refactor(di): migrate services layer to ILogger<T> (DI-4 Slice A)

MessageStore, MessageEnumerator, MessageManager, AutoTellTabsService
move from Plugin.LogProxy / IPluginLogProxy onto
Microsoft.Extensions.Logging.ILogger<T> via constructor injection.

MessageStore additionally takes ILoggerFactory so it can build a
per-instance ILogger<MessageEnumerator> at each of the five reader-
spawning sites; the enumerator is not a container singleton.

PluginHostFactory's MessageManager and AutoTellTabsService factory
lambdas grow to resolve the new logger args; everything else stays in
place.

Site-level migration in the four files:
- MessageStore: 12 calls, _logger field IPluginLogProxy -> ILogger<MessageStore>
- MessageManager: 7 Plugin.LogProxy.* sites, new _logger field
- AutoTellTabsService: 9 Plugin.LogProxy.* sites, new _logger field

Plus a pre-existing template bug surfaced by CA2017: a LogDebug call
in AutoTellTabsService used "{tab.Name}" with no `$` prefix, which
landed in xllog as literal text under Plugin.LogProxy; ILogger now
reads that as a structured placeholder, so the call was promoted to
proper structured logging with tab.Name passed as a parameter.

HellionChat/AutoTellTabsService.cs

@@ -9,6 +9,7 @@ using HellionChat.Code;
 using HellionChat.GameFunctions.Types;
 using HellionChat.Resources;
 using HellionChat.Util;
+using Microsoft.Extensions.Logging;
 
 namespace HellionChat;
 
@@ -19,6 +20,7 @@ internal sealed class AutoTellTabsService : IDisposable
     private readonly Plugin _plugin;
     private readonly MessageManager _messageManager;
     private readonly MessageStore _store;
+    private readonly ILogger<AutoTellTabsService> _logger;
     private readonly object _tempTabsLock = new();
 
     // Hard cap on pinned TempTabs so the sidebar doesn't inflate over years
@@ -29,11 +31,17 @@ internal sealed class AutoTellTabsService : IDisposable
 
     private bool _initialized;
 
-    internal AutoTellTabsService(Plugin plugin, MessageManager messageManager, MessageStore store)
+    internal AutoTellTabsService(
+        Plugin plugin,
+        MessageManager messageManager,
+        MessageStore store,
+        ILogger<AutoTellTabsService> logger
+    )
     {
         _plugin = plugin;
         _messageManager = messageManager;
         _store = store;
+        _logger = logger;
     }
 
     // Derived from the tab list on read. Pin/Unpin/Promote/Logout simply
@@ -67,7 +75,7 @@ internal sealed class AutoTellTabsService : IDisposable
     private void RehydratePinnedTabs()
     {
         var pinned = Plugin.Config.Tabs.Count(TabLifecycleHelpers.IsInPinnedPool);
-        Plugin.LogProxy.Debug($"[Pin] Rehydrate scan: {pinned} pinned tab(s) found");
+        _logger.LogDebug($"[Pin] Rehydrate scan: {pinned} pinned tab(s) found");
 
         foreach (var tab in Plugin.Config.Tabs)
         {
@@ -76,7 +84,7 @@ internal sealed class AutoTellTabsService : IDisposable
 
             if (tab.TellTarget is null || !tab.TellTarget.IsSet())
             {
-                Plugin.LogProxy.Warning(
+                _logger.LogWarning(
                     $"[Pin] Pinned tab '{tab.Name}' has no usable TellTarget "
                         + $"(Name={tab.TellTarget?.Name ?? "<null>"} World={tab.TellTarget?.World ?? 0}). "
                         + "Chat input on this tab will be empty until the partner sends a tell or you /tell manually."
@@ -93,7 +101,7 @@ internal sealed class AutoTellTabsService : IDisposable
             // sees the recent conversation, not a blank tab.
             PreloadHistory(tab, tab.TellTarget.Name, tab.TellTarget.World, Guid.Empty);
 
