-- Callback onBuy() function. If you wish, you can change certain Npc to use your onBuy().
function ShopModule:callbackOnBuy(cid, itemid, subType, amount, ignoreCap, inBackpacks)
local shopItem = nil
for _, item in ipairs(self.npcHandler.shopItems) do
if(item.id == itemid and item.subType == subType) then
shopItem = item
break
end
end
if(shopItem == nil) then
return false
end
if(shopItem.buy == -1) then
print('[Warning - ' .. getCreatureName(getNpcId()) .. '] NpcSystem:', 'ShopModule.onBuy - Attempt to purchase an item which only sellable')
return false
end
if(amount <= 0) then
print('[Warning - ' .. getCreatureName(getNpcId()) .. '] NpcSystem:', 'ShopModule.onBuy - Attempt to purchase ' .. amount .. ' items')
return false
end
local backpack, totalCost = 1988, amount * shopItem.buy
if(inBackpacks) then
totalCost = totalCost + (math.max(1, math.floor(amount / getContainerCapById(backpack))) * 20)
end
local parseInfo = {
[TAG_PLAYERNAME] = getPlayerName(cid),
[TAG_ITEMCOUNT] = amount,
[TAG_TOTALCOST] = totalCost,
[TAG_ITEMNAME] = shopItem.name
}
if(getPlayerMoney(cid) < totalCost) then
local msg = self.npcHandler:getMessage(MESSAGE_NEEDMONEY)
doPlayerSendCancel(cid, self.npcHandler:parseMessage(msg, parseInfo))
return false
end
local subType = shopItem.subType or 1
local a, b = doNpcSellItem(cid, itemid, amount, subType, ignoreCap, inBackpacks, backpack)
if(a < amount) then
local msgId = MESSAGE_NEEDMORESPACE
if(a == 0) then
msgId = MESSAGE_NEEDSPACE
end
local msg = self.npcHandler:getMessage(msgId)
parseInfo[TAG_ITEMCOUNT] = a
doPlayerSendCancel(cid, self.npcHandler:parseMessage(msg, parseInfo))
if(NPCHANDLER_CONVBEHAVIOR ~= CONVERSATION_DEFAULT) then
self.npcHandler.talkStart[cid] = os.time()
else
self.npcHandler.talkStart = os.time()
end
if(a > 0) then
doPlayerRemoveMoney(cid, ((a * shopItem.buy) + (b * 20)))
return true
end
return false
end
local msg = self.npcHandler:getMessage(MESSAGE_BOUGHT)
doPlayerSendTextMessage(cid, MESSAGE_INFO_DESCR, self.npcHandler:parseMessage(msg, parseInfo))
doPlayerRemoveMoney(cid, totalCost)
if(NPCHANDLER_CONVBEHAVIOR ~= CONVERSATION_DEFAULT) then
self.npcHandler.talkStart[cid] = os.time()
else
self.npcHandler.talkStart = os.time()
end
return true
end