Merge pull request 'tab_cache' (#173) from tab_cache into master

Reviewed-on: #173
Reviewed-by: YoyoNow <jwsteam@nidido.de>

SpigotCore_Main/src/de/steamwar/sql/SchematicNode.java

@@ -22,6 +22,7 @@ package de.steamwar.sql;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
 import de.steamwar.core.Core;
 import de.steamwar.core.WorldEditWrapper;
+import org.bukkit.Bukkit;
 import org.bukkit.entity.Player;
 
 import java.io.ByteArrayInputStream;
@@ -375,6 +376,7 @@ public class SchematicNode {
         Provider.impl.updateSchematicNode(this);
         this.lastUpdate = Timestamp.from(Instant.now());
         this.brCache.clear();
+        TAB_CACHE.clear();
     }
 
     public void delete() {
@@ -437,12 +439,23 @@ public class SchematicNode {
         return node.getId() == id;
     }
 
+    protected static final Map<Integer, Map<String, List<String>>> TAB_CACHE = new HashMap<>();
+
+    static {
+        Bukkit.getScheduler().runTaskTimer(Core.getInstance(), TAB_CACHE::clear, 20L * 30, 20L * 30);
+    }
+
     public static List<String> getNodeTabcomplete(SteamwarUser user, String s) {
-        List<String> list = new ArrayList<>();
         boolean sws = s.startsWith("/");
         if (sws) {
             s = s.substring(1);
         }
+        int index = s.lastIndexOf("/");
+        String cacheKey = index == -1 ? "" : s.substring(0, index);
+        if(TAB_CACHE.containsKey(user.getId()) && TAB_CACHE.get(user.getId()).containsKey(cacheKey)) {
+            return new ArrayList<>(TAB_CACHE.get(user.getId()).get(cacheKey));
+        }
+        List<String> list = new ArrayList<>();
         if (s.contains("/")) {
             String preTab = s.substring(0, s.lastIndexOf("/") + 1);
             SchematicNode pa = SchematicNode.getNodeFromPath(user, preTab);
@@ -454,6 +467,7 @@ public class SchematicNode {
             nodes.forEach(node -> list.add((sws ? "/" : "") + node.getName() + (node.isDir() ? "/" : "")));
         }
         list.remove("//copy");
+        Objects.requireNonNull(TAB_CACHE.putIfAbsent(user.getId(), new HashMap<>())).putIfAbsent(cacheKey, list);
         return list;
     }