feat: enhance official guild list management and reloading

- Rename the method `WriteOfficialListFile` to `WriteAndReloadOfficialListFile`
- Add a private key for reloading the official guild list
- Subscription to a Redis channel is added to reload the official guild list when triggered
- Improve error handling for loading and writing the official guild list

Signed-off-by: 孤之界 <f20001012@Gmail.com>

Author: konnokai

Discord Stream Notify Bot/Command/Admin/AdministraitonService.cs

@@ -2,11 +2,24 @@
 {
     public class AdministrationService : ICommandService
     {
+        private string _reloadOfficialGuildListKey = "DiscordStreamBot:Admin:ReloadOfficialGuildList";
         private readonly DiscordSocketClient _Client;
 
         public AdministrationService(DiscordSocketClient client)
         {
             _Client = client;
+
+            Bot.RedisSub.Subscribe(new RedisChannel(_reloadOfficialGuildListKey, RedisChannel.PatternMode.Literal), (_, _) =>
+            {
+                try
+                {
+                    Utility.OfficialGuildList = JsonConvert.DeserializeObject<HashSet<ulong>>(File.ReadAllText(Utility.GetDataFilePath("OfficialList.json")));
+                }
+                catch (Exception ex)
+                {
+                    Log.Error(ex.Demystify(), "ReloadOfficialGuildList Error");
+                }
+            });
         }
 
         public async Task ClearUser(ITextChannel textChannel)
@@ -17,11 +30,12 @@ public async Task ClearUser(ITextChannel textChannel)
             await Task.WhenAll(Task.Delay(1000), textChannel.DeleteMessagesAsync(msgs)).ConfigureAwait(false);
         }
 
-        internal bool WriteOfficialListFile()
+        internal bool WriteAndReloadOfficialListFile()
         {
             try
             {
                 File.WriteAllText(Utility.GetDataFilePath("OfficialList.json"), JsonConvert.SerializeObject(Utility.OfficialGuildList));
+                Bot.RedisSub.Publish(new RedisChannel(_reloadOfficialGuildListKey, RedisChannel.PatternMode.Literal), "");
             }
             catch (Exception ex)
             {

Discord Stream Notify Bot/Command/Admin/Administration.cs

@@ -405,7 +405,7 @@ public async Task AddOfficialListAsync(ulong guildId)
 
             Utility.OfficialGuildList.Add(guildId);
 
-            if (_service.WriteOfficialListFile())
+            if (_service.WriteAndReloadOfficialListFile())
             {
                 await Context.Channel.SendConfirmAsync($"已添加 {guildId} 至官方伺服器名單內");
             }
@@ -430,7 +430,7 @@ public async Task RemoveOfficialListAsync(ulong guildId)
 
             Utility.OfficialGuildList.Remove(guildId);
 
-            if (_service.WriteOfficialListFile())
+            if (_service.WriteAndReloadOfficialListFile())
             {
                 await Context.Channel.SendConfirmAsync($"已從官方伺服器名單內移除 {guildId}");
             }