-class InvalidICS(Exception): pass
-class IncompleteICS(InvalidICS): pass
-
-def lineJoiner(oldcal, encoding='utf-8'):
- '''Takes a string containing a calendar and returns an array of its lines'''
- try:
- oldcal = unicode(oldcal, encoding)
- oldcal = oldcal.replace('\r\n ', '').replace('\r\n\t','')
- except UnicodeDecodeError:
- # This is probably a file with badly folded lines
- oldcal = oldcal.replace('\r\n ', '').replace('\r\n\t','')
- try: oldcal = unicode(oldcal, encoding)
- except UnicodeDecodeError:
- sys.stderr.write('Malformed File')
- raise
-
- if not oldcal[0:15] == 'BEGIN:VCALENDAR':
- raise InvalidICS, "Does not appear to be a valid ICS file"
-
- if not 'END:VCALENDAR' in oldcal[-15:-1]:
- raise IncompleteICS, "File appears to be incomplete"
-
- if list(oldcal) == oldcal:
- oldcal = '\r\n'.join(oldcal)
-
- return oldcal.split('\r\n')
-
-
-def lineFolder(oldcal, length=75):
- '''Folds content lines to a specified length, returns a list'''
-
- if length > 75:
- sys.stderr.write('WARN: lines > 75 octets are not RFC compliant\n')
-
- cal = []
- sl = length - 1
-
- for uline in oldcal:
- line = uline.encode('utf-8')
-
- # Line fits inside length, do nothing
- if len(line) <= length:
- cal.append(line)
-
- else:
- ll = length
- foldedline = []
- while uline:
- ufold = unicode(line[0:ll], 'utf-8', 'ignore')
- fold = ufold.encode('utf-8')
- uline = uline.replace(ufold,u'',1)
- line = uline.encode('utf-8')
- foldedline.append(fold)
-
- # Subsequent lines are shorter as they include a space
- ll = length - 1
- cal.append('\r\n '.join(foldedline))
-
- return cal
-
-
-def splitFields(cal):
- '''Takes a list of lines in a calendar file and returns a list of tuples
- as (key, value) pairs'''
-
- ical = []
-
- # Check that we got 2 items on every line
- for line in [tuple(x.split(':',1)) for x in cal]:
- if not len(line) == 2 and line[0]:
- raise InvalidICS, 'Unusual content line: %s'%line
- elif line[0]:
- ical.append(line)
-
- return ical
-
-
-def joinFields(ical):
- '''Takes a list of tuples that make up a calendar file and returns it to a
- list of lines'''
-
- return [':'.join(x) for x in ical]
-
-