33     period: The name of a period (without start or end).

    33     period: The name of a period (without start or end).

    34   """

    34   """

    35 

    35 

    36   return isBeforeEvent(entity, '%s_start' % period)

    36   return isBeforeEvent(entity, '%s_start' % period)

    37 

    37 

    38 def isBeforeEvent(entity, event):

    39 def isBeforeEvent(entity, event):

    39   """Returns true iff the current DateTime is before the given event.

    40   """Returns true iff the current DateTime is before the given event.

    40 

    41 

    41   Args:

    42   Args:

    42     entity: Instance of a timeline model.

    43     entity: Instance of a timeline model.

    46 

    47 

    47   if event_time:

    48   if event_time:

    48     return datetime.datetime.utcnow() < event_time

    49     return datetime.datetime.utcnow() < event_time

    49   else:

    50   else:

    50     return False

    51     return False

    51 

    53 

    52 def isActivePeriod(entity, period):

    54 def isActivePeriod(entity, period):

    53   """Returns true iff the current DateTime is between period_start and period_end.

    55   """Returns true iff the current DateTime is between period_start and period_end.

    54 

    56 

    55   Args:

    57   Args:

    63   period_started = isAfterEvent(entity, period_start)

    65   period_started = isAfterEvent(entity, period_start)

    64   period_not_ended = isBeforeEvent(entity, period_end)

    66   period_not_ended = isBeforeEvent(entity, period_end)

    65 

    67 

    66   return period_started and period_not_ended

    68   return period_started and period_not_ended

    67 

    69 

    68 def isAfterPeriod(entity, period):

    71 def isAfterPeriod(entity, period):

    69   """Returns true iff the current DateTime is after the given period_end.

    72   """Returns true iff the current DateTime is after the given period_end.

    70 

    73 

    71   Args:

    74   Args:

    72     entity: Instance of a timeline model.

    75     entity: Instance of a timeline model.

    73     period: The name of a period (without start or end).

    76     period: The name of a period (without start or end).

    74   """

    77   """

    75 

    78 

    76   return isAfterEvent(entity, '%s_end' % period)

    79   return isAfterEvent(entity, '%s_end' % period)

    77 

    81 

    78 def isAfterEvent(entity, event):

    82 def isAfterEvent(entity, event):

    79   """Returns true iff the current DateTime is after the given event.

    83   """Returns true iff the current DateTime is after the given event.

    80 

    84 

    81   Args:

    85   Args:

    86 

    90 

    87   if event_time:

    91   if event_time:

    88     return event_time < datetime.datetime.utcnow()

    92     return event_time < datetime.datetime.utcnow()

    89   else:

    93   else:

    90     return False

    94     return False

    91 

    96 

    92 def getDateTimeByName(entity, name):

    97 def getDateTimeByName(entity, name):

    93   """Returns the DateTime property with the given name. 

    98   """Returns the DateTime property with the given name. 

    94 

    99 

    95   Args:

   100   Args: