Implement ram and rambar commands

patches/server/0255-Implement-ram-and-rambar-commands.patch

@@ -1,360 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: BillyGalbreath <blake.galbreath@gmail.com>
-Date: Mon, 26 Sep 2022 07:43:30 -0500
-Subject: [PATCH] Implement ram and rambar commands
-
-
-diff --git a/net/minecraft/commands/Commands.java b/net/minecraft/commands/Commands.java
-index 5873f74df67d59f25682286a5b027963d8a6d382..93c07a4c96e25ed1db5e1f721ab5d53192a0225f 100644
---- a/net/minecraft/commands/Commands.java
-+++ b/net/minecraft/commands/Commands.java
-@@ -261,6 +261,8 @@ public class Commands {
-             org.purpurmc.purpur.command.UptimeCommand.register(this.dispatcher); // Purpur
-             org.purpurmc.purpur.command.TPSBarCommand.register(this.dispatcher); // Purpur
-             org.purpurmc.purpur.command.CompassCommand.register(this.dispatcher); // Purpur
-+            org.purpurmc.purpur.command.RamBarCommand.register(this.dispatcher); // Purpur - Implement ram and rambar commands
-+            org.purpurmc.purpur.command.RamCommand.register(this.dispatcher); // Purpur - Implement ram and rambar commands
-         }
- 
-         if (environment.includeIntegrated) {
-diff --git a/net/minecraft/server/level/ServerPlayer.java b/net/minecraft/server/level/ServerPlayer.java
-index d97db4d05d7940d8408e7e0d473a3b17d956b858..6f39fd99ffb28d6c0267f4251c54af0c519289db 100644
---- a/net/minecraft/server/level/ServerPlayer.java
-+++ b/net/minecraft/server/level/ServerPlayer.java
-@@ -330,6 +330,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player imple
-     public boolean purpurClient = false; // Purpur - Purpur client support
-     private boolean tpsBar = false; // Purpur
-     private boolean compassBar = false; // Purpur
-+    private boolean ramBar = false; // Purpur - Implement ram and rambar commands
- 
-     // Paper start - rewrite chunk system
-     private ca.spottedleaf.moonrise.patches.chunk_system.player.RegionizedPlayerChunkLoader.PlayerChunkLoaderData chunkLoader;
-@@ -694,6 +695,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player imple
- 
-         if (nbt.contains("Purpur.TPSBar")) { this.tpsBar = nbt.getBoolean("Purpur.TPSBar"); } // Purpur
-         if (nbt.contains("Purpur.CompassBar")) { this.compassBar = nbt.getBoolean("Purpur.CompassBar"); } // Purpur
-+        if (nbt.contains("Purpur.RamBar")) { this.ramBar = nbt.getBoolean("Purpur.RamBar"); } // Purpur - Implement ram and rambar commands
-     }
- 
-     @Override
-@@ -746,6 +748,7 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player imple
-         }
- 
-         this.saveEnderPearls(nbt);
-+        nbt.putBoolean("Purpur.RamBar", this.ramBar); // Purpur - Implement ram and rambar commands
-         nbt.putBoolean("Purpur.TPSBar", this.tpsBar); // Purpur
-         nbt.putBoolean("Purpur.CompassBar", this.compassBar); // Purpur
-     }
-@@ -3457,5 +3460,13 @@ public class ServerPlayer extends net.minecraft.world.entity.player.Player imple
-     public void compassBar(boolean compassBar) {
-         this.compassBar = compassBar;
-     }
-+
-+    public boolean ramBar() {
-+        return this.ramBar;
-+    }
-+
-+    public void ramBar(boolean ramBar) {
-+        this.ramBar = ramBar;
-+    }
-     // Purpur end
- }
-diff --git a/src/main/java/org/purpurmc/purpur/PurpurConfig.java b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
-index 4218aa563ba435a67c8e7af1fa9dc0c0d8d6b377..dca02d697dd0982b006d4d975e7df745ab62dac5 100644
---- a/src/main/java/org/purpurmc/purpur/PurpurConfig.java
-+++ b/src/main/java/org/purpurmc/purpur/PurpurConfig.java
-@@ -185,6 +185,8 @@ public class PurpurConfig {
-     public static String creditsCommandOutput = "<green>%s has been shown the end credits";
-     public static String demoCommandOutput = "<green>%s has been shown the demo screen";
-     public static String pingCommandOutput = "<green>%s's ping is %sms";
-+    public static String ramCommandOutput = "<green>Ram Usage: <used>/<xmx> (<percent>)";
-+    public static String rambarCommandOutput = "<green>Rambar toggled <onoff> for <target>";
-     public static String tpsbarCommandOutput = "<green>Tpsbar toggled <onoff> for <target>";
-     public static String dontRunWithScissors = "<red><italic>Don't run with scissors!";
-     public static String uptimeCommandOutput = "<green>Server uptime is <uptime>";
-@@ -202,6 +204,8 @@ public class PurpurConfig {
-         creditsCommandOutput = getString("settings.messages.credits-command-output", creditsCommandOutput);
-         demoCommandOutput = getString("settings.messages.demo-command-output", demoCommandOutput);
