1package imapserver

2

3import (

4 "errors"

5 "fmt"

6)

7

8func xcheckf(err error, format string, args ...any) {

9 if err != nil {

10 xserverErrorf("%s: %w", fmt.Sprintf(format, args...), err)

11 }

12}

13

14type userError struct {

15 code string // Optional response code in brackets.

16 err error

17}

18

19func (e userError) Error() string { return e.err.Error() }

20func (e userError) Unwrap() error { return e.err }

21

22func xuserErrorf(format string, args ...any) {

23 panic(userError{err: fmt.Errorf(format, args...)})

24}

25

26func xusercodeErrorf(code, format string, args ...any) {

27 panic(userError{code: code, err: fmt.Errorf(format, args...)})

28}

29

30type serverError struct{ err error }

31

32func (e serverError) Error() string { return e.err.Error() }

33func (e serverError) Unwrap() error { return e.err }

34

35func xserverErrorf(format string, args ...any) {

36 panic(serverError{fmt.Errorf(format, args...)})

37}

38

39type syntaxError struct {

40 line string // Optional line to write before BAD result. For untagged response. CRLF will be added.

41 code string // Optional result code (between []) to write in BAD result.

42 errmsg string // BAD response message.

43 err error // Typically with same info as errmsg, but sometimes more.

44}

45

46func (e syntaxError) Error() string {

47 s := "bad syntax: " + e.errmsg

48 if e.code != "" {

49 s += " [" + e.code + "]"

50 }

51 return s

52}

53func (e syntaxError) Unwrap() error { return e.err }

54

55func xsyntaxErrorf(format string, args ...any) {

56 errmsg := fmt.Sprintf(format, args...)

57 err := errors.New(errmsg)

58 panic(syntaxError{"", "", errmsg, err})

59}

60