ActuallyAdditions/src/main/java/de/ellpeck/actuallyadditions/common/update/UpdateChecker.java

package de.ellpeck.actuallyadditions.common.update;

import de.ellpeck.actuallyadditions.common.ActuallyAdditions;
import de.ellpeck.actuallyadditions.common.config.values.ConfigBoolValues;
import de.ellpeck.actuallyadditions.common.util.StringUtil;
import de.ellpeck.actuallyadditions.common.util.Util;
import net.minecraft.client.Minecraft;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.util.text.ITextComponent;
import net.minecraftforge.common.MinecraftForge;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
import net.minecraftforge.fml.common.gameevent.TickEvent;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;

public class UpdateChecker {

    public static final String DOWNLOAD_LINK = "http://ellpeck.de/actadddownload";
    public static final String CHANGELOG_LINK = "http://ellpeck.de/actaddchangelog";
    public static boolean checkFailed;
    public static boolean needsUpdateNotify;
    public static int updateVersionInt;
    public static String updateVersionString;
    public static boolean threadFinished = false;

    public UpdateChecker() {
        if (ConfigBoolValues.DO_UPDATE_CHECK.isEnabled() && !Util.isDevVersion()) {
            ActuallyAdditions.LOGGER.info("Initializing Update Checker...");
            new ThreadUpdateChecker();
            MinecraftForge.EVENT_BUS.register(this);
        }
    }

    @SideOnly(Side.CLIENT)
    @SubscribeEvent(receiveCanceled = true)
    public void onTick(TickEvent.ClientTickEvent event) {
        if (Minecraft.getMinecraft().player != null) {
            EntityPlayer player = Minecraft.getMinecraft().player;
            if (UpdateChecker.checkFailed) {
                player.sendMessage(ITextComponent.Serializer.jsonToComponent(StringUtil.localize("info." + ActuallyAdditions.MODID + ".update.failed")));
            } else if (UpdateChecker.needsUpdateNotify) {
                player.sendMessage(ITextComponent.Serializer.jsonToComponent(StringUtil.localize("info." + ActuallyAdditions.MODID + ".update.generic")));
                player.sendMessage(ITextComponent.Serializer.jsonToComponent(StringUtil.localizeFormatted("info." + ActuallyAdditions.MODID + ".update.versionCompare", ActuallyAdditions.VERSION, UpdateChecker.updateVersionString)));
                player.sendMessage(ITextComponent.Serializer.jsonToComponent(StringUtil.localizeFormatted("info." + ActuallyAdditions.MODID + ".update.buttons", UpdateChecker.CHANGELOG_LINK, UpdateChecker.DOWNLOAD_LINK)));
            }
            if (threadFinished) MinecraftForge.EVENT_BUS.unregister(this);
        }
    }
}