Modified all background services

-Removed a number of diagnostic messages
-Removed ConnectionStatus, connection scores, etc.
-Modified work intervals for certain background tasks
-Updated code style

BackgroundServices/BackgroundService.cs

@@ -1,16 +1,14 @@
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace BirthdayBot.BackgroundServices
+namespace BirthdayBot.BackgroundServices;
-{
+
-    abstract class BackgroundService
+abstract class BackgroundService {
-    {
     protected ShardInstance ShardInstance { get; }
 
     public BackgroundService(ShardInstance instance) => ShardInstance = instance;
 
     protected void Log(string message) => ShardInstance.Log(GetType().Name, message);
 
-        public abstract Task OnTick(CancellationToken token);
+    public abstract Task OnTick(int tickCount, CancellationToken token);
-    }
 }

BackgroundServices/BirthdayRoleUpdate.cs

@@ -8,38 +8,32 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace BirthdayBot.BackgroundServices
+namespace BirthdayBot.BackgroundServices;
-{
+
-    /// <summary>
+/// <summary>
-    /// Core automatic functionality of the bot. Manages role memberships based on birthday information,
+/// Core automatic functionality of the bot. Manages role memberships based on birthday information,
-    /// and optionally sends the announcement message to appropriate guilds.
+/// and optionally sends the announcement message to appropriate guilds.
-    /// </summary>
+/// </summary>
-    class BirthdayRoleUpdate : BackgroundService
+class BirthdayRoleUpdate : BackgroundService {
-    {
     public BirthdayRoleUpdate(ShardInstance instance) : base(instance) { }
 
     /// <summary>
     /// Processes birthday updates for all available guilds synchronously.
     /// </summary>
-        public override async Task OnTick(CancellationToken token)
+    public override async Task OnTick(int tickCount, CancellationToken token) {
-        {
         var exs = new List<Exception>();
-            foreach (var guild in ShardInstance.DiscordClient.Guilds)
+        foreach (var guild in ShardInstance.DiscordClient.Guilds) {
-            {
+            if (ShardInstance.DiscordClient.ConnectionState != Discord.ConnectionState.Connected) {
-                if (ShardInstance.DiscordClient.ConnectionState != Discord.ConnectionState.Connected)
-                {
                 Log("Client is not connected. Stopping early.");
                 return;
             }
 
-                // Single guilds are fully processed and are not interrupted by task cancellation.
+            // Check task cancellation here. Processing during a single guild is never interrupted.
             if (token.IsCancellationRequested) throw new TaskCanceledException();
-                try
+
-                {
+            try {
                 await ProcessGuildAsync(guild).ConfigureAwait(false);
-                }
+            } catch (Exception ex) {
-                catch (Exception ex)
-                {
                 // Catch all exceptions per-guild but continue processing, throw at end.
                 exs.Add(ex);
             }
@@ -57,11 +51,11 @@ namespace BirthdayBot.BackgroundServices
     /// <summary>
     /// Main method where actual guild processing occurs.
     /// </summary>
-        private static async Task<PGDiagnostic> ProcessGuildAsync(SocketGuild guild)
+    private static async Task<PGDiagnostic> ProcessGuildAsync(SocketGuild guild) {
-        {
         var diag = new PGDiagnostic();
 
-            // Load guild information - stop if there is none (bot never previously used in guild)
+        // Load guild information - stop if local cache is unavailable.
+        if (!Common.HasMostMembersDownloaded(guild)) return diag;
         var gc = await GuildConfiguration.LoadAsync(guild.Id, true).ConfigureAwait(false);
         if (gc == null) return diag;
 
@@ -80,14 +74,11 @@ namespace BirthdayBot.BackgroundServices
 
         IEnumerable<SocketGuildUser> announcementList;
         // Update roles as appropriate
-            try
+        try {
-            {
             var updateResult = await UpdateGuildBirthdayRoles(guild, role, birthdays).ConfigureAwait(false);
             announcementList = updateResult.Item1;
             diag.RoleApplyResult = updateResult.Item2; // statistics
-            }
+        } catch (Discord.Net.HttpException ex) {
-            catch (Discord.Net.HttpException ex)
-            {
             diag.RoleApply = ex.Message;
             return diag;
         }
@@ -98,14 +89,11 @@ namespace BirthdayBot.BackgroundServices
         var announceping = gc.AnnouncePing;
         SocketTextChannel channel = null;
         if (gc.AnnounceChannelId.HasValue) channel = guild.GetTextChannel(gc.AnnounceChannelId.Value);
-            if (announcementList.Any())
+        if (announcementList.Any()) {
-            {
             var announceResult =
                 await AnnounceBirthdaysAsync(announce, announceping, channel, announcementList).ConfigureAwait(false);
             diag.Announcement = announceResult;
-            }
+        } else {
-            else
-            {
             diag.Announcement = "No new role additions. Announcement not needed.";
         }
 
