Initial commit

.gitattributes

@@ -0,0 +1,12 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+
+# Binary files should be left untouched
+*.jar           binary
+

.gitignore

@@ -0,0 +1,11 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build
+app/bin
+
+# Ignore Eclipse IDE files and directories
+.project
+.classpath
+.settings

app/build.gradle

@@ -0,0 +1,33 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * This generated file contains a sample Java application project to get you started.
+ * For more details on building Java & JVM projects, please refer to https://docs.gradle.org/8.14/userguide/building_java_projects.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the application plugin to add support for building a CLI application in Java.
+    id 'application'
+}
+
+repositories {
+    // Use Maven Central for resolving dependencies.
+    mavenCentral()
+}
+
+dependencies {
+    // This dependency is used by the application.
+    implementation libs.guava
+}
+
+// Apply a specific Java toolchain to ease working on different environments.
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(21)
+    }
+}
+
+application {
+    // Define the main class for the application.
+    mainClass = 'org.skinner.WebApp'
+}

app/src/main/java/org/skinner/Database.java

@@ -0,0 +1,156 @@
+package org.skinner;
+
+import java.io.*;
+import java.sql.*;
+import java.util.*;
+import java.util.List;
+
+public class Database {
+	private Database() {
+		try {
+			// TODO: Allow changing connection address
+			connection = DriverManager.getConnection("jdbc:mysql://localhost:3306/skinner", "skinner", "skinner");
+			
+			InputStream is = WebApp.class.getResourceAsStream("/sql/init.sql");
+			executeScript(is);
+			is.close();
+		} catch (IOException e) {
+			errored = true;
+			e.printStackTrace();
+			System.exit(1);
+		} catch (SQLException e) {
+			errored = true;
+			exception = e;
+			e.printStackTrace();
+		}
+	}
+
+	private static final ThreadLocal<Database> instances = ThreadLocal.withInitial(Database::new);
+	
+	protected static Connection getConnection() throws SQLException {
+		Database instance = instances.get();
+		if (instance.errored)
+			throw instance.exception;
+		else
+			return instance.connection;
+	}
+	
+	private void executeScript(InputStream is) throws SQLException, IOException {
+		// NOTE: This is a very simple implementation, should not be used outside this class.
+
+        Statement stmt = connection.createStatement();
+
+        String[] cmds = new String(is.readAllBytes()).split(";");
+        for (String cmd : cmds) {
+            if (!cmd.trim().isEmpty()) {
+            	stmt.execute(cmd.trim());
+            }
+        }
+        
+        stmt.close();
+	}
+	
+	public static String[] getSkinHashes() throws SQLException {
+		Statement stmt = getConnection().createStatement();
+		ResultSet resultSet = stmt.executeQuery("SELECT _hash FROM skin;");
+		
+		List<String> hashes = new ArrayList<String>();
+		while (resultSet.next()) {
+			hashes.add(resultSet.getString("_hash"));
+		}
+		stmt.close();
+		
+		return hashes.toArray(new String[0]);
+	}
+	
+	public static HashLabelPair[] getSkinHashesAndLabels() throws SQLException {
+		Statement stmt = getConnection().createStatement();
+		ResultSet resultSet = stmt.executeQuery("SELECT _hash, label FROM skin;");
+		
+		List<HashLabelPair> pairs = new ArrayList<HashLabelPair>();
+		while (resultSet.next()) {
+			pairs.add(new HashLabelPair(
+					resultSet.getString("_hash"),
+					resultSet.getString("label")
+				));
+		}
+		stmt.close();
+		
+		return pairs.toArray(new HashLabelPair[0]);
+	}
+	
+	public static Skin[] getSkins() throws SQLException {
+		Statement stmt = getConnection().createStatement();
+		ResultSet resultSet = stmt.executeQuery("SELECT * FROM skin;");
+		
+		List<Skin> skins = new ArrayList<Skin>();
+		while (resultSet.next()) {
+			skins.add(new Skin(
+				resultSet.getInt("id"),
+				resultSet.getString("_hash"),
+				resultSet.getString("label"),
+				resultSet.getBoolean("slim"),
+				resultSet.getBytes("png"),
+				resultSet.getBytes("png_old")
+			));
+		}
+		stmt.close();
+		
+		return skins.toArray(new Skin[0]);
+	}
+	
+	public static Skin getSkin(String hash) throws SQLException {
+		PreparedStatement stmt = getConnection().prepareStatement("SELECT * FROM skin WHERE _hash = ?;");
+		
+		stmt.setString(1, hash);
+		ResultSet resultSet = stmt.executeQuery();
+		
+		if (!resultSet.next())
+			return null;
+		
+		Skin skin = new Skin(
+				resultSet.getInt("id"),
+				resultSet.getString("_hash"),
+				resultSet.getString("label"),
+				resultSet.getBoolean("slim"),
+				resultSet.getBytes("png"),
+				resultSet.getBytes("png_old")
+			);
+		stmt.close();
+		
+		return skin;
+	}
+	
+	public static void addSkin(Skin skin) throws SQLException {
+		PreparedStatement  stmt = getConnection().prepareStatement(
+				"INSERT INTO skin(_hash, label, slim, png, png_old) VALUES(?, ?, ?, ?, ?);"
+			);
+
+		stmt.setString  ( 1, skin.getHash()   );
+		stmt.setString  ( 2, skin.getLabel()  );
+		stmt.setBoolean ( 3, skin.getSlim()   );
+		stmt.setBytes   ( 4, skin.getPng()    );
+		stmt.setBytes   ( 5, skin.getPngOld() );
+		
+		stmt.execute();
+		stmt.close();
+	}
+	
+	public static Profile[] getProfiles() throws SQLException {
+		assert(false);
+		Statement stmt = getConnection().createStatement();
+		ResultSet resultSet = stmt.executeQuery("SELECT profile.* FROM profile AS profile JOIN skin AS skin ON profile.skin = skin.id;");
+		
+		List<Profile> profiles = new ArrayList<Profile>();
+		while (resultSet.next()) {
+			// TODO
+		}
+		stmt.close();
+		
+		return profiles.toArray(new Profile[0]);
+	}
+	
+	private boolean errored = false;
+	private SQLException exception;
+	private Connection connection;
+}

