fabric-loom/src/main/java/net/fabricmc/loom/task/DownloadTask.java

/*
 * This file is part of fabric-loom, licensed under the MIT License (MIT).
 *
 * Copyright (c) 2016 FabricMC
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package net.fabricmc.loom.task;

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import net.fabricmc.loom.LoomGradleExtension;
import net.fabricmc.loom.util.Checksum;
import net.fabricmc.loom.util.Constants;
import net.fabricmc.loom.util.ManifestVersion;
import net.fabricmc.loom.util.Version;
import net.fabricmc.loom.util.assets.AssetIndex;
import net.fabricmc.loom.util.assets.AssetObject;
import net.fabricmc.loom.util.progress.ProgressLogger;
import org.apache.commons.io.FileUtils;
import org.gradle.api.DefaultTask;
import org.gradle.api.artifacts.Configuration;
import org.gradle.api.artifacts.dsl.DependencyHandler;
import org.gradle.api.logging.Logger;
import org.gradle.api.tasks.TaskAction;

import java.io.*;
import java.net.URL;
import java.util.Map;
import java.util.Optional;
import java.util.zip.GZIPInputStream;

public class DownloadTask extends DefaultTask {
	@TaskAction
	public void download() {
		try {
			LoomGradleExtension extension = this.getProject().getExtensions().getByType(LoomGradleExtension.class);

			downloadMcJson(extension, getLogger());

			Gson gson = new Gson();
			Version version = gson.fromJson(new FileReader(Constants.MINECRAFT_JSON.get(extension)), Version.class);

			if (!Constants.MINECRAFT_CLIENT_JAR.get(extension).exists() || !Checksum.equals(Constants.MINECRAFT_CLIENT_JAR.get(extension), version.downloads.get("client").sha1)) {
				this.getLogger().lifecycle(":downloading client");
				FileUtils.copyURLToFile(new URL(version.downloads.get("client").url), Constants.MINECRAFT_CLIENT_JAR.get(extension));
			}

			if (!Constants.MINECRAFT_SERVER_JAR.get(extension).exists() || !Checksum.equals(Constants.MINECRAFT_SERVER_JAR.get(extension), version.downloads.get("server").sha1)) {
				this.getLogger().lifecycle(":downloading server");
				FileUtils.copyURLToFile(new URL(version.downloads.get("server").url), Constants.MINECRAFT_SERVER_JAR.get(extension));
			}

			if (!Constants.POMF_DIR.get(extension).exists()) {
				Constants.POMF_DIR.get(extension).mkdir();
			}

			if (!Constants.MAPPINGS_ZIP.get(extension).exists()) {
				this.getLogger().lifecycle(":downloading mappings");
				FileUtils.copyURLToFile(new URL("http://asie.pl:8080/job/pomf/" + extension.pomfVersion + "/artifact/build/libs/pomf-enigma-" + extension.version + "." + extension.pomfVersion + ".zip"), Constants.MAPPINGS_ZIP.get(extension));
			}

			if (!Constants.MAPPINGS_TINY.get(extension).exists()) {
				if (!Constants.MAPPINGS_TINY_GZ.get(extension).exists()) {
					getLogger().lifecycle(":downloading tiny mappings");
					FileUtils.copyURLToFile(new URL("http://asie.pl:8080/job/pomf/" + extension.pomfVersion + "/artifact/build/libs/pomf-tiny-" + extension.version + "." + extension.pomfVersion + ".gz"), Constants.MAPPINGS_TINY_GZ.get(extension));
				}
				GZIPInputStream gzipInputStream = new GZIPInputStream(new FileInputStream(Constants.MAPPINGS_TINY_GZ.get(extension)));
				FileOutputStream fileOutputStream = new FileOutputStream(Constants.MAPPINGS_TINY.get(extension));
				int length;
				byte[] buffer = new byte[1024];
				while ((length = gzipInputStream.read(buffer)) > 0) {
					fileOutputStream.write(buffer, 0, length);
				}
				gzipInputStream.close();
				fileOutputStream.close();
			}

