src/game_state.cpp


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#include "game_state.h"
#include <iostream>
#include <fstream>
#include <limits>

const int OPENING_LINES = 6;
const int GAME_AREA_LINES = 25;

GameState::GameState(std::string mapFilename)
{
    std::ifstream mapFile(mapFilename);
    for (int i=0; i<OPENING_LINES; ++i)
    {
        mapFile.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
    }
    
    int y = 0;

    for (int x=-1; y <= GAME_AREA_LINES; ++x)
    {
        char nextChar = mapFile.get();
        if (nextChar == EOF)
        {
            break;
        }

        switch (nextChar)
        {
        case Alien::MAP_CHAR:
            aliens.push_back(Alien(x,y));
            break;
        case EnemyBullet::ALIEN_MAP_CHAR:
        case EnemyBullet::ENEMY_MISSILE_MAP_CHAR:
            bullets.push_back(EnemyBullet(x,y));
            break;
        case PlayerMissile::MAP_CHAR:
            missiles.push_back(PlayerMissile(x,y));
            break;
        case Shield::MAP_CHAR:
            shields.push_back(Shield(x,y));
            break;
        case Spaceship::ENEMY_MAP_CHAR:
        case Spaceship::PLAYER_MAP_CHAR:
            spaceships.push_back(Spaceship(x+1,y));
            x += 2;
            mapFile.ignore(2);
            break;
        case '\n':
            ++y;
            x = -1;
            break;
        }
    }
}

void GameState::logState()
{
    for (auto alien : aliens)
    {
        std::cout << "Alien " << alien.coords() << std::endl;
    }
    for (auto bullet : bullets)
    {
        std::cout << "Enemy Bullet" << bullet.coords() << std::endl;
    }
    for (auto missile : missiles)
    {
        std::cout << "Player Missile" << missile.coords() << std::endl;
    }
    for (auto shield : shields)
    {
        std::cout << "Shield" << shield.coords() << std::endl;
    }
    for (auto spaceship : spaceships)
    {
        std::cout << "Spaceship" << spaceship.coords() << std::endl;
    }
}