From 2d301d7401263907114e234cd1de5ace7acf723c Mon Sep 17 00:00:00 2001 From: James French Date: Sun, 1 Aug 2010 13:44:48 +0800 Subject: [PATCH] Initial Commit, includes folding and unfolding lines --- icalparse.py | 89 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 89 insertions(+) create mode 100755 icalparse.py diff --git a/icalparse.py b/icalparse.py new file mode 100755 index 0000000..5c3a34f --- /dev/null +++ b/icalparse.py @@ -0,0 +1,89 @@ +#!/usr/bin/python +# +# Copyright (c) 2010 James French +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +# THE SOFTWARE. + +import sys +import re + +try: + import httplib2 + urllib = False +except ImportError: + try: + import urllib + urllib = True + except: + sys.stderr.write('Failed to find a suitable http downloader\n') + raise + +class InvalidICS(Exception): pass +class notJoined(Exception): pass + +# RFC5545 and RFC5546 iCalendar registries contain upper case letters +# and dashes only and are separated from the value by a colon (:) +itemstart = re.compile('^[A-Z\-]+:.*') +def lineJoiner(oldcal): + '''Unfolds a calendar so that items can be parsed''' + + cal = [] + + # Strip newlines ( + for line in oldcal: + line = line.rstrip('\r\n') + + # Reassemble broken Lines + if not line: + if not cal: continue + else: cal[-1] += '\\n' + elif line[0] == ' ': + if not cal: raise InvalidICS, 'First line of ICS must be element' + line = line[1:len(line)] + cal[-1] += line + elif not itemstart.match(line): + if not cal: raise InvalidICS, 'First line of ICS must be element' + cal[-1] += '\\n' + line + else: + if cal: cal[-1] += '\r\n' + cal.append(line) + + cal[-1] += '\r\n' + + return cal + +def lineSplitter(oldcal, length=75): + '''Folds content lines to a specified length, returns a list''' + + cal = [] + sl = length - 1 + + for line in oldcal: + # Line & line ending line ending fit inside length, do nothing + if len(line.rstrip()) <= length: + cal.append(line) + else: + brokenline = [line[0:length] + '\r\n'] + ll = length + while ll < len(line.rstrip('\r\n')) + 1: + brokenline.append(' ' + line[ll:sl+ll].rstrip('\r\n') + '\r\n') + ll += sl + cal += brokenline + + return cal -- 2.20.1