@@ -115,19 +103,16 @@ namespace BirthdayBot.BackgroundServices
     /// <summary>
     /// Checks if the bot may be allowed to alter roles.
     /// </summary>
-        private static string CheckCorrectRoleSettings(SocketGuild guild, SocketRole role)
+    private static string CheckCorrectRoleSettings(SocketGuild guild, SocketRole role) {
-        {
+        if (role == null) return "Birthday role is not configured, or has gone missing.";
-            if (role == null) return "Designated role is not set, or target role cannot be found.";
 
-            if (!guild.CurrentUser.GuildPermissions.ManageRoles)
+        if (!guild.CurrentUser.GuildPermissions.ManageRoles) {
-            {
             return "Bot does not have the 'Manage Roles' permission.";
         }
 
         // Check potential role order conflict
-            if (role.Position >= guild.CurrentUser.Hierarchy)
+        if (role.Position >= guild.CurrentUser.Hierarchy) {
-            {
+            return "Can't access the birthday role. Is it above the bot's permissions?";
-                return "Bot is unable to access the designated role due to permission hierarchy.";
         }
 
         return null;
@@ -137,20 +122,17 @@ namespace BirthdayBot.BackgroundServices
     /// Gets all known users from the given guild and returns a list including only those who are
     /// currently experiencing a birthday in the respective time zone.
     /// </summary>
-        private static HashSet<ulong> GetGuildCurrentBirthdays(IEnumerable<GuildUserConfiguration> guildUsers, string defaultTzStr)
+    private static HashSet<ulong> GetGuildCurrentBirthdays(IEnumerable<GuildUserConfiguration> guildUsers, string defaultTzStr) {
-        {
         var birthdayUsers = new HashSet<ulong>();
 
         DateTimeZone defaultTz = null;
         if (defaultTzStr != null) defaultTz = DateTimeZoneProviders.Tzdb.GetZoneOrNull(defaultTzStr);
         defaultTz ??= DateTimeZoneProviders.Tzdb.GetZoneOrNull("UTC");
 
-            foreach (var item in guildUsers)
+        foreach (var item in guildUsers) {
-            {
             // Determine final time zone to use for calculation
             DateTimeZone tz = null;
-                if (item.TimeZone != null)
+            if (item.TimeZone != null) {
-                {
                 // Try user-provided time zone
                 tz = DateTimeZoneProviders.Tzdb.GetZoneOrNull(item.TimeZone);
             }
@@ -161,13 +143,11 @@ namespace BirthdayBot.BackgroundServices
 
             var checkNow = SystemClock.Instance.GetCurrentInstant().InZone(tz);
             // Special case: If birthday is February 29 and it's not a leap year, recognize it on March 1st
-                if (targetMonth == 2 && targetDay == 29 && !DateTime.IsLeapYear(checkNow.Year))
+            if (targetMonth == 2 && targetDay == 29 && !DateTime.IsLeapYear(checkNow.Year)) {
-                {
                 targetMonth = 3;
                 targetDay = 1;
             }
-                if (targetMonth == checkNow.Month && targetDay == checkNow.Day)
+            if (targetMonth == checkNow.Month && targetDay == checkNow.Day) {
-                {
                 birthdayUsers.Add(item.UserId);
             }
         }
@@ -183,27 +163,23 @@ namespace BirthdayBot.BackgroundServices
     /// Second item: Counts of users who have had roles added/removed, used for operation reporting.
     /// </returns>
     private static async Task<(IEnumerable<SocketGuildUser>, (int, int))> UpdateGuildBirthdayRoles(
-            SocketGuild g, SocketRole r, HashSet<ulong> names)
+        SocketGuild g, SocketRole r, HashSet<ulong> names) {
-        {
         // Check members currently with the role. Figure out which users to remove it from.
         var roleRemoves = new List<SocketGuildUser>();
         var roleKeeps = new HashSet<ulong>();
-            foreach (var member in r.Members)
+        foreach (var member in r.Members) {
-            {
             if (!names.Contains(member.Id)) roleRemoves.Add(member);
             else roleKeeps.Add(member.Id);
         }
 
