package ledger

import (
	"time"
)

type Currency string

const (
	USD = Currency("$")
)

type Delta struct {
	Date     time.Time
	Account  string
	Value    float64
	Currency Currency
}

func newDelta(d time.Time, a string, v float64) Delta {
	return Delta{
		Date:     d,
		Account:  a,
		Value:    v,
		Currency: USD, // TODO
	}
}

func (delta Delta) Plus(other Delta) Delta {
	return Delta{
		Date:     other.Date,
		Account:  delta.Account,
		Value:    delta.Value + other.Value,
		Currency: other.Currency,
	}
}