Command pagination

src/main/java/com/volmit/iris/util/decree/virtual/VirtualDecreeCommand.java

@@ -359,6 +359,18 @@ public class VirtualDecreeCommand {
             return true;
         }
 
+        else if(args.size() == 1)
+        {
+            for(String i : args)
+            {
+                if(i.startsWith("help="))
+                {
+                    sender.sendDecreeHelp(this, Integer.parseInt(i.split("\\Q=\\E")[1])-1);
+                    return true;
+                }
+            }
+        }
+
         String head = args.get(0);
         VirtualDecreeCommand match = matchNode(head, skip);
 

src/main/java/com/volmit/iris/util/plugin/VolmitSender.java

@@ -21,6 +21,7 @@ package com.volmit.iris.util.plugin;
 import com.volmit.iris.Iris;
 import com.volmit.iris.core.IrisSettings;
 import com.volmit.iris.util.collection.KList;
+import com.volmit.iris.util.collection.KMap;
 import com.volmit.iris.util.decree.DecreeParameter;
 import com.volmit.iris.util.decree.virtual.VirtualDecreeCommand;
 import com.volmit.iris.util.format.C;
@@ -41,12 +42,14 @@ import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionAttachment;
 import org.bukkit.permissions.PermissionAttachmentInfo;
 import org.bukkit.plugin.Plugin;
+import org.bukkit.util.ChatPaginator;
 
 import java.time.Duration;
 import java.util.Set;
 import java.util.UUID;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutionException;
+import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.atomic.AtomicReference;
 
@@ -408,25 +411,73 @@ public class VolmitSender implements CommandSender {
         sendHeader(name, 46);
     }
 
+
     public void sendDecreeHelp(VirtualDecreeCommand v) {
+        sendDecreeHelp(v, 0);
+    }
+
+
+    public static <T> KList<T> paginate(KList<T> all, int linesPerPage, int page, AtomicBoolean hasNext)
+    {
+        int totalPages = (int) Math.ceil((double)all.size() / linesPerPage);
+        page = page < 0 ? 0 : page >= totalPages ? totalPages - 1 : page;
+        hasNext.set(page < totalPages-1);
+        KList<T> d = new KList<>();
+
+        for(int i = linesPerPage * page; i < Math.min(all.size(), linesPerPage * (page + 1)); i++)
+        {
+            d.add(all.get(i));
+        }
+
+        return d;
+    }
+
+    public void sendDecreeHelp(VirtualDecreeCommand v, int page) {
         int m = v.getNodes().size();
 
+        sendMessageRaw("\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n");
+
         if (v.getNodes().isNotEmpty()) {
-            sendHeader(Form.capitalize(v.getName()) + " Help");
+            sendHeader(v.getPath() + (page > 0 ? (" {" + (page+1) + "}") : ""));
             if (isPlayer() && v.getParent() != null) {
                 sendMessageRaw("<hover:show_text:'" + "<#b54b38>Click to go back to <#3299bf>" + Form.capitalize(v.getParent().getName()) + " Help" + "'><click:run_command:" + v.getParent().getPath() + "><font:minecraft:uniform><#f58571>〈 Back</click></hover>");
             }
 
-            for (VirtualDecreeCommand i : v.getNodes()) {
+            AtomicBoolean next = new AtomicBoolean(false);
+            for (VirtualDecreeCommand i : paginate(v.getNodes(), 17, page, next)) {
                 sendDecreeHelpNode(i);
             }
+
+            String s = "";
+            int l = 75 - (page > 0 ? 10 : 0) - (next.get() ? 10 : 0);
+
+            if(page > 0)
+            {
+                s += "<hover:show_text:'<green>Click to go back to page " + page + "'><click:run_command:" + v.getPath() + " help=" + page + "><gradient:#27b84d:#2770b8>〈 Page " + page + "</click></hover><reset> ";
+            }
+
+            s += "<reset><font:minecraft:uniform><strikethrough><gradient:#32bfad:#34eb6b>" + Form.repeat(" ", l) + "<reset>";
+
+            if(next.get())
+            {
+                s += " <hover:show_text:'<green>Click to go to back to page " + (page+2) + "'><click:run_command:" + v.getPath() + " help=" + (page+2) + "><gradient:#2770b8:#27b84d>Page " + (page+2) + " ❭</click></hover>";
+            }
+
+            sendMessageRaw(s);
         } else {
             sendMessage(C.RED + "There are no subcommands in this group! Contact support, this is a command design issue!");
         }
     }
 
+    private static final KMap<String, String> helpCache = new KMap<>();
+
     public void sendDecreeHelpNode(VirtualDecreeCommand i) {
         if (isPlayer()) {
+            sendMessageRaw(helpCache.compute(i.getPath(), (k, v) -> {
+                if(v != null)
+                {
+                    return v;
+                }
 
                 String newline = "<reset>\n";
 
@@ -519,7 +570,8 @@ public class VolmitSender implements CommandSender {
                                 " " +
                                 nodes;
 
-            sendMessageRaw(wrapper);
+                return wrapper;
+            }));
         } else {
             sendMessage(i.getPath());
         }