from time import localtime from zope.interface import implements from zope.component import getMultiAdapter from Acquisition import aq_inner from DateTime.DateTime import DateTime from DateTime.DateTime import DateTimeError from Products.CMFCore.utils import getToolByName from Products.Five.browser import BrowserView from interfaces import IDateComponents CEILING=DateTime(9999, 0) FLOOR=DateTime(1970, 0) PLONE_CEILING=DateTime(2500,0) # 2499-12-31 def english_month_names(): names={} for x in range(1,13): faux=DateTime(2004, x, 1) names[x]=faux.Month() return names ENGLISH_MONTH_NAMES=english_month_names() class DateComponents(BrowserView): """A view that provides some helper methods useful in date widgets. """ implements(IDateComponents) def result(self, date=None, use_ampm=False, starting_year=None, ending_year=None, future_years=None, minute_step=5): """Returns a dict with date information. """ ptool = getToolByName(self.context, 'portal_properties') site_props = ptool.site_properties # Get the date format from the locale context = aq_inner(self.context) portal_state = getMultiAdapter((context, self.request), name=u'plone_portal_state') dates = portal_state.locale().dates timepattern = dates.getFormatter('time').getPattern() if 'a' in timepattern: use_ampm = True month_names = dates.getFormatter('date').calendar.months # 'id' is what shows up. December for month 12. # 'value' is the value for the form. # 'selected' is whether or not it is selected. default=0 years=[] days=[] months=[] hours=[] minutes=[] ampm=[] now=DateTime() if isinstance(date, basestring): date=date.strip() if not date: date=None else: # Please see datecomponents.txt for an explanation of # the next few lines. Also see #11423 dateParts = date.split(" ") dateParts[0] = dateParts[0].replace("-", "/") date=' '.join(dateParts) if date is None: date=now default=1 elif not isinstance(date, DateTime): try: date=DateTime(date) except (TypeError, DateTimeError): date=now default=1 # Anything above PLONE_CEILING should be PLONE_CEILING if date.greaterThan(PLONE_CEILING): date = PLONE_CEILING # Represent the date in the local timezone try: local_zone = date.localZone(localtime(date.timeTime())) except ValueError: # Dates before 1970 use a negative timeTime() value, which on # on some platforms are not handled well and lead to a ValueError. # In those cases, calculate the local timezone (which is DST based) # from the same date in the *current year* instead. This is better # than failing altogether! timeZoneDate = DateTime(localtime().tm_year, *date.parts()[1:]) local_zone = date.localZone(localtime(timeZoneDate.timeTime())) date = date.toZone(local_zone) # Get portal year range if starting_year is None: min_year = site_props.getProperty('calendar_starting_year', 1999) else: min_year = int(starting_year) if ending_year is None: if future_years is None: max_year = site_props.getProperty('calendar_future_years_available', 5) + now.year() else: max_year = int(future_years) + now.year() else: max_year = int(ending_year) # keeps the existing date if it's out of range if not default: if min_year > date.year(): min_year = date.year() if max_year < date.year(): max_year = date.year() year=date.year() if default: years.append({'id': '--', 'value': '0000', 'selected': 1}) else: years.append({'id': '--', 'value': '0000', 'selected': None}) for x in range(min_year, max_year+1): d={'id': x, 'value': x, 'selected': None} if x==year and not default: d['selected']=1 years.append(d) month=date.month() if default: months.append({'id': '--', 'value': '00', 'selected': 1, 'title': '--'}) else: months.append({'id': '--', 'value': '00', 'selected': None, 'title': '--'}) for x in range(1, 13): d={'id': ENGLISH_MONTH_NAMES[x], 'value': '%02d' % x, 'selected': None} if x==month and not default: d['selected']=1 d['title']=month_names[x][0] months.append(d) day=date.day() if default: days.append({'id': '--', 'value': '00', 'selected': 1}) else: days.append({'id': '--', 'value': '00', 'selected': None}) for x in range(1, 32): d={'id': x, 'value': '%02d' % x, 'selected': None} if x==day and not default: d['selected']=1 days.append(d) if use_ampm: hours_range=[12]+range(1,12) hour_default='12' hour=int(date.h_12()) else: hours_range=range(0,24) hour_default='00' hour=int(date.h_24()) if default: hours.append({'id': '--', 'value': hour_default, 'selected': 1}) else: hours.append({'id': '--', 'value': hour_default, 'selected': None}) for x in hours_range: d={'id': '%02d' % x, 'value': '%02d' % x, 'selected': None } if x==hour and not default: d['selected']=1 hours.append(d) if default: minutes.append({'id': '--', 'value': '00', 'selected': 1}) else: minutes.append({'id': '--', 'value': '00', 'selected': None}) minute=date.minute() if minute_step is None: minute_step = 5 if minute + minute_step >= 60: # edge case. see doctest for explanation minute = 60 - minute_step for x in range(0, 60, minute_step): d={'id': '%02d' % x, 'value': '%02d' % x, 'selected': None} if (x==minute or minute < x < minute+minute_step) and not default: d['selected']=1 minutes.append(d) if use_ampm: p=date.strftime('%p') if default: ampm.append({'id': '--', 'value': 'AM', 'selected': 1}) else: ampm.append({'id': '--', 'value': 'AM', 'selected': None}) for x in ('AM', 'PM'): d={'id': x, 'value': x, 'selected': None} if x==p and not default: d['selected']=1 ampm.append(d) return {'years': years, 'months': months, 'days': days, 'hours': hours, 'minutes': minutes, 'ampm': ampm}