protected internal virtual async Task <UserEntity> EnsureLoginUserAsync(UserLoginModel userLogin)
{
if (userLogin == null)
{
throw new ArgumentNullException(nameof(userLogin));
}
UserEntity loginUser = null;
if (userLogin.Id != null)
{
loginUser = await this.DatabaseContext.Users.FindAsync(userLogin.Id);
}
if (loginUser == null)
{
loginUser = new UserEntity {
Id = userLogin.Id ?? Guid.NewGuid().ToString(), UserName = Guid.NewGuid().ToString()
};
loginUser.NormalizedUserName = loginUser.UserName.ToUpperInvariant();
await this.DatabaseContext.Users.AddAsync(loginUser);
}
else
{
if (loginUser.PasswordHash != null)
{
throw new InvalidOperationException($"The user with id {loginUser.Id.ToStringRepresentation()} already exists with a password and can not be associated with a login.");
}
loginUser.SecurityStamp = Guid.NewGuid().ToString();
}
return(loginUser);
}
protected internal virtual async Task <UserLoginEntity> UserLoginModelToUserLoginEntityAsync(UserLoginModel userLogin)
{
UserLoginEntity userLoginEntity = null;
if (userLogin != null)
{
userLoginEntity = new UserLoginEntity {
LoginProvider = userLogin.Provider, ProviderDisplayName = userLogin.Provider, ProviderKey = userLogin.UserIdentifier, UserId = userLogin.Id
}
}
;
return(await Task.FromResult(userLoginEntity));
}
public virtual async Task <IdentityResult> SaveUserLoginAsync(UserLoginModel userLogin, bool allowMultipleLoginsForUser = false)
{
if (userLogin == null)
{
throw new ArgumentNullException(nameof(userLogin));
}
if (userLogin.Provider == null)
{
throw new ArgumentException("The user-login-provider can not be null.", nameof(userLogin));
}
if (userLogin.UserIdentifier == null)
{
throw new ArgumentException("The user-login-user-identifier can not be null.", nameof(userLogin));
}
try
{
var existingUserLogin = await this.DatabaseContext.UserLogins.FirstOrDefaultAsync(item => item.LoginProvider == userLogin.Provider && item.ProviderKey == userLogin.UserIdentifier);
if (existingUserLogin != null)
{
if (userLogin.Id != null && !string.Equals(userLogin.Id, existingUserLogin.UserId, StringComparison.OrdinalIgnoreCase))
{
var oldLoginUserId = existingUserLogin.UserId;
var numberOfUserLoginsForOldLoginUserId = await this.DatabaseContext.UserLogins.CountAsync(item => item.UserId == oldLoginUserId);
var newLoginUser = await this.EnsureLoginUserAsync(userLogin);
existingUserLogin.UserId = newLoginUser.Id;
if (numberOfUserLoginsForOldLoginUserId < 2)
{
this.DatabaseContext.Users.Remove(await this.DatabaseContext.Users.FindAsync(oldLoginUserId));
}
else
{
this.DatabaseContext.UserClaims.RemoveRange(this.DatabaseContext.UserClaims.Where(item => item.UserId == oldLoginUserId));
(await this.DatabaseContext.Users.FindAsync(oldLoginUserId)).SecurityStamp = Guid.NewGuid().ToString();
}
}
}
else
{
var loginUser = await this.EnsureLoginUserAsync(userLogin);
this.DatabaseContext.UserClaims.RemoveRange(this.DatabaseContext.UserClaims.Where(item => item.UserId == loginUser.Id));
this.DatabaseContext.UserLogins.RemoveRange(this.DatabaseContext.UserLogins.Where(item => item.UserId == loginUser.Id));
await this.DatabaseContext.UserLogins.AddAsync(new UserLoginEntity { LoginProvider = userLogin.Provider, ProviderDisplayName = userLogin.Provider, ProviderKey = userLogin.UserIdentifier, UserId = loginUser.Id });
}
if (!allowMultipleLoginsForUser && userLogin.Id != null)
{
var userLoginsToDelete = this.DatabaseContext.UserLogins.Where(item => item.UserId == userLogin.Id && item.LoginProvider != userLogin.Provider && item.ProviderKey != userLogin.UserIdentifier);
if (userLoginsToDelete.Any())
{
this.DatabaseContext.UserLogins.RemoveRange(userLoginsToDelete);
this.DatabaseContext.UserClaims.RemoveRange(this.DatabaseContext.UserClaims.Where(item => item.UserId == userLogin.Id));
(await this.DatabaseContext.Users.FindAsync(userLogin.Id)).SecurityStamp = Guid.NewGuid().ToString();
}
}
return(IdentityResult.Success);
}
catch (Exception exception)
{
throw new InvalidOperationException($"Could not save user-login with id {userLogin.Id.ToStringRepresentation()}, provider {userLogin.Provider.ToStringRepresentation()} and user-identifier {userLogin.UserIdentifier.ToStringRepresentation()}.", exception);
}
}
