someday

ledger/delta.go

@@ -0,0 +1,38 @@
+package ledger
+
+import (
+	"time"
+
+	"github.com/howeyc/ledger"
+)
+
+type Currency string
+
+const (
+	USD = Currency("$")
+)
+
+type Delta struct {
+	Date     time.Time
+	Account  string
+	Value    float64
+	Currency Currency
+}
+
+func newDeltas(t *ledger.Transaction) []Delta {
+	result := make([]Delta, len(t.AccountChanges))
+	for i, a := range t.AccountChanges {
+		result[i] = newDelta(t.Date, a)
+	}
+	return result
+}
+
+func newDelta(d time.Time, a ledger.Account) Delta {
+	value, _ := a.Balance.Float64()
+	return Delta{
+		Date:     d,
+		Account:  a.Name,
+		Value:    value,
+		Currency: USD, // TODO
+	}
+}