1 files changed, 12 insertions, 0 deletions
diff --git a/BackEnd/Timeline/Services/BasicTimelineService.cs b/BackEnd/Timeline/Services/BasicTimelineService.cs
index 0d9f64a9..be500135 100644
--- a/BackEnd/Timeline/Services/BasicTimelineService.cs
+++ b/BackEnd/Timeline/Services/BasicTimelineService.cs
@@ -16,6 +16,13 @@ namespace Timeline.Services
     public interface IBasicTimelineService
     {
         /// <summary>
+        /// Check whether a timeline with given id exists without getting full info.
+        /// </summary>
+        /// <param name="id">The timeline id.</param>
+        /// <returns>True if exist. Otherwise false.</returns>
+        Task<bool> CheckExistence(long id);
+
+        /// <summary>
         /// Get the timeline id by name.
         /// </summary>
         /// <param name="timelineName">Timeline name.</param>
@@ -67,6 +74,11 @@ namespace Timeline.Services
             };
         }
 
+        public async Task<bool> CheckExistence(long id)
+        {
+            return await _database.Timelines.AnyAsync(t => t.Id == id);
+        }
+
         public async Task<long> GetTimelineIdByName(string timelineName)
         {
             if (timelineName == null)