private async Task GetMedications(int id)
{
Medications = await _context.Medications.ToListAsync();
var medicationDistributions = await _context.MedicationDistributions.ToListAsync();
MedicationUnits = await _context.MedicationUnits.ToListAsync();
var medicationIds = medicationDistributions.Where(x => x.SubjectId == id).Select(x => x.MedicationId).ToList();
Medications = Medications.Where(x => medicationIds.Contains(x.ID)).ToList();
}
// To protect from overposting attacks, enable the specific properties you want to bind to, for
// more details, see https://aka.ms/RazorPagesCRUD.
public async Task <IActionResult> OnPostAsync(int?id)
{
if (id == null)
{
return(NotFound());
}
Subject = await _context.Subjects.FirstOrDefaultAsync(m => m.ID == id);
if (Subject == null)
{
return(NotFound());
}
if (!ModelState.IsValid)
{
return(Page());
}
SubjectBuy.RequestDate = DateTime.Now.Date;
await GetMedications((int)id);
Medication = Medications.Where(x => x.Name.Trim().ToUpper().Equals(SubjectBuy.MedicationName.Trim().ToUpper())).First();
var _medicationUnits = MedicationUnits.Where(x => x.MedicationId == Medication.ID).ToList();
_medicationUnits = _medicationUnits.Where(x => x.SiteId == Subject.SiteId).ToList();
int quantity = _medicationUnits.Sum(x => x.Quantity);
if (quantity < SubjectBuy.Quantity)
{
QuantityError = "The specified quantity is not available!";
return(Page());
}
else
{
QuantityError = null;
}
quantity = SubjectBuy.Quantity;
int counter = 0;
while (quantity > 0)
{
if (quantity > _medicationUnits[counter].Quantity)
{
quantity -= _medicationUnits[counter].Quantity;
_medicationUnits[counter].Quantity = 0;
}
else
{
_medicationUnits[counter].Quantity -= quantity;
quantity = 0;
}
counter++;
}
foreach (var medicationUnit in _medicationUnits)
{
_context.Attach(medicationUnit).State = EntityState.Modified;
}
_context.SubjectBuys.Add(SubjectBuy);
try
{
await _context.SaveChangesAsync();
}
catch (DbUpdateConcurrencyException)
{
if (!SubjectExists(Subject.ID))
{
return(NotFound());
}
else
{
throw;
}
}
return(RedirectToPage("./Index"));
}