/// <summary>
/// Adds worker to the organization workers' list.
/// Worker must have valid dept ID.
/// Number of workers of the specified department is increased by 1
/// </summary>
/// <param name="worker">worker</param>
/// <returns>
/// 0 if worker was added successfully
/// -1 if worker with same ID already exists
/// -2 if director is already exists
/// </returns>
public int AddWorker(IWorker worker)
{
// Check if a being added worker does not have same ID as someone else
if (Workers.Find(w => w.ID == worker.ID) != null)
{
return(-1);
}
var d = Department(worker.DeptID);
Workers.Add(worker as Worker);
d.NumberOfEmployees++;
UpdateSalaries(d as BaseDepartment);
return(0);
}
/// <summary>
/// Finds director (president,head) of department
/// </summary>
/// <param name="d">Department</param>
/// <returns>
/// Worker of the Director class or
/// null if a director of deptID department is not found
/// </returns>
public IWorker Director(IDepartmentDTO d)
{
Director dir = Workers.Find(w => w.DeptID == d.DeptID && w is Director) as Director;
return(dir);
}