public async Task <List <UserTrainingProgram> > CalculateUserTrainingProgram(User user)
{
var body = new ChooseTrainingProgramBody()
{
User = user,
AllTrainingPrograms = App.defaultTrainingPrograms
};
var response = await App.MobileService.InvokeApiAsync <ChooseTrainingProgramBody, List <UserTrainingProgram> >(
"ChooseTrainingProgram", // The name of the API
body, // The body of the POST
HttpMethod.Post, // The HTTP Method
null);
return(response);
}
public List <UserTrainingProgram> PostAsync([FromBody] ChooseTrainingProgramBody body)
{
var userPreferredWorkoutDays = body.User.PreferredWorkoutDays.Split(';');
//First, filter by preferred training program type
var optionalDefaultProgramsByType = body.AllTrainingPrograms.Where(program => program.TrainingProgramType == body.User.PreferredTrainingProgramType);
// Weight functions definitions
TrainingProgramGoal[] goalsDistance = { TrainingProgramGoal.Speed, TrainingProgramGoal.Flexibility, TrainingProgramGoal.WeightLoss, TrainingProgramGoal.Fitness, TrainingProgramGoal.Strength, TrainingProgramGoal.Size };
Difficulty[] difficulties = { Difficulty.Begginer, Difficulty.Intermediate, Difficulty.Expert };
double firstPlaceGrade = 0;
double secondPlaceGrade = 0;
double thirdPlaceGrade = 0;
DefaultTrainingProgram firstPlace = null;
DefaultTrainingProgram secondPlace = null;
DefaultTrainingProgram thirdPlace = null;
// Calculate grades for all programs
foreach (var program in body.AllTrainingPrograms)
{
double currentProgramGoalWeight = goalsDistance.ToList().FindIndex(goal => goal.Equals(program.TrainingProgramGoal));
double userPreferredGoalWeight = goalsDistance.ToList().FindIndex(goal => goal.Equals(body.User.PreferredTrainingGoal));
double currentProgramDiffiucaltyWeight = difficulties.ToList().FindIndex(difficulty => difficulty.Equals(program.Difficulty));
double userPreferredDiffiucaltyWeight = difficulties.ToList().FindIndex(difficulty => difficulty.Equals(body.User.PreferredTrainingProgramDifficulty));
double goalsGrade = 1 - (Math.Abs(currentProgramGoalWeight - userPreferredGoalWeight) / goalsDistance.Count());
double diffiucaltyGrade = 1 - (Math.Abs(currentProgramDiffiucaltyWeight - userPreferredDiffiucaltyWeight) / difficulties.Count());
double totalProgramGrade = 6 * goalsGrade + diffiucaltyGrade;
// Check if program's grade is bigger then the max grades
if (totalProgramGrade > firstPlaceGrade)
{
thirdPlaceGrade = secondPlaceGrade;
secondPlaceGrade = firstPlaceGrade;
firstPlaceGrade = totalProgramGrade;
thirdPlace = secondPlace;
secondPlace = firstPlace;
firstPlace = program;
}
else if (totalProgramGrade > secondPlaceGrade)
{
thirdPlaceGrade = secondPlaceGrade;
secondPlaceGrade = totalProgramGrade;
thirdPlace = secondPlace;
secondPlace = program;
}
else if (totalProgramGrade > thirdPlaceGrade)
{
thirdPlace = program;
thirdPlaceGrade = totalProgramGrade;
}
}
var optionalUserPrograms = new List <UserTrainingProgram>();
var firstSuggestedProgram = CreateUserTrainingProgram(firstPlace, body.User);
optionalUserPrograms.Add(firstSuggestedProgram);
var secondSuggestedProgram = CreateUserTrainingProgram(secondPlace, body.User);
optionalUserPrograms.Add(secondSuggestedProgram);
var thirdSuggestedProgram = CreateUserTrainingProgram(thirdPlace, body.User);
optionalUserPrograms.Add(thirdSuggestedProgram);
return(optionalUserPrograms);
}
