FreshCoffee/src/main/java/com/thebrokenrail/freshcoffee/FreshCoffee.java

package com.thebrokenrail.freshcoffee;

import com.thebrokenrail.freshcoffee.config.HardcodedConfig;
import com.thebrokenrail.freshcoffee.dialog.Dialog;
import com.thebrokenrail.freshcoffee.download.AdoptOpenJDK;
import com.thebrokenrail.freshcoffee.util.PlatformUtil;
import com.thebrokenrail.freshcoffee.util.PreviewUtil;
import com.thebrokenrail.freshcoffee.util.ReLaunchUtil;
import com.thebrokenrail.freshcoffee.util.Util;
import com.thebrokenrail.freshcoffee.util.ExtractUtil;
import com.thebrokenrail.freshcoffee.util.limit.LimitUtil;
import net.fabricmc.loader.api.entrypoint.PreLaunchEntrypoint;

import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;

public class FreshCoffee implements PreLaunchEntrypoint {
    @Override
    public void onPreLaunch() {
        if (Util.JAVA_VERSION < LimitUtil.getMinimumJavaVersion().getValue() || Util.JAVA_VERSION > LimitUtil.getMaximumJavaVersion().getValue() || (PreviewUtil.arePreviewFeaturesRequired() && !PreviewUtil.arePreviewFeaturesEnabled())) {
            if (LimitUtil.getMinimumJavaVersion().getValue() > LimitUtil.getMaximumJavaVersion().getValue()) {
                Dialog.getInstance().showErrorDialog(String.format(HardcodedConfig.MINIMUM_HIGHER_THAN_MAXIMUM_MESSAGE, LimitUtil.getMinimumJavaVersion().toString(), LimitUtil.getMaximumJavaVersion().toString()));
                System.exit(1);
            }

            ReLaunchUtil.reLaunch(true);

            // Download Available JDKs
            AdoptOpenJDK.JDK jdk = AdoptOpenJDK.get().get(PlatformUtil.getPlatform());

            if (jdk != null) {
                int choice = Dialog.getInstance().showOptionDialog(String.format(HardcodedConfig.OUTDATED_JAVA_WITH_OFFER_MESSAGE, LimitUtil.getMinimumJavaVersion().toString(), Util.humanReadableByteCount(jdk.binary.packageObj.size, false)), HardcodedConfig.EXIT_BUTTON, HardcodedConfig.INSTALL_BUTTON);

                if (choice != 0) {
                    // Install
                    URL url = null;
                    try {
                        url = new URL(jdk.binary.packageObj.link);
                    } catch (MalformedURLException e) {
                        Util.getLogger().error("AdoptOpenJDK API Returned Invalid URL: " + jdk.binary.packageObj.link);
                    }

                    if (url != null) {
                        File dir = Util.getJavaDir(jdk.version.semver);

                        if (dir.exists()) {
                            Util.removeInvalidJDK(dir);
                        }

                        ExtractUtil.extract(url, dir);

                        ReLaunchUtil.reLaunch(false);
                    }

                    System.exit(1);
                } else {
                    // Exit
                    System.exit(0);
                }
            } else {
                Dialog.getInstance().showErrorDialog(String.format(HardcodedConfig.OUTDATED_JAVA_MESSAGE, LimitUtil.getMinimumJavaVersion().toString()));

                System.exit(0);
            }
        }
    }
}