Merge pull request #17 from Bubuni-Team/refactor/code-watcher

[code-watcher] Refactorings

modules/CodeWatcher/CodeWatcher.cs

@@ -1,9 +1,17 @@
-using Kruzya.TelegramBot.Core;
+using System.Collections.Concurrent;
+using Kruzya.TelegramBot.Core;
+using Microsoft.Extensions.DependencyInjection;
 
 namespace West.TelegramBot.CodeWatcher
 {
     public class CodeWatcher : Module
     {
         public CodeWatcher(Core core) : base(core) {}
+
+        public override void ConfigureServices(IServiceCollection services)
+        {
+            services.AddSingleton<ConcurrentBag<DeleteRequest>>();
+            services.AddHostedService<DeleteService>();
+        }
     }
 }

modules/CodeWatcher/DeleteRequest.cs

@@ -0,0 +1,10 @@
+using Telegram.Bot.Types;
+
+namespace West.TelegramBot.CodeWatcher;
+
+public class DeleteRequest
+{
+    public ChatId ChatId { get; set; }
+    public int MessageId { get; set; }
+    public DateTime DeleteAt { get; set; }
+}

modules/CodeWatcher/DeleteService.cs

@@ -0,0 +1,59 @@
+using System.Collections.Concurrent;
+using BotFramework.Abstractions;
+using Kruzya.TelegramBot.Core.Service;
+using Microsoft.Extensions.Logging;
+using Telegram.Bot;
+using Telegram.Bot.Exceptions;
+
+namespace West.TelegramBot.CodeWatcher;
+
+public class DeleteService : AbstractTimedHostedService
+{
+    private readonly ConcurrentBag<DeleteRequest> _deleteRequests;
+    protected override TimeSpan TimerPeriod => TimeSpan.FromSeconds(10);
+
+    public DeleteService(ILogger<DeleteService> logger, IBotInstance bot, ConcurrentBag<DeleteRequest> deleteRequests) : base(logger,
+        bot)
+    {
+        _deleteRequests = deleteRequests;
+    }
+
+    protected override async Task OnRun()
+    {
+        var now = DateTime.Now;
+        var skippedRequestList = new List<DeleteRequest>();
+
+        _logger.LogDebug("Spinning up the delete requests loop. Request count: {RequestCount}", _deleteRequests.Count);
+        for (var i = 0; i < _deleteRequests.Count; i++)
+        {
+            if (!_deleteRequests.TryTake(out var request))
+            {
+                _logger.LogDebug("Nothing to take, breaking...");
+                break;
+            }
+
+            if (request.DeleteAt < now)
+            {
+                try
+                {
+                    await _bot.BotClient.DeleteMessageAsync(request.ChatId, request.MessageId);
+                }
+                catch (ApiRequestException e)
+                {
+                    _logger.LogError("Error deleting message, code - {ErrorCode}, msg - {ErrorMessage}", e.ErrorCode,
+                        e.Message);
+                }
+            }
+            else
+            {
+                _logger.LogDebug("Skipping {MessageId}", request.MessageId);
+                skippedRequestList.Add(request);
+            }
+        }
+
+        foreach (var request in skippedRequestList)
+        {
+            _deleteRequests.Add(request);
+        }
+    }
+}

modules/CodeWatcher/Handler.cs

@@ -1,4 +1,5 @@
-using BotFramework;
+using System.Collections.Concurrent;
+using BotFramework;
 using BotFramework.Attributes;
 using BotFramework.Enums;
 using Kruzya.TelegramBot.Core.Extensions;
@@ -10,12 +11,19 @@ namespace West.TelegramBot.CodeWatcher;
 
 public class Handler : BotEventHandler
 {
-    [Message(InChat.Public, MessageFlag.HasText)]
+    private readonly ConcurrentBag<DeleteRequest> _requests;
+
+    public Handler(ConcurrentBag<DeleteRequest> requests)
+    {
+        _requests = requests;
+    }
+
+    [Update(InChat.Public, UpdateFlag.Message | UpdateFlag.EditedMessage)]
     public async Task HandleMessage()
     {
-        var message = RawUpdate.Message!;
+        var message = RawUpdate.Message ?? RawUpdate.EditedMessage;
 
-        if (message.Entities == null)
+        if (message?.Entities == null)
         {
             return;
         }
@@ -34,6 +42,11 @@ public class Handler : BotEventHandler
                     .SplitToLines()
                     .ToList();
 
+                if (entityLines.Count < 2)
+                {
+                    continue;
+                }
+
                 if (entityLines.Count >= 20 || entityLines.Any(line => line.Length > 160))
                 {
                     await DeleteAndNotifyAsync(message);
@@ -51,7 +64,12 @@ public class Handler : BotEventHandler
             "Вместо этого загрузите его на https://pastebin.com и отправьте в виде ссылки.", 
             ParseMode.Html);
 
-        await Task.Delay(TimeSpan.FromMinutes(1));
-        await Bot.DeleteMessageAsync(Chat.Id, notifyMsg.MessageId);
+        // TODO: maybe write a wrapper-service around collection to avoid direct interactions with the collection, West, 07.07.2022, 16:53
+        _requests.Add(new DeleteRequest
+        {
+            ChatId = notifyMsg.Chat.Id,
+            MessageId = notifyMsg.MessageId,
+            DeleteAt = DateTime.Now.AddSeconds(30)
+        });
     }
 }