View source for 2020 - Currently no use is made of GetCapacity, make it so an outlet can only have this number of visitor in day

=The Issue=
Find the following method in the company class:

<syntaxhighlight lang=csharp>
public void AddVisitToNearestOutlet(int x, int y)
        {
            int nearestOutlet = 0;
            double nearestOutletDistance, currentDistance;
            nearestOutletDistance = Math.Sqrt((Math.Pow(outlets[0].GetX() - x, 2)) + (Math.Pow(outlets[0].GetY() - y, 2)));
            for (int current = 1; current < outlets.Count; current++)
            {
                currentDistance = Math.Sqrt((Math.Pow(outlets[current].GetX() - x, 2)) + (Math.Pow(outlets[current].GetY() - y, 2)));
                if (currentDistance < nearestOutletDistance)
                {
                    nearestOutletDistance = currentDistance;
                    nearestOutlet = current;
                }
            }
            outlets[nearestOutlet].IncrementVisits();
        }
</syntaxhighlight>

This code calculates the magnitude of the vector between the current location (x and y in the parameters) and each outlet. The shortest distance is used to select a particular outlet.

With the nearest outlet, the method 'IncrementVisits' is run to add a visit for this outlet. This fails to check the capacity of the outlet and would allow unlimited visitors dispite having a capacity set.

=The Solution=
We need to add some logic around the 'outlets[nearestOutlet].IncrementVisits()' line. We should use the GetCapacity method of the outlet to check if we have reached capacity.

=Example=
We will need to create a new method in outlet to return the number of visitors today. So add the following to the 'Outlet' class:

<syntaxhighlight lang=csharp>
        public int VisitsToday()
        {
            return visitsToday;
        }
</syntaxhighlight>

Now add the following logic around the 'outlets[nearestOutlet].IncrementVisits()' line.

<syntaxhighlight lang=csharp>
            if (outlets[nearestOutlet].GetCapacity() < outlets[nearestOutlet].VisitsToday())
            {
                outlets[nearestOutlet].IncrementVisits();
            }
</syntaxhighlight>

=Example=
Instead of the above method, you could just edit the 'IncrementVisits' method in the 'Outlet' class. It should currently be:

<syntaxhighlight lang=csharp>
        public void IncrementVisits()
        {
            visitsToday++;
        }
</syntaxhighlight>

We need to add the logic around the 'visitsToday++;' line:

<syntaxhighlight lang=csharp>
        public void IncrementVisits()
        {
            if (GetCapacity() < visitsToday)
            {
                visitsToday++;
            }
        }
</syntaxhighlight>

Using this method we could also declare a new variable within the 'Outlet' class, called 'turnAway' to record the number of customers turned away when capacity is reached. So add this to the 'Outlet' Class:
<syntaxhighlight lang=csharp>
        public int turnAway=0;
</syntaxhighlight>

Change the logic which checks capacity:

<syntaxhighlight lang=csharp>
        public void IncrementVisits()
        {
            if (GetCapacity() < visitsToday)
            {
                visitsToday++;
            }
            else
            {
                turnAway++;
            }
        }
</syntaxhighlight>

Finally we will need to change the 'NewDay' method in the 'Outlet' class, it currently clears the 'visitsToday' to zero and we also need it to set the 'turnAway' to zero also:
<syntaxhighlight lang=csharp>
        public void NewDay()
        {
            visitsToday = 0;
            turnAway = 0;
        }
</syntaxhighlight>