Bug 7345: Enable exporting records sans private fields

Add an option for marcstd to the opac-export.pl and catalogue/export.pl
scripts. This new format removes all 9XX, X9X, XX9 fields and subfield $9
(with the exception of 490 in flavours of MARC other than UNIMARC). The work is
done in C4::Record::marc2marc.

This patch adds the new export option 'marcstd' for exporting MARC
records without 9xx, x9x and xx9 fields and subfields to the staff
detail page.

Testing plan:
1. Export a record in "MARC (Unicode/UTF-8)" format as a control
2. In the OPAC, run the following jQuery to add the marcstd option to the UI:
> $("#export #format").append("<option value='marcstd'>MARC (no 9xx)</option>");
3. Export the same record in "MARC (no 9xx)" format
4. Compare the two, noticing that any subfield $9 or fields including 9 (other
   than 490 in flavours of MARC other than UNIMARC) have been removed

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Works as advertised now.
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Signed-off-by: Jared Camins-Esakov <jcamins@cpbibliography.com>
This patch squashes both the original patch and Katrin's follow-up adding
marcstd as an export option on the staff client.

Feb 13, 2012 (marcel): Amended this patch to resolved two definitions of $error in catalogue/export script.

C4/Record.pm

@@ -77,7 +77,32 @@ Returns an ISO-2709 scalar
 
 sub marc2marc {
 	my ($marc,$to_flavour,$from_flavour,$encoding) = @_;
-	my $error = "Feature not yet implemented\n";
+	my $error;
+    if ($to_flavour =~ m/marcstd/) {
+        my $marc_record_obj;
+        if ($marc =~ /^MARC::Record/) { # it's already a MARC::Record object
+            $marc_record_obj = $marc;
+        } else { # it's not a MARC::Record object, make it one
+            eval { $marc_record_obj = MARC::Record->new_from_usmarc($marc) }; # handle exceptions
+
+# conversion to MARC::Record object failed, populate $error
+                if ($@) { $error .="\nCreation of MARC::Record object failed: ".$MARC::File::ERROR };
+        }
+        unless ($error) {
+            my @privatefields;
+            foreach my $field ($marc_record_obj->fields()) {
+                if ($field->tag() =~ m/9/ && ($field->tag() != '490' || C4::Context->preference("marcflavour") eq 'UNIMARC')) {
+                    push @privatefields, $field;
+                } elsif (! ($field->is_control_field())) {
+                    $field->delete_subfield(code => '9') if ($field->subfield('9'));
+                }
+            }
+            $marc_record_obj->delete_field($_) for @privatefields;
+            $marc = $marc_record_obj->as_usmarc();
+        }
+    } else {
+        $error = "Feature not yet implemented\n";
+    }
 	return ($error,$marc);
 }
 

catalogue/export.pl

@@ -22,6 +22,7 @@ my ( $template, $loggedinuser, $cookie ) = get_template_and_user({
 
 my $op=$query->param("op");
 my $format=$query->param("format");
+my $error = '';
 if ($op eq "export") {
 	my $biblionumber = $query->param("bib");
 		if ($biblionumber){
@@ -39,7 +40,6 @@ if ($op eq "export") {
 				$marc = marc2modsxml($marc);
 			}
 			elsif ($format =~ /dc/) {
-				my $error;
 				($error,$marc) = marc2dcxml($marc,1);
 				$format = "dublin-core.xml";
 			}
@@ -51,6 +51,10 @@ if ($op eq "export") {
 				C4::Charset::SetUTF8Flag($marc, 1);
 				$marc = $marc->as_usmarc();
 			}
+            elsif ($format =~ /marcstd/) {
+                C4::Charset::SetUTF8Flag($marc,1);
+                ($error, $marc) = marc2marc($marc, 'marcstd', C4::Context->preference('marcflavour'));
+            }
 			print $query->header(
 				-type => 'application/octet-stream',
                 -attachment=>"bib-$biblionumber.$format");

koha-tmpl/intranet-tmpl/prog/en/includes/cat-toolbar.inc

@@ -123,7 +123,8 @@ function confirm_items_deletion() {
 			{ text: _("Dublin Core (XML)"), url: "/cgi-bin/koha/catalogue/export.pl?format=dc&op=export&bib=[% biblionumber %]" },
 			{ text: _("MARCXML"), url: "/cgi-bin/koha/catalogue/export.pl?format=marcxml&op=export&bib=[% biblionumber %]" },
 			{ text: _("MARC (non-Unicode/MARC-8)"), url: "/cgi-bin/koha/catalogue/export.pl?format=marc8&op=export&bib=[% biblionumber %]" },
-			{ text: _("MARC (Unicode/UTF-8)"), url: "/cgi-bin/koha/catalogue/export.pl?format=utf8&op=export&bib=[% biblionumber %]" }
+            { text: _("MARC (Unicode/UTF-8)"), url: "/cgi-bin/koha/catalogue/export.pl?format=utf8&op=export&bib=[% biblionumber %]" },
+            { text: _("MARC (Unicode/UTF-8, Standard)"), url: "/cgi-bin/koha/catalogue/export.pl?format=marcstd&op=export&bib=[% biblionumber %]" }
 		];
 
 	    new YAHOO.widget.Button({

opac/opac-export.pl

@@ -66,6 +66,10 @@ elsif ($format =~ /utf8/) {
     C4::Charset::SetUTF8Flag($marc,1);
     $marc = $marc->as_usmarc();
 }
+elsif ($format =~ /marcstd/) {
+    C4::Charset::SetUTF8Flag($marc,1);
+    ($error,$marc) = marc2marc($marc, 'marcstd', C4::Context->preference('marcflavour'));
+}
 else {
     $error= "Format $format is not supported.";
 }