-         pingCommandOutput = getString("settings.messages.ping-command-output", pingCommandOutput);
-+        ramCommandOutput = getString("settings.messages.ram-command-output", ramCommandOutput);
-+        rambarCommandOutput = getString("settings.messages.rambar-command-output", rambarCommandOutput);
-         tpsbarCommandOutput = getString("settings.messages.tpsbar-command-output", tpsbarCommandOutput);
-         dontRunWithScissors = getString("settings.messages.dont-run-with-scissors", dontRunWithScissors);
-         uptimeCommandOutput = getString("settings.messages.uptime-command-output", uptimeCommandOutput);
-@@ -250,6 +254,15 @@ public class PurpurConfig {
-         disableGiveCommandDrops = getBoolean("settings.disable-give-dropping", disableGiveCommandDrops);
-     }
- 
-+    public static String commandRamBarTitle = "<gray>Ram<yellow>:</yellow> <used>/<xmx> (<percent>)";
-+    public static BossBar.Overlay commandRamBarProgressOverlay = BossBar.Overlay.NOTCHED_20;
-+    public static BossBar.Color commandRamBarProgressColorGood = BossBar.Color.GREEN;
-+    public static BossBar.Color commandRamBarProgressColorMedium = BossBar.Color.YELLOW;
-+    public static BossBar.Color commandRamBarProgressColorLow = BossBar.Color.RED;
-+    public static String commandRamBarTextColorGood = "<gradient:#55ff55:#00aa00><text></gradient>";
-+    public static String commandRamBarTextColorMedium = "<gradient:#ffff55:#ffaa00><text></gradient>";
-+    public static String commandRamBarTextColorLow = "<gradient:#ff5555:#aa0000><text></gradient>";
-+    public static int commandRamBarTickInterval = 20;
-     public static String commandTPSBarTitle = "<gray>TPS<yellow>:</yellow> <tps> MSPT<yellow>:</yellow> <mspt> Ping<yellow>:</yellow> <ping>ms";
-     public static BossBar.Overlay commandTPSBarProgressOverlay = BossBar.Overlay.NOTCHED_20;
-     public static TPSBarTask.FillMode commandTPSBarProgressFillMode = TPSBarTask.FillMode.MSPT;
-@@ -277,6 +290,16 @@ public class PurpurConfig {
-     public static String uptimeSecond = "%02d second";
-     public static String uptimeSeconds = "%02d seconds";
-     private static void commandSettings() {
-+        commandRamBarTitle = getString("settings.command.rambar.title", commandRamBarTitle);
-+        commandRamBarProgressOverlay = BossBar.Overlay.valueOf(getString("settings.command.rambar.overlay", commandRamBarProgressOverlay.name()));
-+        commandRamBarProgressColorGood = BossBar.Color.valueOf(getString("settings.command.rambar.progress-color.good", commandRamBarProgressColorGood.name()));
-+        commandRamBarProgressColorMedium = BossBar.Color.valueOf(getString("settings.command.rambar.progress-color.medium", commandRamBarProgressColorMedium.name()));
-+        commandRamBarProgressColorLow = BossBar.Color.valueOf(getString("settings.command.rambar.progress-color.low", commandRamBarProgressColorLow.name()));
-+        commandRamBarTextColorGood = getString("settings.command.rambar.text-color.good", commandRamBarTextColorGood);
-+        commandRamBarTextColorMedium = getString("settings.command.rambar.text-color.medium", commandRamBarTextColorMedium);
-+        commandRamBarTextColorLow = getString("settings.command.rambar.text-color.low", commandRamBarTextColorLow);
-+        commandRamBarTickInterval = getInt("settings.command.rambar.tick-interval", commandRamBarTickInterval);
-+
-         commandTPSBarTitle = getString("settings.command.tpsbar.title", commandTPSBarTitle);
-         commandTPSBarProgressOverlay = BossBar.Overlay.valueOf(getString("settings.command.tpsbar.overlay", commandTPSBarProgressOverlay.name()));
-         commandTPSBarProgressFillMode = TPSBarTask.FillMode.valueOf(getString("settings.command.tpsbar.fill-mode", commandTPSBarProgressFillMode.name()));
-diff --git a/src/main/java/org/purpurmc/purpur/command/RamBarCommand.java b/src/main/java/org/purpurmc/purpur/command/RamBarCommand.java
-new file mode 100644
-index 0000000000000000000000000000000000000000..2852c07adb080c34905f5d1b19efed8ea47eecc6
---- /dev/null
-+++ b/src/main/java/org/purpurmc/purpur/command/RamBarCommand.java
-@@ -0,0 +1,44 @@
-+package org.purpurmc.purpur.command;
-+
-+import com.mojang.brigadier.CommandDispatcher;
-+import net.kyori.adventure.text.Component;
-+import net.kyori.adventure.text.format.NamedTextColor;
-+import net.kyori.adventure.text.minimessage.MiniMessage;
-+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
-+import net.minecraft.commands.CommandSourceStack;
-+import net.minecraft.commands.Commands;
-+import net.minecraft.commands.arguments.EntityArgument;
