#include "cell.h"

Cell::Cell()
    : mark( false )
    , north_open( false )
    , west_open( false )
    , south_open( false )
    , east_open( false )
{
    parent = this;
}

bool& Cell::operator[]( Dir& dir )
{
    switch( dir ) {
    case NORTH: return north_open;
    case WEST:  return west_open;
    case SOUTH: return south_open;
    case EAST: default: return east_open;
    }
}

Cell *Cell::getGroup()
{
    Cell *cur = this;

    if( parent == this ) {
        return this;
    } else {
        Cell *group = parent->getGroup();
        parent = group;
        return group;
    }
}

bool Cell::inSameGroup( Cell& other )
{
    return getGroup() == other.getGroup();
}

void Cell::combineGroups( Cell& other )
{
    Cell *myGroup = getGroup();
    Cell *yourGroup = other.getGroup();

    if( myGroup != yourGroup ) {
        myGroup->parent = yourGroup;
    }
}