-            Plugin.LogProxy.Debug(
+            _logger.LogDebug(
                 $"[Pin] Rehydrated '{tab.Name}' -> Tell target {tab.TellTarget.Name}@{tab.TellTarget.World}"
             );
         }
@@ -130,7 +138,7 @@ internal sealed class AutoTellTabsService : IDisposable
         if (partner == null)
         {
             // Diagnostics: helps detect regressions (FFXIV payload changes, new edge cases)
-            Plugin.LogProxy.Warning(
+            _logger.LogWarning(
                 $"[AutoTellTabs] Could not extract tell partner. type={message.Code.Type}, "
                     + $"senderChunks={message.Sender.Count}, contentChunks={message.Content.Count}, "
                     + $"senderSourcePayloads={message.SenderSource?.Payloads?.Count ?? 0}, "
@@ -361,7 +369,7 @@ internal sealed class AutoTellTabsService : IDisposable
         catch (Exception ex)
         {
             // Non-fatal: tab still spawns with visible error notice instead of silent history loss
-            Plugin.LogProxy.Error(ex, "[AutoTellTabs] History preload failed");
+            _logger.LogError(ex, "[AutoTellTabs] History preload failed");
             tab.Messages.AddPrune(
                 MakeSystemMarker(HellionStrings.AutoTellTabs_HistoryLoadError),
                 MessageManager.MessageDisplayLimit
@@ -456,7 +464,7 @@ internal sealed class AutoTellTabsService : IDisposable
     {
         if (!tab.IsTempTab || tab.IsPinned)
         {
-            Plugin.LogProxy.Debug(
+            _logger.LogDebug(
                 $"[Pin] TryPin skipped: IsTempTab={tab.IsTempTab} IsPinned={tab.IsPinned}"
             );
             return false;
@@ -472,7 +480,7 @@ internal sealed class AutoTellTabsService : IDisposable
         }
 
         tab.IsPinned = true;
-        Plugin.LogProxy.Debug(
+        _logger.LogDebug(
             $"[Pin] Pinned tab '{tab.Name}' target={tab.TellTarget?.Name}@{tab.TellTarget?.World}"
         );
         _plugin.SaveConfig();
@@ -495,7 +503,7 @@ internal sealed class AutoTellTabsService : IDisposable
         }
 
         tab.IsPinned = false;
-        Plugin.LogProxy.Debug("[Pin] Unpinned tab '{tab.Name}'");
+        _logger.LogDebug("[Pin] Unpinned tab '{TabName}'", tab.Name);
         _plugin.SaveConfig();
     }
 
@@ -509,9 +517,7 @@ internal sealed class AutoTellTabsService : IDisposable
         tab.IsTempTab = false;
         tab.IsPinned = false;
         tab.TellTarget = TellTarget.Empty();
-        Plugin.LogProxy.Debug(
-            $"[Pin] Promoted tab '{tab.Name}' to permanent (tell-binding dropped)"
-        );
+        _logger.LogDebug($"[Pin] Promoted tab '{tab.Name}' to permanent (tell-binding dropped)");
         _plugin.SaveConfig();
     }
 }

HellionChat/MessageManager.cs

@@ -14,6 +14,7 @@ using HellionChat.Util;
 using Lumina.Text.Expressions;
 using Lumina.Text.Payloads;
 using Lumina.Text.ReadOnly;
+using Microsoft.Extensions.Logging;
 
 namespace HellionChat;
 
@@ -22,6 +23,7 @@ internal class MessageManager : IAsyncDisposable
     internal const int MessageDisplayLimit = 10_000;
 
     private Plugin Plugin { get; }
+    private readonly ILogger<MessageManager> _logger;
     internal MessageStore Store { get; }
 
     private Dictionary<ChatType, NameFormatting> Formats { get; } = [];
@@ -48,11 +50,21 @@ internal class MessageManager : IAsyncDisposable
     // AutoTellTabsService to spawn or refresh temp tabs without coupling.
     public event Action<Message>? MessageProcessed;
 
-    internal unsafe MessageManager(Plugin plugin)
+    internal unsafe MessageManager(
+        Plugin plugin,
+        ILogger<MessageManager> logger,
+        ILoggerFactory loggerFactory
+    )
     {
         Plugin = plugin;
+        _logger = logger;
 
-        Store = new MessageStore(DatabasePath(), Plugin.PlatformUtil, Plugin.LogProxy);
+        Store = new MessageStore(
+            DatabasePath(),
+            Plugin.PlatformUtil,
+            loggerFactory.CreateLogger<MessageStore>(),
+            loggerFactory
+        );
 
