commit 568e577173459c6dff8a3e7667efed72d12a6128
Author: marc barbier <mmarc471@gmail.com>
Date:   Wed Jan 13 22:49:31 2021 +0100

    initial version

diff --git a/downloader/CurseForgeModFile.java b/downloader/CurseForgeModFile.java
new file mode 100644
index 0000000..dd364c4
--- /dev/null
+++ b/downloader/CurseForgeModFile.java
@@ -0,0 +1,30 @@
+package downloader;
+
+public class CurseForgeModFile extends ProjectInfo{
+
+	private int projectID;
+	private int fileID;
+	private boolean clientOnly;
+	
+	public CurseForgeModFile(ProjectInfo pj,int projectID,int fileID,boolean clientOnly)
+	{
+		this(pj.getSlug(),pj.getName(),pj.getDesc(),projectID,fileID,clientOnly);
+	}
+	
+	public CurseForgeModFile(String slug, String name, String desc,int projectID,int fileID,boolean clientOnly) {
+		super(slug, name, desc);
+		this.projectID=projectID;
+		this.fileID=fileID;
+		this.clientOnly=clientOnly;
+	}
+	
+	public int getFileID() {
+		return fileID;
+	}
+	public int getProjectID() {
+		return projectID;
+	}
+	public boolean isClientOnly() {
+		return clientOnly;
+	}
+}
diff --git a/downloader/DBConnector.java b/downloader/DBConnector.java
new file mode 100644
index 0000000..1bb32d7
--- /dev/null
+++ b/downloader/DBConnector.java
@@ -0,0 +1,43 @@
+package downloader;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+public class DBConnector {
+	private Connection conn;
+
+	/**
+	 * Connect to a sample database
+	 * 
+	 * @throws SQLException
+	 */
+	public void connect(String dbFile) throws SQLException {
+		conn = null;
+		try {
+			// db parameters
+			String url = "jdbc:sqlite:" + dbFile;
+			System.out.println(url);
+			// create a connection to the database
+			conn = DriverManager.getConnection(url);
+			
+		} catch (SQLException e) {
+			System.out.println(e.getMessage());
+			throw e;
+		}
+	}
+
+	public void close() throws SQLException {
+		conn.close();
+	}
+
+	public ResultSet executeRequest(String sql) {
+		try {
+			return conn.createStatement().executeQuery(sql);
+		} catch (SQLException e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+}
\ No newline at end of file
diff --git a/downloader/Database.java b/downloader/Database.java
new file mode 100644
index 0000000..9f1ff8d
--- /dev/null
+++ b/downloader/Database.java
@@ -0,0 +1,184 @@
+package downloader;
+
+import java.io.BufferedInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.net.MalformedURLException;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+
+import org.apache.commons.compress.compressors.bzip2.BZip2CompressorInputStream;
+import org.apache.commons.compress.utils.IOUtils;
+
+import com.google.gson.Gson;
+
+import downloader.forgeSvc.ForgeSvcEntry;
+import downloader.forgeSvc.ForgeSvcFile;
+
+public class Database {
+
+	String version;
+	DBConnector connector;
+	Gson gson;
+
+	public Database() {
+
+		// Todo save ver
+		this.version = "";
+		gson = new Gson();
+		
+	}
+
+	public void updateDatabase() {
+		try {
+			String dbVersion = HttpHelper.readStringFromUrl("http://files.mcdex.net/data/latest.v5");
+			if (dbVersion.equals(version)) {
+				println("alredy up to date");
+				return;
+			}
+			if (dbVersion.equals("error")) {
+				println("an error ocured");
+				return;
+			}
+
+			println("newer version found");
+			if (!this.version.isEmpty()) {
+				println("current=" + this.version + " remote=" + dbVersion);
+			} else {
+				println("new=" + dbVersion);
+			}
+
+			println("fetching=" + "http://files.mcdex.net/data/mcdex-v5-" + dbVersion + ".dat.bz2");
+			File archive = HttpHelper.readFileFromUrl(null,"http://files.mcdex.net/data/mcdex-v5-" + dbVersion + ".dat.bz2");
+			println("download finished");
+			println("decompressing db");
+			File decompressedDatabase;
+			try {
