private async Task <UserEntry> AuthenticateByOneDB(string email, string tenantID, ClusterContext db, UserID userID)
{
var priorEntrys = db.User.Where(b => b.Email == email).ToAsyncEnumerable();
long nEntry = 0;
UserEntry ret = null;
// Prior entry exists?
await priorEntrys.ForEachAsync(entry =>
{
// We will not update existing entry in database.
// db.Entry(entry).CurrentValues.SetValues(userEntry);
ret = entry;
Interlocked.Add(ref nEntry, 1);
}
);
if (Interlocked.Read(ref nEntry) == 0)
{
if (!Object.ReferenceEquals(userID, null))
{
string password = Guid.NewGuid().ToString().Substring(0, 8);
UserEntry userEntry = new UserEntry(userID, email, email, password);
await db.User.AddAsync(userEntry);
await db.SaveChangesAsync();
return(userEntry);
}
else
{
return(null);
}
}
else
{
// Prior entry exists, we use the database as the authorative source.
UserEntry newEntry = ret;
// Update is AuthorizedEntry only, other entry will be updated by database.
if (!Object.ReferenceEquals(userID, null))
{
bool bUpdate = false;
if (String.Compare(ret.isAuthorized, userID.isAuthorized, true) < 0 || String.Compare(ret.isAdmin, userID.isAdmin, true) < 0)
{
// userID isAuthorized is true
newEntry.isAuthorized = userID.isAuthorized;
newEntry.isAdmin = userID.isAdmin;
newEntry.uid = userID.uid;
newEntry.gid = userID.gid;
bUpdate = true;
}
if (bUpdate)
{
db.Entry(ret).CurrentValues.SetValues(newEntry);
await db.SaveChangesAsync();
}
}
if (newEntry.Alias != newEntry.Email)
{
return(await AuthenticateByOneDB(newEntry.Alias, tenantID, db, userID));
}
else
{
return(newEntry);
}
}
}