Class: RRule::Context

Inherits:
Object
  • Object
show all
Defined in:
lib/rrule/context.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options, dtstart, tz) ⇒ Context

Returns a new instance of Context.



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# File 'lib/rrule/context.rb', line 7

def initialize(options, dtstart, tz)
  @options = options
  @dtstart = dtstart
  @tz = tz
end

Instance Attribute Details

#day_of_year_mask ⇒ Object (readonly)

Returns the value of attribute day_of_year_mask.



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# File 'lib/rrule/context.rb', line 5

def day_of_year_mask
  @day_of_year_mask
end

#dtstart ⇒ Object (readonly)

Returns the value of attribute dtstart.



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# File 'lib/rrule/context.rb', line 5

def dtstart
  @dtstart
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/rrule/context.rb', line 5

def options
  @options
end

#tz ⇒ Object (readonly)

Returns the value of attribute tz.



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# File 'lib/rrule/context.rb', line 5

def tz
  @tz
end

#year ⇒ Object (readonly)

Returns the value of attribute year.



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# File 'lib/rrule/context.rb', line 5

def year
  @year
end

Instance Method Details

#elapsed_days_in_year_by_month ⇒ Object 



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# File 'lib/rrule/context.rb', line 92

def elapsed_days_in_year_by_month
  @elapsed_days_in_year_by_month ||= [0] + (1..12).map { |month| Date.new(year, month).end_of_month.yday }
end

#first_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 60

def first_day_of_year
  @first_day_of_year ||= Date.new(year).beginning_of_year
end

#first_weekday_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 64

def first_weekday_of_year
  @first_weekday_of_year ||= first_day_of_year.wday
end

#month_by_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 68

def month_by_day_of_year
  @month_by_day_of_year ||= days_in_year.map(&:month)
end

#month_day_by_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 72

def month_day_by_day_of_year
  @month_day_by_day_of_year ||= days_in_year.map(&:day)
end

#negative_month_day_by_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 76

def negative_month_day_by_day_of_year
  @negative_month_day_by_day_of_year ||= days_in_year.map { |day| day.day - day.end_of_month.day - 1 }
end

#negative_week_number_by_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 88

def negative_week_number_by_day_of_year
  @negative_week_number_by_day_of_year ||= days_in_year.map { |day| day.cweek - Date.new(day.cwyear, 12, 28).cweek - 1 }
end

#next_year_length_in_days ⇒ Object 



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# File 'lib/rrule/context.rb', line 56

def next_year_length_in_days
  @next_year_length_in_days ||= Date.leap?(year + 1) ? 366 : 365
end

#rebuild(year, month) ⇒ Object 



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# File 'lib/rrule/context.rb', line 13

def rebuild(year, month)
  @year = year

  reset_year if year != last_year

  if options[:bynweekday] && !options[:bynweekday].empty? && (month != last_month || year != last_year)
    possible_date_ranges = []

    case options[:freq]
    when 'YEARLY'
      if options[:bymonth]
        options[:bymonth].each do |mon|
          possible_date_ranges.push(elapsed_days_in_year_by_month[(mon - 1)..mon])
        end
      else
        possible_date_ranges = [[0, year_length_in_days]]
      end
    when 'MONTHLY'
      possible_date_ranges = [elapsed_days_in_year_by_month[(month - 1)..month]]
    end

    unless possible_date_ranges.empty?
      @day_of_year_mask = Array.new(year_length_in_days, false)

      possible_date_ranges.each do |possible_date_range|
        year_day_start = possible_date_range[0]
        year_day_end = possible_date_range[1] - 1
        options[:bynweekday].each do |weekday|
          day_of_year = day_of_year_within_range(weekday, year_day_start, year_day_end)
          day_of_year_mask[day_of_year] = true if day_of_year
        end
      end
    end
  end

  @last_year = year
  @last_month = month
end

#week_number_by_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 84

def week_number_by_day_of_year
  @week_number_by_day_of_year ||= days_in_year.map(&:cweek)
end

#weekday_by_day_of_year ⇒ Object 



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# File 'lib/rrule/context.rb', line 80

def weekday_by_day_of_year
  @weekday_by_day_of_year ||= weekdays_in_year.drop(first_weekday_of_year)
end

#year_length_in_days ⇒ Object 



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# File 'lib/rrule/context.rb', line 52

def year_length_in_days
  @year_length_in_days ||= leap_year? ? 366 : 365
end