Implement shared "info" command

Displays ping, uptime, prefix, and version information

BrackeysBot.API/IBot.cs

@@ -24,5 +24,5 @@ public interface IBot
     ///     Gets the bot version.
     /// </summary>
     /// <value>The bot version.</value>
-    string Version { get; }
+    static string Version { get; } = string.Empty;
 }

BrackeysBot.API/Plugins/IPlugin.cs

@@ -16,6 +16,15 @@ public interface IPlugin : IDisposable, IConfigurationHolder
     /// <value>The data directory.</value>
     DirectoryInfo DataDirectory { get; }
 
+    /// <summary>
+    ///     Gets the date and time at which this plugin was last enabled.
+    /// </summary>
+    /// <value>
+    ///     A <see cref="DateTimeOffset" /> representing the date and time at which this plugin was enabled, or
+    ///     <see langword="null" /> if this plugin is not currently enabled.
+    /// </value>
+    DateTimeOffset? EnableTime { get; }
+
     /// <summary>
     ///     Gets the logger for this plugin.
     /// </summary>

BrackeysBot.API/Plugins/MonoPlugin.cs

@@ -14,18 +14,23 @@ namespace BrackeysBot.API.Plugins;
 /// </summary>
 public abstract class MonoPlugin : IPlugin
 {
-    /// <inheritdoc />
-    ~MonoPlugin()
-    {
-        Dispose();
-    }
+    internal AssemblyLoadContext LoadContext { get; set; } = null!;
+
+    /// <summary>
+    ///     Gets the underlying <see cref="DisCatSharp.DiscordClient" /> instance.
+    /// </summary>
+    /// <value>The underlying <see cref="DisCatSharp.DiscordClient" />.</value>
+    protected internal DiscordClient? DiscordClient { get; internal set; }
 
     /// <inheritdoc />
     public IConfiguration Configuration { get; internal set; } = null!;
 
     /// <inheritdoc />
     public DirectoryInfo DataDirectory { get; internal set; } = null!;
 
+    /// <inheritdoc />
+    public DateTimeOffset? EnableTime { get; internal set; } = null!;
+
     /// <inheritdoc />
     public ILogger Logger { get; internal set; } = null!;
 
@@ -38,19 +43,17 @@ public abstract class MonoPlugin : IPlugin
     /// <inheritdoc />
     public IServiceProvider ServiceProvider { get; internal set; } = null!;
 
-    internal AssemblyLoadContext LoadContext { get; set; } = null!;
-
-    /// <summary>
-    ///     Gets the underlying <see cref="DisCatSharp.DiscordClient" /> instance.
-    /// </summary>
-    /// <value>The underlying <see cref="DisCatSharp.DiscordClient" />.</value>
-    protected internal DiscordClient? DiscordClient { get; internal set; }
-
     /// <inheritdoc />
     public virtual void Dispose()
     {
     }
 
+    /// <inheritdoc />
+    ~MonoPlugin()
+    {
+        Dispose();
+    }
+
     /// <summary>
     ///     Allows configuration of the plugin's <see cref="IServiceProvider" />.
     /// </summary>

BrackeysBot/BrackeysBotApp.cs

@@ -19,10 +19,7 @@ internal sealed class BrackeysBotApp : BackgroundService, IBot
 {
     private readonly List<Assembly> _libraries = new();
 
-    /// <summary>
-    ///     Initializes a new instance of the <see cref="BrackeysBotApp" /> class.
-    /// </summary>
-    public BrackeysBotApp()
+    static BrackeysBotApp()
     {
         var apiAssembly = Assembly.GetAssembly(typeof(IBot))!;
         var assembly = Assembly.GetAssembly(typeof(BrackeysBotApp))!;
@@ -35,7 +32,7 @@ public BrackeysBotApp()
     ///     Gets the version of the API in use.
     /// </summary>
     /// <value>The API version.</value>
-    public string ApiVersion { get; }
+    public static string ApiVersion { get; }
 
     /// <summary>
     ///     Gets the <c>libraries</c> directory for this bot.
@@ -50,7 +47,7 @@ public BrackeysBotApp()
     public IPluginManager PluginManager { get; } = new SimplePluginManager();
 
     /// <inheritdoc />
-    public string Version { get; }
+    public static string Version { get; }
 
     /// <summary>
     ///     Disables all currently-loaded and currently-enabled plugins.

