bb

local args = {...}

local enable_sides

local config_file = fs.open("/branch_config.cfg", "r")
if config_file then
    local sides = textutils.unserialise(config_file.readAll())
    if sides then
        enable_sides = sides
    else
        print("Malformed config file!")
    end
else
    print("No config file!")
end

if #args < 1 then
    error("Usage: branch <station_name>")
end

local station_name = args[1]
print("Starting branch as station "..station_name)

local modem = peripheral.find("modem")

if not modem then
    error("No modem found!")
end

modem.open(15) --listen for feeders on channel 15

os.startTimer(0.05)

modem.transmit(43, 15, "feeder " .. os.getComputerID() .. " " .. station_name)

while true do
    local event, ev1, ev2, ev3, ev4, ev5 = os.pullEvent()
    if event == "modem_message" then
        if ev4 == "hub_boot" or ev4 == "hub_scan" then
            modem.transmit(43, 15, "feeder " .. os.getComputerID() .. " " .. station_name)
        else
            local words = {}
            for word in ev4:gmatch("%S+") do
                table.insert(words, word)
            end
            if tonumber(words[1]) == os.getComputerID() then
                if words[2] == "command" then
                    --handle a command
                    if words[3] == "redstone" then
                        redstone.setOutput(words[4], words[5] == "on")
                    end
                elseif words[2] == "ping" then
                    --return a ping
                    modem.transmit(43, 15, "ping_reply " .. os.getComputerID())
                elseif words[2] == "enable" then
                    for k, v in pairs(enable_sides) do
                        redstone.setOutput(k, v == "true")
                    end
                elseif words[2] == "disable" then
                    for k, v in pairs(enable_sides) do
                        redstone.setOutput(k, v ~= "true")
                    end
                end
            end
        end
    elseif event == "timer" then
        os.startTimer(0.05)
    else
        print(event)
    end
end