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noot

This commit is contained in:
a 2024-05-15 04:28:02 -05:00
parent 694e03ae13
commit 8590ce7d78
Signed by: a
GPG Key ID: 374BC539FE795AF0
12 changed files with 394 additions and 98 deletions
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61
cmd/lain/main.go
View File

@ -7,59 +7,72 @@ import (
"os"
"time"
"tuxpa.in/a/irc/plugins/caps/ircmw"
_ "github.com/joho/godotenv/autoload"
"github.com/lmittmann/tint"
"go.uber.org/fx"
"go.uber.org/fx/fxevent"
"tuxpa.in/a/irc/pkg/capability"
"tuxpa.in/a/irc/pkg/capability/cap_servertime"
"tuxpa.in/a/irc/pkg/ircconn"
"tuxpa.in/a/irc/pkg/ircv3"
"tuxpa.in/a/irc/plugins/auth"
"tuxpa.in/a/irc/plugins/useful"
"tuxpa.in/a/irc/src/lainbot"
)
func exec(log *slog.Logger) error {
tlsConfig := &tls.Config{}
conn, err := tls.Dial("tcp", "irc.libera.chat:6697", tlsConfig)
conn, err := tls.Dial("tcp", "put.gay:6697", tlsConfig)
//conn, err := net.Dial("tcp", "irc.libera.chat:6667")
if err != nil {
return err
}
irc := ircconn.New(log, conn, conn)
if err != nil {
return err
}
ctx := context.Background()
name := os.Getenv("LAIN_NICKNAME")
saslPassword := os.Getenv("LAIN_PASSWORD")
c := &ircmw.Capabilities{}
reg := &capability.Registrar{}
reg.Enable(&cap_servertime.Capability{})
instance := &lainbot.Instance{
Nuh: &ircv3.NUH{
Name: name,
User: "lain",
Host: "wired",
},
}
reg.Enable(&auth.SaslPlain{
Username: name,
Password: saslPassword,
})
reg.Enable(&auth.Nick{Nick: name})
reg.Enable(&auth.User{Username: "lain", Realname: "lain a", Hostname: "wired", Server: "wired"})
handler := ircv3.Chain(
func(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
log.Info("in <<", "msg", m.String())
next.Handle(ctx, w, m)
return ircv3.HandlerFunc(func(w ircv3.MessageWriter, e *ircv3.Event) {
log.Info("in <<", "msg", e.Msg.String())
next.Handle(w, e)
})
},
c.Middleware,
(&auth.SaslPlain{
Username: name,
Password: saslPassword,
}).Middleware,
(&auth.Nick{Nick: name}).Middleware,
(&auth.User{Username: "lain", Realname: "lain a", Hostname: "wired", Server: "wired"}).Middleware,
ircmw.CapabilityServerTime,
reg.NewMiddleware(),
(&useful.Autojoin{Channels: []string{"#lainmaxxing"}}).Middleware,
(&useful.Pong{}).Middleware,
).Handler(ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
}))
err = irc.Serve(ctx, handler)
func(h ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(w ircv3.MessageWriter, e *ircv3.Event) {
if e.Type != ircv3.EventTypeIRC {
return
}
h.Handle(w, e)
})
},
).Handler(instance)
mw := &ircconn.MessageWriter{R: conn, Log: log}
err = ircconn.Serve(ctx, conn, mw, handler)
if err != nil {
return err
}
return nil
}
func main() {

