fix(Scripts/MoltenCore): Implement Ragnaros' Lava Bursts (#9526)

data/sql/updates/pending_db_world/rev_1638745963138176600.sql

@@ -0,0 +1,18 @@
+INSERT INTO `version_db_world` (`sql_rev`) VALUES ('1638745963138176600');
+
+-- Positions are sniffed, but position/spell relation cant be confirmed (serverside spells)
+DELETE FROM `spell_target_position` WHERE ID IN (21886, 21900, 21901, 21902, 21903, 21904, 21905, 21906, 21907);
+INSERT INTO `spell_target_position` (`ID`, `EffectIndex`, `MapID`, `PositionX`, `PositionY`, `PositionZ`, `Orientation`, `VerifiedBuild`) VALUES
+(21886, 0, 409, 871.53997802734375, -839.114990234375, -228.99200439453125, 0, 0),
+(21900, 0, 409, 843.50897216796875, -798.31298828125,    -229.4320068359375, 0, 0), 
+(21901, 0, 409, 827.2760009765625, -874.02801513671875, -229.593994140625, 0, 0),
+(21902, 0, 409, 864.572998046875, -806.4630126953125, -229.785995483398437, 0, 0),
+(21903, 0, 409, 819.75701904296875, -807.176025390625, -229.033004760742187, 0, 0),
+(21904, 0, 409, 811.0009765625, -822.281982421875, -229.311004638671875, 0, 0),
+(21905, 0, 409, 892.63299560546875, -790.40997314453125, -228.927993774414062, 0, 0),
+(21906, 0, 409, 906.69500732421875, -828.61102294921875, -229.927993774414062, 0, 0),
+(21907, 0, 409, 862.86199951171875, -866.95501708984375, -228.9429931640625, 0, 0);
+
+DELETE FROM `spell_script_names` WHERE `spell_id` = 21908;
+INSERT INTO `spell_script_names` (`spell_id`, `ScriptName`) VALUES
+(21908, 'spell_ragnaros_lava_burst_randomizer');

src/server/scripts/EasternKingdoms/BlackrockMountain/MoltenCore/boss_ragnaros.cpp

@@ -17,6 +17,7 @@
 
 #include "ScriptMgr.h"
 #include "ScriptedCreature.h"
+#include "SpellScript.h"
 #include "molten_core.h"
 
 enum Texts
@@ -49,6 +50,16 @@ enum Spells
     SPELL_MIGHT_OF_RAGNAROS                 = 21154,
     SPELL_INTENSE_HEAT                      = 21155,
     SPELL_SUMMON_SONS_FLAME                 = 21108,    // Trigger the eight spells summoning the Son of Flame adds (TODO)
+
+    SPELL_LAVA_BURST_A                      = 21886,
+    SPELL_LAVA_BURST_B                      = 21900,
+    SPELL_LAVA_BURST_C                      = 21901,
+    SPELL_LAVA_BURST_D                      = 21902,
+    SPELL_LAVA_BURST_E                      = 21903,
+    SPELL_LAVA_BURST_F                      = 21905,
+    SPELL_LAVA_BURST_G                      = 21906,
+    SPELL_LAVA_BURST_H                      = 21907,
+    SPELL_LAVA_BURST_TRAP                   = 21158
 };
 
 enum Events
@@ -61,6 +72,7 @@ enum Events
     EVENT_MAGMA_BLAST_MELEE_CHECK,
     EVENT_MAGMA_BLAST,
     EVENT_SUBMERGE,
+    EVENT_LAVA_BURST_TRIGGER,
 
     // Submerge
     EVENT_EMERGE,
@@ -125,6 +137,7 @@ public:
             _hasSubmergedOnce = false;
             _isKnockbackEmoteAllowed = true;
             me->SetUInt32Value(UNIT_NPC_EMOTESTATE, 0);
+            _lavaBurstGUIDS.clear();
         }
 
         void DoAction(int32 action) override
@@ -145,6 +158,19 @@ public:
             }
         }
 
