Re: [Evolution] boolean searches - expression example

[Thomas Frayne <tomf sjpc org>]

On Wed, 2003-07-16 at 08:23, Dan Winship wrote:
> On Wed, 2003-07-16 at 10:55, Edward Muller wrote:
> > Thanks!
> >
> > So I think what I really need now is a list of
> > tokens/variables/functions that evolution provides in the namespace of
> > the scheme expressions ...
> >
> > For instance, until I looked there I didn't know about:
> > header-ends-with
> > header-contains
> > ${subject}
> > ${recipient}
> > etc....
>
> The variables refer to the fields defined by the rest of the xml. Eg, in
>
>       <code>(match-all (header-contains "From" ${sender}))</code>
>
> the ${sender} refers to the:
>
>       <input type="string" name="sender"/>
>
> later on. It just tells the vfolder editor how to put the expression
> together based on the various fields. You would need to replace it with
> a literal string in your own expressions. (And if you can't figure out
> what the string would be, for something like the date filters, etc, just
> create a vfolder and then look at ~/evolution/vfolders.xml.)
>
> -- Dan


I looked in:
/usr/share/evolution/vfoldertypes.xml
~/evolution/vfolders.xml

Using a combination of your hints and guesswork, I constructed a simple
vfolder with an expression, and then a more complex one.  The detailed
example is: 

Rule name: Exp

if all criteria are met

Expression (match-all 
(and
 (or
   (header-contains "From" "Muller")
   (header-contains "From" "TomF")
   (header-contains "From" "Eric")

 )
 (or
   (header-contains "To" "TomF")
   (header-contains "Subject" "boolean")
   (header-contains "Subject" "custom")
 )
))

Date sent is after 2 days ago

Specific folders only

vfolder:/home/tom/evolution/vfolder#Tom important recent unread


The Exp vfolder displayed all messages from the "Tom important recent
unread" vfolder that were sent after 2 days ago, were from one of TomF,
Eric, or Muller, and were either to TomF, or had boolean or custom in
the subject.


Note that Evolution is weak on syntax checking:  my first try at a
complex expression crashed because of a missing parenthesis.  I
submitted bug report http://bugzilla.ximian.com/show_bug.cgi?id=46463

Also, the vfolder editor has too little space for an expression, so I
used gedit to build the expression, and pasted it into the vfolder
editor.