         // TODO Can we remove during the iteration instead of after? investigate later...
-            foreach (var user in roleRemoves)
+        foreach (var user in roleRemoves) {
-            {
             await user.RemoveRoleAsync(r).ConfigureAwait(false);
         }
 
         // Apply role to members not already having it. Prepare announcement list.
         var newBirthdays = new List<SocketGuildUser>();
-            foreach (var target in names)
+        foreach (var target in names) {
-            {
             var member = g.GetUser(target);
             if (member == null) continue;
             if (roleKeeps.Contains(member.Id)) continue; // already has role - do nothing
@@ -223,9 +199,8 @@ namespace BirthdayBot.BackgroundServices
     /// </summary>
     /// <returns>The message to place into operation status log.</returns>
     private static async Task<string> AnnounceBirthdaysAsync(
-            (string, string) announce, bool announcePing, SocketTextChannel c, IEnumerable<SocketGuildUser> names)
+        (string, string) announce, bool announcePing, SocketTextChannel c, IEnumerable<SocketGuildUser> names) {
-        {
+        if (c == null) return "Announcement channel is not configured, or has gone missing.";
-            if (c == null) return "Announcement channel is not set, or previous announcement channel has been deleted.";
 
         string announceMsg;
         if (names.Count() == 1) announceMsg = announce.Item1 ?? announce.Item2 ?? DefaultAnnounce;
@@ -240,27 +215,22 @@ namespace BirthdayBot.BackgroundServices
         namestrings.Sort(StringComparer.OrdinalIgnoreCase);
 
         var namedisplay = new StringBuilder();
-            foreach (var item in namestrings)
+        foreach (var item in namestrings) {
-            {
             namedisplay.Append(", ");
             namedisplay.Append(item);
         }
         namedisplay.Remove(0, 2); // Remove initial comma and space
 
-            try
+        try {
-            {
             await c.SendMessageAsync(announceMsg.Replace("%n", namedisplay.ToString())).ConfigureAwait(false);
             return null;
-            }
+        } catch (Discord.Net.HttpException ex) {
-            catch (Discord.Net.HttpException ex)
-            {
             // Directly use the resulting exception message in the operation status log
             return ex.Message;
         }
     }
 
-        private class PGDiagnostic
+    private class PGDiagnostic {
-        {
         const string DefaultValue = "--";
 
         public string RoleCheck = DefaultValue;
@@ -269,8 +239,7 @@ namespace BirthdayBot.BackgroundServices
         public (int, int)? RoleApplyResult;
         public string Announcement = DefaultValue;
 
-            public string Export()
+        public string Export() {
-            {
             var result = new StringBuilder();
             result.AppendLine("Test result:");
             result.AppendLine("Check role permissions: " + (RoleCheck ?? ":white_check_mark:"));
@@ -284,5 +253,4 @@ namespace BirthdayBot.BackgroundServices
             return result.ToString();
         }
     }
-    }
 }

BackgroundServices/ConnectionStatus.cs

@@ -1,44 +0,0 @@
-using System.Threading;
-using System.Threading.Tasks;
-
-namespace BirthdayBot.BackgroundServices
-{
-    /// <summary>
-    /// Keeps track of the connection status, assigning a score based on either the connection's
-    /// longevity or the amount of time it has remained persistently disconnected.
-    /// </summary>
-    class ConnectionStatus : BackgroundService
-    {
-        // About 3 minutes
-        public const int StableScore = 180 / ShardBackgroundWorker.Interval;
-
-        public bool Stable { get { return Score >= StableScore; } }
-        public int Score { get; private set; }
-
-        public ConnectionStatus(ShardInstance instance) : base(instance) { }
-
-        public override Task OnTick(CancellationToken token)
-        {
-            switch (ShardInstance.DiscordClient.ConnectionState)
-            {
-                case Discord.ConnectionState.Connected:
-                    if (Score < 0) Score = 0;
-                    Score++;
-                    break;
-                default:
-                    if (Score > 0) Score = 0;
-                    Score--;
-                    break;
-            }
-            return Task.CompletedTask;
-        }
-
-        /// <summary>
-        /// In response to a disconnection event, will immediately reset a positive score to zero.
-        /// </summary>
-        public void Disconnected()
-        {
-            if (Score > 0) Score = 0;
-        }
-    }
-}

