module ICalPal

def self.call(klass)
  case klass
  when 'accounts' then Store
  when 'stores' then Store
  when 'calendars' then Calendar
  when 'events' then Event
  when 'tasks' then Task
  else
    $log.fatal("Unknown class: #{klass}")
    exit
  end
end

def self.nth(n, dow, m)
  # Get the number of days in the month
  a = [ ICalPal::RDT.new(m.year, m.month, 1) ] # First of this month
  a[1] = (a[0] >> 1) - 1      # First of next month, minus 1 day
  # Reverse it if going backwards
  a.reverse! if n.negative?
  step = a[1] <=> a[0]
  j = 0
  a[0].step(a[1], step) do |i|
    j += step if i.wday == DOW[dow.to_sym]
    return i if j == n
  end
end

def [](k) @self[k] end

def []=(k, v) @self[k] = v end

def initialize(obj)
  obj['type'] = EventKit::EKSourceType.find_index { |i| i[:name] == 'Subscribed' } if obj['subcal_url']
  type = EventKit::EKSourceType[obj['type']]
  obj['store'] = obj['account']
  obj['type'] = type[:name]
  obj['color'] ||= type[:color]
  obj['symbolic_color_name'] ||= type[:color]
  @self = obj
end

def keys() @self.keys end

def values() @self.values end