# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1310941735 -7200
# Node ID 65a2a2bd4ea48507dcc0e82d8f9dba9b95e1c032
# Parent  7bf9f6bf5ad53c3efd7ed77aa6647fecc4154c50
Added a script that converts iCalendar resources to event pages, writing such
pages (containing multiple events) to standard output.

diff -r 7bf9f6bf5ad5 -r 65a2a2bd4ea4 scripts/ics2page.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/ics2page.py	Mon Jul 18 00:28:55 2011 +0200
@@ -0,0 +1,114 @@
+# -*- coding: iso-8859-1 -*-
+"""
+    MoinMoin - Conversion of iCalendar resources to event pages
+
+    @copyright: 2011 by Paul Boddie <paul@boddie.org.uk>
+
+    @license: GNU GPL (v2 or later), see COPYING.txt for details.
+"""
+
+from collections import defaultdict
+from EventAggregatorSupport import Date
+import vCalendar
+import codecs
+import re
+
+date_regexp_str = ur'(?P<year>[0-9]{4})(?P<month>[0-9]{2})(?P<day>[0-9]{2})'
+time_regexp_str = ur'(?P<hour>[0-2][0-9])(?P<minute>[0-5][0-9])(?:(?P<second>[0-6][0-9]))?'
+
+date_regexp = re.compile(date_regexp_str, re.UNICODE)
+time_regexp = re.compile(time_regexp_str, re.UNICODE)
+
+def convert(value, pattern):
+    match = pattern.match(value)
+    if match:
+        return match.groups()
+    else:
+        return [value]
+
+def convert_date(value, end=0):
+    fields = convert(value, date_regexp)
+    if len(fields) == 1:
+        return value
+    else:
+        date = Date(map(int, fields))
+        if end:
+            date = date.day_update(-1)
+        return str(date)
+
+def convert_time(value):
+    fields = convert(value, time_regexp)
+    if len(fields) == 1:
+        return value
+    else:
+        return ":".join(fields)
+
+def convert_to_time_and_zone(value):
+    for sign in ("-", "+", " "):
+        parts = value.split(sign)
+        if len(parts) > 1:
+            return parts[0], (sign + parts[1]).lstrip()
+    return value, ""
+
+def convert_datetime(value, end=0):
+    parts = value.split("T")
+    if len(parts) == 1:
+        return convert_date(value, end)
+    else:
+        date, time = parts[:2]
+        if value.endswith("Z"):
+            time, zone = time[:-1], "UTC"
+        else:
+            time, zone = convert_to_time_and_zone(time)
+        return "%s %s %s" % (convert_date(date), convert_time(time), zone)
+
+def parse_event(it):
+    event = defaultdict(unicode)
+
+    for name, parameters, value in it:
+        if name == "END" and value == "VEVENT":
+            break
+        if name.startswith("DT"):
+            value = convert_datetime(value, name == "DTEND")
+        event[name] = value
+
+    return event
+
+if __name__ == "__main__":
+    import os, sys
+    progname = os.path.split(sys.argv[0])[-1]
+
+    try:
+        it = vCalendar.iterparse(sys.argv[1])
+    except IndexError:
+        print >>sys.stderr, "Usage: %s <iCalendar filename>" % progname
+        sys.exit(1)
+
+    events = []
+
+    for name, parameters, value in it:
+        if name == "BEGIN" and value == "VEVENT":
+            event = parse_event(it)
+            event["DTEND"] = event["DTEND"] or event["DTSTART"]
+            events.append(event)
+
+    out = codecs.getwriter("utf-8")(sys.stdout)
+
+    for event in events:
+        out.write(u"""
+== %(SUMMARY)s ==
+
+ Start:: %(DTSTART)s
+ End:: %(DTEND)s
+ Summary:: %(SUMMARY)s
+ Topics:: %(CATEGORIES)s
+ Location:: %(LOCATION)s
+ URL:: %(URL)s
+""" % event)
+
+    out.write("""
+----
+CategoryEvents
+""")
+
+# vim: tabstop=4 expandtab shiftwidth=4