1044 lines
32 KiB
Python
1044 lines
32 KiB
Python
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# -*- coding: utf-8 -*-
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"""This module contains the parser/generators (or coders/encoders if you
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prefer) for the classes/datatypes that are used in iCalendar:
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###########################################################################
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# This module defines these property value data types and property parameters
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4.2 Defined property parameters are:
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ALTREP, CN, CUTYPE, DELEGATED-FROM, DELEGATED-TO, DIR, ENCODING, FMTTYPE,
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FBTYPE, LANGUAGE, MEMBER, PARTSTAT, RANGE, RELATED, RELTYPE, ROLE, RSVP,
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SENT-BY, TZID, VALUE
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4.3 Defined value data types are:
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BINARY, BOOLEAN, CAL-ADDRESS, DATE, DATE-TIME, DURATION, FLOAT, INTEGER,
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PERIOD, RECUR, TEXT, TIME, URI, UTC-OFFSET
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###########################################################################
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iCalendar properties have values. The values are strongly typed. This module
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defines these types, calling val.to_ical() on them will render them as defined
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in rfc2445.
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If you pass any of these classes a Python primitive, you will have an object
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that can render itself as iCalendar formatted date.
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Property Value Data Types start with a 'v'. they all have an to_ical() and
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from_ical() method. The to_ical() method generates a text string in the
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iCalendar format. The from_ical() method can parse this format and return a
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primitive Python datatype. So it should always be true that:
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x == vDataType.from_ical(VDataType(x).to_ical())
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These types are mainly used for parsing and file generation. But you can set
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them directly.
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"""
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from datetime import date
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from datetime import datetime
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from datetime import time
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from datetime import timedelta
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from datetime import tzinfo
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try:
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from dateutil.tz import tzutc
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except ImportError:
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tzutc = None
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from icalendar import compat
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from icalendar.caselessdict import CaselessDict
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from icalendar.parser import Parameters
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from icalendar.parser import escape_char
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from icalendar.parser import tzid_from_dt
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from icalendar.parser import unescape_char
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from icalendar.parser_tools import DEFAULT_ENCODING
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from icalendar.parser_tools import SEQUENCE_TYPES
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from icalendar.parser_tools import to_unicode
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from icalendar.timezone_cache import _timezone_cache
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from icalendar.windows_to_olson import WINDOWS_TO_OLSON
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import base64
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import binascii
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import pytz
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import re
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import time as _time
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DATE_PART = r'(\d+)D'
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TIME_PART = r'T(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?'
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DATETIME_PART = '(?:%s)?(?:%s)?' % (DATE_PART, TIME_PART)
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WEEKS_PART = r'(\d+)W'
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DURATION_REGEX = re.compile(r'([-+]?)P(?:%s|%s)$'
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% (WEEKS_PART, DATETIME_PART))
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WEEKDAY_RULE = re.compile(r'(?P<signal>[+-]?)(?P<relative>[\d]?)'
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r'(?P<weekday>[\w]{2})$')
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####################################################
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# handy tzinfo classes you can use.
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#
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ZERO = timedelta(0)
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HOUR = timedelta(hours=1)
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STDOFFSET = timedelta(seconds=-_time.timezone)
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if _time.daylight:
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DSTOFFSET = timedelta(seconds=-_time.altzone)
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else:
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DSTOFFSET = STDOFFSET
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DSTDIFF = DSTOFFSET - STDOFFSET
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class FixedOffset(tzinfo):
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"""Fixed offset in minutes east from UTC.
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"""
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def __init__(self, offset, name):
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self.__offset = timedelta(minutes=offset)
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self.__name = name
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def utcoffset(self, dt):
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return self.__offset
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def tzname(self, dt):
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return self.__name
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def dst(self, dt):
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return ZERO
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class LocalTimezone(tzinfo):
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"""Timezone of the machine where the code is running.
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"""
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def utcoffset(self, dt):
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if self._isdst(dt):
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return DSTOFFSET
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else:
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return STDOFFSET
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def dst(self, dt):
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if self._isdst(dt):
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return DSTDIFF
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else:
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return ZERO
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def tzname(self, dt):
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return _time.tzname[self._isdst(dt)]
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def _isdst(self, dt):
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tt = (dt.year, dt.month, dt.day,
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dt.hour, dt.minute, dt.second,
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dt.weekday(), 0, -1)
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stamp = _time.mktime(tt)
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tt = _time.localtime(stamp)
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return tt.tm_isdst > 0
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class vBinary(object):
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"""Binary property values are base 64 encoded.
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"""
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def __init__(self, obj):
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self.obj = to_unicode(obj)
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self.params = Parameters(encoding='BASE64', value="BINARY")
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def __repr__(self):
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return "vBinary('%s')" % self.to_ical()
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def to_ical(self):
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return binascii.b2a_base64(self.obj.encode('utf-8'))[:-1]
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@staticmethod
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def from_ical(ical):
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try:
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return base64.b64decode(ical)
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except UnicodeError:
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raise ValueError('Not valid base 64 encoding.')
