Very early NOTIFY support, hopefully fix -password on Windows

cmd/yggmail/main.go

@@ -10,8 +10,8 @@ import (
 	"os"
 	"strings"
 	"sync"
+	"syscall"
 
-	"github.com/emersion/go-imap/server"
 	"github.com/emersion/go-sasl"
 	"github.com/emersion/go-smtp"
 	"golang.org/x/term"
@@ -86,13 +86,13 @@ func main() {
 	switch {
 	case password != nil && *password:
 		log.Println("Please enter your new password:")
-		password1, err := term.ReadPassword(0)
+		password1, err := term.ReadPassword(syscall.Stdin)
 		if err != nil {
 			panic(err)
 		}
 		fmt.Println()
 		log.Println("Please enter your new password again:")
-		password2, err := term.ReadPassword(0)
+		password2, err := term.ReadPassword(syscall.Stdin)
 		if err != nil {
 			panic(err)
 		}
@@ -127,31 +127,19 @@ func main() {
 	}
 
 	queues := smtpsender.NewQueues(cfg, log, transport, storage)
+	var notify *imapserver.IMAPNotify
 
-	go func() {
-		defer wg.Done()
+	imapBackend := &imapserver.Backend{
+		Log:     log,
+		Config:  cfg,
+		Storage: storage,
+	}
 
-		imapBackend := &imapserver.Backend{
-			Log:     log,
-			Config:  cfg,
-			Storage: storage,
-		}
-
-		imapServer := server.New(imapBackend)
-		imapServer.Addr = *imapaddr
-		imapServer.AllowInsecureAuth = true
-		imapServer.EnableAuth(sasl.Login, func(conn server.Conn) sasl.Server {
-			return sasl.NewLoginServer(func(username, password string) error {
-				_, err := imapBackend.Login(nil, username, password)
-				return err
-			})
-		})
-
-		log.Println("Listening for IMAP on:", imapServer.Addr)
-		if err := imapServer.ListenAndServe(); err != nil {
-			log.Fatal(err)
-		}
-	}()
+	_, notify, err = imapserver.NewIMAPServer(imapBackend, *imapaddr, true)
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Println("Listening for IMAP on:", *imapaddr)
 
 	go func() {
 		defer wg.Done()
@@ -162,6 +150,7 @@ func main() {
 			Config:  cfg,
 			Storage: storage,
 			Queues:  queues,
+			Notify:  notify,
 		}
 
 		localServer := smtp.NewServer(localBackend)
@@ -192,6 +181,7 @@ func main() {
 			Config:  cfg,
 			Storage: storage,
 			Queues:  queues,
+			Notify:  notify,
 		}
 
 		overlayServer := smtp.NewServer(overlayBackend)

internal/imapserver/backend.go

@@ -16,6 +16,7 @@ type Backend struct {
 	Config  *config.Config
 	Log     *log.Logger
 	Storage storage.Storage
+	Server  *IMAPServer
 }
 
 func (b *Backend) Login(conn *imap.ConnInfo, username, password string) (backend.User, error) {
@@ -38,6 +39,26 @@ func (b *Backend) Login(conn *imap.ConnInfo, username, password string) (backend
 	user := &User{
 		backend:  b,
 		username: username,
+		conn:     conn,
 	}
 	return user, nil
 }
+
+/*
+func (b *Backend) NotifyNew(id int) error {
+	b.Server.server.ForEachConn(func(conn server.Conn) {
+		notify := false
+		for _, cap := range conn.Capabilities() {
+			if cap == "NOTIFY" {
+				notify = true
+			}
+		}
+		if !notify {
+			return
+		}
+		conn.WaitReady()
+		conn.WriteResp()
+	})
+	return nil
+}
+*/

internal/imapserver/imap.go

@@ -1,8 +1,12 @@
 package imapserver
 
 import (
+	"log"
+	"os"
+
 	idle "github.com/emersion/go-imap-idle"
 	"github.com/emersion/go-imap/server"
+	"github.com/emersion/go-sasl"
 )
 
 type IMAPServer struct {
@@ -10,11 +14,27 @@ type IMAPServer struct {
 	backend *Backend
 }
 
-func NewIMAPServer(backend *Backend) (*IMAPServer, error) {
+func NewIMAPServer(backend *Backend, addr string, insecure bool) (*IMAPServer, *IMAPNotify, error) {
 	s := &IMAPServer{
 		server:  server.New(backend),
 		backend: backend,
 	}
+	notify := NewIMAPNotify(s.server, backend.Log)
+	s.server.Addr = addr
+	s.server.AllowInsecureAuth = insecure
+	s.server.Debug = os.Stdout
 	s.server.Enable(idle.NewExtension())
-	return s, nil
+	s.server.Enable(notify)
+	s.server.EnableAuth(sasl.Login, func(conn server.Conn) sasl.Server {
+		return sasl.NewLoginServer(func(username, password string) error {
+			_, err := s.backend.Login(nil, username, password)
+			return err
+		})
+	})
+	go func() {
+		if err := s.server.ListenAndServe(); err != nil {
+			log.Fatal(err)
+		}
+	}()
+	return s, notify, nil
 }

