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=head1 VERSION |
=head1 VERSION |
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Version 0.02 |
Version 0.08 |
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=cut |
=cut |
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our $VERSION = '0.02'; |
our $VERSION = '0.08'; |
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=head1 SYNOPSIS |
=head1 SYNOPSIS |
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code defined as code ref on format after field substitution to producing |
code defined as code ref on format after field substitution to producing |
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output |
output |
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There is one built-in filter called C<regex> which can be use like this: |
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filter{regex(s/foo/bar/)} |
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=item * |
=item * |
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optional C<lookup{...}> will be then performed. See C<WebPAC::Lookups>. |
optional C<lookup{...}> will be then performed. See C<WebPAC::Lookups>. |
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db => $db_obj, |
db => $db_obj, |
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lookup_regex => $lookup->regex, |
lookup_regex => $lookup->regex, |
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lookup => $lookup_obj, |
lookup => $lookup_obj, |
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prefix => 'foobar', |
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); |
); |
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Parametar C<filter> defines user supplied snippets of perl code which can |
Parametar C<filter> defines user supplied snippets of perl code which can |
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be use with C<filter{...}> notation. |
be use with C<filter{...}> notation. |
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C<prefix> is used to form filename for database record (to support multiple |
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source files which are joined in one database). |
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Recommended parametar C<lookup_regex> is used to enable parsing of lookups |
Recommended parametar C<lookup_regex> is used to enable parsing of lookups |
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in structures. If you pass this parametar, you must also pass C<lookup> |
in structures. If you pass this parametar, you must also pass C<lookup> |
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which is C<WebPAC::Lookup> object. |
which is C<WebPAC::Lookup> object. |
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$log->logdie("lookup must be WebPAC::Lookup object") if ($self->{'lookup'} && ! $self->{'lookup'}->isa('WebPAC::Lookup')); |
$log->logdie("lookup must be WebPAC::Lookup object") if ($self->{'lookup'} && ! $self->{'lookup'}->isa('WebPAC::Lookup')); |
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$log->warn("no prefix defined. please check that!") unless ($self->{'prefix'}); |
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$log->debug("using lookup regex: ", $self->{lookup_regex}) if ($r && $l); |
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if (! $self->{filter} || ! $self->{filter}->{regex}) { |
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$log->debug("adding built-in filter regex"); |
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$self->{filter}->{regex} = sub { |
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my ($val, $regex) = @_; |
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eval "\$val =~ $regex"; |
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return $val; |
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}; |
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} |
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$self ? return $self : return undef; |
$self ? return $self : return undef; |
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} |
} |
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$log->debug("data_structure rec = ", sub { Dumper($rec) }); |
$log->debug("data_structure rec = ", sub { Dumper($rec) }); |
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$log->logdie("need unique ID (mfn) in field 000 of record ", sub { Dumper($rec) } ) unless (defined($rec->{'000'})); |
$log->logdie("need unique ID (mfn) in field 000 of record " . Dumper($rec) ) unless (defined($rec->{'000'})); |
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my $mfn = $rec->{'000'}->[0] || $log->logdie("field 000 isn't array!"); |
my $id = $rec->{'000'}->[0] || $log->logdie("field 000 isn't array!"); |
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my $cache_file; |
my $cache_file; |
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if ($self->{'db'}) { |
if ($self->{'db'}) { |
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my $ds = $self->{'db'}->load_ds( $mfn ); |
my $ds = $self->{'db'}->load_ds( id => $id, prefix => $self->{prefix} ); |
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$log->debug("load_ds( rec = ", sub { Dumper($rec) }, ") = ", sub { Dumper($ds) }); |
$log->debug("load_ds( rec = ", sub { Dumper($rec) }, ") = ", sub { Dumper($ds) }); |
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return $ds if ($ds); |
return $ds if ($ds); |
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$log->debug("cache miss, creating"); |
$log->debug("cache miss, creating"); |
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} |
} |
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undef $self->{'currnet_filename'}; |
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undef $self->{'headline'}; |
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my @sorted_tags; |
my @sorted_tags; |
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if ($self->{tags_by_order}) { |
if ($self->{tags_by_order}) { |
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@sorted_tags = @{$self->{tags_by_order}}; |
@sorted_tags = @{$self->{tags_by_order}}; |
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foreach my $type (@types) { |
foreach my $type (@types) { |
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# append to previous line? |
# append to previous line? |
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$log->debug("type: $type ",sub { join(" ",@v) }, $row->{'append'} || 'no append'); |
$log->debug("type: $type ",sub { join(" ",@v) }, " ", $row->{'append'} || 'no append'); |
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if ($tag->{'append'}) { |
if ($tag->{'append'}) { |
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# I will delimit appended part with |
# I will delimit appended part with |
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} |
} |
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$self->{'db'}->save_ds( |
$self->{'db'}->save_ds( |
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id => $mfn, |
id => $id, |
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ds => $ds, |
ds => $ds, |
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prefix => $self->{prefix}, |
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) if ($self->{'db'}); |
) if ($self->{'db'}); |
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$log->debug("ds: ", sub { Dumper($ds) }); |
$log->debug("ds: ", sub { Dumper($ds) }); |
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my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
my $text = $webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
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Filters are implemented here. While simple form of filters looks like this: |
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filter{name_of_filter} |
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but, filters can also have variable number of parametars like this: |
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filter{name_of_filter(param,param,param)} |
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=cut |
=cut |
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my $warn_once; |
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sub parse { |
sub parse { |
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my $self = shift; |