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class vBoolean(int):
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"""Returns specific string according to state.
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"""
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BOOL_MAP = CaselessDict({'true': True, 'false': False})
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def __new__(cls, *args, **kwargs):
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self = super(vBoolean, cls).__new__(cls, *args, **kwargs)
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self.params = Parameters()
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return self
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def to_ical(self):
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if self:
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return b'TRUE'
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return b'FALSE'
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@classmethod
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def from_ical(cls, ical):
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try:
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return cls.BOOL_MAP[ical]
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except:
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raise ValueError("Expected 'TRUE' or 'FALSE'. Got %s" % ical)
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class vCalAddress(compat.unicode_type):
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"""This just returns an unquoted string.
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"""
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def __new__(cls, value, encoding=DEFAULT_ENCODING):
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value = to_unicode(value, encoding=encoding)
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self = super(vCalAddress, cls).__new__(cls, value)
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self.params = Parameters()
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return self
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def __repr__(self):
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return "vCalAddress('%s')" % self.to_ical()
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def to_ical(self):
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return self.encode(DEFAULT_ENCODING)
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@classmethod
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def from_ical(cls, ical):
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return cls(ical)
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class vFloat(float):
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"""Just a float.
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"""
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def __new__(cls, *args, **kwargs):
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self = super(vFloat, cls).__new__(cls, *args, **kwargs)
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self.params = Parameters()
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return self
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def to_ical(self):
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return compat.unicode_type(self).encode('utf-8')
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@classmethod
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def from_ical(cls, ical):
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try:
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return cls(ical)
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except:
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raise ValueError('Expected float value, got: %s' % ical)
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class vInt(int):
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"""Just an int.
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"""
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def __new__(cls, *args, **kwargs):
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self = super(vInt, cls).__new__(cls, *args, **kwargs)
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self.params = Parameters()
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return self
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def to_ical(self):
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return compat.unicode_type(self).encode('utf-8')
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@classmethod
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def from_ical(cls, ical):
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try:
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return cls(ical)
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except:
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raise ValueError('Expected int, got: %s' % ical)
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class vDDDLists(object):
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"""A list of vDDDTypes values.
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"""
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def __init__(self, dt_list):
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if not hasattr(dt_list, '__iter__'):
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dt_list = [dt_list]
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vDDD = []
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tzid = None
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for dt in dt_list:
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dt = vDDDTypes(dt)
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vDDD.append(dt)
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if 'TZID' in dt.params:
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tzid = dt.params['TZID']
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if tzid:
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# NOTE: no support for multiple timezones here!
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self.params = Parameters({'TZID': tzid})
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self.dts = vDDD
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def to_ical(self):
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dts_ical = (dt.to_ical() for dt in self.dts)
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return b",".join(dts_ical)
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@staticmethod
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def from_ical(ical, timezone=None):
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out = []
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ical_dates = ical.split(",")
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for ical_dt in ical_dates:
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out.append(vDDDTypes.from_ical(ical_dt, timezone=timezone))
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return out
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class vCategory(object):
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def __init__(self, c_list):
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if not hasattr(c_list, '__iter__'):
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d_list = [c_list]
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self.cats = [vText(c) for c in c_list]
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def to_ical(self):
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return b",".join([c.to_ical() for c in self.cats])
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@staticmethod
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def from_ical(ical, timezone=None):
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out = unescape_char(ical).split(",")
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return out
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class vDDDTypes(object):
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"""A combined Datetime, Date or Duration parser/generator. Their format
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cannot be confused, and often values can be of either types.
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So this is practical.
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"""
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def __init__(self, dt):
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if not isinstance(dt, (datetime, date, timedelta, time, tuple)):
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raise ValueError('You must use datetime, date, timedelta, '
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'time or tuple (for periods)')
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if isinstance(dt, datetime):
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self.params = Parameters({'value': 'DATE-TIME'})
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elif isinstance(dt, date):
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self.params = Parameters({'value': 'DATE'})
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elif isinstance(dt, time):
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self.params = Parameters({'value': 'TIME'})
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elif isinstance(dt, tuple):
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self.params = Parameters({'value': 'PERIOD'})
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if (isinstance(dt, datetime) or isinstance(dt, time))\
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and getattr(dt, 'tzinfo', False):
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tzinfo = dt.tzinfo
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if tzinfo is not pytz.utc and\
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(tzutc is None or not isinstance(tzinfo, tzutc)):
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# set the timezone as a parameter to the property
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tzid = tzid_from_dt(dt)
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if tzid:
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self.params.update({'TZID': tzid})
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self.dt = dt
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def to_ical(self):
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dt = self.dt
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if isinstance(dt, datetime):
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return vDatetime(dt).to_ical()
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elif isinstance(dt, date):
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return vDate(dt).to_ical()
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elif isinstance(dt, timedelta):
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return vDuration(dt).to_ical()
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elif isinstance(dt, time):
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return vTime(dt).to_ical()
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elif isinstance(dt, tuple) and len(dt) == 2:
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return vPeriod(dt).to_ical()
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else:
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raise ValueError('Unknown date type: {}'.format(type(dt)))
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@classmethod
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def from_ical(cls, ical, timezone=None):
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if isinstance(ical, cls):
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return ical.dt
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u = ical.upper()
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if u.startswith(('P', '-P', '+P')):
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return vDuration.from_ical(ical)
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if '/' in u:
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return vPeriod.from_ical(ical)
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if len(ical) in (15, 16):
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return vDatetime.from_ical(ical, timezone=timezone)
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elif len(ical) == 8:
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return vDate.from_ical(ical)
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elif len(ical) in (6, 7):
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return vTime.from_ical(ical)
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else:
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raise ValueError(
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"Expected datetime, date, or time, got: '%s'" % ical
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)
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class vDate(object):
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"""Render and generates iCalendar date format.
