Scripts: Implemented virtual function DoCastSpellOnPlayers (self-explanatory) and CheckRequiredBosses checking states of other bosses before allowing combat with selected one

Scripts/Icecrown Citadel: Added checks to prevent skipping bosses

src/server/game/AI/ScriptedAI/ScriptedCreature.cpp

@@ -545,7 +545,15 @@ void BossAI::_EnterCombat()
     me->setActive(true);
     DoZoneInCombat();
     if (instance)
+    {
+        // bosses do not respawn, check only on enter combat
+        if (!instance->CheckRequiredBosses(bossId))
+        {
+            EnterEvadeMode();
+            return;
+        }
         instance->SetBossState(bossId, IN_PROGRESS);
+    }
 }
 
 void BossAI::TeleportCheaters()

src/server/game/Instances/InstanceScript.cpp

@@ -379,6 +379,17 @@ void InstanceScript::DoRemoveAurasDueToSpellOnPlayers(uint32 spell)
                 pPlayer->RemoveAurasDueToSpell(spell);
 }
 
+// Cast spell on all players in instance
+void InstanceScript::DoCastSpellOnPlayers(uint32 spell)
+{
+    Map::PlayerList const &PlayerList = instance->GetPlayers();
+
+    if (!PlayerList.isEmpty())
+        for (Map::PlayerList::const_iterator i = PlayerList.begin(); i != PlayerList.end(); ++i)
+            if (Player* player = i->getSource())
+                player->CastSpell(player, spell, true);
+}
+
 bool InstanceScript::CheckAchievementCriteriaMeet(uint32 criteria_id, Player const* /*source*/, Unit const* /*target*/ /*= NULL*/, uint32 /*miscvalue1*/ /*= 0*/)
 {
     sLog->outError("Achievement system call InstanceScript::CheckAchievementCriteriaMeet but instance script for map %u not have implementation for achievement criteria %u",

src/server/game/Instances/InstanceScript.h

@@ -173,6 +173,9 @@ class InstanceScript : public ZoneScript
         // Remove Auras due to Spell on all players in instance
         void DoRemoveAurasDueToSpellOnPlayers(uint32 spell);
 
+        // Cast spell on all players in instance
+        void DoCastSpellOnPlayers(uint32 spell);
+
         // Return wether server allow two side groups or not
         bool ServerAllowsTwoSideGroups() { return sWorld->getBoolConfig(CONFIG_ALLOW_TWO_SIDE_INTERACTION_GROUP); }
 
@@ -183,6 +186,10 @@ class InstanceScript : public ZoneScript
         // Achievement criteria additional requirements check
         // NOTE: not use this if same can be checked existed requirement types from AchievementCriteriaRequirementType
         virtual bool CheckAchievementCriteriaMeet(uint32 /*criteria_id*/, Player const* /*source*/, Unit const* /*target*/ = NULL, uint32 /*miscvalue1*/ = 0);
+
+        // Checks boss requirements (one boss required to kill other)
+        virtual bool CheckRequiredBosses(uint32 /*bossId*/, Player const* /*player*/ = NULL) const { return true; }
+
     protected:
         void SetBossNumber(uint32 number) { bosses.resize(number); }
         void LoadDoorData(const DoorData *data);