BackgroundServices/DataRetention.cs

@@ -7,47 +7,35 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace BirthdayBot.BackgroundServices
+namespace BirthdayBot.BackgroundServices;
-{
+
-    /// <summary>
+/// <summary>
-    /// Data retention adherence service:
+/// Automatically removes database information for guilds that have not been accessed in a long time.
-    /// Automatically removes database information for guilds that have not been accessed in a long time.
+/// </summary>
-    /// </summary>
+class DataRetention : BackgroundService {
-    class DataRetention : BackgroundService
-    {
     private static readonly SemaphoreSlim _updateLock = new(ShardManager.MaxConcurrentOperations);
     const int ProcessInterval = 3600 / ShardBackgroundWorker.Interval; // Process about once per hour
-        private int _tickCount = -1;
+    const int Stagger = 3; // How many ticks in between each group of guilds to stagger processing.
 
     public DataRetention(ShardInstance instance) : base(instance) { }
 
-        public override async Task OnTick(CancellationToken token)
+    public override async Task OnTick(int tickCount, CancellationToken token) {
-        {
+        // On each tick, run only a set group of guilds, each group still processed every ProcessInterval ticks.
-            if ((++_tickCount + ShardInstance.ShardId * 3) % ProcessInterval != 0)
+        if ((tickCount + ShardInstance.ShardId * Stagger) % ProcessInterval != 0) return;
-            {
-                // Do not process on every tick.
-                // Stagger processing based on shard ID, to not choke the background processing task.
-                return;
-            }
 
-            try
+        try {
-            {
             // A semaphore is used to restrict this work being done concurrently on other shards
             // to avoid putting pressure on the SQL connection pool. Clearing old database information
             // ultimately is a low priority among other tasks.
             await _updateLock.WaitAsync(token).ConfigureAwait(false);
-            }
+        } catch (Exception ex) when (ex is OperationCanceledException or ObjectDisposedException) {
-            catch (Exception ex) when (ex is OperationCanceledException or ObjectDisposedException)
+            // Caller does not expect the exception that SemaphoreSlim throws...
-            {
-                // Calling thread does not expect the exception that SemaphoreSlim throws...
             throw new TaskCanceledException();
         }
-            try
+        try {
-            {
             // Build a list of all values to update
             var updateList = new Dictionary<ulong, List<ulong>>();
-                foreach (var g in ShardInstance.DiscordClient.Guilds)
+            foreach (var g in ShardInstance.DiscordClient.Guilds) {
-                {
                 // Get list of IDs for all users who exist in the database and currently exist in the guild
                 var userList = GuildUserConfiguration.LoadAllAsync(g.Id);
                 var guildUserIds = from gu in g.Users select gu.Id;
@@ -76,8 +64,7 @@ namespace BirthdayBot.BackgroundServices
             // Do actual updates
             int updatedGuilds = 0;
             int updatedUsers = 0;
-                foreach (var item in updateList)
+            foreach (var item in updateList) {
-                {
                 var guild = item.Key;
                 var userlist = item.Value;
 
@@ -85,8 +72,7 @@ namespace BirthdayBot.BackgroundServices
                 updatedGuilds += await cUpdateGuild.ExecuteNonQueryAsync(CancellationToken.None).ConfigureAwait(false);
 
