[11740] Restore spellmod charges used by fail spell cast

Signed-off-by: VladimirMangos <vladimir@getmangos.com>

Also

 * Prevent more one charge use for same spell cast
 * Cleanup enum SpellState from unused cases
 * Propertly remove spellmod charges at spell finish in case pet/totem caster

src/game/Player.cpp

@@ -18718,6 +18718,31 @@ void Player::RemoveSpellMods(Spell const* spell)
     }
 }
 
+void Player::ResetSpellModsDueToCanceledSpell (Spell const* spell)
+{
+    for(int i = 0; i < MAX_SPELLMOD; ++i )
+    {
+        for (SpellModList::const_iterator itr = m_spellMods[i].begin(); itr != m_spellMods[i].end(); ++itr)
+        {
+            SpellModifier *mod = *itr;
+
+            if (mod->lastAffected != spell)
+                continue;
+
+            mod->lastAffected = NULL;
+
+            if (mod->charges == -1)
+            {
+                mod->charges = 1;
+                if (m_SpellModRemoveCount > 0)
+                    --m_SpellModRemoveCount;
+            }
+            else if (mod->charges > 0)
+                ++mod->charges;
+        }
+    }
+}
+
 // send Proficiency
 void Player::SendProficiency(ItemClass itemClass, uint32 itemSubclassMask)
 {

src/game/Player.h

@@ -139,7 +139,7 @@ struct SpellModifier
     int32 value;
     ClassFamilyMask mask;
     uint32 spellId;
-    Spell const* lastAffected;
+    Spell const* lastAffected;                              // mark last charge user, used for cleanup delayed remove spellmods at spell success or restore charges at cast fail (Is one pointer only need for cases mixed castes?)
 };
 
 typedef std::list<SpellModifier*> SpellModList;
@@ -1647,6 +1647,7 @@ class MANGOS_DLL_SPEC Player : public Unit
         bool IsAffectedBySpellmod(SpellEntry const *spellInfo, SpellModifier *mod, Spell const* spell = NULL);
         template <class T> T ApplySpellMod(uint32 spellId, SpellModOp op, T &basevalue, Spell const* spell = NULL);
         void RemoveSpellMods(Spell const* spell);
+        void ResetSpellModsDueToCanceledSpell (Spell const* spell);
 
         static uint32 const infinityCooldownDelay = MONTH;  // used for set "infinity cooldowns" for spells and check
         static uint32 const infinityCooldownDelayCheck = MONTH/2;
@@ -2693,16 +2694,23 @@ template <class T> T Player::ApplySpellMod(uint32 spellId, SpellModOp op, T &bas
         }
 
         if (mod->charges > 0)
+        {
+            if (!spell)
+                spell = FindCurrentSpellBySpellId(spellId);
+
+            // avoid double use spellmod charge by same spell
+            if (!mod->lastAffected || mod->lastAffected != spell)
             {
                 --mod->charges;
+
                 if (mod->charges == 0)
                 {
                     mod->charges = -1;
-                mod->lastAffected = spell;
-                if(!mod->lastAffected)
-                    mod->lastAffected = FindCurrentSpellBySpellId(spellId);
                     ++m_SpellModRemoveCount;
                 }
+
+                mod->lastAffected = spell;
+            }
         }
     }
 

src/game/Spell.cpp

@@ -361,7 +361,7 @@ Spell::Spell( Unit* caster, SpellEntry const *info, bool triggered, ObjectGuid o
     for(int i = 0; i < MAX_EFFECT_INDEX; ++i)
         m_currentBasePoints[i] = m_spellInfo->CalculateSimpleValue(SpellEffectIndex(i));
 
-    m_spellState = SPELL_STATE_NULL;
+    m_spellState = SPELL_STATE_PREPARING;
 
     m_castPositionX = m_castPositionY = m_castPositionZ = 0;
     m_TriggerSpells.clear();
@@ -3500,16 +3500,22 @@ void Spell::finish(bool ok)
     if (m_spellState == SPELL_STATE_FINISHED)
         return;
 
+    // remove/restore spell mods before m_spellState update
+    if (Player* modOwner = m_caster->GetSpellModOwner())
+    {
+        if (ok || m_spellState != SPELL_STATE_PREPARING)    // fail after start channeling or throw to target not affect spell mods
+            modOwner->RemoveSpellMods(this);
+        else
+            modOwner->ResetSpellModsDueToCanceledSpell(this);
+    }
+
     m_spellState = SPELL_STATE_FINISHED;
 
+
     // other code related only to successfully finished spells
     if (!ok)
         return;
 
-    // remove spell mods
-    if (m_caster->GetTypeId() == TYPEID_PLAYER)
-        ((Player*)m_caster)->RemoveSpellMods(this);
-
     // handle SPELL_AURA_ADD_TARGET_TRIGGER auras
     Unit::AuraList const& targetTriggers = m_caster->GetAurasByType(SPELL_AURA_ADD_TARGET_TRIGGER);
     for(Unit::AuraList::const_iterator i = targetTriggers.begin(); i != targetTriggers.end(); ++i)

src/game/Spell.h

@@ -201,12 +201,10 @@ inline ByteBuffer& operator>> (ByteBuffer& buf, SpellCastTargetsReader const& ta
 
 enum SpellState
 {
-    SPELL_STATE_NULL      = 0,
-    SPELL_STATE_PREPARING = 1,
-    SPELL_STATE_CASTING   = 2,
-    SPELL_STATE_FINISHED  = 3,
-    SPELL_STATE_IDLE      = 4,
-    SPELL_STATE_DELAYED   = 5
+    SPELL_STATE_PREPARING = 0,                              // cast time delay period, non channeled spell
+    SPELL_STATE_CASTING   = 1,                              // channeled time period spell casting state
+    SPELL_STATE_FINISHED  = 2,                              // cast finished to success or fail
+    SPELL_STATE_DELAYED   = 3                               // spell casted but need time to hit target(s)
 };
 
 enum SpellTargets

src/shared/revision_nr.h

@@ -1,4 +1,4 @@
 #ifndef __REVISION_NR_H__
 #define __REVISION_NR_H__
- #define REVISION_NR "11739"
+ #define REVISION_NR "11740"
 #endif // __REVISION_NR_H__