app/src/main/java/org/skinner/HashLabelPair.java

@@ -0,0 +1,18 @@
+package org.skinner;
+
+public class HashLabelPair {
+	
+	public HashLabelPair(String hash, String label) {
+		this.hash = hash;
+		this.label = label;
+	}
+	public String getHash() {
+		return hash;
+	}
+	public String getLabel() {
+		return label;
+	}
+	String hash;
+	String label;
+
+}

app/src/main/java/org/skinner/MultipartForm.java

@@ -0,0 +1,102 @@
+package org.skinner;
+
+import java.io.*;
+import java.nio.charset.StandardCharsets;
+import java.util.*;
+
+import com.sun.net.httpserver.*;
+
+public class MultipartForm {
+
+	public MultipartForm(HttpExchange exchange) throws MultipartFormException, IOException {
+		parseFormBody(
+				exchange.getRequestBody().readAllBytes(),
+				exchange.getRequestHeaders().getFirst("Content-Type")
+			);
+	}
+	
+	public MultipartForm(InputStream is, String contentType) throws MultipartFormException, IOException {
+		parseFormBody(is.readAllBytes(), contentType);
+	}
+	
+	public MultipartForm(byte[] body, String contentType) throws MultipartFormException, IOException {
+		parseFormBody(body, contentType);
+	}
+	
+	protected void parseFormBody(byte[] body, String contentType) throws MultipartFormException, IOException {
+		this.data = new HashMap<String, byte[]>();
+		
+		String[] headerParts = contentType.split(";");
+		if (!headerParts[0].strip().equals("multipart/form-data"))
+			throw new MultipartFormException("Invalid Content-Type header, expected multipart/form-data");
+		if (headerParts.length == 1)
+			throw new MultipartFormException("Missing boundary field");
+		
+		String boundary = null;
+		for (String headerPart : headerParts) {
+			String[] parts = headerPart.strip().split("=");
+			if (!parts[0].equals("boundary"))
+				continue;
+			boundary = parts[1].strip();
+		}
+		
+		if (boundary == null)
+			throw new MultipartFormException("Missing boundary field in Content-Type header");
+		
+		String[] lines = new String(body, StandardCharsets.ISO_8859_1).split("\r\n");
+		String name = null;
+		String current = "";
+		boolean header = false;
+		for (String line : lines) {
+			if (line.equals("--"+boundary) || line.equals("--"+boundary+"--")) {
+				if (name != null) {
+					// We remove the last appended \r\n
+					data.put(name, current.substring(0, current.length()-2).getBytes(StandardCharsets.ISO_8859_1));
+				}
+				name = null;
+				current = "";
+				header = true;
+				
+				if (line.equals("--"+boundary+"--")) {
+					break;
+				}
+			}
+			
+			if (header) {
+				if (line.equals("")) {
+					header = false;
+					continue;
+				}
+				String[] headerField = line.split(":", 2);
+				if (headerField[0].strip().equals("Content-Disposition")) {
+					for (String part : headerField[1].split(";")) {
+						if (!part.strip().startsWith("name=\""))
+							continue;
+						name = part.split("=", 2)[1].strip();      // Separate out the "name" value
+						name = name.substring(1, name.length()-1); // Remove quotes from around the value
+					}
+				}
+			} else {
+				current += line + "\r\n";
+			}
+		}
+	}
+	
+	public boolean contains(String name) {
+		return data.containsKey(name);
+	}
+	
+	public byte[] get(String name) {
+		return data.get(name);
+	}
+	
+	public String getString(String name) {
+		if (this.contains(name))
+			return new String(data.get(name));
+		else
+			return null;
+	}
+	
+	private HashMap<String, byte[]> data;
+
+}

