text: /**
   * MaNGOS is a full featured server for World of Warcraft, supporting
   * the following clients: 1.12.x, 2.4.3, 3.3.5a, 4.3.4a and 5.4.8
   *
   * Copyright (C) 2005-2016  MaNGOS project <https://getmangos.eu>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   *
   * World of Warcraft, and all World of Warcraft or Warcraft art, images,
   * and lore are copyrighted by Blizzard Entertainment, Inc.
   */
  
  #include "Common.h"
  #include "CharacterDatabaseCleaner.h"
  #include "World.h"
  #include "Database/DatabaseEnv.h"
  #include "DBCStores.h"
  #include "ProgressBar.h"
  
  void CharacterDatabaseCleaner::CleanDatabase()
  {
      // config to disable
      if (!sWorld.getConfig(CONFIG_BOOL_CLEAN_CHARACTER_DB))
          return;
  
      sLog.outString("Cleaning character database...");
  
      // check flags which clean ups are necessary
      QueryResult* result = CharacterDatabase.PQuery("SELECT cleaning_flags FROM saved_variables");
      if (!result)
          return;
      uint32 flags = (*result)[0].GetUInt32();
      delete result;
  
      // clean up
      if (flags & CLEANING_FLAG_ACHIEVEMENT_PROGRESS)
          CleanCharacterAchievementProgress();
      if (flags & CLEANING_FLAG_SKILLS)
          CleanCharacterSkills();
      if (flags & CLEANING_FLAG_SPELLS)
          CleanCharacterSpell();
      if (flags & CLEANING_FLAG_TALENTS)
          CleanCharacterTalent();
      CharacterDatabase.Execute("UPDATE saved_variables SET cleaning_flags = 0");
  }
  
  void CharacterDatabaseCleaner::CheckUnique(const char* column, const char* table, bool (*check)(uint32))
  {
      QueryResult* result = CharacterDatabase.PQuery("SELECT DISTINCT %s FROM %s", column, table);
      if (!result)
      {
          sLog.outString("Table %s is empty.", table);
          return;
      }
  
      bool found = false;
      std::ostringstream ss;
      BarGoLink bar(result->GetRowCount());
      do
      {
          bar.step();
  
          Field* fields = result->Fetch();
  
          uint32 id = fields[0].GetUInt32();
  
          if (!check(id))
          {
              if (!found)
              {
                  ss << "DELETE FROM " << table << " WHERE " << column << " IN (";
                  found = true;
              }
              else
                  ss << ",";
              ss << id;
          }
      }
      while (result->NextRow());
      delete result;
  
      if (found)
      {
          ss << ")";
          CharacterDatabase.Execute(ss.str().c_str());
      }
  }
  
  bool CharacterDatabaseCleaner::AchievementProgressCheck(uint32 criteria)
  {
      return sAchievementCriteriaStore.LookupEntry(criteria);
  }
  
  void CharacterDatabaseCleaner::CleanCharacterAchievementProgress()
  {
      CheckUnique("criteria", "character_achievement_progress", &AchievementProgressCheck);
  }
  
  bool CharacterDatabaseCleaner::SkillCheck(uint32 skill)
  {
      return sSkillLineStore.LookupEntry(skill);
  }
  
  void CharacterDatabaseCleaner::CleanCharacterSkills()
  {
      CheckUnique("skill", "character_skills", &SkillCheck);
  }
  
  bool CharacterDatabaseCleaner::SpellCheck(uint32 spell_id)
  {
      return sSpellStore.LookupEntry(spell_id) && !GetTalentSpellPos(spell_id);
  }
  
  void CharacterDatabaseCleaner::CleanCharacterSpell()
  {
      CheckUnique("spell", "character_spell", &SpellCheck);
  }
  
  bool CharacterDatabaseCleaner::TalentCheck(uint32 talent_id)
  {
      TalentEntry const* talentInfo = sTalentStore.LookupEntry(talent_id);
      if (!talentInfo)
          return false;
  
      return sTalentTabStore.LookupEntry(talentInfo->TalentTab);
  }
  
  void CharacterDatabaseCleaner::CleanCharacterTalent()
  {
      CharacterDatabase.DirectPExecute("DELETE FROM character_talent WHERE spec > %u OR current_rank > %u", MAX_TALENT_SPEC_COUNT, MAX_TALENT_RANK);
  
      CheckUnique("talent_id", "character_talent", &TalentCheck);
  }
  