-+import net.minecraft.server.level.ServerPlayer;
-+import org.purpurmc.purpur.PurpurConfig;
-+import org.purpurmc.purpur.task.RamBarTask;
-+
-+import java.util.Collection;
-+import java.util.Collections;
-+
-+public class RamBarCommand {
-+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
-+        dispatcher.register(Commands.literal("rambar")
-+                .requires(listener -> listener.hasPermission(2, "bukkit.command.rambar"))
-+                .executes(context -> execute(context.getSource(), Collections.singleton(context.getSource().getPlayerOrException())))
-+                .then(Commands.argument("targets", EntityArgument.players())
-+                        .requires(listener -> listener.hasPermission(2, "bukkit.command.rambar.other"))
-+                        .executes((context) -> execute(context.getSource(), EntityArgument.getPlayers(context, "targets")))
-+                )
-+        );
-+    }
-+
-+    private static int execute(CommandSourceStack sender, Collection<ServerPlayer> targets) {
-+        for (ServerPlayer player : targets) {
-+            boolean result = RamBarTask.instance().togglePlayer(player.getBukkitEntity());
-+            player.ramBar(result);
-+
-+            Component output = MiniMessage.miniMessage().deserialize(PurpurConfig.rambarCommandOutput,
-+                    Placeholder.component("onoff", Component.translatable(result ? "options.on" : "options.off")
-+                            .color(result ? NamedTextColor.GREEN : NamedTextColor.RED)),
-+                    Placeholder.parsed("target", player.getGameProfile().getName()));
-+
-+            sender.sendSuccess(output, false);
-+        }
-+        return targets.size();
-+    }
-+}
-diff --git a/src/main/java/org/purpurmc/purpur/command/RamCommand.java b/src/main/java/org/purpurmc/purpur/command/RamCommand.java
-new file mode 100644
-index 0000000000000000000000000000000000000000..992f8dfc628c7485e335191e1308cdfd4eedfbe8
---- /dev/null
-+++ b/src/main/java/org/purpurmc/purpur/command/RamCommand.java
-@@ -0,0 +1,30 @@
-+package org.purpurmc.purpur.command;
-+
-+import com.mojang.brigadier.CommandDispatcher;
-+import io.papermc.paper.adventure.PaperAdventure;
-+import net.kyori.adventure.text.minimessage.MiniMessage;
-+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
-+import net.minecraft.commands.CommandSourceStack;
-+import net.minecraft.commands.Commands;
-+import org.purpurmc.purpur.PurpurConfig;
-+import org.purpurmc.purpur.task.RamBarTask;
-+
-+public class RamCommand {
-+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
-+        dispatcher.register(Commands.literal("ram")
-+                .requires(listener -> listener.hasPermission(2, "bukkit.command.ram"))
-+                .executes(context -> {
-+                    CommandSourceStack sender = context.getSource();
-+                    RamBarTask ramBar = RamBarTask.instance();
-+                    sender.sendSuccess(() -> PaperAdventure.asVanilla(MiniMessage.miniMessage().deserialize(PurpurConfig.ramCommandOutput,
-+                            Placeholder.component("allocated", ramBar.format(ramBar.getAllocated())),
-+                            Placeholder.component("used", ramBar.format(ramBar.getUsed())),
-+                            Placeholder.component("xmx", ramBar.format(ramBar.getXmx())),
-+                            Placeholder.component("xms", ramBar.format(ramBar.getXms())),
-+                            Placeholder.unparsed("percent", ((int) (ramBar.getPercent() * 100)) + "%")
-+                    )), false);
-+                    return 1;
-+                })
-+        );
-+    }
-+}
-diff --git a/src/main/java/org/purpurmc/purpur/task/BossBarTask.java b/src/main/java/org/purpurmc/purpur/task/BossBarTask.java
-index 65c1bac3daf781c66442350ba08c43b21d2f1637..3c3d4cd52db93b97a40321030a70ebc282c9636b 100644
---- a/src/main/java/org/purpurmc/purpur/task/BossBarTask.java
-+++ b/src/main/java/org/purpurmc/purpur/task/BossBarTask.java
-@@ -89,17 +89,22 @@ public abstract class BossBarTask extends BukkitRunnable {
-     }
- 
-     public static void startAll() {
-+        RamBarTask.instance().start();
-         TPSBarTask.instance().start();
-         CompassTask.instance().start();
-     }
- 
-     public static void stopAll() {
-+        RamBarTask.instance().stop();
-         TPSBarTask.instance().stop();
-         CompassTask.instance().stop();
-     }
- 
-     public static void addToAll(ServerPlayer player) {
-         Player bukkit = player.getBukkitEntity();
-+        if (player.ramBar()) {