app/src/main/java/org/skinner/MultipartFormException.java

@@ -0,0 +1,27 @@
+package org.skinner;
+
+public class MultipartFormException extends Exception {
+
+	private static final long serialVersionUID = 2845196104721963218L;
+
+	public MultipartFormException() {
+	}
+
+	public MultipartFormException(String message) {
+		super(message);
+	}
+
+	public MultipartFormException(Throwable cause) {
+		super(cause);
+	}
+
+	public MultipartFormException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public MultipartFormException(String message, Throwable cause, boolean enableSuppression,
+			boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+}

app/src/main/java/org/skinner/Profile.java

@@ -0,0 +1,35 @@
+package org.skinner;
+
+import org.skinner.json.*;
+
+public class Profile implements JSON {
+	public Profile(int id, String uuid, Skin skin) {
+		this.id = id;
+		this.uuid = uuid;
+		this.skin = skin;
+	}
+	
+	public int getId() {
+		return id;
+	}
+	
+	public String getUuid() {
+		return uuid;
+	}
+	
+	public Skin getSkin() {
+		return skin;
+	}
+	
+	public JSONValue toJSON() {
+		JSONObject object = new JSONObject();
+		object.put("id", JSON.from(id));
+		object.put("uuid", JSON.from(uuid));
+		object.put("skin", skin.toJSON());
+		return object;
+	}
+
+	private int id;
+	private String uuid;
+	private Skin skin;
+}

app/src/main/java/org/skinner/Query.java

@@ -0,0 +1,24 @@
+package org.skinner;
+
+import java.util.HashMap;
+
+public class Query extends HashMap<String, String> {
+
+	private static final long serialVersionUID = 2095589600265440673L;
+
+	public Query(String query) {
+		// There's no data, empty map is OK :)
+		if (query == null)
+			return;
+
+		String[] pairStrings = query.split("&");
+		for (String pairString : pairStrings) {
+			String[] pair = pairString.split("=", 2);
+			if (pair.length == 1)
+				this.put(pair[0], "");
+			else
+				this.put(pair[0], pair[1]);
+		}
+	}
+
+}

app/src/main/java/org/skinner/ResourceServer.java

@@ -0,0 +1,66 @@
+package org.skinner;
+
+import java.io.InputStream;
+import java.net.URI;
+import java.util.HashMap;
+import java.util.zip.GZIPInputStream;
+
+import com.sun.net.httpserver.HttpExchange;
+
+public class ResourceServer extends SafeHttpHandler {
+
+	public ResourceServer(String root, String fileRoot) {
+		super(root);
+		this.fileRoot = fileRoot;
+	}
+
+	protected void handle(HttpExchange exchange, URI uri) throws Exception {
+		String path = uri.getPath();
+		if (path.endsWith("/"))
+			path += "index.html";
+		String mime = mimeDB.get(path.substring(path.indexOf('.')+1));
+		InputStream resource = WebApp.class.getResourceAsStream(fileRoot + path);
+		if (resource == null) {
+			notFound(exchange, uri);
+			return;
+		}
+		if (path.endsWith(".gz")) {
+			resource = new GZIPInputStream(resource);
+			mime = mimeDB.get(
+					path
+					.substring(0, path.length()-3)
+					.substring(path.indexOf('.')+1)
+				);
+		}
+		byte[] data = resource.readAllBytes();
+		
+		exchange.getResponseHeaders().add("Content-Type", mime);
+		exchange.sendResponseHeaders(200, data.length);
+		exchange.getResponseBody().write(data);
+		exchange.close();
+	}
+	
+	protected void notFound(HttpExchange exchange, URI uri) throws Exception {
+		String response = "Resource not found.";
+		
+		exchange.getResponseHeaders().add("Content-Type", "text/plain");
+		exchange.sendResponseHeaders(404, response.length());
+		exchange.getResponseBody().write(response.getBytes());
+		exchange.close();
+	}
+	
+	private static HashMap<String, String> mimeDB = new HashMap<String, String>() {
+		private static final long serialVersionUID = 2652944319747004387L;
+	{
+		put("txt", "text/plain");
+		put("html", "text/html");
+		put("css", "text/css");
+		
+		put("png", "image/png");
+		
+		put("js", "application/javascript");
+	}};
+	
+	private String fileRoot;
+
+}

