func NewAccountFromHistory(id string, repository cqrs.EventSourcingRepository) (*Account, error) {
account := new(Account)
account.EventSourceBased = cqrs.NewEventSourceBasedWithID(account, id)
if error := repository.Get(id, account); error != nil {
return account, error
}
return account, nil
}
func RegisterCommandHandlers(commandDispatcher *cqrs.CommandDispatchManager, repository cqrs.EventSourcingRepository) {
commandDispatcher.RegisterCommandHandler(CreateAccountCommand{}, func(command cqrs.Command) error {
createAccountCommand := command.Body.(CreateAccountCommand)
log.Println(glr.Green("Processing command - Create account"))
account := NewAccount(createAccountCommand.FirstName,
createAccountCommand.LastName,
createAccountCommand.EmailAddress,
createAccountCommand.PasswordHash,
createAccountCommand.InitialBalance)
log.Println(glr.Green("Set ID..."))
account.SetID(accountID)
log.Println(account)
log.Println(glr.Green("Persist the account"))
repository.Save(account, command.CorrelationID)
log.Println(glr.Green(account.String()))
return nil
})
commandDispatcher.RegisterCommandHandler(ChangeEmailAddressCommand{}, func(command cqrs.Command) error {
changeEmailAddressCommand := command.Body.(ChangeEmailAddressCommand)
log.Println(glr.Green("Processing command - Change email address"))
account, err := NewAccountFromHistory(changeEmailAddressCommand.AccountID, repository)
if err != nil {
return err
}
account.ChangeEmailAddress(changeEmailAddressCommand.NewEmailAddress)
log.Println(glr.Green("Persist the account"))
repository.Save(account, command.CorrelationID)
log.Println(glr.Green(account.String()))
return nil
})
commandDispatcher.RegisterCommandHandler(ChangePasswordCommand{}, func(command cqrs.Command) error {
changePasswordCommand := command.Body.(ChangePasswordCommand)
log.Println(glr.Green("Processing command - Change password"))
account, err := NewAccountFromHistory(changePasswordCommand.AccountID, repository)
if err != nil {
return err
}
account.ChangePassword(changePasswordCommand.NewPassword)
log.Println(glr.Green("Persist the account"))
repository.Save(account, command.CorrelationID)
log.Println(glr.Green(account.String()))
return nil
})
commandDispatcher.RegisterCommandHandler(CreditAccountCommand{}, func(command cqrs.Command) error {
creditAccountCommand := command.Body.(CreditAccountCommand)
log.Println(glr.Green("Processing command - Credit account"))
account, err := NewAccountFromHistory(creditAccountCommand.AccountID, repository)
if err != nil {
return err
}
account.Credit(creditAccountCommand.Amount)
log.Println(glr.Green("Persist the account"))
repository.Save(account, command.CorrelationID)
log.Println(glr.Green(account.String()))
return nil
})
commandDispatcher.RegisterCommandHandler(DebitAccountCommand{}, func(command cqrs.Command) error {
debitAccountCommand := command.Body.(DebitAccountCommand)
log.Println(glr.Green("Processing command - Debit account"))
account, err := NewAccountFromHistory(debitAccountCommand.AccountID, repository)
if err != nil {
return err
}
if err := account.Debit(debitAccountCommand.Amount); err != nil {
return err
}
log.Println(glr.Green("Persist the account"))
repository.Save(account, command.CorrelationID)
log.Println(glr.Green(account.String()))
return nil
})
}