[ComputerCraft] MonitorAPI

local monitor_screen = {}
local monitors = {}

function loadSettings()
    if (fs.exists("/config/monitorScreen.conf")) then
        local h = fs.open("/config/monitorScreen.conf", "r")
        monitor_screen = textutils.unserialize(h.readAll())
        h.close()
    end

    return
end

function saveSettings()
    local h = fs.open("/config/monitorScreen.conf", "w")
    h.write(textutils.serialize(monitor_screen))
    h.close()
end

function updateMonitors()
    monitor_screen = {}
    monitors = {}

    loadSettings()

    local names = peripheral.getNames()
    local i = 1
    for _, v in pairs(names) do
        local monitor = tostring(v)
        if string.find(monitor, "monitor_") then
            table.insert(monitors, monitor)
            if (monitor_screen[monitor] == nil) then
                monitor_screen[monitor] = i
            end
            i = i + 1
        end
    end

    saveSettings()
end

function getList()
    return monitor_screen
end

function setList(monitorList)
    monitor_screen = monitorList
    saveSettings()
end

function getMonitors()
    return monitors
end

function getMonitor(ID)
    results = {}
    for monitor, mID in pairs(monitor_screen) do
        if (mID == ID) then
            table.insert(results, monitor)
        end
    end

    return results
end

function getMonitorID(monitor)
    return monitor_screen[monitor]
end

function setMonitorID(monitor, ID)
    monitor_screen[monitor] = ID
    saveSettings()
end

updateMonitors()