Init

1 files changed, 185 insertions, 0 deletions

diff --git a/src/main/java/moe/nea/ultranotifier/init/NeaMixinConfig.java b/src/main/java/moe/nea/ultranotifier/init/NeaMixinConfig.java
new file mode 100644
index 0000000..a3fc4fc
--- /dev/null
+++ b/src/main/java/moe/nea/ultranotifier/init/NeaMixinConfig.java
@@ -0,0 +1,185 @@
+package moe.nea.ultranotifier.init;
+
+//#if MC < 11404
+//$$import org.spongepowered.asm.lib.tree.ClassNode;
+//#else
+import org.objectweb.asm.tree.ClassNode;
+//#endif
+import org.spongepowered.asm.mixin.extensibility.IMixinConfigPlugin;
+import org.spongepowered.asm.mixin.extensibility.IMixinInfo;
+
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.net.URISyntaxException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.stream.Stream;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipInputStream;
+
+public class NeaMixinConfig implements IMixinConfigPlugin {
+
+	private static final List<NeaMixinConfig> mixinPlugins = new ArrayList<>();
+
+	public static List<NeaMixinConfig> getMixinPlugins() {
+		return mixinPlugins;
+	}
+
+	private String mixinPackage;
+
+	@Override
+	public void onLoad(String mixinPackage) {
+		this.mixinPackage = mixinPackage;
+		mixinPlugins.add(this);
+	}
+
+	/**
+	 * Resolves the base class root for a given class URL. This resolves either the JAR root, or the class file root.
+	 * In either case the return value of this + the class name will resolve back to the original class url, or to other
+	 * class urls for other classes.
+	 */
+	public URL getBaseUrlForClassUrl(URL classUrl) {
+		String string = classUrl.toString();
+		if (classUrl.getProtocol().equals("jar")) {
+			try {
+				return new URL(string.substring(4).split("!")[0]);
+			} catch (MalformedURLException e) {
+				throw new RuntimeException(e);
+			}
+		}
+		if (string.endsWith(".class")) {
+			try {
+				return new URL(string.replace("\\", "/")
+						.replace(getClass().getCanonicalName()
+								.replace(".", "/") + ".class", ""));
+			} catch (MalformedURLException e) {
+				throw new RuntimeException(e);
+			}
+		}
+		return classUrl;
+	}
+
+	/**
+	 * Get the package that contains all the mixins. This value is set by mixin itself using {@link #onLoad}.
+	 */
+	public String getMixinPackage() {
+		return mixinPackage;
+	}
+
+	/**
+	 * Get the path inside the class root to the mixin package
+	 */
+	public String getMixinBaseDir() {
+		return mixinPackage.replace(".", "/");
+	}
+
+	/**
+	 * A list of all discovered mixins.
+	 */
+	private List<String> mixins = null;
+
+	/**
+	 * Try to add mixin class ot the mixins based on the filepath inside of the class root.
+	 * Removes the {@code .class} file suffix, as well as the base mixin package.
+	 * <p><b>This method cannot be called after mixin initialization.</p>
+	 *
+	 * @param className the name or path of a class to be registered as a mixin.
+	 */
+	public void tryAddMixinClass(String className) {
+		String norm = (className.endsWith(".class") ? className.substring(0, className.length() - ".class".length()) : className)
+				.replace("\\", "/")
+				.replace("/", ".");
+		if (norm.startsWith(getMixinPackage() + ".") && !norm.endsWith(".")) {
+			mixins.add(norm.substring(getMixinPackage().length() + 1));
+		}
+	}
+
+	/**
+	 * Search through the JAR or class directory to find mixins contained in {@link #getMixinPackage()}
+	 */
+	@Override
+	public List<String> getMixins() {
+		if (mixins != null) return mixins;
+		System.out.println("Trying to discover mixins");
+		mixins = new ArrayList<>();
+		URL classUrl = getClass().getProtectionDomain().getCodeSource().getLocation();
+		System.out.println("Found classes at " + classUrl);
+		Path file;
+		try {
+			file = Paths.get(getBaseUrlForClassUrl(classUrl).toURI());
+		} catch (URISyntaxException e) {
+			throw new RuntimeException(e);
+		}
+		System.out.println("Base directory found at " + file);
+		if (Files.isDirectory(file)) {
+			walkDir(file);
+		} else {
+			walkJar(file);
+		}
+		System.out.println("Found mixins: " + mixins);
+
+		return mixins;
+	}
+
+	/**
+	 * Search through directory for mixin classes based on {@link #getMixinBaseDir}.
+	 *
+	 * @param classRoot The root directory in which classes are stored for the default package.
+	 */
+	private void walkDir(Path classRoot) {
+		System.out.println("Trying to find mixins from directory");
+		try (Stream<Path> classes = Files.walk(classRoot.resolve(getMixinBaseDir()))) {
+			classes.map(it -> classRoot.relativize(it).toString())
+					.forEach(this::tryAddMixinClass);
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+	/**
+	 * Read through a JAR file, trying to find all mixins inside.
+	 */
+	private void walkJar(Path file) {
+		System.out.println("Trying to find mixins from jar file");
+		try (ZipInputStream zis = new ZipInputStream(Files.newInputStream(file))) {
+			ZipEntry next;
+			while ((next = zis.getNextEntry()) != null) {
+				tryAddMixinClass(next.getName());
+				zis.closeEntry();
+			}
+		} catch (IOException e) {
+			throw new RuntimeException(e);
+		}
+	}
+
+
+	@Override
+	public String getRefMapperConfig() {
+		return null;
+	}
+
+	@Override
+	public boolean shouldApplyMixin(String targetClassName, String mixinClassName) {
+		return true;
+	}
+
+	@Override
+	public void acceptTargets(Set<String> myTargets, Set<String> otherTargets) {
+
+	}
+
+	@Override
+	public void preApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+
+	}
+
+	@Override
+	public void postApply(String targetClassName, ClassNode targetClass, String mixinClassName, IMixinInfo mixinInfo) {
+
+	}
+}