Database.cpp

/*
a.
Cristiano Firmani
Yiftach Nachman
b.
2272725 (Cristiano)
2270838	(Yiftach)
c.
firma103
nachm100
d.
CSPC-350 Section 2
e.
Assignment 2
*/

#include <iostream>
#include "Database.h"
#include <fstream>

using namespace std;
      
Database::Database()
{
	
}
Database::~Database()
{
	
}  
void Database::printStudents()
{
	masterStudent.InOrder(masterStudent.getRoot());
}

void Database::printFaculty()
{
	masterFaculty.InOrder(masterFaculty.getRoot());
}

void Database::findStudent(int ID)
{
	if(masterStudent.find(ID)==1)
		masterStudent.returnData(ID).printAll();					//Finds the student, uses a function to show all his data.
}

void Database::findFaculty(int ID)
{
	if(masterFaculty.find(ID)==1)	
		masterFaculty.returnData(ID).printAll();
}

void Database::findStudentAdv(int ID)
{
	if(masterStudent.find(ID)==1)
	{
		int AdvisorID=masterStudent.returnData(ID).getAdvisor();
		masterFaculty.returnData(AdvisorID).printAll();
	}
}

void Database::printAdvStudents(int ID)
{
	if(masterFaculty.find(ID)==1)
		masterFaculty.returnData(ID).printStudents();
	else
		cout<<"Advisor not found."<<endl;
}

void Database::addStudent(string M, double gpa, int A, int id, string name, string level)
{
	cout<<"1"<<endl;
	Student *tempStudent=new Student(id, name, level, M, gpa, A);
	cout<<"2"<<endl;
	masterStudent.insert(id, *tempStudent);
	cout<<"3"<<endl;
	
	if(masterFaculty.find(A)==1)
		masterFaculty.returnData(A).addStudent(*tempStudent);
	else
		cout<<"Advisor not found."<<endl;
		
}	
void Database::removeStudent(int studentID)
{
	Student tempStudent=masterStudent.returnData(studentID);
	int advisorID=tempStudent.getAdvisor();
	masterFaculty.returnData(advisorID).removeStudent(tempStudent);
	masterStudent.deleteNode(studentID);
}	
void Database::addAdvisor(string D, int id, string name, string level)
{
	Faculty *tempAdvisor= new Faculty(id, name, level, D);
	
	masterFaculty.insert(id, *tempAdvisor);
}
void Database::removeAdvisor(int advisorID, int newAdvisorID)
{
	Faculty oldAdvisor=masterFaculty.returnData(advisorID);				//Finds the necessary advisors and then moves any of the students from the advisor being deleted
	Faculty newAdvisor=masterFaculty.returnData(newAdvisorID);
	
	oldAdvisor.convertStudents(newAdvisor);
	
	
}
void Database::changeStudentAdv(int studentID, int advisorID)
{
	if(masterStudent.find(studentID)==1)
	{
		int currentAdvisorID=masterStudent.returnData(studentID).getAdvisor();
		Student tempStudent=masterStudent.returnData(studentID);
		Faculty oldAdvisor=masterFaculty.returnData(currentAdvisorID);	
		Faculty newAdvisor=masterFaculty.returnData(advisorID);
		if(tempStudent.getAdvisor()!=oldAdvisor.getID())
			cout<<"That student is not an advisee to the given advisor. " <<endl;
		else
		{
			newAdvisor.addStudent(tempStudent);
			oldAdvisor.removeStudent(tempStudent);
		}

	

	}
	else
		cout<<"Student not found."<<endl; 	

