1 files changed, 80 insertions, 0 deletions
diff --git a/Software/Visual_Studio/Tango.Telemetry/Sources/TelemetryMachineUpdatesHistorySource.cs b/Software/Visual_Studio/Tango.Telemetry/Sources/TelemetryMachineUpdatesHistorySource.cs
new file mode 100644
index 000000000..0b78018e6
--- /dev/null
+++ b/Software/Visual_Studio/Tango.Telemetry/Sources/TelemetryMachineUpdatesHistorySource.cs
@@ -0,0 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Data.Entity;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Tango.BL;
+using Tango.BL.Entities;
+using Tango.BL.Enumerations;
+using Tango.Telemetry.Mappers;
+using Tango.Telemetry.Telemetries;
+
+namespace Tango.Telemetry.Sources
+{
+    public class TelemetryMachineUpdatesHistorySource : ITelemetryHistorySource
+    {
+        private bool _isBusy;
+
+        public TelemetryHistorySourceDirection Direction { get; } = TelemetryHistorySourceDirection.Descending;
+
+        public string Name { get; } = "Machine Updates History";
+
+        public bool RequiresTelemetryDuplicationTracking { get; } = true;
+
+        public async Task<bool> CanRequestHistory(DateTime from)
+        {
+            if (_isBusy)
+            {
+                return false;
+            }
+            else
+            {
+                try
+                {
+                    using (ObservablesContext db = ObservablesContext.CreateDefault())
+                    {
+                        return await db.TangoUpdates.CountAsync(x => x.LastUpdated < from) > 0;
+                    }
+                }
+                catch
+                {
+                    return false;
+                }
+            }
+        }
+
+        public async Task<IEnumerable<ITelemetry>> RequestHistory(DateTime from)
+        {
+            try
+            {
+                _isBusy = true;
+
+                using (ObservablesContext db = ObservablesContext.CreateDefault())
+                {
+                    int[] skipArr = { (int)TangoUpdateStatuses.SynchronizationCompleted, (int)TangoUpdateStatuses.SynchronizationFailed, (int)TangoUpdateStatuses.SynchronizationStarted };
+                    var updates = await db.TangoUpdates.Where(x => x.LastUpdated <= from && !skipArr.Contains(x.Status)).Take(10).ToListAsync();
+
+                    List<TelemetryMachineUpdate> tUpdates = new List<TelemetryMachineUpdate>();
+
+                    foreach (var update in updates)
+                    {
+                        TelemetryMachineUpdate tUpdate = MachineUpdateMapper.MapMachineUpdate(update);
+                        tUpdates.Add(tUpdate);
+                    }
+                     
+                    return tUpdates;
+                }
+            }
+            finally
+            {
+                _isBusy = false;
+            }
+        }
+
+        public void Dispose()
+        {
+
+        }
+    }
+}