GODT-1779: Remove go-imap

internal/focus/service.go

@@ -0,0 +1,60 @@
+package focus
+
+import (
+	"context"
+	"fmt"
+	"net"
+
+	"github.com/ProtonMail/proton-bridge/v2/internal/focus/proto"
+	"google.golang.org/grpc"
+	"google.golang.org/protobuf/types/known/emptypb"
+)
+
+const (
+	Host = "127.0.0.1"
+	Port = 1042
+)
+
+type FocusService struct {
+	proto.UnimplementedFocusServer
+
+	server   *grpc.Server
+	listener net.Listener
+	raiseCh  chan struct{}
+}
+
+func NewService() (*FocusService, error) {
+	listener, err := net.Listen("tcp", net.JoinHostPort(Host, fmt.Sprint(Port)))
+	if err != nil {
+		return nil, fmt.Errorf("failed to listen: %w", err)
+	}
+
+	service := &FocusService{
+		server:   grpc.NewServer(),
+		listener: listener,
+		raiseCh:  make(chan struct{}, 1),
+	}
+
+	proto.RegisterFocusServer(service.server, service)
+
+	go func() {
+		if err := service.server.Serve(listener); err != nil {
+			fmt.Printf("failed to serve: %v", err)
+		}
+	}()
+
+	return service, nil
+}
+
+func (service *FocusService) Raise(context.Context, *emptypb.Empty) (*emptypb.Empty, error) {
+	service.raiseCh <- struct{}{}
+	return &emptypb.Empty{}, nil
+}
+
+func (service *FocusService) GetRaiseCh() <-chan struct{} {
+	return service.raiseCh
+}
+
+func (service *FocusService) Close() {
+	service.server.Stop()
+}