         PendingMessageThread = new Thread(() =>
             ProcessPendingMessages(PendingThreadCancellationToken.Token)
@@ -91,7 +103,7 @@ internal class MessageManager : IAsyncDisposable
             await Task.Delay(100);
 
         if (PendingMessageThread.IsAlive)
-            Plugin.LogProxy.Warning(
+            _logger.LogWarning(
                 "PendingMessageThread did not observe cancellation within 10s. "
                     + "Worker remains on background thread; next plugin reload releases it."
             );
@@ -137,7 +149,7 @@ internal class MessageManager : IAsyncDisposable
                 }
                 catch (Exception ex)
                 {
-                    Plugin.LogProxy.Error(ex, "Error processing pending message");
+                    _logger.LogError(ex, "Error processing pending message");
                 }
             }
             else
@@ -182,12 +194,12 @@ internal class MessageManager : IAsyncDisposable
 
         // Mark failed messages as deleted to prevent retry attempts
         var failedIds = messages.FailedMessageIds();
-        Plugin.LogProxy.Info(
+        _logger.LogInformation(
             $"Marking {failedIds.Count} messages as deleted due to parse failures"
         );
         foreach (var msgId in messages.FailedMessageIds())
         {
-            Plugin.LogProxy.Debug($"Marking message '{msgId}' as deleted due to parse failure");
+            _logger.LogDebug($"Marking message '{msgId}' as deleted due to parse failure");
             Store.DeleteMessage(msgId);
         }
     }
@@ -203,13 +215,13 @@ internal class MessageManager : IAsyncDisposable
             }
             catch (Exception ex)
             {
-                Plugin.LogProxy.Error(ex, "Error in FilterAllTabs");
+                _logger.LogError(ex, "Error in FilterAllTabs");
             }
 
             // v1.4.9 R3 profiling: Information so the xllog tail surfaces this
             // without a Debug filter. Belt-and-suspenders for future plugin-load
             // regressions; remains in place after Sub-Task 3.4 Befund.
-            Plugin.LogProxy.Information($"FilterAllTabs took {stopwatch.ElapsedMilliseconds}ms");
+            _logger.LogInformation($"FilterAllTabs took {stopwatch.ElapsedMilliseconds}ms");
         });
     }
 
@@ -264,7 +276,7 @@ internal class MessageManager : IAsyncDisposable
         }
         catch (Exception ex)
         {
-            Plugin.LogProxy.Error(ex, "Error in ContentIdResolver");
+            _logger.LogError(ex, "Error in ContentIdResolver");
         }
     }
 

HellionChat/MessageStore.cs

@@ -9,6 +9,7 @@ using MessagePack;
 using MessagePack.Formatters;
 using MessagePack.Resolvers;
 using Microsoft.Data.Sqlite;
+using Microsoft.Extensions.Logging;
 using Encoding = System.Text.Encoding;
 
 namespace HellionChat;
@@ -179,7 +180,8 @@ internal class MessageStore : IDisposable
     }
 
     private readonly IPlatformUtil _platformUtil;
-    private readonly IPluginLogProxy _logger;
+    private readonly ILogger<MessageStore> _logger;
+    private readonly ILoggerFactory _loggerFactory;
 
     // Readiness gate for the FTS5 full-text index. Volatile so the DbViewer's
     // per-frame IsFtsIndexBuilt read sees the flip the moment the bulk-insert
@@ -197,11 +199,17 @@ internal class MessageStore : IDisposable
     // own SqliteConnection via OpenSecondaryConnection.
     private readonly object _readLock = new();
 
-    internal MessageStore(string dbPath, IPlatformUtil platformUtil, IPluginLogProxy logger)
+    internal MessageStore(
+        string dbPath,
+        IPlatformUtil platformUtil,
+        ILogger<MessageStore> logger,
+        ILoggerFactory loggerFactory
+    )
     {
         DbPath = dbPath;
         _platformUtil = platformUtil;
         _logger = logger;
+        _loggerFactory = loggerFactory;
         Connection = Connect();
         Migrate();
         InitFtsReadyCache();
@@ -246,7 +254,7 @@ internal class MessageStore : IDisposable
         conn.Open();
         ApplyPragmas(conn);
         connectSw.Stop();
-        _logger.Information($"MessageStore.Connect took {connectSw.ElapsedMilliseconds}ms");
+        _logger.LogInformation($"MessageStore.Connect took {connectSw.ElapsedMilliseconds}ms");
         return conn;
     }
 
