#-------------------------------------------------------------
#
# parse_format(...)
#


sub parse_format {
	my $type = shift || die "parset_format must be called with type!";
	my $format = shift || die "parse_format must be called with format!";
	my $row = shift || die "parse_format must be called with row!";
	my $i = shift || 0;	# isis repeatable number
	my $codepage = shift || die "parse_format must be called with codepage!";
	if ($type eq "isis") {
		return parse_iso_format($format,$row,$i,$codepage,'isis_sf');
	} elsif ($type eq "excel") {
		return parse_excel_format($format,$row,$i,$codepage);
	} elsif ($type eq "marc") {
		return parse_iso_format($format,$row,$i,$codepage,'marc_sf');
	} elsif ($type eq "feed") {
		return parse_feed_format($format,$row,$i,$codepage);
	}
}

#-------------------------------------------------------------

sub parse_iso_format {

	my $format = shift;
	my $row = shift;
	my $i = shift;
	my $codepage = shift;

	my $func = shift || die "need to know which sub-field function to use";

	require $func.".pm";

	my $out;
	my $out_swish;

	my $prefix = "";
	if ($format =~ s/^([^\d]+)//) {
		$prefix = $1;
	}

	my $display;
	my $swish;

	sub cnv_cp {
		my $codepage = shift;
		my $tmp = shift || return;
		if ($codepage) {
			$tmp = $codepage->convert($tmp) || print STDERR "iso: '$tmp' can't convert\n";
		}
		return $tmp;
	}

	while ($format) {
#print STDERR "\n#### $format";
		# this is EBSCO special to support numeric subfield in
		# form of 856#3
		if ($format =~ s/^(\d\d\d)#*(\w?)//) {
			my $tmp = cnv_cp($codepage,get_sf($row,$1,$2,$i));
			if ($tmp) {
				$display .= $prefix.$tmp;
				$swish .= $tmp." ";
#print STDERR " == $tmp";
			}
			$prefix = "";
		# this might be our local scpeciality -- fields 10 and 11
		# (as opposed to 010 and 011) so they are strictly listed
		# here
		} elsif ($format =~ s/^(1[01])//) {
			my $tmp = cnv_cp($codepage,get_sf($row,$1,undef,$i));
			if ($tmp) {
				$display .= $prefix.$tmp;
				$swish .= $tmp." ";
			}
			$prefix = "";
		} elsif ($format =~ s/^mfn//i) {
			$display .= $prefix . $row->{mfn};
			$prefix = "";
		} elsif ($format =~ s/^([^\d]+)(\d{0,3})/$2/) {
			$prefix .= $1 if ($display);
		} elsif ($format =~ s/^([^\d]+\d{0,2})//) {
			$prefix .= $1 if ($display);
		} elsif ($format =~ s/^(\d{1,2})//) {
			$prefix .= $1 if ($display);
		} else {
			print STDERR "unparsed format: $format\n";
			$prefix .= $format;
			$format = "";
		}
	}
	# add suffix
	$display .= $prefix if ($display);

	return ($swish,$display);
}

#-------------------------------------------------------------

sub parse_excel_format {
	my $format = shift;
	my $row = shift;
	my $i = shift;
	my $codepage = shift;

	my $out;
	my $out_swish;

	my $prefix = "";
	if ($format =~ s/^([^A-Z\|]{1,3})//) {
		$prefix = $1;
	}

	my $display;
	my $swish;

	while ($format && length($format) > 0) {
#print STDERR "\n#### $format #";
		if ($format =~ s/^\|([A-Z]{1,2})\|//) {
#print STDERR "--$1-> $format -[",length($format),"] ";
			if ($row->{$1}) {
				my $tmp = $row->{$1};
				if ($codepage) {
					$tmp = $codepage->convert($tmp) || warn "excel: $1 '$tmp' can't convert";
				}
				$display .= $prefix . $tmp;
				$swish .= $tmp." ";
#print STDERR " == $tmp";
			}
			$prefix = "";
		} elsif ($format =~ s/^([^A-Z\|]+)(\|[A-Z]{1,2}\|)/$2/) {
			$prefix .= $1 if ($display);
		} else {
			print STDERR "unparsed format: $format\n";
			$prefix .= $format;
			$format = "";
		}
#print STDERR " display: $display swish: $swish [format: $format]";
	}
	# add suffix
	$display .= $prefix if ($display);

	return ($swish,$display);
}

#-------------------------------------------------------------

sub parse_feed_format {
	my $format = shift;
	my $data = shift;
	my $i = shift;
	my $codepage = shift;

	my $out;
	my $out_swish;

	my $prefix = "";
	if ($format =~ s/^([^\d\|]{1,3})//) {
		$prefix = $1;
	}

	my $display;
	my $swish;

	while ($format && length($format) > 0) {
#print STDERR "\n#### $format #";
		if ($format =~ s/^\|(\d+)\|//) {
#print STDERR "--$1-> $format -[",length($format),"] ";
			if ($data->{$1}) {
				my $tmp = $data->{$1};
				if ($codepage) {
					$tmp = $codepage->convert($tmp) || warn "feed: $1 '$tmp' can't convert\n";
				}
				$display .= $prefix . $tmp;
				$swish .= $tmp." ";
#print STDERR " == $tmp";
			}
			$prefix = "";
		} elsif ($format =~ s/^([^\d\|]+)(\|\d+\|)/$2/) {
			$prefix .= $1 if ($display);
		} else {
			print STDERR "unparsed format: $format\n";
			$prefix .= $format;
			$format = "";
		}
#print STDERR " display: $display swish: $swish [format: $format]";
	}
	# add suffix
	$display .= $prefix if ($display);

	return ($swish,$display);
}

#-------------------------------------------------------------

1;
