module GithubDownloader

# File lib/github_downloader.rb, line 32
def self.from_cmdline(args)
  show_error 'no options specified, try with --help and see all the available options' unless ARGV.size > 0

  options = Parser.new do |p|
    p.banner = 'GitHub Repo Downloader'
    p.version = VERSION
    p.option :username, 'Your GitHub user', :default => '', :short => 'u'
    p.option :password, 'Your GitHub password', :default => '', :short => 'p'
    p.option :organization, 'GitHub Organization (optional)', :default => '', :short => 'g'
    p.option :from, 'GitHub user from which we want to download (optional)', :default => '', :short => 'r'
    p.option :output, 'Output directory', :default => '.', :short => 'o'
  end.process!

  show_error 'no user specified, please check --help to see all available options' if options[:username].blank?
  show_error 'no password specified, please check --help to see all available options' if options[:password].blank?
  if (options[:organization].blank? && options[:from].blank?) || (!options[:organization].blank? && !options[:from].blank?)
    show_error 'either an organization or an user must be provided to download repositories, not both or none'
  end

  output_dir = options[:output]
  user = options[:username]
  pass = options[:password]
  organization = options[:organization]
  user_repo = options[:from]

  github = Github.new basic_auth: "#{user}:#{pass}" do |config|
    config.org = organization unless organization.blank?
    config.auto_pagination = true
  end

  FileUtils.makedirs output_dir if output_dir != '.'

# Either chose repos from an organization or an user
  all_repos = github.repos.all unless organization.blank?
  all_repos = github.repos.list user: user_repo unless user_repo.blank?

  all_repos.each do |repo|
    print "Downloading archive for #{repo.full_name}... "
    Dir.chdir output_dir do
      run "curl -i -u #{user}:#{pass} -o #{repo.name}-master-archived.zip -L #{repo.html_url}/archive/master.zip"
    end
  end
end

# File lib/github_downloader.rb, line 21
def self.run(command)
  output = `#{command} 2> github_downloader_error.log`
  if $?.exitstatus > 0
    print "Failed!\n".red
    puts output
    exit(-1)
  else
    print "Done!\n".green
  end
end

# File lib/github_downloader.rb, line 15
def self.show_error(error_string)
  puts 'Error!'.red
  puts error_string
  exit
end