@@ -290,12 +298,12 @@ internal class MessageStore : IDisposable
             migration();
 
         migrateSw.Stop();
-        _logger.Information($"MessageStore.Migrate took {migrateSw.ElapsedMilliseconds}ms");
+        _logger.LogInformation($"MessageStore.Migrate took {migrateSw.ElapsedMilliseconds}ms");
     }
 
     private void Migrate0()
     {
-        _logger.Information("Running migration 0: Creating tables");
+        _logger.LogInformation("Running migration 0: Creating tables");
         Connection.Execute(
             @"
             CREATE TABLE IF NOT EXISTS messages (
@@ -322,7 +330,7 @@ internal class MessageStore : IDisposable
 
     private void Migrate1()
     {
-        _logger.Information("Running migration 1: Adding Deleted column");
+        _logger.LogInformation("Running migration 1: Adding Deleted column");
         Connection.Execute(
             @"
             ALTER TABLE messages ADD COLUMN Deleted BOOLEAN NOT NULL DEFAULT false;
@@ -334,7 +342,7 @@ internal class MessageStore : IDisposable
 
     private void Migrate2()
     {
-        _logger.Information("Running migration 2: Adding Channel generated column");
+        _logger.LogInformation("Running migration 2: Adding Channel generated column");
         Connection.Execute(
             @"
             ALTER TABLE messages ADD COLUMN Channel INTEGER GENERATED ALWAYS AS (Code & 0x7f) VIRTUAL;
@@ -362,13 +370,15 @@ internal class MessageStore : IDisposable
 
     private void Migrate3()
     {
-        _logger.Information("Running migration 3: Fix log kinds to fit the new format");
+        _logger.LogInformation("Running migration 3: Fix log kinds to fit the new format");
 
         // Recovery for partially-applied Migrate3: schema already in target
         // shape but user_version was never bumped -- just record and exit.
         if (ColumnExists("messages", "ChatType") && !ColumnExists("messages", "Code"))
         {
-            _logger.Information("Migration 3: schema already migrated, only bumping user_version");
+            _logger.LogInformation(
+                "Migration 3: schema already migrated, only bumping user_version"
+            );
             SetMigrationVersion(3);
             return;
         }
@@ -398,7 +408,7 @@ internal class MessageStore : IDisposable
 
     private void Migrate4()
     {
-        _logger.Information("Running migration 4: Add FTS5 virtual table for full-text search");
+        _logger.LogInformation("Running migration 4: Add FTS5 virtual table for full-text search");
 
         // Standalone FTS5 table (no content='messages' linking, no content_rowid).
         // messages.Id is BLOB-PK (Guid), which is incompatible with FTS5's
@@ -422,7 +432,7 @@ internal class MessageStore : IDisposable
 
     private void SetMigrationVersion(int version)
     {
-        _logger.Information($"Setting version {version}");
+        _logger.LogInformation($"Setting version {version}");
         using var cmd = Connection.CreateCommand();
         // PRAGMA does not accept SQLite parameter bindings; version is a
         // compile-time int from the migration sequence, never user input.
@@ -837,7 +847,7 @@ internal class MessageStore : IDisposable
         // Privacy filter -- drop disallowed ChatTypes before they reach storage.
         if (!Plugin.Config.IsAllowedForStorage(message.Code.Type))
         {
-            _logger.Verbose($"Privacy filter dropped message: ChatType={message.Code.Type}");
+            _logger.LogTrace($"Privacy filter dropped message: ChatType={message.Code.Type}");
             return;
         }
 
@@ -941,7 +951,10 @@ internal class MessageStore : IDisposable
             if (to is not null)
                 cmd.Parameters.AddWithValue("$To", to.Value.ToUnixTimeMilliseconds());
 
-            return new MessageEnumerator(cmd.ExecuteReader(), _logger);
+            return new MessageEnumerator(
+                cmd.ExecuteReader(),
+                _loggerFactory.CreateLogger<MessageEnumerator>()
+            );
         }
     }
 
@@ -993,7 +1006,10 @@ internal class MessageStore : IDisposable
 
             cmd.Parameters.AddWithValue("$Count", count);
 