}
void Database::removeAdvStudent(int advisorID, int studentID)
{
	if(masterStudent.find(studentID)==1)
	{
		Student tempStudent=masterStudent.returnData(studentID);
		Faculty tempAdvisor=masterFaculty.returnData(advisorID);
		if(tempStudent.getAdvisor()!=advisorID)
			cout<<"That student is not an advisee to the given advisor. " <<endl;
		else
		{
			tempAdvisor.removeStudent(tempStudent);
		}
	}
}
void Database::rollback()
{
	if(options.isEmpty()==1)
	{
		cout<<"Rollback is not possible"<<endl;
	}
	else if(options.pop()==7 || options.pop()==8)
	{
		BinaryTree<Student> *tempStudent=studentRollback.pop();
		masterStudent=*tempStudent;
	}
	else if(options.pop()==9 || options.pop()==10)
	{
		BinaryTree<Faculty> *tempFaculty=facultyRollback.pop();
		masterFaculty=*tempFaculty;
	}
}

void Database::fixOptionStack(genstack<int> options)
{
	if(options.isFull()==1)
	{
		int tempInt=options.pop();			//Takes the full stack of previously selected options and frees up the oldest one
		int tempInt1=options.pop();			//leaving room for the next option.
		int tempInt2=options.pop();
		int tempInt3=options.pop();
		int tempInt4=options.pop();
		
		options.push(tempInt3);
		options.push(tempInt2);
		options.push(tempInt1);
		options.push(tempInt);
	}
	
}
void Database::mainLoop()
{	
	int option;
	while(option!=14)
	{
		if(ifstream("facultyTable.txt") && ifstream("studentTable.txt"))
		{
			cout<<"Which option would you like to complete: "<<endl;
			cout<< "1. Print all students and their information "<<endl;
			cout<< "2. Print all faculty and their information " <<endl;
			cout<< "3. Find and display student information given the students id " <<endl;
			cout<< "4. Find and display faculty information given the faculty id " <<endl;
			cout<< "5. Given a student’s id, print the name and info of their faculty advisor " <<endl;
			cout<< "6. Given a faculty id, print ALL the names and info of his/her advisees " <<endl;
			cout<< "7. Add a new student " <<endl;
			cout<< "8. Delete a student given the id " <<endl;
			cout<< "9. Add a new faculty member " <<endl;
			cout<< "10. Delete a faculty member given the id " <<endl;
			cout<< "11. Change a student’s advisor given the student id and the new faculty id " <<endl;
			cout<< "12. Remove an advisee from a faculty member given the ids " <<endl;
			cout<< "13. Rollback " <<endl;
			cout<< "14. Exit " <<endl;
			
			cout<< "\n Simply type the number you would like to complete. ('1' or '2 or '3' etc.)" <<endl;
			cin>> option;
			
			if(option == 1)
			{
				
				printStudents();
			}
			else if(option == 2)
			{
				fixOptionStack(options);
				options.push(2);				
				printFaculty();
			}
			else if(option == 3)
			{
				
				int studentID;
				cout<< "Please input the ID of the student you would like to find: " <<endl;
				cin>>studentID;
				
				findStudent(studentID);
				
			}
			else if(option == 4)
			{
			
				int advisorID;
				cout<< "Please input the ID of the advisor you would like to find: "<<endl;
				cin>>advisorID;
				
				findFaculty(advisorID);
			}
			else if(option == 5)
			{
			
				int studentID;
				cout<<"Please input the ID of the student that you would like to find the advisor to." <<endl;
				cin>>studentID;
				findStudentAdv(studentID);
			}
			else if(option == 6)
			{
				
			
				int advisorID;
				cout<<"Please input the ID of the advisor that you would like to print the students of. " <<endl;
				cin>>advisorID;
				printAdvStudents(advisorID);
			}
			else if(option == 7 || option == 8)
			{
				studentPrev4=studentPrev3;
				studentPrev3=studentPrev2;
				studentPrev2=studentPrev1;
				studentPrev1=studentPrev;
				studentPrev=&masterStudent;
				
				studentRollback.empty();
				studentRollback.push(studentPrev4);
				studentRollback.push(studentPrev3);
				studentRollback.push(studentPrev2);
				studentRollback.push(studentPrev1);
				studentRollback.push(studentPrev);
				if(option==7)
				{	
					fixOptionStack(options);
					options.push(7);					
					
