Add Invis Footprints

src/main/java/me/metallicgoat/tweaksaddon/tweaks/cosmetic/InvisFootstepsParticles.java

@@ -0,0 +1,116 @@
+package me.metallicgoat.tweaksaddon.tweaks.cosmetic;
+
+import de.marcely.bedwars.api.GameAPI;
+import de.marcely.bedwars.api.arena.Arena;
+import de.marcely.bedwars.api.event.player.PlayerQuitArenaEvent;
+import de.marcely.bedwars.tools.NMSHelper;
+import me.metallicgoat.tweaksaddon.MBedwarsTweaksPlugin;
+import me.metallicgoat.tweaksaddon.config.MainConfig;
+import org.bukkit.Bukkit;
+import org.bukkit.Effect;
+import org.bukkit.Location;
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.bukkit.potion.PotionEffectType;
+import org.bukkit.scheduler.BukkitTask;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.IdentityHashMap;
+import java.util.Map;
+
+// ONLY FOR 1.8.8 -> 1.12.2
+public class InvisFootstepsParticles implements Listener {
+
+  private final Map<Player, Long> playerMoveTimes = new IdentityHashMap<>();
+  private BukkitTask task = null;
+
+  @EventHandler
+  public void onPlayerMove(PlayerMoveEvent event) {
+    if (!MainConfig.play_footsteps_with_invis || NMSHelper.get().getVersion() > 12)
+      return;
+
+    final Player player = event.getPlayer();
+    final Arena arena = GameAPI.get().getArenaByPlayer(player);
+
+    if (arena == null || arena.getSpectators().contains(player) || !player.hasPotionEffect(PotionEffectType.INVISIBILITY))
+      return;
+
+    this.playerMoveTimes.put(player, System.currentTimeMillis());
+
+    startTaskIfNeeded();
+  }
+
+  @EventHandler
+  public void onPlayerQuit(PlayerQuitArenaEvent event) {
+    if (!MainConfig.play_footsteps_with_invis || NMSHelper.get().getVersion() > 12)
+      return;
+
+    this.playerMoveTimes.remove(event.getPlayer());
+
+    stopTaskIfEmpty();
+  }
+
+  @SuppressWarnings("deprecation") // Player#playEffect()
+  private void startTaskIfNeeded() {
+    if (this.task != null)
+      return;
+
+    this.task = Bukkit.getScheduler().runTaskTimer(MBedwarsTweaksPlugin.getInstance(), () -> {
+      // Play particle if player moved within 2 seconds
+      this.playerMoveTimes.entrySet().removeIf(entry -> {
+        final Player player = entry.getKey();
+        final Arena arena = GameAPI.get().getArenaByPlayer(player);
+
+        if (!player.hasPotionEffect(PotionEffectType.INVISIBILITY) || arena == null || arena.getSpectators().contains(player))
+          return true;
+
+        if (System.currentTimeMillis() - entry.getValue() < 200) {
+          final Location loc = getSuitableParticleLocation(player);
+
+          if (loc != null)
+            player.playEffect(loc, Effect.FOOTSTEP, 1);
+
+        }
+
+        return false;
+      });
+
+      stopTaskIfEmpty();
+
+    }, 0, 7);
+  }
+
+  private void stopTaskIfEmpty() {
+    if (!this.playerMoveTimes.isEmpty())
+      return;
+
+    if (this.task != null) {
+      this.task.cancel();
+      this.task = null;
+    }
+  }
+
+  @Nullable
+  private Location getSuitableParticleLocation(Player player) {
+    final Location location = player.getLocation().clone();
+
+    int i = 0;
+    Material blockType = location.getBlock().getRelative(0, -1, 0).getType();
+
+    while (blockType == Material.AIR && i < 2) {
+      location.add(0, -1, 0);
+      blockType = location.getBlock().getRelative(0, -1, 0).getType();
+      i++;
+    }
+
+    if (blockType == Material.AIR)
+      return null;
+
+    location.setY(Math.floor(location.getY()) + 0.05);
+
+    return location;
+  }
+}