app/src/main/java/org/skinner/RestAPI.java

@@ -0,0 +1,134 @@
+package org.skinner;
+
+import java.io.*;
+import java.net.URI;
+
+import org.skinner.json.*;
+
+import com.sun.net.httpserver.*;
+
+public class RestAPI extends SafeHttpHandler {
+	
+	RestAPI(String root) {
+		super(root);
+	}
+
+	protected void handle(HttpExchange exchange, URI uri) throws Exception {
+		String path = uri.getPath();
+		switch (exchange.getRequestMethod().toUpperCase())
+		{
+		case "GET":
+			switch (path)
+			{
+			case "/skins":
+				getSkins(exchange);
+				return;
+				
+			// Template-ish routes
+			default:
+				if (path.startsWith("/skin/")) {
+					getSkin(exchange, uri);
+					return;
+				}
+				break;
+			}
+			break;
+			
+		case "POST":
+			switch (path)
+			{
+			case "/skin":
+				addSkin(exchange);
+				return;
+
+			// Template-ish routes
+			default:
+				break;
+			}
+			break;
+		}
+		Headers headers = exchange.getResponseHeaders();
+		headers.add("Content-Type", "text/plain");
+		
+		byte[] response = "Missing API endpoint".getBytes();
+		exchange.sendResponseHeaders(404, response.length);
+		exchange.getResponseBody().write(response);
+		exchange.close();
+		return;
+	}
+	
+	protected void getSkin(HttpExchange exchange, URI uri) throws Exception {
+		String[] pathParts = uri.getPath().split("/");
+		String hash = pathParts[pathParts.length-1].split("\\.")[0];
+		
+		Skin skin = Database.getSkin(hash);
+		if (skin == null) {
+			notfound(exchange, "Skin not found");
+			return;
+		}
+		
+		Query query = new Query(uri.getQuery());
+		
+		byte[] response = query.getOrDefault("legacy", "false").toLowerCase().equals("true") ?
+				skin.getPngOld() :
+				skin.getPng();
+		exchange.getResponseHeaders().add("Content-Type", "image/png");
+		exchange.sendResponseHeaders(200, response.length);
+		exchange.getResponseBody().write(response);
+		exchange.close();
+	}
+	
+	protected void getSkins(HttpExchange exchange) throws Exception {
+		HashLabelPair[] pairs = Database.getSkinHashesAndLabels();
+		
+		JSONArray array = new JSONArray();
+		for (HashLabelPair pair : pairs) {
+			JSONObject object = new JSONObject();
+			object.put("hash", JSON.from(pair.getHash()));
+			object.put("label", JSON.from(pair.getLabel()));
+			object.put("png", JSON.from(getRoot() + "skin/"+pair.getHash()+".png"));
+			object.put("png_old", JSON.from(getRoot() + "skin/"+pair.getHash()+".png?legacy=true"));
+			array.add(object);
+		}
+		
+		byte[] response = array.toString().getBytes();
+		exchange.getResponseHeaders().add("Content-Type", "application/json");
+		exchange.sendResponseHeaders(200, response.length);
+		exchange.getResponseBody().write(response);
+		exchange.close();
+	}
+	
+	protected void getSkinsFull(HttpExchange exchange) throws Exception {
+		Skin[] skins = Database.getSkins();
+		
+		JSONArray array = new JSONArray();
+		for (Skin skin : skins) {
+			JSONObject object = new JSONObject();
+			object.put("hash", JSON.from(skin.getHash()));
+			object.put("png", JSON.from(getRoot() + "skin/"+skin.getHash()+".png"));
+			object.put("png_old", JSON.from(getRoot() + "skin/"+skin.getHash()+".png?legacy=true"));
+			array.add(object);
+		}
+		
+		byte[] response = array.toString().getBytes();
+		exchange.getResponseHeaders().add("Content-Type", "application/json");
+		exchange.sendResponseHeaders(200, response.length);
+		exchange.getResponseBody().write(response);
+		exchange.close();
+	}
+	
+	protected void addSkin(HttpExchange exchange) throws Exception {
+		MultipartForm form = new MultipartForm(exchange);
+		
+		if (!form.contains("skin")) {
+			fail(exchange, "Expected \"skin\" field not provided");
+			return;
+		}
+		
+		InputStream is = new ByteArrayInputStream(form.get("skin"));
+		Skin skin = Skin.loadFromImage(is, form.getString("label"));
+		Database.addSkin(skin);
+		ok(exchange);
+	}
+	
+}