46
pkg/capability/cap_servertime/capability.go Normal file
View File

@ -0,0 +1,46 @@
package cap_servertime
import (
"strings"
"tuxpa.in/a/irc/pkg/ircv3"
)
type Capability struct {
supported bool
}
func (c *Capability) Middleware(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(w ircv3.MessageWriter, e *ircv3.Event) {
if c.supported {
// tString := e.Msg.Tags.Get("time")
// if tString != "" {
// parsedTime, err := time.Parse("2006-01-02T15:04:05.000Z", tString)
// if err == nil {
// ctx = context.WithValue(ctx, keyServerTime, parsedTime)
// }
// }
}
next.Handle(w, e)
})
}
func (c *Capability) Handle(w ircv3.MessageWriter, e *ircv3.Event) bool {
// dont have the capability? nothing to do. registered.
if e.Msg.Command == "CAP" && e.Msg.Param(0) == "*" && e.Msg.Param(1) == "LS" {
for _, v := range strings.Fields(e.Msg.Param(2)) {
if v == "server-time" {
w.WriteMessage(ircv3.NewMessage("CAP", "REQ", "server-time"))
return true
}
}
}
if e.Msg.Command == "CAP" && e.Msg.Param(2) == "server-time" {
if e.Msg.Param(1) == "ACK" {
c.supported = true
} else {
c.supported = false
}
}
return false
}

109
pkg/capability/capabilities.go Normal file
View File

@ -0,0 +1,109 @@
package capability
import (
"context"
"strings"
"tuxpa.in/a/irc/pkg/ircv3"
)
var registrarKey struct{}
type Capability interface {
Handle(w ircv3.MessageWriter, e *ircv3.Event) bool
Middleware(next ircv3.Handler) ircv3.Handler
}
type Registrar struct {
enabled []Capability
discovered []string
negotiating int
}
func (cs *Registrar) Enable(c Capability) error {
cs.enabled = append(cs.enabled, c)
return nil
}
func (cs *Registrar) NewMiddleware() func(next ircv3.Handler) ircv3.Handler {
waiting := map[Capability]struct{}{}
for _, v := range cs.enabled {
waiting[v] = struct{}{}
}
return func(next ircv3.Handler) ircv3.Handler {
cur := next
for _, v := range cs.enabled {
cur = v.Middleware(next)
}
return ircv3.HandlerFunc(func(w ircv3.MessageWriter, e *ircv3.Event) {
e = e.WithContext(context.WithValue(e.Context(), registrarKey, *cs))
// reset signal, set negotiating to 1
if e.Type == ircv3.EventTypeCONTROL && e.Msg.Command == "/EVENT_ON_SERVE" {
for k := range waiting {
delete(waiting, k)
}
for _, v := range cs.enabled {
waiting[v] = struct{}{}
}
cs.negotiating = 1
cs.discovered = nil
}
// done negotiating, so run the handle middleware
if cs.negotiating == 4 {
cur.Handle(w, e)
return
}
// increase negotiating stage when receive the CAP * LS response
if cs.negotiating == 2 && e.Msg.Command == "CAP" && e.Msg.Param(0) == "*" && e.Msg.Param(1) == "LS" {
for _, v := range strings.Fields(e.Msg.Param(2)) {
cs.discovered = append(cs.discovered, v)
}
cs.negotiating = 3
}
if e.Type == ircv3.EventTypeCONTROL && e.Msg.Command == "/EVENT_ON_SERVE" {
w.WriteMessage(ircv3.NewMessage("CAP", "LS", "302"))
cs.negotiating = 2
}
// run all negotiation handlers
// this allows sasl auth to happen before CAP LS happens.
for v := range waiting {
ready := v.Handle(w, e)
if ready {
delete(waiting, v)
}
}
// not done negotiating yet, so dont run handler middleware
next.Handle(w, e)
if cs.negotiating == 3 && len(waiting) == 0 {
cs.negotiating = 4
w.WriteMessage(ircv3.NewMessage("CAP", "END"))
}
})
}
}
func NegotiatingState(ctx context.Context) int {
val, ok := ctx.Value(registrarKey).(*Registrar)
if !ok {
return 0
}
return val.negotiating
}
func IsDoneNegotiating(ctx context.Context) bool {
return NegotiatingState(ctx) >= 3
}
func HasCapability(ctx context.Context, c string) bool {
val, ok := ctx.Value(registrarKey).(*Registrar)
if !ok {
return false
}
for _, v := range val.discovered {
if v == c {
return true
}
}
return false
}

