//	implementation of commandClass

#include "commandClass.h"

//	UTILITY METHODS:
bool commandClass::found( const string MATCH ) const
{
	for( int i = 0; i < numStudents; i++ )		//	cycle thru students
		if( studentArray[i].flag() && studentArray[i] == MATCH )	//	check for match
			return true;
	
	return false;
}

bool commandClass::found( const mediaClass ITEM ) const
{
	for( int i = 0; i < numItems; i++ )		//	cycle thru items
		if( itemArray[i].flag()
			&& itemArray[i] == ITEM 
			&& ITEM.ownedBy( itemArray[i].emailEcho() ) )	//	check for match
			return true;

	return false;
}

//	MUTATORS:
bool commandClass::remove( const string EMAIL )
{
	if( !found( EMAIL ) )	//	check that the student is in the list
		return false;

	for( int i = 0; i < numStudents; i++ )	//	cycle thru students
		if( studentArray[i] == EMAIL )			//	check for match
			studentArray[i].flag( false );			//	flag the student as removed

	for( int i = 0; i < numItems; i++ )		//	cycle thru items
		if( itemArray[i].ownedBy( EMAIL ) )		//	check for match
			itemArray[i].flag( false );				//	flag item removed

	return true;
}
bool commandClass::add( const mediaClass& ITEM )
{
	if( !found( ITEM.emailEcho() ) )	//	checks that the student who owns the item is in the list
		return false;

	for( int i = 0; i < numItems; i ++ )	//	cycle thru items
		if( !itemArray[i].flag() )		//	find next first empty place in array
		{
			itemArray[i] = ITEM;	//	put item in that place
			return true;
		}

	itemArray[numItems] = ITEM;		//	put item at end of array
	numItems++;

	return true;
}

bool commandClass::add( const studentClass& STUDENT )
{
	if( found( STUDENT.emailEcho() ) )	//	check if student is already defined to prevent duplicates
		return false;

	for( int i = 0; i < numStudents; i++ )	//	cycle thru students
		if( !studentArray[i].flag() )		//	find first empty spot in array
		{
			studentArray[i] = STUDENT;		//	put STUDENT in that spot
			return true;
		}

	studentArray[numStudents] = STUDENT;	//	put student at end of list
	numStudents++;

	return true;
}
//	ACCESSORS:
string commandClass::printStudents() const
{
	ostringstream tempOStream;		//	used to store student info till return time

	for( int i = 0; i < numStudents; i++ )	//	cycle thru students
		if( studentArray[i].flag() )
			tempOStream << studentArray[i];		//	put student info in list

	return tempOStream.str();	//	return list
}

string commandClass::printItems() const
{
	ostringstream tempOStream;	//	item list

	for( int i = 0; i < numItems; i++ )	//	cycle thru items
		if( itemArray[i].flag() )
			tempOStream << itemArray[i].print( true );	//	add item data to list

	return tempOStream.str();	//	return list
}

string commandClass::printSpecific( const string EMAIL ) const
{
	if( !found( EMAIL ) )	//	check that the student is in the array
		return EMAIL + " not found.\n";

	ostringstream tempOStream;	//	list of student info and his media

	for( int i = 0; i < numStudents; i++ )		//	cycle thru students
		if( studentArray[i].flag() && studentArray[i] == EMAIL )
			tempOStream << studentArray[i];		//	print the student's info

	for( int i = 0; i < numItems; i++ )		//	cycle thru items
		if( itemArray[i].flag() && itemArray[i].ownedBy( EMAIL ) )
			tempOStream << itemArray[i].print( false );	//	print the items that belong to EMAIL

	return tempOStream.str();
}

//	CONSTRUCTORS:
commandClass::commandClass()
{
	numStudents = numItems = 0;
}
commandClass::commandClass( const char* STUDENT_FILE, const char* ITEM_FILE )
{
	ifstream studentFile( STUDENT_FILE );	//	student data fstream
	ifstream itemFile( ITEM_FILE );			//	item data fstream

	numStudents = numItems = 0;

	while( studentFile )	//	read in students
	{
		studentClass tempStudent;
		studentFile >> tempStudent;

		add( tempStudent );		// add the student that was just read
	}

	while( itemFile )	//	read in items (must be read after students)
	{
		mediaClass tempItem;
		itemFile >> tempItem;

		add( tempItem );	//	add the item
	}

	//	close files:
	studentFile.close();
	itemFile.close();
}