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"""
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def __init__(self, dt):
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if not isinstance(dt, date):
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raise ValueError('Value MUST be a date instance')
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self.dt = dt
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self.params = Parameters({'value': 'DATE'})
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def to_ical(self):
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s = "%04d%02d%02d" % (self.dt.year, self.dt.month, self.dt.day)
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return s.encode('utf-8')
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@staticmethod
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def from_ical(ical):
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try:
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timetuple = (
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int(ical[:4]), # year
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int(ical[4:6]), # month
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int(ical[6:8]), # day
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)
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return date(*timetuple)
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except:
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raise ValueError('Wrong date format %s' % ical)
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class vDatetime(object):
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"""Render and generates icalendar datetime format.
|
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vDatetime is timezone aware and uses the pytz library, an implementation of
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|
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the Olson database in Python. When a vDatetime object is created from an
|
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ical string, you can pass a valid pytz timezone identifier. When a
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vDatetime object is created from a python datetime object, it uses the
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|
|
tzinfo component, if present. Otherwise an timezone-naive object is
|
||
|
|
created. Be aware that there are certain limitations with timezone naive
|
||
|
|
DATE-TIME components in the icalendar standard.
|
||
|
|
"""
|
||
|
|
def __init__(self, dt):
|
||
|
|
self.dt = dt
|
||
|
|
self.params = Parameters()
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
dt = self.dt
|
||
|
|
tzid = tzid_from_dt(dt)
|
||
|
|
|
||
|
|
s = "%04d%02d%02dT%02d%02d%02d" % (
|
||
|
|
dt.year,
|
||
|
|
dt.month,
|
||
|
|
dt.day,
|
||
|
|
dt.hour,
|
||
|
|
dt.minute,
|
||
|
|
dt.second
|
||
|
|
)
|
||
|
|
if tzid == 'UTC':
|
||
|
|
s += "Z"
|
||
|
|
elif tzid:
|
||
|
|
self.params.update({'TZID': tzid})
|
||
|
|
return s.encode('utf-8')
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def from_ical(ical, timezone=None):
|
||
|
|
tzinfo = None
|
||
|
|
if timezone:
|
||
|
|
try:
|
||
|
|
tzinfo = pytz.timezone(timezone)
|
||
|
|
except pytz.UnknownTimeZoneError:
|
||
|
|
if timezone in WINDOWS_TO_OLSON:
|
||
|
|
tzinfo = pytz.timezone(WINDOWS_TO_OLSON.get(timezone))
|
||
|
|
else:
|
||
|
|
tzinfo = _timezone_cache.get(timezone, None)
|
||
|
|
|
||
|
|
try:
|
||
|
|
timetuple = (
|
||
|
|
int(ical[:4]), # year
|
||
|
|
int(ical[4:6]), # month
|
||
|
|
int(ical[6:8]), # day
|
||
|
|
int(ical[9:11]), # hour
|
||
|
|
int(ical[11:13]), # minute
|
||
|
|
int(ical[13:15]), # second
|
||
|
|
)
|
||
|
|
if tzinfo:
|
||
|
|
return tzinfo.localize(datetime(*timetuple))
|
||
|
|
elif not ical[15:]:
|
||
|
|
return datetime(*timetuple)
|
||
|
|
elif ical[15:16] == 'Z':
|
||
|
|
return pytz.utc.localize(datetime(*timetuple))
|
||
|
|
else:
|
||
|
|
raise ValueError(ical)
|
||
|
|
except:
|
||
|
|
raise ValueError('Wrong datetime format: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vDuration(object):
|
||
|
|
"""Subclass of timedelta that renders itself in the iCalendar DURATION
|
||
|
|
format.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, td):
|
||
|
|
if not isinstance(td, timedelta):
|
||
