// Database.cpp
  
  include <iostream>
  include <stdexcept>
  include <string>
  
  include <Database.h>
  
  using namespace std;
  
  namespace Records {
  
    Database::Database()
    {
      mNextSlot = 0;
      mNextEmployeeNumber = kFirstEmployeeNumber;
    }
    Database::~Database()
    {
    }
    Employee& Database::addEmployee(string inFirstName, string inLastName)
    {
      if (mNextSlot >= kMaxEmployees) {
        cerr << "There is no more room to add the new employee!" << endl;
        throw exception();
      }
  
      Employee& theEmployee = mEmployees[mNextSlot++];
      theEmployee.setFirstName(inFirstName);
      theEmployee.setLastName(inLastName);
      theEmployee.setEmployeeNumber(mNextEmployeeNumber++);
      theEmployee.hire();
  
      return theEmployee;
    }
    Employee& Database::getEmployee(int inEmployeeNumber)
    {
      for (int i = 0; i < mNextSlot; i++) {
        if (mEmployees[i].getEmployeeNumber() == inEmployeeNumber) {
          return mEmployees[i];
        }
      }
  
      cerr << "No employee with employee number " << inEmployeeNumber << endl;
      throw exception();
    }
  
    Employee& Database::getEmployee(string inFirstName, string inLastName)
    {
      for (int i = 0; i < mNextSlot; i++) {
        if (mEmployees[i].getFirstName() == inFirstName &&
            mEmployees[i].getLastName() == inLastName) {
          return mEmployees[i];
        }
      }
  
      cerr << "No match with name " << inFirstName << " " << inLastName << endl;
      throw exception();
    }
    void Database::displayAll()
    {
      for (int i = 0; i < mNextSlot; i++) {
        mEmployees[i].display();
      }
    }
  
    void Database::displayCurrent()
    {
      for (int i = 0; i < mNextSlot; i++) {
        if (mEmployees[i].getIsHired()) {
          mEmployees[i].display();
        }
      }
    }
  
    void Database::displayFormer()
    {
      for (int i = 0; i < mNextSlot; i++) {
        if (!mEmployees[i].getIsHired()) {
          mEmployees[i].display();
        }
      }
    }
  }