Refactor existing code

src/main/java/emu/grasscutter/utils/Crypto.java

@@ -7,8 +7,8 @@ import emu.grasscutter.Grasscutter;
 import emu.grasscutter.net.proto.GetPlayerTokenRspOuterClass.GetPlayerTokenRsp;
 import emu.grasscutter.net.proto.QueryCurrRegionHttpRspOuterClass.QueryCurrRegionHttpRsp;
 
-public class Crypto {
-	private static SecureRandom secureRandom = new SecureRandom();
+public final class Crypto {
+	private static final SecureRandom secureRandom = new SecureRandom();
 	public static final long ENCRYPT_SEED = Long.parseUnsignedLong("11468049314633205968");
 	public static byte[] ENCRYPT_SEED_BUFFER = new byte[0];
 
@@ -37,8 +37,7 @@ public class Crypto {
 			FileUtils.write(Grasscutter.getConfig().KEY_FOLDER + "secretKeyBuffer.bin", p.getSecretKeyBuffer().toByteArray());
 			Grasscutter.getLogger().info("Secret Key: " + p.getSecretKey());
 		} catch (Exception e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
+			Grasscutter.getLogger().error("Crypto error.", e);
 		}
 	}
 	
@@ -47,7 +46,7 @@ public class Crypto {
 			QueryCurrRegionHttpRsp p = QueryCurrRegionHttpRsp.parseFrom(Base64.getDecoder().decode(data));
 			FileUtils.write(Grasscutter.getConfig().KEY_FOLDER + "dispatchSeed.bin", p.getRegionInfo().getSecretKey().toByteArray());
 		} catch (Exception e) {
-			e.printStackTrace();
+			Grasscutter.getLogger().error("Crypto error.", e);
 		}
 	}
 	

src/main/java/emu/grasscutter/utils/FileUtils.java

@@ -1,21 +1,21 @@
 package emu.grasscutter.utils;
 
+import emu.grasscutter.Grasscutter;
+
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 
-public class FileUtils {
-	
+public final class FileUtils {
 	public static void write(String dest, byte[] bytes) {
 		Path path = Paths.get(dest);
 		
 		try {
 			Files.write(path, bytes);
 		} catch (IOException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
+			Grasscutter.getLogger().warn("Failed to write file: " + dest);
 		}
 	}
 	
@@ -27,8 +27,7 @@ public class FileUtils {
 		try {
 			return Files.readAllBytes(path);
 		} catch (IOException e) {
-			// TODO Auto-generated catch block
-			e.printStackTrace();
+			Grasscutter.getLogger().warn("Failed to read file: " + path);
 		}
 		
 		return new byte[0];

src/main/java/emu/grasscutter/utils/ProtoHelper.java

@@ -3,7 +3,7 @@ package emu.grasscutter.utils;
 import emu.grasscutter.game.props.PlayerProperty;
 import emu.grasscutter.net.proto.PropValueOuterClass.PropValue;
 
-public class ProtoHelper {
+public final class ProtoHelper {
 	public static PropValue newPropValue(PlayerProperty key, int value) {
 		return PropValue.newBuilder().setType(key.getId()).setIval(value).setVal(value).build();
 	}

src/main/java/emu/grasscutter/utils/Utils.java

@@ -1,17 +1,19 @@
 package emu.grasscutter.utils;
 
-import java.io.BufferedInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.IOException;
-import java.io.InputStream;
+import java.io.*;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
 import java.util.Random;
 
+import emu.grasscutter.Config;
 import emu.grasscutter.Grasscutter;
 import io.netty.buffer.ByteBuf;
 import io.netty.buffer.ByteBufUtil;
 import io.netty.buffer.Unpooled;
+import org.slf4j.Logger;
 
-public class Utils {
+@SuppressWarnings({"UnusedReturnValue", "BooleanMethodIsAlwaysInverted"})
+public final class Utils {
 	public static final Random random = new Random();
 	
 	public static int randomRange(int min, int max) {
@@ -76,4 +78,77 @@ public class Utils {
 	    }
 	    return v7;
 	}
+
+	/**
+	 * Checks if a file exists on the file system.
+	 * @param path The path to the file.
+	 * @return True if the file exists, false otherwise.
+	 */
+	public static boolean fileExists(String path) {
+		return new File(path).exists();
+	}
+
+	/**
+	 * Creates a folder on the file system.
+	 * @param path The path to the folder.
+	 * @return True if the folder was created, false otherwise.
+	 */
+	public static boolean createFolder(String path) {
+		return new File(path).mkdirs();
+	}
+
+	/**
+	 * Copies a file from the archive's resources to the file system.
+	 * @param resource The path to the resource.
+	 * @param destination The path to copy the resource to.
+	 * @return True if the file was copied, false otherwise.
+	 */
+	public static boolean copyFromResources(String resource, String destination) {
+		try (InputStream stream = Grasscutter.class.getResourceAsStream(resource)) {
+			if(stream == null) {
+				Grasscutter.getLogger().warn("Could not find resource: " + resource);
+				return false;
+			}
+
+			Files.copy(stream, new File(destination).toPath(), StandardCopyOption.REPLACE_EXISTING);
+			return true;
+		} catch (Exception e) {
+			Grasscutter.getLogger().warn("Unable to copy resource " + resource + " to " + destination, e);
+			return false;
+		}
+	}
+
+	/**
+	 * Checks for required files and folders before startup.
+	 */
+	public static void startupCheck() {
+		Config config = Grasscutter.getConfig();
+		Logger logger = Grasscutter.getLogger();
+		boolean exit = false;
+
+		String resourcesFolder = config.RESOURCE_FOLDER;
+		String dataFolder = config.DATA_FOLDER;
+
+		// Check for resources folder.
+		if(!fileExists(resourcesFolder)) {
+			logger.info("Creating resources folder...");
+			logger.info("Place a copy of 'GenshinData' in the resources folder.");
+			createFolder(resourcesFolder); exit = true;
+		}
+
+		// Check for GenshinData.
+		if(!fileExists(resourcesFolder + "BinOutput") ||
+				!fileExists(resourcesFolder + "ExcelBinOutput")) {
+			logger.info("Place a copy of 'GenshinData' in the resources folder.");
+			exit = true;
+		}
+
+		// Check for game data.
+		if(!fileExists(dataFolder))
+			createFolder(dataFolder);
+		if(!fileExists(dataFolder + "AbilityEmbryos.json"))
+			copyFromResources("data/AbilityEmbryos.json", dataFolder);
+
+		if(exit) System.exit(1);
+	}
 }