added update checks and separate internet library

src/main/java/com/falsepattern/lib/internal/FalsePatternLib.java

@@ -2,6 +2,8 @@ package com.falsepattern.lib.internal;
 
 import com.falsepattern.lib.config.ConfigException;
 import com.falsepattern.lib.config.ConfigurationManager;
+import com.falsepattern.lib.updates.ModUpdateInfo;
+import com.falsepattern.lib.updates.UpdateChecker;
 import com.falsepattern.lib.util.ResourceUtil;
 import com.google.common.eventbus.EventBus;
 import com.google.common.eventbus.Subscribe;
@@ -15,10 +17,15 @@ import cpw.mods.fml.common.event.FMLPostInitializationEvent;
 import cpw.mods.fml.common.event.FMLPreInitializationEvent;
 import lombok.Getter;
 import lombok.SneakyThrows;
+import lombok.val;
 import net.minecraft.launchwrapper.Launch;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+
 /**
  * Utility class used by FalsePatternLib's internal code. This can change between versions without notice, so do not use
  * this in your code!
@@ -30,6 +37,8 @@ public class FalsePatternLib extends DummyModContainer {
     @Getter private static final boolean developerEnvironment =
             (boolean) Launch.blackboard.get("fml.deobfuscatedEnvironment");
 
+    private Future<List<ModUpdateInfo>> updateCheckFuture;
+
     public FalsePatternLib() {
         super(MetadataCollection.from(ResourceUtil.getResourceFromJar("/mcmod.info", FalsePatternLib.class), Tags.MODID)
                                 .getMetadataForId(Tags.MODID, null));
@@ -48,8 +57,26 @@ public class FalsePatternLib extends DummyModContainer {
     }
 
     @Subscribe
-    public void postInit(FMLPostInitializationEvent e) {
+    public void preInit(FMLPreInitializationEvent e) {
+        if (LibraryConfig.ENABLE_UPDATE_CHECKER) {
+            getLog().info("Launching asynchronous update check. I'll check back on it during postInit.");
+            updateCheckFuture = UpdateChecker.fetchUpdatesAsync("https://falsepattern.com/mc/versions.json");
+        }
+    }
 
+    @Subscribe
+    public void postInit(FMLPostInitializationEvent e) {
+        if (updateCheckFuture != null && !updateCheckFuture.isCancelled()) {
+            try {
+                val updates = updateCheckFuture.get();
+                if (updates != null)
+                    for (val update: updates)
+                        update.log(getLog());
+            } catch (InterruptedException | ExecutionException ex) {
+                getLog().warn("Error while checking updates", ex);
+            }
+
+        }
     }
 
     @SuppressWarnings("UnstableApiUsage")