Untitled

-- rest of config (item prices) is under function, paste there your items list from npc
local config = {
    price_percent = 50, -- how many % of shop price player receive when sell by 'item seller'
    cash_to_bank = true -- send money to bank, not add to player BP
}

local shopItems = {}

function onUse(player, item, fromPosition, target, toPosition, isHotkey)
    if toPosition.x ~= 65535 and getDistanceBetween(player:getPosition(), toPosition) > 1 then
        player:sendTextMessage(MESSAGE_INFO_DESCR, 'This item is too far away.')
        return true
    end

    local targetTile = Tile(toPosition)
    if targetTile then
        -- this is to prevent selling item that lays in house doors
        local targetHouse = targetTile:getHouse()
        if targetHouse then
            -- this blocks only selling items laying on house floor
            -- if player open BP that lays on house floor, he can sell items inside it
            player:sendTextMessage(MESSAGE_INFO_DESCR, 'You cannot sell items in house.')
            return true
        end
    end

    local itemEx = Item(target.uid)
    if not itemEx then
        player:sendTextMessage(MESSAGE_INFO_DESCR, 'This is not an item.')
        return true
    end

    if itemEx:getUniqueId() < 65535 or itemEx:getActionId() > 0 then
        player:sendTextMessage(MESSAGE_INFO_DESCR, 'You cannot sell quest item.')
        return true
    end

    if not shopItems[itemEx.itemid] then
        player:sendTextMessage(MESSAGE_INFO_DESCR, 'This is not sellable item.')
        return true
    end

    local itemCount = 1
    local itemType = ItemType(itemEx.itemid)
    if itemType:isStackable() then
        itemCount = itemEx.type
    end

    local itemName = itemEx:getName()
    local itemValue = math.ceil(shopItems[itemEx.itemid] * itemCount / 100 * config.price_percent)
    if itemValue > 0 then
        itemEx:getPosition():sendMagicEffect(CONST_ME_GIFT_WRAPS)
        itemEx:remove()

        local message = 'You sold ' .. itemCount .. ' ' .. itemName .. ' for ' .. itemValue .. ' gold coins.'
        if config.cash_to_bank then
            player:setStorageValue(STORAGE-ID, math.max(1,player:getStorageValue(STORAGE-ID)+itemValue))
            message = message .. ' Money was added to your cash pot.'
        else
            player:addMoney(itemValue)
        end
        player:sendTextMessage(MESSAGE_INFO_DESCR, message)
    else
        player:sendTextMessage(MESSAGE_INFO_DESCR, itemName .. ' is worthless.')
    end

    return true
end

local shopModule = {}
function shopModule:addBuyableItemContainer()
end
function shopModule:addBuyableItem()
end
function shopModule:addSellableItem(names, itemid, cost, realName)
    shopItems[itemid] = cost
end

function shopModule:parseList(data)
    for item in string.gmatch(data, "[^;]+") do
        local i = 1
        local itemid = -1
        local cost = 0
        for temp in string.gmatch(item, "[^,]+") do
            if i == 2 then
                itemid = tonumber(temp)
            elseif i == 3 then
                cost = tonumber(temp)
            end
            i = i + 1
        end

        shopItems[itemid] = cost
    end
end

-- here paste list of items from NPC lua file
shopModule:addSellableItem({ 'poison arrow' }, 2545, 5, 'poison arrow')
shopModule:addSellableItem({ 'hota' }, 2342, 500, 'helmet of the ancients')

-- here paste list from .xml file
shopModule:parseList('crossbow,2455,150;bow,2456,130')
shopModule:parseList('knight armor, 2476, 10000')