now >pick has 60 seconds cooldown

src/NadekoBot/Modules/Games/Commands/PlantAndPickCommands.cs

@@ -35,6 +35,8 @@ namespace NadekoBot.Modules.Games
             //channelId/last generation
             private static ConcurrentDictionary<ulong, DateTime> lastGenerations { get; } = new ConcurrentDictionary<ulong, DateTime>();
 
+            private static ConcurrentHashSet<ulong> usersRecentlyPicked { get; } = new ConcurrentHashSet<ulong>();
+
             private static float chance { get; }
             private static int cooldown { get; }
             private static Logger _log { get; }
@@ -101,11 +103,11 @@ namespace NadekoBot.Modules.Games
             {
                 var channel = (ITextChannel)imsg.Channel;
 
-                if (!channel.Guild.GetCurrentUser().GetPermissions(channel).ManageMessages)
-                {
-                    await channel.SendErrorAsync("I need manage channel permissions in order to process this command.").ConfigureAwait(false);
+                if (!channel.Guild.GetCurrentUser().GetPermissions(channel).ManageMessages || !usersRecentlyPicked.Add(imsg.Author.Id))
                     return;
-                }
+
+                try
+                {
 
                     List<IUserMessage> msgs;
 
@@ -119,6 +121,12 @@ namespace NadekoBot.Modules.Games
                     var msg = await channel.SendConfirmAsync($"**{imsg.Author}** picked {msgs.Count}{Gambling.Gambling.CurrencySign}!").ConfigureAwait(false);
                     msg.DeleteAfter(10);
                 }
+                finally
+                {
+                    await Task.Delay(60000);
+                    usersRecentlyPicked.TryRemove(imsg.Author.Id);
+                }
+            }
 
             [NadekoCommand, Usage, Description, Aliases]
             [RequireContext(ContextType.Guild)]

src/NadekoBot/Resources/CommandStrings.Designer.cs

@@ -4767,7 +4767,7 @@ namespace NadekoBot.Resources {
         }
         
         /// <summary>
-        ///    Looks up a localized string similar to Picks the currency planted in this channel..
+        ///    Looks up a localized string similar to Picks the currency planted in this channel. 60 seconds cooldown..
         /// </summary>
         public static string pick_desc {
             get {

src/NadekoBot/Resources/CommandStrings.resx

@@ -1363,7 +1363,7 @@
     <value>pick</value>
   </data>
   <data name="pick_desc" xml:space="preserve">
-    <value>Picks the currency planted in this channel.</value>
+    <value>Picks the currency planted in this channel. 60 seconds cooldown.</value>
   </data>
   <data name="pick_usage" xml:space="preserve">
     <value>`{0}pick`</value>

src/NadekoBot/Services/CommandHandler.cs

@@ -64,15 +64,22 @@ namespace NadekoBot.Services
             _client.MessageReceived += MessageReceivedHandler;
         }
 
-        private async Task MessageReceivedHandler(IMessage msg)
+        private Task MessageReceivedHandler(IMessage msg)
         {
             var usrMsg = msg as IUserMessage;
             if (usrMsg == null)
-                return;
+                return Task.CompletedTask;
 
             if (usrMsg.Author.IsBot || !NadekoBot.Ready) //no bots
-                return;
+                return Task.CompletedTask;
 
+            var throwaway = Task.Run(async () =>
+            {
+                var sw = new Stopwatch();
+                sw.Start();
+
+                try
+                {
                     var guild = (msg.Channel as ITextChannel)?.Guild;
 
                     if (guild != null && guild.OwnerId != usrMsg.Author.Id)
@@ -139,13 +146,6 @@ namespace NadekoBot.Services
                     }
                     catch { }
 
-            var throwaway = Task.Run(async () =>
-            {
-                var sw = new Stopwatch();
-                sw.Start();
-
-                try
-                {
                     var t = await ExecuteCommand(usrMsg, usrMsg.Content, guild, usrMsg.Author, MultiMatchHandling.Best);
                     var command = t.Item1;
                     var permCache = t.Item2;
@@ -209,7 +209,8 @@ namespace NadekoBot.Services
                         _log.Warn(ex.InnerException, "Inner Exception of the error in CommandHandler");
                 }
             });
-            return;
+
+            return Task.CompletedTask;
         }
 
         public async Task<Tuple<Command, PermissionCache, IResult>> ExecuteCommand(IUserMessage message, string input, IGuild guild, IUser user, MultiMatchHandling multiMatchHandling = MultiMatchHandling.Best) {