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package WebPAC::Parser; |
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|
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use warnings; |
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use strict; |
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|
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use base qw/WebPAC::Common WebPAC::Normalize/; |
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|
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use PPI; |
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use PPI::Dumper; |
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use Data::Dump qw/dump/; |
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use File::Slurp; |
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|
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|
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=head1 NAME |
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|
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WebPAC::Parser - parse perl normalization configuration files and mungle it |
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|
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=head1 VERSION |
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|
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Version 0.02 |
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|
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=cut |
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|
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our $VERSION = '0.02'; |
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|
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=head1 SYNOPSIS |
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|
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FIXME |
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|
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=head1 FUNCTIONS |
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|
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=head2 new |
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|
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Create new parser object. |
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|
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my $parser = new WebPAC::Parser( |
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config => new WebPAC::Config(), |
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base_path => '/optional/path/to/conf', |
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); |
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|
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=cut |
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|
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sub new { |
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my $class = shift; |
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my $self = {@_}; |
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bless($self, $class); |
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|
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my $log = $self->_get_logger(); |
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|
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$log->logdie("config isn't WebPAC::Config") unless ($self->{config} && $self->{config}->isa('WebPAC::Config')); |
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|
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$log->logdie("can't iterate_inputs over this config object") unless ($self->{config}->can('iterate_inputs')); |
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|
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my $source; |
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|
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$self->{config}->iterate_inputs( sub { |
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my ($input, $database) = @_; |
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my $path = $input->{normalize}->{path} || return; |
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my $full = $self->{base_path} ? $self->{base_path} . '/' . $path : $path; |
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$log->logdie("normalization input $full doesn't exist") unless (-e $full); |
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my $s = read_file( $full ) || $log->logdie("can't read $full: $!"); |
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my $input_name = $input->{name} || $log->logdie("can't deduce name of input: ", dump( $input )); |
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$log->debug("$database/$input_name: adding $path to parser [",length($s)," bytes]"); |
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$source .= $s; |
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$self->{valid_inputs}->{$database}->{$input_name}++; |
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} ); |
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|
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$log->debug("collected ", length($source), " bytes of source"); |
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|
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$self->{source} = $source; |
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|
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$self ? return $self : return undef; |
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} |
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|
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=head2 parse |
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|
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=cut |
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|
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sub parse { |
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my $self = shift; |
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|
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my $log = $self->_get_logger(); |
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|
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$log->logdie('no source found in object') unless ($self->{source}); |
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|
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$log->debug("valid_inputs = ", dump( $self->{valid_inputs} )); |
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|
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my $Document = PPI::Document->new( \$self->{source} ) || $log->logdie("can't parse source:\n", $self->{source}); |
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|
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$Document->prune('PPI::Token::Whitespace'); |
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#$Document->prune('PPI::Token::Operator'); |
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|
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# Find all the named subroutines |
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|
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my $eval_create; |
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my @errors; |
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|
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sub error { |
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my $msg = shift || $log->logconfess("error without message?"); |
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push @errors, $msg; |
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return ''; |
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} |
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|
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$Document->find( sub { |
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my ($Document,$Element) = @_; |
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|
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$Element->isa('PPI::Token::Word') or return ''; |
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$Element->content eq 'lookup' or return ''; |
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|
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$log->debug("expansion: ", $Element->snext_sibling); |
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|
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my $args = $Element->snext_sibling; |
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|
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my @e = $args->child(0)->elements; |
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$log->logdie("hum, expect at least 8 elements, got ", scalar @e, " in $args") if ($#e < 8); |
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|
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if ($log->is_debug) { |
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my $report = "found " . scalar @e . " elements:\n"; |
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|
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foreach my $i ( 0 .. $#e ) { |
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$report .= sprintf("# %-2d: %-30s %s\n", $i, ( $e[$i] || 'undef' ), $e[$i]->class ); |
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} |
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|
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$log->debug($report); |
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} |
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|
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my $key_element = $e[8]->clone; |
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|
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$log->logdie("key element must be PPI::Structure::Block") unless $key_element->isa('PPI::Structure::Block'); |
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|
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$log->debug("key part: ", $key_element); |
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|
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my @key; |
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|
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$key_element->find( sub { |
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my $e = $_[1] || die "no element?"; |
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$e->isa('PPI::Token::Word') or return ''; |
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$e->content eq 'rec' or return ''; |
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|
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my $kf = $e->snext_sibling; |
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|
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$log->debug("key fragment = $kf"); |
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|
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push @key, eval $kf; |
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$log->logdie("can't eval { $kf }: $@") if ($@); |
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|
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return 1; |
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}); |
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|
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my $key = join('-', @key ) || $log->logdie("no key found!"); |
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|
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$log->debug("key = $key"); |
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|
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my $create = ' |
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$coderef = ' . $e[7] . $e[8] . '; |
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foreach my $v ($coderef->()) { |
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next unless (defined($v) && $v ne \'\'); |
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push @{ $lookup->{\'' . $key . '\'}->{$v} }, $mfn; |
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} |
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'; |
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|
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$log->debug("create: $create"); |
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|
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return error("invalid database $e[3]" ) unless $self->valid_database( $e[3] ); |
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return error("invalid input $e[5] of database $e[3]", ) unless $self->valid_database_input( $e[3], $e[5] ); |
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|
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$eval_create->{ $e[3] }->{ $e[5] } .= $create; |
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|
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if ($#e < 10) { |
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$e[8]->insert_after( $e[8]->clone ); |
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$e[8]->insert_after( $e[7]->clone ); |
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$e[8]->insert_after( $e[6]->clone ); |
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} |
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|
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$e[7]->remove; |
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$e[8]->insert_before( new PPI::Token::Quote::Single( "'$key'" ) ); |
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$e[8]->remove; |
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|
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|
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$log->debug(">>> ", $Element->snext_sibling); |
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}); |
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|
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$log->info("create: ", dump($eval_create) ); |
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$log->info("lookup: ", $Document->serialize ); |
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|
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if ($self->{debug}) { |
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my $Dumper = PPI::Dumper->new( $Document ); |
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$Dumper->print; |
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} |
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|
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$log->error("Parser errors: ", join("\n",@errors) ) if (@errors); |
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|
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return 1; |
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} |
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|
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=head2 valid_database |
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|
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my $ok = $parse->valid_database('key'); |
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|
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=cut |
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|
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sub valid_database { |
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my $self = shift; |
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|
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my $database = shift || return; |
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$database =~ s/['"]//g; |
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|
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return defined($self->{valid_inputs}->{$database}); |
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} |
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|
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=head2 valid_database_input |
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|
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my $ok = $parse->valid_database('database_key','input_name'); |
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|
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=cut |
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|
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sub valid_database_input { |
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my $self = shift; |
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|
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my ($database,$input) = @_; |
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$database =~ s/['"]//g; |
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$input =~ s/['"]//g; |
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|
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return defined($self->{valid_inputs}->{$database}->{$input}); |
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} |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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|
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2006 Dobrica Pavlinusic, All Rights Reserved. |
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|
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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|
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1; # End of WebPAC::Parser |
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