[kronolith] WebDAV backend!

[Jan Schneider]

Zitat von Johan Ekblad <jka at eminds.se>:

> Hi. I'm new to this list and I'm planning to build a WebDAV backend
> using iCal for Kronolith. My goal is that Kronolith may read and write
> Calendar entries to a ics-file placed on a WebDAV server (For example
> apache with only the mod_dav and mod_dav_fs extensions) so that for
> example Sunbird and Kronolith may use the same Calendar.
>
> In the future the code may be used for someone implementing support
> against a CalDAV server (but right now I'm planning to start with WebDAV)

Please note that we are working (slowly) on making Kronolith a  
WebDAV/CalDAV *server*, which makes more sense IMO. But that shouldn't  
keep you from creating a WebDAV *client* driver for Kronolith.

> I would like a few questions answered.
>
> In the TODO-list there are two points:
>
> ------------
>
> - Remove the assumption that each calendar is using the same backend.
> Ideally it should be possible to have a local calendar using sql or
> kolab and a remote calendar using another driver (eg wcap or whatever
> mozilla uses).
>
> Is it OK to assume the same backend (WedDAV/iCAL) for all calendars in
> my implementation?

Yes, because that's what we still do in all the other drivers.

> - Allow publishing calendars to a remote site as iCalendar files.
>
> This is a different, since it only exports a Calendar to a WebDAV
> server, but I guess some of my code may be used to implement this.

Correct.

> As I understand it, all the Kolab backend-operations end up in
> IMAP-calls against the Kolab server, so no calendar info is kept in a
> local Kronolith database.

True.

> Maybe a more simple approach is to cache the calendar in a local SQL
> database and only read/write to the WebDAV server when you write/refresh
> this calender. This is easier to implement and maybe faster than
> accessing a remote WebDAV server each time. What do you think?

That makes sense, but it should be optional. If you are going to do  
that, you should extend Kronolith_Driver_sql with your new driver.

Jan.

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