|
|
raise ValueError('Value MUST be a timedelta instance')
|
||
|
|
self.td = td
|
||
|
|
self.params = Parameters()
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
sign = ""
|
||
|
|
if self.td.days < 0:
|
||
|
|
sign = "-"
|
||
|
|
self.td = -self.td
|
||
|
|
timepart = ""
|
||
|
|
if self.td.seconds:
|
||
|
|
timepart = "T"
|
||
|
|
hours = self.td.seconds // 3600
|
||
|
|
minutes = self.td.seconds % 3600 // 60
|
||
|
|
seconds = self.td.seconds % 60
|
||
|
|
if hours:
|
||
|
|
timepart += "%dH" % hours
|
||
|
|
if minutes or (hours and seconds):
|
||
|
|
timepart += "%dM" % minutes
|
||
|
|
if seconds:
|
||
|
|
timepart += "%dS" % seconds
|
||
|
|
if self.td.days == 0 and timepart:
|
||
|
|
return (compat.unicode_type(sign).encode('utf-8') + b'P' +
|
||
|
|
compat.unicode_type(timepart).encode('utf-8'))
|
||
|
|
else:
|
||
|
|
return (compat.unicode_type(sign).encode('utf-8') + b'P' +
|
||
|
|
compat.unicode_type(abs(self.td.days)).encode('utf-8') +
|
||
|
|
b'D' + compat.unicode_type(timepart).encode('utf-8'))
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def from_ical(ical):
|
||
|
|
try:
|
||
|
|
match = DURATION_REGEX.match(ical)
|
||
|
|
sign, weeks, days, hours, minutes, seconds = match.groups()
|
||
|
|
if weeks:
|
||
|
|
value = timedelta(weeks=int(weeks))
|
||
|
|
else:
|
||
|
|
value = timedelta(days=int(days or 0),
|
||
|
|
hours=int(hours or 0),
|
||
|
|
minutes=int(minutes or 0),
|
||
|
|
seconds=int(seconds or 0))
|
||
|
|
if sign == '-':
|
||
|
|
value = -value
|
||
|
|
return value
|
||
|
|
except:
|
||
|
|
raise ValueError('Invalid iCalendar duration: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vPeriod(object):
|
||
|
|
"""A precise period of time.
|
||
|
|
"""
|
||
|
|
def __init__(self, per):
|
||
|
|
start, end_or_duration = per
|
||
|
|
if not (isinstance(start, datetime) or isinstance(start, date)):
|
||
|
|
raise ValueError('Start value MUST be a datetime or date instance')
|
||
|
|
if not (isinstance(end_or_duration, datetime) or
|
||
|
|
isinstance(end_or_duration, date) or
|
||
|
|
isinstance(end_or_duration, timedelta)):
|
||
|
|
raise ValueError('end_or_duration MUST be a datetime, '
|
||
|
|
'date or timedelta instance')
|
||
|
|
by_duration = 0
|
||
|
|
if isinstance(end_or_duration, timedelta):
|
||
|
|
by_duration = 1
|
||
|
|
duration = end_or_duration
|
||
|
|
end = start + duration
|
||
|
|
else:
|
||
|
|
end = end_or_duration
|
||
|
|
duration = end - start
|
||
|
|
if start > end:
|
||
|
|
raise ValueError("Start time is greater than end time")
|
||
|
|
|
||
|
|
self.params = Parameters()
|
||
|
|
# set the timezone identifier
|
||
|
|
# does not support different timezones for start and end
|
||
|
|
tzid = tzid_from_dt(start)
|
||
|
|
if tzid:
|
||
|
|
self.params['TZID'] = tzid
|
||
|
|
|
||
|
|
self.start = start
|
||
|
|
self.end = end
|
||
|
|
self.by_duration = by_duration
|
||
|
|
self.duration = duration
|
||
|
|
|
||
|
|
def __cmp__(self, other):
|
||
|
|
if not isinstance(other, vPeriod):
|
||
|
|
raise NotImplementedError('Cannot compare vPeriod with %r' % other)
|
||
|
|
return cmp((self.start, self.end), (other.start, other.end))
|
||
|
|
|
||
|
|
def overlaps(self, other):
|
||
|
|
if self.start > other.start:
|
||
|
|
return other.overlaps(self)
|
||
|
|
if self.start <= other.start < self.end:
|
||
|
|
return True
|
||
|
|
return False
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
if self.by_duration:
|
||
|
|
return (vDatetime(self.start).to_ical() + b'/' +
|
||
|
|
vDuration(self.duration).to_ical())
|
||
|
|
return (vDatetime(self.start).to_ical() + b'/' +
|
||
|
|
vDatetime(self.end).to_ical())
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def from_ical(ical):
|
||
|
|
try:
|
||
|
|
start, end_or_duration = ical.split('/')
|
||
|
|
start = vDDDTypes.from_ical(start)
|
||
|
|
end_or_duration = vDDDTypes.from_ical(end_or_duration)
|
||
|
|
return (start, end_or_duration)
|
||
|
|
except:
|
||
|
|
raise ValueError('Expected period format, got: %s' % ical)
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
if self.by_duration:
|
||
|
|
p = (self.start, self.duration)
|
||
|
|
else:
|
||
|
|
p = (self.start, self.end)
|
||
|
|
return 'vPeriod(%r)' % (p, )
|
||
|
|
|
||
|
|
|
||
|
|
class vWeekday(compat.unicode_type):
|
||
|
|
"""This returns an unquoted weekday abbrevation.
