5 # Permission is hereby granted, free of charge, to any person obtaining a copy
6 # of this software and associated documentation files (the "Software"), to deal
7 # in the Software without restriction, including without limitation the rights
8 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 # copies of the Software, and to permit persons to whom the Software is
10 # furnished to do so, subject to the following conditions:
12 # The above copyright notice and this permission notice shall be included in
13 # all copies or substantial portions of the Software.
15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 from optparse import OptionParser
27 class InvalidICS(Exception): pass
28 class notJoined(Exception): pass
30 # RFC5545 and RFC5546 iCalendar registries contain upper case letters
31 # and dashes only and are separated from the value by a colon (:)
32 icalEntry = re.compile('^[A-Z\-]+:.*')
34 def lineJoiner(oldcal):
35 '''Unfolds a calendar so that items can be parsed'''
41 line = line.rstrip('\r\n')
43 # Reassemble broken Lines
46 else: cal[-1] += '\\n'
48 if not cal: raise InvalidICS, 'First line of ICS must be element'
49 line = line[1:len(line)]
51 elif not icalEntry.match(line):
52 if not cal: raise InvalidICS, 'First line of ICS must be element'
53 cal[-1] += '\\n' + line
55 if cal: cal[-1] += '\r\n'
62 def lineSplitter(oldcal, length=75):
63 '''Folds content lines to a specified length, returns a list'''
69 # Line & line ending line ending fit inside length, do nothing
70 if len(line.rstrip()) <= length:
73 brokenline = [line[0:length] + '\r\n']
75 while ll < len(line.rstrip('\r\n')) + 1:
76 brokenline.append(' ' + line[ll:sl+ll].rstrip('\r\n') + '\r\n')
82 if __name__ == '__main__':
83 # If the user passed us a 'stdin' argument, we'll go with that,
84 # otherwise we'll try for a url opener
86 parser = OptionParser()
87 parser.add_option('-s', '--stdin', action='store_true', dest='stdin',
88 default=False, help='Take a calendar from standard input')
89 parser.add_option('-o', '--output', dest='outfile', default='',
90 help='Specify output file (defaults to standard output)')
92 (options, args) = parser.parse_args()
103 sys.stderr.write('Failed to find a suitable http downloader\n')