/*
* Методы
*/
#region public static AverageUtilization ConvertFromByteArray(byte[] data)
/// <summary>
/// Конвертирует данные из БД в AverageUtilization
/// </summary>
/// <param name="data"></param>
public static AverageUtilization ConvertFromByteArray(byte[] data)
{
AverageUtilization item = new AverageUtilization();
if (data == null)
{
return(item);
}
byte[] binaryData = data;
if (null == binaryData)
{
return(item);
}
if (binaryData == null || binaryData.Length != SerializedDataLength)
{
throw new ArgumentException("Data cannot be converted to Lifelength");
}
item.SelectedInterval = (UtilizationInterval)DbTypes.Int32FromByteArray(binaryData, 0);
item._hoursPerMonth = BitConverter.ToDouble(binaryData, 4);
item._cyclesPerMonth = BitConverter.ToDouble(binaryData, 12);
return(item);
}
/// <summary>
/// Возвращает приблизительное количество дней, за которое наберется ресурс remains с заданной среднестатистической наработкой
/// </summary>
/// <param name="from"></param>
/// <param name="remains"></param>
/// <param name="average"></param>
/// <param name="conditionType"></param>
/// <returns></returns>
public static Double?GetApproximateDays(DateTime from,
Lifelength remains, AverageUtilization average,
ThresholdConditionType conditionType = ThresholdConditionType.WhicheverFirst)
{
//
if (remains == null || average == null)
{
return(null);
}
if (remains.CalendarValue != null && remains.CalendarValue != 0)
{
var to = from.AddCalendarSpan(remains.CalendarSpan);
return((to - from).Days);
}
var d1 = average.CyclesPerMonth != 0 && remains.Cycles != null ? new Double?(remains.Cycles.Value / (average.Hours / average.Cycles)) : null;
var d2 = average.HoursPerMonth != 0 && remains.Hours != null ? remains.Hours * 30 / average.HoursPerMonth : null;
Double?d3 = remains.Days;
// Whichever First vs. Whichever Later
if (conditionType == ThresholdConditionType.WhicheverFirst)
{
// Выбираем минимум
Double?min = null;
if (d1 != null)
{
min = d1;
}
if (d2 != null && (min == null || d2 < min))
{
min = d2;
}
if (d3 != null && (min == null || d3 < min))
{
min = d3;
}
// Возвращаем результат
return(min);
}
// Выбираем максимум
Double?max = null;
if (d1 != null)
{
max = d1;
}
if (d2 != null && (max == null || d2 > max))
{
max = d2;
}
if (d3 != null && (max == null || d3 > max))
{
max = d3;
}
// Возвращаем результат
return(max);
}
/// <summary>
/// Возвращает наработку агрегата или налет воздушного судна за указанный период времени
/// </summary>
/// <param name="average"></param>
/// <param name="days"></param>
/// <returns></returns>
public static Lifelength GetUtilization(AverageUtilization average, Int32 days)
{
var res = Lifelength.Zero;
if (average != null && average.CyclesPerMonth != 0 && average.HoursPerMonth != 0)
{
res.Cycles = (int)(days * average.CyclesPerMonth / 30);
res.TotalMinutes = (int)(days * average.HoursPerMonth * 60 / 30);
}
res.Days = days;
return(res);
}
/// <summary>
/// Возвращает дату, когда наберется ресурс remains с заданной среднестатистической наработкой
/// </summary>
/// <param name="remains"></param>
/// <param name="average"></param>
/// <param name="conditionType"></param>
/// <returns></returns>
public static DateTime?GetApproximateDate(Lifelength remains, AverageUtilization average, ThresholdConditionType conditionType = ThresholdConditionType.WhicheverFirst)
{
//
if (remains == null || average == null)
{
return(null);
}
// расчитываем количество дней
var days = GetApproximateDays(DateTime.Today, remains, average, conditionType);
if (days == null)
{
return(null);
}
// возвращаем дату
return(DateTime.Today.AddDays(days.Value));
}