src/game/SkillDiscovery.cpp

   1 /*
   2  * Copyright (C) 2005-2008 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "Database/DatabaseEnv.h"
  20 #include "Log.h"
  21 #include "ProgressBar.h"
  22 #include "Policies/SingletonImp.h"
  23 #include "ObjectAccessor.h"
  24 #include "World.h"
  25 #include "Util.h"
  26 #include "SkillDiscovery.h"
  27 #include "SpellMgr.h"
  28 #include <map>
  29
  30 struct SkillDiscoveryEntry
  31 {
  32     uint32  spellId;
  33     float   chance;
  34
  35     SkillDiscoveryEntry()
  36         : spellId(0), chance(0) {}
  37
  38     SkillDiscoveryEntry(uint16 _spellId, float _chance)
  39         : spellId(_spellId), chance(_chance) {}
  40 };
  41
  42 typedef std::list<SkillDiscoveryEntry> SkillDiscoveryList;
  43 typedef UNORDERED_MAP<int32, SkillDiscoveryList> SkillDiscoveryMap;
  44
  45 static SkillDiscoveryMap SkillDiscoveryStore;
  46
  47 void LoadSkillDiscoveryTable()
  48 {
  49
  50     SkillDiscoveryStore.clear();                            // need for reload
  51
  52     uint32 count = 0;
  53
  54     //                                                 0        1         2
  55     QueryResult *result = WorldDatabase.Query("SELECT spellId, reqSpell, chance FROM skill_discovery_template");
  56
  57     if (result)
  58     {
  59         barGoLink bar(result->GetRowCount());
  60
  61         std::ostringstream ssNonDiscoverableEntries;
  62
  63         do
  64         {
  65             Field *fields = result->Fetch();
  66             bar.step();
  67
  68             uint32 spellId         = fields[0].GetUInt32();
  69             int32  reqSkillOrSpell = fields[1].GetInt32();
  70             float  chance          = fields[2].GetFloat();
  71
  72             if( chance <= 0 )                               // chance
  73             {
  74                 ssNonDiscoverableEntries << "spellId = " << spellId << " reqSkillOrSpell = " << reqSkillOrSpell << " chance = " << chance << "\n";
  75                 continue;
  76             }
  77
  78             if(reqSkillOrSpell > 0)                         // spell case
  79             {
  80                 SpellEntry const* spellEntry = sSpellStore.LookupEntry(reqSkillOrSpell);
  81                 if( !spellEntry )
  82                 {
  83                     sLog.outErrorDb("Spell (ID: %u) have not existed spell (ID: %i) in `reqSpell` field in `skill_discovery_template` table",spellId,reqSkillOrSpell);
  84                     continue;
  85                 }
  86
  87                 if( spellEntry->Mechanic != MECHANIC_DISCOVERY )
  88                 {
  89                     sLog.outErrorDb("Spell (ID: %u) not have have MECHANIC_DISCOVERY (28) value in Mechanic field in spell.dbc but listed in `skill_discovery_template` table",spellId);
  90                     continue;
  91                 }
  92
  93                 SkillDiscoveryStore[reqSkillOrSpell].push_back( SkillDiscoveryEntry(spellId, chance) );
  94             }
  95             else if( reqSkillOrSpell == 0 )                 // skill case
  96             {
  97                 SkillLineAbilityMap::const_iterator lower = spellmgr.GetBeginSkillLineAbilityMap(spellId);
  98                 SkillLineAbilityMap::const_iterator upper = spellmgr.GetEndSkillLineAbilityMap(spellId);
  99
 100                 if(lower==upper)
 101                 {
 102                     sLog.outErrorDb("Spell (ID: %u) not listed in `SkillLineAbility.dbc` but listed with `reqSpell`=0 in `skill_discovery_template` table",spellId);
 103                     continue;
 104                 }
 105
 106                 for(SkillLineAbilityMap::const_iterator _spell_idx = lower; _spell_idx != upper; ++_spell_idx)
 107                 {
 108                     SkillDiscoveryStore[-int32(_spell_idx->second->skillId)].push_back( SkillDiscoveryEntry(spellId, chance) );
 109                 }
 110             }
 111             else
 112             {
 113                 sLog.outErrorDb("Spell (ID: %u) have negative value in `reqSpell` field in `skill_discovery_template` table",spellId);
 114                 continue;
 115             }
 116             ++count;
 117         } while (result->NextRow());
 118
 119         delete result;
 120
 121         sLog.outString();
 122         sLog.outString( ">> Loaded %u skill discovery definitions", count );
 123         if(!ssNonDiscoverableEntries.str().empty())
 124             sLog.outErrorDb("Some items can't be successfully discovered: have in chance field value < 0.000001 in `skill_discovery_template` DB table . List:\n%s",ssNonDiscoverableEntries.str().c_str());
 125     }
 126     else
 127     {
 128         sLog.outString();
 129         sLog.outString( ">> Loaded 0 skill discovery definitions. DB table `skill_discovery_template` is empty." );
 130     }
 131 }
 132
 133 uint32 GetSkillDiscoverySpell(uint32 skillId, uint32 spellId, Player* player)
 134 {
 135     // check spell case
 136     SkillDiscoveryMap::iterator tab = SkillDiscoveryStore.find(spellId);
 137
 138     if(tab != SkillDiscoveryStore.end())
 139     {
 140         for(SkillDiscoveryList::iterator item_iter = tab->second.begin(); item_iter != tab->second.end(); ++item_iter)
 141         {
 142             if( roll_chance_f(item_iter->chance * sWorld.getRate(RATE_SKILL_DISCOVERY))
 143                 && !player->HasSpell(item_iter->spellId) )
 144                 return item_iter->spellId;
 145         }
 146
 147         return 0;
 148     }
 149
 150     // check skill line case
 151     tab = SkillDiscoveryStore.find(-(int32)skillId);
 152     if(tab != SkillDiscoveryStore.end())
 153     {
 154         for(SkillDiscoveryList::iterator item_iter = tab->second.begin(); item_iter != tab->second.end(); ++item_iter)
 155         {
 156             if( roll_chance_f(item_iter->chance * sWorld.getRate(RATE_SKILL_DISCOVERY))
 157                 && !player->HasSpell(item_iter->spellId) )
 158                 return item_iter->spellId;
 159         }
 160
 161         return 0;
 162     }
 163
 164     return 0;
 165 }