Don't modify base records from Lua

apps/openmw/mwlua/magicbindings.cpp

@@ -830,10 +830,10 @@ namespace MWLua
         spellsT["add"] = [context](const ActorSpells& spells, const sol::object& spellOrId) {
             if (spells.mActor.isLObject())
                 throw std::runtime_error("Local scripts can modify only spells of the actor they are attached to.");
-            context.mLuaManager->addAction([obj = spells.mActor.object(), id = toSpellId(spellOrId)]() {
+            context.mLuaManager->addAction([obj = spells.mActor.object(), spell = toSpell(spellOrId)]() {
                 const MWWorld::Ptr& ptr = obj.ptr();
                 if (ptr.getClass().isActor())
-                    ptr.getClass().getCreatureStats(ptr).getSpells().add(id);
+                    ptr.getClass().getCreatureStats(ptr).getSpells().add(spell, false);
             });
         };
 
@@ -841,10 +841,10 @@ namespace MWLua
         spellsT["remove"] = [context](const ActorSpells& spells, const sol::object& spellOrId) {
             if (spells.mActor.isLObject())
                 throw std::runtime_error("Local scripts can modify only spells of the actor they are attached to.");
-            context.mLuaManager->addAction([obj = spells.mActor.object(), id = toSpellId(spellOrId)]() {
+            context.mLuaManager->addAction([obj = spells.mActor.object(), spell = toSpell(spellOrId)]() {
                 const MWWorld::Ptr& ptr = obj.ptr();
                 if (ptr.getClass().isActor())
-                    ptr.getClass().getCreatureStats(ptr).getSpells().remove(id);
+                    ptr.getClass().getCreatureStats(ptr).getSpells().remove(spell, false);
             });
         };
 

apps/openmw/mwmechanics/spells.cpp

@@ -60,14 +60,17 @@ namespace MWMechanics
         return std::find(mSpells.begin(), mSpells.end(), spell) != mSpells.end();
     }
 
-    void Spells::add(const ESM::Spell* spell)
+    void Spells::add(const ESM::Spell* spell, bool modifyBase)
     {
-        mSpellList->add(spell);
+        if (modifyBase)
+            mSpellList->add(spell);
+        else
+            addSpell(spell);
     }
 
-    void Spells::add(const ESM::RefId& spellId)
+    void Spells::add(const ESM::RefId& spellId, bool modifyBase)
     {
-        add(SpellList::getSpell(spellId));
+        add(SpellList::getSpell(spellId), modifyBase);
     }
 
     void Spells::addSpell(const ESM::Spell* spell)
@@ -76,13 +79,17 @@ namespace MWMechanics
             mSpells.emplace_back(spell);
     }
 
-    void Spells::remove(const ESM::RefId& spellId)
+    void Spells::remove(const ESM::RefId& spellId, bool modifyBase)
     {
-        const auto spell = SpellList::getSpell(spellId);
-        removeSpell(spell);
-        mSpellList->remove(spell);
+        remove(SpellList::getSpell(spellId), modifyBase);
+    }
 
-        if (spellId == mSelectedSpell)
+    void Spells::remove(const ESM::Spell* spell, bool modifyBase)
+    {
+        removeSpell(spell);
+        if (modifyBase)
+            mSpellList->remove(spell);
+        if (spell->mId == mSelectedSpell)
             mSelectedSpell = ESM::RefId();
     }
 

apps/openmw/mwmechanics/spells.hpp

@@ -74,24 +74,25 @@ namespace MWMechanics
         bool hasSpell(const ESM::RefId& spell) const;
         bool hasSpell(const ESM::Spell* spell) const;
 
-        void add(const ESM::RefId& spell);
+        void add(const ESM::RefId& spell, bool modifyBase = true);
         ///< Adding a spell that is already listed in *this is a no-op.
 
-        void add(const ESM::Spell* spell);
+        void add(const ESM::Spell* spell, bool modifyBase = true);
         ///< Adding a spell that is already listed in *this is a no-op.
 
-        void remove(const ESM::RefId& spell);
+        void remove(const ESM::RefId& spell, bool modifyBase = true);
+        void remove(const ESM::Spell* spell, bool modifyBase = true);
         ///< If the spell to be removed is the selected spell, the selected spell will be changed to
-        /// no spell (empty string).
+        /// no spell (empty id).
 
         void clear(bool modifyBase = false);
-        ///< Remove all spells of al types.
+        ///< Remove all spells of all types.
 
         void setSelectedSpell(const ESM::RefId& spellId);
         ///< This function does not verify, if the spell is available.
 
         const ESM::RefId& getSelectedSpell() const;
-        ///< May return an empty string.
+        ///< May return an empty id.
 
         bool hasCommonDisease() const;