Class: GCal4Ruby::Recurrence

Inherits:
Object
  • Object
show all
Defined in:
lib/gcal4ruby/recurrence.rb

Overview

The Recurrence class stores information on an Event’s recurrence. The class implements the RFC 2445 iCalendar recurrence description.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(vars = {}) ⇒ Recurrence

Accepts an optional attributes hash or a string containing a properly formatted ISO 8601 recurrence rule. Returns a new Recurrence object



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# File 'lib/gcal4ruby/recurrence.rb', line 31

def initialize(vars = {})
  if vars.is_a? Hash
    vars.each do |key, value|
      self.send("#{key}=", value)
    end
  elsif vars.is_a? String
    self.load(vars)
  end
  @all_day ||= false
end

Instance Attribute Details

#all_day ⇒ Object

True if the event is all day (i.e. no start/end time)



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# File 'lib/gcal4ruby/recurrence.rb', line 28

def all_day
  @all_day
end

#end ⇒ Object

The event end date/time



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# File 'lib/gcal4ruby/recurrence.rb', line 20

def end
  @end
end

#event ⇒ Object

the event reference



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# File 'lib/gcal4ruby/recurrence.rb', line 22

def event
  @event
end

#frequency ⇒ Object

The event frequency



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# File 'lib/gcal4ruby/recurrence.rb', line 26

def frequency
  @frequency
end

#repeat_until ⇒ Object

The date until which the event will be repeated



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# File 'lib/gcal4ruby/recurrence.rb', line 24

def repeat_until
  @repeat_until
end

#start ⇒ Object

The event start date/time



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# File 'lib/gcal4ruby/recurrence.rb', line 18

def start
  @start
end

Instance Method Details

#load(rec) ⇒ Object

Accepts a string containing a properly formatted ISO 8601 recurrence rule and loads it into the recurrence object



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# File 'lib/gcal4ruby/recurrence.rb', line 43

def load(rec)
  attrs = rec.split("\n")
  attrs.each do |val|
    key, value = val.split(":")
    case key
      when 'DTSTART'
        @start = Time.parse_complete(value)
      when 'DTSTART;VALUE=DATE'
        @start = Time.parse(value)
        @all_day = true
      when 'DTSTART;VALUE=DATE-TIME'
        @start = Time.parse_complete(value)
      when 'DTEND'
        @end = Time.parse_complete(value)
      when 'DTEND;VALUE=DATE'
        @end = Time.parse(value)
      when 'DTEND;VALUE=DATE-TIME'
        @end = Time.parse_complete(value)
      when 'RRULE'
        vals = value.split(";")
        key = ''
        by = ''
        int = nil
        vals.each do |rr|
          a, h = rr.split("=")
          case a 
            when 'FREQ'
              key = h.downcase.capitalize
            when 'INTERVAL'
              int = h
            when 'UNTIL'
              @repeat_until = Time.parse(value)
            else
              by = h.split(",")
          end
        end
        @frequency = {key => by}
        @frequency.merge({'interval' => int}) if int
    end
  end
end

#to_s ⇒ Object

Returns a string with the correctly formatted ISO 8601 recurrence rule



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# File 'lib/gcal4ruby/recurrence.rb', line 86

def to_s
  
  output = ''
  if @all_day
    output += "DTSTART;VALUE=DATE:#{@start.utc.strftime("%Y%m%d")}\n"
  else
    output += "DTSTART;VALUE=DATE-TIME:#{@start.complete}\n"
  end
  if @all_day
    output += "DTEND;VALUE=DATE:#{@end.utc.strftime("%Y%m%d")}\n"
  else
    output += "DTEND;VALUE=DATE-TIME:#{@end.complete}\n"
  end
  output += "RRULE:"
  if @frequency
    f = 'FREQ='
    i = ''
    by = ''
    @frequency.each do |key, v|
      if v.is_a?(Array) 
        if v.size > 0
          value = v.join(",") 
        else
          value = nil
        end
      else
        value = v
      end
      f += "#{key.upcase};" if key != 'interval'
      case key.downcase
        when "secondly"
          by += "BYSECOND=#{value};"
        when "minutely"
          by += "BYMINUTE=#{value};"
        when "hourly"
          by += "BYHOUR=#{value};"
        when "weekly"
          by += "BYDAY=#{value};" if value
        when "monthly"
          by += "BYDAY=#{value};"
        when "yearly"
          by += "BYYEARDAY=#{value};"
        when 'interval'
          i += "INTERVAL=#{value};"
      end
    end
    output += f+i+by
  end      
  if @repeat_until
    output += "UNTIL=#{@repeat_until.strftime("%Y%m%d")}"
  end
  
  output += "\n"
end