public async Task <LoginUserTxnPayload> LoginUser(
LoginUserTxnInput input,
[Service] IConfiguration configuration,
[Service] UserManager <IdentityUser> userManager,
[Service] SignInManager <IdentityUser> signInManager,
[Service] ApplicationDbContext contextMVC)
{
return(await new LoginUserTxn().Execute(
input: input,
configuration: configuration,
userManager: userManager,
signInManager: signInManager,
contextMVC: contextMVC,
autoCommit: true
));
}
public async Task <LoginUserTxnPayload> Execute(
LoginUserTxnInput input,
IConfiguration configuration,
UserManager <IdentityUser> userManager,
SignInManager <IdentityUser> signInManager,
ApplicationDbContext contextMVC,
bool autoCommit)
{
LoginUserTxnPayload _payload = new LoginUserTxnPayload();
//***** Declare variables and messages
string errorMessage = "LoginUserTxn***LOGIN_FAIL";
string okMessage = "LoginUserTxn***LOGIN_PASS";
string errorMessageExceptionCode = "LoginUserTxn***TXN_EXCEPTION";
string errorMessageException = "TXN_EXCEPTION";
// Error handling
bool error = false; // To Handle Only One Error
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.
//***** 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
if (!error)
{
// To check later - RefreshToken
// https://stackoverflow.com/questions/53659247/using-aspnetusertokens-table-to-store-refresh-token-in-asp-net-core-web-api
var result = await signInManager.PasswordSignInAsync(userName : input.Email, password : input.Password, isPersistent : false, lockoutOnFailure : false);
if (!result.Succeeded)
{
_payload.PayloadResult = PayloadResult.ResultBad(Messages: new List <MessageItem>()
{
new MessageItem {
Code = errorMessage, Message = errorMessage, Detail = ""
}
});
return(_payload);
}
var user = await signInManager.UserManager.FindByEmailAsync(input.Email);
if (user == null)
{
_payload.PayloadResult = PayloadResult.ResultBad(Messages: new List <MessageItem>()
{
new MessageItem {
Code = errorMessage, Message = errorMessage, Detail = ""
}
});
return(_payload);
}
// Get the UserApp
var userApp = await contextMVC.UserApp.Where(x => x.IdentityId == user.Id).FirstOrDefaultAsync();
if (userApp == null)
{
_payload.PayloadResult = PayloadResult.ResultBad(Messages: new List <MessageItem>()
{
new MessageItem {
Code = errorMessage, Message = errorMessage, Detail = ""
}
});
return(_payload);
}
//***** Save and Commit to the Database (Atomic because is same Context DB)
if (!error && autoCommit)
{
await contextMVC.SaveChangesAsync(); // Call it only once so do all other operations first
}
//***** Confirm the Result (Pass | Fail) If gets to here there are not errors then return the new data from database
_payload.PayloadResult = PayloadResult.ResultGood(Messages: new List <MessageItem> {
new MessageItem {
Code = okMessage, Message = okMessage, Detail = ""
}
});
_payload.JWTInfo = await this.CreateTokenAsync(user, userApp, configuration, userManager);
}// if (!error)
}
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);
_payload = new LoginUserTxnPayload
{
PayloadResult = PayloadResult.ResultBad(Messages: new List <MessageItem> {
new MessageItem {
Code = errorMessageExceptionCode, Message = errorMessageException, Detail = ex.Message
}
})
}; // Restart variable to avoid returning any already saved data
}
finally
{
// Save Logs if needed
}
return(_payload);
}
