plugin/src/main/java/lol/pyr/znpcsplus/ZNpcsPlus.java

@@ -336,7 +336,8 @@ public class ZNpcsPlus {
                         .addSubcommand("setitem", new HoloSetItemCommand(npcRegistry))
                         .addSubcommand("offset", new HoloOffsetCommand(npcRegistry))
                         .addSubcommand("refreshdelay", new HoloRefreshDelayCommand(npcRegistry))
-                        .addSubcommand("removeduplicate", new HoloRemoveDuplicateCommand(npcRegistry)))
+                        .addSubcommand("removeduplicate", new HoloRemoveDuplicateCommand(npcRegistry))
+                        .addSubcommand("removeallduplicates", new holoRemoveAllDuplicatesCommand(npcRegistry)))
                 .addSubcommand("action", new MultiCommand(bootstrap.loadHelpMessage("action"))
                         .addSubcommand("add", new ActionAddCommand(npcRegistry, actionRegistry))
                         .addSubcommand("clear", new ActionClearCommand(npcRegistry))

plugin/src/main/java/lol/pyr/znpcsplus/commands/hologram/holoRemoveAllDuplicatesCommand.java

@@ -0,0 +1,62 @@
+package lol.pyr.znpcsplus.commands.hologram;
+
+import lol.pyr.director.adventure.command.CommandContext;
+import lol.pyr.director.adventure.command.CommandHandler;
+import lol.pyr.director.common.command.CommandExecutionException;
+import lol.pyr.znpcsplus.hologram.HologramImpl;
+import lol.pyr.znpcsplus.hologram.HologramLine;
+import lol.pyr.znpcsplus.hologram.HologramText;
+import lol.pyr.znpcsplus.npc.NpcEntryImpl;
+import lol.pyr.znpcsplus.npc.NpcRegistryImpl;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+public class holoRemoveAllDuplicatesCommand implements CommandHandler {
+    private final NpcRegistryImpl registry;
+
+    public holoRemoveAllDuplicatesCommand(NpcRegistryImpl registry) {
+        this.registry = registry;
+    }
+
+    @Override
+    public void run(CommandContext context) throws CommandExecutionException {
+        context.setUsage(context.getLabel() + " holo removeallduplicates <id>");
+
+        for (NpcEntryImpl npcEntry : registry.getAll()) {
+            HologramImpl hologram = npcEntry.getNpc().getHologram();
+            List<HologramLine<?>> lines = new ArrayList<>(hologram.getLines());
+            List<HologramText> textLines = new ArrayList<>();
+
+            Iterator<HologramLine<?>> iterator = lines.iterator();
+            while (iterator.hasNext()) {
+                HologramLine<?> line = iterator.next();
+                if (line instanceof HologramText textLine
+                        && !textLine.getValue().equals(Component.empty())
+                        && textLines.contains(textLine)) {
+                    iterator.remove();
+                    continue;
+                }
+
+                if (line instanceof HologramText textLine) {
+                    textLines.add(textLine);
+                }
+            }
+
+            hologram.clearLines();
+            hologram.addLines(lines);
+        }
+
+        context.send(Component.text("NPCs fixed!", NamedTextColor.GREEN));
+    }
+
+    @Override
+    public List<String> suggest(CommandContext context) throws CommandExecutionException {
+        if (context.argSize() == 1) return context.suggestCollection(registry.getModifiableIds());
+        return Collections.emptyList();
+    }
+}