mirror of https://github.com/ergochat/ergo.git
81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
// Copyright (c) 2012-2014 Jeremy Latt
|
|
// Copyright (c) 2014-2015 Edmund Huber
|
|
// Copyright (c) 2016-2017 Daniel Oaks <daniel@danieloaks.net>
|
|
// released under the MIT license
|
|
|
|
package irc
|
|
|
|
import (
|
|
"errors"
|
|
"strings"
|
|
|
|
"golang.org/x/text/secure/precis"
|
|
)
|
|
|
|
const (
|
|
casemappingName = "rfc7613"
|
|
)
|
|
|
|
var (
|
|
errInvalidCharacter = errors.New("Invalid character")
|
|
errEmpty = errors.New("String is empty")
|
|
)
|
|
|
|
// Casefold returns a casefolded string, without doing any name or channel character checks.
|
|
func Casefold(str string) (string, error) {
|
|
return precis.UsernameCaseMapped.CompareKey(str)
|
|
}
|
|
|
|
// CasefoldChannel returns a casefolded version of a channel name.
|
|
func CasefoldChannel(name string) (string, error) {
|
|
lowered, err := Casefold(name)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
} else if len(lowered) == 0 {
|
|
return "", errEmpty
|
|
}
|
|
|
|
if lowered[0] != '#' {
|
|
return "", errInvalidCharacter
|
|
}
|
|
|
|
// space can't be used
|
|
// , is used as a separator
|
|
// * is used in mask matching
|
|
// ? is used in mask matching
|
|
if strings.ContainsAny(lowered, " ,*?") {
|
|
return "", errInvalidCharacter
|
|
}
|
|
|
|
return lowered, err
|
|
}
|
|
|
|
// CasefoldName returns a casefolded version of a nick/user name.
|
|
func CasefoldName(name string) (string, error) {
|
|
lowered, err := Casefold(name)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
} else if len(lowered) == 0 {
|
|
return "", errEmpty
|
|
}
|
|
|
|
// space can't be used
|
|
// , is used as a separator
|
|
// * is used in mask matching
|
|
// ? is used in mask matching
|
|
// . denotes a server name
|
|
// ! separates nickname from username
|
|
// @ separates username from hostname
|
|
// : means trailing
|
|
// # is a channel prefix
|
|
// ~&@%+ are channel membership prefixes
|
|
// - I feel like disallowing
|
|
if strings.ContainsAny(lowered, " ,*?.!@:") || strings.ContainsAny(string(lowered[0]), "#~&@%+-") {
|
|
return "", errInvalidCharacter
|
|
}
|
|
|
|
return lowered, err
|
|
}
|