[WIP] Improve Brigadier Documentation

config/sidebar.paper.ts

@@ -131,7 +131,49 @@ const paper: SidebarsConfig = {
               type: "category",
               label: "Brigadier Command API",
               collapsed: true,
-              items: ["dev/api/command-api/commands", "dev/api/command-api/arguments"],
+              items: [
+                {
+                  type: "category",
+                  label: "Basics",
+                  collapsed: true,
+                  items: [
+                    "dev/api/command-api/basics/introduction",
+                    "dev/api/command-api/basics/command-tree",
+                    "dev/api/command-api/basics/arguments-and-literals",
+                    "dev/api/command-api/basics/command-executors",
+                    "dev/api/command-api/basics/command-registration",
+                  ],
+                },
+                {
+                  type: "category",
+                  label: "Arguments",
+                  collapsed: true,
+                  items: [
+                    "dev/api/command-api/arguments/minecraft-arguments",
+                    "dev/api/command-api/arguments/location-arguments",
+                    "dev/api/command-api/arguments/entity-player-arguments",
+                    "dev/api/command-api/arguments/registry-arguments",
+                    "dev/api/command-api/arguments/enum-value-arguments",
+                    "dev/api/command-api/arguments/predicate-arguments",
+                    "dev/api/command-api/arguments/adventure-arguments",
+                  ],
+                },
+                {
+                  type: "category",
+                  label: "Misc",
+                  collapsed: true,
+                  items: [
+                    "dev/api/command-api/misc/comparison-bukkit-brigadier",
+                    "dev/api/command-api/misc/basic-command",
+                  ],
+                },
+              ],
+            },
+            {
+              type: "category",
+              label: "Old Brigadier Command API",
+              collapsed: true,
+              items: ["dev/api/command-api-old/commands", "dev/api/command-api-old/arguments"],
             },
             {
               type: "category",