                 pUpdateGU_g.Value = (long)guild;
-                    foreach (var userid in userlist)
+                foreach (var userid in userlist) {
-                    {
                     pUpdateGU_u.Value = (long)userid;
                     updatedUsers += await cUpdateGuildUser.ExecuteNonQueryAsync(CancellationToken.None).ConfigureAwait(false);
                 }
@@ -97,39 +83,31 @@ namespace BirthdayBot.BackgroundServices
             // Delete all old values - expects referencing tables to have 'on delete cascade'
             using var t = db.BeginTransaction();
             int staleGuilds, staleUsers;
-                using (var c = db.CreateCommand())
+            using (var c = db.CreateCommand()) {
-                {
                 // Delete data for guilds not seen in 4 weeks
                 c.CommandText = $"delete from {GuildConfiguration.BackingTable} where (now() - interval '28 days') > last_seen";
                 staleGuilds = await c.ExecuteNonQueryAsync(CancellationToken.None).ConfigureAwait(false);
             }
-                using (var c = db.CreateCommand())
+            using (var c = db.CreateCommand()) {
-                {
                 // Delete data for users not seen in 8 weeks
                 c.CommandText = $"delete from {GuildUserConfiguration.BackingTable} where (now() - interval '56 days') > last_seen";
                 staleUsers = await c.ExecuteNonQueryAsync(CancellationToken.None).ConfigureAwait(false);
             }
-                if (staleGuilds != 0 || staleUsers != 0)
+            if (staleGuilds != 0 || staleUsers != 0) {
-                {
                 resultText.Append(" Discarded ");
-                    if (staleGuilds != 0)
+                if (staleGuilds != 0) {
-                    {
                     resultText.Append($"{staleGuilds} guilds");
                     if (staleUsers != 0) resultText.Append(", ");
                 }
-                    if (staleUsers != 0) 
+                if (staleUsers != 0) {
-                    {
                     resultText.Append($"{staleUsers} standalone users");
                 }
                 resultText.Append('.');
             }
             t.Commit();
             Log(resultText.ToString());
-            }
+        } finally {
-            finally
-            {
             _updateLock.Release();
         }
     }
-    }
 }

BackgroundServices/ExternalStatisticsReporting.cs

@@ -4,55 +4,47 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace BirthdayBot.BackgroundServices
+namespace BirthdayBot.BackgroundServices;
-{
+
-    /// <summary>
+/// <summary>
-    /// Reports user count statistics to external services on a shard by shard basis.
+/// Reports user count statistics to external services on a shard by shard basis.
-    /// </summary>
+/// </summary>
-    class ExternalStatisticsReporting : BackgroundService
+class ExternalStatisticsReporting : BackgroundService {
-    {
+    const int ProcessInterval = 1200 / ShardBackgroundWorker.Interval; // Process every ~20 minutes
-        const int ProcessInterval = 600 / ShardBackgroundWorker.Interval; // Process every ~5 minutes
+    const int ProcessOffset = 300 / ShardBackgroundWorker.Interval; // Begin processing 5 minutes after shard start
-        private int _tickCount = 0;
 
     private static readonly HttpClient _httpClient = new();
 
     public ExternalStatisticsReporting(ShardInstance instance) : base(instance) { }
 
-        public override async Task OnTick(CancellationToken token)
+    public override async Task OnTick(int tickCount, CancellationToken token) {
-        {
+        if (tickCount < ProcessOffset) return;
-            if (++_tickCount % ProcessInterval != 0) return;
+        if (tickCount % ProcessInterval != 0) return;
 
         var botId = ShardInstance.DiscordClient.CurrentUser.Id;
         if (botId == 0) return;
+        var count = ShardInstance.DiscordClient.Guilds.Count;
 
-            await SendDiscordBots(ShardInstance.DiscordClient.Guilds.Count, botId, token);
+        var dbotsToken = ShardInstance.Config.DBotsToken;
+        if (dbotsToken != null) await SendDiscordBots(dbotsToken, count, botId, token);
     }
 
-        private async Task SendDiscordBots(int userCount, ulong botId, CancellationToken token)
+    private async Task SendDiscordBots(string apiToken, int userCount, ulong botId, CancellationToken token) {
-        {
+        try {
-            var dbotsToken = ShardInstance.Config.DBotsToken;
-            if (dbotsToken != null)
-            {
-                try
-                {
             const string dBotsApiUrl = "https://discord.bots.gg/api/v1/bots/{0}/stats";
             const string Body = "{{ \"guildCount\": {0}, \"shardCount\": {1}, \"shardId\": {2} }}";
             var uri = new Uri(string.Format(dBotsApiUrl, botId));
 
             var post = new HttpRequestMessage(HttpMethod.Post, uri);
-                    post.Headers.Add("Authorization", dbotsToken);
+            post.Headers.Add("Authorization", apiToken);
             post.Content = new StringContent(string.Format(Body,
                 userCount, ShardInstance.Config.ShardTotal, ShardInstance.ShardId),
                 Encoding.UTF8, "application/json");
 
             await _httpClient.SendAsync(post, token);
             Log("Discord Bots: Update successful.");
-                }
+        } catch (Exception ex) {
-                catch (Exception ex)
-                {
             Log("Discord Bots: Exception encountered during update: " + ex.Message);
         }
     }
-        }
-    }
 }

