context. so better dispose it.
//***** 0. Make The Validations - Be careful : Concurrency. Same name can be saved multiple times if called at the exact same time. Better have an alternate database constraint
// Company company = await contextMVC.Company.Where(x => x.Id.Equals(input.Company.Id)).FirstOrDefaultAsync();
// Validate user status, user company, user not blocked, etc
// One way to do it: Try to save without validations, if constraints fail (inner update db update) then run queries to check what went wrong
// Call transaction to create a New Company
CreateCompanyTxn_Input createCompanyTxn_Input = new CreateCompanyTxn_Input {
Company = new company {
name = input.CompanyName, email = input.CompanyName + "@company.com", password = input.CompanyName + "123"
}
};
CreateCompanyTxn_Output createCompanyTxn = await new GraphQLMutation().CreateCompanyTxn(input: createCompanyTxn_Input, serviceProvider: serviceProvider);
if (!createCompanyTxn.ResultConfirmation.resultPassed)
{
error = true;
output.ResultConfirmation = createCompanyTxn.ResultConfirmation;
return(output);
}
// Create Users
for (int i = 0; i < input.UsersToCreate; i++)
{
// Call transaction to create a New User
CreateUserTxn_Input createUserTxn_Input = new CreateUserTxn_Input {
User = new userApp {
userName = i.ToString() + "_" + createCompanyTxn.Company.companyId, email = i.ToString() + "@User.com", password = "******"
}, Company = new company {
companyId = createCompanyTxn.Company.companyId
}
};
CreateUserTxn_Output createUserTxn = await new GraphQLMutation().CreateUserTxn(input: createUserTxn_Input, serviceProvider: serviceProvider);
if (!createUserTxn.ResultConfirmation.resultPassed)
{
error = true;
output.ResultConfirmation = createUserTxn.ResultConfirmation;
return(output);
}
}
// Create chats
List <chat> chatsNew = new List <chat>();
for (int i = 0; i < input.ChatsToCreate; i++)
{
DateTime utcNow = DateTime.UtcNow;
// Create the chat
chat chat = new chat {
chatId = 0, name = "Chat " + i, companyId = createCompanyTxn.Company.companyId, createdAt = utcNow, updatedAt = utcNow, type = "Chat"
};
// Add participants
List <participant> participants = (from user in contextMGT.UserApp
where user.companyId.Equals(createCompanyTxn.Company.companyId)
select new participant {
participantId = 0, chatId = 0, isAdmin = false, userAppId = user.userAppId
})
.OrderBy(x => x.userAppId)
.Take(input.UsersToCreate - i)
.ToList();
chat.participants = participants;
/*
* // Add comments Seen
* List<Comment> commentsSeen = (from part in participants
* select new Comment { CommentId = 0, ChatId = 0, Message = "Message ", CreatedAt = utcNow.AddMinutes(-1), UserAppId = part.UserAppId })
* .ToList();
*
* foreach (var comm in commentsSeen)
* {
* // Create and Save the CommentInfo for each user.
* var query = from user in participants
* select new CommentInfo { CommentInfoId = 0, CommentId = 0, CreatedAt = utcNow.AddMinutes(-1), Delivered = true, Seen = true, SeenAt = utcNow.AddMinutes(-1), UserAppId = user.UserAppId };
*
* comm.CommentsInfo = query.ToList();
* }
*
* // Add comments Seen
* List<Comment> commentsUnseen = (from part in participants
* select new Comment { CommentId = 0, ChatId = 0, Message = "Message ", CreatedAt = utcNow, UserAppId = part.UserAppId })
* .ToList();
*
* foreach (var comm in commentsUnseen)
* {
* // Create and Save the CommentInfo for each user.
