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package WebPac; |
package WebPAC; |
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use Carp; |
use Carp; |
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use Text::Iconv; |
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use Config::IniFiles; |
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use Data::Dumper; |
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=head1 NAME |
=head1 NAME |
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WebPac - base class for WebPac |
WebPAC - base class for WebPAC |
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=head1 DESCRIPTION |
=head1 DESCRIPTION |
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This class does basic thing for WebPac. |
This module implements methods used by WebPAC. |
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=head1 METHODS |
=head1 METHODS |
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=head2 new |
=head2 new |
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This will create new instance of WebPac using configuration specified by C<config_file>. |
This will create new instance of WebPAC using configuration specified by C<config_file>. |
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my $webpac = new WebPac( |
my $webpac = new WebPAC( |
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config_file => 'name.conf', |
config_file => 'name.conf', |
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[code_page => 'ISO-8859-2',] |
[code_page => 'ISO-8859-2',] |
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); |
); |
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Default C<code_page> is C<ISO-8859-2>. |
Default C<code_page> is C<ISO-8859-2>. |
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It will also read configuration files |
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C<global.conf> (used by indexer and Web font-end) |
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and configuration file specified by C<config_file> |
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which describes databases to be indexed. |
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=cut |
=cut |
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sub new { |
sub new { |
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# output codepage |
# output codepage |
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$self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'}); |
$self->{'code_page'} = 'ISO-8859-2' if (! $self->{'code_page'}); |
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return $self; |
# |
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} |
# read global.conf |
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# |
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=head2 read_global_config |
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Read global configuration (used by indexer and Web font-end) |
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=cut |
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sub read_global_config { |
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my $self = shift; |
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$self->{global_config_file} = new Config::IniFiles( -file => 'global.conf' ) || croak "can't open 'global.conf'"; |
$self->{global_config_file} = new Config::IniFiles( -file => 'global.conf' ) || croak "can't open 'global.conf'"; |
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$self->{global_config}->{$var} = $self->{global_config_file}->val('global', $var); |
$self->{global_config}->{$var} = $self->{global_config_file}->val('global', $var); |
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} |
} |
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return $self; |
# |
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} |
# read indexer config file |
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# |
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=head2 read_indexer_config |
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Read indexer configuration (specify databases, types etc.) |
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=cut |
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sub read_indexer_config { |
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my $self = shift; |
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$self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || croak "can't open '$self->{config_file}'"; |
$self->{indexer_config_file} = new Config::IniFiles( -file => $self->{config_file} ) || croak "can't open '$self->{config_file}'"; |
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By default, ISIS code page is assumed to be C<852>. |
By default, ISIS code page is assumed to be C<852>. |
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If C<limit_mfn> is set, it will read just 500 records from |
If optional parametar C<limit_mfn> is set, it will read just 500 records |
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database in example above. |
from database in example above. |
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Returns number of last record read into memory (size of database, really). |
Returns number of last record read into memory (size of database, really). |
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croak "need filename" if (! $arg->{'filename'}); |
croak "need filename" if (! $arg->{'filename'}); |
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my $code_page = $arg->{'code_page'} || '852'; |
my $code_page = $arg->{'code_page'} || '852'; |
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use OpenIsis; |
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#$self->{'isis_code_page'} = $code_page; |
#$self->{'isis_code_page'} = $code_page; |
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# create Text::Iconv object |
# create Text::Iconv object |
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my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1; |
my $maxmfn = OpenIsis::maxRowid( $isis_db ) || 1; |
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$maxmfn = $self->{limit_mfn} if ($self->{limit_mfn}); |
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# read database |
# read database |
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for (my $mfn = 1; $mfn <= $maxmfn; $mfn++) { |
for (my $mfn = 1; $mfn <= $maxmfn; $mfn++) { |
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} |
} |
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# create lookup |
# create lookup |
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my $rec = $self->{'data'}->{$mfn}; |
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$self->create_lookup($rec, @{$arg->{'lookup'}}); |
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foreach my $i (@{$arg->{lookup}}) { |
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my $rec = $self->{'data'}->{$mfn}; |
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if ($i->{'eval'}) { |
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my $eval = $self->fill_in($rec,$i->{'eval'}); |
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my $key = $self->fill_in($rec,$i->{'key'}); |
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my @val = $self->fill_in($rec,$i->{'val'}); |
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if ($key && @val && eval $eval) { |
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push @{$self->{'lookup'}->{$key}}, @val; |
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} |
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} else { |
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my $key = $self->fill_in($rec,$i->{'key'}); |
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my @val = $self->fill_in($rec,$i->{'val'}); |
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if ($key && @val) { |
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push @{$self->{'lookup'}->{$key}}, @val; |
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} |
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} |
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} |
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} |
} |
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$self->{'current_mfn'} = 1; |
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# store max mfn and return it. |
