clean up PlayerCommandPreprocess listener

Bukkit/src/main/java/com/plotsquared/bukkit/listener/PlayerEventListener.java

@@ -76,7 +76,6 @@ import com.plotsquared.core.util.EventDispatcher;
 import com.plotsquared.core.util.MathMan;
 import com.plotsquared.core.util.Permissions;
 import com.plotsquared.core.util.PremiumVerification;
-import com.plotsquared.core.util.RegExUtil;
 import com.plotsquared.core.util.entity.EntityCategories;
 import com.plotsquared.core.util.task.TaskManager;
 import com.plotsquared.core.util.task.TaskTime;
@@ -223,10 +222,9 @@ public class PlayerEventListener extends PlotListener implements Listener {
         }
     }
 
-    @SuppressWarnings("StringSplitter")
     @EventHandler(ignoreCancelled = true, priority = EventPriority.HIGHEST)
     public void playerCommand(PlayerCommandPreprocessEvent event) {
-        String msg = event.getMessage().toLowerCase().replaceAll("/", "").trim();
+        String msg = event.getMessage().replace("/", "").toLowerCase(Locale.ROOT).trim();
         if (msg.isEmpty()) {
             return;
         }
@@ -240,11 +238,9 @@ public class PlayerEventListener extends PlotListener implements Listener {
         String[] parts = msg.split(" ");
         Plot plot = plotPlayer.getCurrentPlot();
         // Check WorldEdit
-        switch (parts[0].toLowerCase()) {
+        switch (parts[0]) {
             case "up":
-            case "/up":
             case "worldedit:up":
-            case "worldedit:/up":
                 if (plot == null || (!plot.isAdded(plotPlayer.getUUID()) && !Permissions
                         .hasPermission(plotPlayer, Permission.PERMISSION_ADMIN_BUILD_OTHER, true))) {
                     event.setCancelled(true);
@@ -258,15 +254,40 @@ public class PlayerEventListener extends PlotListener implements Listener {
         List<String> blockedCommands = plot != null ?
                 plot.getFlag(BlockedCmdsFlag.class) :
                 area.getFlag(BlockedCmdsFlag.class);
-        if (!blockedCommands.isEmpty() && !Permissions
+        if (blockedCommands.isEmpty()) {
-                .hasPermission(plotPlayer, Permission.PERMISSION_ADMIN_INTERACT_BLOCKED_CMDS)) {
+            return;
-            String part = parts[0];
-            if (parts[0].contains(":")) {
-                part = parts[0].split(":")[1];
-                msg = msg.replace(parts[0].split(":")[0] + ':', "");
         }
+        if (Permissions.hasPermission(plotPlayer, Permission.PERMISSION_ADMIN_INTERACT_BLOCKED_CMDS)) {
+            return;
+        }
+        // When using namespaced commands, we're not interested in the namespace
+        String part = parts[0];
+        if (part.contains(":")) {
+            String[] namespaced = part.split(":");
+            part = namespaced[1];
+            msg = msg.substring(namespaced[0].length() + 1);
+        }
+        msg = replaceAliases(msg, part);
+        for (String blocked : blockedCommands) {
+            if (blocked.equalsIgnoreCase(msg)) {
+                String perm;
+                if (plot != null && plot.isAdded(plotPlayer.getUUID())) {
+                    perm = "plots.admin.command.blocked-cmds.shared";
+                } else {
+                    perm = "plots.admin.command.blocked-cmds.road";
+                }
+                if (!Permissions.hasPermission(plotPlayer, perm)) {
+                    plotPlayer.sendMessage(TranslatableCaption.of("blockedcmds.command_blocked"));
+                    event.setCancelled(true);
+                }
+                return;
+            }
+        }
+    }
+
+    private String replaceAliases(String msg, String part) {
         String s1 = part;
-            List<String> aliases = new ArrayList<>();
+        Set<String> aliases = new HashSet<>();
         for (HelpTopic cmdLabel : Bukkit.getServer().getHelpMap().getHelpTopics()) {
             if (part.equals(cmdLabel.getName())) {
                 break;
@@ -275,8 +296,8 @@ public class PlayerEventListener extends PlotListener implements Listener {
             if (aliases.contains(label)) {
                 continue;
             }
-                PluginCommand p;
+            PluginCommand p = Bukkit.getPluginCommand(label);
-                if ((p = Bukkit.getPluginCommand(label)) != null) {
+            if (p != null) {
                 for (String a : p.getAliases()) {
                     if (aliases.contains(a)) {
                         continue;
@@ -293,28 +314,7 @@ public class PlayerEventListener extends PlotListener implements Listener {
         if (!s1.equals(part)) {
             msg = msg.replace(s1, part);
         }
-            for (String s : blockedCommands) {
+        return msg;
-                Pattern pattern;
-                if (!RegExUtil.compiledPatterns.containsKey(s)) {
-                    RegExUtil.compiledPatterns.put(s, pattern = Pattern.compile(s));
-                } else {
-                    pattern = RegExUtil.compiledPatterns.get(s);
-                }
-                if (pattern.matcher(msg).matches()) {
-                    String perm;
-                    if (plot != null && plot.isAdded(plotPlayer.getUUID())) {
-                        perm = "plots.admin.command.blocked-cmds.shared";
-                    } else {
-                        perm = "plots.admin.command.blocked-cmds.road";
-                    }
-                    if (!Permissions.hasPermission(plotPlayer, perm)) {
-                        plotPlayer.sendMessage(TranslatableCaption.of("blockedcmds.command_blocked"));
-                        event.setCancelled(true);
-                    }
-                    return;
-                }
-            }
-        }
     }
 
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)

Core/src/main/java/com/plotsquared/core/util/RegExUtil.java

@@ -29,6 +29,7 @@ import java.util.HashMap;
 import java.util.Map;
 import java.util.regex.Pattern;
 
+@Deprecated(since = "TODO", forRemoval = true)
 public class RegExUtil {
 
     public static Map<String, Pattern> compiledPatterns;