mirror of
https://github.com/ergochat/ergo.git
synced 2024-11-14 07:59:31 +01:00
139 lines
3.4 KiB
Go
139 lines
3.4 KiB
Go
// Copyright (c) 2012-2014 Jeremy Latt
|
|
// Copyright (c) 2016- Daniel Oaks <daniel@danieloaks.net>
|
|
// released under the MIT license
|
|
|
|
package irc
|
|
|
|
import (
|
|
"strings"
|
|
|
|
"github.com/DanielOaks/girc-go/ircmsg"
|
|
)
|
|
|
|
// Capabilities are optional features a client may request from a server.
|
|
type Capability string
|
|
|
|
const (
|
|
AccountTag Capability = "account-tag"
|
|
AwayNotify Capability = "away-notify"
|
|
ExtendedJoin Capability = "extended-join"
|
|
MultiPrefix Capability = "multi-prefix"
|
|
SASL Capability = "sasl"
|
|
ServerTime Capability = "server-time"
|
|
UserhostInNames Capability = "userhost-in-names"
|
|
)
|
|
|
|
var (
|
|
SupportedCapabilities = CapabilitySet{
|
|
AccountTag: true,
|
|
AwayNotify: true,
|
|
ExtendedJoin: true,
|
|
MultiPrefix: true,
|
|
SASL: true,
|
|
ServerTime: true,
|
|
UserhostInNames: true,
|
|
}
|
|
)
|
|
|
|
func (capability Capability) String() string {
|
|
return string(capability)
|
|
}
|
|
|
|
// CapModifiers are indicators showing the state of a capability after a REQ or
|
|
// ACK.
|
|
type CapModifier rune
|
|
|
|
const (
|
|
Ack CapModifier = '~'
|
|
Disable CapModifier = '-'
|
|
Sticky CapModifier = '='
|
|
)
|
|
|
|
func (mod CapModifier) String() string {
|
|
return string(mod)
|
|
}
|
|
|
|
type CapState uint
|
|
|
|
const (
|
|
CapNone CapState = iota
|
|
CapNegotiating CapState = iota
|
|
CapNegotiated CapState = iota
|
|
)
|
|
|
|
type CapabilitySet map[Capability]bool
|
|
|
|
func (set CapabilitySet) String() string {
|
|
strs := make([]string, len(set))
|
|
index := 0
|
|
for capability := range set {
|
|
strs[index] = string(capability)
|
|
index += 1
|
|
}
|
|
return strings.Join(strs, " ")
|
|
}
|
|
|
|
func (set CapabilitySet) DisableString() string {
|
|
parts := make([]string, len(set))
|
|
index := 0
|
|
for capability := range set {
|
|
parts[index] = Disable.String() + capability.String()
|
|
index += 1
|
|
}
|
|
return strings.Join(parts, " ")
|
|
}
|
|
|
|
// CAP <subcmd> [<caps>]
|
|
func capHandler(server *Server, client *Client, msg ircmsg.IrcMessage) bool {
|
|
subCommand := strings.ToUpper(msg.Params[0])
|
|
capabilities := make(CapabilitySet)
|
|
var capString string
|
|
|
|
if len(msg.Params) > 1 {
|
|
capString = msg.Params[1]
|
|
strs := strings.Split(capString, " ")
|
|
for _, str := range strs {
|
|
if len(str) > 0 {
|
|
capabilities[Capability(str)] = true
|
|
}
|
|
}
|
|
}
|
|
|
|
switch subCommand {
|
|
case "LS":
|
|
if !client.registered {
|
|
client.capState = CapNegotiating
|
|
}
|
|
// client.server needs to be here to workaround a parsing bug in weechat 1.4
|
|
// and let it connect to the server (otherwise it doesn't respond to the CAP
|
|
// message with anything and just hangs on connection)
|
|
client.Send(nil, server.nameString, "CAP", client.nickString, subCommand, SupportedCapabilities.String())
|
|
|
|
case "LIST":
|
|
client.Send(nil, server.nameString, "CAP", client.nickString, subCommand, client.capabilities.String())
|
|
|
|
case "REQ":
|
|
// make sure all capabilities actually exist
|
|
for capability := range capabilities {
|
|
if !SupportedCapabilities[capability] {
|
|
client.Send(nil, server.nameString, "CAP", client.nickString, "NAK", capString)
|
|
return false
|
|
}
|
|
}
|
|
for capability := range capabilities {
|
|
client.capabilities[capability] = true
|
|
}
|
|
client.Send(nil, server.nameString, "CAP", client.nickString, "ACK", capString)
|
|
|
|
case "END":
|
|
if !client.registered {
|
|
client.capState = CapNegotiated
|
|
server.tryRegister(client)
|
|
}
|
|
|
|
default:
|
|
client.Send(nil, server.nameString, ERR_INVALIDCAPCMD, client.nickString, subCommand, "Invalid CAP subcommand")
|
|
}
|
|
return false
|
|
}
|