add core/error/util files

pkg/errs/error.go

@@ -0,0 +1,73 @@
+package errs
+
+type ErrorCategory int
+
+const (
+	CATEGORY_SYSTEM ErrorCategory = 1
+	CATEGORY_NORMAL ErrorCategory = 2
+
+	SYSTEM_SUBCATEGORY_DEFAULT  = 0
+	SYSTEM_SUBCATEGORY_SETTING  = 1
+	SYSTEM_SUBCATEGORY_DATABASE = 2
+
+	NORMAL_SUBCATEGORY_GLOBAL    = 0
+	NORMAL_SUBCATEGORY_USER      = 1
+	NORMAL_SUBCATEGORY_TOKEN     = 2
+	NORMAL_SUBCATEGORY_TWOFACTOR = 3
+	NORMAL_SUBCATEGORY_ACCOUNT   = 4
+	NORMAL_SUBCATEGORY_JOURNAL   = 5
+	NORMAL_SUBCATEGORY_CATEGORY  = 6
+	NORMAL_SUBCATEGORY_TAG       = 7
+)
+
+type Error struct {
+	Category       ErrorCategory
+	SubCategory    int
+	Index          int
+	HttpStatusCode int
+	Message        string
+	BaseError      []error
+}
+
+func (err *Error) Error() string {
+	return err.Message
+}
+
+func (err *Error) Code() int {
+	return int(err.Category)*100000 + err.SubCategory*1000 + err.Index
+}
+
+func New(category ErrorCategory, subCategory int, index int, httpStatusCode int, message string, baseError ...error) *Error {
+	return &Error{
+		Category:       category,
+		SubCategory:    subCategory,
+		Index:          index,
+		HttpStatusCode: httpStatusCode,
+		Message:        message,
+		BaseError:      baseError,
+	}
+}
+
+func NewSystemError(subCategory int, index int, httpStatusCode int, message string) *Error {
+	return New(CATEGORY_SYSTEM, subCategory, index, httpStatusCode, message)
+}
+
+func NewNormalError(subCategory int, index int, httpStatusCode int, message string) *Error {
+	return New(CATEGORY_NORMAL, subCategory, index, httpStatusCode, message)
+}
+
+func NewIncompleteOrIncorrectSubmissionError(err error) *Error {
+	return New(ErrIncompleteOrIncorrectSubmission.Category,
+		ErrIncompleteOrIncorrectSubmission.SubCategory,
+		ErrIncompleteOrIncorrectSubmission.Index,
+		ErrIncompleteOrIncorrectSubmission.HttpStatusCode,
+		ErrIncompleteOrIncorrectSubmission.Message, err)
+}
+
+func Or(err error, defaultErr *Error) *Error {
+	if finalError, ok := err.(*Error); ok {
+		return finalError
+	} else {
+		return defaultErr
+	}
+}