public static Drug GetDrug(Int32 pzn)
{
using (PharmacyContainer db = new PharmacyContainer())
{
return GetDrug(pzn, db);
}
}
public static ReplenishmentOrder GetOrder(Int32 id)
{
using (PharmacyContainer db = new PharmacyContainer())
{
return GetOrder(id, db);
}
}
public static ICollection<Position> GetPendingPositionsForDrug(Int32 pzn)
{
using (PharmacyContainer db = new PharmacyContainer())
{
return PendingPositionsFor(pzn, db).ToList();
}
}
public static void InitiateReplenishment(int pzn, int quantity)
{
using (PharmacyContainer db = new PharmacyContainer())
{
InitiateReplenishment(pzn, quantity, db);
}
}
public static void Restock(Int32 pzn, Int32 quantity, DateTime dateOfAction)
{
using (PharmacyContainer db = new PharmacyContainer())
{
Drug drug = GetDrug(pzn, db);
drug.Apply(RestockEvent.Create(drug, quantity, dateOfAction));
db.SaveChanges();
}
}
public static bool RequiresReplenishment(Int32 pzn)
{
using (PharmacyContainer db = new PharmacyContainer())
{
Drug drug = GetDrug(pzn, db);
Int32 quantityPending = GetQuantityPending(drug, db);
return drug.RequiresReplenishment(quantityPending);
}
}
public static int GetReplenishmentSuggestion(int pzn)
{
using (PharmacyContainer db = new PharmacyContainer())
{
Drug drug = GetDrug(pzn, db);
Int32 quantityPending = GetQuantityPending(drug, db);
return drug.ReplenishmentSuggestion(quantityPending);
}
}
public static ICollection<Position> GetPositionsForOrder(Int32 id)
{
using (PharmacyContainer db = new PharmacyContainer())
{
return (from p in db.PositionSet.Include("Drug")
where p.Order.Id == id
select p).ToList();
}
}
public static void InitiateReplenishment(Int32 pzn, int quantity, PharmacyContainer db)
{
Drug drug = DrugService.GetDrug(pzn, db);
if (HasOpenOrders(drug, db))
{
AdjustExistingOrderFor(drug, quantity, db);
}
else
{
CreatePositionOnOpenOrNewOrder(drug, quantity, db);
}
db.SaveChanges();
}
public static void Cancel(Int32 id)
{
using (PharmacyContainer db = new PharmacyContainer())
{
ReplenishmentOrder order = GetOrder(id, db);
order.State = order.State.Cancel();
foreach (Position p in order.Positions)
{
InitiateReplenishment(p.DrugPZN, p.Quantity, db);
}
// migrate all positions to new or existing open order
db.SaveChanges();
}
}
public static Boolean HasOpenOrders(Drug drug, PharmacyContainer db)
{
return OpenOrdersFor(drug, db).Count() > 0;
}
internal static IQueryable<Position> PendingPositionsFor(Int32 pzn, PharmacyContainer db)
{
return (from p in db.PositionSet.Include("Order")
where p.DrugPZN == pzn
&& (p.Order.State == OrderState.Open ||
p.Order.State == OrderState.Posting ||
p.Order.State == OrderState.Ordered)
select p);
}
public static ICollection<Drug> GetAllDrugs()
{
using (PharmacyContainer db = new PharmacyContainer())
return db.DrugSet.ToList();
}
private static Int32 GetQuantityPending(Drug drug, PharmacyContainer db)
{
if (OrderService.PendingPositionsFor(drug.PZN, db).Count() > 0)
{
// would not work on empty position collections
return OrderService.PendingPositionsFor(drug.PZN, db).Sum(p => p.Quantity);
}
else
{
return 0;
}
}
public static ICollection<ReplenishmentOrder> GetAllOrders()
{
using (PharmacyContainer db = new PharmacyContainer())
return db.ReplenishmentOrderSet.ToList();
}
public static void Replenish(Int32 pzn, Int32 quantity, DateTime? dateOfAction, PharmacyContainer db)
{
Drug drug = GetDrug(pzn, db);
drug.Apply(ReplenishEvent.Create(drug, quantity, FailOnNull(dateOfAction)));
