# -*- coding: utf-8 -*-
from Acquisition import aq_parent
from plone.app.event import _
from plone.event.interfaces import IEventAccessor
from plone.event.interfaces import IOccurrence
from plone.event.interfaces import IRecurrenceSupport
from plone.memoize import view
from plone.uuid.interfaces import IUUID
from Products.CMFCore.utils import getToolByName
from Products.Five.browser import BrowserView
from zope.component import getMultiAdapter
from zope.contentprovider.interfaces import IContentProvider
[docs]class EventSummaryView(BrowserView):
def __init__(self, context, request):
self.context = context
self.request = request
self.data = IEventAccessor(context)
self.max_occurrences = 6
self.excludes = ['title', ]
@property
def is_occurrence(self):
return IOccurrence.providedBy(self.context)
@property
def event_context(self):
if self.is_occurrence:
return aq_parent(self.context)
return self.context
def formatted_date(self, occ):
provider = getMultiAdapter(
(self.context, self.request, self),
IContentProvider, name='formatted_date'
)
return provider(occ)
@property
@view.memoize
def next_occurrences(self):
"""Returns occurrences for this context, except the start
occurrence, limited to self.max_occurrence occurrences.
:returns: List with next occurrences.
:rtype: list
"""
occurrences = []
adapter = IRecurrenceSupport(self.event_context, None)
if adapter:
for cnt, occ in enumerate(adapter.occurrences(
range_start=self.data.start)):
if cnt == self.max_occurrences:
break
occurrences.append(occ)
return occurrences
@property
@view.memoize
def num_more_occurrences(self):
"""Return the number of extra occurrences, which are not listed by
next_occurrences.
"""
uid = IUUID(self.event_context, None)
if not uid:
# Might be an occurrence
return 0
catalog = getToolByName(self.event_context, 'portal_catalog')
brains = catalog(UID=uid)
if len(brains) == 0:
return 0
brain = brains[0] # assuming, that current context is in the catalog
idx = catalog.getIndexDataForRID(brain.getRID())
num = len(idx['start']) - len(self.next_occurrences)
return num if num > 0 else 0
@property
def more_occurrences_text(self):
msgid = _(
u"msg_num_more_occurrences",
default=u"There are ${results} more occurrences.",
mapping={u"results": self.num_more_occurrences}
)
return self.context.translate(msgid)
