mox!

imapserver/error.go

@@ -0,0 +1,55 @@
+package imapserver
+
+import (
+	"fmt"
+)
+
+func xcheckf(err error, format string, args ...any) {
+	if err != nil {
+		xserverErrorf("%s: %w", fmt.Sprintf(format, args...), err)
+	}
+}
+
+type userError struct {
+	code string // Optional response code in brackets.
+	err  error
+}
+
+func (e userError) Error() string { return e.err.Error() }
+func (e userError) Unwrap() error { return e.err }
+
+func xuserErrorf(format string, args ...any) {
+	panic(userError{err: fmt.Errorf(format, args...)})
+}
+
+func xusercodeErrorf(code, format string, args ...any) {
+	panic(userError{code: code, err: fmt.Errorf(format, args...)})
+}
+
+type serverError struct{ err error }
+
+func (e serverError) Error() string { return e.err.Error() }
+func (e serverError) Unwrap() error { return e.err }
+
+func xserverErrorf(format string, args ...any) {
+	panic(serverError{fmt.Errorf(format, args...)})
+}
+
+type syntaxError struct {
+	line string // Optional line to write before BAD result. For untagged response. CRLF will be added.
+	code string // Optional result code (between []) to write in BAD result.
+	err  error  // BAD response message.
+}
+
+func (e syntaxError) Error() string {
+	s := "bad syntax: " + e.err.Error()
+	if e.code != "" {
+		s += " [" + e.code + "]"
+	}
+	return s
+}
+func (e syntaxError) Unwrap() error { return e.err }
+
+func xsyntaxErrorf(format string, args ...any) {
+	panic(syntaxError{"", "", fmt.Errorf(format, args...)})
+}