-+            RamBarTask.instance().addPlayer(bukkit);
-+        }
-         if (player.tpsBar()) {
-             TPSBarTask.instance().addPlayer(bukkit);
-         }
-@@ -109,6 +114,7 @@ public abstract class BossBarTask extends BukkitRunnable {
-     }
- 
-     public static void removeFromAll(Player player) {
-+        RamBarTask.instance().removePlayer(player);
-         TPSBarTask.instance().removePlayer(player);
-         CompassTask.instance().removePlayer(player);
-     }
-diff --git a/src/main/java/org/purpurmc/purpur/task/RamBarTask.java b/src/main/java/org/purpurmc/purpur/task/RamBarTask.java
-new file mode 100644
-index 0000000000000000000000000000000000000000..8e98c0ae73e2c40002a72b5d0d246ffa0c3ab38f
---- /dev/null
-+++ b/src/main/java/org/purpurmc/purpur/task/RamBarTask.java
-@@ -0,0 +1,117 @@
-+package org.purpurmc.purpur.task;
-+
-+import net.kyori.adventure.bossbar.BossBar;
-+import net.kyori.adventure.text.Component;
-+import net.kyori.adventure.text.minimessage.MiniMessage;
-+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
-+import org.bukkit.entity.Player;
-+import org.purpurmc.purpur.PurpurConfig;
-+
-+import java.lang.management.ManagementFactory;
-+import java.lang.management.MemoryUsage;
-+
-+public class RamBarTask extends BossBarTask {
-+    private static RamBarTask instance;
-+    private long allocated = 0L;
-+    private long used = 0L;
-+    private long xmx = 0L;
-+    private long xms = 0L;
-+    private float percent = 0F;
-+    private int tick = 0;
-+
-+    public static RamBarTask instance() {
-+        if (instance == null) {
-+            instance = new RamBarTask();
-+        }
-+        return instance;
-+    }
-+
-+    @Override
-+    BossBar createBossBar() {
-+        return BossBar.bossBar(Component.text(""), 0.0F, instance().getBossBarColor(), PurpurConfig.commandRamBarProgressOverlay);
-+    }
-+
-+    @Override
-+    void updateBossBar(BossBar bossbar, Player player) {
-+        bossbar.progress(getBossBarProgress());
-+        bossbar.color(getBossBarColor());
-+        bossbar.name(MiniMessage.miniMessage().deserialize(PurpurConfig.commandRamBarTitle,
-+                Placeholder.component("allocated", format(this.allocated)),
-+                Placeholder.component("used", format(this.used)),
-+                Placeholder.component("xmx", format(this.xmx)),
-+                Placeholder.component("xms", format(this.xms)),
-+                Placeholder.unparsed("percent", ((int) (this.percent * 100)) + "%")
-+        ));
-+    }
-+
-+    @Override
-+    public void run() {
-+        if (++this.tick < PurpurConfig.commandRamBarTickInterval) {
-+            return;
-+        }
-+        this.tick = 0;
-+
-+        MemoryUsage heap = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
-+
-+        this.allocated = heap.getCommitted();
-+        this.used = heap.getUsed();
-+        this.xmx = heap.getMax();
-+        this.xms = heap.getInit();
-+        this.percent = Math.max(Math.min((float) this.used / this.xmx, 1.0F), 0.0F);
-+
-+        super.run();
-+    }
-+
-+    private float getBossBarProgress() {
-+        return this.percent;
-+    }
-+
-+    private BossBar.Color getBossBarColor() {
-+        if (this.percent < 0.5F) {
-+            return PurpurConfig.commandRamBarProgressColorGood;
-+        } else if (this.percent < 0.75F) {
-+            return PurpurConfig.commandRamBarProgressColorMedium;
-+        } else {
-+            return PurpurConfig.commandRamBarProgressColorLow;
-+        }
-+    }
-+
-+    public Component format(long v) {
-+        String color;
-+        if (this.percent < 0.60F) {
-+            color = PurpurConfig.commandRamBarTextColorGood;
-+        } else if (this.percent < 0.85F) {
-+            color = PurpurConfig.commandRamBarTextColorMedium;
-+        } else {
-+            color = PurpurConfig.commandRamBarTextColorLow;
-+        }
-+        String value;
-+        if (v < 1024) {
-+            value = v + "B";
-+        } else {
-+            int z = (63 - Long.numberOfLeadingZeros(v)) / 10;
-+            value = String.format("%.1f%s", (double) v / (1L << (z * 10)), "BKMGTPE".charAt(z));
-+        }
-+        return MiniMessage.miniMessage().deserialize(color, Placeholder.unparsed("text", value));
-+    }
-+
-+    public long getAllocated() {
-+        return this.allocated;
-+    }
-+
-+    public long getUsed() {
-+        return this.used;
-+    }
-+
-+    public long getXmx() {
-+        return this.xmx;
-+    }
-+
-+    public long getXms() {
-+        return this.xms;
-+    }
-+
-+    public float getPercent() {
-+        return this.percent;
-+    }
-+}

