Editing Build attributes.pl

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'''build_attributes.pl''' allows for manipulating attributes before elements are created This function is called from perl_lib/EPrints/XML.pm sub create_element if present in configuration.

The examples below will allow for attributes to be manipulated with the following structure:
# Look for the attribute value in config, i.e. <code>$c</code>
# Apply any changes to that specific value i.e. either replace or add to it.
# If there are multiple attribute values it will cycle through them and repeat the above.

==Examples==
* A class addition, useful for adding framework css classes
 push @{$c->{config_attrs}->{class}->{"ep_search_controls"}}, ({ class => "framework-class", _change_action => "replace" });
* A change to the elements id attribute, useful for overwriting layered css
 push @{$c->{config_attrs}->{id}->{"ep_id_for_elem"}}, ({ id => "new_id", _change_action => "replace" });
* Adding a new data attribute, useful for adding in accessibility attributes
 push @{$c->{config_attrs}->{id}->{"ep_id_for_elem"}}, ({ "data_info" => "data-info" });
* Creating a classname based on user account type
 push @{$c->{config_attrs}->{class}->{"ep_page_thing"}}, ({ class => sub {
     my $repo = shift @_;
     if ( defined $repo->current_user && $repo->current_user->is_staff )
     {
         return "staff-member-class";
     }
     else
     {
         return "non-staff-class";
     }
 }, _change_action => "replace" });