Move player data from config to database

The plugin will not automatically migrate player data to the database.
I'll add the script I used for that, then bump the minor version number
like the coward I am.

src/main/java/party/_2a03/mc/command/HomeCommand.java

@@ -8,7 +8,7 @@ import net.minecraft.server.command.ServerCommandSource;
 import net.minecraft.server.network.ServerPlayerEntity;
 import net.minecraft.text.LiteralText;
 import net.minecraft.util.registry.RegistryKey;
-import party._2a03.mc.util.Config;
+import party._2a03.mc.util.Database;
 import party._2a03.mc.util.PlayerData;
 import party._2a03.mc.util.PlayerPosition;
 
@@ -17,7 +17,7 @@ public class HomeCommand {
 		LiteralArgumentBuilder<ServerCommandSource> literalargumentbuilder = CommandManager.literal("home").executes(ctx -> {
 			ServerCommandSource source = ctx.getSource();
 			ServerPlayerEntity sender = source.getPlayer();
-			PlayerPosition position = Config.getPlayer(sender.getUuid().toString()).getHome();
+			PlayerPosition position = Database.getPlayer(sender.getUuid().toString()).getHome();
 			if (position.registrykey == null) {
 				source.sendFeedback(new LiteralText("Home not found, do /home set"), false);
 				return -1;
@@ -30,7 +30,7 @@ public class HomeCommand {
 		literalargumentbuilder.then(CommandManager.literal("set").executes(ctx -> {
 			ServerCommandSource source = ctx.getSource();
 			ServerPlayerEntity sender = source.getPlayer();
-			PlayerData playerdata = Config.getPlayer(sender.getUuid().toString());
+			PlayerData playerdata = Database.getPlayer(sender.getUuid().toString());
 			double x = sender.getX();
 			double y = sender.getY();
 			double z = sender.getZ();
@@ -39,7 +39,6 @@ public class HomeCommand {
 			RegistryKey registrykey = sender.getServerWorld().getRegistryKey();
 			PlayerPosition location = new PlayerPosition(x, y, z, yaw, pitch, registrykey);
 			playerdata.setHome(location);
-			Config.setPlayer(playerdata);
 			source.sendFeedback(new LiteralText("Your home has been updated"), true);
 			return 1;
 		}));
@@ -49,7 +48,7 @@ public class HomeCommand {
 		}).then(CommandManager.argument("UUID", StringArgumentType.word()).executes(ctx -> {
 			ServerCommandSource source = ctx.getSource();
 			ServerPlayerEntity sender = source.getPlayer();
-			PlayerData playerdata = Config.getPlayer(StringArgumentType.getString(ctx, "UUID"));
+			PlayerData playerdata = Database.getPlayer(StringArgumentType.getString(ctx, "UUID"));
 			double x = sender.getX();
 			double y = sender.getY();
 			double z = sender.getZ();
@@ -58,7 +57,6 @@ public class HomeCommand {
 			RegistryKey registrykey = sender.getServerWorld().getRegistryKey();
 			PlayerPosition location = new PlayerPosition(x, y, z, yaw, pitch, registrykey);
 			playerdata.setHome(location);
-			Config.setPlayer(playerdata);
 			source.sendFeedback(new LiteralText("User's home has been updated (" + StringArgumentType.getString(ctx, "UUID") + ")"), true);
 			return 1;
 		})));

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

@@ -44,40 +44,6 @@ public class Config {
 		LOGGER.info("Configuration loaded");
 	}
 
-	public static PlayerData getPlayer(String uuid) {
-		JSONArray members = json.getJSONArray("members");
-		PlayerPosition home = null;
-		for (int i = 0; i < members.length(); ++i) {
-			JSONObject item = members.getJSONObject(i);
-			String item_uuid = item.getString("uuid");
-			if (item_uuid.equals(uuid)) {
-				home = new PlayerPosition(item.getJSONArray("home"));
-			}
-		}
-		if (home == null) {
-			home = new PlayerPosition();
-		}
-		return new PlayerData(uuid, home);
-	}
-
-	public static void setPlayer(PlayerData player) {
-		JSONArray members = json.getJSONArray("members");
-		int playerIndex = -1;
-		for (int i = 0; i < members.length(); ++i) {
-			JSONObject item = members.getJSONObject(i);
-			String item_uuid = item.getString("uuid");
-			if (item_uuid.equals(player.getUUID())) {
-				playerIndex = i;
-			}
-		}
-		if (playerIndex >= 0) {
-			members.remove(playerIndex);
-		}
-		members.put(player.getJSON());
-		json.put("members", members);
-		saveConfig();
-	}
-
 	public static JSONArray getData(String key) {
 		return json.getJSONArray(key);
 	}