* var query = from user in participants
* select new CommentInfo { CommentInfoId = 0, CommentId = 0, CreatedAt = utcNow, Delivered = true, Seen = false, UserAppId = user.UserAppId };
*
* comm.CommentsInfo = query.ToList();
* }
*/
// Add one comment for each participant
List <comment> commentsUnseen = (from part in participants
select new comment {
commentId = 0, chatId = 0, message = "Msg " + part.userAppId, createdAt = utcNow, userAppId = part.userAppId
})
.ToList();
foreach (var comm in commentsUnseen)
{
// Create and Save the CommentInfo for each user.
var query = from user in participants
select new commentInfo {
commentInfoId = 0, commentId = 0, createdAt = utcNow, delivered = true, seen = false, userAppId = user.userAppId
};
comm.commentsInfo = query.ToList();
}
chat.comments = commentsUnseen;
// Call transaction to create a New Chat
CreateChatTxn_Input createChatTxn_Input = new CreateChatTxn_Input {
Chat = chat
};
CreateChatTxn_Output createChatTxn = await new GraphQLMutation().CreateChatTxn(input: createChatTxn_Input);
if (!createChatTxn.ResultConfirmation.resultPassed)
{
error = true;
output.ResultConfirmation = createChatTxn.ResultConfirmation;
return(output);
}
chatsNew.Add(createChatTxn.Chat);
//***** 4. Save and Commit to the Database (Atomic because is same Context DB)
if (!error && autoCommit)
{
await contextMGT.SaveChangesAsync(); // Call it only once so do all other operations first
}
}// for (int i = 0; i < input.ChatsToCreate; i++)
//***** 4. Save and Commit to the Database (Atomic because is same Context DB)
if (!error && autoCommit)
{
await contextMGT.SaveChangesAsync(); // Call it only once so do all other operations first
}
//***** 5. Execute Send e-mails or other events once the database has been succesfully saved
//***** If this task fails, there are options -> 1. Retry multiple times 2. Save the event as Delay, 3.Rollback Database, Re
//***** 6. Confirm the Result (Pass | Fail) If gets to here there are not errors then return the new data from database
output.ResultConfirmation = resultConfirmation.resultGood(_ResultMessage: "CHAT_SUCESSFULLY_CREATED"); // If OK
output.Chats = chatsNew;
}
finally
{
// If the context Father is null the context was created on his own, so dispose it
if (contextMGT != null && contextFather == null)
{
contextMGT.Dispose();
}
}
}
catch (Exception ex) // Main try
{
System.Diagnostics.Debug.WriteLine("Error: " + ex.Message);
string innerError = (ex.InnerException != null) ? ex.InnerException.Message : "";
System.Diagnostics.Debug.WriteLine("Error Inner: " + innerError);
output = new CreateMockChatsTxn_Output(); // Restart variable to avoid returning any already saved data
output.ResultConfirmation = resultConfirmation.resultBad(_ResultMessage: "EXCEPTION", _ResultDetail: ex.Message);
}
finally
{
// Save Logs if needed
}
return(output);
}
public async Task <CreateChatTxn_Output> Execute(CreateChatTxn_Input input, MVCDbContext contextFather = null, bool autoCommit = true)
{
CreateChatTxn_Output output = new CreateChatTxn_Output();
output.ResultConfirmation = resultConfirmation.resultBad(_ResultMessage: "TXN_NOT_STARTED");
// Error handling
bool error = false; // To Handle Only One Error
bool chatFound = false; // To see if the chat already exists
try
{
MVCDbContext contextMGT = (contextFather != null) ? contextFather : new MVCDbContext();
// An using statement is in reality a try -> finally statement, disposing the element in the finally. So we need to take advance of that to create a DBContext inheritance
try
{
// DBContext by convention is a UnitOfWork, track changes and commits when SaveChanges is called
// Multithreading issue: so if we use only one DBContext, it will track all entities (_context.Customer.Add) and commit them when SaveChanges is called,
// No Matter what transactions or client calls SaveChanges.
// Note: Rollback will not remove the entities from the tracker in the context. so better dispose it.
