From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Sweepyoface <github@sweepy.pw>
Date: Sat, 17 Jun 2017 18:48:21 -0400
Subject: [PATCH] Add UnknownCommandEvent

Co-authored-by: Jake Potrebic <jake.m.potrebic@gmail.com>

diff --git a/src/main/java/net/minecraft/commands/CommandSourceStack.java b/src/main/java/net/minecraft/commands/CommandSourceStack.java
index 36bbe7d0b2089361beda89097c15eca9ab48a57d..65d8c7d5aab8c6afe3c5671a90ad0fbc03bedfdd 100644
--- a/src/main/java/net/minecraft/commands/CommandSourceStack.java
+++ b/src/main/java/net/minecraft/commands/CommandSourceStack.java
@@ -328,8 +328,13 @@ public class CommandSourceStack implements SharedSuggestionProvider {
     }
 
     public void sendFailure(Component message) {
+        // Paper start
+        this.sendFailure(message, true);
+    }
+    public void sendFailure(Component message, boolean withStyle) {
+        // Paper end
         if (this.source.acceptsFailure() && !this.silent) {
-            this.source.sendSystemMessage(Component.empty().append(message).withStyle(ChatFormatting.RED));
+            this.source.sendSystemMessage(withStyle ? Component.empty().append(message).withStyle(ChatFormatting.RED) : message); // Paper
         }
 
     }
diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
index 971fc7f5f51ba82a7e8abafa6a5139c24a9aac0b..7f561ab6e56cd1749da8eff950080d3ae3f5e028 100644
--- a/src/main/java/net/minecraft/commands/Commands.java
+++ b/src/main/java/net/minecraft/commands/Commands.java
@@ -136,6 +136,7 @@ public class Commands {
     public static final int LEVEL_ADMINS = 3;
     public static final int LEVEL_OWNERS = 4;
     private final com.mojang.brigadier.CommandDispatcher<CommandSourceStack> dispatcher = new com.mojang.brigadier.CommandDispatcher();
+    public final java.util.List<CommandNode<CommandSourceStack>> vanillaCommandNodes = new java.util.ArrayList<>(); // Paper
 
     public Commands(Commands.CommandSelection environment, CommandBuildContext commandRegistryAccess) {
         this(); // CraftBukkit
@@ -226,6 +227,7 @@ public class Commands {
         if (environment.includeIntegrated) {
             PublishCommand.register(this.dispatcher);
         }
+        this.vanillaCommandNodes.addAll(this.dispatcher.getRoot().getChildren()); // Paper
 
         // CraftBukkit start
     }
@@ -317,7 +319,16 @@ public class Commands {
                 b1 = 0;
                 return b1;
             } catch (CommandSyntaxException commandsyntaxexception) {
-                commandlistenerwrapper.sendFailure(ComponentUtils.fromMessage(commandsyntaxexception.getRawMessage()));
+                // Paper start
+                final net.kyori.adventure.text.TextComponent.Builder builder = net.kyori.adventure.text.Component.text();
+                if ((parseresults.getContext().getNodes().isEmpty() || !this.vanillaCommandNodes.contains(parseresults.getContext().getNodes().get(0).getNode()))) {
+                    if (!org.spigotmc.SpigotConfig.unknownCommandMessage.isEmpty()) {
+                        builder.append(net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(org.spigotmc.SpigotConfig.unknownCommandMessage));
+                    }
+                } else {
+                // commandlistenerwrapper.sendFailure(ComponentUtils.fromMessage(commandsyntaxexception.getRawMessage()));
+                builder.color(net.kyori.adventure.text.format.NamedTextColor.RED).append(io.papermc.paper.brigadier.PaperBrigadier.componentFromMessage(commandsyntaxexception.getRawMessage()));
+                // Paper end
                 if (commandsyntaxexception.getInput() != null && commandsyntaxexception.getCursor() >= 0) {
                     int j = Math.min(commandsyntaxexception.getInput().length(), commandsyntaxexception.getCursor());
                     MutableComponent ichatmutablecomponent = Component.empty().withStyle(ChatFormatting.GRAY).withStyle((chatmodifier) -> {
@@ -336,7 +347,18 @@ public class Commands {
                     }
 
                     ichatmutablecomponent.append((Component) Component.translatable("command.context.here").withStyle(ChatFormatting.RED, ChatFormatting.ITALIC));
-                    commandlistenerwrapper.sendFailure(ichatmutablecomponent);
+                // Paper start
+                    // commandlistenerwrapper.sendFailure(ichatmutablecomponent);
+                    builder
+                        .append(net.kyori.adventure.text.Component.newline())
+                        .append(io.papermc.paper.adventure.PaperAdventure.asAdventure(ichatmutablecomponent));
+                }
+                }
+                org.bukkit.event.command.UnknownCommandEvent event = new org.bukkit.event.command.UnknownCommandEvent(commandlistenerwrapper.getBukkitSender(), s, org.spigotmc.SpigotConfig.unknownCommandMessage.isEmpty() ? null : builder.build());
+                org.bukkit.Bukkit.getServer().getPluginManager().callEvent(event);
+                if (event.message() != null) {
+                    commandlistenerwrapper.sendFailure(io.papermc.paper.adventure.PaperAdventure.asVanilla(event.message()), false);
+                // Paper end
                 }
 
                 b1 = 0;
diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 544ab33166e6410339dbd0ef70b692dfe33cd4fe..97bd0993b49e18b47c2316663025564bca4d4b41 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -523,6 +523,7 @@ public final class CraftServer implements Server {
                     }
                     node = clone;
                 }
+                dispatcher.vanillaCommandNodes.add(node); // Paper
 
                 dispatcher.getDispatcher().getRoot().addChild(node);
             } else {
@@ -904,7 +905,13 @@ public final class CraftServer implements Server {
 
         // Spigot start
         if (!org.spigotmc.SpigotConfig.unknownCommandMessage.isEmpty()) {
-            sender.sendMessage(org.spigotmc.SpigotConfig.unknownCommandMessage);
+            // Paper start
+            org.bukkit.event.command.UnknownCommandEvent event = new org.bukkit.event.command.UnknownCommandEvent(sender, commandLine, net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer.legacySection().deserialize(org.spigotmc.SpigotConfig.unknownCommandMessage));
+            Bukkit.getServer().getPluginManager().callEvent(event);
+            if (event.message() != null) {
+                sender.sendMessage(event.message());
+            }
+            // Paper end
         }
         // Spigot end