mirror of
https://github.com/ergochat/ergo.git
synced 2024-11-14 07:59:31 +01:00
106 lines
2.6 KiB
Go
106 lines
2.6 KiB
Go
// Copyright (c) 2012-2014 Jeremy Latt
|
|
// Copyright (c) 2014-2015 Edmund Huber
|
|
// Copyright (c) 2016- Daniel Oaks <daniel@danieloaks.net>
|
|
// released under the MIT license
|
|
|
|
package irc
|
|
|
|
import (
|
|
"regexp"
|
|
"strings"
|
|
|
|
"golang.org/x/text/unicode/norm"
|
|
)
|
|
|
|
var (
|
|
// regexps
|
|
// these get replaced with real regexes at server load time
|
|
|
|
ChannelNameExpr = regexp.MustCompile("^$")
|
|
NicknameExpr = regexp.MustCompile("^$")
|
|
)
|
|
|
|
// Names are normalized and canonicalized to remove formatting marks
|
|
// and simplify usage. They are things like hostnames and usermasks.
|
|
type Name string
|
|
|
|
func NewName(str string) Name {
|
|
return Name(norm.NFKC.String(str))
|
|
}
|
|
|
|
func NewNames(strs []string) []Name {
|
|
names := make([]Name, len(strs))
|
|
for index, str := range strs {
|
|
names[index] = NewName(str)
|
|
}
|
|
return names
|
|
}
|
|
|
|
// tests
|
|
|
|
func (name Name) IsChannel() bool {
|
|
return ChannelNameExpr.MatchString(name.String())
|
|
}
|
|
|
|
func (name Name) IsNickname() bool {
|
|
namestr := name.String()
|
|
// * is used for unregistered clients
|
|
// * is used for mask matching
|
|
// ? is used for mask matching
|
|
// . is used to denote server names
|
|
// , is used as a separator by the protocol
|
|
// ! separates username from nickname
|
|
// @ separates nick+user from hostname
|
|
// # is a channel prefix
|
|
// @+ are channel membership prefixes
|
|
// - is typically disallowed from first char of nicknames
|
|
// nicknames can't start with digits
|
|
if strings.Contains(namestr, "*") || strings.Contains(namestr, "?") ||
|
|
strings.Contains(namestr, ".") || strings.Contains(namestr, ",") ||
|
|
strings.Contains(namestr, "!") || strings.Contains(namestr, "@") ||
|
|
strings.Contains("#@+-1234567890", string(namestr[0])) {
|
|
return false
|
|
}
|
|
// names that look like hostnames are restricted to servers, as with other ircds
|
|
if IsHostname(namestr) {
|
|
return false
|
|
}
|
|
return NicknameExpr.MatchString(namestr)
|
|
}
|
|
|
|
// conversions
|
|
|
|
func (name Name) String() string {
|
|
return string(name)
|
|
}
|
|
|
|
func (name Name) ToLower() Name {
|
|
return Name(strings.ToLower(name.String()))
|
|
}
|
|
|
|
// It's safe to coerce a Name to Text. Name is a strict subset of Text.
|
|
func (name Name) Text() Text {
|
|
return Text(name)
|
|
}
|
|
|
|
// Text is PRIVMSG, NOTICE, or TOPIC data. It's canonicalized UTF8
|
|
// data to simplify but keeps all formatting.
|
|
type Text string
|
|
|
|
func NewText(str string) Text {
|
|
return Text(norm.NFC.String(str))
|
|
}
|
|
|
|
func (text Text) String() string {
|
|
return string(text)
|
|
}
|
|
|
|
// CTCPText is text suitably escaped for CTCP.
|
|
type CTCPText string
|
|
|
|
var ctcpEscaper = strings.NewReplacer("\x00", "\x200", "\n", "\x20n", "\r", "\x20r")
|
|
|
|
func NewCTCPText(str string) CTCPText {
|
|
return CTCPText(ctcpEscaper.Replace(str))
|
|
}
|