# store max mfn and return it. |
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return $self->{'max_mfn'} = $maxmfn; |
return $self->{'max_mfn'} = $maxmfn; |
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} |
} |
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=head2 fetch_rec |
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Fetch next record from database. It will also display progress bar (once |
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it's implemented, that is). |
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my $rec = $webpac->fetch_rec; |
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=cut |
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sub fetch_rec { |
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my $self = shift; |
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my $mfn = $self->{'current_mfn'}++ || confess "it seems that you didn't load database!"; |
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if ($mfn > $self->{'max_mfn'}) { |
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$self->{'current_mfn'} = $self->{'max_mfn'}; |
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return; |
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} |
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return $self->{'data'}->{$mfn}; |
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} |
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=head2 create_lookup |
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Create lookup from record using lookup definition. |
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=cut |
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sub create_lookup { |
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my $self = shift; |
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my $rec = shift || confess "need record to create lookup"; |
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confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
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foreach my $i (@_) { |
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if ($i->{'eval'}) { |
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my $eval = $self->fill_in($rec,$i->{'eval'}); |
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my $key = $self->fill_in($rec,$i->{'key'}); |
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my @val = $self->fill_in($rec,$i->{'val'}); |
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if ($key && @val && eval $eval) { |
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push @{$self->{'lookup'}->{$key}}, @val; |
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} |
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} else { |
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my $key = $self->fill_in($rec,$i->{'key'}); |
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my @val = $self->fill_in($rec,$i->{'val'}); |
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if ($key && @val) { |
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push @{$self->{'lookup'}->{$key}}, @val; |
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} |
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} |
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} |
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} |
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=head2 get_data |
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Returns value from record. |
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$self->get_data(\$rec,$f,$sf,$i,\$found); |
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Arguments are: |
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record reference C<$rec>, |
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field C<$f>, |
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optional subfiled C<$sf>, |
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index for repeatable values C<$i>. |
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Optinal variable C<$found> will be incremeted if thre |
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is field. |
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Returns value or empty string. |
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=cut |
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sub get_data { |
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my $self = shift; |
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my ($rec,$f,$sf,$i,$found) = @_; |
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if ($$rec->{$f}) { |
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if ($sf && $$rec->{$f}->[$i]->{$sf}) { |
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$$found++ if (defined($$found)); |
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return $$rec->{$f}->[$i]->{$sf}; |
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} elsif ($$rec->{$f}->[$i]) { |
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$$found++ if (defined($$found)); |
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return $$rec->{$f}->[$i]; |
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} |
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} else { |
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return ''; |
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} |
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} |
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=head2 fill_in |
=head2 fill_in |
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Workhourse of all: takes record from in-memory structure of database and |
Workhourse of all: takes record from in-memory structure of database and |
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$webpac->fill_in($rec,'v250^a'); |
$webpac->fill_in($rec,'v250^a'); |
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Optional argument is ordinal number for repeatable fields. By default, |
Optional argument is ordinal number for repeatable fields. By default, |
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it's assume to be first repeatable field. |
it's assume to be first repeatable field (fields are perl array, so first |
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element is 0). |
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Following example will read second value from repeatable field. |
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$webpac->fill_in($rec,'Title: v250^a',1); |
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This function B<does not> perform parsing of format to inteligenty skip |
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delimiters before fields which aren't used. |
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=cut |
=cut |
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my $i = shift || 0; |
my $i = shift || 0; |
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# FIXME remove for speedup? |
# FIXME remove for speedup? |
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if ($rec !~ /HASH/) { |
confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
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confess("need HASH as first argument!"); |
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} |
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my $found = 0; |
my $found = 0; |
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# get field with subfield |
my $eval_code; |
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sub get_sf { |
# remove eval{...} from beginning |
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my ($found,$rec,$f,$sf,$i) = @_; |
$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
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if ($$rec->{$f} && $$rec->{$f}->[$i]->{$sf}) { |
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$$found++; |
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return $$rec->{$f}->[$i]->{$sf}; |
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} else { |
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return ''; |
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} |
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} |
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# get field (without subfield) |
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sub get_nosf { |
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my ($found,$rec,$f,$i) = @_; |
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if ($$rec->{$f} && $$rec->{$f}->[$i]) { |