|
||
|
|
"""
|
||
|
|
week_days = CaselessDict({
|
||
|
|
"SU": 0, "MO": 1, "TU": 2, "WE": 3, "TH": 4, "FR": 5, "SA": 6,
|
||
|
|
})
|
||
|
|
|
||
|
|
def __new__(cls, value, encoding=DEFAULT_ENCODING):
|
||
|
|
value = to_unicode(value, encoding=encoding)
|
||
|
|
self = super(vWeekday, cls).__new__(cls, value)
|
||
|
|
match = WEEKDAY_RULE.match(self)
|
||
|
|
if match is None:
|
||
|
|
raise ValueError('Expected weekday abbrevation, got: %s' % self)
|
||
|
|
match = match.groupdict()
|
||
|
|
sign = match['signal']
|
||
|
|
weekday = match['weekday']
|
||
|
|
relative = match['relative']
|
||
|
|
if weekday not in vWeekday.week_days or sign not in '+-':
|
||
|
|
raise ValueError('Expected weekday abbrevation, got: %s' % self)
|
||
|
|
self.relative = relative and int(relative) or None
|
||
|
|
self.params = Parameters()
|
||
|
|
return self
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return self.encode(DEFAULT_ENCODING).upper()
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
try:
|
||
|
|
return cls(ical.upper())
|
||
|
|
except:
|
||
|
|
raise ValueError('Expected weekday abbrevation, got: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vFrequency(compat.unicode_type):
|
||
|
|
"""A simple class that catches illegal values.
|
||
|
|
"""
|
||
|
|
|
||
|
|
frequencies = CaselessDict({
|
||
|
|
"SECONDLY": "SECONDLY",
|
||
|
|
"MINUTELY": "MINUTELY",
|
||
|
|
"HOURLY": "HOURLY",
|
||
|
|
"DAILY": "DAILY",
|
||
|
|
"WEEKLY": "WEEKLY",
|
||
|
|
"MONTHLY": "MONTHLY",
|
||
|
|
"YEARLY": "YEARLY",
|
||
|
|
})
|
||
|
|
|
||
|
|
def __new__(cls, value, encoding=DEFAULT_ENCODING):
|
||
|
|
value = to_unicode(value, encoding=encoding)
|
||
|
|
self = super(vFrequency, cls).__new__(cls, value)
|
||
|
|
if self not in vFrequency.frequencies:
|
||
|
|
raise ValueError('Expected frequency, got: %s' % self)
|
||
|
|
self.params = Parameters()
|
||
|
|
return self
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return self.encode(DEFAULT_ENCODING).upper()
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
try:
|
||
|
|
return cls(ical.upper())
|
||
|
|
except:
|
||
|
|
raise ValueError('Expected frequency, got: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vRecur(CaselessDict):
|
||
|
|
"""Recurrence definition.
|
||
|
|
"""
|
||
|
|
|
||
|
|
frequencies = ["SECONDLY", "MINUTELY", "HOURLY", "DAILY", "WEEKLY",
|
||
|
|
"MONTHLY", "YEARLY"]
|
||
|
|
|
||
|
|
# Mac iCal ignores RRULEs where FREQ is not the first rule part.
|
||
|
|
# Sorts parts according to the order listed in RFC 5545, section 3.3.10.
|
||
|
|
canonical_order = ("FREQ", "UNTIL", "COUNT", "INTERVAL",
|
||
|
|
"BYSECOND", "BYMINUTE", "BYHOUR", "BYDAY",
|
||
|
|
"BYMONTHDAY", "BYYEARDAY", "BYWEEKNO", "BYMONTH",
|
||
|
|
"BYSETPOS", "WKST")
|
||
|
|
|
||
|
|
types = CaselessDict({
|
||
|
|
'COUNT': vInt,
|
||
|
|
'INTERVAL': vInt,
|
||
|
|
'BYSECOND': vInt,
|
||
|
|
'BYMINUTE': vInt,
|
||
|
|
'BYHOUR': vInt,
|
||
|
|
'BYWEEKNO': vInt,
|
||
|
|
'BYMONTHDAY': vInt,
|
||
|
|
'BYYEARDAY': vInt,
|
||
|
|
'BYMONTH': vInt,
|
||
|
|
'UNTIL': vDDDTypes,
|
||
|
|
'BYSETPOS': vInt,
|
||
|
|
'WKST': vWeekday,
|
||
|
|
'BYDAY': vWeekday,
|
||
|
|
'FREQ': vFrequency,
|
||
|
|
})
|
||
|
|
|
||
|
|
def __init__(self, *args, **kwargs):
|
||
|
|
super(vRecur, self).__init__(*args, **kwargs)
|
||
|
|
self.params = Parameters()
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
result = []
|
||
|
|
for key, vals in self.sorted_items():
|
||
|
|
typ = self.types.get(key, vText)
|
||
|
|
if not isinstance(vals, SEQUENCE_TYPES):
|
||
|
|
vals = [vals]
|
||
|
|
vals = b','.join(typ(val).to_ical() for val in vals)
|
||
|
|
|
||
|
|
# CaselessDict keys are always unicode
|
||
|
|
key = key.encode(DEFAULT_ENCODING)
|
||
|
|
result.append(key + b'=' + vals)
|
||
|
|
|
||
|
|
return b';'.join(result)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def parse_type(cls, key, values):
