Add tentative configurable message

src/main/java/co/neeve/nonetherportals/NoNetherPortals.java

@@ -1,21 +1,113 @@
 package co.neeve.nonetherportals;
 
+import net.minecraft.command.CommandBase;
+import net.minecraft.command.ICommandSender;
+import net.minecraft.entity.player.EntityPlayerMP;
+import net.minecraft.server.MinecraftServer;
+import net.minecraft.util.math.AxisAlignedBB;
+import net.minecraft.util.text.TextComponentString;
+import net.minecraft.util.text.TextComponentTranslation;
 import net.minecraftforge.common.MinecraftForge;
-import net.minecraftforge.event.world.BlockEvent.PortalSpawnEvent;
+import net.minecraftforge.common.config.Configuration;
+import net.minecraftforge.common.config.Property;
+import net.minecraftforge.event.world.BlockEvent;
 import net.minecraftforge.fml.common.Mod;
 import net.minecraftforge.fml.common.Mod.EventHandler;
 import net.minecraftforge.fml.common.event.FMLPreInitializationEvent;
+import net.minecraftforge.fml.common.eventhandler.EventPriority;
 import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;
+import net.minecraftforge.fml.common.gameevent.PlayerEvent;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
 
 @Mod(modid = Tags.MODID, version = Tags.VERSION, name = Tags.MODNAME, acceptedMinecraftVersions = "[1.12.2]")
 public class NoNetherPortals {
+    private final Map<UUID, Long> lastMessageTimes = new HashMap<>();
+    private static final long MESSAGE_COOLDOWN = 60 * 20; // 60 seconds in ticks
+
+    private static Configuration config;
+    private static String portalMessage;
+
     @EventHandler
     public void preInit(FMLPreInitializationEvent event) {
+        File configFile = new File(event.getModConfigurationDirectory(), "nonetherportals.cfg");
+        config = new Configuration(configFile);
+
+        syncConfig();
+
         MinecraftForge.EVENT_BUS.register(this);
     }
 
-    @SubscribeEvent
-    public void onPortalSpawnEvent(PortalSpawnEvent event) {
+    @SubscribeEvent(priority = EventPriority.NORMAL)
+    public void onPortalSpawnEvent(BlockEvent.PortalSpawnEvent event) {
         event.setCanceled(true);
+
+        int range = 10;
+        List<EntityPlayerMP> players = event.getWorld().getEntitiesWithinAABB(EntityPlayerMP.class, new AxisAlignedBB(event.getPos()).grow(range));
+        long currentTime = event.getWorld().getTotalWorldTime();
+
+        for (EntityPlayerMP player : players) {
+            UUID playerId = player.getUniqueID();
+            if (lastMessageTimes.containsKey(playerId)) {
+                long lastMessageTime = lastMessageTimes.get(playerId);
+                if (currentTime - lastMessageTime < MESSAGE_COOLDOWN) {
+                    continue;
+                }
+            }
+
+            player.sendMessage(new TextComponentTranslation(portalMessage));
+
+            lastMessageTimes.put(playerId, currentTime);
+        }
+    }
+
+    @SubscribeEvent
+    public void onPlayerLoggedOut(PlayerEvent.PlayerLoggedOutEvent event) {
+        lastMessageTimes.remove(event.player.getUniqueID());
+    }
+
+    private void syncConfig() {
+        config.load();
+        Property propMessage = config.get(Configuration.CATEGORY_GENERAL, "portalMessage", "Portals are disabled.");
+        propMessage.setComment("The message to be displayed when portals are disabled.");
+        portalMessage = propMessage.getString();
+
+        if (config.hasChanged()) {
+            config.save();
+        }
+    }
+
+    @EventHandler
+    public void onServerStarting(net.minecraftforge.fml.common.event.FMLServerStartingEvent event) {
+        event.registerServerCommand(new CommandReloadConfig());
+    }
+
+    public class CommandReloadConfig extends CommandBase {
+        @Override
+        @NotNull
+        public String getName() {
+            return "nonetherportals";
+        }
+
+        @Override
+        @NotNull
+        public String getUsage(@NotNull ICommandSender sender) {
+            return "/nonetherportals reload";
+        }
+
+        @Override
+        public void execute(@NotNull MinecraftServer server, @NotNull ICommandSender sender, String[] args) {
+            if (args.length > 0 && args[0].equals("reload")) {
+                syncConfig();
+                sender.sendMessage(new TextComponentString("NoNetherPortals config reloaded."));
+            } else {
+                sender.sendMessage(new TextComponentString("Usage: /nonetherportals reload"));
+            }
+        }
     }
 }