//***** 0. Make The Validations - Be careful : Concurrency. Same name can be saved multiple times if called at the exact same time. Better have an alternate database constraint
// Company company = await contextMVC.Company.Where(x => x.Id.Equals(input.Company.Id)).FirstOrDefaultAsync();
// Validate user status, user company, user not blocked, etc
// One way to do it: Try to save without validations, if constraints fail (inner update db update) then run queries to check what went wrong
company companyDb = await contextMGT.Company.Where(x => x.companyId.Equals(input.Chat.companyId)).FirstOrDefaultAsync();
if (companyDb == null)
{
error = true;
output.ResultConfirmation = resultConfirmation.resultBad(_ResultMessage: "COMPANY_DOES_NOT_EXIST_ERROR", _ResultDetail: "");
}
// Try to find a Chat already crated for the same users. If the chat exists, return the chat
if (!error)
{
DateTime nowUTC = DateTime.UtcNow;
//***** 0. Validate if the Chat exists, so return that Chat
List <String> userIds = input.Chat.participants
.GroupBy(g => g.userAppId)
.Select(user => user.Key) // extract unique Ids from users
.ToList();
chat chatDb = await contextMGT.Chat.Include(o => o.participants)
.Where(company => company.companyId == input.Chat.companyId) // It's the same company
.Where(x => x.participants.Count == input.Chat.participants.Count) // Have the same number of users
.Where(x => x.participants.All(users => userIds.Contains(users.userAppId))) // Have the same users by Id
.FirstOrDefaultAsync();
if (chatDb != null)
{
chatFound = true;
chatDb.updatedAt = nowUTC;
input.Chat.comments = null;
/* Dont save comments during Create Chat
*
*
* // Save the comments into the Database
* foreach (var comment in input.Chat.Comments)
* {
* comment.CommentId = 0;
* comment.ChatId = chatDb.ChatId;
* comment.CreatedAt = nowUTC;
* contextMGT.Comment.Add(comment);
* }
*/
output.ResultConfirmation = resultConfirmation.resultGood(_ResultMessage: "CHAT_SUCESSFULLY_FOUND"); // If Found
output.Chat = chatDb;
}
//***** 1. Create the Chat (Atomic because is same Context DB)
if (!chatFound)
{
// Create the Chat To Save
input.Chat.chatId = 0;
input.Chat.createdAt = nowUTC;
input.Chat.updatedAt = nowUTC;
if (input.Chat.comments != null)
{
input.Chat.comments.ForEach(x => x.createdAt = nowUTC);
}
// Save the chat to the context
contextMGT.Chat.Add(input.Chat);
output.ResultConfirmation = resultConfirmation.resultGood(_ResultMessage: "CHAT_SUCESSFULLY_CREATED"); // If OK
output.Chat = input.Chat;
}
//***** 4. Save and Commit to the Database (Atomic because is same Context DB)
if (!error && autoCommit)
{
await contextMGT.SaveChangesAsync(); // Call it only once so do all other operations first
}
//***** 5. Execute Send e-mails or other events once the database has been succesfully saved
//***** If this task fails, there are options -> 1. Retry multiple times 2. Save the event as Delay, 3.Rollback Database, Re
//***** 6. Confirm the Result (Pass | Fail) If gets to here there are not errors then return the new data from database
}// if (!error)
}
finally
{
// If the context Father is null the context was created on his own, so dispose it
if (contextMGT != null && contextFather == null)
{
contextMGT.Dispose();
}
}
}
catch (Exception ex) // Main try
{
System.Diagnostics.Debug.WriteLine("Error: " + ex.Message);
string innerError = (ex.InnerException != null) ? ex.InnerException.Message : "";
System.Diagnostics.Debug.WriteLine("Error Inner: " + innerError);
output = new CreateChatTxn_Output(); // Restart variable to avoid returning any already saved data
output.ResultConfirmation = resultConfirmation.resultBad(_ResultMessage: "EXCEPTION", _ResultDetail: ex.Message);
}
finally
{
// Save Logs if needed
}
return(output);
}