app/src/main/java/org/skinner/SafeHttpHandler.java

@@ -0,0 +1,66 @@
+package org.skinner;
+
+import java.io.IOException;
+import java.net.URI;
+
+import com.sun.net.httpserver.*;
+
+public abstract class SafeHttpHandler implements HttpHandler {
+	public SafeHttpHandler(String root) {
+		this.root = root;
+	}
+
+	public void handle(HttpExchange exchange) throws IOException {
+		try {
+			URI uri = new URI(
+					exchange
+					.getRequestURI()
+					.toString()
+					.replaceFirst("^"+root+"/*", "/")
+			);
+			handle(exchange, uri);
+		} catch (IOException exception) {
+			// Maybe network error, don't print to console
+			fail(exchange, exception.toString());
+		} catch (Exception exception) {
+			exception.printStackTrace();
+			fail(exchange, exception.toString());
+		}
+	}
+	
+	public String getRoot() {
+		return root;
+	}
+	
+	protected void text(HttpExchange exchange, int code, String message) throws IOException {
+		String response = message;
+		exchange.getResponseHeaders().add("Content-Type", "text/plain");
+		exchange.sendResponseHeaders(code, response.length());
+		exchange.getResponseBody().write(response.getBytes());
+		exchange.close();
+	}
+	
+	protected void fail(HttpExchange exchange, String message) throws IOException {
+		text(exchange, 500, message);
+	}
+	
+	protected void notfound(HttpExchange exchange, String message) throws IOException {
+		text(exchange, 404, message);
+	}
+	
+	protected void notfound(HttpExchange exchange) throws IOException {
+		notfound(exchange, "Not Found");
+	}
+	
+	protected void ok(HttpExchange exchange, String message) throws IOException {
+		text(exchange, 200, message);
+	}
+	
+	protected void ok(HttpExchange exchange) throws IOException {
+		ok(exchange, "Ok");
+	}
+	
+	protected abstract void handle(HttpExchange exchange, URI uri) throws Exception;
+	
+	private String root;
+}

app/src/main/java/org/skinner/Skin.java

@@ -0,0 +1,171 @@
+package org.skinner;
+
+import java.awt.*;
+import java.awt.image.*;
+import java.io.*;
+import java.security.*;
+import java.util.*;
+import java.util.Base64.Encoder;
+
+import javax.imageio.*;
+
+import org.skinner.json.*;
+
+public class Skin implements JSON {
+	Skin(int id, String hash, String label, boolean slim, byte[] png, byte[] png_old) {
+		this.id = id;
+		this.hash = hash;
+		this.label = label;
+		this.slim = slim;
+		this.png = png;
+		this.png_old = png_old;
+	}
+	
+	public int getId() {
+		return id;
+	}
+	
+	public String getHash() {
+		return hash;
+	}
+	
+	public String getLabel() {
+		return label;
+	}
+	
+	public boolean getSlim() {
+		return slim;
+	}
+
+	public byte[] getPng() {
+		return png;
+	}
+
+	public byte[] getPngOld() {
+		return png_old;
+	}
+	
+	public JSONValue toJSON() {
+		Encoder encoder = Base64.getEncoder();
+		JSONObject object = new JSONObject();
+		object.put("id", JSON.from(id));
+		object.put("hash", JSON.from(hash));
+		object.put("label", JSON.from(label));
+		object.put("slim", JSON.from(slim));
+		object.put("png", JSON.from(encoder.encodeToString(png)));
+		object.put("png_old", JSON.from(encoder.encodeToString(png_old)));
+		return object;
+	}
+
+	private int id;
+	private String hash;
+	private String label;
+	private boolean slim;
+	private byte[] png;
+	private byte[] png_old;
+	
+	public static Skin loadFromImage(InputStream is, String label) throws SkinException, IOException, NoSuchAlgorithmException {
+		BufferedImage image = ImageIO.read(is);
+		int width = image.getWidth();
+		int height = image.getHeight();
+		
+		if (width != 64)
+			throw new SkinException("Invalid skin width, must be 64");
+		
+		if (height != 32 && height != 64)
+			throw new SkinException("Invalid skin height, must be 32 or 64");
+
+        byte[] imageData = new byte[width * height * 3];
+
+        for (int y = 0; y < height; y++) {
+            for (int x = 0; x < width; x++) {
+                int rgb = image.getRGB(x, y);
+                imageData[(y * width + x) * 3] = (byte) ((rgb >> 16) & 0xFF);
+                imageData[(y * width + x) * 3 + 1] = (byte) ((rgb >> 8) & 0xFF);
+                imageData[(y * width + x) * 3 + 2] = (byte) (rgb & 0xFF);
+            }
+        }
+
+        MessageDigest digest = MessageDigest.getInstance("SHA-256");
+        byte[] hashBytes = digest.digest(imageData);
+        
+        StringBuilder hexString = new StringBuilder();
+        for (byte b : hashBytes) {
+            String hex = Integer.toHexString(0xff & b);
+            if (hex.length() == 1) {
+                hexString.append('0');
+            }
+            hexString.append(hex);
+        }
+        
+        String hash = hexString.toString();
+        boolean slim = false;
+
+		BufferedImage image_png;
+		BufferedImage image_png_old;
+		if (height == 64) { // We got 64x64 skin
+			image_png = image;
+			image_png_old = new BufferedImage(64, 32, BufferedImage.TYPE_INT_ARGB);
+			
+			int transparent = image.getRGB(63, 0);
+			slim = (
+					matchAreaRGB(image, transparent, 50, 16,  2,  4) ||
+					matchAreaRGB(image, transparent, 54, 20,  2, 12) ||
+					matchAreaRGB(image, transparent, 42, 48,  2,  4) ||
+					matchAreaRGB(image, transparent, 46, 52,  2, 12)
+				);
+
+			Graphics graphics = image_png_old.getGraphics();
+			graphics.drawImage(image_png, 0, 0, 64, 32, 0, 0, 64, 32, null);
+			
+			if (slim) {
+				graphics.drawImage(image_png, 48, 16, 51, 20, 47, 16, 50, 20, null); // Move palm
+				graphics.drawImage(image_png, 51, 16, 52, 20, 49, 16, 50, 20, null); // Extend palm
+				graphics.drawImage(image_png, 47, 16, 48, 20, 46, 16, 47, 20, null); // Extend shoulder
+				
+				graphics.drawImage(image_png, 48, 20, 55, 32, 47, 20, 54, 32, null); // Move right part
+				graphics.drawImage(image_png, 55, 20, 56, 32, 53, 20, 54, 32, null); // Extend right arm
+				graphics.drawImage(image_png, 47, 20, 48, 32, 46, 20, 47, 32, null); // Extend left arm
+			}
+			
+			fillAreaRGB(image_png_old, transparent, 32, 0, 32, 16);
+			graphics.dispose();
+		} else { // We got 64x32 skin
+			image_png = new BufferedImage(64, 64, BufferedImage.TYPE_INT_ARGB);
+			image_png_old = image;
+			image_png_old.getGraphics().drawImage(image_png, 0, 0, 64, 32, 0, 0, 64, 32, null);
+		}
+		
+		ByteArrayOutputStream  baos_png = new ByteArrayOutputStream();
+		ByteArrayOutputStream  baos_png_old = new ByteArrayOutputStream();
+
+		ImageIO.write(image_png,  "png", baos_png);
+		ImageIO.write(image_png_old,  "png", baos_png_old);
+		
+		baos_png.flush();
+		baos_png_old.flush();
+		
+		byte[] png = baos_png.toByteArray();
+		byte[] png_old = baos_png_old.toByteArray();
+		
+		return new Skin(-1, hash, label, slim, png, png_old);
+	}
+	
+	private static boolean matchAreaRGB(BufferedImage image, int rgb, int x, int y, int w, int h) {
+		int endX = x + w;
+		int endY = y + h;
+		for (int i = y; i < endY; i++)
+			for (int j = x; j < endX; j++)
+				if (image.getRGB(j, i) != rgb)
+					return false;
+		return true;
+	}
+	
+	private static void fillAreaRGB(BufferedImage image, int rgb, int x, int y, int w, int h) {
+		int endX = x + w;
+		int endY = y + h;
+		for (int i = y; i < endY; i++)
+			for (int j = x; j < endX; j++)
+				image.setRGB(j, i, rgb);
+	}
+}

