Downloader

local internet = require("internet")
local fs = require("filesystem")

local downloader = {}

function downloader.downloadFile(url, savePath)
  local response = downloader._tryDownloadFile(url)

  downloader._saveDowloadFile(response, savePath)
end

function downloader._tryDownloadFile(url)
  local result, response = pcall(internet.request, url)

  if result == true then
    return response
  else
    error("Failed download file!")
  end
end

function downloader._saveDowloadFile(response, savePath)
  local file = downloader._prepareFileToWrite(savePath)

  for chunk in response do
    string.gsub(chunk, "\r\n", "\n")
    file:write(chunk)
  end

  file:close()
end

function downloader._prepareFileToWrite(path)
  downloader._deleteFileIfItExist(path)
  downloader._createFoldersIfItIsNessesary(path)

  local file, errorInfo = io.open(path, "w")
  downloader._throwErrorIfOpeningFileForWritingIsFailed(file, errorInfo)

  return file
end

function downloader._deleteFileIfItExist(path)
  if fs.exists(path) then
    fs.remove(path)
  end
end

function downloader._createFoldersIfItIsNessesary(path)
  local pathWithoutName = string.gsub(path, fs.name(path), " ")

  fs.makeDirectory(pathWithoutName)
end


function downloader._throwErrorIfOpeningFileForWritingIsFailed(file, errorInfo)
  if not file then
    error("Failed opening file for writing! " .. errorInfo)
  end
end

downloader.downloadFile("https://raw.githubusercontent.com/AmonDeShir/AmonLuaApi/master/console/menu.lua", "/home/edit/test.lua")