Add main class and configuration

pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>eus.aichan</groupId>
+    <artifactId>BotBlocker</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.source>1.8</maven.compiler.source>
+        <maven.compiler.target>1.8</maven.compiler.target>
+    </properties>
+
+    <repositories>
+        <repository>
+            <id>spigot-repo</id>
+            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.17.1-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <defaultGoal>clean package</defaultGoal>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.2.0</version>
+                <configuration>
+                    <archive>
+                        <manifest>
+                            <addClasspath>true</addClasspath>
+                            <classpathPrefix>lib/</classpathPrefix>
+                            <mainClass>com.tuDominio.BotBlocker</mainClass>
+                        </manifest>
+                    </archive>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>

src/main/java/eus/aichan/Blocker/BotBlocker.java

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+package eus.aichan.Blocker;
+
+import org.bukkit.Bukkit;
+import org.bukkit.BanList.Type;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.UUID;
+
+public class BotBlocker extends JavaPlugin implements Listener {
+
+    private boolean pluginEnabled = true;
+    private int timeLimit;  // In seconds
+    private HashMap<UUID, Long> joinTimes = new HashMap<>();
+    private FileConfiguration playersCfg;
+
+    @Override
+    public void onEnable() {
+        saveDefaultConfig();
+        timeLimit = getConfig().getInt("time-limit", 60);  // Default to 60 seconds
+        Bukkit.getPluginManager().registerEvents(this, this);
+
+        File playersFile = new File(getDataFolder(), "players.yml");
+        if (!playersFile.exists()) {
+            saveResource("players.yml", false);
+        }
+        playersCfg = YamlConfiguration.loadConfiguration(playersFile);
+    }
+
+    @Override
+    public void onDisable() {
+        saveConfig();
+    }
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (command.getName().equalsIgnoreCase("botblocker")) {
+            if (args.length > 0) {
+                if (args[0].equalsIgnoreCase("enable")) {
+                    pluginEnabled = true;
+                    sender.sendMessage("BotBlocker enabled.");
+                } else if (args[0].equalsIgnoreCase("disable")) {
+                    pluginEnabled = false;
+                    sender.sendMessage("BotBlocker disabled.");
+                } else if (args[0].equalsIgnoreCase("setTimeLimit") && args.length > 1) {
+                    try {
+                        timeLimit = Integer.parseInt(args[1]);
+                        getConfig().set("time-limit", timeLimit);
+                        saveConfig();
+                        sender.sendMessage("Time limit set to " + timeLimit + " seconds.");
+                    } catch (NumberFormatException e) {
+                        sender.sendMessage("Invalid number format. Please enter a valid integer.");
+                    }
+                } else {
+                    return false;
+                }
+                return true;
+            }
+        }
+        return false;
+    }
+
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event) {
+        if (!pluginEnabled) return;
+
+        UUID playerId = event.getPlayer().getUniqueId();
+        if (!playersCfg.contains(playerId.toString())) {
+            joinTimes.put(playerId, System.currentTimeMillis());
+            playersCfg.set(playerId.toString(), true);
+            saveConfig();
+        }
+    }
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        if (!pluginEnabled) return;
+
+        UUID playerId = event.getPlayer().getUniqueId();
+        if (joinTimes.containsKey(playerId)) {
+            long joinTime = joinTimes.get(playerId);
+            long timeConnected = (System.currentTimeMillis() - joinTime) / 1000;
+            if (timeConnected < timeLimit) {
+                String playerName = event.getPlayer().getName();
+                Bukkit.getBanList(Type.NAME).addBan(playerName, "Bot detected. If you are a legitimate user, please contact the admin.", null, "Sistema anti-bot");
+                getLogger().info("Player '" + playerName + "' was banned for disconnecting within " + timeLimit + " seconds of joining for the first time - suspected bot.");
+            }
+            joinTimes.remove(playerId);
+        }
+    }
+}

src/main/resources/config.yml

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+# Time limit in seconds
+time-limit: 60

src/main/resources/plugin.yml

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+name: BotBlocker
+main: eus.aichan.BotBlocker
+version: 1.0
+description: A plugin to ban users who connect for the first time and disconnect within a certain time limit.
+commands:
+  botblocker:
+    description: Manages the BotBlocker plugin
+    usage: |
+      /<command> enable - Enables the BotBlocker plugin
+      /<command> disable - Disables the BotBlocker plugin
+      /<command> setTimeLimit [seconds] - Sets the time limit

target/classes/config.yml

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+# Time limit in seconds
+time-limit: 60

target/classes/plugin.yml

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+name: BotBlocker
+main: eus.aichan.BotBlocker
+version: 1.0
+description: A plugin to ban users who connect for the first time and disconnect within a certain time limit.
+commands:
+  botblocker:
+    description: Manages the BotBlocker plugin
+    usage: |
+      /<command> enable - Enables the BotBlocker plugin
+      /<command> disable - Disables the BotBlocker plugin
+      /<command> setTimeLimit [seconds] - Sets the time limit