my $self = shift; |
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my @out; |
my @out; |
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$log->debug("format: $format"); |
$log->debug("format: $format [$i]"); |
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my $eval_code; |
my $eval_code; |
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# remove eval{...} from beginning |
# remove eval{...} from beginning |
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# remove filter{...} from beginning |
# remove filter{...} from beginning |
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$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s); |
$filter_name = $1 if ($format =~ s/^filter{([^}]+)}//s); |
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# did we found any (att all) field from format in row? |
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my $found_any; |
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# prefix before first field which we preserve it $found_any |
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my $prefix; |
my $prefix; |
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my $all_found=0; |
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my $f_step = 1; |
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while ($format =~ s/^(.*?)(v|s)(\d+)(?:\^(\w))?//s) { |
while ($format =~ s/^(.*?)(v|s)(\d+)(?:\^(\w))?//s) { |
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my $del = $1 || ''; |
my $del = $1 || ''; |
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$prefix ||= $del if ($all_found == 0); |
$prefix = $del if ($f_step == 1); |
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my $fld_type = lc($2); |
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# repeatable index |
# repeatable index |
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my $r = $i; |
my $r = $i; |
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$r = 0 if (lc("$2") eq 's'); |
if ($fld_type eq 's') { |
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if ($found_any->{'v'}) { |
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$r = 0; |
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} else { |
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return; |
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} |
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} |
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my $found = 0; |
my $found = 0; |
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my $tmp = $self->get_data(\$rec,$3,$4,$r,\$found); |
my $tmp = $self->get_data(\$rec,$3,$4,$r,\$found); |
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if ($found) { |
if ($found) { |
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push @out, $del; |
$found_any->{$fld_type} += $found; |
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# we will skip delimiter before first occurence of field! |
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push @out, $del unless($found_any->{$fld_type} == 1); |
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push @out, $tmp; |
push @out, $tmp; |
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$all_found += $found; |
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} |
} |
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$f_step++; |
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} |
} |
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return if (! $all_found); |
# test if any fields found? |
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return if (! $found_any->{'v'} && ! $found_any->{'s'}); |
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my $out = join('',@out); |
my $out = join('',@out); |
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return if (! $self->_eval($eval)); |
return if (! $self->_eval($eval)); |
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} |
} |
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if ($filter_name && $self->{'filter'}->{$filter_name}) { |
if ($filter_name) { |
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$log->debug("about to filter{$filter_name} format: $out"); |
my @filter_args; |
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$out = $self->{'filter'}->{$filter_name}->($out); |
if ($filter_name =~ s/(\w+)\((.*)\)/$1/) { |
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return unless(defined($out)); |
@filter_args = split(/,/, $2); |
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$log->debug("filter result: $out"); |
} |
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if ($self->{'filter'}->{$filter_name}) { |
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$log->debug("about to filter{$filter_name} format: $out with arguments: ", join(",", @filter_args)); |
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unshift @filter_args, $out; |
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$out = $self->{'filter'}->{$filter_name}->(@filter_args); |
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return unless(defined($out)); |
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$log->debug("filter result: $out"); |
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} elsif (! $warn_once->{$filter_name}) { |
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$log->warn("trying to use undefined filter $filter_name"); |
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$warn_once->{$filter_name}++; |
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} |
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} |
} |
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return $out; |
return $out; |
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} |
} |
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my $found = 0; |
my $found = 0; |
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my $just_single = 1; |
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my $eval_code; |
my $eval_code; |
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# remove eval{...} from beginning |
# remove eval{...} from beginning |
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# do actual replacement of placeholders |
# do actual replacement of placeholders |
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# repeatable fields |
# repeatable fields |
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$format =~ s/v(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,$i,\$found)/ges; |
if ($format =~ s/v(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,$i,\$found)/ges) { |
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$just_single = 0; |
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} |
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# non-repeatable fields |
# non-repeatable fields |
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$format =~ s/s(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,0,\$found)/ges; |
if ($format =~ s/s(\d+)(?:\^(\w))?/$self->get_data(\$rec,$1,$2,0,\$found)/ges) { |
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return if ($i > 0 && $just_single); |
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} |
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if ($found) { |
if ($found) { |
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$log->debug("format: $format"); |
$log->debug("format: $format"); |
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# do we have lookups? |
# do we have lookups? |
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if ($self->{'lookup'}) { |
if ($self->{'lookup'}) { |
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if ($self->{'lookup'}->can('lookup')) { |
if ($self->{'lookup'}->can('lookup')) { |
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return $self->{'lookup'}->lookup($format); |
my @lookup = $self->{lookup}->lookup($format); |
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$log->debug("lookup $format", join(", ", @lookup)); |
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return @lookup; |
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} else { |
} else { |
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$log->warn("Have lookup object but can't invoke lookup method"); |
$log->warn("Have lookup object but can't invoke lookup method"); |
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} |
} |