Added Cooldown attribute

Added the command 'purge'

Pootis-Bot/Core/CommandHandler.cs

@@ -67,6 +67,8 @@ private async Task HandleCommandAsync(SocketMessage messageParam)
                 var result = await _commands.ExecuteAsync(context, argPos, services: null);
 				if (!result.IsSuccess && result.Error == CommandError.BadArgCount)
 					await context.Channel.SendMessageAsync($"The command `{msg.Content.Replace(Global.botPrefix, "")}` either has too many or too little arguments!");
+				else if (!result.IsSuccess && result.Error == CommandError.UnmetPrecondition)
+					await context.Channel.SendMessageAsync(result.ErrorReason);
 				else if (!result.IsSuccess && result.Error != CommandError.UnknownCommand)
 					Global.Log(result.ErrorReason, ConsoleColor.Red);
             }

Pootis-Bot/Core/Global.cs

@@ -21,7 +21,7 @@ internal static class Global
                                                            // Main Server                -  Development Server
         internal static readonly string[] discordServers = { "https://discord.creepysin.com", "https://discord.gg/m4YcsUa" };
 
-        internal static readonly string version = "0.2.7";
+        internal static readonly string version = "0.2.8";
         internal static readonly string aboutMessage = $"Pootis Bot --- | --- {version}\n" +
             $"Created by Creepysin licensed under the MIT license. Vist {githubPage}/blob/master/LICENSE.md for more info.\n\n" +
             $"Pootis Robot icon by Valve\n" +

Pootis-Bot/Entities/GlobalServerList.cs

@@ -29,6 +29,12 @@ public struct VoiceChannel
         {
             public ulong ID { get; set; }
             public string Name { get; set;}
+
+			public VoiceChannel(ulong id, string name)
+			{
+				ID = id;
+				Name = name;
+			}
         }
 
         public class CommandInfo

Pootis-Bot/Modules/Audio/Music.cs

@@ -2,6 +2,7 @@
 using Discord;
 using Discord.Commands;
 using Pootis_Bot.Core;
+using Pootis_Bot.Preconditions;
 using Pootis_Bot.Services;
 
 namespace Pootis_Bot.Modules.Audio
@@ -22,6 +23,7 @@ public Music()
 
         [Command("join", RunMode = RunMode.Async)]
         [Summary("Joins in the current voice channel you are in")]
+		[Cooldown(5)]
         [RequireBotPermission(GuildPermission.Connect)]
         [RequireBotPermission(GuildPermission.Speak)]
         public async Task JoinCmd()
@@ -50,6 +52,7 @@ public async Task LeaveCmd()
 
         [Command("play", RunMode = RunMode.Async)]
         [Summary("Plays a song")]
+		[Cooldown(5)]
         [RequireBotPermission(GuildPermission.Speak)]
         public async Task PlayCmd([Remainder] string song = "")
         {

Pootis-Bot/Modules/Audio/VoiceChannels.cs

@@ -5,6 +5,7 @@
 using Discord.Rest;
 using Pootis_Bot.Core;
 using Pootis_Bot.Entities;
+using Pootis_Bot.Preconditions;
 
 namespace Pootis_Bot.Modules.Audio
 {
@@ -14,17 +15,14 @@ public class VoiceChannels : ModuleBase<ICommandContext>
         [RequireBotPermission(GuildPermission.ManageChannels)]
         [RequireBotPermission(GuildPermission.MoveMembers)]
         [RequireUserPermission(GuildPermission.ManageChannels)]
+		[Cooldown(5)]
         public async Task AddVoiceChannel(string baseName)
         {
             RestVoiceChannel channel = await (Context.Guild as SocketGuild).CreateVoiceChannelAsync($"➕ New {baseName} VC");
 
             await Context.Channel.SendMessageAsync($"Added {baseName} as an auto voice channel.");
 
-            GlobalServerList.VoiceChannel voiceChannel = new GlobalServerList.VoiceChannel
-            {
-                ID = channel.Id,
-                Name = baseName
-            };
+			GlobalServerList.VoiceChannel voiceChannel = new GlobalServerList.VoiceChannel(channel.Id, baseName);
 
             ServerLists.GetServer((SocketGuild)Context.Guild).VoiceChannels.Add(voiceChannel);
             ServerLists.SaveServerList();

Pootis-Bot/Modules/Basic/Basic.cs

@@ -5,6 +5,7 @@
 using Discord.Commands;
 using Discord.WebSocket;
 using Pootis_Bot.Core;
+using Pootis_Bot.Preconditions;
 using Pootis_Bot.Entities;
 
 namespace Pootis_Bot.Modules.Basic
@@ -18,6 +19,7 @@ public class BasicCommands : ModuleBase<SocketCommandContext>
 
