test start

src/ledger/transaction.go

@@ -30,6 +30,42 @@ type transactionRecipient struct {
 	isSet    bool
 }
 
+func (t transaction) deltas() Deltas {
+	result := []Delta{}
+	sums := map[string]float64{}
+	for _, recipient := range t.recipients {
+		sums[recipient.currency] += recipient.value
+		result = append(result, newDelta(
+			t.name,
+			t.date,
+			t.description,
+			recipient.name,
+			recipient.value,
+			recipient.currency,
+			recipient.isSet,
+		))
+	}
+	for currency, value := range sums {
+		if value == 0 {
+			continue
+		}
+		if t.payee == "" {
+			//return nil, fmt.Errorf("didnt find net zero and no dumping ground payee set: %+v", transaction)
+		} else {
+			result = append(result, newDelta(
+				t.name,
+				t.date,
+				t.description,
+				t.payee,
+				-1.0*value,
+				currency,
+				false,
+			))
+		}
+	}
+	return result
+}
+
 func (t transactionRecipient) empty() bool {
 	return t == (transactionRecipient{})
 }