+				decompressedDatabase = decompressBz2(archive, "database.dat");
+			} catch (IOException e) {
+				println("cannot extract database");
+				return;
+			}
+			println("done");
+			println("loading the database");
+			connector = new DBConnector();
+			try {
+				connector.connect(decompressedDatabase.getAbsolutePath());
+			} catch (SQLException e) {
+				return;
+			}
+			println("database loaded");
+			this.version = dbVersion;
+
+		} catch (MalformedURLException e) {
+			println("database link is dead");
+			System.exit(1);
+		}
+	}
+
+	private void print(String message) {
+		System.out.print("db : " + message);
+	}
+
+	private void println(String message) {
+		print(message + "\n");
+	}
+
+	private File decompressBz2(File inputFile, String outputFile) throws IOException {
+		BZip2CompressorInputStream input = new BZip2CompressorInputStream(
+				new BufferedInputStream(new FileInputStream(inputFile)));
+		File decompressedFile = new File(outputFile);
+		FileOutputStream output = new FileOutputStream(decompressedFile);
+		IOUtils.copy(input, output);
+		return decompressedFile;
+	}
+
+	private int findProjectBySlug(String slug, int ptype) {
+		int modID = -1;
+		ResultSet rs = connector.executeRequest("select projectid from projects where type =" + ptype + " and slug =\""
+				+ slug.trim().toLowerCase() + "\"");
+		try {
+			if (rs.next()) {
+				modID = rs.getInt("projectid");
+				System.out.println("modid:" + modID);
+			} else {
+				System.out.println("not found " + slug);
+				return -1;
+			}
+		} catch (SQLException e) {
+			e.printStackTrace();
+			return -1;
+		}
+		return modID;
+	}
+
+	private int findModBySlug(String slug) {
+		return findProjectBySlug(slug, 0);
+	}
+
+	private ProjectInfo getProjectInfo(int projectId) {
+		System.out.println(
+				"select slug, name, description from projects where projectid = " + projectId + " and type = 0");
+		ResultSet rs = connector.executeRequest(
+				"select slug, name, description from projects where projectid = " + projectId + " and type = 0");
+		try {
+			if (rs.next()) {
+				return new ProjectInfo(rs.getString("slug"), rs.getString("name"), rs.getString("description"));
+			}
+		} catch (SQLException e) {
+		}
+		return null;
+	}
+
+	public boolean fetchMod(String string) {
+		String name = string.split("/")[5];
+		int modID = findModBySlug(name);
+		if (modID == -1)
+			return false;
+		ProjectInfo pj = getProjectInfo(modID);
+		if (pj == null)
+			return false;
+		CurseForgeModFile modfile = new CurseForgeModFile(pj, modID, -1, false);
+		ForgeSvcFile file = getLastestFile("1.12.2", modfile);
+		if (file != null) {
+			try {
+				print("downloading  " + pj.getName());
+				HttpHelper.readFileFromUrlToFolder(pj.getSlug(),file.getDownloadUrl(modID), "mods");
+				println("download finished");
+				return true;
+			} catch (MalformedURLException e) {
+				e.printStackTrace();
+			}
+		} else {
+			System.out.println("no file in server");
+		}
+		return false;
+	}
+
+	public ForgeSvcFile getLastestFile(String minecraftVer, CurseForgeModFile mod) {
+		String projectUrl = "https://addons-ecs.forgesvc.net/api/v2/addon/" + mod.getProjectID();
+		String jsonProject;
+		try {
+			jsonProject = HttpHelper.readStringFromUrl(projectUrl);
+			if(jsonProject.equals("error"))return null;
+		} catch (MalformedURLException e) {
+			e.printStackTrace();
+			return null;
+		}
+	
+		ForgeSvcEntry entry = gson.fromJson(jsonProject, ForgeSvcEntry.class);
+
+		for (ForgeSvcFile f : entry.getFiles()) {
+				if (f.getGameVersion().equals(minecraftVer)) {
+					return f;
+			}
+		}
+		return null;
+	}
+	
+	
+	
+
+}
diff --git a/downloader/Downloader.java b/downloader/Downloader.java
new file mode 100644
index 0000000..522a025
--- /dev/null
+++ b/downloader/Downloader.java
@@ -0,0 +1,44 @@
