Opening Hours Display Tag

bosg_tags.py

WEEKDAYS = (('mon', _('Montag')),
        ('tue', _('Dienstag')),
        ('wed', _('Mittwoch')),
        ('thu', _('Donnerstag')),
        ('fri', _('Freitag')),
        ('sat', _('Samstag')),
        ('sun', _('Sonntag')),
)

class OpeningHoursNode(template.Node):
    def __init__(self, hours):
        self.hours = template.Variable(hours)

    def get_hours_list(self, hours):
        """
        This tag prettifies the opening hours field for facebook places
        @param hours: the field of the facebook page.
        """
        from_day = WEEKDAYS[0][1]
        to_day = WEEKDAYS[0][1]
        o1, o2, c1, c2 = None, None, None, None  # stored hours
        result = []
        for i in range(len(WEEKDAYS)):
            no1 = hours.get('%s_1_open' % WEEKDAYS[i][0], None)
            nc1 = hours.get('%s_1_close' % WEEKDAYS[i][0], None)
            no2 = hours.get('%s_2_open' % WEEKDAYS[i][0], None)
            nc2 = hours.get('%s_2_close' % WEEKDAYS[i][0], None)
            # first run and open mon
            if not (o1 or o2 or c1 or c2) and (no1 or no2):
                o1, o2, c1, c2 = no1, no2, nc1, nc2
                from_day = WEEKDAYS[i][1]
            elif not (o1 or o2 or c1 or c2):
                # beginning of the week and closed.
                continue

            # opening hours have not changed for the current day
            if (no1 == o1 and no2 == o2 and nc1 == c1 and nc2 == c2 and no1):
                to_day = WEEKDAYS[i][1]
                if i < len(WEEKDAYS)-1:
                    continue
            # opening hours have changed. Store and write out the previous days.
            if from_day == to_day:
                if o2:
                    result.append(((from_day, None),(o1,c1),(o2,c2)))
                else:
                    result.append(((from_day, None),(o1,c1), None))
            else:
                if o2:
                    result.append(((from_day, to_day),(o1,c1),(o2,c2)))
                else:
                    result.append(((from_day, to_day),(o1,c1), None))

            if i == len(WEEKDAYS)-1: # last day, write it out
                if from_day == to_day or to_day == WEEKDAYS[i-1][1]:
                    if no2:
                        result.append(((WEEKDAYS[i][1], None),(no1,nc1),(no2,nc2)))
                    elif no1:
                        result.append(((WEEKDAYS[i][1], None),(no1,nc1), None))

            from_day = WEEKDAYS[i][1]
            to_day = WEEKDAYS[i][1]
            o1, o2, c1, c2 = no1, no2, nc1, nc2
        return result