#  Events.py  Copyright (c) Kari Laitinen

#  http://www.naturalprogramming.com

#  2006-05-18  File created.
#  2009-01-22  class ISODate used in place of Date
#  2022-12-18  Converted to Python 3.

#  During compilation and execution, the file ISODate.py must be in
#  the same folder together with this program.


from ISODate import ISODate

class Event ( ISODate ) :

   def __init__( self, year_of_event,
                       month_of_event,
                       day_of_event,
                       given_event_description ) :

      ISODate.__init__( self, year_of_event,
                              month_of_event,
                              day_of_event  )

      self.event_description  =  given_event_description



   def __str__( self ) :

      date_of_event  =  ISODate( self.this_year,
                                 self.this_month,
                                 self.this_day )

      return  "%s   %s"  %  ( date_of_event,  self.event_description )


   def __lt__( self, event_to_compare_to ) :
   
      return self.is_earlier_than( event_to_compare_to )

   def __eq__( self, event_to_compare_to ) :
   
      return self.is_equal_to( event_to_compare_to )

   def __gt__( self, event_to_compare_to ) :
   
      return self.is_later_than( event_to_compare_to )


#  The main program begins.

birth_of_lennon   =  Event( 1940, 10,  9, "John Lennon was born." )
birth_of_einstein =  Event( 1879,  3, 14, "Albert Einstein was born." )

list_of_events  =  []

list_of_events.append( birth_of_lennon )
list_of_events.append( birth_of_einstein )
list_of_events.append( 
    Event( 1980, 12, 8, "John Lennon was shot in New York." ) )

print( "\nEvents of list_of_events:" )

event_index  =  0

while  event_index  <  len( list_of_events ) :

   print( "\n   %s"  %  list_of_events[ event_index ], end="" )
   event_index  +=  1



another_event_list  =  []

another_event_list.insert( 0,
   Event( 1926, 6,  1, "Marilyn Monroe was born." ) )
another_event_list.insert( 0,
   Event( 1962, 8,  5, "Marilyn Monroe died." ) )
another_event_list.append(
   Event( 1769, 8, 15, "Napoleon Bonaparte was born." ) )
another_event_list.append(
   Event( 1881,10, 25, "Pablo Picasso was born." ) )


print( "\n\nEvents of another_event_list:" )

for  event_index  in  range( len( another_event_list ) ) :

   print( "\n   %s"  %  another_event_list[ event_index ], end="" )


list_of_events.sort()
another_event_list.sort()

list_of_events  =  another_event_list  +  list_of_events

print( "\n\nEvents of list_of_events:" )

for  event_on_list  in  list_of_events :

   print( "\n   %s"  %  event_on_list, end="" )


print( "\n" )