From ef26fecb6a11c8082b3bc67fcc5567c82d2dda03 Mon Sep 17 00:00:00 2001
From: Lars Henrik Mai <lars.mai@kontinui.de>
Date: Wed, 9 Jul 2014 21:37:23 +0200
Subject: use proper delegator for events and recurrences

---
 sublab_calendar.rb | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 75 insertions(+), 3 deletions(-)

diff --git a/sublab_calendar.rb b/sublab_calendar.rb
index 4863759..eab3759 100644
--- a/sublab_calendar.rb
+++ b/sublab_calendar.rb
@@ -1,7 +1,9 @@
 require 'rubygems'
 require 'bundler/setup'
 
-require 'icalendar'
+require 'date'
+require 'active_support/core_ext/date_and_time/calculations'
+require 'icalendar/recurrence'
 require 'open-uri'
 require 'json'
 
@@ -9,10 +11,76 @@ class SublabCalendar
 
   URL = "https://sublab.org:5232/calendars/events"
 
-  Event = Struct.new(:summary, :start, :end) do
+  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
@@ -38,12 +106,16 @@ class SublabCalendar
     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.summary, event.dtstart.to_s, event.dtend.to_s)
+    Event.new(event)
   end
 
 end
-- 
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