feat: add new api services (#5619)

* feat: add new services

* improve demos and comments

* remove unused field

* add comment to demo proto calls

* Apply suggestions from code review

Co-authored-by: Silvan <silvan.reusser@gmail.com>

---------

Co-authored-by: Silvan <silvan.reusser@gmail.com>

internal/api/grpc/session/v2/server.go

@@ -0,0 +1,51 @@
+package session
+
+import (
+	"google.golang.org/grpc"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/internal/api/grpc/server"
+	"github.com/zitadel/zitadel/internal/command"
+	"github.com/zitadel/zitadel/internal/query"
+	"github.com/zitadel/zitadel/pkg/grpc/session/v2alpha"
+)
+
+var _ session.SessionServiceServer = (*Server)(nil)
+
+type Server struct {
+	session.UnimplementedSessionServiceServer
+	command *command.Commands
+	query   *query.Queries
+}
+
+type Config struct{}
+
+func CreateServer(
+	command *command.Commands,
+	query *query.Queries,
+) *Server {
+	return &Server{
+		command: command,
+		query:   query,
+	}
+}
+
+func (s *Server) RegisterServer(grpcServer *grpc.Server) {
+	session.RegisterSessionServiceServer(grpcServer, s)
+}
+
+func (s *Server) AppName() string {
+	return session.SessionService_ServiceDesc.ServiceName
+}
+
+func (s *Server) MethodPrefix() string {
+	return session.SessionService_ServiceDesc.ServiceName
+}
+
+func (s *Server) AuthMethods() authz.MethodMapping {
+	return session.SessionService_AuthMethods
+}
+
+func (s *Server) RegisterGateway() server.RegisterGatewayFunc {
+	return session.RegisterSessionServiceHandler
+}

internal/api/grpc/session/v2/session.go

@@ -0,0 +1,18 @@
+package session
+
+import (
+	"context"
+
+	"github.com/zitadel/zitadel/internal/api/authz"
+	"github.com/zitadel/zitadel/pkg/grpc/session/v2alpha"
+	"github.com/zitadel/zitadel/pkg/grpc/user/v2alpha"
+)
+
+func (s *Server) GetSession(ctx context.Context, req *session.GetSessionRequest) (*session.GetSessionResponse, error) {
+	return &session.GetSessionResponse{
+		Session: &session.Session{
+			Id:   req.Id,
+			User: &user.User{Id: authz.GetCtxData(ctx).UserID},
+		},
+	}, nil
+}