BrackeysBot/Commands/InfoCommand.cs

@@ -0,0 +1,73 @@
+using System;
+using System.Text;
+using System.Threading.Tasks;
+using BrackeysBot.API.Attributes;
+using BrackeysBot.API.Extensions;
+using BrackeysBot.API.Plugins;
+using DisCatSharp;
+using DisCatSharp.CommandsNext;
+using DisCatSharp.CommandsNext.Attributes;
+using DisCatSharp.Entities;
+
+namespace BrackeysBot.Commands;
+
+/// <summary>
+///     Represents a class which implements the <c>info</c> command. The <c>info</c> command requires the mention prefix to
+///     discern which bot details are being requested.
+/// </summary>
+internal sealed class InfoCommand : BaseCommandModule
+{
+    private readonly IPlugin _plugin;
+
+    /// <summary>
+    ///     Initializes a new instance of the <see cref="InfoCommand" /> class.
+    /// </summary>
+    /// <param name="plugin">The owning plugin.</param>
+    public InfoCommand(IPlugin plugin)
+    {
+        _plugin = plugin;
+    }
+
+    [Command("info")]
+    [Description("Displays information about the bot.")]
+    [RequireGuild]
+    [RequireMentionPrefix]
+    public async Task InfoCommandAsync(CommandContext context)
+    {
+        await context.AcknowledgeAsync();
+
+        DiscordColor color = 0;
+        DiscordGuild guild = context.Guild;
+        DiscordUser currentUser = context.Client.CurrentUser;
+
+        if (guild.Members.TryGetValue(currentUser.Id, out DiscordMember? member))
+            color = member.Color;
+
+        if (color.Value == 0)
+            color = 0x3F51B5;
+
+        var embed = new DiscordEmbedBuilder();
+        embed.WithFooter(guild.Name, guild.IconUrl);
+        embed.WithThumbnail(currentUser.GetAvatarUrl(ImageFormat.Png));
+        embed.WithColor(color);
+
+        string prefix = _plugin.Configuration.Get<string>("discord.prefix") ?? "[]";
+
+        embed.AddField(Formatter.Underline("Ping"), context.Client.Ping, true);
+        embed.AddField(Formatter.Underline("Prefix"), prefix, true);
+        embed.AddFieldIf(_plugin.EnableTime.HasValue, Formatter.Underline("Enabled"),
+            () => Formatter.Timestamp(_plugin.EnableTime!.Value), true);
+
+        var builder = new StringBuilder();
+        builder.AppendLine($"BrackeysBot: {BrackeysBotApp.Version}");
+        builder.AppendLine($"BrackeysBot.API: {BrackeysBotApp.ApiVersion}");
+        builder.AppendLine($"{_plugin.PluginInfo.Name}: {_plugin.PluginInfo.Version}");
+        builder.AppendLine($"DisCatSharp: {context.Client.VersionString}");
+        builder.AppendLine($"CLR: {Environment.Version}");
+        builder.AppendLine($"Host: {Environment.OSVersion}");
+
+        embed.AddField(Formatter.Underline("Version"), Formatter.BlockCode(builder.ToString().Trim()));
+
+        await context.RespondAsync(embed);
+    }
+}

BrackeysBot/Plugins/SimplePluginManager.cs

@@ -11,6 +11,7 @@
 using BrackeysBot.API.Exceptions;
 using BrackeysBot.API.Plugins;
 using BrackeysBot.ArgumentConverters;
+using BrackeysBot.Commands;
 using BrackeysBot.Configuration;
 using BrackeysBot.Resources;
 using DisCatSharp;
@@ -83,6 +84,7 @@ public void DisablePlugin(IPlugin plugin)
 
         _loadedPlugins[plugin] = false;
 
+        monoPlugin.EnableTime = null;
         monoPlugin.DiscordClient?.DisconnectAsync();
         Logger.Info(string.Format(LoggerMessages.DisabledPlugin, plugin.PluginInfo.Name, plugin.PluginInfo.Version));
     }
@@ -95,6 +97,8 @@ public void EnablePlugin(IPlugin plugin)
         if (_loadedPlugins[plugin]) return;
         if (plugin is not MonoPlugin monoPlugin) return;
 
+        monoPlugin.EnableTime = DateTimeOffset.UtcNow;
+
         foreach (IHostedService hostedService in plugin.ServiceProvider.GetServices<IHostedService>())
         {
             try
@@ -408,11 +412,14 @@ private IEnumerable<IPlugin> EnumeratePluginDependencies(Type pluginType)
 
         client.MessageCreated += (sender, e) => ClientOnMessageCreated(plugin, sender, e);
 
-        return client.UseCommandsNext(new CommandsNextConfiguration
+        CommandsNextExtension? commandsNext = client.UseCommandsNext(new CommandsNextConfiguration
         {
             ServiceProvider = plugin.ServiceProvider,
             UseDefaultCommandHandler = false
         });
+
+        commandsNext.RegisterCommands<InfoCommand>();
+        return commandsNext;
     }
 
     private void SetupPluginDataDirectory(PluginInfo pluginInfo, MonoPlugin instance)
@@ -471,6 +478,7 @@ private void SetupPluginServices(MonoPlugin instance, PluginInfo pluginInfo, Typ
         });
 
         serviceCollection.AddSingleton<IPluginManager>(this);
+        serviceCollection.AddSingleton<IPlugin>(instance);
         serviceCollection.AddSingleton(instance.GetType(), instance);
         serviceCollection.AddSingleton(instance.Configuration);