PIbd-23_Polevoy_S.V._SelfPropelledArtilleryUnit_Hard/MapsCollection.java

import java.io.*;
import java.util.HashMap;
import java.util.Set;

public class MapsCollection {
    private final HashMap<String, MapWithSetArtilleriesGeneric<IDrawingObject, AbstractMap>> _mapsStorage;

    private final int _pictureWidth;
    private final int _pictureHeight;

    private final char separatorDict = '|';
    private final char separatorData = ';';

    public Set<String> getKeys() {
        return _mapsStorage.keySet();
    }

    public MapsCollection(int pictureWidth, int pictureHeight) {
        _mapsStorage = new HashMap<>();
        _pictureWidth = pictureWidth;
        _pictureHeight = pictureHeight;
    }

    public void addMap(String name, AbstractMap map) {
        if (!_mapsStorage.containsKey(name)) {
            _mapsStorage.put(name, new MapWithSetArtilleriesGeneric<>(_pictureWidth, _pictureHeight, map));
        }
    }

    public void deleteMap(String name) {
        _mapsStorage.remove(name);
    }

    public MapWithSetArtilleriesGeneric<IDrawingObject, AbstractMap> getMap(String name) {
        return _mapsStorage.getOrDefault(name, null);
    }

    public IDrawingObject getArtillery(String mapName, int index) {
        var map = _mapsStorage.getOrDefault(mapName, null);
        if (map != null) {
            return map._setArtilleries.get(index);
        }
        return null;
    }

    @SuppressWarnings("ResultOfMethodCallIgnored")
    public boolean saveData(String filename) throws IOException {
        File file = new File(filename);

        if (file.exists()) {
            file.delete();
        }

        file.createNewFile();

        try (PrintWriter writer = new PrintWriter(file)) {
            writer.println("MapsCollection");

            for (var storage : _mapsStorage.entrySet()) {
                writer.println(String.format("%s%c%s", storage.getKey(), separatorDict, storage.getValue().getData(separatorDict, separatorData)));
            }

            writer.flush();
        }

        return true;
    }

    public boolean loadData(String filename) throws IOException {
        File file = new File(filename);

        if (!file.exists()) {
            return false;
        }

        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
            String currentLine = reader.readLine();

            if (currentLine == null || !currentLine.contains("MapsCollection")) {
                return false;
            }

            _mapsStorage.clear();
            while ((currentLine = reader.readLine()) != null) {
                var elements = currentLine.split(String.format("\\%c", separatorDict));

                AbstractMap map = switch (elements[1]) {
                    case "SimpleMap" -> new SimpleMap();
                    case "ForestMap" -> new ForestMap();
                    default -> null;
                };

                _mapsStorage.put(elements[0], new MapWithSetArtilleriesGeneric<>(_pictureWidth, _pictureHeight, map));
                _mapsStorage.get(elements[0]).loadData(elements[2].split(separatorData + "\n?"));
            }
        }

        return true;
    }
}