			DependencyHandler dependencyHandler = getProject().getDependencies();

			if (getProject().getConfigurations().getByName(Constants.CONFIG_MC_DEPENDENCIES).getState() == Configuration.State.UNRESOLVED) {
				for (Version.Library library : version.libraries) {
					if (library.allowed() && library.getFile(extension) != null) {
						// By default, they are all available on all sides
						String configName = Constants.CONFIG_MC_DEPENDENCIES;
						if (library.name.contains("java3d") || library.name.contains("paulscode") || library.name.contains("lwjgl") || library.name.contains("twitch") || library.name.contains("jinput")) {
							configName = Constants.CONFIG_MC_DEPENDENCIES_CLIENT;
						}
						dependencyHandler.add(configName, library.getArtifactName());
					}
				}
			}

			if (getProject().getConfigurations().getByName(Constants.CONFIG_NATIVES).getState() == Configuration.State.UNRESOLVED) {
				version.libraries.stream().filter(lib -> lib.natives != null).forEach(lib -> dependencyHandler.add(Constants.CONFIG_NATIVES, lib.getArtifactName()));
			}

			// Force add LaunchWrapper
			dependencyHandler.add(Constants.CONFIG_MC_DEPENDENCIES, "net.minecraft:launchwrapper:1.11");

			Version.AssetIndex assetIndex = version.assetIndex;

			File assets = new File(extension.getFabricUserCache(), "assets-" + extension.version);
			if (!assets.exists()) {
				assets.mkdirs();
			}

			File assetsInfo = new File(assets, "indexes" + File.separator + assetIndex.id + ".json");
			if (!assetsInfo.exists() || !Checksum.equals(assetsInfo, assetIndex.sha1)) {
				this.getLogger().lifecycle(":downloading asset index");
				FileUtils.copyURLToFile(new URL(assetIndex.url), assetsInfo);
			}

			ProgressLogger progressLogger = ProgressLogger.getProgressFactory(getProject(), getClass().getName());
			progressLogger.start("Downloading assets...", "assets");
			AssetIndex index = new Gson().fromJson(new FileReader(assetsInfo), AssetIndex.class);
			Map<String, AssetObject> parent = index.getFileMap();
			final int totalSize = parent.size();
			int position = 0;
			this.getLogger().lifecycle(":downloading assets...");
			for (Map.Entry<String, AssetObject> entry : parent.entrySet()) {
				AssetObject object = entry.getValue();
				String sha1 = object.getHash();
				File file = new File(assets, "objects" + File.separator + sha1.substring(0, 2) + File.separator + sha1);
				if (!file.exists() || !Checksum.equals(file, sha1)) {
					this.getLogger().debug(":downloading asset " + entry.getKey());
					FileUtils.copyURLToFile(new URL(Constants.RESOURCES_BASE + sha1.substring(0, 2) + "/" + sha1), file);
				}
				String assetName = entry.getKey();
				int end = assetName.lastIndexOf("/") + 1;
				if (end > 0) {
					assetName = assetName.substring(end, assetName.length());
				}
				progressLogger.progress(assetName + " - " + position + "/" + totalSize + " (" + (int) ((position / (double) totalSize) * 100) + "%) assets downloaded");
				position++;
			}
			progressLogger.completed();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static void downloadMcJson(LoomGradleExtension extension, Logger logger) throws IOException {
		if (!Constants.MINECRAFT_JSON.get(extension).exists()) {
			logger.lifecycle(":downloading minecraft json");
			FileUtils.copyURLToFile(new URL("https://launchermeta.mojang.com/mc/game/version_manifest.json"), Constants.VERSION_MANIFEST.get(extension));
			ManifestVersion mcManifest = new GsonBuilder().create().fromJson(FileUtils.readFileToString(Constants.VERSION_MANIFEST.get(extension), "UTF-8"), ManifestVersion.class);

			Optional<ManifestVersion.Versions> optionalVersion = mcManifest.versions.stream().filter(versions -> versions.id.equalsIgnoreCase(extension.version)).findFirst();
			if (optionalVersion.isPresent()) {
				FileUtils.copyURLToFile(new URL(optionalVersion.get().url), Constants.MINECRAFT_JSON.get(extension));
			} else {
				logger.info(":failed downloading minecraft json");
				throw new RuntimeException("Failed downloading Minecraft json");
			}
		}
	}
}