feat(Core/AI): Implement delay option to the Talk() function (#14950)

src/server/game/AI/CreatureAI.cpp

@@ -40,9 +40,26 @@ void CreatureAI::OnCharmed(bool /*apply*/)
 AISpellInfoType* UnitAI::AISpellInfo;
 AISpellInfoType* GetAISpellInfo(uint32 i) { return &CreatureAI::AISpellInfo[i]; }
 
-void CreatureAI::Talk(uint8 id, WorldObject const* target /*= nullptr*/)
+/**
+ * @brief Causes the creature to talk/say the text assigned to their entry in the `creature_text` database table.
+ *
+ * @param uint8 id Text ID from `creature_text`.
+ * @param WorldObject target The target of the speech, in case it has elements such as $n, where the target's name will be referrenced.
+ * @param Milliseconds delay Delay until the creature says the text line. Creatures will talk immediately by default.
+ */
+void CreatureAI::Talk(uint8 id, WorldObject const* target /*= nullptr*/, Milliseconds delay /*= 0s*/)
 {
-    sCreatureTextMgr->SendChat(me, id, target);
+    if (delay > Seconds::zero())
+    {
+        me->m_Events.AddEventAtOffset([this, id, target]()
+        {
+            sCreatureTextMgr->SendChat(me, id, target);
+        }, delay);
+    }
+    else
+    {
+        sCreatureTextMgr->SendChat(me, id, target);
+    }
 }
 
 inline bool IsValidCombatTarget(Creature* source, Player* target)

src/server/game/AI/CreatureAI.h

@@ -92,7 +92,8 @@ public:
         EVADE_REASON_OTHER
     };
 
-    void Talk(uint8 id, WorldObject const* whisperTarget = nullptr);
+    void Talk(uint8 id, WorldObject const* whisperTarget = nullptr, Milliseconds delay = 0s);
+    void Talk(uint8 id, Milliseconds delay) { Talk(id, nullptr, delay); }
 
     explicit CreatureAI(Creature* creature) : UnitAI(creature), me(creature), _boundary(nullptr), _negateBoundary(false), m_MoveInLineOfSight_locked(false) { }
 

src/server/scripts/Kalimdor/CavernsOfTime/EscapeFromDurnholdeKeep/boss_captain_skarloc.cpp

@@ -67,13 +67,11 @@ public:
         boss_captain_skarlocAI(Creature* creature) : ScriptedAI(creature), summons(me) { }
 
         EventMap events;
-        EventMap events2;
         SummonList summons;
 
         void Reset() override
         {
             events.Reset();
-            events2.Reset();
             summons.DespawnAll();
         }
 
@@ -130,8 +128,24 @@ public:
 
             if (me->movespline->Finalized())
             {
-                events2.ScheduleEvent(EVENT_INITIAL_TALK, 500);
+                Talk(SAY_ENTER, 500ms);
-                events2.ScheduleEvent(EVENT_START_FIGHT, 8000);
+
+                me->m_Events.AddEventAtOffset([this]()
+                {
+                    me->SetImmuneToAll(false);
+                    me->SetInCombatWithZone();
+                    for (SummonList::const_iterator itr = summons.begin(); itr != summons.end(); ++itr)
+                    {
+                        if (Creature* summon = ObjectAccessor::GetCreature(*me, *itr))
+                        {
+                            if (summon->GetEntry() != NPC_SKARLOC_MOUNT)
+                            {
+                                summon->SetImmuneToAll(false);
+                                summon->SetInCombatWithZone();
+                            }
+                        }
+                    }
+                }, 8s);
             }
         }
 
@@ -161,25 +175,6 @@ public:
 
         void UpdateAI(uint32 diff) override
         {
-            events2.Update(diff);
-            switch (events2.ExecuteEvent())
-            {
-                case EVENT_INITIAL_TALK:
-                    Talk(SAY_ENTER);
-                    break;
-                case EVENT_START_FIGHT:
-                    me->SetImmuneToAll(false);
-                    me->SetInCombatWithZone();
-                    for (SummonList::const_iterator itr = summons.begin(); itr != summons.end(); ++itr)
-                        if (Creature* summon = ObjectAccessor::GetCreature(*me, *itr))
-                            if (summon->GetEntry() != NPC_SKARLOC_MOUNT)
-                            {
-                                summon->SetImmuneToAll(false);
-                                summon->SetInCombatWithZone();
-                            }
-                    break;
-            }
-
             if (!UpdateVictim())
                 return;