ChatCommandAPI

Getting started

1. Include API in your project

Simply run dotnet add package baer1.ChatCommandAPI or add the following line to your csproj file:

<PackageReference Include="baer1.ChatCommandAPI" Version="0.*"/>

Additionally, you should reference this mod in both your main plugin class and your manifest.json (replace <VERSION> with the actual version you are using):

...
[BepInPlugin(MyPluginInfo.PLUGIN_GUID, MyPluginInfo.PLUGIN_NAME, MyPluginInfo.PLUGIN_VERSION)]
[BepInDependency("baer1.ChatCommandAPI", BepInDependency.DependencyFlags.HardDependency)]
public class ExampleMod : BaseUnityPlugin
...

...
"dependencies": [
"BepInEx-BepInExPack-5.4.2100",
"baer1-ChatCommandAPI-<VERSION>",
...
]
...

2. Create Command Subclass

Simply create a non-static class that inherits the ChatCommandAPI.Command class. The Invoke method contains the logic that will be run.

The default command name is the class name you assign to it, ExampleCommand in the example below. You can run this command through the in-game chat. (See below for changing it)

This mod is case-insensitive (/eXaMpLeCoMmAnD is valid)

Example:

using System.Collections.Generic;
using ChatCommandAPI;

namespace ExampleMod;

public class ExampleCommand : Command
{
    public override bool Invoke(string[] args, Dictionary<string, string> kwargs, out string error)
    {
        error = null!;
        // Put your code here
        return true;
    }
}

3. Instantiate the Subclass once

namespace ExampleMod;

public class ChatCommandAPI : BaseUnityPlugin
{
    private void Awake()
    {
        _ = new ExampleCommand();
    }
}

4. Done!

You can now use the command /examplecommand in-game to run the function defined in Step 2

Advanced usage

Customizing the command

You can overwrite several properties of the Command class to customize your command:

using System.Collections.Generic;
using ChatCommandAPI;

namespace ExampleMod;

public class ExampleCommand : Command
{
    public override string Name => "Example"; // Command name (default: Class name)
    public override string[] Commands =>
        ["MyCommand", Name, "ExampleCommand", "Command", "HelloWorld"]; // Aliases (first entry is displayed on help, default: Name)
    public override string Description => "Prints Hello World [amount] times"; // Short description of this command
    public override string[] Syntax => ["", "[amount]"]; // All valid syntaxes for this command (only for help, not validated)
    public override bool Hidden => false; // Whether to hide this command from the help list (useful for debugging, default: false)

    public override bool Invoke(string[] args, Dictionary<string, string> kwargs, out string error)
    {
        error = "Invalid argument"; // Set error for return value false
        ushort amount = 1;
        if (args.Length > 0)
            if (!ushort.TryParse(args[0], out amount))
                return false; // Return value false: reports error to user
        while (amount > 0)
        {
            ChatCommandAPI.ChatCommandAPI.Instance.Print("Hello, World!");
            amount--;
        }
        return true; // Return value true: success, doesn't do anything
    }
}

The above results in the following being displayed on the help list:

Example - Prints Hello World [amount] times
/MyCommand
/MyCommand [amount]

Using ToggleCommand

If you are creating a command that is supposed to act as a toggle (on or off), you can use the ToggleCommand class to make this easier.

You can override the Value property to access it externally or in harmony patches:

using GameNetcodeStuff;
using HarmonyLib;
using ChatCommandAPI;

namespace ExampleMod;

public class ExampleToggleCommand : ToggleCommand
{
    public override string Name => "BlockJump"; // Command name
    public override string ToggleDescription => "Blocks jump inputs"; // Use ToggleDescription instead of Description
    public override string EnabledString => "blocked"; // String to use when Value=false
    public override string DisabledString => "unblocked"; // String to use when Value=true

    public override void PrintValue() => ChatCommandAPI.Print($"Jump inputs {ValueString}"); // Called after value is updated, for user feedback

    public override bool Value // Redirect reads and writes to static property
    {
        get => BlockJump;
        set => BlockJump = value;
    }
    public static bool BlockJump { get; internal set; } // Static property for external access

    [HarmonyPatch(typeof(PlayerControllerB), nameof(PlayerControllerB.Jump_performed))]
    internal class Patch
    {
        private static bool Prefix() => !BlockJump; // Block jump
    }
}

Player arguments

If you want to allow a player name as an argument, you should use the Utils.GetPlayer function:

using System.Collections.Generic;
using ChatCommandAPI;
using GameNetcodeStuff;

namespace ExampleMod;

public class ExamplePlayerCommand : Command
{
    public override string Name => "IsPlayerDead"; // Command name
    public override string Description => "Shows if a player is dead"; // Command description
    public override string[] Syntax => ["[player]"];

    public override bool Invoke(string[] args, Dictionary<string, string> kwargs, out string error)
    {
        error = null!; // Don't set error message like "Player not found", this error is reported by the GetPlayer function automatically
        PlayerControllerB player = GameNetworkManager.Instance.localPlayerController;
        if (args.Length > 0)
            if (!Utils.GetPlayer(args[0]))
                return false; // Report failure, no error message, prevents further execution
        ChatCommandAPI.ChatCommandAPI.Print(
            player.isPlayerDead
                ? $"Player {player.playerUsername} is dead."
                : $"Player {player.playerUsername} is not dead."
        );
        return true; // Report success
    }
}