app/src/main/java/org/skinner/SkinException.java

@@ -0,0 +1,26 @@
+package org.skinner;
+
+public class SkinException extends Exception {
+
+	private static final long serialVersionUID = -6173355382058208518L;
+
+	public SkinException() {
+	}
+
+	public SkinException(String message) {
+		super(message);
+	}
+
+	public SkinException(Throwable cause) {
+		super(cause);
+	}
+
+	public SkinException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public SkinException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+}

app/src/main/java/org/skinner/WebApp.java

@@ -0,0 +1,25 @@
+package org.skinner;
+
+import java.io.*;
+import java.net.*;
+
+import com.sun.net.httpserver.*;
+
+public class WebApp {
+	
+    public static void main(String[] args) throws IOException {
+        // Create an HttpServer instance
+        HttpServer server = HttpServer.create(new InetSocketAddress(8000), 0);
+
+        // Create a context for a specific path and set the handler
+        server.createContext("/api/", new RestAPI("/api/"));
+        server.createContext("/", new ResourceServer("/", "/www"));
+
+        // Start the server
+        server.setExecutor(null); // Use the default executor
+        server.start();
+
+        System.out.println("Server is running on port 8000");
+    }
+    
+}

app/src/main/java/org/skinner/json/JSON.java

@@ -0,0 +1,39 @@
+package org.skinner.json;
+
+import java.util.*;
+
+public interface JSON {
+	JSONValue toJSON();
+	
+	public static JSONBoolean from(boolean value) {
+		return new JSONBoolean(value);
+	}
+	
+	public static JSONString from(String value) {
+		return new JSONString(value);
+	}
+	
+	public static JSONInt from(int value) {
+		return new JSONInt(value);
+	}
+	
+	public static JSONFloat from(float value) {
+		return new JSONFloat(value);
+	}
+	
+	public static JSONArray from(JSONValue[] array) {
+		return JSON.from(Arrays.asList(array));
+	}
+	
+	public static JSONArray from(Collection<JSONValue> list) {
+		return new JSONArray(list);
+	}
+	
+	public static JSONObject from(Map<? extends String, ? extends JSONValue> map) {
+		return new JSONObject(map);
+	}
+	
+	public static JSONValue from(JSON object) {
+		return object.toJSON();
+	}
+}

