functions for merging MARC records of the same type

git-svn-id: svn://svn.open-ils.org/ILS/trunk@15771 dcc99617-32d9-48b4-a31d-7c20da2025e4

diff --git a/Open-ILS/src/sql/Pg/002.schema.config.sql b/Open-ILS/src/sql/Pg/002.schema.config.sql
index ba73b9b..753124e 100644 (file)
--- a/Open-ILS/src/sql/Pg/002.schema.config.sql
+++ b/Open-ILS/src/sql/Pg/002.schema.config.sql
@@ -51,7 +51,7 @@ CREATE TABLE config.upgrade_log (
     install_date    TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW()
 );
 
-INSERT INTO config.upgrade_log (version) VALUES ('0183'); -- Scott McKellar
+INSERT INTO config.upgrade_log (version) VALUES ('0184'); -- miker
 
 CREATE TABLE config.bib_source (
        id              SERIAL  PRIMARY KEY,

diff --git a/Open-ILS/src/sql/Pg/upgrade/0184.schema.vandelay.merge_functions.sql b/Open-ILS/src/sql/Pg/upgrade/0184.schema.vandelay.merge_functions.sql
new file mode 100644 (file)
index 0000000..451e7f6
--- /dev/null
+++ b/Open-ILS/src/sql/Pg/upgrade/0184.schema.vandelay.merge_functions.sql
@@ -0,0 +1,100 @@
+
+BEGIN;
+
+INSERT INTO config.upgrade_log (version) VALUES ('0184'); -- miker
+
+CREATE OR REPLACE FUNCTION vandelay.add_field ( incumbent_xml TEXT, incoming_xml TEXT, field TEXT ) RETURNS TEXT AS $_$
+
+    use MARC::Record;
+    use MARC::File::XML;
+
+    my $incumbent_xml = shift;
+    my $incoming_xml = shift;
+    my $field_spec = shift;
+    $field_spec =~ s/\s+//g;
+
+    my $incumbent_r = MARC::Record->new_from_xml( $incumbent_xml );
+    my $incoming_r = MARC::Record->new_from_xml( $incoming_xml );
+
+    return $incumbent_xml unless ($incumbent_r && $incoming_r);
+
+    my @field_list = split(',', $field_spec);
+
+    my %fields;
+    for my $f (@field_list) {
+        if ($f =~ /^(.{3})(.*)$/) {
+            $fields{$1} = [ split('', $2) ];
+        }
+    }
+
+    for my $f ( keys %fields) {
+        if ( @{$fields{$f}} ) {
+            for my $from_field ($incoming_r->field( $f )) {
+                for my $to_field ($incumbent_r->field( $f )) {
+                    my @new_sf = map { ($_ => $from_field->subfield($_)) } @{$fields{$f}};
+                    $to_field->add_subfields( @new_sf );
+                }
+            }
+        } else {
+            my @new_fields = map { $_->clone } $incoming_r->field( $f );
+            $incumbent_r->insert_fields_ordered( @new_fields );
+        }
+    }
+
+    $incumbent_xml = $incumbent_r->as_xml_record;
+    $incumbent_xml =~ s/^<\?.+?\?>$//mo;
+    $incumbent_xml =~ s/\n//sgo;
+    $incumbent_xml =~ s/>\s+</></sgo;
+
+    return $incumbent_xml;
+
+$_$ LANGUAGE PLPERLU;
+
+CREATE OR REPLACE FUNCTION vandelay.strip_field ( xml TEXT, field TEXT ) RETURNS TEXT AS $_$
+
+    use MARC::Record;
+    use MARC::File::XML;
+
+    my $xml = shift;
+    my $r = MARC::Record->new_from_xml( $xml );
+
+    return $xml unless ($r);
+
+    my $field_spec = shift;
+    $field_spec =~ s/\s+//g;
+
+    my @field_list = split(',', $field_spec);
+
+    my %fields;
+    for my $f (@field_list) {
+        if ($f =~ /^(.{3})(.*)$/) {
+            $fields{$1} = [ split('', $2) ];
+        }
+    }
+
+    for my $f ( keys %fields) {
+        if ( @{$fields{$f}} ) {
+            $_->delete_subfield(code => $fields{$f}) for ($r->field( $f ));
+        } else {
+            $r->delete_field( $_ ) for ( $r->field( $f ) );
+        }
+    }
+
+    $xml = $r->as_xml_record;
+    $xml =~ s/^<\?.+?\?>$//mo;
+    $xml =~ s/\n//sgo;
+    $xml =~ s/>\s+</></sgo;
+
+    return $xml;
+
+$_$ LANGUAGE PLPERLU;
+
+CREATE OR REPLACE FUNCTION vandelay.replace_field ( incumbent_xml TEXT, incoming_xml TEXT, field TEXT ) RETURNS TEXT AS $_$
+    SELECT vandelay.add_field( vandelay.strip_field( $1, $3), $2, $3 );
+$_$ LANGUAGE SQL;
+
+CREATE OR REPLACE FUNCTION vandelay.preserve_field ( incumbent_xml TEXT, incoming_xml TEXT, field TEXT ) RETURNS TEXT AS $_$
+    SELECT vandelay.add_field( vandelay.strip_field( $2, $3), $1, $3 );
+$_$ LANGUAGE SQL;
+
+COMMIT;