30
pkg/ircclient/client.go Normal file
View File

@ -0,0 +1,30 @@
package ircclient
import (
"context"
"io"
"tuxpa.in/a/irc/pkg/ircconn"
"tuxpa.in/a/irc/pkg/ircv3"
)
type Client struct {
}
func (r *Client) Connect(ctx context.Context,
Connector func() (io.Writer, io.Reader, error),
h ircv3.Handler) error {
wr, rd, err := Connector()
if err != nil {
return err
}
irc := ircconn.New(wr, rd)
if err != nil {
return err
}
err = irc.Serve(ctx, h)
if err != nil {
return err
}
return nil
}

36
pkg/ircconn/conn.go
View File

@ -15,25 +15,21 @@ import (
type Conn struct {
w io.Writer
r io.Reader
log *slog.Logger
muWrite sync.Mutex
}
func New(log *slog.Logger, w io.Writer, r io.Reader) *Conn {
func New(w io.Writer, r io.Reader) *Conn {
return &Conn{
log: log,
w: w,
r: r,
w: w,
r: r,
}
}
// while serve is running, the conn owns the reader.
func (c *Conn) Serve(ctx context.Context, h ircv3.Handler) error {
// once serve is called, we call with an empty message.
h.Handle(ctx, c, &ircv3.Message{})
func Serve(ctx context.Context, r io.Reader, wr ircv3.MessageWriter, h ircv3.Handler) error {
h.Handle(wr, ircv3.NewEvent(ctx, ircv3.EventTypeCONTROL, ircv3.NewMessage("/EVENT_ON_SERVE")))
dec := &ircdecoder.Decoder{}
r := c.r
r = bufio.NewReaderSize(c.r, 10240)
r = bufio.NewReaderSize(r, 10240)
for {
select {
case <-ctx.Done():
@ -46,22 +42,30 @@ func (c *Conn) Serve(ctx context.Context, h ircv3.Handler) error {
if err != nil {
return err
}
h.Handle(ctx, c, msg)
h.Handle(wr, ircv3.NewEvent(ctx, ircv3.EventTypeIRC, msg))
}
}
func (c *Conn) WriteMessage(msg *ircv3.Message) error {
type MessageWriter struct {
R io.Writer
Log *slog.Logger
mu sync.Mutex
}
func (r *MessageWriter) WriteMessage(msg *ircv3.Message) error {
b := bytebufferpool.Get()
defer bytebufferpool.Put(b)
err := msg.Encode(b)
if err != nil {
return err
}
if r.Log != nil {
r.Log.Info("out >", "msg", msg.String())
}
b.WriteString("\r\n")
c.muWrite.Lock()
defer c.muWrite.Unlock()
c.log.Info("out >", "msg", msg.String())
_, err = b.WriteTo(c.w)
r.mu.Lock()
defer r.mu.Unlock()
_, err = r.R.Write(b.B)
if err != nil {
return err
}

36
pkg/ircv3/event.go Normal file
View File

@ -0,0 +1,36 @@
package ircv3
import "context"
type EventType = string
const (
EventTypeIRC EventType = "irc"
EventTypeCONTROL EventType = "control"
)
type Event struct {
Type EventType
Msg *Message
ctx context.Context
}
func NewEvent(ctx context.Context, t EventType, msg *Message) *Event {
return &Event{
ctx: ctx,
Msg: msg,
Type: t,
}
}
func (e *Event) Context() context.Context {
return e.ctx
}
func (e *Event) WithContext(ctx context.Context) *Event {
return &Event{
Msg: e.Msg,
Type: e.Type,
ctx: ctx,
}
}

16
pkg/ircv3/handler.go
View File

@ -1,16 +1,12 @@
package ircv3
import (
"context"
)
type Handler interface {
Handle(ctx context.Context, w MessageWriter, m *Message)
Handle(w MessageWriter, m *Event)
}
type HandlerFunc func(ctx context.Context, w MessageWriter, m *Message)
type HandlerFunc func(w MessageWriter, e *Event)
func (h HandlerFunc) Handle(ctx context.Context, w MessageWriter, m *Message) {
h(ctx, w, m)
func (h HandlerFunc) Handle(w MessageWriter, e *Event) {
h(w, e)
}
type MessageWriter interface {
@ -46,8 +42,8 @@ type ChainHandler struct {
Middlewares Middlewares
}
func (c *ChainHandler) Handle(ctx context.Context, w MessageWriter, m *Message) {
c.chain.Handle(ctx, w, m)
func (c *ChainHandler) Handle(w MessageWriter, e *Event) {
c.chain.Handle(w, e)
}
// chain builds a http.Handler composed of an inline middleware stack and endpoint

