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Viewing changes to lib/schoolbell/browser.py

  • Committer: Jonathan Lange
  • Date: 2010-03-21 16:25:49 UTC
  • mfrom: (10554 launchpad)
  • mto: This revision was merged to the branch mainline in revision 10558.
  • Revision ID: jml@canonical.com-20100321162549-5bqb52pif7wn98jc
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lib/schoolbell/browser.py
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r"""
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Browser views for schoolbell.
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iCalendar views
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---------------
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CalendarICalendarView can export calendars in iCalendar format
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    >>> from datetime import datetime, timedelta
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    >>> from schoolbell.simple import ImmutableCalendar, SimpleCalendarEvent
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    >>> event = SimpleCalendarEvent(datetime(2004, 12, 16, 11, 46, 16),
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    ...                             timedelta(hours=1), "doctests",
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    ...                             location=u"Matar\u00f3",
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    ...                             unique_id="12345678-5432@example.com")
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    >>> calendar = ImmutableCalendar([event])
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    >>> from zope.publisher.browser import TestRequest
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    >>> view = CalendarICalendarView()
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    >>> view.context = calendar
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    >>> view.request = TestRequest()
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    >>> output = view.show()
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    >>> lines = output.splitlines(True)
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    >>> from pprint import pprint
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    >>> pprint(lines)
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    ['BEGIN:VCALENDAR\r\n',
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     'VERSION:2.0\r\n',
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     'PRODID:-//SchoolTool.org/NONSGML SchoolBell//EN\r\n',
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     'BEGIN:VEVENT\r\n',
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     'UID:12345678-5432@example.com\r\n',
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     'SUMMARY:doctests\r\n',
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     'LOCATION:Matar\xc3\xb3\r\n',
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     'DTSTART:20041216T114616\r\n',
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     'DURATION:PT1H\r\n',
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     'DTSTAMP:...\r\n',
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     'END:VEVENT\r\n',
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     'END:VCALENDAR']
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XXX: Should the last line also end in '\r\n'?  Go read RFC 2445 and experiment
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with calendaring clients.
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Register the iCalendar read view in ZCML as
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    <browser:page
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        for="schoolbell.interfaces.ICalendar"
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        name="calendar.ics"
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        permission="zope.Public"
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        class="schoolbell.browser.CalendarICalendarView"
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        attribute="show"
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        />
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"""
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from schoolbell.icalendar import convert_calendar_to_ical
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__metaclass__ = type
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class CalendarICalendarView:
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    """RFC 2445 (ICalendar) view for calendars."""
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    def show(self):
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        data = "\r\n".join(convert_calendar_to_ical(self.context))
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        request = self.request
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        if request is not None:
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            request.response.setHeader('Content-Type',
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                                       'text/calendar; charset=UTF-8')
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            request.response.setHeader('Content-Length', len(data))
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        return data
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