mece request / payment economics

api/pkg/payments/economics/knobs.go

@@ -0,0 +1,101 @@
+package economics
+
+import (
+	"strings"
+
+	"github.com/tech/sendico/pkg/merrors"
+	paymentv1 "github.com/tech/sendico/pkg/proto/common/payment/v1"
+	quotationv2 "github.com/tech/sendico/pkg/proto/payments/quotation/v2"
+)
+
+const (
+	SettlementModeValueFixSource   = "fix_source"
+	SettlementModeValueFixReceived = "fix_received"
+
+	FeeTreatmentValueAddToSource           = "add_to_source"
+	FeeTreatmentValueDeductFromDestination = "deduct_from_destination"
+)
+
+func DefaultSettlementMode() paymentv1.SettlementMode {
+	return paymentv1.SettlementMode_SETTLEMENT_FIX_SOURCE
+}
+
+func DefaultFeeTreatment() quotationv2.FeeTreatment {
+	return quotationv2.FeeTreatment_FEE_TREATMENT_ADD_TO_SOURCE
+}
+
+func IsValidSettlementMode(mode paymentv1.SettlementMode) bool {
+	switch mode {
+	case paymentv1.SettlementMode_SETTLEMENT_UNSPECIFIED,
+		paymentv1.SettlementMode_SETTLEMENT_FIX_SOURCE,
+		paymentv1.SettlementMode_SETTLEMENT_FIX_RECEIVED:
+		return true
+	default:
+		return false
+	}
+}
+
+func IsValidFeeTreatment(value quotationv2.FeeTreatment) bool {
+	switch value {
+	case quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED,
+		quotationv2.FeeTreatment_FEE_TREATMENT_ADD_TO_SOURCE,
+		quotationv2.FeeTreatment_FEE_TREATMENT_DEDUCT_FROM_DESTINATION:
+		return true
+	default:
+		return false
+	}
+}
+
+func ResolveSettlementAndFee(
+	mode paymentv1.SettlementMode,
+	feeTreatment quotationv2.FeeTreatment,
+) (paymentv1.SettlementMode, quotationv2.FeeTreatment, error) {
+	if !IsValidSettlementMode(mode) {
+		return paymentv1.SettlementMode_SETTLEMENT_UNSPECIFIED, quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED, merrors.InvalidArgument("settlement_mode is invalid")
+	}
+	if !IsValidFeeTreatment(feeTreatment) {
+		return paymentv1.SettlementMode_SETTLEMENT_UNSPECIFIED, quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED, merrors.InvalidArgument("fee_treatment is invalid")
+	}
+
+	resolvedMode := mode
+	if resolvedMode == paymentv1.SettlementMode_SETTLEMENT_UNSPECIFIED {
+		resolvedMode = DefaultSettlementMode()
+	}
+	resolvedFee := feeTreatment
+	if resolvedFee == quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED {
+		resolvedFee = DefaultFeeTreatment()
+	}
+	return resolvedMode, resolvedFee, nil
+}
+
+func FeeTreatmentFromString(value string) (quotationv2.FeeTreatment, bool) {
+	switch strings.ToLower(strings.TrimSpace(value)) {
+	case "", "unspecified", "fee_treatment_unspecified":
+		return quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED, true
+	case FeeTreatmentValueAddToSource, "fee_treatment_add_to_source":
+		return quotationv2.FeeTreatment_FEE_TREATMENT_ADD_TO_SOURCE, true
+	case FeeTreatmentValueDeductFromDestination, "fee_treatment_deduct_from_destination":
+		return quotationv2.FeeTreatment_FEE_TREATMENT_DEDUCT_FROM_DESTINATION, true
+	default:
+		return quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED, false
+	}
+}
+
+func ResolveFeeTreatmentFromStringOrDefault(value string) quotationv2.FeeTreatment {
+	parsed, ok := FeeTreatmentFromString(value)
+	if !ok || parsed == quotationv2.FeeTreatment_FEE_TREATMENT_UNSPECIFIED {
+		return DefaultFeeTreatment()
+	}
+	return parsed
+}
+
+func FeeTreatmentValue(value quotationv2.FeeTreatment) string {
+	switch value {
+	case quotationv2.FeeTreatment_FEE_TREATMENT_DEDUCT_FROM_DESTINATION:
+		return FeeTreatmentValueDeductFromDestination
+	case quotationv2.FeeTreatment_FEE_TREATMENT_ADD_TO_SOURCE:
+		return FeeTreatmentValueAddToSource
+	default:
+		return ""
+	}
+}