10
pkg/ircv3/message.go
View File

@ -25,6 +25,7 @@ func (m *Message) SetSource(nuh *NUH) *Message {
m.Source = nuh
return m
}
func (m *Message) Param(i int) string {
if len(m.Params) > i {
return m.Params[i]
@ -52,6 +53,9 @@ func (msg *Message) Encode(w io.Writer) error {
}
}
if msg.Source != nil {
if _, err := w.Write([]byte(":")); err != nil {
return err
}
if _, err := w.Write([]byte(msg.Source.String())); err != nil {
return err
}
@ -63,8 +67,10 @@ func (msg *Message) Encode(w io.Writer) error {
if _, err := w.Write([]byte(msg.Command)); err != nil {
return err
}
if _, err := w.Write([]byte(" ")); err != nil {
return err
if len(msg.Params) > 0 {
if _, err := w.Write([]byte(" ")); err != nil {
return err
}
}
for idx, v := range msg.Params {
if idx != 0 {

80
plugins/auth/auth.go
View File

@ -1,9 +1,7 @@
package auth
import (
"context"
"encoding/base64"
"tuxpa.in/a/irc/plugins/caps/ircmw"
"tuxpa.in/a/irc/pkg/ircv3"
)
@ -13,28 +11,33 @@ type SaslPlain struct {
Password string
}
func (saslplain *SaslPlain) Middleware(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
if m.Command == "" {
ircmw.AddPending(ctx, 1)
w.WriteMessage(ircv3.NewMessage("CAP", "REQ", "sasl"))
}
if m.Command == "CAP" && m.Param(0) == "*" && m.Param(1) == "ACK" && m.Param(2) == "sasl" {
w.WriteMessage(ircv3.NewMessage("AUTHENTICATE", "PLAIN"))
}
if m.Command == "AUTHENTICATE" && m.Param(0) == "+" {
w.WriteMessage(ircv3.NewMessage("AUTHENTICATE", base64.StdEncoding.EncodeToString([]byte(
func (saslplain *SaslPlain) Handle(w ircv3.MessageWriter, e *ircv3.Event) bool {
if e.Type == ircv3.EventTypeCONTROL && e.Msg.Command == "/EVENT_ON_SERVE" {
w.WriteMessage(ircv3.NewMessage("CAP", "REQ", "sasl"))
return false
}
m, _ := e.Msg, e.Context()
if m.Command == "CAP" && m.Param(0) == "*" && m.Param(1) == "ACK" && m.Param(2) == "sasl" {
w.WriteMessage(ircv3.NewMessage("AUTHENTICATE", "PLAIN"))
return false
}
if m.Command == "AUTHENTICATE" && m.Param(0) == "+" {
w.WriteMessage(ircv3.NewMessage("AUTHENTICATE", base64.StdEncoding.EncodeToString([]byte(
saslplain.Username+string([]byte{0})+
saslplain.Username+string([]byte{0})+
saslplain.Username+string([]byte{0})+
saslplain.Password,
))))
}
switch m.Command {
case "903", "904", "905", "906", "907":
ircmw.AddPending(ctx, -1)
}
next.Handle(ctx, w, m)
})
saslplain.Password,
))))
return false
}
switch m.Command {
case "903", "904", "905", "906", "907":
return true
}
return false
}
func (saslplain *SaslPlain) Middleware(next ircv3.Handler) ircv3.Handler {
// nothing to do
return next
}
type User struct {
@ -44,24 +47,29 @@ type User struct {
Server string
}
func (u *User) Handle(w ircv3.MessageWriter, e *ircv3.Event) bool {
if e.Type == ircv3.EventTypeCONTROL && e.Msg.Command == "/EVENT_ON_SERVE" {
w.WriteMessage(ircv3.NewMessage("USER", u.Username, u.Hostname, u.Server, u.Realname))
}
return true
}
func (u *User) Middleware(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
if m.Command == "" {
w.WriteMessage(ircv3.NewMessage("USER", u.Username, u.Hostname, u.Server, u.Realname))
}
next.Handle(ctx, w, m)
})
// nothing to do
return next
}
type Nick struct {
Nick string
}
func (u *Nick) Middleware(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
if m.Command == "" {
w.WriteMessage(ircv3.NewMessage("NICK", u.Nick))
}
next.Handle(ctx, w, m)
})
func (u *Nick) Handle(w ircv3.MessageWriter, e *ircv3.Event) bool {
if e.Type == ircv3.EventTypeCONTROL && e.Msg.Command == "/EVENT_ON_SERVE" {
w.WriteMessage(ircv3.NewMessage("NICK", u.Nick))
}
return true
}
func (u *Nick) Middleware(next ircv3.Handler) ircv3.Handler {
return next
}

