Added .autopublish command

src/NadekoBot/Modules/Administration/Administration.cs

@@ -33,9 +33,13 @@ public partial class Administration : NadekoModule<AdministrationService>
     }
 
     private readonly SomethingOnlyChannelService _somethingOnly;
+    private readonly AutoPublishService _autoPubService;
 
-    public Administration(SomethingOnlyChannelService somethingOnly)
-        => _somethingOnly = somethingOnly;
+    public Administration(SomethingOnlyChannelService somethingOnly, AutoPublishService autoPubService)
+    {
+        _somethingOnly = somethingOnly;
+        _autoPubService = autoPubService;
+    }
 
     [Cmd]
     [RequireContext(ContextType.Guild)]
@@ -376,4 +380,26 @@ public partial class Administration : NadekoModule<AdministrationService>
         await t.DeleteAsync();
         await ctx.OkAsync();
     }
+
+    [Cmd]
+    [UserPerm(ChannelPerm.ManageMessages)]
+    public async Task AutoPublish()
+    {
+        if (ctx.Channel.GetChannelType() != ChannelType.News)
+        {
+            await ReplyErrorLocalizedAsync(strs.req_announcement_channel);
+            return;
+        }
+
+        var newState = await _autoPubService.ToggleAutoPublish(ctx.Guild.Id, ctx.Channel.Id);
+
+        if (newState)
+        {
+            await ReplyConfirmLocalizedAsync(strs.autopublish_enable);
+        }
+        else
+        {
+            await ReplyConfirmLocalizedAsync(strs.autopublish_disable);
+        }
+    }
 }

src/NadekoBot/Modules/Administration/AdministrationService.cs

@@ -1,6 +1,5 @@
 #nullable disable
 using Microsoft.EntityFrameworkCore;
-using Nadeko.Common;
 using NadekoBot.Db;
 using NadekoBot.Services.Database.Models;
 

src/NadekoBot/Modules/Administration/AutoPublishService.cs

@@ -0,0 +1,87 @@
+#nullable disable
+using LinqToDB;
+using LinqToDB.EntityFrameworkCore;
+using NadekoBot.Common.ModuleBehaviors;
+using NadekoBot.Db.Models;
+
+namespace NadekoBot.Modules.Administration.Services;
+
+public class AutoPublishService : IExecNoCommand, IReadyExecutor, INService
+{
+    private readonly DbService _db;
+    private readonly DiscordSocketClient _client;
+    private readonly IBotCredsProvider _creds;
+    private ConcurrentDictionary<ulong, ulong> _enabled;
+
+    public AutoPublishService(DbService db, DiscordSocketClient client, IBotCredsProvider creds)
+    {
+        _db = db;
+        _client = client;
+        _creds = creds;
+    } 
+    
+    public async Task ExecOnNoCommandAsync(IGuild guild, IUserMessage msg)
+    {
+        if (guild is null)
+            return;
+        
+        if (msg.Channel.GetChannelType() != ChannelType.News)
+            return;
+
+        if (!_enabled.TryGetValue(guild.Id, out var cid) || cid != msg.Channel.Id)
+            return;
+        
+        await msg.CrosspostAsync(new RequestOptions()
+        {
+            RetryMode = RetryMode.AlwaysFail
+        });
+    }
+
+    public async Task OnReadyAsync()
+    {
+        var creds = _creds.GetCreds();
+        
+        await using var ctx = _db.GetDbContext();
+        var items = await ctx.GetTable<AutoPublishChannel>()
+            .Where(x => Linq2DbExpressions.GuildOnShard(x.GuildId, creds.TotalShards, _client.ShardId))
+            .ToListAsyncLinqToDB();
+
+        _enabled = items
+            .ToDictionary(x => x.GuildId, x => x.ChannelId)
+            .ToConcurrent();
+    }
+    
+    public async Task<bool> ToggleAutoPublish(ulong guildId, ulong channelId)
+    {
+        await using var ctx = _db.GetDbContext();
+        var deleted = await ctx.GetTable<AutoPublishChannel>()
+            .DeleteAsync(x => x.GuildId == guildId && x.ChannelId == channelId);
+
+        if (deleted != 0)
+        {
+            _enabled.TryRemove(guildId, out _);
+            return false;
+        }
+
+        await ctx.GetTable<AutoPublishChannel>()
+            .InsertOrUpdateAsync(() => new()
+                {
+                    GuildId = guildId,
+                    ChannelId = channelId,
+                    DateAdded = DateTime.UtcNow,
+                },
+                old => new()
+                {
+                    ChannelId = channelId,
+                    DateAdded = DateTime.UtcNow,
+                },
+                () => new()
+                {
+                    GuildId = guildId
+                });
+        
+        _enabled[guildId] = channelId;
+
+        return true;
+    }
+}