purpur-server/minecraft-patches/sources/net/minecraft/commands/Commands.java.patch

@@ -8,7 +8,7 @@
  import org.slf4j.Logger;
  
  public class Commands {
-@@ -245,6 +_,12 @@
+@@ -245,6 +_,14 @@
              StopCommand.register(this.dispatcher);
              TransferCommand.register(this.dispatcher);
              WhitelistCommand.register(this.dispatcher);
@@ -18,6 +18,8 @@
 +            org.purpurmc.purpur.command.UptimeCommand.register(this.dispatcher); // Purpur - Add uptime command
 +            org.purpurmc.purpur.command.TPSBarCommand.register(this.dispatcher); // Purpur - Implement TPSBar
 +            org.purpurmc.purpur.command.CompassCommand.register(this.dispatcher); // Purpur - Add compass command
++            org.purpurmc.purpur.command.RamBarCommand.register(this.dispatcher); // Purpur - Add rambar command
++            org.purpurmc.purpur.command.RamCommand.register(this.dispatcher); // Purpur - Add ram command
          }
  
          if (selection.includeIntegrated) {

purpur-server/minecraft-patches/sources/net/minecraft/server/level/ServerPlayer.java.patch

@@ -1,31 +1,34 @@
 --- a/net/minecraft/server/level/ServerPlayer.java
 +++ b/net/minecraft/server/level/ServerPlayer.java
-@@ -393,6 +_,9 @@
+@@ -393,6 +_,10 @@
      public com.destroystokyo.paper.event.entity.PlayerNaturallySpawnCreaturesEvent playerNaturallySpawnedEvent; // Paper - PlayerNaturallySpawnCreaturesEvent
      public @Nullable String clientBrandName = null; // Paper - Brand support
      public org.bukkit.event.player.PlayerQuitEvent.QuitReason quitReason = null; // Paper - Add API for quit reason; there are a lot of changes to do if we change all methods leading to the event
 +    public boolean purpurClient = false; // Purpur - Purpur client support
 +    private boolean tpsBar = false; // Purpur - Implement TPSBar
 +    private boolean compassBar = false; // Purpur - Add compass command
++    private boolean ramBar = false; // Purpur - Implement rambar commands
  
      // Paper start - rewrite chunk system
      private ca.spottedleaf.moonrise.patches.chunk_system.player.RegionizedPlayerChunkLoader.PlayerChunkLoaderData chunkLoader;
-@@ -561,6 +_,9 @@
+@@ -561,6 +_,10 @@
          if (tag != null) {
              BlockPos.CODEC.parse(NbtOps.INSTANCE, tag).resultOrPartial(LOGGER::error).ifPresent(pos -> this.raidOmenPosition = pos);
          }
 +
 +        if (compound.contains("Purpur.TPSBar")) { this.tpsBar = compound.getBoolean("Purpur.TPSBar"); } // Purpur - Implement TPSBar
 +        if (compound.contains("Purpur.CompassBar")) { this.compassBar = compound.getBoolean("Purpur.CompassBar"); } // Purpur - Add compass command
++        if (compound.contains("Purpur.RamBar")) { this.ramBar = compound.getBoolean("Purpur.RamBar"); } // Purpur - Implement rambar command
      }
  