         [Command("hello")]
         [Summary("Displays the 'hello' message")]
+		[Cooldown(5)]
         public async Task Hello()
         {
             var embed = new EmbedBuilder();
@@ -37,6 +39,7 @@ public async Task Hello()
 
         [Command("server")]
         [Summary("Gets details about the server you are in")]
+		[Cooldown(5)]
         public async Task ServerGuild()
         {
             var guilduser = (SocketGuildUser)Context.User;

Pootis-Bot/Modules/Server/ServerAdminCommands.cs

@@ -1,5 +1,6 @@
 using Discord;
 using Discord.Commands;
+using Discord.WebSocket;
 using System.Threading.Tasks;
 
 namespace Pootis_Bot.Modules.Server
@@ -30,5 +31,20 @@ public async Task BanUser(IGuildUser user, int days = 0, [Remainder]string reaso
             await user.BanAsync(days, reason);
             await Context.Channel.SendMessageAsync($"The user {user.Username} was banned");
         }
+
+		[Command("purge", RunMode = RunMode.Async)]
+		[Summary("Deletes bulk messages")]
+		[RequireBotPermission(GuildPermission.ManageMessages)]
+		[RequireUserPermission(GuildPermission.ManageMessages)]
+		public async Task Purge(int messageCount = 10)
+		{
+			var messages = Context.Channel.GetMessagesAsync(messageCount + 1).FlattenAsync();
+
+			await (Context.Channel as SocketTextChannel).DeleteMessagesAsync(messages.Result);
+
+			var message = await Context.Channel.SendMessageAsync($"{messageCount} message were deleted, the message will be deleted in a moment.");
+			await Task.Delay(3000);
+			await message.DeleteAsync();
+		}
     }
 }

Pootis-Bot/Preconditions/CooldownAttribute.cs

@@ -0,0 +1,53 @@
+using System;
+using System.Collections.Concurrent;
+using System.Threading.Tasks;
+using Discord.Commands;
+
+namespace Pootis_Bot.Preconditions
+{
+	public class CooldownAttribute : PreconditionAttribute
+	{
+		TimeSpan CooldownLength { get; set; }
+		readonly ConcurrentDictionary<CooldownInfo, DateTime> _cooldowns = new ConcurrentDictionary<CooldownInfo, DateTime>();
+
+		public CooldownAttribute(int seconds)
+		{
+			CooldownLength = TimeSpan.FromSeconds(seconds);
+		}
+
+		public struct CooldownInfo
+		{
+			public ulong UserId { get; }
+			public int CommandHashCode { get; }
+
+			public CooldownInfo(ulong userId, int commandHashCode)
+			{
+				UserId = userId;
+				CommandHashCode = commandHashCode;
+			}
+		}
+
+		public override Task<PreconditionResult> CheckPermissionsAsync(ICommandContext context, CommandInfo command, IServiceProvider services)
+		{
+			var key = new CooldownInfo(context.User.Id, command.GetHashCode());
+
+			if (_cooldowns.TryGetValue(key, out DateTime endsAt))
+			{
+				var difference = endsAt.Subtract(DateTime.Now);
+				if (difference.Ticks > 0)
+				{
+					return Task.FromResult(PreconditionResult.FromError($"Please wait {difference.ToString(@"ss")} seconds before trying again!"));
+				}
+
+				var time = DateTime.Now.Add(CooldownLength);
+				_cooldowns.TryUpdate(key, time, endsAt);
+			}
+			else
+			{
+				_cooldowns.TryAdd(key, DateTime.Now.Add(CooldownLength));
+			}
+
+			return Task.FromResult(PreconditionResult.FromSuccess());
+		}
+	}
+}

Pootis-Bot/Preconditions/GuildOwnerAttribute.cs

@@ -4,9 +4,6 @@
 
 namespace Pootis_Bot.Preconditions
 {
-	//
-	// Summary:
-	//     Requires the command to be invoked by the owner of the Discord server.
 	[AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, AllowMultiple = true)]
 	public class RequireGuildOwnerAttribute : PreconditionAttribute
 	{
@@ -15,7 +12,7 @@ public override Task<PreconditionResult> CheckPermissionsAsync(ICommandContext c
 			if (context.User.Id == context.Guild.OwnerId)
 				return Task.FromResult(PreconditionResult.FromSuccess());
 			else
-				return Task.FromResult(PreconditionResult.FromError("You are not the owner of this Discord server!"));
+				return Task.FromResult(PreconditionResult.FromError("You are not the owner of this Discord server, you cannot run this command!"));
 		}
 	}
 }