This is the v1 version, had the v2 before.

server/cmd_any.go

@@ -0,0 +1,52 @@
+package server
+
+import (
+	"github.com/emersion/go-imap"
+	"github.com/emersion/go-imap/backend"
+	"github.com/emersion/go-imap/commands"
+	"github.com/emersion/go-imap/responses"
+)
+
+type Capability struct {
+	commands.Capability
+}
+
+func (cmd *Capability) Handle(conn Conn) error {
+	res := &responses.Capability{Caps: conn.Capabilities()}
+	return conn.WriteResp(res)
+}
+
+type Noop struct {
+	commands.Noop
+}
+
+func (cmd *Noop) Handle(conn Conn) error {
+	ctx := conn.Context()
+	if ctx.Mailbox != nil {
+		// If a mailbox is selected, NOOP can be used to poll for server updates
+		if mbox, ok := ctx.Mailbox.(backend.MailboxPoller); ok {
+			return mbox.Poll()
+		}
+	}
+
+	return nil
+}
+
+type Logout struct {
+	commands.Logout
+}
+
+func (cmd *Logout) Handle(conn Conn) error {
+	res := &imap.StatusResp{
+		Type: imap.StatusRespBye,
+		Info: "Closing connection",
+	}
+
+	if err := conn.WriteResp(res); err != nil {
+		return err
+	}
+
+	// Request to close the connection
+	conn.Context().State = imap.LogoutState
+	return nil
+}