Overgram/lib/src/main/java/io/github/lonamiwebs/overgram/Overgram.java

package io.github.lonamiwebs.overgram;

import io.github.lonamiwebs.overgram.crypto.AuthKey;
import io.github.lonamiwebs.overgram.network.MTProtoSender;
import io.github.lonamiwebs.overgram.network.MTProtoState;
import io.github.lonamiwebs.overgram.network.connection.TcpFull;
import io.github.lonamiwebs.overgram.tl.Functions;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;

public class Overgram {
    private static void saveAuthKey(final AuthKey authKey, final File file) {
        try (final FileOutputStream out = new FileOutputStream(file)) {
            out.write(authKey.key);
        } catch (IOException ignored) {
        }
    }

    private static AuthKey loadAuthKey(final File file) {
        try (final FileInputStream in = new FileInputStream(file)) {
            final byte[] key = new byte[256];
            assert in.read(key) == key.length;
            return new AuthKey(key);
        } catch (IOException ignored) {
            return null;
        }
    }

    public static void main(final String... args) throws IOException, InterruptedException, ExecutionException {
        final File authKey = new File("auth.key");
        final MTProtoSender sender = new MTProtoSender(new MTProtoState(loadAuthKey(authKey)), new TcpFull());
        try {
            sender.connect("149.154.167.91", 443);
            saveAuthKey(sender.state.authKey, authKey);
            final Future result = sender.send(new Functions.Ping());
            System.out.println(result.get());
        } finally {
            sender.disconnect();
        }
    }
}