accept --cpi=FILE --cpiy=YEAR to translate money to target year

src/ana/normalize.go

@@ -68,15 +68,15 @@ func (n Normalizer) Normalize(deltas ledger.Deltas) ledger.Deltas {
 }
 
 func (n Normalizer) NormalizeDelta(delta ledger.Delta) ledger.Delta {
-	delta.Value /= n.NormalizeFactor(delta)
+	delta.Value /= n.NormalizeFactor(delta.Name, delta.Date)
 	return delta
 }
 
-func (n Normalizer) NormalizeFactor(delta ledger.Delta) float64 {
+func (n Normalizer) NormalizeFactor(name, date string) float64 {
 	for pattern := range n.m {
-		if regexp.MustCompile(pattern).MatchString(delta.Name) {
+		if regexp.MustCompile(pattern).MatchString(name) {
 			for _, normalize := range n.m[pattern] {
-				if normalize.startDate < delta.Date {
+				if normalize.startDate < date {
 					return normalize.factor
 				}
 			}

src/ledger/balances.go

@@ -9,6 +9,10 @@ import (
 	"time"
 )
 
+type Normalizer interface {
+	NormalizeFactor(string, string) float64
+}
+
 type Balances map[string]Balance
 
 type Balance map[Currency]float64
@@ -246,3 +250,14 @@ func (balance Balance) Debug() string {
 	}
 	return strings.Join(result, " + ")
 }
+
+func (balances Balances) Normalize(n Normalizer, date string) Balances {
+	result := make(Balances)
+	for name, balance := range balances {
+		result[name] = make(Balance)
+		for currency, value := range balance {
+			result[name][currency] = value / n.NormalizeFactor(name, date)
+		}
+	}
+	return result
+}