+package downloader;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.IOException;
+import java.net.URISyntaxException;
+
+public class Downloader {
+	public static void main(String[] args) throws FileNotFoundException, IOException, URISyntaxException {
+		System.out.println("hello");
+		
+		Database db = new Database();
+		db.updateDatabase();
+
+		File f = new File("modpack.txt");
+		BufferedReader in = new BufferedReader(new FileReader(f));
+		while (in.ready()) {
+			String line = in.readLine();
+			if (!line.startsWith("//")) {
+				if (line.split("/").length >= 5 && ! line.startsWith("direct=")) {
+					if (!db.fetchMod(line)) {
+						System.err.println("error could not get " + line);
+					}
+				}else {
+					if(line.startsWith("direct@"))
+					{
+						char[] chars = new char[line.length()-line.indexOf("@")-"direct=".length()+1];
+						line.getChars("direct=".length(), line.indexOf("@"), chars, 0);
+						String slug = new String(chars);
+						
+						String[] url = line.replace("direct=*@", "").split("/");
+						System.out.println("downloading "+ url[url.length -1 ]);
+						HttpHelper.readFileFromUrlToFolder(slug,line.replace("direct@", ""),"mods");
+						System.out.println("done");
+					}
+				}
+			}
+		}
+		in.close();
+	}
+
+}
diff --git a/downloader/HttpHelper.java b/downloader/HttpHelper.java
new file mode 100644
index 0000000..46c524c
--- /dev/null
+++ b/downloader/HttpHelper.java
@@ -0,0 +1,162 @@
+package downloader;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.HttpURLConnection;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.zip.ZipFile;
+
+public class HttpHelper {
+
+	public static String[] fileList;
+
+	public static String readStringFromUrl(String urlToFetch) throws MalformedURLException {
+		URL url = new URL(urlToFetch);
+		HttpURLConnection con;
+		try {
+			con = (HttpURLConnection) url.openConnection();
+		} catch (IOException e1) {
+			e1.printStackTrace();
+			return "error";
+		}
+
+		String str = "";
+
+		try (InputStream in = con.getInputStream()) {
+			// par tranche de 4mo
+			for (;;) {
+				byte[] buffer = new byte[4096];
+				int nbBytesRead = in.read(buffer);
+				if (nbBytesRead < 0)
+					break;
+
+				for (int i = 0; i < nbBytesRead; i++) {
+					str += (char) buffer[i];
+				}
+			}
+
+		} catch (IOException e) {
+		}
+
+		return str;
+	}
+
+	public static File readFileFromUrl(String slug, String urlToFetch) throws MalformedURLException {
+		String[] url = urlToFetch.split("/");
+		if (url.length == 0)
+			throw new MalformedURLException();
+
+		return readFileFromUrl(slug, urlToFetch, url[url.length - 1]);
+	}
+
+	public static File readFileFromUrl(String slug, String urlToFetch, String filename) throws MalformedURLException {
+		return readFileFromUrl(slug, urlToFetch, new File(filename));
+	}
+
+	static File readFileFromUrlToFolder(String slug, String urlToFetch, String folder) throws MalformedURLException {
+		try {
+			Files.createDirectories(Paths.get(folder));
+		} catch (IOException e) {
+			System.out.println("could not create folder");
+			return null;
+		}
+
+		if (!folder.endsWith("/"))
+			folder += "/";
+
+		String[] url = urlToFetch.split("/");
+		if (url.length == 0)
+			throw new MalformedURLException();
+		String name = url[url.length - 1];
+
+		return readFileFromUrl(slug, urlToFetch, new File(folder + name));
+	}
+
+	private static File readFileFromUrl(String slug, String urlToFetch, File destination) throws MalformedURLException {
+		URL url = new URL(urlToFetch);
+		HttpURLConnection con;
+		try {
+			con = (HttpURLConnection) url.openConnection();
+		} catch (IOException e1) {
+			e1.printStackTrace();
+			return null;
+		}
+
+		File downloadingFile = destination;
+
+		if (slug != null)
+			checkAndDelete(downloadingFile, slug);
