#!/usr/bin/lua5.4

local board_file = "/var/nex/board"
local max_line_length, max_lines = 255, 99

local file, err = io.open(board_file, "a")
if not file then
    io.stderr:write("Could not open " .. board_file .. ": " .. err .. "\n")
    return
end

file:write("\n----------------------------------------------------------------------\n")
file:write("NEXT ONE " .. os.date("%a %b %d %H:%M:%S %Y CEST") .. "\n")

local line_count = 0
while line_count < max_lines do
    local line = io.read("*l")
    if not line then break end
    line = line:gsub("\r", "")

    if #line > max_line_length then
        print("Line too long. Keep it under " .. max_line_length .. " characters.")
    elseif line == "." then
        break
    else
        file:write(line .. "\n")
        line_count = line_count + 1
    end
end

file:close()
print("Thank you hero! We are done here. Text should be at the board now.")