internal/imapserver/notify.go

@@ -0,0 +1,65 @@
+package imapserver
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/emersion/go-imap"
+	"github.com/emersion/go-imap/server"
+)
+
+type IMAPNotifyHandler struct {
+	imap.Command
+}
+
+func (h *IMAPNotifyHandler) Handle(conn server.Conn) error {
+	// TODO: Support setting NOTIFY subscriptions or not
+	return nil
+}
+
+type IMAPNotify struct {
+	server *server.Server
+	log    *log.Logger
+}
+
+func (ext *IMAPNotify) Capabilities(c server.Conn) []string {
+	if c.Context().State&imap.AuthenticatedState != 0 {
+		return []string{"NOTIFY"}
+	}
+	return nil
+}
+
+func (ext *IMAPNotify) Command(name string) server.HandlerFactory {
+	if name != "NOTIFY" {
+		return nil
+	}
+	return func() server.Handler {
+		return &IMAPNotifyHandler{}
+	}
+}
+
+func (ext *IMAPNotify) NotifyNew(id, count int) error {
+	ext.server.ForEachConn(func(c server.Conn) {
+		var resptype imap.StatusRespType
+		if mailbox := c.Context().Mailbox; mailbox != nil && mailbox.Name() == "INBOX" {
+			resptype = imap.StatusRespType(
+				fmt.Sprintf("EXISTS %d", id),
+			)
+		} else {
+			resptype = imap.StatusRespType(
+				fmt.Sprintf("STATUS INBOX (UIDNEXT %d MESSAGES %d)", id+1, count),
+			)
+		}
+		_ = c.WriteResp(&imap.StatusResp{
+			Type: resptype,
+		})
+	})
+	return nil
+}
+
+func NewIMAPNotify(s *server.Server, log *log.Logger) *IMAPNotify {
+	return &IMAPNotify{
+		server: s,
+		log:    log,
+	}
+}

internal/imapserver/user.go

@@ -5,12 +5,14 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/emersion/go-imap"
 	"github.com/emersion/go-imap/backend"
 )
 
 type User struct {
 	backend  *Backend
 	username string
+	conn     *imap.ConnInfo
 }
 
 func (u *User) Username() string {

internal/smtpserver/backend.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/emersion/go-smtp"
 	"github.com/neilalexander/yggmail/internal/config"
+	"github.com/neilalexander/yggmail/internal/imapserver"
 	"github.com/neilalexander/yggmail/internal/smtpsender"
 	"github.com/neilalexander/yggmail/internal/storage"
 	"github.com/neilalexander/yggmail/internal/utils"
@@ -25,6 +26,7 @@ type Backend struct {
 	Config  *config.Config
 	Queues  *smtpsender.Queues
 	Storage storage.Storage
+	Notify  *imapserver.IMAPNotify
 }
 
 func (b *Backend) Login(state *smtp.ConnectionState, username, password string) (smtp.Session, error) {

internal/smtpserver/session_remote.go

@@ -65,10 +65,17 @@ func (s *SessionRemote) Data(r io.Reader) error {
 		return fmt.Errorf("m.WriteTo: %w", err)
 	}
 
-	if _, err := s.backend.Storage.MailCreate("INBOX", b.Bytes()); err != nil {
+	if id, err := s.backend.Storage.MailCreate("INBOX", b.Bytes()); err != nil {
 		return fmt.Errorf("s.backend.Storage.StoreMessageFor: %w", err)
+	} else {
+		s.backend.Log.Printf("Stored new mail from %s", s.from)
+
+		if count, err := s.backend.Storage.MailCount("INBOX"); err == nil {
+			if err := s.backend.Notify.NotifyNew(id, count); err != nil {
+				s.backend.Log.Println("Failed to notify:", s.from)
+			}
+		}
 	}
-	s.backend.Log.Printf("Stored new mail from %s", s.from)
 
 	return nil
 }

internal/smtpserver/smtp.go

@@ -2,17 +2,20 @@ package smtpserver
 
 import (
 	"github.com/emersion/go-smtp"
+	"github.com/neilalexander/yggmail/internal/imapserver"
 )
 
 type SMTPServer struct {
 	server  *smtp.Server
 	backend smtp.Backend
+	notify  *imapserver.IMAPNotify
 }
 
-func NewSMTPServer(backend smtp.Backend) *SMTPServer {
+func NewSMTPServer(backend smtp.Backend, notify *imapserver.IMAPNotify) *SMTPServer {
 	s := &SMTPServer{
 		server:  smtp.NewServer(backend),
 		backend: backend,
+		notify:  notify,
 	}
 	return s
 }