elevators

MASTER_CHANNEL = 5452
ELEVATOR_CHANNEL = 47883
LABEL = os.getComputerLabel()
REDSTONE = true

modem = peripheral.find("modem")
modem.open(ELEVATOR_CHANNEL)

function splitString(str, delimiter)
    local result = {}
    local startIndex = 1
    local delimiterIndex = string.find(str, delimiter, startIndex, true)
    while delimiterIndex do
        local part = string.sub(str, startIndex, delimiterIndex - 1)
        table.insert(result, part)
        startIndex = delimiterIndex + 1
        delimiterIndex = string.find(str, delimiter, startIndex, true)
    end
    local lastPart = string.sub(str, startIndex)
    table.insert(result, lastPart)
    return result
end


function jobs(calledTask)
    if calledTask == "call" then
        if REDSTONE == true then
            REDSTONE = false
        else
            REDSTONE = true
        end
    end
end


while true do
    if REDSTONE == true then
        redstone.setOutput("bottom", true)
    else
        redstone.setOutput("bottom", false)
    end
    local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")
    local transmission = message
    local delimiter = " "
    local result = splitString(transmission, delimiter)
    if result[2] == LABEL then
        jobs(result[1])
    end
end