cli.rb

require_relative 'settings'
require_relative 'os'
require_relative 'git_info'
require_relative 'email_formatter'
require_relative 'sanitizer'

# User interface and what opens the mailto link
class CLI
  def self.run
    cli = new(
      Settings.default_allowed,
      Settings.default_special,
      Settings.default_target_branch_is_master,
      false
    )
    cli.check_if_windows
    cli.check_if_in_git_repo
    cli.check_if_in_master
    cli.debug_output
    cli.open_mailto_link
  end

  def initialize(
    default_allowed,
    default_special,
    default_target_branch_is_master,
    debug
  )
    @default_allowed = default_allowed
    @default_special = default_special
    @default_target_branch_is_master = default_target_branch_is_master
    @debug = debug
  end

  attr_reader :default_allowed, :default_special,
    :default_target_branch_is_master, :debug

  def check_if_windows
    if OS.windows?
      $stderr.puts 'Script does not support Windows.'
      exit 1
    end
  end

  def check_if_in_git_repo
    unless GitInfo.currently_in_git_repo?
      $stderr.puts 'Not in a git repository.'
      exit 1
    end
  end

  def check_if_in_master
    if GitInfo.master?
      $stderr.puts "You're currently in the 'master' branch."
      $stderr.puts "You can't make a deploy request for this branch."
      exit 1
    end
  end

  def debug_output
    return unless debug

    $stdout.puts(<<-OUTPUT.gsub(/^ +/, '')
      TO:
      ---
      #{email.to}

      SUBJECT:
      --------
      #{email.subject}

      BODY:
      -----
      #{email.body}
      OUTPUT
    )
  end

  def open_mailto_link
    mailto_link = "mailto:#{escape(email.to)}?"\
      "subject=#{escape(email.subject)}"\
      "&body=#{escape(email.body)}"

    `#{command} "#{mailto_link}"`
  end

  private

  def escape(text)
    Sanitizer.escape(text)
  end

  def special?
    yes_no_prompt(
      'Does the deployer need any special instructions?',
      default_special
    )
  end

  def target_branch_is_master?
    yes_no_prompt(
      "Is 'master' the target branch?",
      default_target_branch_is_master
    )
  end

  def yes_no_prompt(question, default_value)
    print "#{question} #{yes_no_letters(default_value)} "
    loop do
      answer = $stdin.gets.chomp.upcase

      if default_allowed && answer == ''
        return default_value
      elsif answer == 'Y'
        return true
      elsif answer == 'N'
        return false
      else
        print "Please try again... #{yes_no_letters(default_value)} "
      end
    end
  end

  def yes_no_letters(default)
    if default_allowed
      if default
        '[Y/n]'
      else
        '[y/N]'
      end
    else
      '[Y/N]'
    end
  end

  def email
    @email ||= EmailFormatter.new(special?, target_branch_is_master?)
  end

  def command
    if OS.linux?
      'xdg-open'
    else
      'open'
    end
  end
end