Editing Create Export Plugins (section)

===Registration===

The top of the plugin should look like this:
<pre>
 package EPrints::Plugin::Export::DepositorActivity;
 
 use Unicode::String qw( utf8 );
 use EPrints::Plugin::Export;
 use EPrints::DataObj::User;
 @ISA = ( "EPrints::Plugin::Export" );
 use strict;
 
 sub new
 {
        my( $class, %params ) = @_;
 
        my $self = $class->SUPER::new( %params );
 
        $self->{name} = "Depositor Activity";
        $self->{accept} = [ 'list/eprint', 'dataobj/eprint' ];
        $self->{visible} = "all";
        $self->{suffix} = ".csv";
        $self->{mimetype} = "text/csv";
 
        return $self;
 }
</pre>
This will create a filter object, and set a number of configuration constants:

* name - The name of the filter
* accept - A list detailing what the filter will take as inputs.  In this case, a list of eprints or a single eprint.  It is possible to write filters for dataobj types 'eprint', 'user', 'subject', 'history', 'access' and '*' (all).
* visible - Who can see this filter.  It's set to 'all' above so that anyone can use it.  It could be set to 'staff' to only allow repository staff to use it.  If set to 'API' then the filter is not available through the web interface.
* suffix - Appended to the url to create a filename extension.
* mimetype - Should be set to the correct mime type for the output of the filter.

Note that 'name' and 'accept' are essential.  These allow the filter to register itself with EPrints.

We will be extracting the username of the depositor, so we need to use 'EPrints::DataObj::User'.