add config system and window dragging

src/main/java/me/kawaiizenbo/moonlight/Config.java

@@ -0,0 +1,107 @@
+package me.kawaiizenbo.moonlight;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.nio.file.Files;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.google.gson.Gson;
+
+import me.kawaiizenbo.moonlight.module.Category;
+import me.kawaiizenbo.moonlight.module.ModuleManager;
+import me.kawaiizenbo.moonlight.module.Module_;
+import me.kawaiizenbo.moonlight.module.settings.Setting;
+import me.kawaiizenbo.moonlight.ui.clickgui.ClickGUIScreen;
+import net.minecraft.client.MinecraftClient;
+
+public class Config 
+{
+    MinecraftClient mc = MinecraftClient.getInstance();
+    public File configDir = new File(mc.runDirectory.getPath() + "/moonlight");
+    public File configFile = new File(configDir, "config.json");
+    public Map<String, Object> config = new HashMap<>();
+    protected static Gson gson = new Gson();
+    
+    public Config()
+    {
+        configDir.mkdirs();
+    }
+
+    public boolean doesConfigExist()
+    {
+        return !Files.exists(configFile.toPath());
+    }
+
+    public void loadDefaultConfig()
+    {
+        ModuleManager.INSTANCE = new ModuleManager();
+        Map<String, Object> mi = new HashMap<>();
+        for (Module_ m : ModuleManager.INSTANCE.modules)
+		{
+			Map<String, Object> mo = new HashMap<>();
+            mo.put("enabled", m.enabled);
+			for (Setting s : m.settings)
+			{
+                mo.put(s.name, s.value);
+			}
+            mi.put(m.name, mo);
+		}
+        config.put("modules", mi);
+        int xOffset = 4;
+		int yOffset = 4;
+        Map<String, Object> pi = new HashMap<>();
+        for (Category category : Category.values())
+		{ 
+            Map<String, Object> po = new HashMap<>();
+			if (xOffset > 400)
+			{
+				xOffset = 4;
+				yOffset = 128;
+			}
+			po.put("x", xOffset);
+            po.put("y", yOffset);
+            po.put("collapsed", false);
+            pi.put(category.name, po);
+			xOffset += 100;
+		}
+        config.put("panes", pi);
+        ClickGUIScreen.INSTANCE = new ClickGUIScreen();
+    }
+
+    public void load()
+    {
+        try
+        {
+            String configText = new String(Files.readAllBytes(configFile.toPath()));
+            config = (Map<String, Object>)gson.fromJson(configText, Map.class);
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+        }
+    }
+
+    public void save()
+    {
+        try
+        { 
+            if (!doesConfigExist()) configFile.createNewFile(); 
+        } 
+        catch(Exception e) 
+        {
+            e.printStackTrace();
+        }
+        try
+        {
+            String configText = gson.toJson(config);
+            FileWriter writer = new FileWriter(configFile);
+            writer.write(configText);
+            writer.close();
+        }
+        catch (Exception e)
+        {
+            e.printStackTrace();
+        }
+    }
+}