app/src/main/java/org/skinner/json/JSONArray.java

@@ -0,0 +1,34 @@
+package org.skinner.json;
+
+import java.util.*;
+
+public class JSONArray extends ArrayList<JSONValue> implements JSONValue {
+
+	public JSONArray() {
+		super();
+	}
+
+	public JSONArray(Collection<? extends JSONValue> c) {
+		super(c);
+	}
+
+	public JSONArray(int initialCapacity) {
+		super(initialCapacity);
+	}
+
+	private static final long serialVersionUID = 4112322940331064783L;
+
+	public JSONType getType() {
+		return JSONType.ARRAY;
+	}
+	
+	public String toString() {
+		if (this.size() == 0)
+			return "[]";
+		String string = "[";
+		for (JSONValue value : this)
+			string += value.toString() + ",";
+		return string.substring(0, string.length()-1) + "]";
+	}
+
+}

app/src/main/java/org/skinner/json/JSONBoolean.java

@@ -0,0 +1,27 @@
+package org.skinner.json;
+
+public class JSONBoolean implements JSONValue {
+
+	public JSONBoolean(boolean value) {
+		this.value = value;
+	}
+
+	public JSONType getType() {
+		return JSONType.BOOLEAN;
+	}
+
+	public boolean get() {
+		return value;
+	}
+
+	public void set(boolean value) {
+		this.value = value;
+	}
+	
+	public String toString() {
+		return value ? "true" : "false";
+	}
+	
+	private boolean value;
+
+}

app/src/main/java/org/skinner/json/JSONException.java

@@ -0,0 +1,26 @@
+package org.skinner.json;
+
+public class JSONException extends Exception {
+
+	private static final long serialVersionUID = -7810908399955135495L;
+
+	public JSONException() {
+	}
+
+	public JSONException(String message) {
+		super(message);
+	}
+
+	public JSONException(Throwable cause) {
+		super(cause);
+	}
+
+	public JSONException(String message, Throwable cause) {
+		super(message, cause);
+	}
+
+	public JSONException(String message, Throwable cause, boolean enableSuppression, boolean writableStackTrace) {
+		super(message, cause, enableSuppression, writableStackTrace);
+	}
+
+}

app/src/main/java/org/skinner/json/JSONFloat.java

@@ -0,0 +1,27 @@
+package org.skinner.json;
+
+public class JSONFloat implements JSONValue {
+
+	public JSONFloat(float value) {
+		this.value = value;
+	}
+
+	public JSONType getType() {
+		return JSONType.FLOAT;
+	}
+
+	public float get() {
+		return value;
+	}
+
+	public void set(float value) {
+		this.value = value;
+	}
+	
+	public String toString() {
+		return String.valueOf(value);
+	}
+	
+	private float value;
+
+}

app/src/main/java/org/skinner/json/JSONInt.java

@@ -0,0 +1,27 @@
+package org.skinner.json;
+
+public class JSONInt implements JSONValue {
+
+	public JSONInt(int value) {
+		this.value = value;
+	}
+
+	public JSONType getType() {
+		return JSONType.INT;
+	}
+
+	public int get() {
+		return value;
+	}
+
+	public void set(int value) {
+		this.value = value;
+	}
+	
+	public String toString() {
+		return String.valueOf(value);
+	}
+	
+	private int value;
+
+}

app/src/main/java/org/skinner/json/JSONNull.java

@@ -0,0 +1,16 @@
+package org.skinner.json;
+
+public class JSONNull implements JSONValue {
+
+	public JSONNull() {
+	}
+
+	public JSONType getType() {
+		return JSONType.NULL;
+	}
+	
+	public String toString() {
+		return "null";
+	}
+
+}

app/src/main/java/org/skinner/json/JSONObject.java

@@ -0,0 +1,38 @@
+package org.skinner.json;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class JSONObject extends HashMap<String, JSONValue> implements JSONValue {
+
+	private static final long serialVersionUID = -1228642117432870512L;
+
+	public JSONObject() {
+	}
+
+	public JSONObject(int initialCapacity) {
+		super(initialCapacity);
+	}
+
+	public JSONObject(Map<? extends String, ? extends JSONValue> m) {
+		super(m);
+	}
+
+	public JSONObject(int initialCapacity, float loadFactor) {
+		super(initialCapacity, loadFactor);
+	}
+
+	public JSONType getType() {
+		return JSONType.OBJECT;
+	}
+	
+	public String toString() {
+		if (this.size() == 0)
+			return "{}";
+		String string = "{";
+		for (Map.Entry<String, JSONValue> entry : this.entrySet())
+			string += "\"" + JSONString.project(entry.getKey()) + "\":" + entry.getValue().toString() + ",";
+		return string.substring(0, string.length()-1) + "}";
+	}
+
+}

