fix nether portal

Author: Cong0707

uSkyBlock-Core/src/main/java/us/talabrek/ultimateskyblock/event/PlayerEvents.java

@@ -1,6 +1,7 @@
 package us.talabrek.ultimateskyblock.event;
 
 import com.destroystokyo.paper.event.player.PlayerTeleportEndGatewayEvent;
+import com.google.common.util.concurrent.RateLimiter;
 import com.google.inject.Inject;
 import com.google.inject.Singleton;
 import dk.lockfuglsang.minecraft.util.ItemStackUtil;
@@ -318,15 +319,20 @@ public void onTeleport(PlayerTeleportEvent event) {
         }
     }
 
+    private RateLimiter rateLimiter = RateLimiter.create(1);
+
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void onPlayerPortal(EntityPortalEnterEvent event) {
         if (event.getEntityType() == EntityType.PLAYER) {
             Player player = (Player) event.getEntity();
             PlayerInfo playerInfo = plugin.getPlayerInfo(player);
             boolean isFirstCompletion = playerInfo.checkChallenge("page1finished") == 0;
-            if (isFirstCompletion || player.isOp()){
+            if (player.isOp()) return;
+            if (isFirstCompletion){
                 event.setCancelled(true);
-                player.sendMessage("地狱门已被禁用");
+                if (rateLimiter.tryAcquire()) {
+                    player.sendMessage("\u00a7c地狱门已被禁用");
+                }
             }
         }
         else {

uSkyBlock-Core/src/main/java/us/talabrek/ultimateskyblock/util/ProgressTracker.java

@@ -29,6 +29,7 @@ public ProgressTracker(CommandSender sender, String format, double progressEvery
     public void progressUpdate(long progress, long total, Object... args) {
         Instant now = Instant.now();
         float pct = 100f * progress / (total > 0 ? total : 1f);
+        if (lastProgressTime == null) { lastProgressTime = now; }
         if (now.isAfter(lastProgressTime.plus(progressEvery)) || pct > (lastProgressPct + progressEveryPct)) {
             lastProgressPct = pct;
             lastProgressTime = now;