public UserGoalModel GetUserGoal()
{
GoalType goalType = default(GoalType);
GoalTimePeriod goalTimePeriod = default(GoalTimePeriod);
int goalPeriod = 0;
decimal loseGainWeitgh = 0;
goalType = (GoalType)Settings.GetValueOrDefault(GOAL_TYPE, (int)goalType);
goalTimePeriod = (GoalTimePeriod)Settings.GetValueOrDefault(GOAL_TIME_PERIOD, (int)goalTimePeriod);
goalPeriod = Settings.GetValueOrDefault(GOAL_PERIOD, goalPeriod);
loseGainWeitgh = Settings.GetValueOrDefault(GOAL_LOSE_GAIN, loseGainWeitgh);
return(new UserGoalModel(goalType, goalTimePeriod, goalPeriod, loseGainWeitgh));
}
private int WeightChangePeriodToDays(GoalTimePeriod timePeriod, int periodNumber)
{
switch (timePeriod)
{
case GoalTimePeriod.Days:
return(periodNumber);
case GoalTimePeriod.Weeks:
return(periodNumber * 7);
case GoalTimePeriod.Months:
return(Convert.ToInt32(periodNumber * 30.4));
case GoalTimePeriod.Years:
return(periodNumber * 365);
default: return(0);
}
}
public WeightChangeEstimationResult CalculateWeightChangeEstimation(int age, decimal height, decimal weight, Gender gender, ActivityLevel activityFactor, GoalTimePeriod timePeriod, int periodNumber, GoalType goalType, decimal weightLoseGain, bool imperialUnits = false)
{
if (imperialUnits)
{
height = UnitConverter.FeetToCentimeters(height);
weight = UnitConverter.PoundsToKilograms(weight);
}
var bmr = BMRHarrisBenedict(weight, height, age, gender, imperialUnits);
var dailyCalorieNeed = GetDailyCaloriesEstimation(bmr, activityFactor);
var totalGoalDays = WeightChangePeriodToDays(timePeriod, periodNumber);
var totalCalories = UnitConverter.KilogramsToPounds(weightLoseGain) * 3500;
decimal dailyCaloriesChange = 0m;
if (goalType != GoalType.Maintain)
{
dailyCaloriesChange = totalCalories / totalGoalDays;
}
if (dailyCaloriesChange > 3500m)
{
return(new WeightChangeEstimationResult(Convert.ToInt32(dailyCalorieNeed)));
}
if (goalType == GoalType.Lose)
{
var caloriesToReachGoal = dailyCalorieNeed - dailyCaloriesChange;
var caloriesToMaintainGoal =
GetDailyCaloriesEstimation(bmr, activityFactor) * (UnitConverter.KilogramsToPounds(weight) - UnitConverter.KilogramsToPounds(weightLoseGain)) / UnitConverter.KilogramsToPounds(weight);
return(new WeightChangeEstimationResult(Convert.ToInt32(caloriesToReachGoal), Convert.ToInt32(caloriesToMaintainGoal)));
}
else if (goalType == GoalType.Gain)
{
var caloriesToReachGoal = dailyCalorieNeed + dailyCaloriesChange;
var caloriesToMaintainGoal =
GetDailyCaloriesEstimation(bmr, activityFactor) * (UnitConverter.KilogramsToPounds(weight) + UnitConverter.KilogramsToPounds(weightLoseGain)) / UnitConverter.KilogramsToPounds(weight);
return(new WeightChangeEstimationResult(Convert.ToInt32(caloriesToReachGoal), Convert.ToInt32(caloriesToMaintainGoal)));
}
else if (goalType == GoalType.Maintain)
{
return(new WeightChangeEstimationResult(Convert.ToInt32(dailyCalorieNeed), Convert.ToInt32(dailyCalorieNeed)));
}
return(new WeightChangeEstimationResult(Convert.ToInt32(dailyCalorieNeed)));
}