+        void SetGUID(ObjectGuid guid, int32 index) override
+        {
+            if (index == GO_LAVA_BURST)
+            {
+                if (_lavaBurstGUIDS.empty())
+                {
+                    extraEvents.ScheduleEvent(EVENT_LAVA_BURST_TRIGGER, 1);
+                }
+
+                _lavaBurstGUIDS.insert(guid);
+            }
+        }
+
         void SummonedCreatureDies(Creature* summon, Unit* /*killer*/) override
         {
             summons.Despawn(summon);
@@ -222,6 +248,28 @@ public:
                             _isKnockbackEmoteAllowed = true;
                             break;
                         }
+                        case EVENT_LAVA_BURST_TRIGGER:
+                        {
+                            if (!_lavaBurstGUIDS.empty())
+                            {
+                                ObjectGuid lavaBurstGUID = Acore::Containers::SelectRandomContainerElement(_lavaBurstGUIDS);
+
+                                if (GameObject* go = ObjectAccessor::GetGameObject(*me, lavaBurstGUID))
+                                {
+                                    go->CastSpell(nullptr, SPELL_LAVA_BURST_TRAP);
+                                    go->SendCustomAnim(0);
+                                }
+
+                                _lavaBurstGUIDS.erase(lavaBurstGUID);
+                                extraEvents.RepeatEvent(1000);
+                            }
+                            else
+                            {
+                                events.RescheduleEvent(EVENT_LAVA_BURST, 10000, PHASE_EMERGED, PHASE_EMERGED);
+                            }
+
+                            break;
+                        }
                     }
                 }
             }
@@ -246,6 +294,7 @@ public:
                     case EVENT_WRATH_OF_RAGNAROS:
                     {
                         DoCastVictim(SPELL_WRATH_OF_RAGNAROS);
+
                         if (urand(0, 1))
                         {
                             Talk(SAY_WRATH);
@@ -268,7 +317,6 @@ public:
                     case EVENT_LAVA_BURST:
                     {
                         DoCastAOE(SPELL_LAVA_BURST);
-                        events.RepeatEvent(10000);
                         break;
                     }
                     case EVENT_MAGMA_BLAST_MELEE_CHECK:
@@ -377,6 +425,8 @@ public:
         bool _hasSubmergedOnce;
         bool _isKnockbackEmoteAllowed;  // Prevents possible text overlap
 
+        GuidSet _lavaBurstGUIDS;
+
         void HandleEmerge()
         {
             if (events.IsInPhase(PHASE_EMERGED))
@@ -425,7 +475,39 @@ public:
     }
 };
 
+constexpr std::array<uint32, 8> RagnarosLavaBurstSpells = { SPELL_LAVA_BURST_A, SPELL_LAVA_BURST_B, SPELL_LAVA_BURST_C, SPELL_LAVA_BURST_D, SPELL_LAVA_BURST_E, SPELL_LAVA_BURST_F, SPELL_LAVA_BURST_G, SPELL_LAVA_BURST_H };
+
+// 21908 - Lava Burst Randomizer
+class spell_ragnaros_lava_burst_randomizer : public SpellScript
+{
+    PrepareSpellScript(spell_ragnaros_lava_burst_randomizer);
+
+    bool Validate(SpellInfo const* /*spellInfo*/) override
+    {
+        return ValidateSpellInfo(RagnarosLavaBurstSpells);
+    }
+
+    void HandleScript()
+    {
+        if (Unit* caster = GetCaster())
+        {
+            // Select three random spells. Can select the same spell twice.
+            for (uint8 i = 0; i < 3; ++i)
+            {
+                uint32 spell = Acore::Containers::SelectRandomContainerElement(RagnarosLavaBurstSpells);
+                caster->CastSpell(caster, spell, true);
+            }
+        }
+    }
+
+    void Register() override
+    {
+        AfterCast += SpellCastFn(spell_ragnaros_lava_burst_randomizer::HandleScript);
+    }
+};
+
 void AddSC_boss_ragnaros()
 {
     new boss_ragnaros();
+    RegisterSpellScript(spell_ragnaros_lava_burst_randomizer);
 }

src/server/scripts/EasternKingdoms/BlackrockMountain/MoltenCore/instance_molten_core.cpp

@@ -210,6 +210,14 @@ public:
                     _lavaSplashGUID = go->GetGUID();
                     break;
                 }
+                case GO_LAVA_BURST:
+                {
+                    if (Creature* ragnaros = instance->GetCreature(_ragnarosGUID))
+                    {
+                        ragnaros->AI()->SetGUID(go->GetGUID(), GO_LAVA_BURST);
+                    }
+                    break;
+                }
             }
         }
 

src/server/scripts/EasternKingdoms/BlackrockMountain/MoltenCore/molten_core.h

@@ -109,6 +109,7 @@ enum MCGameObjects
     // Ragnaros event related
     GO_LAVA_STEAM                   = 178107,
     GO_LAVA_SPLASH                  = 178108,
+    GO_LAVA_BURST                   = 178088,
 };
 
 enum MCSpells