MFFS Controller for devillwithin

-- * configuration
local usernamesToAccept = {
    "yourUserame",
    "otherUserame",
    "LBPHacker"
}
local innerMonitorName = "monitor_0"
local outerDetectorName = "playerDetector_0"
local redstoneOutput = "bottom"

-- * not my style, but wrap up the monitor (I prefer peripheral.call)
local monitor = peripheral.wrap(innerMonitorName)

-- * updates the redstone output and the monitor
local toggleOutput = function()
    local current = not rs.getOutput(redstoneOutput)
    rs.setOutput(redstoneOutput, current) -- * toggles the output
    monitor.setBackgroundColor(current and colors.lime or colors.red)
    monitor.clear()
    monitor.setCursorPos(2, 3)
    monitor.write(current and "MFFS: [ON]| OFF " or "MFFS:  ON |[OFF]")
end

-- * checks for access
local hasAccess = function(username)
    local access = false
    for uix = 1, #usernamesToAccept do access = usernamesToAccept[uix] == username or access end -- * gives access sooner or later if the username is in the table 'usernamesToAccept'
    return access
end

monitor.setTextColor(colors.white)
rs.setOutput(redstoneOutput, false) -- * change false to true if you want the MFFS to be off by default
toggleOutput()

-- * endless loop
while true do
    local eventData = {os.pullEvent()} -- * puts the event data into a table
    if eventData[1] == "monitor_touch" or eventData[1] == "player" and hasAccess(eventData[2]) then
        -- * nothing is on the monitor apart from the button
        --   which toggles the MFFS, so no need of fancy button APIs
        toggleOutput()
    end
end