|
||
|
|
# integers
|
||
|
|
parser = cls.types.get(key, vText)
|
||
|
|
return [parser.from_ical(v) for v in values.split(',')]
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
if isinstance(ical, cls):
|
||
|
|
return ical
|
||
|
|
try:
|
||
|
|
recur = cls()
|
||
|
|
for pairs in ical.split(';'):
|
||
|
|
try:
|
||
|
|
key, vals = pairs.split('=')
|
||
|
|
except ValueError:
|
||
|
|
# E.g. incorrect trailing semicolon, like (issue #157):
|
||
|
|
# FREQ=YEARLY;BYMONTH=11;BYDAY=1SU;
|
||
|
|
continue
|
||
|
|
recur[key] = cls.parse_type(key, vals)
|
||
|
|
return dict(recur)
|
||
|
|
except:
|
||
|
|
raise ValueError('Error in recurrence rule: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vText(compat.unicode_type):
|
||
|
|
"""Simple text.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __new__(cls, value, encoding=DEFAULT_ENCODING):
|
||
|
|
value = to_unicode(value, encoding=encoding)
|
||
|
|
self = super(vText, cls).__new__(cls, value)
|
||
|
|
self.encoding = encoding
|
||
|
|
self.params = Parameters()
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
return "vText('%s')" % self.to_ical()
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return escape_char(self).encode(self.encoding)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
ical_unesc = unescape_char(ical)
|
||
|
|
return cls(ical_unesc)
|
||
|
|
|
||
|
|
|
||
|
|
class vTime(object):
|
||
|
|
"""Render and generates iCalendar time format.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, *args):
|
||
|
|
if len(args) == 1:
|
||
|
|
if not isinstance(args[0], (time, datetime)):
|
||
|
|
raise ValueError('Expected a datetime.time, got: %s' % args[0])
|
||
|
|
self.dt = args[0]
|
||
|
|
else:
|
||
|
|
self.dt = time(*args)
|
||
|
|
self.params = Parameters({'value': 'TIME'})
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return self.dt.strftime("%H%M%S")
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def from_ical(ical):
|
||
|
|
# TODO: timezone support
|
||
|
|
try:
|
||
|
|
timetuple = (int(ical[:2]), int(ical[2:4]), int(ical[4:6]))
|
||
|
|
return time(*timetuple)
|
||
|
|
except:
|
||
|
|
raise ValueError('Expected time, got: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vUri(compat.unicode_type):
|
||
|
|
"""Uniform resource identifier is basically just an unquoted string.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __new__(cls, value, encoding=DEFAULT_ENCODING):
|
||
|
|
value = to_unicode(value, encoding=encoding)
|
||
|
|
self = super(vUri, cls).__new__(cls, value)
|
||
|
|
self.params = Parameters()
|
||
|
|
return self
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return self.encode(DEFAULT_ENCODING)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
try:
|
||
|
|
return cls(ical)
|
||
|
|
except:
|
||
|
|
raise ValueError('Expected , got: %s' % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vGeo(object):
|
||
|
|
"""A special type that is only indirectly defined in the rfc.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, geo):
|
||
|
|
try:
|
||
|
|
latitude, longitude = (geo[0], geo[1])
|
||
|
|
latitude = float(latitude)
|
||
|
|
longitude = float(longitude)
|
||
|
|
except:
|
||
|
|
raise ValueError('Input must be (float, float) for '
|
||
|
|
'latitude and longitude')
|
||
|
|
self.latitude = latitude
|
||
|
|
self.longitude = longitude
|
||
|
|
self.params = Parameters()
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return '%s;%s' % (self.latitude, self.longitude)
|
||
|
|
|
||
|
|
@staticmethod
|
||
|
|
def from_ical(ical):
|
||
|
|
try:
|
||
|
|
latitude, longitude = ical.split(';')
|
||
|
|
return (float(latitude), float(longitude))
|
||
|
|
except:
|
||
|
|
raise ValueError("Expected 'float;float' , got: %s" % ical)
|
||
|
|
|
||
|
|
|
||
|
|
class vUTCOffset(object):
|
||
|
|
"""Renders itself as a utc offset.