docs/paper/dev/api/command-api/arguments/adventure-arguments.mdx

@@ -0,0 +1,187 @@
+---
+slug: /dev/command-api/arguments/adventure-arguments
+description: Documentation for all arguments returning Adventure API objects
+---
+
+import ComponentMp4 from "./assets/vanilla-arguments/component.mp4"
+import KeyMp4 from "./assets/vanilla-arguments/key.mp4"
+import NamedColorMp4 from "./assets/vanilla-arguments/namedcolor.mp4"
+import StyleMp4 from "./assets/vanilla-arguments/style.mp4"
+import SignedMessageMp4 from "./assets/vanilla-arguments/signedmessage.mp4"
+
+# Adventure Library Arguments
+These arguments return a class from the `net.kyori` package. They are *technically* not native to Minecraft or Bukkit, but as Paper includes the Adventure library, they are
+usually widely used in the Paper ecosystem.
+
+
+## Component Argument
+The component argument is a very complicated command for the user, which is why it should not be used for usual user input. It follows the same format as the `/tellraw <player> <msg>`
+command for its second argument. It accepts a text component as its json representation, returning it as an Adventure component to work with.
+
+### Example usage
+```java
+public static LiteralCommandNode<CommandSourceStack> componentArgument() {
+    return Commands.literal("componentargument")
+        .then(Commands.argument("arg", ArgumentTypes.component())
+            .executes(ctx -> {
+                final Component component = ctx.getArgument("arg", Component.class);
+
+                ctx.getSource().getSender().sendRichMessage(
+                    "Your message: <input>",
+                    Placeholder.component("input", component)
+                );
+                return Command.SINGLE_SUCCESS;
+            }))
+        .build();
+}
+```
+
+### In-game preview
+<FullWidthVideo src={ComponentMp4}/>
+
+
+
+## Key Argument
+The key argument allows a user to put in any artificial (namespaced) key, ensuring its validity. This returns a `net.kyori.adventure.key.Key` from the adventure library, 
+which can be used at various other places in the Bukkit/Paper API.
+
+### Example usage
+```java
+public static LiteralCommandNode<CommandSourceStack> keyArgument() {
+    return Commands.literal("key")
+        .then(Commands.argument("key_input", ArgumentTypes.key())
+            .executes(ctx -> {
+                final Key key = ctx.getArgument("key_input", Key.class);
+
+                ctx.getSource().getSender().sendRichMessage("You put in <aqua><key></aqua>!",
+                    Placeholder.unparsed("key", key.asString())
+                );                    
+
+                return Command.SINGLE_SUCCESS;
+            }))
+        .build();
+}
+```
+
+### In-game preview
+<FullWidthVideo src={KeyMp4}/>
+
+
+
+## Named Color Argument
+This argument provides the user with the ability to select between the 16 build-in "named" text colors. This argument returns a `net.kyori.adventure.text.format.NamedTextColor` that
+
+you can use for styling components.
+
+### Example usage
+```java
+public static LiteralCommandNode<CommandSourceStack> namedColorArgument() {
+    return Commands.literal("namedcolor")
+        .then(Commands.argument("color", ArgumentTypes.namedColor())
+            .then(Commands.argument("message", StringArgumentType.greedyString())
+                .executes(ctx -> {
+                    final NamedTextColor color = ctx.getArgument("color", NamedTextColor.class);
+                    final String msg = ctx.getArgument("message", String.class);
+
+                    ctx.getSource().getSender().sendMessage(
+                        Component.text(msg).color(color)
+                    );
+                    return Command.SINGLE_SUCCESS;
+                })))
+        .build();
+}
+```
+
+### In-game preview
+<FullWidthVideo src={NamedColorMp4}/>
+
+
+
+## Adventure Style Argument
+:::note
+
+Similar to the component argument, this argument is not really appropriate for general user input, as it also follows the json format for displaying components. Most users
+do not know how to use that format and thus its public usage is not advised.
+
+:::
+
+The style argument returns its value in form of an `net.kyori.adventure.text.format.Style` object. This can be applied to any component using `Component#style(Style)`.
+
+Whilst the json input allows for the `text` field, it does not actually do anything.
+
+### Example usage
+```java
+public static LiteralCommandNode<CommandSourceStack> styleArgument() {
+    return Commands.literal("style")
+        .then(Commands.argument("style", ArgumentTypes.style())
+            .then(Commands.argument("message", StringArgumentType.greedyString())
+                .executes(ctx -> {
+                    final Style style = ctx.getArgument("style", Style.class);
+                    final String message = ctx.getArgument("message", String.class);
+
+                    ctx.getSource().getSender().sendRichMessage("Your input: <input>",
+                        Placeholder.component("input", Component.text(message).style(style))
+                    );
+                    return Command.SINGLE_SUCCESS;
+                })))
+        .build();
+}
+```
+
+### In-game preview
+<FullWidthVideo src={StyleMp4}/>
+
+
+
+## Signed Message Argument
+The signed message argument allows a player (not a console!!) to send an argument in form of a **signed message** to the server. This signed message is a special type - it
+allows the server to send that message, without the ability to directly modify it, to any player. The visible difference is that unsigned messages have a white bar at the left,
+whilst signed messages don't.
+
+A signed message argument returns a `SignedMessageResolver`. In order to call its `#resolve` method, you have to pass in two parameters:
+* The argument name
+* The `CommandContext<CommandSourceStack>` object
+
+You then get returned with a `CompletableFuture<SignedMessage>`. In order to work with the resulting `SignedMessage`, you can call `CompletableFuture<T>#thenAccept(Consumer<T>)`
+on that resulting completable future. Inside of that, you can send the signed message to players or work with it in other ways.
+
+:::warning
+
+The use of thread unsafe Bukkit API inside the `.thenAccept` method is not supported, as this is an asynchronous method, which does not run on the main thread.
+If you need to use Bukkit API, you can schedule a task to be run on the next available tick. You can read up on that **here** (WIP).
+
+:::
+
+:::note
+
+A non-player sender is not capable of sending a signed message, which means that the method block inside the `#thenAccept` method of the `SignedMessageResolver#resolve` method
+will never be called. You should make sure to put a `.requires(ctx -> ctx.getSender() instanceof Player)` on your SignedArgument to only allow Players to run it. You may
+add a fallback greedy string argument for non-player senders if you want the argument to execute regardless of signing or not.
+
+:::
+
+### Example usage
+```java title="MinecraftArguments.java"
+public static LiteralCommandNode<CommandSourceStack> signedMessageArgument() {
+    return Commands.literal("signedmessage")
+        .then(Commands.argument("target", ArgumentTypes.player())
+            .then(Commands.argument("message", ArgumentTypes.signedMessage())
+                .executes(MinecraftArguments::executeSignedMessageCommand)))
+        .build();
+}
+
+private static int executeSignedMessageCommand(final CommandContext<CommandSourceStack> ctx) throws CommandSyntaxException {
+    final Player target = ctx.getArgument("target", PlayerSelectorArgumentResolver.class).resolve(ctx.getSource()).getFirst();
+    final SignedMessageResolver messageResolver = ctx.getArgument("message", SignedMessageResolver.class);
+
+    messageResolver.resolveSignedMessage("message", ctx).thenAccept(msg -> {
+        target.sendMessage(msg, ChatType.CHAT.bind(ctx.getSource().getSender().name()));
+    });
+
+
+    return Command.SINGLE_SUCCESS;
+}
+```
+
+### In-game preview
+<FullWidthVideo src={SignedMessageMp4}/>