net.famzangl.minecraft.minebot.settings.MinebotSettings.java Source code

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Here is the source code for net.famzangl.minecraft.minebot.settings.MinebotSettings.java

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/*******************************************************************************
 * This file is part of Minebot.
 *
 * Minebot is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Minebot is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Minebot.  If not, see <http://www.gnu.org/licenses/>.
 *******************************************************************************/
package net.famzangl.minecraft.minebot.settings;

import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Date;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.Marker;
import org.apache.logging.log4j.MarkerManager;

import net.famzangl.minecraft.minebot.ai.InteractAlways;
import net.famzangl.minecraft.minebot.ai.path.world.BlockFloatMap;
import net.famzangl.minecraft.minebot.ai.path.world.BlockSet;
import net.famzangl.minecraft.minebot.ai.tools.ToolRater;
import net.famzangl.minecraft.minebot.settings.serialize.BlockFloatAdapter;
import net.famzangl.minecraft.minebot.settings.serialize.BlockSetAdapter;
import net.famzangl.minecraft.minebot.settings.serialize.ToolRaterAdapter;
import net.minecraft.client.Minecraft;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonParseException;

/**
 * This wraps a minebot setting file and provides convenient access to the
 * values stored in it.
 * 
 * @author michael
 * 
 */
public class MinebotSettings {
    private static final Marker MARKER_SETTINGS = MarkerManager.getMarker("settings");
    private static final Logger LOGGER = LogManager.getLogger(MinebotSettings.class);

    private static final MinebotSettings INSTANCE = new MinebotSettings();

    private static final MinebotSettingsRoot defaultSettings = new MinebotSettingsRoot();

    private MinebotSettingsRoot settings;
    private ArrayList<String> keys;

    private long settingsLastModified = 0;

    private static Object mutex = new Object();

    private MinebotSettings() {
    }

    private synchronized MinebotSettingsRoot createSettings() {
        File settingsFile = getSettingsFile();
        if (settings == null || changedSinceLastLoad(settingsFile)) {
            settings = null;
            try {
                settingsLastModified = settingsFile.lastModified();
                LOGGER.debug(MARKER_SETTINGS, "Loading " + settingsFile.getAbsolutePath() + " ... (date: "
                        + new Date(settingsLastModified) + ")");
                Gson gson = getGson();
                settings = gson.fromJson(new FileReader(settingsFile), MinebotSettingsRoot.class);
                validateAfterLoad(settings);
            } catch (final IOException e) {
                LOGGER.error(MARKER_SETTINGS, "Could not read settings file: " + e.getMessage());
            } catch (final JsonParseException e) {
                LOGGER.error(MARKER_SETTINGS, "Error in settings file:" + e.getMessage());
            }
            if (settings == null) {
                LOGGER.info(MARKER_SETTINGS, "Fall back to default settings.");
                settings = defaultSettings;
            }
        }

        return settings;
    }

    private boolean changedSinceLastLoad(File settingsFile) {
        return settingsFile.lastModified() > settingsLastModified;
    }

    private void doWriteSettings() {
        MinebotSettingsRoot settings = createSettings();

        File settingsFile = getSettingsFile();
        try {
            LOGGER.trace(MARKER_SETTINGS, "Writing " + settingsFile.getAbsolutePath() + " ...");
            Gson gson = getGson();
            PrintWriter writer = new PrintWriter(settingsFile);
            gson.toJson(settings, writer);
            writer.close();
        } catch (final IOException e) {
            System.err.println("Could not write settings file.");
        }
    }

    public static Gson getGson() {
        GsonBuilder gson = new GsonBuilder();
        gson.setPrettyPrinting();
        gson.registerTypeAdapter(BlockSet.class, new BlockSetAdapter());
        gson.registerTypeAdapter(BlockFloatMap.class, new BlockFloatAdapter());
        gson.registerTypeAdapter(ToolRater.class, new ToolRaterAdapter());
        return gson.create();
    }

    private void validateAfterLoad(MinebotSettingsRoot loaded) {
        FieldValidation.validateAfterLoad(loaded, new MinebotSettingsRoot());
    }

    public static MinebotSettingsRoot getSettings() {
        return getInstance().createSettings();
    }

    public static void writeSettings() {
        INSTANCE.doWriteSettings();
    }

    public static File getDataDir() {
        File dir = new File(Minecraft.getMinecraft().mcDataDir, "minebot");
        LOGGER.trace(MARKER_SETTINGS, "Data directory: " + dir);
        if (!dir.isDirectory()) {
            try {
                return new MinebotDirectoryCreator().createDirectory(dir);
            } catch (IOException e) {
                LOGGER.error(MARKER_SETTINGS, "Could not create settings directory.");
                e.printStackTrace();
            }
        }
        return dir;
    }

    public static File getDataDirFile(String name) {
        return new File(getDataDir(), name);
    }

    public static File getSettingsFile() {
        return getDataDirFile("minebot.json");
    }

    private static MinebotSettings getInstance() {
        return INSTANCE;
    }
}