+
+		if (downloadingFile.exists()) {
+			return downloadingFile;
+		} else {
+			try {
+				downloadingFile.createNewFile();
+			} catch (IOException e) {
+				System.out.println("permission error could not write file");
+				System.exit(1);
+			}
+		}
+		FileOutputStream downloadingWriter;
+		try {
+			downloadingWriter = new FileOutputStream(downloadingFile);
+		} catch (FileNotFoundException e1) {
+			e1.printStackTrace();
+			return null;
+			// imposible vu qu'on l'a crée precedament
+		}
+
+		try (InputStream in = con.getInputStream()) {
+			int totalRead = 0;
+			// on lit par tranche de 4mo
+			byte[] buffer = new byte[4096];
+
+			while (true) {
+				int bytesRead = in.read(buffer);
+				if (bytesRead < 0)
+					break;
+				totalRead += bytesRead;
+				downloadingWriter.write(buffer, 0, bytesRead);
+				System.out.println("\r" + totalRead);
+			}
+			downloadingWriter.close();
+			return downloadingFile;
+		} catch (IOException e) {
+		}
+		return null;
+
+	}
+
+	// suprime les versions obselettes
+	private static void checkAndDelete(File fForgeSvcFile, String slug) {
+		if (fileList == null) {
+			fileList = new File("mods").list();
+		}
+
+		if (fForgeSvcFile.exists()) {
+			try {
+				//si sa balance une exception sa veut dire que le jar n'est pas lisible
+				new ZipFile(fForgeSvcFile).close();
+			} catch (IOException e) {
+				fForgeSvcFile.delete();
+				return;
+			}
+			
+			for (String s : fileList) {
+				if (s.contains(slug)) {
+					if (!fForgeSvcFile.getName().contains(s)) {
+						new File(s).delete();
+					}
+					return;
+				}
+			}
+
+		}
+	}
+}
diff --git a/downloader/ProjectInfo.java b/downloader/ProjectInfo.java
new file mode 100644
index 0000000..da8553f
--- /dev/null
+++ b/downloader/ProjectInfo.java
@@ -0,0 +1,24 @@
+package downloader;
+
+public class ProjectInfo {
+	private String slug, name, desc;
+
+	public ProjectInfo(String slug, String name, String desc) {
+		super();
+		this.slug = slug;
+		this.name = name;
+		this.desc = desc;
+	}
+	
+	public String getDesc() {
+		return desc;
+	}
+	public String getName() {
+		return name;
+	}
+	public String getSlug() {
+		return slug;
+	}
+	
+	
+}
diff --git a/downloader/forgeSvc/ForgeSvcEntry.java b/downloader/forgeSvc/ForgeSvcEntry.java
new file mode 100644
index 0000000..8a8d63b
--- /dev/null
+++ b/downloader/forgeSvc/ForgeSvcEntry.java
@@ -0,0 +1,9 @@
+package downloader.forgeSvc;
+
+public class ForgeSvcEntry {
+	private ForgeSvcFile[] gameVersionLatestFiles;
+	
+	public ForgeSvcFile[] getFiles() {
+		return gameVersionLatestFiles;
+	}
+}
diff --git a/downloader/forgeSvc/ForgeSvcFile.java b/downloader/forgeSvc/ForgeSvcFile.java
new file mode 100644
index 0000000..8985a54
--- /dev/null
+++ b/downloader/forgeSvc/ForgeSvcFile.java
@@ -0,0 +1,37 @@
+package downloader.forgeSvc;
+
+import java.net.MalformedURLException;
+
+import downloader.HttpHelper;
+
+public class ForgeSvcFile {
+	private String gameVersion;
+	private int fileType;
+	private int projectFileId;
+	private String projectFileName;
+	
+	public String getGameVersion() {
+		return gameVersion;
+	}
+	
+	public int getFileType() {
+		return fileType;
+	}
+	public int getProjectFileId() {
+		return projectFileId;
+	}
+	
+	public String getProjectFileName() {
+		return projectFileName;
+	}
+
+	public String getDownloadUrl(int modID) throws MalformedURLException {
+		System.out.println("https://addons-ecs.forgesvc.net/api/v2/addon/"+modID+"/file/"+getProjectFileId());
+		return HttpHelper.readStringFromUrl("https://addons-ecs.forgesvc.net/api/v2/addon/"+modID+"/file/"+projectFileId+"/download-url");
+	}
+	
+	public String getMD5(int modID)
+	{
+		return "https://addons-ecs.forgesvc.net/api/v2/addon/"+modID+"/file/"+getProjectFileId();
+	}
+}