|
||
|
|
"""
|
||
|
|
|
||
|
|
ignore_exceptions = False # if True, and we cannot parse this
|
||
|
|
# component, we will silently ignore
|
||
|
|
# it, rather than let the exception
|
||
|
|
# propagate upwards
|
||
|
|
|
||
|
|
def __init__(self, td):
|
||
|
|
if not isinstance(td, timedelta):
|
||
|
|
raise ValueError('Offset value MUST be a timedelta instance')
|
||
|
|
self.td = td
|
||
|
|
self.params = Parameters()
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
|
||
|
|
if self.td < timedelta(0):
|
||
|
|
sign = '-%s'
|
||
|
|
td = timedelta(0) - self.td # get timedelta relative to 0
|
||
|
|
else:
|
||
|
|
# Google Calendar rejects '0000' but accepts '+0000'
|
||
|
|
sign = '+%s'
|
||
|
|
td = self.td
|
||
|
|
|
||
|
|
days, seconds = td.days, td.seconds
|
||
|
|
|
||
|
|
hours = abs(days * 24 + seconds // 3600)
|
||
|
|
minutes = abs((seconds % 3600) // 60)
|
||
|
|
seconds = abs(seconds % 60)
|
||
|
|
if seconds:
|
||
|
|
duration = '%02i%02i%02i' % (hours, minutes, seconds)
|
||
|
|
else:
|
||
|
|
duration = '%02i%02i' % (hours, minutes)
|
||
|
|
return sign % duration
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
if isinstance(ical, cls):
|
||
|
|
return ical.td
|
||
|
|
try:
|
||
|
|
sign, hours, minutes, seconds = (ical[0:1],
|
||
|
|
int(ical[1:3]),
|
||
|
|
int(ical[3:5]),
|
||
|
|
int(ical[5:7] or 0))
|
||
|
|
offset = timedelta(hours=hours, minutes=minutes, seconds=seconds)
|
||
|
|
except:
|
||
|
|
raise ValueError('Expected utc offset, got: %s' % ical)
|
||
|
|
if not cls.ignore_exceptions and offset >= timedelta(hours=24):
|
||
|
|
raise ValueError(
|
||
|
|
'Offset must be less than 24 hours, was %s' % ical)
|
||
|
|
if sign == '-':
|
||
|
|
return -offset
|
||
|
|
return offset
|
||
|
|
|
||
|
|
|
||
|
|
class vInline(compat.unicode_type):
|
||
|
|
"""This is an especially dumb class that just holds raw unparsed text and
|
||
|
|
has parameters. Conversion of inline values are handled by the Component
|
||
|
|
class, so no further processing is needed.
|
||
|
|
"""
|
||
|
|
def __new__(cls, value, encoding=DEFAULT_ENCODING):
|
||
|
|
value = to_unicode(value, encoding=encoding)
|
||
|
|
self = super(vInline, cls).__new__(cls, value)
|
||
|
|
self.params = Parameters()
|
||
|
|
return self
|
||
|
|
|
||
|
|
def to_ical(self):
|
||
|
|
return self.encode(DEFAULT_ENCODING)
|
||
|
|
|
||
|
|
@classmethod
|
||
|
|
def from_ical(cls, ical):
|
||
|
|
return cls(ical)
|
||
|
|
|
||
|
|
|
||
|
|
class TypesFactory(CaselessDict):
|
||
|
|
"""All Value types defined in rfc 2445 are registered in this factory
|
||
|
|
class.
|
||
|
|
|
||
|
|
The value and parameter names don't overlap. So one factory is enough for
|
||
|
|
both kinds.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, *args, **kwargs):
|
||
|
|
"Set keys to upper for initial dict"
|
||
|
|
super(TypesFactory, self).__init__(*args, **kwargs)
|
||
|
|
self.all_types = (
|
||
|
|
vBinary,
|
||
|
|
vBoolean,
|
||
|
|
vCalAddress,
|
||
|
|
vDDDLists,
|
||
|
|
vDDDTypes,
|
||
|
|
vDate,
|
||
|
|
vDatetime,
|
||
|
|
vDuration,
|
||
|
|
vFloat,
|
||
|
|
vFrequency,
|
||
|
|
vGeo,
|
||
|
|
vInline,
|
||
|
|
vInt,
|
||
|
|
vPeriod,
|
||
|
|
vRecur,
|
||
|
|
vText,
|
||
|
|
vTime,
|
||
|
|
vUTCOffset,
|
||
|
|
vUri,
|
||
|
|
vWeekday,
|
||
|
|
vCategory,
|
||
|
|
)
|
||
|
|
self['binary'] = vBinary
|
||
|
|
self['boolean'] = vBoolean
|
||
|
|
self['cal-address'] = vCalAddress
|
||
|
|
self['date'] = vDDDTypes
|
||
|
|
self['date-time'] = vDDDTypes
|
||
|
|
self['duration'] = vDDDTypes
|
||
|
|
self['float'] = vFloat
|
||
|
|
self['integer'] = vInt
|
||
|
|
self['period'] = vPeriod
|
||
|
|
self['recur'] = vRecur
|
||
|
|
self['text'] = vText
|
||
|
|
self['time'] = vTime
|
||
|
|
