File Coverage

blib/lib/WWW/Scraper/ISBN/WordPower_Driver.pm

Criterion	Covered	Total	%
statement	79	79	100.0
branch	15	24	62.5
condition	10	24	41.6
subroutine	8	8	100.0
pod	1	1	100.0
total	113	136	83.0

package WWW::Scraper::ISBN::WordPower_Driver;

use strict;
use warnings;

use vars qw($VERSION @ISA);
$VERSION = '0.08';

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

=head1 NAME

WWW::Scraper::ISBN::WordPower_Driver - Search driver for Word Power online book catalog.

=head1 SYNOPSIS

See parent class documentation (L)

=head1 DESCRIPTION

Searches for book information from Word Power online book catalog

=cut

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

###########################################################################
# Inheritence

use base qw(WWW::Scraper::ISBN::Driver);

###########################################################################
# Modules

use WWW::Mechanize;

###########################################################################
# Constants

use constant	SEARCH	=> 'http://www.word-power.co.uk/searchBook.php?options=isbn&imageField.x=19&imageField.y=9&keywords=';
my ($URL1,$URL2,$URL3) = ('http://www.word-power.co.uk','/books/[^>]+-I','/');

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

###########################################################################
# Public Interface

=head1 METHODS

=over 4

=item C

Creates a query string, then passes the appropriate form fields to the Word
Power server.

The returned page should be the correct catalog page for that ISBN. If not the
function returns zero and allows the next driver in the chain to have a go. If
a valid page is returned, the following fields are returned via the book hash:

  isbn          (now returns isbn13)
  isbn10
  isbn13
  ean13         (industry name)
  author
  title
  book_link
  image_link
  description
  pubdate
  publisher
  binding       (if known)
  pages         (if known)
  weight        (if known) (in grammes)
  width         (if known) (in millimetres)
  height        (if known) (in millimetres)

The book_link and image_link refer back to the Word Power website.

=back

=cut

sub search {
	my $self = shift;
	my $isbn = shift;
	$self->found(0);
	$self->book(undef);

    # validate and convert into EAN13 format
    my $ean = $self->convert_to_ean13($isbn);
    return $self->handler("Invalid ISBN specified [$isbn]")
        if(!$ean || (length $isbn == 13 && $isbn ne $ean)
                 || (length $isbn == 10 && $isbn ne $self->convert_to_isbn10($ean)));

    my $mech = WWW::Mechanize->new();
    $mech->agent_alias( 'Linux Mozilla' );
    $mech->add_header('Accept-Encoding' => undef);

    eval { $mech->get( SEARCH . $isbn ) };
    return $self->handler("WordPower website appears to be unavailable.")
	    if($@ || !$mech->success() || !$mech->content());

    my $content = $mech->content;
    my ($link) = $content =~ m!($URL2$ean$URL3)!si;
#print STDERR "\n# link1=[$URL2$ean$URL3]\n";
#print STDERR "\n# link2=[$URL1$link]\n";
#print STDERR "\n# content1=[\n$content\n]\n";
#print STDERR "\n# is_html=".$mech->is_html().", content type=".$mech->content_type()."\n";
#print STDERR "\n# dump headers=".$mech->dump_headers."\n";

	return $self->handler("Failed to find that book on WordPower website.")
	    unless($link);

    eval { $mech->get( $URL1 . $link ) };
    return $self->handler("WordPower website appears to be unavailable.")
	    if($@ || !$mech->success() || !$mech->content());

	# The Book page
    my $html = $mech->content();

	return $self->handler("Failed to find that book on WordPower website. [$isbn]")
		if($html =~ m!Sorry, we couldn't find any matches for!si);

#print STDERR "\n# content2=[\n$html\n]\n";

    my $data;
    ($data->{isbn10})           = $self->convert_to_isbn10($ean);
    ($data->{publisher})        = $html =~ m!]+>Publisher
    ($data->{pubdate})          = $html =~ m!]+>Publication date

    $data->{publisher} =~ s!<[^>]+>!!g  if($data->{publisher});
    $data->{pubdate} =~ s!\s+! !g       if($data->{pubdate});

    ($data->{isbn13})           = $html =~ m!]+>ISBN13
    ($data->{isbn10})           = $html =~ m!]+>ISBN
    ($data->{image})            = $html =~ m!"(http://.*?/product_images/$data->{isbn13}.jpg)"!i;
    ($data->{thumb})            = $html =~ m!"(http://.*?/product_images/$data->{isbn13}.jpg)"!i;
    ($data->{author})           = $html =~ m!by\s*([^<]+)!i;
    ($data->{title})            = $html =~ m!([^<]+)!i;
    ($data->{description})      = $html =~ m!\s*([^~]+)!si;
    ($data->{binding})          = $html =~ m!]+>Format
    ($data->{pages})            = $html =~ m!
    ($data->{weight})           = $html =~ m!
    ($data->{width})            = $html =~ m!]+>Width \(mm\)
    ($data->{height})           = $html =~ m!]+>Height \(mm\)

    for my $key (qw(weight width height)) {
        next    unless($data->{$key});
        $data->{$key} =~ s/\.0+$//;
    }

    $data->{author} =~ s!<[^>]+>!!g                     if($data->{author});
    if($data->{description}) {
        $data->{description} =~ s!
        $data->{description} =~ s!<(p|br\s*/)>!\n!g;
        $data->{description} =~ s!<[^>]+>!!gs;
        $data->{description} =~ s! +$!!gm;
        $data->{description} =~ s!\n\n!\n!gs;
    }

#use Data::Dumper;
#print STDERR "\n# " . Dumper($data);

	return $self->handler("Could not extract data from WordPower result page.")
		unless(defined $data);

	# trim top and tail
	foreach (keys %$data) {
        next unless(defined $data->{$_});
        $data->{$_} =~ s! ! !g;
        $data->{$_} =~ s/^\s+//;
        $data->{$_} =~ s/\s+$//;
    }

	my $bk = {
		'ean13'		    => $data->{isbn13},
		'isbn13'		=> $data->{isbn13},
		'isbn10'		=> $data->{isbn10},
		'isbn'			=> $data->{isbn13},
		'author'		=> $data->{author},
		'title'			=> $data->{title},
		'book_link'		=> $mech->uri(),
		'image_link'	=> $data->{image},
		'thumb_link'	=> $data->{thumb},
		'description'	=> $data->{description},
		'pubdate'		=> $data->{pubdate},
		'publisher'		=> $data->{publisher},
		'binding'	    => $data->{binding},
		'pages'		    => $data->{pages},
		'weight'		=> $data->{weight},
		'width'		    => $data->{width},
		'height'		=> $data->{height},
        'html'          => $html
	};

#use Data::Dumper;
#print STDERR "\n# book=".Dumper($bk);

    $self->book($bk);
	$self->found(1);
	return $self->book;
}

1;

__END__