me, 2.0: sandy and ICS

me, 2.0: jose nazario beauty and the street

sandy and ICS

Sandy - your free personal email assistant

"sandy" is a free personal inbox assistant. the goal of sandy is to bridge human readable emails to reminders. it's built on the stikkit backend.

some cool stuff, i have been using it for a bit. i recently saw that sandy should be able to take an ICS request and handle it, but it's always failed for me. so i solved the problem with a workaround, a python script that gets fed by procmail and feeds sandy.

#!/usr/bin/python

# icsparse 2008 jose nazario

import email, getopt, os, smtplib, sys, time

# edit this for your sandy setup
# if you don't have one, see http://iwantsandy.com/
SANDYADDR = 'FOOBAR@ME.iwantsandy.com'
FROM = 'ME@arbor.net'

def notify_sandy(meeting):
    s = smtplib.SMTP('localhost')
    msg = """Subject: reminder
To: %s
From: %s

%s
""" % (SANDYADDR, FROM, meeting)
    s.sendmail(FROM, (SANDYADDR, FROM,), msg)
    del(s)

class Event(object):
    def __init__(self, request):
        self.start=False
        self.end=False
        self.about=False
        self.location=False
        self.tags = ['@office', ]
        self.parse(request)

    def __repr__(self):
        if self.location: location = 'location: %s' % self.location
        else: location = ''
        return 'remind me that %s on %s until %s %s %s' % \
               (self.about, time.strftime('%D at %R', self.start),
                time.strftime('%D at %R', self.end), location,
                ' '.join(self.tags))

    def valueOf(self, line):
        return line.split(':', 1)[-1]

    def parse(self, request):
        # remove \r for windows ...
        lines = [ x.strip() for x in request.split('\n') ]
        if 'BEGIN:VEVENT' not in lines: return
        inevent = False
        for line in lines:
            if line.startswith('SUMMARY:'):
                line = line.strip().replace('\\N', '')
                about = line.split(':', 1)
                if len(about) != 2: self.about = ''
                else: self.about = about[1]
            if line == 'BEGIN:VEVENT':
                inevent = True
                continue
            if line == 'END:VEVENT':
                inevent = False
                continue
            if not inevent: continue
            if line.startswith('DTSTART'):
                self.start = time.strptime(self.valueOf(line), '%Y%m%dT%H%M%S')
            if line.startswith('DTEND'):
                self.end = time.strptime(self.valueOf(line), '%Y%m%dT%H%M%S')
            if line.startswith('LOCATION'):
                self.location = self.valueOf(line)
            if line.startswith('RRULE:FREQ='):
                for field in line.replace('RRULE:', '').split(';'):
                    if field.startswith('FREQ='):
                        f = field.split('=')[1].lower()
                        self.tags.append('@%s' % f)

def usage(usagestr):
    print usagestr
    sys.exit(1)

def main():
    usagestr = """icsparse
parses ICS events into Sandy reminder

reads an RFC822 mbox message via stdin and adds them to your Sandy reminder"""

    try: opts, args = getopt.getopt(sys.argv[1:], 'h')
    except: usage(usagestr)

    for o, a in opts:
        if o == '-h': usage(usagestr)

    try:
        msgfile = args[1]
        fp = open(msgfile)
    except IndexError: fp = sys.stdin
    msg = email.message_from_file(fp)
    fp.close()

    for part in msg.walk():
        if part.get_content_maintype() == 'multipart': continue
        if 'Content-Type' not in part.keys(): continue
        found = False
        # look for common meeting markers: 
        # - meeting.ics as an attachment name
        # - Content-Type:text/calendar
        for calpart in ('name="meeting.ics"', 'text/calendar',):
            if calpart in part['Content-Type']: found = True
        if not found: continue
        payload = part.get_payload(decode=True)
        event = Event(payload)
        if not event.about: pass
        else:
            # print event
            notify_sandy(str(event))

if __name__ == '__main__':
    main()

and this is how i feed it via procmail on my inbox:

:0
* BEGIN:VCALENDAR|Content-Class: *urn:content-classes:calendarmessage|Content-Type: *text/calendar|name="meeting.ics"

        :0 c
        |/home/jose/icsparse.py

voila, my problem is solved.

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Last modified: Thursday, Mar 06, 2008 @ 12:34pm

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