					int studentID;
					string studentName;
					string studentLevel;
					string studentMajor;
					double studentGPA;
					int advisorID;
				
					cout<<"Please input the ID of the student"<<endl;
					cin>>studentID;
					cout<<"Please input the name of the student"<<endl;
					cin>>studentName;
					cout<<"Please input the level (grade) of the student"<<endl;
					cin>>studentLevel;
					cout<<"Please input the student's major"<<endl;
					cin>>studentMajor;
					cout<<"Please input the student's GPA"<<endl;
					cin>>studentGPA;
					cout<<"Please input the ID of the student's advisor"<<endl;
					cin>>advisorID;
				
					addStudent(studentMajor, studentGPA, advisorID, studentID, studentName, studentLevel);
				}
				else if(option==8)
				{
					fixOptionStack(options);
					options.push(8);
					
					int studentID;
					cout<<"Please input the ID of the student you would like to remove."<<endl;
					cin>>studentID;
				
					removeStudent(studentID);	
				}
				
			}
			else if(option == 9 || option==10)
			{
				facultyPrev4=facultyPrev3;
				facultyPrev3=facultyPrev2;
				facultyPrev2=facultyPrev1;
				facultyPrev1=facultyPrev;
				facultyPrev=&masterFaculty;
				
				studentRollback.empty();
				facultyRollback.push(facultyPrev4);
				facultyRollback.push(facultyPrev3);
				facultyRollback.push(facultyPrev2);
				facultyRollback.push(facultyPrev1);
				facultyRollback.push(facultyPrev);
				
				if(option==9)
				{
					fixOptionStack(options);
					options.push(9);
					
					int advisorID;
					string advisorName;
					string advisorLevel;
					string advisorDepartment;

			
					cout<<"Please input the ID of the advisor"<<endl;
					cin>>advisorID;
					cout<<"Please input the name of the advisor"<<endl;
					cin>>advisorName;
					cout<<"Please input the level (lecturer, assistant prof, associate prof, etc) of the advisor"<<endl;
					cin>>advisorLevel;
					cout<<"Please input the advisor's department"<<endl;
					cin>>advisorDepartment;


							
					addAdvisor(advisorDepartment, advisorID, advisorName, advisorLevel);					
				}
				else if(option==10)
				{
					fixOptionStack(options);
					options.push(10);
						
					int advisorID;
					int newAdvisorID;
					cout<<"Please input the ID of the advisor you would like to remove."<<endl;
					cin>>advisorID;
					cout<<"Please input the ID of the advisor you would like to move the students to."<<endl;
					cin>>newAdvisorID;
					
				
					removeAdvisor(advisorID, newAdvisorID);			
				}

			}
			else if(option == 11)
			{
				
				int studentID;
				int newAdvisorID;
				cout<<"Please input the ID of the student you would like to change the advisor of"<<endl;
				cin>>studentID;
				cout<<"Please input the ID of the new advisor you would like to move the student to"<<endl;
				cin>>newAdvisorID;
				
				changeStudentAdv(studentID, newAdvisorID);
			}
			else if(option == 12)
			{
				
				int advisorID;
				int studentID;
				cout<<"Please input the ID of the Advisor you would like to remove a student from"<<endl;
				cin>>advisorID;
				cout<<"Please input the ID of the student you would like to remove"<<endl;
				cin>>studentID;
				removeAdvStudent(advisorID, studentID);
			}
			else if(option == 13)
			{
				rollback();
			}
			else if(option == 14)
			{
				
				break;
			}
			else
			{
				cout<< "Invalid entry" << endl;
			}
		}
		else
		{
			ofstream outfile ("FacultyTable.txt");

			outfile << "Faculty Table" << endl;

			outfile.close();
		
			ofstream outifle("StudentTable.txt");
		
			outfile<< "Student Table"<< endl;
		
			outfile.close();
		
		}
	}
}