7
plugins/useful/channels.go
View File

@ -1,7 +1,6 @@
package useful
import (
"context"
"strings"
"tuxpa.in/a/irc/pkg/ircv3"
@ -12,10 +11,10 @@ type Autojoin struct {
}
func (u *Autojoin) Middleware(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
if m.Command == "005" {
return ircv3.HandlerFunc(func(w ircv3.MessageWriter, e *ircv3.Event) {
if e.Msg.Command == "005" {
w.WriteMessage(ircv3.NewMessage("JOIN", strings.Join(u.Channels, ",")))
}
next.Handle(ctx, w, m)
next.Handle(w, e)
})
}

10
plugins/useful/pong.go
View File

@ -1,8 +1,6 @@
package useful
import (
"context"
"tuxpa.in/a/irc/pkg/ircv3"
)
@ -10,10 +8,10 @@ type Pong struct {
}
func (u *Pong) Middleware(next ircv3.Handler) ircv3.Handler {
return ircv3.HandlerFunc(func(ctx context.Context, w ircv3.MessageWriter, m *ircv3.Message) {
if m.Command == "PING" {
w.WriteMessage(ircv3.NewMessage("PONG", m.Param(0)))
return ircv3.HandlerFunc(func(w ircv3.MessageWriter, e *ircv3.Event) {
if e.Msg.Command == "PING" {
w.WriteMessage(ircv3.NewMessage("PONG", e.Msg.Param(0)))
}
next.Handle(ctx, w, m)
next.Handle(w, e)
})
}

51
src/lainbot/lainbot.go Normal file
View File

@ -0,0 +1,51 @@
package lainbot
import (
"strings"
"tuxpa.in/a/irc/pkg/ircv3"
)
type Instance struct {
Nuh *ircv3.NUH
}
type messageWriter struct {
mw ircv3.MessageWriter
nuh *ircv3.NUH
}
func (messagewriter *messageWriter) WriteMessage(msg *ircv3.Message) error {
if msg.Command == "PRIVMSG" {
msg.SetSource(messagewriter.nuh)
}
return messagewriter.mw.WriteMessage(msg)
}
func (instance *Instance) Handle(w ircv3.MessageWriter, e *ircv3.Event) {
instance.handle(&messageWriter{mw: w, nuh: instance.Nuh}, e)
}
func (instance *Instance) handle(w ircv3.MessageWriter, e *ircv3.Event) {
m := e.Msg
if m.Command != "PRIVMSG" {
return
}
if m.Param(0) != "#lainmaxxing" {
return
}
messageContent := m.Param(1)
if strings.HasPrefix(messageContent, "!") {
instance.handle(w, e)
}
return
}
func (instance *Instance) handleCommand(w ircv3.MessageWriter, e *ircv3.Event) {
m := e.Msg
messageContent := m.Param(1)
if messageContent == "!ping" {
w.WriteMessage(ircv3.NewMessage("PRIVMSG", m.Param(0), "pong"))
return
}
return
}