[LIBRARY] Card Worker

local cmp = require("component")
local srl = require("serialization")
local fs = require("filesystem")
local sh = require("shell")
local unicode = require("unicode")
local term = require("term")
local event = require("event")

card = {}

function card.read()
    local data = {}
    if not cmp.isAvailable("OSMagReader") then
        return "Reader not found"
    end
    local _, _, _, data = event.pull("magData")
    data = srl.unserialize(data)
    return data
end

function card.write(filename, cardname)
    if not cmp.isAvailable("OSCardWriter") then
        return "Writer not found"
    end
    local writer = cmp.OSCardWriter
    local dataRAW = {}
    for line in pairs(filename) do
        table.insert(dataRAW, line)
    end
    local data = srl.serialize(dataRAW)
    if unicode.len(data) > 128 then
        return "File too big"
    end
    if cardname then
        writer.write(data, cardname)
        return true
    else
        writer.write(data)
        return true
    end
end

return card