Class: IceCube::IcalParser

Inherits:
Object
  • Object
show all
Defined in:
lib/ice_cube/parsers/ical_parser.rb

Class Method Summary collapse

Class Method Details

.rule_from_ical(ical) ⇒ Object 



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# File 'lib/ice_cube/parsers/ical_parser.rb', line 26

def self.rule_from_ical(ical)
  params = { validations: { } }

  ical.split(';').each do |rule|
    (name, value) = rule.split('=')
    value.strip!
    case name
    when 'FREQ'
      params[:freq] = value.downcase
    when 'INTERVAL'
      params[:interval] = value.to_i
    when 'COUNT'
      params[:count] = value.to_i
    when 'UNTIL'
      params[:until] = Time.parse(value).utc
    when 'WKST'
      params[:wkst] = TimeUtil.ical_day_to_symbol(value)
    when 'BYSECOND'
      params[:validations][:second_of_minute] = value.split(',').collect(&:to_i)
    when 'BYMINUTE'
      params[:validations][:minute_of_hour] = value.split(',').collect(&:to_i)
    when 'BYHOUR'
      params[:validations][:hour_of_day] = value.split(',').collect(&:to_i)
    when 'BYDAY'
      dows = {}
      days = []
      value.split(',').each do |expr|
        day = TimeUtil.ical_day_to_symbol(expr.strip[-2..-1])
        if expr.strip.length > 2  # day with occurence
          occ = expr[0..-3].to_i
          dows[day].nil? ? dows[day] = [occ] : dows[day].push(occ)
          days.delete(TimeUtil.sym_to_wday(day))
        else
          days.push TimeUtil.sym_to_wday(day) if dows[day].nil?
        end
      end
      params[:validations][:day_of_week] = dows unless dows.empty?
      params[:validations][:day] = days unless days.empty?
    when 'BYMONTHDAY'
      params[:validations][:day_of_month] = value.split(',').collect(&:to_i)
    when 'BYMONTH'
      params[:validations][:month_of_year] = value.split(',').collect(&:to_i)
    when 'BYYEARDAY'
      params[:validations][:day_of_year] = value.split(',').collect(&:to_i)
    when 'BYSETPOS'
    else
      raise "Invalid or unsupported rrule command: #{name}"
    end
  end

  params[:interval] ||= 1

  # WKST only valid for weekly rules
  params.delete(:wkst) unless params[:freq] == 'weekly'

  rule = Rule.send(*params.values_at(:freq, :interval, :wkst).compact)
  rule.count(params[:count]) if params[:count]
  rule.until(params[:until]) if params[:until]
  params[:validations].each do |key, value|
    value.is_a?(Array) ? rule.send(key, *value) : rule.send(key, value)
  end

  rule
end

.schedule_from_ical(ical_string, options = {}) ⇒ Object 



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# File 'lib/ice_cube/parsers/ical_parser.rb', line 3

def self.schedule_from_ical(ical_string, options = {})
  data = {}
  ical_string.each_line do |line|
    (property, value) = line.split(':')
    (property, tzid) = property.split(';')
    case property
    when 'DTSTART'
      data[:start_time] = Time.parse(value)
    when 'DTEND'
      data[:end_time] = Time.parse(value)
    when 'EXDATE'
      data[:extimes] ||= []
      data[:extimes] += value.split(',').map{|v| Time.parse(v)}
    when 'DURATION'
      data[:duration] # FIXME
    when 'RRULE'
      data[:rrules] ||= []
      data[:rrules] += [rule_from_ical(value)]
    end
  end
  Schedule.from_hash data
end