Simplify game state and allow pausing

src/main/java/gent/zeus/mc13dtl/MC13DTL.java

@@ -8,8 +8,9 @@ import org.bukkit.plugin.java.JavaPlugin;
 import org.bukkit.scheduler.BukkitScheduler;
 
 import gent.zeus.mc13dtl.events.RandomEventRunner;
-import gent.zeus.mc13dtl.gamestate.GameStateCommand;
 import gent.zeus.mc13dtl.gamestate.GameStateHandler;
+import gent.zeus.mc13dtl.gamestate.StartGameCommand;
+import gent.zeus.mc13dtl.gamestate.TogglePauseCommand;
 import io.papermc.paper.command.brigadier.Commands;
 import io.papermc.paper.plugin.lifecycle.event.LifecycleEventManager;
 import io.papermc.paper.plugin.lifecycle.event.types.LifecycleEvents;
@@ -25,7 +26,8 @@ public class MC13DTL extends JavaPlugin {
         LifecycleEventManager<Plugin> manager = this.getLifecycleManager();
         manager.registerEventHandler(LifecycleEvents.COMMANDS, event -> {
             Commands commands = event.registrar();
-            commands.register("start-game", "Start a game of 13 days to live", new GameStateCommand());
+            commands.register("start-game", "Start a game of 13 days to live", new StartGameCommand());
+            commands.register("toggle-pause", "Toggle paused state", new TogglePauseCommand());
             commands.register("group-add", "Add player to team", new GroupAddCommand());
             commands.register("group-remove", "Remove player from team", new GroupRemoveCommand());
             commands.register("group-difficulty", "Set group difficulty", new GroupDifficultyCommand());

src/main/java/gent/zeus/mc13dtl/gamestate/GameStateHandler.java

@@ -5,12 +5,16 @@ import org.bukkit.NamespacedKey;
 import org.bukkit.World;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
+import org.bukkit.event.entity.EntityDamageEvent;
+import org.bukkit.event.entity.EntityPickupItemEvent;
 import org.bukkit.event.player.PlayerInteractEvent;
 import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.event.player.PlayerMoveEvent;
 import org.bukkit.event.world.WorldLoadEvent;
 import org.bukkit.persistence.PersistentDataType;
 
 import gent.zeus.mc13dtl.MC13DTL;
+import io.papermc.paper.event.entity.EntityMoveEvent;
 
 public class GameStateHandler implements Listener {
   @EventHandler
@@ -27,11 +31,45 @@ public class GameStateHandler implements Listener {
     GameStateUtil.loadWorld(world);
   }
 
-  @EventHandler
+  private boolean shouldCancel() {
-  public void onPlayerInteract(PlayerInteractEvent event) {
     NamespacedKey key = new NamespacedKey(MC13DTL.instance, "game-state");
     String gameState = Bukkit.getWorld("world").getPersistentDataContainer().get(key, PersistentDataType.STRING);
-    if (gameState.equals("lobby")) {
+    return gameState.equals("lobby") || gameState.equals("paused");
+  }
+
+  @EventHandler
+  public void onPlayerInteract(PlayerInteractEvent event) {
+    if (shouldCancel()) {
+      event.setCancelled(true);
+    }
+  }
+
+  @EventHandler
+  public void onEntityDamage(EntityDamageEvent event) {
+    if (shouldCancel()) {
+      event.setCancelled(true);
+    }
+  }
+
+  @EventHandler
+  public void onEntityPickupItem(EntityPickupItemEvent event) {
+    if (shouldCancel()) {
+      event.setCancelled(true);
+    }
+  }
+
+  @EventHandler
+  public void onEntityMove(EntityMoveEvent event) {
+    if (shouldCancel()) {
+      event.setCancelled(true);
+    }
+  }
+
+  @EventHandler
+  public void onPlayerMove(PlayerMoveEvent event) {
+    NamespacedKey key = new NamespacedKey(MC13DTL.instance, "game-state");
+    String gameState = Bukkit.getWorld("world").getPersistentDataContainer().get(key, PersistentDataType.STRING);
+    if (gameState.equals("paused") && event.getTo().getY() >= event.getFrom().getY()) {
       event.setCancelled(true);
     }
   }

src/main/java/gent/zeus/mc13dtl/gamestate/GameStateUtil.java

@@ -8,7 +8,6 @@ import org.bukkit.NamespacedKey;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
 import org.bukkit.persistence.PersistentDataType;
-import org.bukkit.potion.PotionEffect;
 
