feat: initial version

error.go

@@ -0,0 +1,96 @@
+package presenter
+
+import "errors"
+
+type (
+	Code   string
+	Entity string
+)
+
+const (
+	CodeConflict           = Code("CONFLICT")
+	CodeNotFound           = Code("NOT_FOUND")
+	CodePreconditionFailed = Code("PRECONDITION_FAILED")
+)
+
+const (
+	EntityCompany             = Entity("COMPANY")
+	EntityConsumer            = Entity("CONSUMER")
+	EntityAddress             = Entity("ADDRESS")
+	EntityContactPerson       = Entity("CONTACT_PERSON")
+	EntityActivity            = Entity("ACTIVITY")
+	EntityPrice               = Entity("PRICE")
+	EntityEmployee            = Entity("EMPLOYEE")
+	EntityContract            = Entity("CONTRACT")
+	EntityEmploymentAgreement = Entity("EMPLOYMENT_AGREEMENT")
+	EntityInvoiceBasis        = Entity("INVOICE_BASIS")
+	EntityInvoice             = Entity("INVOICE")
+	EntitySupplier            = Entity("SUPPLIER")
+	EntitySupplierInvoice     = Entity("SUPPLIER_INVOICE")
+	EntityTimeEntry           = Entity("TIME_ENTRY")
+	EntityEntrySeries         = Entity("ENTRY_SERIES")
+	EntityFiscalYear          = Entity("FISCAL_YEAR")
+	EntityAccountClass        = Entity("ACCOUNT_CLASS")
+	EntityAccountGroup        = Entity("ACCOUNT_GROUP")
+	EntityAccount             = Entity("ACCOUNT")
+	EntityTag                 = Entity("TAG")
+	EntityEntry               = Entity("ENTRY")
+	EntityEntryBasis          = Entity("ENTRY_BASIS")
+)
+
+type CodedError struct {
+	Message string
+	Code    Code
+	Entity  Entity
+	Params  map[string]string
+}
+
+func NewCodedError(message string, code Code, entity Entity) CodedError {
+	return CodedError{
+		Message: message,
+		Code:    code,
+		Entity:  entity,
+		Params:  make(map[string]string),
+	}
+}
+
+func (c CodedError) Error() string {
+	return c.Message
+}
+
+func (c CodedError) Is(err error) bool {
+	var e CodedError
+	if errors.As(err, &e) {
+		return c.Code == e.Code && c.Entity == e.Entity && c.Message == e.Message && mapEqual(c.Params, e.Params)
+	}
+	return false
+}
+
+func mapEqual(m1, m2 map[string]string) bool {
+	if len(m1) != len(m2) {
+		return false
+	}
+	for k1, v1 := range m1 {
+		v2, exists := m2[k1]
+		if !exists || v1 != v2 {
+			return false
+		}
+	}
+	return true
+}
+
+func (c CodedError) WithParam(key, value string) CodedError {
+	params := make(map[string]string)
+	for k, v := range c.Params {
+		params[k] = v
+	}
+	params[key] = value
+	return CodedError{
+		Message: c.Message,
+		Code:    c.Code,
+		Entity:  c.Entity,
+		Params:  params,
+	}
+}
+
+var _ error = CodedError{}