Add per-user default currency

securities.go

@@ -36,7 +36,7 @@ type Security struct {
 	// security is precise to
 	Precision int
 	Type      int64
-	// AlternateId is CUSIP for Type=Stock
+	// AlternateId is CUSIP for Type=Stock, ISO4217 for Type=Currency
 	AlternateId string
 }
 
@@ -86,6 +86,16 @@ func FindSecurityTemplate(name string, _type int64) *Security {
 	return nil
 }
 
+func FindCurrencyTemplate(iso4217 int64) *Security {
+	iso4217string := strconv.FormatInt(iso4217, 10)
+	for _, security := range SecurityTemplates {
+		if security.Type == Currency && security.AlternateId == iso4217string {
+			return &security
+		}
+	}
+	return nil
+}
+
 func GetSecurity(securityid int64, userid int64) (*Security, error) {
 	var s Security
 
@@ -171,6 +181,15 @@ func DeleteSecurity(s *Security) error {
 		return errors.New("One or more accounts still use this security")
 	}
 
+	user, err := GetUserTx(transaction, s.UserId)
+	if err != nil {
+		transaction.Rollback()
+		return err
+	} else if user.DefaultCurrency == s.SecurityId {
+		transaction.Rollback()
+		return errors.New("Cannot delete security which is user's default currency")
+	}
+
 	count, err := transaction.Delete(s)
 	if err != nil {
 		transaction.Rollback()