Add ical to remind converter

diff --git a/ical2rem.py b/ical2rem.py
new file mode 100755 (executable)
index 0000000..021c90f
--- /dev/null
+++ b/ical2rem.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+
+# Dan White <dan@whiteaudio.com>
+
+# public domain
+
+import datetime
+import sys
+import time
+
+import pytz
+import vobject
+
+#testing
+#sys.argv[1] = 'basic.ics'
+#sys.argv.append('-')
+
+centralTime = pytz.timezone('America/Chicago')
+
+datefmt = '%b %d %Y'
+timefmt = '%H:%M'
+remfmt_datetime = 'REM %s AT %s DURATION %s MSG %%"%s%%" [t()]%%'
+remfmt_date = 'REM %s *1 UNTIL %s MSG %%"%s%%" [t()]%%'
+
+# one year out
+fromDate = datetime.datetime(2010,1,1, tzinfo=centralTime)
+untilDate = fromDate + datetime.timedelta(days=365.25*4)
+
+if sys.argv[1] == '-':
+    infile = sys.stdin
+else:
+    infile = open(sys.argv[1])
+
+if sys.argv[2] == '-':
+    outfile = sys.stdout
+else:
+    outfile = open(sys.argv[2], 'wb')
+    
+cal = vobject.readOne(infile)
+
+
+for event in cal.vevent_list:
+    text = event.summary.value
+
+    #print event
+
+    # TODO: handle all-day events of +1 day duration
+
+    #detect all-day events vs. times
+    if isinstance(event.dtstart.value, datetime.datetime):
+        dtstart = event.dtstart.value.astimezone(centralTime)
+        dtend = event.dtend.value.astimezone(centralTime)
+    elif isinstance(event.dtstart.value, datetime.date):
+        #cannot handle this yet
+        continue
+        #dtstart = event.dtstart.value
+        #dtend = event.dtend.value
+    else:
+        raise TypeError('unknown dtstart type: %s (%s)' % 
+                        (event.dtstart.value, type(event.dtstart.value)))
+
+    duration = str(dtend - dtstart)[:-3]
+
+
+    if event.rruleset:
+        for dtstart in event.rruleset.between(fromDate, untilDate, inc=True):
+            print >>outfile, remfmt_datetime % (
+                 dtstart.strftime(datefmt),
+                 dtstart.strftime(timefmt),
+                 duration, text)
+    else:
+        print >>outfile, remfmt_datetime % (
+             dtstart.strftime(datefmt),
+             dtstart.strftime(timefmt),
+             duration, text)
+
+
+
+