BackgroundServices/SelectiveAutoUserDownload.cs

@@ -18,7 +18,7 @@ class SelectiveAutoUserDownload : BackgroundService {
 
     public SelectiveAutoUserDownload(ShardInstance instance) : base(instance) { }
 
-    public override async Task OnTick(CancellationToken token) {
+    public override async Task OnTick(int tickCount, CancellationToken token) {
         IEnumerable<ulong> requests;
         lock (_fetchRequests) {
             requests = _fetchRequests.ToArray();
@@ -26,10 +26,8 @@ class SelectiveAutoUserDownload : BackgroundService {
         }
 
         foreach (var guild in ShardInstance.DiscordClient.Guilds) {
-            if (ShardInstance.DiscordClient.ConnectionState != ConnectionState.Connected) {
+            // Has the potential to disconnect while in the middle of processing.
-                Log("Client no longer connected. Stopping early.");
+            if (ShardInstance.DiscordClient.ConnectionState != ConnectionState.Connected) return;
-                return;
-            }
 
             // Determine if there is action to be taken...
             if (guild.HasAllMembers) continue;

BackgroundServices/ShardBackgroundWorker.cs

@@ -18,22 +18,20 @@ namespace BirthdayBot.BackgroundServices
         private readonly Task _workerTask;
         private readonly CancellationTokenSource _workerCanceller;
         private readonly List<BackgroundService> _workers;
+        private int _tickCount = -1;
 
         private ShardInstance Instance { get; }
 
-        public ConnectionStatus ConnStatus { get; }
         public BirthdayRoleUpdate BirthdayUpdater { get; }
         public SelectiveAutoUserDownload UserDownloader { get; }
         public DateTimeOffset LastBackgroundRun { get; private set; }
-        public string CurrentExecutingService { get; private set; }
+        public string? CurrentExecutingService { get; private set; }
-        public int ConnectionScore => ConnStatus.Score;
 
         public ShardBackgroundWorker(ShardInstance instance)
         {
             Instance = instance;
             _workerCanceller = new CancellationTokenSource();
 
-            ConnStatus = new ConnectionStatus(instance);
             BirthdayUpdater = new BirthdayRoleUpdate(instance);
             UserDownloader = new SelectiveAutoUserDownload(instance);
             _workers = new List<BackgroundService>()
@@ -70,9 +68,8 @@ namespace BirthdayBot.BackgroundServices
                 {
                     await Task.Delay(Interval * 1000, _workerCanceller.Token).ConfigureAwait(false);
 
-                    // ConnectionStatus will always run. Its result determines if remaining tasks also this time.
+                    // Skip this round of task execution if the client is not connected
-                    await ConnStatus.OnTick(_workerCanceller.Token).ConfigureAwait(false);
+                    if (Instance.DiscordClient.ConnectionState != Discord.ConnectionState.Connected) continue;
-                    if (!ConnStatus.Stable) continue;
 
                     // Execute tasks sequentially
                     foreach (var service in _workers)
@@ -81,30 +78,20 @@ namespace BirthdayBot.BackgroundServices
                         try
                         {
                             if (_workerCanceller.IsCancellationRequested) break;
-                            await service.OnTick(_workerCanceller.Token).ConfigureAwait(false);
+                            _tickCount++;
+                            await service.OnTick(_tickCount, _workerCanceller.Token).ConfigureAwait(false);
                         }
-                        catch (Exception ex)
+                        catch (Exception ex) when (ex is not TaskCanceledException)
-                        {
-                            
-                            if (ex is TaskCanceledException)
-                            {
-                                Instance.Log(nameof(WorkerLoop), $"{CurrentExecutingService} was interrupted by a cancellation request.");
-                                throw;
-                            }
-                            else
                         {
                             // TODO webhook log
                             Instance.Log(nameof(WorkerLoop), $"{CurrentExecutingService} encountered an exception:\n" + ex.ToString());
                         }
                     }
-                    }
                     CurrentExecutingService = null;
                     LastBackgroundRun = DateTimeOffset.UtcNow;
                 }
             }
             catch (TaskCanceledException) { }
-
-            Instance.Log(nameof(WorkerLoop), "Background worker has concluded normally.");
         }
     }
 }

Configuration.cs

@@ -6,16 +6,15 @@ using System.IO;
 using System.Reflection;
 using System.Text.RegularExpressions;
 
