public static void BuySpell(this NPC trainer, Character chr, SpellId spellEntryId)
{
if (!trainer.CheckTrainerCanTrain(chr))
{
return;
}
TrainerSpellEntry spellEntry = trainer.TrainerEntry.GetSpellEntry(spellEntryId);
if (spellEntry == null || !trainer.CheckBuySpellConditions(chr, spellEntry))
{
return;
}
chr.SubtractMoney(spellEntry.GetDiscountedCost(chr, trainer));
WCell.RealmServer.Handlers.NPCHandler.SendTrainerBuySucceeded((IPacketReceiver)chr.Client, trainer,
spellEntry);
SpellHandler.SendVisual((WorldObject)trainer, 179U);
if (spellEntry.Spell.IsTeachSpell)
{
trainer.SpellCast.Trigger(spellEntry.Spell, new WorldObject[1]
{
(WorldObject)chr
});
}
else if (chr.PowerType == PowerType.Mana || spellEntry.Spell.PreviousRank == null)
{
chr.Spells.AddSpell(spellEntry.Spell);
trainer.TalkToTrainer(chr);
}
else
{
chr.Spells.Replace(spellEntry.Spell.PreviousRank, spellEntry.Spell);
}
}
public static bool CanLearn(this Character chr, TrainerSpellEntry trainerSpell)
{
if (trainerSpell.Spell == null)
{
return(false);
}
if (trainerSpell.GetTrainerSpellState(chr) != TrainerSpellState.Available)
{
return(false);
}
return(true);
}
private static bool CheckBuySpellConditions(this NPC trainer, Character curChar, TrainerSpellEntry trainerSpell)
{
if (curChar.CanLearn(trainerSpell))
{
return(curChar.Money >= trainerSpell.GetDiscountedCost(curChar, trainer));
}
return(false);
}
public static bool CanLearn(this Character chr, TrainerSpellEntry trainerSpell)
{
return(trainerSpell.Spell != null && trainerSpell.GetTrainerSpellState(chr) == TrainerSpellState.Available);
}
public static void SendTrainerBuySucceeded(IPacketReceiver client, NPC trainer, TrainerSpellEntry spell)
{
using (var packet = new RealmPacketOut(RealmServerOpCode.SMSG_TRAINER_BUY_SUCCEEDED, 8 + 4))
{
packet.Write(trainer.EntityId);
packet.Write(spell.Spell.Id);
client.Send(packet);
}
}