      @Override
-@@ -605,6 +_,8 @@
+@@ -605,6 +_,9 @@
          }
  
          this.saveEnderPearls(compound);
 +        compound.putBoolean("Purpur.TPSBar", this.tpsBar); // Purpur - Implement TPSBar
 +        compound.putBoolean("Purpur.CompassBar", this.compassBar); // Purpur - Add compass command
++        compound.putBoolean("Purpur.CompassBar", this.compassBar); // Purpur - Add rambar command
      }
  
      private void saveParentVehicle(CompoundTag tag) {
@@ -214,7 +217,7 @@
  
      public ServerStatsCounter getStats() {
          return this.stats;
-@@ -3077,4 +_,46 @@
+@@ -3077,4 +_,56 @@
          return (org.bukkit.craftbukkit.entity.CraftPlayer) super.getBukkitEntity();
      }
      // CraftBukkit end
@@ -260,4 +263,14 @@
 +        this.compassBar = compassBar;
 +    }
 +    // Purpur end - Add compass command
++
++    // Purpur start - Add rambar command
++    public boolean ramBar() {
++        return this.ramBar;
++    }
++
++    public void ramBar(boolean ramBar) {
++        this.ramBar = ramBar;
++    }
++    // Purpur end - Add rambar command
  }

purpur-server/src/main/java/org/purpurmc/purpur/PurpurConfig.java

@@ -178,6 +178,8 @@ public class PurpurConfig {
     public static String creditsCommandOutput = "<green>%s has been shown the end credits";
     public static String demoCommandOutput = "<green>%s has been shown the demo screen";
     public static String pingCommandOutput = "<green>%s's ping is %sms";
+    public static String ramCommandOutput = "<green>Ram Usage: <used>/<xmx> (<percent>)";
+    public static String rambarCommandOutput = "<green>Rambar toggled <onoff> for <target>";
     public static String tpsbarCommandOutput = "<green>Tpsbar toggled <onoff> for <target>";
     public static String dontRunWithScissors = "<red><italic>Don't run with scissors!";
     public static String uptimeCommandOutput = "<green>Server uptime is <uptime>";
@@ -195,6 +197,8 @@ public class PurpurConfig {
         creditsCommandOutput = getString("settings.messages.credits-command-output", creditsCommandOutput);
         demoCommandOutput = getString("settings.messages.demo-command-output", demoCommandOutput);
         pingCommandOutput = getString("settings.messages.ping-command-output", pingCommandOutput);
+        ramCommandOutput = getString("settings.messages.ram-command-output", ramCommandOutput);
+        rambarCommandOutput = getString("settings.messages.rambar-command-output", rambarCommandOutput);
         tpsbarCommandOutput = getString("settings.messages.tpsbar-command-output", tpsbarCommandOutput);
         dontRunWithScissors = getString("settings.messages.dont-run-with-scissors", dontRunWithScissors);
         uptimeCommandOutput = getString("settings.messages.uptime-command-output", uptimeCommandOutput);
@@ -243,6 +247,15 @@ public class PurpurConfig {
         disableGiveCommandDrops = getBoolean("settings.disable-give-dropping", disableGiveCommandDrops);
     }
 
+    public static String commandRamBarTitle = "<gray>Ram<yellow>:</yellow> <used>/<xmx> (<percent>)";
+    public static BossBar.Overlay commandRamBarProgressOverlay = BossBar.Overlay.NOTCHED_20;
+    public static BossBar.Color commandRamBarProgressColorGood = BossBar.Color.GREEN;
+    public static BossBar.Color commandRamBarProgressColorMedium = BossBar.Color.YELLOW;
+    public static BossBar.Color commandRamBarProgressColorLow = BossBar.Color.RED;
+    public static String commandRamBarTextColorGood = "<gradient:#55ff55:#00aa00><text></gradient>";
+    public static String commandRamBarTextColorMedium = "<gradient:#ffff55:#ffaa00><text></gradient>";
+    public static String commandRamBarTextColorLow = "<gradient:#ff5555:#aa0000><text></gradient>";
+    public static int commandRamBarTickInterval = 20;
     public static String commandTPSBarTitle = "<gray>TPS<yellow>:</yellow> <tps> MSPT<yellow>:</yellow> <mspt> Ping<yellow>:</yellow> <ping>ms";
     public static BossBar.Overlay commandTPSBarProgressOverlay = BossBar.Overlay.NOTCHED_20;
     public static TPSBarTask.FillMode commandTPSBarProgressFillMode = TPSBarTask.FillMode.MSPT;
@@ -270,6 +283,16 @@ public class PurpurConfig {
     public static String uptimeSecond = "%02d second";
     public static String uptimeSeconds = "%02d seconds";
     private static void commandSettings() {
+        commandRamBarTitle = getString("settings.command.rambar.title", commandRamBarTitle);
+        commandRamBarProgressOverlay = BossBar.Overlay.valueOf(getString("settings.command.rambar.overlay", commandRamBarProgressOverlay.name()));
+        commandRamBarProgressColorGood = BossBar.Color.valueOf(getString("settings.command.rambar.progress-color.good", commandRamBarProgressColorGood.name()));
+        commandRamBarProgressColorMedium = BossBar.Color.valueOf(getString("settings.command.rambar.progress-color.medium", commandRamBarProgressColorMedium.name()));
+        commandRamBarProgressColorLow = BossBar.Color.valueOf(getString("settings.command.rambar.progress-color.low", commandRamBarProgressColorLow.name()));
+        commandRamBarTextColorGood = getString("settings.command.rambar.text-color.good", commandRamBarTextColorGood);
+        commandRamBarTextColorMedium = getString("settings.command.rambar.text-color.medium", commandRamBarTextColorMedium);
+        commandRamBarTextColorLow = getString("settings.command.rambar.text-color.low", commandRamBarTextColorLow);
+        commandRamBarTickInterval = getInt("settings.command.rambar.tick-interval", commandRamBarTickInterval);
+
         commandTPSBarTitle = getString("settings.command.tpsbar.title", commandTPSBarTitle);
         commandTPSBarProgressOverlay = BossBar.Overlay.valueOf(getString("settings.command.tpsbar.overlay", commandTPSBarProgressOverlay.name()));
         commandTPSBarProgressFillMode = TPSBarTask.FillMode.valueOf(getString("settings.command.tpsbar.fill-mode", commandTPSBarProgressFillMode.name()));

