Peripheral Helper Program

pversion = "0.1"

function sortedList()

    term.clear()
    p = peripheral.getNames() -- load a list of peripherals into a table
    table.sort(p)

    term.clear()
    term.setCursorPos(1,1)

    for i=1, #p do
        term.write(i .. ". " .. p[i])
        x,y = term.getCursorPos()
        term.setCursorPos(1, (y+1))
        sleep(0.2)
    end

    print("Number of peripherals: " .. #p)
    term.write("(M)ain Menu or (Q)uit: ")

    sorted_input = read()
    sorted_input = string.upper(sorted_input)

    if sorted_input == "M" then
        mainMenu()
    elseif sorted_input == "Q" then
        error("Exited")
    else
        mainMenu()
    end

end

function pSearch()

    print("Search criteria / (M)ain menu: ")

    search_input = string.upper(read())

    if search_input == "M" then
        mainMenu()
    else
        p = peripheral.getNames()
        for i=1, #p do
            if string.find(p[i], search_input) then
                print(p[i])
            end
        end
    end

    print("(M)ain Menu or (Q)uit: ")
    next_input = string.upper(read())

    if next_input == "M" then
        mainMenu()
    elseif next_input == "Q" then
        error("Exited")
    else
        mainMenu()
    end
end

function mainMenu ()
    term.clear()
    term.setCursorPos(1,1)
    print("Peripheral Helper Program v" .. pversion)
    print("Make a selection :")
    print("Sorted [l]ist of connected peripherals")
    print("[S]earch for a specific peripheral")
    print("[Q]uit")
    term.write(": ")

    user_input = read()
    user_input = string.upper(user_input)

    if user_input == "L" then
        sortedList()
    elseif user_input == "S" then
        pSearch()
    elseif user_input == "Q" then
        error("Exited")
    else
        mainMenu()
    end
end

while true do

    mainMenu()

end