-namespace BirthdayBot
+namespace BirthdayBot;
-{
+
-    /// <summary>
+/// <summary>
-    /// Loads and holds configuration values.
+/// Loads and holds configuration values.
-    /// </summary>
+/// </summary>
-    class Configuration
+class Configuration {
-    {
     public string BotToken { get; }
     public string LogWebhook { get; }
-        public string DBotsToken { get; }
+    public string? DBotsToken { get; }
 
     public const string ShardLenConfKey = "ShardRange";
     public int ShardStart { get; }
@@ -25,14 +24,12 @@ namespace BirthdayBot
 
     public bool QuitOnFails { get; }
 
-        public Configuration()
+    public Configuration() {
-        {
         // Looks for settings.json in the executable directory.
         var confPath = Path.GetDirectoryName(Assembly.GetExecutingAssembly().Location);
         confPath += Path.DirectorySeparatorChar + "settings.json";
 
-            if (!File.Exists(confPath))
+        if (!File.Exists(confPath)) {
-            {
             throw new Exception("Settings file not found."
                 + " Create a file in the executable directory named 'settings.json'.");
         }
@@ -48,12 +45,9 @@ namespace BirthdayBot
             throw new Exception($"'{nameof(LogWebhook)}' must be specified.");
 
         var dbj = jc[nameof(DBotsToken)];
-            if (dbj != null)
+        if (dbj != null) {
-            {
             DBotsToken = dbj.Value<string>();
-            }
+        } else {
-            else
-            {
             DBotsToken = null;
         }
 
@@ -62,8 +56,7 @@ namespace BirthdayBot
         var sqlpass = jc["SqlPassword"]?.Value<string>();
         if (string.IsNullOrWhiteSpace(sqluser) || string.IsNullOrWhiteSpace(sqlpass))
             throw new Exception("'SqlUsername', 'SqlPassword' must be specified.");
-            var csb = new NpgsqlConnectionStringBuilder()
+        var csb = new NpgsqlConnectionStringBuilder() {
-            {
             Host = sqlhost,
             Username = sqluser,
             Password = sqlpass
@@ -74,33 +67,25 @@ namespace BirthdayBot
 
         int? sc = jc[nameof(ShardTotal)]?.Value<int>();
         if (!sc.HasValue) ShardTotal = 1;
-            else
+        else {
-            {
             ShardTotal = sc.Value;
-                if (ShardTotal <= 0)
+            if (ShardTotal <= 0) {
-                {
                 throw new Exception($"'{nameof(ShardTotal)}' must be a positive integer.");
             }
         }
 
         string srVal = jc[ShardLenConfKey]?.Value<string>();
-            if (!string.IsNullOrWhiteSpace(srVal))
+        if (!string.IsNullOrWhiteSpace(srVal)) {
-            {
             Regex srPicker = new(@"(?<low>\d{1,2})[-,]{1}(?<high>\d{1,2})");
             var m = srPicker.Match(srVal);
-                if (m.Success)
+            if (m.Success) {
-                {
                 ShardStart = int.Parse(m.Groups["low"].Value);
                 int high = int.Parse(m.Groups["high"].Value);
                 ShardAmount = high - (ShardStart - 1);
-                }
+            } else {
-                else
-                {
                 throw new Exception($"Shard range not properly formatted in '{ShardLenConfKey}'.");
             }
-            }
+        } else {
-            else
-            {
             // Default: this instance handles all shards from ShardTotal
             ShardStart = 0;
             ShardAmount = ShardTotal;
@@ -108,5 +93,4 @@ namespace BirthdayBot
 
         QuitOnFails = jc[nameof(QuitOnFails)]?.Value<bool>() ?? false;
     }
-    }
 }

ShardInstance.cs

@@ -30,11 +30,6 @@ namespace BirthdayBot
         /// </summary>
         public string CurrentExecutingService => _background.CurrentExecutingService;
         public Configuration Config => _manager.Config;
-        /// <summary>
-        /// Returns this shard's connection score.
-        /// See <see cref="BackgroundServices.ConnectionStatus"/> for details on what this means.
-        /// </summary>
-        public int ConnectionScore => _background.ConnectionScore;
 
         /// <summary>
         /// Prepares and configures the shard instances, but does not yet start its connection.
@@ -51,7 +46,6 @@ namespace BirthdayBot
 
             // Background task constructor begins background processing immediately.
             _background = new ShardBackgroundWorker(this);
-            DiscordClient.Disconnected += Client_Disconnected;
         }
         
