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.\" ========================================================================
.\"
.IX Title "Catmandu::Fix::marc_copy 3pm"
.TH Catmandu::Fix::marc_copy 3pm "2019-02-25" "perl v5.28.1" "User Contributed Perl Documentation"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
Catmandu::Fix::marc_copy \- copy marc data in a structured way to a new field
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
.Vb 2
\&    # Cut the 001 field out of the MARC record into the fixed001
\&    marc_copy(001, fixed001)
\&
\&    # Cut all 650 fields out of the MARC record into the subjects array
\&    marc_copy(650, subjects)
.Ve
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
Copy \s-1MARC\s0 data referred by \s-1MARC_TAG\s0 in a structured way to \s-1JSON\s0 path.
.PP
In contrast to Catmandu::Fix::marc_map and Catmandu::Fix::marc_spec
marc_copy will not only copy data content (values) but also all data elements
like tag, indicators and subfield codes into a nested data structure.
.SH "METHODS"
.IX Header "METHODS"
.SS "marc_copy(\s-1MARC_PATH, JSON_PATH,\s0 [equals: \s-1REGEX\s0])"
.IX Subsection "marc_copy(MARC_PATH, JSON_PATH, [equals: REGEX])"
Copy this \s-1MARC\s0 fields referred by a \s-1MARC_PATH\s0 to a \s-1JSON_PATH.\s0 When an
\&\f(CW\*(C`equals\*(C'\fR value has been provided, then only the MARC_PATHs with a value
equal to \f(CW\*(C`equals\*(C'\fR will be copied to \s-1JSON_PATH.\s0 When the \s-1MARC_PATH\s0 points
to a subfield, then the subfield value need to match \f(CW\*(C`equals\*(C'\fR. When the
\&\s-1MARC_PATH\s0 points multiple subfields, then a concatinated string value needs
to match \f(CW\*(C`equals\*(C'\fR:
.PP
.Vb 2
\&    Data:
\&    100 $aMy$bField.
\&
\&    # copy only the 100 fields which have a $a subfield
\&    marc_copy(100a,tmp)
\&
\&    # copy only the 100 fields with have a $a subfield matching \*(AqMy\*(Aq
\&    marc_copy(100a,tmp,equals:"My")
\&
\&    # copy only the 100 fields with have a concatinated string value \*(AqMyField.\*(Aq
\&    # (equals is an regex, the period "." needs to be escaped "\e.")
\&    marc_copy(100,tmp,equals:"MyField\e.")
\&
\&    # copy only the 100 fields which have a "." at the end
\&    marc_copy(100,tmp,equals:"\e.$")
.Ve
.PP
More examples:
.PP
.Vb 2
\&    # Copy all the 300 fields
\&    marc_copy(300,tmp)
\&
\&    # Copy all the 300 fields with indicator 1 = 1
\&    marc_copy(300[1],tmp)
\&
\&    # Copy all the 300 fields which have subfield c
\&    marc_copy(300c,tmp)
\&
\&    # Copy all the 300 fields which have subfield c equal to \*(AqABC\*(Aq
\&    marc_copy(300c,tmp,equals:"^ABC")
\&
\&    The JSON_PATH C<tmp> will contain an array with one item per field that was copied.
\&    Each item is a hash containing the following fields:
\&
\&      tmp.*.tag        \- The names of the MARC field
\&      tmp.*.ind1       \- The value of the first indicator
\&      tmp.*.ind2       \- The value of the second indicator
\&      tmp.*.subfields  \- An array of subfield items. Each subfield item is a
\&                         hash of the subfield code and subfield value
\&
\&    E.g.
\&
\&        tmp:
\&        \- tag: \*(Aq300\*(Aq
\&          ind1: \*(Aq \*(Aq
\&          ind2: \*(Aq \*(Aq
\&          subfields:
\&          \- a: \*(Aqblabla:\*(Aq
\&          \- v: \*(Aqtest123\*(Aq
\&          \- c: \*(Aqok123\*(Aq
\&
\&    These JSON paths can be used like:
\&
\&        # Set the first indicator of all 300 fields
\&        do marc_each(var:this)
\&          if all_match(this.tag,300)
\&
\&            # Set the first indicator to 1
\&            set_field(this.ind1,1)
\&
\&            marc_paste(this)
\&          end
\&        end
\&
\&        # Capitalize all the v subfields of 300
\&        do marc_each(var:this)
\&            if all_match(this.tag,300)
\&
\&             do list(path:this.subfields, var:loop)
\&                if (exists(loop.v))
\&                    upcase(loop.v)
\&                end
\&             end
\&
\&             marc_paste(this)
\&          end
\&        end
.Ve
.SH "INLINE"
.IX Header "INLINE"
This Fix can be used inline in a Perl script:
.PP
.Vb 1
\&    use Catmandu::Fix::marc_copy as => \*(Aqmarc_copy\*(Aq;
\&
\&    my $data = { record => [\*(Aq650\*(Aq, \*(Aq \*(Aq, 0, \*(Aqa\*(Aq, \*(AqPerl\*(Aq] };
\&
\&    $data = marc_copy($data,\*(Aq650\*(Aq,\*(Aqsubject\*(Aq);
\&
\&    print $data\->{subject}\->[0]\->{tag} , "\en"; # \*(Aq650\*(Aq
\&    print $data\->{subject}\->[0]\->{ind1} , "\en"; # \*(Aq \*(Aq
\&    print $data\->{subject}\->[0]\->{ind2} , "\en"; # 0
\&    print $data\->{subject}\->[0]\->{subfields}\->[0]\->{a} , "\en"; # \*(AqPerl\*(Aq
.Ve
.SH "SEE ALSO"
.IX Header "SEE ALSO"
.IP "\(bu" 4
Catmandu::Fix::marc_cut
.IP "\(bu" 4
Catmandu::Fix::marc_paste
.SH "LICENSE AND COPYRIGHT"
.IX Header "LICENSE AND COPYRIGHT"
This program is free software; you can redistribute it and/or modify it
under the terms of either: the \s-1GNU\s0 General Public License as published
by the Free Software Foundation; or the Artistic License.
.PP
See http://dev.perl.org/licenses/ for more information.