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require 'rubygems'
require 'bundler/setup'
require 'date'
require 'active_support/core_ext/date_and_time/calculations'
require 'icalendar/recurrence'
require 'open-uri'
require 'json'
class SublabCalendar
URL = "https://sublab.org:5232/calendars/events"
class Event < SimpleDelegator
BASIC_ATTRIBUTES = [:summary, :dtstart, :dtend]
def to_h
BASIC_ATTRIBUTES.inject({}) {|hsh, attr| hsh[attr] = send(attr).to_s; hsh }
end
def to_json(*args)
to_h.to_json(*args)
end
def to_s
"<#{self.class} #{self.to_h}>"
end
def inspect
to_s
end
def recurring?
! rrule.empty?
end
def occurrences_this_month
return nil unless recurring?
occurrences_between(*this_month).map {|occ| Occurrence.new(occ, self) }
end
private
def this_month
[Date.today.beginning_of_month, Date.today.end_of_month]
end
end
class Occurrence < SimpleDelegator
attr_reader :event
def initialize(occurrence, event)
@event = event
super(occurrence)
end
def to_h
{
summary: summary,
start: start_time,
end: end_time
}
end
def inspect
to_s
end
def summary
event.summary
end
def description
event.description
end
def to_s
"<#{self.class} #{self.to_h}>"
end
end
attr_reader :calendar
def initialize(ical)
@calendar = Icalendar.parse(ical).first
end
def self.load(url=URL)
ical = open(url, {ssl_verify_mode: OpenSSL::SSL::VERIFY_NONE})
new(ical)
end
def events
calendar.events.map(&method(:readable))
end
def future
calendar.events.select {|ev| ev.dtstart >= DateTime.now}.map(&method(:readable))
end
def past
calendar.events.select {|ev| ev.dtstart < DateTime.now}.map(&method(:readable))
end
def recurring
events.select(&:"recurring?")
end
def next(count=1)
future.take(count)
end
def readable(event)
Event.new(event)
end
end
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