Handle config defaults less poorly

Having it tied to TNT was a bad idea, since TNT is sometimes needed for
mining and stuff.

build.gradle

@@ -12,8 +12,10 @@ dependencies {
 	modCompile "net.fabricmc:fabric-loader:${project.loader_version}"
 	modCompile "net.fabricmc.fabric-api:fabric-api:${project.fabric_version}"
 	modCompile "org.json:json:20200518"
+	modCompile "org.xerial:sqlite-jdbc:3.32.3.2"
 	modImplementation "com.google.code.findbugs:jsr305:3.0.2"
 	include "org.json:json:20200518"
+	include "org.xerial:sqlite-jdbc:3.32.3.2"
 }
 
 jar {

src/main/java/party/_2a03/mc/mixin/MixinRespawnAnchorBlock.java

@@ -28,7 +28,7 @@ public abstract class MixinRespawnAnchorBlock extends Block {
 
 	@Inject(method = "explode", at = @At("HEAD"), cancellable = true)
 	private void onExplode(CallbackInfo ci) {
-		if (Config.getBool("disableTntExplosions") == true)
+		if (Config.getBool("disableRespawnAnchorExplosions") == true)
 			ci.cancel();
 	}
 }

src/main/java/party/_2a03/mc/server/Config.java

@@ -32,10 +32,13 @@ public class Config {
 			String jsonRaw = IOUtils.toString(is, "UTF-8");
 			json = new JSONObject(jsonRaw);
 		} else {
-			LOGGER.info("Config not found, creating one");
-			json = new JSONObject("{\"disableTntExplosions\":false,\"spawn\":[0,0,0,0,0,\"\"],\"members\":[]}");
-			saveConfig();
+			json = new JSONObject();
 		}
+
+		setDefault("disableTntExplosions", false);
+		setDefault("disableRespawnAnchorExplosions", false);
+		setDefault("spawn", (new PlayerPosition()).getJSON());
+	
 		LOGGER.info("Configuration loaded");
 	}
 
@@ -86,9 +89,19 @@ public class Config {
 		saveConfig();
 	}
 
+	public static void setDefault(String key, JSONArray data) {
+		if (!json.has(key))
+			json.put(key, data);
+	}
+
+	public static void setDefault(String key, Boolean data) {
+		if (!json.has(key))
+			json.put(key, data);
+	}
+
 	private static void saveConfig() {
 		try (FileWriter file = new FileWriter(config)) {
-			file.write(JSONObject.valueToString(json));
+			file.write(json.toString(2));
 		} catch (Exception e) {
 			LOGGER.error("Failed to save config file");
 		}