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How Looks commands in game:
!autoloot add, itemId or name
!autoloot remove, itemId or name
!autoloot show
!autoloot clear

Add code to data/global.lua

-- AutoLoot config
    AUTO_LOOT_MAX_ITEMS = 5

    -- Reserved storage
    AUTOLOOT_STORAGE_START = 10000
    AUTOLOOT_STORAGE_END = AUTOLOOT_STORAGE_START + AUTO_LOOT_MAX_ITEMS
-- AutoLoot config end

Add code to talkactions/talkactions.xml

<talkaction words="!autoloot" separator=" " script="autoloot.lua"/>

Make file in talkactions/scripts called autoloot.lua and paste

function onSay(player, words, param)
    local split = param:split(",")

    local action = split[1]
    if action == "add" then
        local item = split[2]:gsub("%s+", "", 1)
        local itemType = ItemType(item)
        if itemType:getId() == 0 then
            itemType = ItemType(tonumber(item))
            if itemType:getId() == 0 then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "There is no item with that id or name.")
                return false
            end
        end

        local itemName = tonumber(split[2]) and itemType:getName() or item
        local size = 0
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            local storage = player:getStorageValue(i)
            if size == AUTO_LOOT_MAX_ITEMS then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "The list is full, please remove from the list to make some room.")
                break
            end

            if storage == itemType:getId() then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." is already in the list.")
                break
            end

            if storage <= 0 then
                player:setStorageValue(i, itemType:getId())
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." has been added to the list.")
                break
            end

            size = size + 1
        end
    elseif action == "remove" then
        local item = split[2]:gsub("%s+", "", 1)
        local itemType = ItemType(item)
        if itemType:getId() == 0 then
            itemType = ItemType(tonumber(item))
            if itemType:getId() == 0 then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "There is no item with that id or name.")
                return false
            end
        end

        local itemName = tonumber(split[2]) and itemType:getName() or item
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            if player:getStorageValue(i) == itemType:getId() then
                player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." has been removed from the list.")
                player:setStorageValue(i, 0)
                return false
            end
        end

        player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, itemName .." was not founded in the list.")
    elseif action == "show" then
        local text = "-- Auto Loot List --\n"
        local count = 1
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            local storage = player:getStorageValue(i)
            if storage > 0 then
                text = string.format("%s%d. %s\n", text, count, ItemType(storage):getName())
                count = count + 1
            end
        end

        if text == "" then
            text = "Empty"
        end

        player:showTextDialog(1950, text, false)
    elseif action == "clear" then
        for i = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
            player:setStorageValue(i, 0)
        end

        player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "The autoloot list has been cleared.")
    else
        player:sendTextMessage(MESSAGE_STATUS_CONSOLE_BLUE, "Use the commands: !autoloot {add, remove, show, clear}")
    end

    return false
end

Add to creaturescripts/creaturescripts.xml

<event type="kill" name="AutoLoot" script="autoloot.lua" />

Create new file in creaturescripts/scripts called autoloot.lua and paste

local function scanContainer(cid, position)
    local player = Player(cid)
    if not player then
        return
    end

    local corpse = Tile(position):getTopDownItem()
    if not corpse then
        return
    end

    if corpse:getType():isCorpse() and corpse:getAttribute(ITEM_ATTRIBUTE_CORPSEOWNER) == cid then
        for a = corpse:getSize() - 1, 0, -1 do
            local containerItem = corpse:getItem(a)
            if containerItem then
                for b = AUTOLOOT_STORAGE_START, AUTOLOOT_STORAGE_END do
                    if player:getStorageValue(b) == containerItem:getId() then
                        containerItem:moveTo(player)
                    end
                end
            end
        end
    end
end

function onKill(player, target)
    if not target:isMonster() then
        return true
    end

    addEvent(scanContainer, 100, player:getId(), target:getPosition())
    return true
end

Go to creaturescripts/scripts/login.lua and save

player:registerEvent("AutoLoot")