src/main/java/party/_2a03/mc/util/Database.java

@@ -3,9 +3,15 @@ package party._2a03.mc.util;
 import java.io.File;
 import java.sql.Connection;
 import java.sql.DriverManager;
+import java.sql.Statement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
 import java.sql.SQLException;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.json.JSONArray;
+import party._2a03.mc.util.PlayerData;
+import party._2a03.mc.util.PlayerPosition;
 
 public class Database {
 	private static final Logger LOGGER = LogManager.getLogger();
@@ -21,6 +27,19 @@ public class Database {
 		String url = "jdbc:sqlite:";
 		url = url.concat(file.getPath());
 		conn = DriverManager.getConnection(url);
+		try {
+			Statement stmt;
+			stmt = conn.createStatement();
+			stmt.executeUpdate(
+				"CREATE TABLE IF NOT EXISTS players (" +
+				"uuid	TEXT	NOT NULL	UNIQUE," +
+				"home	TEXT," +
+				"PRIMARY KEY(uuid)" +
+				");");
+			stmt.close();
+		} catch (SQLException e) {
+			LOGGER.error(e.getMessage(), e);
+		}
 		LOGGER.info("Database loaded");
 	}
 
@@ -33,4 +52,40 @@ public class Database {
 			LOGGER.error(e.getMessage(), e);
 		}
 	}
+
+	public static PlayerData getPlayer(String uuid) {
+		try {
+			PreparedStatement pstmt;
+			pstmt = conn.prepareStatement(
+				"SELECT home FROM players WHERE uuid = ?;");
+			pstmt.setString(1, uuid);
+			ResultSet res = pstmt.executeQuery();
+			if (res.next()) {
+				PlayerPosition home = new PlayerPosition(new JSONArray(res.getString("home")));
+				return new PlayerData(uuid, home);
+			}
+			pstmt.close();
+		} catch (SQLException e) {
+			LOGGER.error(e.getMessage(), e);
+		}
+		return new PlayerData(uuid);
+	}
+
+	public static void setPlayerHome(String uuid, PlayerPosition home) {
+		try {
+			PreparedStatement pstmt;
+			pstmt = conn.prepareStatement(
+				"INSERT INTO players (uuid, home) " +
+				"VALUES(?, ?) " +
+				"ON CONFLICT(uuid) " +
+				"DO UPDATE SET home=?;");
+			pstmt.setString(1, uuid);
+			pstmt.setString(2, home.getJSON().toString());
+			pstmt.setString(3, home.getJSON().toString());
+			pstmt.executeUpdate();
+			pstmt.close();
+		} catch (SQLException e) {
+			LOGGER.error(e.getMessage(), e);
+		}
+	}
 }

src/main/java/party/_2a03/mc/util/PlayerData.java

@@ -2,12 +2,18 @@ package party._2a03.mc.util;
 
 import org.json.JSONArray;
 import org.json.JSONObject;
+import party._2a03.mc.util.Database;
 import party._2a03.mc.util.PlayerPosition;
 
 public class PlayerData {
 	private String uuid;
 	private PlayerPosition home;
 
+	public PlayerData(String p_uuid) {
+		this.uuid = p_uuid;
+		this.home = new PlayerPosition();
+	}
+
 	public PlayerData(String p_uuid, PlayerPosition p_home) {
 		this.uuid = p_uuid;
 		this.home = p_home;
@@ -23,6 +29,7 @@ public class PlayerData {
 
 	public void setHome(PlayerPosition location) {
 		this.home = location;
+		Database.setPlayerHome(this.uuid, this.home);
 	}
 
 	public JSONObject getJSON() {

src/main/java/party/_2a03/mc/util/PlayerPosition.java

@@ -4,7 +4,6 @@ import org.json.JSONArray;
 import net.minecraft.util.Identifier;
 import net.minecraft.util.registry.Registry;
 import net.minecraft.util.registry.RegistryKey;
-import party._2a03.mc.util.Config;
 
 public class PlayerPosition {
 	public double x;