purpur-server/src/main/java/org/purpurmc/purpur/command/RamBarCommand.java

@@ -0,0 +1,44 @@
+package org.purpurmc.purpur.command;
+
+import com.mojang.brigadier.CommandDispatcher;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.commands.Commands;
+import net.minecraft.commands.arguments.EntityArgument;
+import net.minecraft.server.level.ServerPlayer;
+import org.purpurmc.purpur.PurpurConfig;
+import org.purpurmc.purpur.task.RamBarTask;
+
+import java.util.Collection;
+import java.util.Collections;
+
+public class RamBarCommand {
+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
+        dispatcher.register(Commands.literal("rambar")
+                .requires(listener -> listener.hasPermission(2, "bukkit.command.rambar"))
+                .executes(context -> execute(context.getSource(), Collections.singleton(context.getSource().getPlayerOrException())))
+                .then(Commands.argument("targets", EntityArgument.players())
+                        .requires(listener -> listener.hasPermission(2, "bukkit.command.rambar.other"))
+                        .executes((context) -> execute(context.getSource(), EntityArgument.getPlayers(context, "targets")))
+                )
+        );
+    }
+
+    private static int execute(CommandSourceStack sender, Collection<ServerPlayer> targets) {
+        for (ServerPlayer player : targets) {
+            boolean result = RamBarTask.instance().togglePlayer(player.getBukkitEntity());
+            player.ramBar(result);
+
+            Component output = MiniMessage.miniMessage().deserialize(PurpurConfig.rambarCommandOutput,
+                    Placeholder.component("onoff", Component.translatable(result ? "options.on" : "options.off")
+                            .color(result ? NamedTextColor.GREEN : NamedTextColor.RED)),
+                    Placeholder.parsed("target", player.getGameProfile().getName()));
+
+            sender.sendSuccess(output, false);
+        }
+        return targets.size();
+    }
+}

purpur-server/src/main/java/org/purpurmc/purpur/command/RamCommand.java

@@ -0,0 +1,30 @@
+package org.purpurmc.purpur.command;
+
+import com.mojang.brigadier.CommandDispatcher;
+import io.papermc.paper.adventure.PaperAdventure;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import net.minecraft.commands.CommandSourceStack;
+import net.minecraft.commands.Commands;
+import org.purpurmc.purpur.PurpurConfig;
+import org.purpurmc.purpur.task.RamBarTask;
+
+public class RamCommand {
+    public static void register(CommandDispatcher<CommandSourceStack> dispatcher) {
+        dispatcher.register(Commands.literal("ram")
+                .requires(listener -> listener.hasPermission(2, "bukkit.command.ram"))
+                .executes(context -> {
+                    CommandSourceStack sender = context.getSource();
+                    RamBarTask ramBar = RamBarTask.instance();
+                    sender.sendSuccess(() -> PaperAdventure.asVanilla(MiniMessage.miniMessage().deserialize(PurpurConfig.ramCommandOutput,
+                            Placeholder.component("allocated", ramBar.format(ramBar.getAllocated())),
+                            Placeholder.component("used", ramBar.format(ramBar.getUsed())),
+                            Placeholder.component("xmx", ramBar.format(ramBar.getXmx())),
+                            Placeholder.component("xms", ramBar.format(ramBar.getXms())),
+                            Placeholder.unparsed("percent", ((int) (ramBar.getPercent() * 100)) + "%")
+                    )), false);
+                    return 1;
+                })
+        );
+    }
+}

