added fabric mod

mod/src/main/java/com/xeovalyte/polarcraft/PolarcraftMod.java

@@ -0,0 +1,93 @@
+package com.xeovalyte.polarcraft;
+
+import net.fabricmc.api.ModInitializer;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import net.fabricmc.fabric.api.networking.v1.ServerPlayConnectionEvents;
+import net.minecraft.server.network.ServerPlayerEntity;
+import net.minecraft.text.Text;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+import java.util.UUID;
+import com.google.gson.stream.JsonReader;
+import java.io.StringReader;
+
+
+
+public class PolarcraftMod implements ModInitializer {
+    // This logger is used to write text to the console and the log file.
+    // It is considered best practice to use your mod id as the logger's name.
+    // That way, it's clear which mod wrote info, warnings, and errors.
+    public static final Logger LOGGER = LoggerFactory.getLogger("polarcraft-mod");
+
+    @Override
+    public void onInitialize() {
+        // This code runs as soon as Minecraft is in a mod-load-ready state.
+        // However, some things (like resources) may still be uninitialized.
+        // Proceed with mild caution.
+        ServerPlayConnectionEvents.JOIN.register((handler, sender, server) -> {
+            ServerPlayerEntity player = (ServerPlayerEntity) handler.player;
+            LOGGER.info("Player {} joined the game.", player.getUuidAsString());
+            onPlayerJoin(player);
+        });
+
+        LOGGER.info("Hello Fabric world!");
+    }
+
+    private void onPlayerJoin(ServerPlayerEntity player) {
+        UUID uuid = player.getUuid();
+
+        try {
+            // Create the POST request
+            URL url = new URL("http://localhost:3000/api/minecraft/verifyuuid");
+            HttpURLConnection con = (HttpURLConnection) url.openConnection();
+            con.setRequestMethod("POST");
+            con.setRequestProperty("Content-Type", "application/json");
+            con.setDoOutput(true);
+    
+            // Write the request body
+            String jsonInputString = "{\"uuid\":\"" + uuid + "\"}";
+            con.getOutputStream().write(jsonInputString.getBytes());
+    
+            // Read the response
+            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
+            StringBuilder responseBuilder = new StringBuilder();
+            String responseLine;
+            while ((responseLine = in.readLine()) != null) {
+                responseBuilder.append(responseLine);
+            }
+            String responseBody = responseBuilder.toString();
+    
+            // Parse the response as a JSON object
+            JsonReader jsonReader = new JsonReader(new StringReader(responseBody));
+            jsonReader.beginObject();
+            boolean verified = false;
+            int code = -1;
+            while (jsonReader.hasNext()) {
+                String key = jsonReader.nextName();
+                if (key.equals("verified")) {
+                    verified = jsonReader.nextBoolean();
+                } else if (key.equals("code")) {
+                    code = jsonReader.nextInt();
+                } else {
+                    jsonReader.skipValue();
+                }
+            }
+            jsonReader.endObject();
+    
+            // Kick the player if verified is true
+            if (!verified) {
+                player.networkHandler.disconnect(Text.literal("Whitelist yourself by using this code: " + code));
+            }
+        } catch (IOException e) {
+            player.networkHandler.disconnect(Text.literal("There was an error while verifing your account"));
+            e.printStackTrace();
+        }
+    }
+}

mod/src/main/java/com/xeovalyte/polarcraft/mixin/ExampleMixin.java

@@ -0,0 +1,15 @@
+package com.xeovalyte.polarcraft.mixin;
+
+import net.minecraft.server.MinecraftServer;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfo;
+
+@Mixin(MinecraftServer.class)
+public class ExampleMixin {
+	@Inject(at = @At("HEAD"), method = "loadWorld")
+	private void init(CallbackInfo info) {
+		// This code is injected into the start of MinecraftServer.loadWorld()V
+	}
+}

mod/src/main/resources/fabric.mod.json

@@ -0,0 +1,38 @@
+{
+	"schemaVersion": 1,
+	"id": "polarcraft-mod",
+	"version": "${version}",
+	"name": "Polarcraft Mod",
+	"description": "This is an example description! Tell everyone what your mod is about!",
+	"authors": [
+		"Me!"
+	],
+	"contact": {
+		"homepage": "https://fabricmc.net/",
+		"sources": "https://github.com/FabricMC/fabric-example-mod"
+	},
+	"license": "CC0-1.0",
+	"icon": "assets/polarcraft-mod/icon.png",
+	"environment": "*",
+	"entrypoints": {
+		"main": [
+			"com.xeovalyte.polarcraft.PolarcraftMod"
+		]
+	},
+	"mixins": [
+		"polarcraft-mod.mixins.json",
+		{
+			"config": "polarcraft-mod.client.mixins.json",
+			"environment": "client"
+		}
+	],
+	"depends": {
+		"fabricloader": ">=0.14.19",
+		"minecraft": "~1.19.4",
+		"java": ">=17",
+		"fabric-api": "*"
+	},
+	"suggests": {
+		"another-mod": "*"
+	}
+}

mod/src/main/resources/polarcraft-mod.mixins.json

@@ -0,0 +1,11 @@
+{
+	"required": true,
+	"package": "com.xeovalyte.polarcraft.mixin",
+	"compatibilityLevel": "JAVA_17",
+	"mixins": [
+		"ExampleMixin"
+	],
+	"injectors": {
+		"defaultRequire": 1
+	}
+}