Valour-Bot-Guide/Guides/4.MessagesAndCommands.md

# Receiving messages and Making commands

Now that we can send messages to a channel using the bot its time to receive messages from users so that we can make commands!

**Unfortunately due to a bug in the Valour SDK at this moment the caching of channels isnt working and so we have to do a workaround**


First lets start with making it so the bot can see every channel for every planet its in. We can do this by editing the code just a little bit and looping through each planet and then opening every channel:

```c#
// Fetch all the planets instead of just the first
foreach (Planet planet in client.PlanetService.JoinedPlanets)
{
    await planet.EnsureReadyAsync();
    await planet.FetchInitialDataAsync();

    foreach (Channel chan in planet.Channels)
    {
        channelCache[chan.Id] = chan;

        // If the channel is a chat channel then open that channel to the bot to see.
        if (chan.ChannelType == ChannelTypeEnum.PlanetChat)
        {
            // Open the channel with your bots name!
            await chan.OpenWithResult("YourBotName");
        }
    }
}
```

After every channel is open we have to make the bot listen for incoming messages.

```c#
// Get all messages that are send into text channels
client.MessageService.MessageReceived += onMessageReceived;
```

In order to use this listener we have to make a Function called onMessageReceived (or whatever you named it above). We can do this directly on the listener but some things are restricted by doing this (idk dont ask :P)

Inside this listener is where we execute what we want to do with the incoming message. In this example we have a simple Ping command that replys with Pong!

```c#
// Function for what to do with the received messages
async Task onMessageReceived(Message message)
{
    // Prefix.. duh..
    string prefix = "bg/";
    // What the message says
    string content = message.Content;

    // Get the channel that the message was sent in
    if (!channelCache.TryGetValue(message.ChannelId, out var channel)) return;

    // If the message doesnt start with the prefix then just ignore it
    if (!content.StartsWith(prefix)) return;

    // Check if the message is the prefix + ping
    if (content.StartsWith($"{prefix}ping"))
    {
        // Sends the message `Pong!` to the channel
        await channel.SendMessageAsync("Pong!");
    }
}
```

This is the basics of how to get commands working with a bot on Valour.
<br><br>
### Full code below

```c#
using Valour.Sdk.Client;
using Valour.Shared;
using DotNetEnv;
using Valour.Sdk.Models;
using Valour.Shared.Models;

ValourClient client = new ValourClient("https://api.valour.gg/");
client.SetupHttpClient();

Env.Load();

string token = Environment.GetEnvironmentVariable("TOKEN") ?? string.Empty;

Dictionary<long, Channel> channelCache = new();

if (string.IsNullOrWhiteSpace(token)) 
{
    Console.WriteLine($"Token invalid. Please make sure you set a valid token in your .env");
    return;
}

TaskResult loginResult = await client.InitializeUser(token);
if (!loginResult.Success)
{
    Console.WriteLine($"Login failed: {loginResult.Message}");
}

Console.WriteLine($"Logged in as {client.Me.Name} (ID: {client.Me.Id})");

// Fetch all the planets instead of just the first
foreach (Planet planet in client.PlanetService.JoinedPlanets)
{
    await planet.EnsureReadyAsync();
    await planet.FetchInitialDataAsync();

    foreach (Channel chan in planet.Channels)
    {
        channelCache[chan.Id] = chan;

        // If the channel is a chat channel then open that channel to the bot to see.
        if (chan.ChannelType == ChannelTypeEnum.PlanetChat)
        {
            // Open the channel with your bots name!
            await chan.OpenWithResult("YourBotName");
        }
    }
}

// Get all messages that are send into text channels
client.MessageService.MessageReceived += onMessageReceived;

// Function for what to do with the received messages
async Task onMessageReceived(Message message)
{
    // Prefix.. duh..
    string prefix = "bg/";
    // What the message says
    string content = message.Content;

    // Get the channel that the message was sent in
    if (!channelCache.TryGetValue(message.ChannelId, out var channel)) return;

    // If the message doesnt start with the prefix then just ignore it
    if (!content.StartsWith(prefix)) return;

    // Check if the message is the prefix + ping
    if (content.StartsWith($"{prefix}ping"))
    {
        // Sends the message `Pong!` to the channel
        await channel.SendMessageAsync("Pong!");
    }
}

await Task.Delay(Timeout.Infinite);
```

##
## End of Bot Guide (for now)