 import gent.zeus.mc13dtl.MC13DTL;
 import net.kyori.adventure.text.Component;
@@ -34,6 +33,11 @@ public class GameStateUtil {
       world.setGameRule(GameRule.DO_DAYLIGHT_CYCLE, true);
       world.getWorldBorder().setSize(10000);
     }
+    if (gameState.equals("paused")) {
+      world.setDifficulty(Difficulty.NORMAL);
+      world.setGameRule(GameRule.DO_DAYLIGHT_CYCLE, false);
+      world.getWorldBorder().setSize(10000);
+    }
   }
 
   static void loadPlayer(Player player) {
@@ -41,30 +45,15 @@ public class GameStateUtil {
     String gameState = Bukkit.getWorld("world").getPersistentDataContainer().get(key, PersistentDataType.STRING);
     if (gameState.equals("lobby")) {
       player.setGameMode(GameMode.ADVENTURE);
-      player.setInvulnerable(true);
       player.sendMessage(Component.text("Game hasn't started yet, please wait...").color(NamedTextColor.DARK_PURPLE));
     }
     if (gameState.equals("active")) {
-      NamespacedKey processedKey = new NamespacedKey(MC13DTL.instance, "player-processed");
-      if (!player.getPersistentDataContainer().getOrDefault(processedKey, PersistentDataType.BOOLEAN, false)) {
-        processPlayer(player);
-        return;
-      }
       player.setGameMode(GameMode.SURVIVAL);
-      player.setInvulnerable(false);
       player.sendMessage(Component.text("Game is active, have fun!").color(NamedTextColor.DARK_PURPLE));
     }
+    if (gameState.equals("paused")) {
+      player.setGameMode(GameMode.ADVENTURE);
+      player.sendMessage(Component.text("Game is currently paused").color(NamedTextColor.DARK_PURPLE));
     }
-
-  static void processPlayer(Player player) {
-    player.getInventory().clear();
-    player.heal(100);
-    player.getActivePotionEffects().clear();
-    for (PotionEffect effect : player.getActivePotionEffects()) {
-      player.removePotionEffect(effect.getType());
-    }
-    NamespacedKey key = new NamespacedKey(MC13DTL.instance, "player-processed");
-    player.getPersistentDataContainer().set(key, PersistentDataType.BOOLEAN, true);
-    loadPlayer(player);
   }
 }

src/main/java/gent/zeus/mc13dtl/gamestate/StartGameCommand.java

@@ -12,7 +12,7 @@ import io.papermc.paper.command.brigadier.CommandSourceStack;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 
-public class GameStateCommand implements BasicCommand {
+public class StartGameCommand implements BasicCommand {
   @Override
   public void execute(CommandSourceStack stack, String[] args) {
     World world = Bukkit.getWorld("world");
@@ -24,7 +24,7 @@ public class GameStateCommand implements BasicCommand {
     world.getPersistentDataContainer().set(key, PersistentDataType.STRING, "active");
     GameStateUtil.loadWorld(world);
     for (Player i : Bukkit.getOnlinePlayers()) {
-      GameStateUtil.processPlayer(i);
+      GameStateUtil.loadPlayer(i);
     }
   }
 

src/main/java/gent/zeus/mc13dtl/gamestate/TogglePauseCommand.java

@@ -0,0 +1,41 @@
+package gent.zeus.mc13dtl.gamestate;
+
+import org.bukkit.Bukkit;
+import org.bukkit.NamespacedKey;
+import org.bukkit.World;
+import org.bukkit.entity.Player;
+import org.bukkit.persistence.PersistentDataType;
+
+import gent.zeus.mc13dtl.MC13DTL;
+import io.papermc.paper.command.brigadier.BasicCommand;
+import io.papermc.paper.command.brigadier.CommandSourceStack;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+
+public class TogglePauseCommand implements BasicCommand {
+  @Override
+  public void execute(CommandSourceStack stack, String[] args) {
+    World world = Bukkit.getWorld("world");
+    NamespacedKey key = new NamespacedKey(MC13DTL.instance, "game-state");
+    if (world.getPersistentDataContainer().get(key, PersistentDataType.STRING).equals("active")) {
+      world.getPersistentDataContainer().set(key, PersistentDataType.STRING, "paused");
+      GameStateUtil.loadWorld(world);
+      for (Player i : Bukkit.getOnlinePlayers()) {
+        GameStateUtil.loadPlayer(i);
+      }
+    } else if (world.getPersistentDataContainer().get(key, PersistentDataType.STRING).equals("paused")) {
+      world.getPersistentDataContainer().set(key, PersistentDataType.STRING, "active");
+      GameStateUtil.loadWorld(world);
+      for (Player i : Bukkit.getOnlinePlayers()) {
+        GameStateUtil.loadPlayer(i);
+      }
+    } else {
+      stack.getSender().sendMessage(Component.text("Game is not started yet").color(NamedTextColor.RED));
+    }
+  }
+
+  @Override
+  public String permission() {
+    return "13dtl.manage-game";
+  }
+}