DynRes/src/main/java/io/gitlab/jfronny/dynres/mixin/ServerPropertiesHandlerMixin.java

package io.gitlab.jfronny.dynres.mixin;

import io.gitlab.jfronny.dynres.Cfg;
import io.gitlab.jfronny.dynres.DynRes;
import io.gitlab.jfronny.dynres.Logger;
import io.gitlab.jfronny.dynres.ServerPropertiesHandlerExt;
import io.gitlab.jfronny.libjf.Libjf;
import io.gitlab.jfronny.libweb.extra.LibWeb;
import io.gitlab.jfronny.libweb.extra.WebPaths;
import net.minecraft.server.dedicated.ServerPropertiesHandler;
import org.apache.commons.codec.digest.DigestUtils;
import org.spongepowered.asm.mixin.Final;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.Mutable;
import org.spongepowered.asm.mixin.Shadow;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;

import java.io.FileInputStream;
import java.io.IOException;

@Mixin(ServerPropertiesHandler.class)
public class ServerPropertiesHandlerMixin implements ServerPropertiesHandlerExt {
    @Mutable @Final @Shadow public String resourcePackHash;
    @Mutable @Final @Shadow public String resourcePackSha1;
    @Mutable @Final @Shadow public String resourcePack;

    @Inject(at = @At("RETURN"), method = "<init>(Ljava/util/Properties;)V")
    public void init(CallbackInfo info) {
        applyChanges(true);
    }

    @Override
    public void applyChanges(boolean print) {
        resourcePack = WebPaths.concat(LibWeb.api.getServerRoot(), "resources.zip");
        if (print)
            Logger.l.info("Pack link: " + resourcePack);
        resourcePackSha1 = "";
        Libjf.registerConfig("dynres", Cfg.class);
        if (Cfg.hashResources) {
            try {
                FileInputStream fs = new FileInputStream(DynRes.resFile);
                resourcePackSha1 = DigestUtils.sha1Hex(fs);
                if (print)
                    Logger.l.info("Set hash to " + resourcePackSha1);
                fs.close();
            } catch (IOException e) {
                Logger.l.error("Failed to get hash, continuing with empty", e);
            }
        }
        resourcePackHash = resourcePackSha1;
    }
}