         /// <summary>
@@ -69,13 +63,10 @@ namespace BirthdayBot
         /// </summary>
         public void Dispose()
         {
-            Log("Instance", "Cleaning up...");
-
             // Unsubscribe from own events
             DiscordClient.Log -= Client_Log;
             DiscordClient.Ready -= Client_Ready;
             DiscordClient.MessageReceived -= Client_MessageReceived;
-            DiscordClient.Disconnected -= Client_Disconnected;
 
             _background.Dispose();
             try
@@ -98,9 +89,8 @@ namespace BirthdayBot
             }
 
             var clientDispose = Task.Run(DiscordClient.Dispose);
-            if (!clientDispose.Wait(10000))
+            if (!clientDispose.Wait(10000)) Log("Instance", "Warning: Client is hanging on dispose. Will continue.");
-                Log("Instance", "Warning: Client hanging on dispose.");
+            else Log("Instance", "Shard instance disposed.");
-            Log("Instance", "Shard instance disposed.");
         }
 
         public void Log(string source, string message) => Program.Log($"Shard {ShardId:00}] [{source}", message);
@@ -130,6 +120,7 @@ namespace BirthdayBot
                     case "Disconnecting":
                     case "Disconnected":
                     case "WebSocket connection was closed":
+                    case "Server requested a reconnect":
                         return Task.CompletedTask;
                 }
                 if (arg.Message == "Heartbeat Errored")
@@ -152,15 +143,6 @@ namespace BirthdayBot
         /// </summary>
         private async Task Client_Ready() => await DiscordClient.SetGameAsync(CommandPrefix + "help");
 
-        /// <summary>
-        /// Notify ConnectionStatus of a disconnect.
-        /// </summary>
-        private Task Client_Disconnected(Exception arg)
-        {
-            _background.ConnStatus.Disconnected();
-            return Task.CompletedTask;
-        }
-
         /// <summary>
         /// Determines if the incoming message is an incoming command, and dispatches to the appropriate handler if necessary.
         /// </summary>

ShardManager.cs

@@ -150,7 +150,7 @@ namespace BirthdayBot
                     Log($"Bot uptime: {Common.BotUptime}");
 
                     // Iterate through shard list, extract data
-                    var guildInfo = new Dictionary<int, (int, int, TimeSpan, string)>();
+                    var guildInfo = new Dictionary<int, (int, TimeSpan, string)>();
                     var now = DateTimeOffset.UtcNow;
                     var nullShards = new List<int>();
                     foreach (var item in _shards)
@@ -163,11 +163,10 @@ namespace BirthdayBot
                         var shard = item.Value;
 
                         var guildCount = shard.DiscordClient.Guilds.Count;
-                        var connScore = shard.ConnectionScore;
                         var lastRun = now - shard.LastBackgroundRun;
                         var lastExec = shard.CurrentExecutingService ?? "null";
 
-                        guildInfo[item.Key] = (guildCount, connScore, lastRun, lastExec);
+                        guildInfo[item.Key] = (guildCount, lastRun, lastExec);
                     }
 
                     // Process info
@@ -182,10 +181,9 @@ namespace BirthdayBot
                     var deadShards = new List<int>(); // shards to destroy and reinitialize
                     foreach (var item in guildInfo)
                     {
-                        var connScore = item.Value.Item2;
+                        var lastRun = item.Value.Item2;
-                        var lastRun = item.Value.Item3;
 
-                        if (lastRun > new TimeSpan(0, 10, 0) || connScore < ConnectionStatus.StableScore)
+                        if (lastRun > DeadShardThreshold / 3)
                         {
                             badShards.Add(item.Key);
 
@@ -208,9 +206,8 @@ namespace BirthdayBot
                             if (detailedInfo)
                             {
                                 result.Remove(result.Length - 1, 1);
-                                result.Append($"[{guildInfo[item].Item2:+0;-0}");
+                                result.Append($"[{Math.Floor(guildInfo[item].Item2.TotalSeconds):000}s");
-                                result.Append($" {Math.Floor(guildInfo[item].Item3.TotalSeconds):000}s");
+                                result.Append($" {guildInfo[item].Item3}] ");
-                                result.Append($" {guildInfo[item].Item4}] ");
                             }
                         }
                         if (result.Length > 0) result.Remove(result.Length - 1, 1);