db.SaveChanges();
}
private static bool OpenOrdersAvailable(PharmacyContainer db)
{
return GetOpenOrders(db).Count() > 0;
}
private static IQueryable<ReplenishmentOrder> OpenOrdersFor(Drug drug, PharmacyContainer db)
{
return (from o in db.ReplenishmentOrderSet
where o.Positions.Where(p => p.DrugPZN == drug.PZN).Count() > 0
&& o.State == OrderState.Open select o);
}
private static void CreatePositionOnOpenOrNewOrder(Drug drug, int quantity, PharmacyContainer db)
{
if (OpenOrdersAvailable(db))
{
ReplenishmentOrder openOrder = GetOpenOrders(db).First();
openOrder.Positions.Add(new Position
{
Drug = drug,
Order = openOrder,
Quantity = quantity
});
}
else
{
ReplenishmentOrder newOrder = new ReplenishmentOrder();
newOrder.Positions.Add(new Position
{
Drug = drug,
Order = newOrder,
Quantity = quantity
});
db.ReplenishmentOrderSet.Add(newOrder);
}
}
private static IEnumerable<ReplenishmentOrder> GetOpenOrders(PharmacyContainer db)
{
return (from o in db.ReplenishmentOrderSet where o.State == OrderState.Open select o);
}
private static void AdjustExistingOrderFor(Drug drug, int quantity, PharmacyContainer db)
{
foreach (Position p in GetPendingPositionsForDrug(drug.PZN))
{
if (p.Order.State == OrderState.Open)
{
p.Quantity = p.Quantity + quantity;
db.Entry(p).State = System.Data.EntityState.Modified;
}
}
}
private static Drug CreateDrug(Drug newDrug)
{
using (PharmacyContainer db = new PharmacyContainer())
{
var count = (from d in db.DrugSet where d.PZN == newDrug.PZN select d).Count();
if (count > 0)
throw new ArgumentException(String.Format("Drug with PZN {0} already exists!", newDrug.PZN));
db.DrugSet.Add(newDrug);
db.SaveChanges();
return newDrug;
}
}
public static Drug UpdateDrug(Drug drug, String name, String description, int minimumInventoryLevel, int optimalInventoryLevel)
{
Util.ConvertEmptyToNull(ref description);
using (PharmacyContainer db = new PharmacyContainer())
{
Drug attachedDrug = GetDrug(drug.PZN, db);
attachedDrug.Name = name;
attachedDrug.Description = description;
attachedDrug.MinimumInventoryLevel = minimumInventoryLevel;
attachedDrug.OptimalInventoryLevel = optimalInventoryLevel;
db.SaveChanges();
return attachedDrug;
}
}
internal static ReplenishmentOrder GetOrder(Int32 id, PharmacyContainer db)
{
ReplenishmentOrder result = (from o in db.ReplenishmentOrderSet where o.Id == id select o).FirstOrDefault();
if (result == default(ReplenishmentOrder))
throw new ArgumentException(String.Format("Order with ID {0} not found", id.ToString()));
return result;
}
public static void UpdateExpectedDeliveryDate(Int32 id, DateTime expectedDelivery)
{
using (PharmacyContainer db = new PharmacyContainer())
{
ReplenishmentOrder order = GetOrder(id, db);
order.ExpectedDelivery = expectedDelivery;
db.SaveChanges();
}
}
public static void ProceedToNextState(Int32 id)
{
using (PharmacyContainer db = new PharmacyContainer())
{
ReplenishmentOrder order = GetOrder(id, db);
order.State = order.State.Next();
if (order.State == OrderState.Finished)
{
foreach (Position p in order.Positions)
{
DrugService.Replenish(p.Drug.PZN, p.Quantity, order.ActualDelivery, db);
}
}
db.SaveChanges();
}
}
internal static Drug GetDrug(Int32 pzn, PharmacyContainer db)
{
Drug result = (from d in db.DrugSet where d.PZN == pzn select d).FirstOrDefault();
if (result == default(Drug))
throw new ArgumentException(String.Format("Drug with PZN {0} not found", pzn.ToString()));
return result;
}