game.cpp Example File

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  #include "game.h"

  #include <QFile>
  #include <QJsonArray>
  #include <QJsonDocument>
  #include <QRandomGenerator>
  #include <QTextStream>

  Character Game::player() const
  {
      return mPlayer;
  }

  QVector<Level> Game::levels() const
  {
      return mLevels;
  }

  void Game::newGame()
  {
      mPlayer = Character();
      mPlayer.setName(QStringLiteral("Hero"));
      mPlayer.setClassType(Character::Archer);
      mPlayer.setLevel(QRandomGenerator::global()->bounded(15, 21));

      mLevels.clear();
      mLevels.reserve(2);

      Level village(QStringLiteral("Village"));
      QVector<Character> villageNpcs;
      villageNpcs.reserve(2);
      villageNpcs.append(Character(QStringLiteral("Barry the Blacksmith"),
                                   QRandomGenerator::global()->bounded(8, 11),
                                   Character::Warrior));
      villageNpcs.append(Character(QStringLiteral("Terry the Trader"),
                                   QRandomGenerator::global()->bounded(6, 8),
                                   Character::Warrior));
      village.setNpcs(villageNpcs);
      mLevels.append(village);

      Level dungeon(QStringLiteral("Dungeon"));
      QVector<Character> dungeonNpcs;
      dungeonNpcs.reserve(3);
      dungeonNpcs.append(Character(QStringLiteral("Eric the Evil"),
                                   QRandomGenerator::global()->bounded(18, 26),
                                   Character::Mage));
      dungeonNpcs.append(Character(QStringLiteral("Eric's Left Minion"),
                                   QRandomGenerator::global()->bounded(5, 7),
                                   Character::Warrior));
      dungeonNpcs.append(Character(QStringLiteral("Eric's Right Minion"),
                                   QRandomGenerator::global()->bounded(4, 9),
                                   Character::Warrior));
      dungeon.setNpcs(dungeonNpcs);
      mLevels.append(dungeon);
  }

  bool Game::loadGame(Game::SaveFormat saveFormat)
  {
      QFile loadFile(saveFormat == Json
          ? QStringLiteral("save.json")
          : QStringLiteral("save.dat"));

      if (!loadFile.open(QIODevice::ReadOnly)) {
          qWarning("Couldn't open save file.");
          return false;
      }

      QByteArray saveData = loadFile.readAll();

      QJsonDocument loadDoc(saveFormat == Json
          ? QJsonDocument::fromJson(saveData)
          : QJsonDocument::fromBinaryData(saveData));

      read(loadDoc.object());

      QTextStream(stdout) << "Loaded save for "
                          << loadDoc["player"]["name"].toString()
                          << " using "
                          << (saveFormat != Json ? "binary " : "") << "JSON...\n";
      return true;
  }

  bool Game::saveGame(Game::SaveFormat saveFormat) const
  {
      QFile saveFile(saveFormat == Json
          ? QStringLiteral("save.json")
          : QStringLiteral("save.dat"));

      if (!saveFile.open(QIODevice::WriteOnly)) {
          qWarning("Couldn't open save file.");
          return false;
      }

      QJsonObject gameObject;
      write(gameObject);
      QJsonDocument saveDoc(gameObject);
      saveFile.write(saveFormat == Json
          ? saveDoc.toJson()
          : saveDoc.toBinaryData());

      return true;
  }

  void Game::read(const QJsonObject &json)
  {
      if (json.contains("player") && json["player"].isObject())
          mPlayer.read(json["player"].toObject());

      if (json.contains("levels") && json["levels"].isArray()) {
          QJsonArray levelArray = json["levels"].toArray();
          mLevels.clear();
          mLevels.reserve(levelArray.size());
          for (int levelIndex = 0; levelIndex < levelArray.size(); ++levelIndex) {
              QJsonObject levelObject = levelArray[levelIndex].toObject();
              Level level;
              level.read(levelObject);
              mLevels.append(level);
          }
      }
  }

  void Game::write(QJsonObject &json) const
  {
      QJsonObject playerObject;
      mPlayer.write(playerObject);
      json["player"] = playerObject;

      QJsonArray levelArray;
      foreach (const Level level, mLevels) {
          QJsonObject levelObject;
          level.write(levelObject);
          levelArray.append(levelObject);
      }
      json["levels"] = levelArray;
  }

  void Game::print(int indentation) const
  {
      const QString indent(indentation * 2, ' ');
      QTextStream(stdout) << indent << "Player\n";
      mPlayer.print(indentation + 1);

      QTextStream(stdout) << indent << "Levels\n";
      for (Level level : mLevels)
          level.print(indentation + 1);
  }