D1 (XC-8): extract shared PrefillTellInput/BuildTellCommand for the two tell-prefill detours

HellionChat/GameFunctions/Chat.cs

@@ -317,6 +317,30 @@ internal sealed unsafe class Chat : IDisposable
         ReplyInSelectedChatModeHook!.Original(agent);
     }
 
+    // Pure /tell-prefill command builder, shared by the two native SetTellTarget
+    // detours and the PayloadHandler Send-Tell payload. Empty/null world drops the
+    // @World suffix (matches the old IsNullOrEmpty guard); trailing space lets the
+    // user type straight after. internal static so the Build-Suite can pin it
+    // frame-free. TEST-MIRROR: ../../../Hellion Build test/GameFunctions/PrefillTellCommandTests.cs
+    internal static string BuildTellCommand(string name, string? world)
+    {
+        var command = $"/tell {name}";
+        if (!string.IsNullOrEmpty(world))
+            command += $"@{world}";
+        command += " ";
+        return command;
+    }
+
+    // Prefills + focuses our own input bar with a /tell command. The DI/Dalamud
+    // vorspann (Plugin.InputBar) lives here; the string assembly is BuildTellCommand.
+    // The in-foray TellSpecial routing (SetEurekaTellChannel) is NOT this helper's
+    // job — it stays at the call-site (v1.8.1 deferral).
+    private void PrefillTellInput(string name, string? world)
+    {
+        Plugin.InputBar.SetPendingMessage(BuildTellCommand(name, world));
+        Plugin.InputBar.Activate = true;
+    }
+
     private bool SetContextTellTarget(
         RaptureShellModule* a1,
         Utf8String* playerName,
@@ -334,14 +358,10 @@ internal sealed unsafe class Chat : IDisposable
             // "Send Tell" payload menu does (PayloadHandler), then focus. Prefill-
             // only — no tab switch, no ChatActivatedArgs revival (Flo decision
             // 2026-06-15). The game supplies worldName here, so no sheet lookup.
-            var tellName = playerName->ToString();
-            var tellWorld = worldName != null ? worldName->ToString() : string.Empty;
-            var tellCommand = $"/tell {tellName}";
-            if (!string.IsNullOrEmpty(tellWorld))
-                tellCommand += $"@{tellWorld}";
-            tellCommand += " ";
-            Plugin.InputBar.SetPendingMessage(tellCommand);
-            Plugin.InputBar.Activate = true;
+            PrefillTellInput(
+                playerName->ToString(),
+                worldName != null ? worldName->ToString() : null
+            );
         }
 
         return SetChatLogTellTargetHook!.Original(
@@ -374,14 +394,10 @@ internal sealed unsafe class Chat : IDisposable
             // In-foray right-click -> Send Tell: same prefill path as the non-foray
             // tell. The foray-specific TellSpecial channel routing stays deferred
             // (v1.8.1, SetEurekaTellChannel) — prefill-only here (Flo decision 2026-06-15).
-            var forayName = playerName->ToString();
-            var forayWorld = worldName != null ? worldName->ToString() : string.Empty;
-            var forayCommand = $"/tell {forayName}";
-            if (!string.IsNullOrEmpty(forayWorld))
-                forayCommand += $"@{forayWorld}";
-            forayCommand += " ";
-            Plugin.InputBar.SetPendingMessage(forayCommand);
-            Plugin.InputBar.Activate = true;
+            PrefillTellInput(
+                playerName->ToString(),
+                worldName != null ? worldName->ToString() : null
+            );
         }
 
         ContextMenuTellInForayHook!.Original(