require 'fileutils'
require 'hws_settings'
require 'p4_util'

# These are helper methods that should be common to most modular 'Apps' in
# Helix Web Services.
module HWSHelpers

  # This will ensure that the environment contains a p4 handle that is
  # configured using our typical `hws_settings` options.
  #
  # It should be rare to actually require using this method. This is typically
  # generated by authentication middleware.
  #
  # The p4 is possibly *not* connected or logged in.
  def require_p4
    unless !env['p4'].nil?
      p4 = P4Util.open_from_env(env)
      p4.connect
      env['p4'] = p4
    end
  end

  # This ensures that the `p4` handle has an associated temporary client
  # workspace.
  #
  # The local temporary directory is saved under 'p4_root'.
  def require_p4_with_temp_client
    require_p4
    env['p4_root'] = P4Util.create_temp_client(env['p4'])
  end

  def p4
    env['p4'] || fail('require_p4 not called')
  end

  def user
    env['AUTH_CREDENTIALS'].first
  end
end