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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()
{
}
}
}
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