self['uri'] = vUri
|
||
|
|
self['utc-offset'] = vUTCOffset
|
||
|
|
self['geo'] = vGeo
|
||
|
|
self['inline'] = vInline
|
||
|
|
self['date-time-list'] = vDDDLists
|
||
|
|
self['categories'] = vCategory
|
||
|
|
|
||
|
|
#################################################
|
||
|
|
# Property types
|
||
|
|
|
||
|
|
# These are the default types
|
||
|
|
types_map = CaselessDict({
|
||
|
|
####################################
|
||
|
|
# Property value types
|
||
|
|
# Calendar Properties
|
||
|
|
'calscale': 'text',
|
||
|
|
'method': 'text',
|
||
|
|
'prodid': 'text',
|
||
|
|
'version': 'text',
|
||
|
|
# Descriptive Component Properties
|
||
|
|
'attach': 'uri',
|
||
|
|
'categories': 'categories',
|
||
|
|
'class': 'text',
|
||
|
|
'comment': 'text',
|
||
|
|
'description': 'text',
|
||
|
|
'geo': 'geo',
|
||
|
|
'location': 'text',
|
||
|
|
'percent-complete': 'integer',
|
||
|
|
'priority': 'integer',
|
||
|
|
'resources': 'text',
|
||
|
|
'status': 'text',
|
||
|
|
'summary': 'text',
|
||
|
|
# Date and Time Component Properties
|
||
|
|
'completed': 'date-time',
|
||
|
|
'dtend': 'date-time',
|
||
|
|
'due': 'date-time',
|
||
|
|
'dtstart': 'date-time',
|
||
|
|
'duration': 'duration',
|
||
|
|
'freebusy': 'period',
|
||
|
|
'transp': 'text',
|
||
|
|
# Time Zone Component Properties
|
||
|
|
'tzid': 'text',
|
||
|
|
'tzname': 'text',
|
||
|
|
'tzoffsetfrom': 'utc-offset',
|
||
|
|
'tzoffsetto': 'utc-offset',
|
||
|
|
'tzurl': 'uri',
|
||
|
|
# Relationship Component Properties
|
||
|
|
'attendee': 'cal-address',
|
||
|
|
'contact': 'text',
|
||
|
|
'organizer': 'cal-address',
|
||
|
|
'recurrence-id': 'date-time',
|
||
|
|
'related-to': 'text',
|
||
|
|
'url': 'uri',
|
||
|
|
'uid': 'text',
|
||
|
|
# Recurrence Component Properties
|
||
|
|
'exdate': 'date-time-list',
|
||
|
|
'exrule': 'recur',
|
||
|
|
'rdate': 'date-time-list',
|
||
|
|
'rrule': 'recur',
|
||
|
|
# Alarm Component Properties
|
||
|
|
'action': 'text',
|
||
|
|
'repeat': 'integer',
|
||
|
|
'trigger': 'duration',
|
||
|
|
# Change Management Component Properties
|
||
|
|
'created': 'date-time',
|
||
|
|
'dtstamp': 'date-time',
|
||
|
|
'last-modified': 'date-time',
|
||
|
|
'sequence': 'integer',
|
||
|
|
# Miscellaneous Component Properties
|
||
|
|
'request-status': 'text',
|
||
|
|
####################################
|
||
|
|
# parameter types (luckily there is no name overlap)
|
||
|
|
'altrep': 'uri',
|
||
|
|
'cn': 'text',
|
||
|
|
'cutype': 'text',
|
||
|
|
'delegated-from': 'cal-address',
|
||
|
|
'delegated-to': 'cal-address',
|
||
|
|
'dir': 'uri',
|
||
|
|
'encoding': 'text',
|
||
|
|
'fmttype': 'text',
|
||
|
|
'fbtype': 'text',
|
||
|
|
'language': 'text',
|
||
|
|
'member': 'cal-address',
|
||
|
|
'partstat': 'text',
|
||
|
|
'range': 'text',
|
||
|
|
'related': 'text',
|
||
|
|
'reltype': 'text',
|
||
|
|
'role': 'text',
|
||
|
|
'rsvp': 'boolean',
|
||
|
|
'sent-by': 'cal-address',
|
||
|
|
'tzid': 'text',
|
||
|
|
'value': 'text',
|
||
|
|
})
|
||
|
|
|
||
|
|
def for_property(self, name):
|
||
|
|
"""Returns a the default type for a property or parameter
|
||
|
|
"""
|
||
|
|
return self[self.types_map.get(name, 'text')]
|
||
|
|
|
||
|
|
def to_ical(self, name, value):
|
||
|
|
"""Encodes a named value from a primitive python type to an icalendar
|
||
|
|
encoded string.
|
||
|
|
"""
|
||
|
|
type_class = self.for_property(name)
|
||
|
|
return type_class(value).to_ical()
|
||
|
|
|
||
|
|
def from_ical(self, name, value):
|
||
|
|
"""Decodes a named property or parameter value from an icalendar
|
||
|
|
encoded string to a primitive python type.
|
||
|
|
"""
|
||
|
|
type_class = self.for_property(name)
|
||
|
|
decoded = type_class.from_ical(value)
|
||
|
|
return decoded
|