app/src/main/java/org/skinner/json/JSONString.java

@@ -0,0 +1,44 @@
+package org.skinner.json;
+
+public class JSONString implements JSONValue {
+
+	public JSONString(String value) {
+		this.value = value;
+	}
+
+	public JSONType getType() {
+		return JSONType.STRING;
+	}
+
+	public String get() {
+		return value;
+	}
+
+	public void set(String value) {
+		this.value = value;
+	}
+	
+	public String toString() {
+		if (value == null)
+			return new JSONNull().toString();
+		else
+			return "\"" + project(value) + "\"";
+	}
+	
+	static public String project(String value) {
+		// NOTE: This function is not fully implemented, and supports features only
+		// required within current project scope.
+		return value
+				.replace("\\", "\\\\")
+		        .replace("\t", "\\t")
+		        .replace("\b", "\\b")
+		        .replace("\n", "\\n")
+		        .replace("\r", "\\r")
+		        .replace("\f", "\\f")
+		        .replace("\'", "\\'")
+		        .replace("\"", "\\\"");
+	}
+	
+	private String value;
+
+}

app/src/main/java/org/skinner/json/JSONType.java

@@ -0,0 +1,11 @@
+package org.skinner.json;
+
+public enum JSONType {
+	NULL,
+	BOOLEAN,
+	INT,
+	FLOAT,
+	STRING,
+	ARRAY,
+	OBJECT;
+}

app/src/main/java/org/skinner/json/JSONValue.java

@@ -0,0 +1,9 @@
+package org.skinner.json;
+
+public interface JSONValue {
+	
+	public JSONType getType();
+	
+	public String toString();
+	
+}

app/src/main/resources/sql/init.sql

@@ -0,0 +1,28 @@
+CREATE TABLE IF NOT EXISTS skin(
+	id INTEGER PRIMARY KEY AUTO_INCREMENT,
+	_hash VARCHAR(64) UNIQUE NOT NULL,
+	label TEXT,
+	slim BOOLEAN NOT NULL,
+	png BLOB NOT NULL,
+	png_old BLOB NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS profile(
+	id INTEGER PRIMARY KEY AUTO_INCREMENT,
+	username TEXT NOT NULL,
+	uuid VARCHAR(36) UNIQUE NOT NULL,
+	skin INTEGER NOT NULL,
+	FOREIGN KEY (skin) REFERENCES skin(id)
+);
+
+CREATE TABLE IF NOT EXISTS tag(
+	id INTEGER PRIMARY KEY AUTO_INCREMENT,
+	label TEXT
+);
+
+CREATE TABLE IF NOT EXISTS skin_tag(
+	skin INTEGER NOT NULL,
+	tag INTEGER NOT NULL,
+	FOREIGN KEY (skin) REFERENCES skin(id),
+	FOREIGN KEY (tag) REFERENCES tag(id)
+);

app/src/main/resources/www/api.js

@@ -0,0 +1,5 @@
+api = {
+	getSkins: async function() {
+		return fetch("api/skins").then(res=>res.json());
+	},
+};

app/src/main/resources/www/index.html

@@ -0,0 +1,25 @@
+<!DOCTYPE html>
+<html>
+	<head>
+		<link rel="stylesheet" href="thirdparty/simple.css.gz">
+		<script src="api.js"></script>
+		<script src="thirdparty/skinview3d.js.gz"></script>
+		<script src="thirdparty/alpine.js.gz" defer></script>
+		<title>Skinner</title>
+	</head>
+	<body>
+		<h1>Skinner</h1>
+		<article>
+			<form method="POST" action="api/skin" enctype="multipart/form-data">
+				<input name="label" type="text" placeholder="Skin name">
+				<input name="skin" type="file" required>
+				<input type="submit" value="Add new skin">
+			</form>
+		</article>
+		<div x-data="{skins: api.getSkins()}">
+			<template x-for="skin in skins">
+				<p x-text="skin.label + ' <<>> ' + skin.hash"></p>
+			</template>
+		</div>
+	</body>
+</html>

gradle.properties

@@ -0,0 +1,5 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/build_environment.html#sec:gradle_configuration_properties
+
+org.gradle.configuration-cache=true
+

gradle/libs.versions.toml

@@ -0,0 +1,10 @@
+# This file was generated by the Gradle 'init' task.
+# https://docs.gradle.org/current/userguide/platforms.html#sub::toml-dependencies-format
+
+[versions]
+guava = "33.4.5-jre"
+junit-jupiter = "5.12.1"
+
+[libraries]
+guava = { module = "com.google.guava:guava", version.ref = "guava" }
+junit-jupiter = { module = "org.junit.jupiter:junit-jupiter", version.ref = "junit-jupiter" }

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1,14 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ *
+ * The settings file is used to specify which projects to include in your build.
+ * For more detailed information on multi-project builds, please refer to https://docs.gradle.org/8.14/userguide/multi_project_builds.html in the Gradle documentation.
+ */
+
+plugins {
+    // Apply the foojay-resolver plugin to allow automatic download of JDKs
+    id 'org.gradle.toolchains.foojay-resolver-convention' version '0.10.0'
+}
+
+rootProject.name = 'skinner'
+include('app')