new schedule

app/models/conference.rb

@@ -81,6 +81,16 @@ class Conference < ActiveRecord::Base
     result
   end
 
+  ##
+  # Check if there is any event in the program scheduled.
+  #
+  # ====Returns
+  # * +false+ ->  If there aren't schedules events
+  # * +true+ -> If there are schedules events
+  def scheduled?
+    self.program.events.where.not(start_time: nil).any?
+  end
+
   ##
   # Checks if the user is registered to the conference
   #

app/models/event.rb

@@ -223,6 +223,20 @@ class Event < ActiveRecord::Base
     (100 * result.values.count(true) / result.values.compact.count).to_s
   end
 
+  ##
+  # Returns the number of columns this event should span in the schedule
+  #
+  def span
+    self.event_type.length / EventType::LENGTH_STEP
+  end
+
+  ##
+  # Returns end of the event
+  #
+  def end_time
+    self.start_time + self.event_type.length.minutes
+  end
+
   private
 
   ##

app/models/event_type.rb

@@ -10,6 +10,7 @@ class EventType < ActiveRecord::Base
 
   alias_attribute :name, :title
 
+  # If LENGTH_STEP > 60 the public schedule must be changed
   LENGTH_STEP = 15
 
   private