chore: update list memos request

api/v2/common.go

@@ -2,6 +2,10 @@ package v2
 
 import (
 	"context"
+	"encoding/base64"
+
+	"github.com/pkg/errors"
+	"google.golang.org/protobuf/proto"
 
 	apiv2pb "github.com/usememos/memos/proto/gen/api/v2"
 	"github.com/usememos/memos/store"
@@ -42,3 +46,29 @@ func getCurrentUser(ctx context.Context, s *store.Store) (*store.User, error) {
 	}
 	return user, nil
 }
+
+func getPageToken(limit int, offset int) (string, error) {
+	return marshalPageToken(&apiv2pb.PageToken{
+		Limit:  int32(limit),
+		Offset: int32(offset),
+	})
+}
+
+func marshalPageToken(pageToken *apiv2pb.PageToken) (string, error) {
+	b, err := proto.Marshal(pageToken)
+	if err != nil {
+		return "", errors.Wrapf(err, "failed to marshal page token")
+	}
+	return base64.StdEncoding.EncodeToString(b), nil
+}
+
+func unmarshalPageToken(s string, pageToken *apiv2pb.PageToken) error {
+	b, err := base64.StdEncoding.DecodeString(s)
+	if err != nil {
+		return errors.Wrapf(err, "failed to decode page token")
+	}
+	if err := proto.Unmarshal(b, pageToken); err != nil {
+		return errors.Wrapf(err, "failed to unmarshal page token")
+	}
+	return nil
+}