Add a /geyser ping command (#4131)

* Init: Add /geyser ping command

* Block just console execution, not everything but console senders

* Use RTT as that seems to vary less wildly compared to getPing()

* Cleanup, use lang strings

* Add ping() method to GeyserConnection in api

* Update to cloud changes

api/src/main/java/org/geysermc/geyser/api/connection/GeyserConnection.java

@@ -132,4 +132,9 @@ public interface GeyserConnection extends Connection, CommandSource {
     @Deprecated
     @NonNull
     Set<String> fogEffects();
+
+    /**
+     * Returns the current ping of the connection.
+     */
+    int ping();
 }

core/src/main/java/org/geysermc/geyser/command/CommandRegistry.java

@@ -43,6 +43,7 @@ import org.geysermc.geyser.command.defaults.ExtensionsCommand;
 import org.geysermc.geyser.command.defaults.HelpCommand;
 import org.geysermc.geyser.command.defaults.ListCommand;
 import org.geysermc.geyser.command.defaults.OffhandCommand;
+import org.geysermc.geyser.command.defaults.PingCommand;
 import org.geysermc.geyser.command.defaults.ReloadCommand;
 import org.geysermc.geyser.command.defaults.SettingsCommand;
 import org.geysermc.geyser.command.defaults.StatisticsCommand;
@@ -139,6 +140,7 @@ public class CommandRegistry implements EventRegistrar {
         registerBuiltInCommand(new AdvancementsCommand("advancements", "geyser.commands.advancements.desc", "geyser.command.advancements"));
         registerBuiltInCommand(new AdvancedTooltipsCommand("tooltips", "geyser.commands.advancedtooltips.desc", "geyser.command.tooltips"));
         registerBuiltInCommand(new ConnectionTestCommand(geyser, "connectiontest", "geyser.commands.connectiontest.desc", "geyser.command.connectiontest"));
+        registerBuiltInCommand(new PingCommand("ping", "geyser.commands.ping.desc", "geyser.command.ping"));
         if (this.geyser.getPlatformType() == PlatformType.STANDALONE) {
             registerBuiltInCommand(new StopCommand(geyser, "stop", "geyser.commands.stop.desc", "geyser.command.stop"));
         }

core/src/main/java/org/geysermc/geyser/command/defaults/PingCommand.java

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2019-2023 GeyserMC. http://geysermc.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @author GeyserMC
+ * @link https://github.com/GeyserMC/Geyser
+ */
+
+package org.geysermc.geyser.command.defaults;
+
+import org.geysermc.geyser.api.util.TriState;
+import org.geysermc.geyser.command.GeyserCommand;
+import org.geysermc.geyser.command.GeyserCommandSource;
+import org.geysermc.geyser.session.GeyserSession;
+import org.geysermc.geyser.text.GeyserLocale;
+import org.incendo.cloud.context.CommandContext;
+
+import java.util.Objects;
+
+public class PingCommand extends GeyserCommand {
+
+    public PingCommand(String name, String description, String permission) {
+        super(name, description, permission, TriState.TRUE, true, true);
+    }
+
+    @Override
+    public void execute(CommandContext<GeyserCommandSource> context) {
+        GeyserSession session = Objects.requireNonNull(context.sender().connection());
+        session.sendMessage(GeyserLocale.getPlayerLocaleString("geyser.commands.ping.message", session.locale(), session.ping()));
+    }
+}
+

core/src/main/java/org/geysermc/geyser/session/GeyserSession.java

@@ -54,6 +54,8 @@ import org.cloudburstmc.math.vector.Vector3d;
 import org.cloudburstmc.math.vector.Vector3f;
 import org.cloudburstmc.math.vector.Vector3i;
 import org.cloudburstmc.nbt.NbtMap;
+import org.cloudburstmc.netty.channel.raknet.RakChildChannel;
+import org.cloudburstmc.netty.handler.codec.raknet.common.RakSessionCodec;
 import org.cloudburstmc.protocol.bedrock.BedrockDisconnectReasons;
 import org.cloudburstmc.protocol.bedrock.BedrockServerSession;
 import org.cloudburstmc.protocol.bedrock.data.Ability;
@@ -2098,6 +2100,12 @@ public class GeyserSession implements GeyserConnection, GeyserCommandSource {
         return this.cameraData.fogEffects();
     }
 
+    @Override
+    public int ping() {
+        RakSessionCodec rakSessionCodec = ((RakChildChannel) getUpstream().getSession().getPeer().getChannel()).rakPipeline().get(RakSessionCodec.class);
+        return (int) Math.floor(rakSessionCodec.getPing());
+    }
+
     public void addCommandEnum(String name, String enums) {
         softEnumPacket(name, SoftEnumUpdateType.ADD, enums);
     }