morse

local alphabet = {
    ["a"] = ".-",
    ["b"] = "-...",
    ["c"] = "-.-.",
    ["d"] = "-..",
    ["e"] = ".",
    ["f"] = "..-.",
    ["g"] = "--.",
    ["h"] = "....",
    ["i"] = "..",
    ["j"] = ".---",
    ["k"] = "-.-",
    ["l"] = ".-..",
    ["m"] = "--",
    ["n"] = "-.",
    ["o"] = "---",
    ["p"] = ".--.",
    ["q"] = "--.-",
    ["r"] = ".-.",
    ["s"] = "...",
    ["t"] = "-",
    ["u"] = "..-",
    ["v"] = "...-",
    ["w"] = ".--",
    ["x"] = "-.--",
    ["y"] = "-.--",
    ["z"] = "--.."
}

function table.hasKey(table, key)
    for k, _ in pairs(table) do
      if k == key then
        return true
      end
    end
    return false
  end

function convertTxtToMorse(text)
    local result = {}

    for letter in string.lower(text):gmatch(".") do
        if (letter == " ") then
            table.insert(result, " ")
            print("space")
        elseif (not table.hasKey(alphabet, letter)) then
            print("not a letter")
        else
        table.insert(result, alphabet[letter])
        print(alphabet[letter])
        end
    end

    return result
end

convertTxtToMorse("test text 1234")