Command receiver

--Code for computer which receives destinations
--It then outputs redstone on a certain side and activates a command block

receive_channel = 3
display_transmit_channel = 4
last_pressed = 0

-- Start modem
local modem = peripheral.wrap("bottom")
modem.open(receive_channel)

-- Wrap command block
local commandBlock = peripheral.wrap("top")

function run_command(side)
    if side == 1 then commandBlock.setCommand("tp @p[r=5] -1321 64 528")
    elseif side == 2 then commandBlock.setCommand("tp @p[r=5] -123 64 53")
    elseif side == 3 then commandBlock.setCommand("tp @p[r=5] -1493 63 644")
    elseif side == 4 then commandBlock.setCommand("tp @p[r=5] -1497 63 640")
    elseif side == 0 then print("No destination set")
    else print("Side is wrong format! ", side)
    end

    commandBlock.runCommand()
end

function pressure_plate()
    -- Wait for pressure plate input on front
    -- Upon receiving it, send a redstone_pulse

    while redstone.getInput("left") == false do
        sleep(0.1)
    end
    run_command(last_pressed)
    print("tp to destination "..last_pressed)
end

function modem_wait()
    local event, modemSide, senderChannel, replyChannel,
        message, senderDistance = os.pullEvent("modem_message")

    last_pressed = tonumber(message)
    disp_print(last_pressed)
    print(last_pressed)
end

function disp_print(text)
    modem.transmit(display_transmit_channel, 1, text)
end

while true do
    parallel.waitForAny(pressure_plate, modem_wait)
    sleep(0.1)
end