AutoLearn SPells on LevelUP

#include "ScriptPCH.h"
#include "ScriptMgr.h"

class player_learnspell : public PlayerScript
 {
 public:
    player_learnspell() : PlayerScript ("player_learnspell") {}

    void OnLevelChanged(Player* player, uint8 oldLevel)
    {
    uint8 newLevel = player->getLevel();
    if (newLevel < oldLevel) return;
    uint32 entry;
    switch (player->getClass()) {
    case CLASS_ROGUE: entry = 917; break;
    case CLASS_PRIEST: entry = 377; break;
    case CLASS_MAGE: entry = 328; break;
    case CLASS_PALADIN: entry = 927; break;
    case CLASS_WARRIOR: entry = 913; break;
    case CLASS_SHAMAN: entry = 20407; break;
    case CLASS_DRUID: entry = 5505; break;
    case CLASS_HUNTER: entry = 5515; break;
    case CLASS_WARLOCK: entry = 5496; break;
    case CLASS_DEATH_KNIGHT: entry = 29196; break;
    }


     TrainerSpellData const* t_spells = (sObjectMgr->GetNpcTrainerSpells(entry));
     for (TrainerSpellMap::const_iterator itr = t_spells->spellList.begin(); itr != t_spells->spellList.end(); ++itr) {
         uint32 f_spell = itr->first;
         TrainerSpell const* spell = t_spells->Find(f_spell);
         if (!spell) continue;
         if ((spell->reqLevel > newLevel) || (player->HasSpell(f_spell))) continue;
         const SpellInfo* prevSpellInfo = sSpellMgr->GetSpellInfo(f_spell)->GetPrevRankSpell();
         if ((prevSpellInfo && player->HasSpell(prevSpellInfo->Id)) || !prevSpellInfo) player->learnSpell(f_spell, false);
     }
    }
};

void AddSC_player_learnspell()
{
new player_learnspell();
}