Telemetry Logs & Events.

1 files changed, 79 insertions, 0 deletions

diff --git a/Software/Visual_Studio/Tango.Telemetry/Sources/TelemetryEventsHistorySource.cs b/Software/Visual_Studio/Tango.Telemetry/Sources/TelemetryEventsHistorySource.cs
new file mode 100644
index 000000000..57abee66b
--- /dev/null
+++ b/Software/Visual_Studio/Tango.Telemetry/Sources/TelemetryEventsHistorySource.cs
@@ -0,0 +1,79 @@
+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.Telemetry.Mappers;
+using Tango.Telemetry.Telemetries;
+
+namespace Tango.Telemetry.Sources
+{
+    public class TelemetryEventsHistorySource : ITelemetryHistorySource
+    {
+        private bool _isBusy;
+
+        public TelemetryHistorySourceDirection Direction { get; } = TelemetryHistorySourceDirection.Descending;
+        public string Name { get; } = "Events 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.MachinesEvents.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())
+                {
+                    var events = await db.MachinesEvents
+                        .OrderByDescending(x => x.LastUpdated)
+                        .Where(x => x.LastUpdated < from)
+                        .Take(10)
+                        .ToListAsync();
+
+                    List<TelemetryEvent> tRuns = new List<TelemetryEvent>();
+
+                    foreach (var ev in events)
+                    {
+                        var tEvent = EventMapper.MapEvent(ev);
+                        tRuns.Add(tEvent);
+                    }
+
+                    return tRuns;
+                }
+            }
+            finally
+            {
+                _isBusy = false;
+            }
+        }
+
+        public void Dispose()
+        {
+            
+        }
+    }
+}