purpur-server/src/main/java/org/purpurmc/purpur/task/BossBarTask.java

@@ -89,17 +89,22 @@ public abstract class BossBarTask extends BukkitRunnable {
     }
 
     public static void startAll() {
+        RamBarTask.instance().start();
         TPSBarTask.instance().start();
         CompassTask.instance().start();
     }
 
     public static void stopAll() {
+        RamBarTask.instance().stop();
         TPSBarTask.instance().stop();
         CompassTask.instance().stop();
     }
 
     public static void addToAll(ServerPlayer player) {
         Player bukkit = player.getBukkitEntity();
+        if (player.ramBar()) {
+            RamBarTask.instance().addPlayer(bukkit);
+        }
         if (player.tpsBar()) {
             TPSBarTask.instance().addPlayer(bukkit);
         }
@@ -109,6 +114,7 @@ public abstract class BossBarTask extends BukkitRunnable {
     }
 
     public static void removeFromAll(Player player) {
+        RamBarTask.instance().removePlayer(player);
         TPSBarTask.instance().removePlayer(player);
         CompassTask.instance().removePlayer(player);
     }

purpur-server/src/main/java/org/purpurmc/purpur/task/RamBarTask.java

@@ -0,0 +1,117 @@
+package org.purpurmc.purpur.task;
+
+import net.kyori.adventure.bossbar.BossBar;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
+import org.bukkit.entity.Player;
+import org.purpurmc.purpur.PurpurConfig;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryUsage;
+
+public class RamBarTask extends BossBarTask {
+    private static RamBarTask instance;
+    private long allocated = 0L;
+    private long used = 0L;
+    private long xmx = 0L;
+    private long xms = 0L;
+    private float percent = 0F;
+    private int tick = 0;
+
+    public static RamBarTask instance() {
+        if (instance == null) {
+            instance = new RamBarTask();
+        }
+        return instance;
+    }
+
+    @Override
+    BossBar createBossBar() {
+        return BossBar.bossBar(Component.text(""), 0.0F, instance().getBossBarColor(), PurpurConfig.commandRamBarProgressOverlay);
+    }
+
+    @Override
+    void updateBossBar(BossBar bossbar, Player player) {
+        bossbar.progress(getBossBarProgress());
+        bossbar.color(getBossBarColor());
+        bossbar.name(MiniMessage.miniMessage().deserialize(PurpurConfig.commandRamBarTitle,
+                Placeholder.component("allocated", format(this.allocated)),
+                Placeholder.component("used", format(this.used)),
+                Placeholder.component("xmx", format(this.xmx)),
+                Placeholder.component("xms", format(this.xms)),
+                Placeholder.unparsed("percent", ((int) (this.percent * 100)) + "%")
+        ));
+    }
+
+    @Override
+    public void run() {
+        if (++this.tick < PurpurConfig.commandRamBarTickInterval) {
+            return;
+        }
+        this.tick = 0;
+
+        MemoryUsage heap = ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
+
+        this.allocated = heap.getCommitted();
+        this.used = heap.getUsed();
+        this.xmx = heap.getMax();
+        this.xms = heap.getInit();
+        this.percent = Math.max(Math.min((float) this.used / this.xmx, 1.0F), 0.0F);
+
+        super.run();
+    }
+
+    private float getBossBarProgress() {
+        return this.percent;
+    }
+
+    private BossBar.Color getBossBarColor() {
+        if (this.percent < 0.5F) {
+            return PurpurConfig.commandRamBarProgressColorGood;
+        } else if (this.percent < 0.75F) {
+            return PurpurConfig.commandRamBarProgressColorMedium;
+        } else {
+            return PurpurConfig.commandRamBarProgressColorLow;
+        }
+    }
+
+    public Component format(long v) {
+        String color;
+        if (this.percent < 0.60F) {
+            color = PurpurConfig.commandRamBarTextColorGood;
+        } else if (this.percent < 0.85F) {
+            color = PurpurConfig.commandRamBarTextColorMedium;
+        } else {
+            color = PurpurConfig.commandRamBarTextColorLow;
+        }
+        String value;
+        if (v < 1024) {
+            value = v + "B";
+        } else {
+            int z = (63 - Long.numberOfLeadingZeros(v)) / 10;
+            value = String.format("%.1f%s", (double) v / (1L << (z * 10)), "BKMGTPE".charAt(z));
+        }
+        return MiniMessage.miniMessage().deserialize(color, Placeholder.unparsed("text", value));
+    }
+
+    public long getAllocated() {
+        return this.allocated;
+    }
+
+    public long getUsed() {
+        return this.used;
+    }
+
+    public long getXmx() {
+        return this.xmx;
+    }
+
+    public long getXms() {
+        return this.xms;
+    }
+
+    public float getPercent() {
+        return this.percent;
+    }
+}