[gravicard] databaseBackup

local modem = peripheral.wrap("top")
modem.open(69)

local dbbu = {}

local function waitForBackup()
    while true do
        local _, side, freq, rfreq, database = os.pullEvent('modem_message')
        dbbu = database
        print("Database received from main database.")
    end
end


local function sendBackupBack()
    while true do
        local input = read()
        if input == "sendBackup" then
            modem.transmit(69, 69, dbbu)
            print("Backup send to main database.")
        elseif input == "getDatabase" then
            modem.transmit(69, 69, "askForDB")
            local _, side, freq, rfreq, database = os.pullEvent('modem_message')
            dbbu = database
            print("Database received from main database.")
        end
    end
end

parallel.waitForAll(waitForBackup, sendBackupBack)
print("[EMERGENCY] BACKUP DATABASE OFFLINE.")

modem.close()