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$$found++; |
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return $$rec->{$f}->[$i]; |
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} else { |
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return ''; |
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} |
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} |
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# do actual replacement of placeholders |
# do actual replacement of placeholders |
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$format =~ s/v(\d+)\^(\w)/get_sf(\$found,\$rec,$1,$2,$i)/ges; |
$format =~ s/v(\d+)(?:\^(\w))*/$self->get_data(\$rec,$1,$2,$i,\$found)/ges; |
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$format =~ s/v(\d+)/get_nosf(\$found,\$rec,$1,$i)/ges; |
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if ($found) { |
if ($found) { |
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return $format; |
if ($eval_code) { |
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my $eval = $self->fill_in($rec,$eval_code,$i); |
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return if (! eval $eval); |
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} |
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# do we have lookups? |
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if ($format =~ /\[[^\[\]]+\]/o) { |
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return $self->lookup($format); |
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} else { |
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return $format; |
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} |
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} else { |
} else { |
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return; |
return; |
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} |
} |
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=head2 lookup |
=head2 lookup |
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This function will perform lookups on format supplied to it. |
Perform lookups on format supplied to it. |
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my $txt = $self->lookup('[v900]'); |
my $txt = $self->lookup('[v900]'); |
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Lookups can be nested (like C<[d:[a:[v900]]]>). |
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=cut |
=cut |
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sub lookup { |
sub lookup { |
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my $tmp = shift || confess "need format"; |
my $tmp = shift || confess "need format"; |
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if ($tmp =~ /\[[^\[\]]+\]/) { |
if ($tmp =~ /\[[^\[\]]+\]/o) { |
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my @in = ( $tmp ); |
my @in = ( $tmp ); |
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print "##lookup $tmp\n"; |
#print "##lookup $tmp\n"; |
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my @out; |
my @out; |
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while (my $f = shift @in) { |
while (my $f = shift @in) { |
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if ($f =~ /\[([^\[\]]+)\]/) { |
if ($f =~ /\[([^\[\]]+)\]/) { |
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my $k = $1; |
my $k = $1; |
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if ($self->{'lookup'}->{$k}) { |
if ($self->{'lookup'}->{$k}) { |
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print "## lookup key = $k\n"; |
#print "## lookup key = $k\n"; |
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foreach my $nv (@{$self->{'lookup'}->{$k}}) { |
foreach my $nv (@{$self->{'lookup'}->{$k}}) { |
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my $tmp2 = $f; |
my $tmp2 = $f; |
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$tmp2 =~ s/\[$k\]/$nv/g; |
$tmp2 =~ s/\[$k\]/$nv/g; |
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push @in, $tmp2; |
push @in, $tmp2; |
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print "## lookup in => $tmp2\n"; |
#print "## lookup in => $tmp2\n"; |
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} |
} |
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} else { |
} else { |
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undef $f; |
undef $f; |
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} |
} |
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} elsif ($f) { |
} elsif ($f) { |
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push @out, $f; |
push @out, $f; |
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print "## lookup out => $f\n"; |
#print "## lookup out => $f\n"; |
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} |
} |
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} |
} |
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return @out; |
return @out; |
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} |
} |
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} |
} |
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=head2 parse |
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Perform smart parsing of string, skipping delimiters for fields which aren't |
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defined. It can also eval code in format starting with C<eval{...}> and |
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return output or nothing depending on eval code. |
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$webpac->parse($rec,'eval{"v901^a" eq "Deskriptor"}descriptor: v250^a', $i); |
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=cut |
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sub parse { |
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my $self = shift; |
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my ($rec, $format, $i) = @_; |
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confess("need HASH as first argument!") if ($rec !~ /HASH/o); |
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$i = 0 if (! $i); |
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my @out; |
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my $eval_code; |
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# remove eval{...} from beginning |
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$eval_code = $1 if ($format =~ s/^eval{([^}]+)}//s); |
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my $prefix; |
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my $all_found=0; |
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#print "## $format\n"; |
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while ($format =~ s/^(.*?)v(\d+)(?:\^(\w))*//s) { |
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#print "## [ $1 | $2 | $3 ] $format\n"; |
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my $del = $1 || ''; |
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$prefix ||= $del if ($all_found == 0); |
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my $found = 0; |
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my $tmp = $self->get_data(\$rec,$2,$3,$i,\$found); |
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if ($found) { |
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push @out, $del; |
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push @out, $tmp; |
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$all_found += $found; |
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} |
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} |
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return if (! $all_found); |
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my $out = join('',@out) . $format; |
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# add prefix if not there |
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$out = $prefix . $out if ($out !~ m/^\Q$prefix\E/); |
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if ($eval_code) { |
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my $eval = $self->fill_in($rec,$eval_code,$i); |
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return if (! eval $eval); |
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} |
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return $out; |
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} |
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1; |
1; |