test for usable items

itemuse.lua

require('luau')
require('pack')
bit = require('bit')
extdata = require 'extdata'

function print_item_packet(id, target_index, item_index, bag)
    local targ = windower.ffxi.get_mob_by_index(target_index)
    local item = windower.ffxi.get_items(bag, item_index)
    local i_res = res.items[item.id]
    local ext = extdata.decode(item)
    
    local str = 'Unhandled'

    if ext.type == 'Enchanted Equipment' then
        if item.status == 5 and ext.usable then -- looks like the items target flags are checked here
            -- 0x037
            str = '0x37'
        end
    elseif item.status == 0 then
        if bit.band(targ.spawn_type, 2) == 2 then
            -- 0x036
            str = '0x36'
        else
            -- 0x037
            str = '0x37'
        end
    end
    
    windower.add_to_chat(207, '0x%2X | %s | item_type: %d %s | item_name: %s | spawn_type: %d':format(id, str, i_res.type, ext.type, i_res.name, targ.spawn_type))
end

windower.register_event('outgoing chunk', function(id, data, modified, injected, blocked)
    if id == 0x036 then
        print_item_packet(id, data:unpack('H', 59), data:byte(49), 0)
    elseif id == 0x037 then
        print_item_packet(id, data:unpack('H', 13), data:byte(15), data:byte(17))
    end
end)