-            return new MessageEnumerator(cmd.ExecuteReader(), _logger);
+            return new MessageEnumerator(
+                cmd.ExecuteReader(),
+                _loggerFactory.CreateLogger<MessageEnumerator>()
+            );
         }
     }
 
@@ -1033,7 +1049,10 @@ internal class MessageStore : IDisposable
             cmd.Parameters.AddWithValue("$TellOutgoing", (int)ChatType.TellOutgoing);
 
             var collected = new List<Message>();
-            using var enumerator = new MessageEnumerator(cmd.ExecuteReader(), _logger);
+            using var enumerator = new MessageEnumerator(
+                cmd.ExecuteReader(),
+                _loggerFactory.CreateLogger<MessageEnumerator>()
+            );
             foreach (var message in enumerator)
             {
                 if (!ChunkUtil.MatchesSender(message, senderName, senderWorld))
@@ -1145,7 +1164,10 @@ internal class MessageStore : IDisposable
                 ((DateTimeOffset)before).ToUnixTimeMilliseconds()
             );
 
-            return new MessageEnumerator(cmd.ExecuteReader(), _logger);
+            return new MessageEnumerator(
+                cmd.ExecuteReader(),
+                _loggerFactory.CreateLogger<MessageEnumerator>()
+            );
         }
     }
 
@@ -1198,7 +1220,10 @@ internal class MessageStore : IDisposable
             cmd.Parameters.AddWithValue("$Offset", DbViewer.RowPerPage * page);
             cmd.Parameters.AddWithValue("$OffsetCount", DbViewer.RowPerPage);
 
-            return new MessageEnumerator(cmd.ExecuteReader(), _logger);
+            return new MessageEnumerator(
+                cmd.ExecuteReader(),
+                _loggerFactory.CreateLogger<MessageEnumerator>()
+            );
         }
     }
 
@@ -1219,14 +1244,14 @@ internal class MessageStore : IDisposable
     }
 }
 
-internal class MessageEnumerator(DbDataReader reader, IPluginLogProxy logger)
+internal class MessageEnumerator(DbDataReader reader, ILogger<MessageEnumerator> logger)
     : IEnumerable<Message>,
         IDisposable,
         IAsyncDisposable
 {
     private const int MaxErrorLogs = 10;
 
-    private readonly IPluginLogProxy _logger = logger;
+    private readonly ILogger<MessageEnumerator> _logger = logger;
     private readonly List<Guid> FailedIds = [];
     private int FailedCount;
     public bool DidError => FailedCount > 0;
@@ -1247,10 +1272,10 @@ internal class MessageEnumerator(DbDataReader reader, IPluginLogProxy logger)
             catch (Exception e)
             {
                 if (FailedCount < MaxErrorLogs)
-                    _logger.Error($"Exception while reading message '{id}' from database: {e}");
+                    _logger.LogError($"Exception while reading message '{id}' from database: {e}");
                 FailedCount++;
                 if (FailedCount == MaxErrorLogs)
-                    _logger.Error("Further parsing errors will not be logged");
+                    _logger.LogError("Further parsing errors will not be logged");
                 if (id != Guid.Empty)
                     FailedIds.Add(id);
 

HellionChat/PluginHostFactory.cs

@@ -121,7 +121,11 @@ internal static class PluginHostFactory
             sp.GetRequiredService<IFramework>()
         ));
 
-        services.AddSingleton(sp => new MessageManager(sp.GetRequiredService<Plugin>()));
+        services.AddSingleton(sp => new MessageManager(
+            sp.GetRequiredService<Plugin>(),
+            sp.GetRequiredService<ILogger<MessageManager>>(),
+            sp.GetRequiredService<ILoggerFactory>()
+        ));
 
         // AutoTellTabsService pulls MessageStore through MessageManager.Store
         // because MessageStore is still allocated inside MessageManager.ctor
@@ -131,7 +135,12 @@ internal static class PluginHostFactory
         {
             var pluginRef = sp.GetRequiredService<Plugin>();
             var manager = sp.GetRequiredService<MessageManager>();
-            return new AutoTellTabsService(pluginRef, manager, manager.Store);
+            return new AutoTellTabsService(
+                pluginRef,
+                manager,
+                manager.Store,
+                sp.GetRequiredService<ILogger<AutoTellTabsService>>()
+            );
         });
 
         // -----------------------------------------------------------------