Extend /create ponder command functionality

src/main/java/com/simibubi/create/foundation/command/PonderCommand.java

@@ -1,13 +1,26 @@
 package com.simibubi.create.foundation.command;
 
+import com.google.common.collect.ImmutableList;
 import com.mojang.brigadier.builder.ArgumentBuilder;
+import com.mojang.brigadier.suggestion.SuggestionProvider;
 import com.simibubi.create.foundation.networking.AllPackets;
+import com.simibubi.create.foundation.networking.PonderPacket;
+import com.simibubi.create.foundation.ponder.PonderRegistry;
 import net.minecraft.command.CommandSource;
 import net.minecraft.command.Commands;
+import net.minecraft.command.ISuggestionProvider;
+import net.minecraft.command.arguments.EntityArgument;
+import net.minecraft.command.arguments.ResourceLocationArgument;
+import net.minecraft.command.arguments.SuggestionProviders;
 import net.minecraft.entity.player.ServerPlayerEntity;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.common.util.FakePlayer;
 import net.minecraftforge.fml.network.PacketDistributor;
 
+import java.util.Collection;
+
 public class PonderCommand {
+	public static final SuggestionProvider<CommandSource> ALL_PONDERS = SuggestionProviders.register(new ResourceLocation("all_ponders"), (iSuggestionProviderCommandContext, builder) -> ISuggestionProvider.func_212476_a(PonderRegistry.all.keySet().stream(), builder));
 
 	static ArgumentBuilder<CommandSource, ?> register() {
 		return Commands.literal("ponder")
@@ -20,6 +33,21 @@ public class PonderCommand {
 							new ConfigureConfigPacket(ConfigureConfigPacket.Actions.ponderIndex.name(), ""));
 
 					return 1;
-				});
+				})
+			.then(Commands.argument("scene", ResourceLocationArgument.resourceLocation()).suggests(ALL_PONDERS)
+			.executes(context -> openScene(ResourceLocationArgument.getResourceLocation(context, "scene"), ImmutableList.of(context.getSource().asPlayer())))
+			.then(Commands.argument("targets", EntityArgument.players())
+				.requires(cs -> cs.hasPermissionLevel(2))
+				.executes(context -> openScene(ResourceLocationArgument.getResourceLocation(context, "scene"), EntityArgument.getPlayers(context, "targets")))));
+
+	}
+
+	private static int openScene(ResourceLocation scene, Collection<? extends ServerPlayerEntity> players) {
+		for (ServerPlayerEntity player : players) {
+			if (player instanceof FakePlayer)
+				continue;
+			AllPackets.channel.send(PacketDistributor.PLAYER.with(() -> player), new PonderPacket(scene));
+		}
+		return 1;
 	}
 }

src/main/java/com/simibubi/create/foundation/networking/AllPackets.java

@@ -91,6 +91,7 @@ public enum AllPackets {
 	BLOCK_HIGHLIGHT(HighlightPacket.class, HighlightPacket::new, PLAY_TO_CLIENT),
 	TUNNEL_FLAP(TunnelFlapPacket.class, TunnelFlapPacket::new, PLAY_TO_CLIENT),
 	FUNNEL_FLAP(FunnelFlapPacket.class, FunnelFlapPacket::new, PLAY_TO_CLIENT),
+	OPEN_PONDER(PonderPacket.class, PonderPacket::new, PLAY_TO_CLIENT)
 
 	;
 

src/main/java/com/simibubi/create/foundation/networking/PonderPacket.java

@@ -0,0 +1,45 @@
+package com.simibubi.create.foundation.networking;
+
+import com.simibubi.create.Create;
+import com.simibubi.create.foundation.gui.ScreenOpener;
+import com.simibubi.create.foundation.ponder.PonderRegistry;
+import com.simibubi.create.foundation.ponder.PonderUI;
+import mcp.MethodsReturnNonnullByDefault;
+import net.minecraft.network.PacketBuffer;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.fml.network.NetworkDirection;
+import net.minecraftforge.fml.network.NetworkEvent;
+
+import javax.annotation.ParametersAreNonnullByDefault;
+import java.util.function.Supplier;
+
+@ParametersAreNonnullByDefault
+@MethodsReturnNonnullByDefault
+public class PonderPacket extends SimplePacketBase {
+	private final ResourceLocation scene;
+
+	public PonderPacket(ResourceLocation scene) {
+		this.scene = scene;
+	}
+
+	public PonderPacket(PacketBuffer buffer) {
+		this.scene = buffer.readResourceLocation();
+	}
+
+	@Override
+	public void write(PacketBuffer buffer) {
+		buffer.writeResourceLocation(scene);
+	}
+
+	@Override
+	public void handle(Supplier<NetworkEvent.Context> context) {
+		NetworkEvent.Context ctx = context.get();
+		if (ctx.getDirection() != NetworkDirection.PLAY_TO_CLIENT)
+			return;
+		if (PonderRegistry.all.containsKey(scene))
+			ScreenOpener.transitionTo(new PonderUI(PonderRegistry.compile(PonderRegistry.all.get(scene))));
+		else
+			Create.logger.error("Could not find ponder scene: " + scene);
+		ctx.setPacketHandled(true);
+	}
+}