public double GetNioshIndex(NioshCalculateDto dto)
{
if (String.IsNullOrEmpty(dto.LiftFrequencyType))
{
dto.LiftFrequencyType = this.GetLiftFrequencyTypes().First().Type;
}
if (String.IsNullOrEmpty(dto.LiftDurationType))
{
dto.LiftDurationType = this.GetLiftDurationTypes().First().Type;
}
if (!dto.EffortType.Contains("Lift") || dto.WeightLb <= 0)
{
return(-1);
}
int lc = 51;
//var hm = 1;
double vm = 1 - 0.0075 * Math.Abs(dto.FromHeight - 30);
double dist = Math.Abs(dto.ToHeight - dto.FromHeight);
if (dist == 0)
{
return(-1);
}
double dm = 0.82 + 1.8 / dist;
//var am = 1; //assymetry
double fm = 1.0; //frequency
//var cm = 1; // coupling
//
//frequency multiplier is defined by
// a. lifts per minute F
// b. vertical location of hands at origin V
// c. durtion of continuous lifting
//
string liftOriginType = "Low";
if (dto.FromHeight > 30)
{
liftOriginType = "High";
}
//
//TBD: Cache Frequency Multipliers
//
fm = this.FrequencyMultipliers()
.Where(f => f.LiftDurationType == dto.LiftDurationType &&
f.LiftFrequencyType == dto.LiftFrequencyType &&
f.LiftOriginType == liftOriginType)
.Select(f => f.Multiplier)
.DefaultIfEmpty(0)
.FirstOrDefault();
var rwl = lc * vm * dm * fm;
var liftingIndex = dto.WeightLb / rwl;
return(liftingIndex);
}
public async Task <double> GetNioshIndex(NioshCalculateDto dto)
{
var response = await _httpClient.PostAsJsonAsync <NioshCalculateDto>(BaseUrl + "/helpers/nioshIndex", dto);
var nioshIndex = response.Content.ReadFromJsonAsync <double>().Result;
return(nioshIndex);
}
public bool Update(UpdateJobTaskDto dto)
{
var dbJobTask = _context.JobTasks.Find(dto.Id);
//
//make sure this task name is unique for this
//jobTask
//
bool exists = (from item in _context.JobTasks
where item.Id != dbJobTask.Id &&
item.Name == dto.Name &&
item.JobId == dbJobTask.JobId
select item).Any();
if (exists)
{
throw new OccumetricException("This task name is already taken in this job description.");
}
//
//calculate niosh and snooks
//
var snooksDto = new SnooksCalculateDto
{
EffortType = dto.EffortType,
WeightLb = (int)dto.WeightLb,
FromHeight = Utility.SanitizeStringToInteger(dto.FromHeight),
ToHeight = Utility.SanitizeStringToInteger(dto.ToHeight),
};
var snooksVm = _helperService.CalculateSnooks(snooksDto);
dbJobTask.SnooksMale = snooksVm.StrMalePercentage;
dbJobTask.SnooksFemale = snooksVm.StrFemalePercentage;
var nioshDto = new NioshCalculateDto
{
WeightLb = (int)dto.WeightLb,
EffortType = dto.EffortType,
FromHeight = Utility.SanitizeStringToInteger(dto.FromHeight),
ToHeight = Utility.SanitizeStringToInteger(dto.ToHeight),
LiftDurationType = dto.LiftDurationType,
LiftFrequencyType = dto.LiftFrequencyType
};
dbJobTask.LiftingIndex = _helperService.GetNioshIndex(nioshDto);
_mapper.Map <UpdateJobTaskDto, JobTask>(dto, dbJobTask);
_context.SaveChanges();
return(true);
}
public IActionResult CalculateNioshIndex(NioshCalculateDto dto)
{
return(Ok(_helperService.GetNioshIndex(dto)));
}
