add an unscuffed precondition attribute (#2976)

* fix lul

* why does v3 has to be so scuffed

src/Discord.Net.Interactions/Attributes/Preconditions/RequireAppPermissionAttribute.cs

@@ -0,0 +1,77 @@
+using System.Threading.Tasks;
+using System;
+
+namespace Discord.Interactions;
+
+/// <summary>
+///     Requires the bot to have a specific permission in the channel a command is invoked in.
+/// </summary>
+[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
+public class RequireAppPermissionAttribute : PreconditionAttribute
+{
+    /// <summary>
+    ///     Gets the specified <see cref="Discord.GuildPermission" /> of the precondition.
+    /// </summary>
+    public GuildPermission? GuildPermission { get; }
+
+    /// <summary>
+    ///     Gets the specified <see cref="Discord.ChannelPermission" /> of the precondition.
+    /// </summary>
+    public ChannelPermission? ChannelPermission { get; }
+
+    /// <summary>
+    ///     Gets or sets the error message if the precondition
+    ///     fails due to being run outside of a Guild channel.
+    /// </summary>
+    public string NotAGuildErrorMessage { get; set; }
+
+    /// <summary>
+    ///     Requires the bot account to have a specific <see cref="Discord.GuildPermission"/>.
+    /// </summary>
+    /// <remarks>
+    ///     This precondition will always fail if the command is being invoked in a <see cref="IPrivateChannel"/>.
+    /// </remarks>
+    /// <param name="permission">
+    ///     The <see cref="Discord.GuildPermission"/> that the bot must have. Multiple permissions can be specified
+    ///     by ORing the permissions together.
+    /// </param>
+    public RequireAppPermissionAttribute(GuildPermission permission)
+    {
+        GuildPermission = permission;
+        ChannelPermission = null;
+    }
+    /// <summary>
+    ///     Requires that the bot account to have a specific <see cref="Discord.ChannelPermission"/>.
+    /// </summary>
+    /// <param name="permission">
+    ///     The <see cref="Discord.ChannelPermission"/> that the bot must have. Multiple permissions can be
+    ///     specified by ORing the permissions together.
+    /// </param>
+    public RequireAppPermissionAttribute(ChannelPermission permission)
+    {
+        ChannelPermission = permission;
+        GuildPermission = null;
+    }
+
+    /// <inheritdoc />
+    public override Task<PreconditionResult> CheckRequirementsAsync(IInteractionContext context, ICommandInfo command, IServiceProvider services)
+    {
+        if (GuildPermission.HasValue)
+        {
+            if (context.Interaction.GuildId is null)
+                return Task.FromResult(PreconditionResult.FromError(NotAGuildErrorMessage ?? "Command must be used in a guild channel."));
+            if (context.Interaction.Permissions.Has(GuildPermission.Value))
+                return Task.FromResult(PreconditionResult.FromError(ErrorMessage ?? $"Bot requires guild permission {GuildPermission.Value}."));
+        }
+
+        if (ChannelPermission.HasValue)
+        {
+            var channelPerms = new ChannelPermissions(context.Interaction.Permissions.RawValue);
+            if (!channelPerms.Has(ChannelPermission.Value))
+                return Task.FromResult(PreconditionResult.FromError(ErrorMessage ?? $"Bot requires channel permission {ChannelPermission.Value}."));
+        }
+
+        return Task.FromResult(PreconditionResult.FromSuccess());
+    }
+
+}

src/Discord.Net.Interactions/Attributes/Preconditions/RequireBotPermissionAttribute.cs

@@ -7,6 +7,7 @@ namespace Discord.Interactions
     ///     Requires the bot to have a specific permission in the channel a command is invoked in.
     /// </summary>
     [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true, Inherited = true)]
+    [Obsolete("This attribute does not support user app interactions. Consider switching to 'RequireAppPermissionAttribute'", false)]
     public class RequireBotPermissionAttribute : PreconditionAttribute
     {
         /// <summary>