lib/nos_oignons/subscriptions.rb

   1 require 'safe_yaml'
   2 SafeYAML::OPTIONS[:default_mode] = :safe
   3
   4 module NosOignons
   5   SUBSCRIPTIONS_ROOT = 'Membres'
   6   SUBSCRIPTION_FIELDS = [:name, :address, :email, :membership_fee_paid_on]
   7   SUBSCRIPTION_MANDATORY_FIELDS = [:name, :email]
   8
   9   class Subscription < Struct.new(*SUBSCRIPTION_FIELDS)
  10     class << self
  11       def all
  12         Dir.glob("#{SUBSCRIPTIONS_ROOT}/*.mdwn").sort.collect do |file|
  13           subscription_id = File.basename(file).gsub(/\.mdwn$/, '')
  14           Subscription.new(subscription_id)
  15         end
  16       end
  17
  18       def filename_for_id(subscription_id)
  19         "Membres/%06d.mdwn" % subscription_id
  20       end
  21
  22       def read_from_git(ref, file)
  23         IO.popen(['git', 'show', "#{ref}:#{file}"]) do |f|
  24           subscription_id = File.basename(file).gsub(/\.mdwn$/, '')
  25           Subscription.new(subscription_id, f.read)
  26         end
  27       end
  28     end
  29
  30     attr_reader :subscription_id
  31
  32     def initialize(subscription_id, page_content=nil)
  33       unless subscription_id =~ /\A\d{6}\z/
  34         raise ArgumentError.new('bad subscription id format')
  35       end
  36       @subscription_id = subscription_id
  37       unless page_content
  38         page_content = File.open(Subscription.filename_for_id(subscription_id)).read
  39       end
  40       unless page_content.start_with?("---\n")
  41         raise ArgumentError.new('content is not a proper YAML document')
  42       end
  43       data = YAML.load(page_content)
  44       SUBSCRIPTION_FIELDS.each do |field|
  45         self[field] = data[field.to_s]
  46       end
  47       # Immutability for the win
  48       SUBSCRIPTION_FIELDS.each do |field|
  49         instance_eval{ undef :"#{field}=" }
  50       end
  51       SUBSCRIPTION_MANDATORY_FIELDS.each do |sym|
  52         raise ArgumentError.new('missing mandatory fields') unless self[sym]
  53       end
  54       if membership_fee_paid_on && !membership_fee_paid_on.is_a?(Date)
  55         raise ArgumentError.new('membership_fee_paid_on is not a date')
  56       end
  57     end
  58
  59     def up_to_date?
  60       now = Time.now
  61       last_year = Time.new(now.year - 1, now.month, now.day).to_date
  62       membership_fee_paid_on && last_year < membership_fee_paid_on
  63     end
  64   end
  65 end