Forge Update Checker

src/main/java/com/vandendaelen/handles/Handles.java

@@ -8,10 +8,12 @@
 import net.minecraftforge.fml.common.SidedProxy;
 import net.minecraftforge.fml.common.event.FMLInitializationEvent;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.PlayerEvent;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
-@Mod(modid = Reference.MODID,name = Reference.MOD_NAME,version = Reference.VERSION.VERSION,dependencies = Reference.DEP)
+@Mod(modid = Reference.MODID,name = Reference.MOD_NAME,version = Reference.VERSION.VERSION,dependencies = Reference.DEP, updateJSON = Reference.UPDATE_JSON)
 public class Handles {
     public static final Logger LOGGER = LogManager.getLogger(Reference.MOD_NAME);
 

src/main/java/com/vandendaelen/handles/event/CommonEvent.java

@@ -0,0 +1,33 @@
+package com.vandendaelen.handles.event;
+
+import com.vandendaelen.handles.utils.Reference;
+import net.minecraft.entity.player.EntityPlayer;
+import net.minecraft.util.text.TextComponentString;
+import net.minecraft.util.text.TextFormatting;
+import net.minecraft.util.text.event.ClickEvent;
+import net.minecraft.util.text.event.HoverEvent;
+import net.minecraftforge.common.ForgeVersion;
+import net.minecraftforge.fml.common.Loader;
+import net.minecraftforge.fml.common.Mod;
+import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.PlayerEvent;
+
+@Mod.EventBusSubscriber(modid = Reference.MODID)
+public class CommonEvent {
+    @SubscribeEvent
+    public void onPlayerLogin(PlayerEvent.PlayerLoggedInEvent e){
+        EntityPlayer player = e.player;
+        if (!player.world.isRemote){
+            ForgeVersion.CheckResult version = ForgeVersion.getResult(Loader.instance().activeModContainer());
+            if (version.status == ForgeVersion.Status.OUTDATED){
+                TextComponentString url = new TextComponentString(TextFormatting.DARK_AQUA + TextFormatting.BOLD.toString() + "UPDATE");
+                url.getStyle().setClickEvent(new ClickEvent(ClickEvent.Action.OPEN_URL, "https://minecraft.curseforge.com/projects/handles"));
+                url.getStyle().setHoverEvent(new HoverEvent(HoverEvent.Action.SHOW_TEXT, new TextComponentString("Open link")));
+
+                player.sendMessage(new TextComponentString(TextFormatting.DARK_RED + "[Handles] : ").appendSibling(url));
+                String changes = String.valueOf(version.changes).replace("{" + version.target + "=", "").replace("}", "");
+                player.sendMessage(new TextComponentString(TextFormatting.DARK_AQUA + "Changelog: " + TextFormatting.AQUA + changes));
+            }
+        }
+    }
+}

src/main/java/com/vandendaelen/handles/utils/Reference.java

@@ -6,6 +6,7 @@ public class Reference {
     public static final String DEP = "after:tardis, computercraft; required-after:forge@[14.23.4.2768,)";
     public static final String CLIENT_PROXY_CLASS = "com.vandendaelen.handles.proxy.ClientProxy";
     public static final String SERVER_PROXY_CLASS = "com.vandendaelen.handles.proxy.ServerProxy";
+    public static final String UPDATE_JSON = "https://raw.githubusercontent.com/LotuxPunk/Handles/master/update.json";
 
 
     public static class VERSION{

update.json

@@ -0,0 +1,11 @@
+{
+  "homepage": "https://minecraft.curseforge.com/projects/k9-mod",
+  "promos": {
+    "1.12.2-latest": "1.12.2-1.1.2.0",
+    "1.12.2-recommended": "1.12.2-1.1.2.0"
+  },
+  "1.12.2": {
+    "1.12.2-1.1.1.1": "First release, fix crash at launch",
+    "1.12.2-1.1.2.0": "New methods, Forge Update Checker"
+  }
+}