Building a CalDAV-server in PHP?

Question

Ok, so I'm the author of a CMS and I'm interested in building a CalDAV-server that enables the user to interface with my CMS through CalDAV instead of only through the web, so they can see their calendars, add todos and things like that.

I've looked at http://www.davical.org/ which is a CalDAV service built in PHP, but it has its own database and I already have the DB stuff done and just want a middle-layer services that translates, both ways, to and from my databases using my functions.

Any ideas?

Answer 1

SavreDAV http://code.google.com/p/sabredav/ can be of some help.

Answer 2

I think that iCalendar file format is the thing You are looking for. There are some php libraries (link text) which should help you to create such a files.

Answer 3

Use Wireshark to discover protocoll (much XML).

It's easy if you want to deliver only simple iCal-Files. For "View only" an iCal file is enough, no CalDav needed, but for adding ToDos etc. CalDav is necessary.