Add role remove command

ChaosBot/Discord/Modules/Admin/Role.cs

@@ -131,5 +131,75 @@ namespace ChaosBot.Discord.Modules.Admin
                 Logger.Error($"{MethodBase.GetCurrentMethod().ReflectedType.FullName}: Exception [{ex}] thrown, <[{ex.Message}]>.");
             }
         }
+
+        [Command("role remove")]
+        [CheckCommandPerm("Admin")]
+        public async Task RoleRemoveCommand(params string[] parameters)
+        {
+            try
+            {
+                await using (ChaosbotContext dbContext = new ChaosbotContext())
+                {
+                    string parameterString = String.Join("", parameters);
+
+                    // Fetch last message
+                    IMessage message = (await Context.Channel.GetMessagesAsync(2).FlattenAsync()).Last();
+
+                    // Parse parameters
+                    string pattern = @"(<a?:\w+:\d+>|..)";
+                    string input = parameterString;
+
+                    foreach (Match m in Regex.Matches(input, pattern))
+                    {
+                        Logger.Info(m.Value);
+                        try
+                        {
+                            IEmote emote;
+                            string emoteString = m.Value;
+
+                            if (Emote.TryParse(emoteString, out Emote tempEmote))
+                            {
+                                if (tempEmote.Animated && Context.Client.CurrentUser.PremiumType != PremiumType.Nitro)
+                                    throw new NotSupportedException("No support for animated icons");
+
+                                if (Context.Guild.Emotes.All(e => e.Id != tempEmote.Id) &&
+                                    Context.Client.CurrentUser.PremiumType != PremiumType.Nitro)
+                                    throw new NotSupportedException($"No support for emotes from other servers");
+
+                                emote = tempEmote;
+                            }
+                            else
+                            {
+                                emote = new Emoji(emoteString);
+                            }
+
+                            // Delete DB entries
+                            IQueryable<RoleReaction> roleReactions = dbContext.RoleReactions;
+                            dbContext.RemoveRange(roleReactions
+                                .Where(r => r.DiscordGuildId == Context.Guild.Id)
+                                .ToList()
+                                .Where(r => r.DiscordEmoteName == emote.ToString())
+                                .Where(r => r.DiscordMessageId == message.Id)
+                                .ToList());
+
+                            // Remove reaction from message
+                            await message.RemoveReactionAsync(emote, Context.Client.CurrentUser);
+                        }
+                        catch (Exception ex)
+                        {
+                            await ReplyAsync($"Something went wrong trying to process {m.Value}: {ex.Message}");
+                            Logger.Error(
+                                $"{MethodBase.GetCurrentMethod().ReflectedType.FullName}: Exception [{ex}] thrown, <[{ex.Message}]>.");
+                        }
+                    }
+
+                    await dbContext.SaveChangesAsync();
+                }
+            }
+            catch (Exception ex)
+            {
+                Logger.Error($"{MethodBase.GetCurrentMethod().ReflectedType.FullName}: Exception [{ex}] thrown, <[{ex.Message}]>.");
+            }
+        }
     }
 }