✨ Add errors.Errorf

errorf.go

@@ -0,0 +1,61 @@
+package errors
+
+import "fmt"
+
+// Returns a ResponsableError formatted from the message, with the specified status.
+// Errorf passes the heavy lifting off to fmt.Errorf, and returns a similar error.
+// If one error is passed in the format, this will return an UnwrappableError.
+// If more than one error is passed in the format, this will return an UnwrappableErrors.
+func Errorf(status int, format string, parts ...any) ResponsableError {
+	err := fmt.Errorf(format, parts...)
+	msg := err.Error()
+	er := &erf{status, msg}
+	if we, ok := err.(wrappedError); ok {
+		return &wrapErr{er, we.Unwrap()}
+	}
+	if wes, ok := err.(wrappedErrors); ok {
+		return &wrapErrs{er, wes.Unwrap()}
+	}
+	return er
+}
+
+var _ ResponsableError = new(erf)
+
+type erf struct {
+	stat int
+	msg  string
+}
+
+func (e *erf) Status() int {
+	return e.stat
+}
+
+func (e *erf) Error() string {
+	return e.msg
+}
+
+func (e *erf) Msg() string {
+	return e.msg
+}
+
+var _ UnwrappableError = new(wrapErr)
+
+type wrapErr struct {
+	*erf
+	err error
+}
+
+func (e *wrapErr) Unwrap() error {
+	return e.err
+}
+
+var _ UnwrappableErrors = new(wrapErrs)
+
+type wrapErrs struct {
+	*erf
+	errs []error
+}
+
+func (e *wrapErrs) Unwrap() []error {
+	return e.errs
+}