initial commit

error.go

@@ -0,0 +1,50 @@
+package sqaffold
+
+import "net/http"
+
+var (
+	ErrNoRows = NewError(http.StatusNotFound, "no rows", nil)
+)
+
+type Error struct {
+	StatusCode int
+	Text       string
+
+	Previous error
+}
+
+func (e *Error) Error() string {
+	return e.Text
+}
+
+func (e *Error) Is(target error) bool {
+	if other, ok := target.(*Error); ok {
+		if other.StatusCode > 0 {
+			if e.StatusCode != other.StatusCode {
+				return false
+			}
+		}
+
+		if other.Text != "" {
+			if e.Text != other.Text {
+				return false
+			}
+		}
+	}
+
+	return true
+}
+
+func Err(err error) *Error {
+	return NewError(http.StatusInternalServerError, err.Error(), err)
+}
+
+func NewError(statusCode int, text string, previous error) *Error {
+	err := &Error{
+		StatusCode: statusCode,
+		Text:       text,
+		Previous:   previous,
+	}
+
+	return err
+}