submissions: count recent operations

pkg/datastore/datastore.go

@@ -45,6 +45,7 @@ type Operations interface {
 	Create(ctx context.Context, smap model.Operation) (model.Operation, error)
 	Update(ctx context.Context, id int32, values OptionalMap) error
 	Delete(ctx context.Context, id int32) error
+	CountSince(ctx context.Context, owner int64, since int64) (int64, error)
 }
 
 type Submissions interface {

pkg/datastore/gormstore/operations.go

@@ -53,3 +53,12 @@ func (env *Operations) Delete(ctx context.Context, id int32) error {
 
 	return nil
 }
+
+func (env *Operations) CountSince(ctx context.Context, owner int64, since int64) (int64, error) {
+	var count int64
+	if err := env.db.Where("owner = ? AND created_at > ?",owner,since).Count(&count).Error; err != nil {
+		return count, err
+	}
+
+	return count, nil
+}