public static List <Cycle> CalculateDeviceBatteryChargeCycle(int DeviceID)
{
List <Cycle> CycleList = new List <Cycle>();
var DeviceReadings = DeviceFactory
.DeviceList
.Where(x => x.deviceId == DeviceID)
.OrderBy(x => x.timestamp)
.Select(x => new
{
x.Id,
x.timestamp,
batteryData = DeviceFactory.ExtractJSON(x).Battery
})
.ToList();
var DeviceReadingCycleIndex = CreateChargeCycleIndex(DeviceID);
var GroupedDeviceReadingByCycle = DeviceReadings
.Join(
DeviceReadingCycleIndex,
(a) => a.Id,
(b) => b.Key,
(a, b) => new
{
Timestamp = a.timestamp,
Charging = a.batteryData.charging,
Level = a.batteryData.level,
Cycle = b.Value
})
.GroupBy(x => x.Cycle)
.Select(g => g.ToList())
.ToList();
foreach (var CycleGroup in GroupedDeviceReadingByCycle)
{
var FirstReading = CycleGroup.First();
var LastReading = CycleGroup.Last();
CycleList.Add(new Cycle()
{
Charging = FirstReading.Charging,
PredHalfCycleTime = TotalBatteryChargingDischargeTime(FirstReading.Timestamp, LastReading.Timestamp, FirstReading.Level, LastReading.Level),
});
}
return(CycleList);
}
private static Dictionary <int, int> CreateChargeCycleIndex(int DeviceID)
{
Dictionary <int, int> CycleIndex = new Dictionary <int, int>();
var BatteryReadings = DeviceFactory.DeviceList
.Where(x => x.deviceId == DeviceID)
.OrderBy(x => x.timestamp)
.Select(x => new { x.Id, x.timestamp, batteryData = DeviceFactory.ExtractJSON(x).Battery })
.ToList();
// Compare each reading with previous to determine if they are in the same or different Charge cycle.
int NumBatteryReadings = BatteryReadings.Count();
int Cycle = 0;
for (int i = 0; i < NumBatteryReadings; i++)
{
var cData = BatteryReadings.ToList()[i];
if (i > 0)
{
var pData = BatteryReadings.ToList()[i - 1];
if ((cData.batteryData.charging != pData.batteryData.charging))
{
Cycle++;
}
else
{
if ((cData.batteryData.charging && (cData.batteryData.level < pData.batteryData.level)) ||
(!cData.batteryData.charging && (cData.batteryData.level > pData.batteryData.level)))
{
Cycle++;
}
}
}
else
{
Cycle++;
}
CycleIndex.Add(cData.Id, Cycle);
}
return(CycleIndex);
}