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package XML::Grammar::ProductsSyndication; |
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use warnings; |
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use strict; |
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use 5.008; |
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use File::Spec; |
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use XML::Grammar::ProductsSyndication::ConfigData; |
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5819
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use XML::LibXML; |
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use XML::LibXSLT; |
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use XML::Amazon; |
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use LWP::UserAgent; |
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use Imager; |
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use base 'Class::Accessor'; |
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__PACKAGE__->mk_accessors(qw( |
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_data_dir |
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_filename |
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_img_fn |
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_source_dom |
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_stylesheet |
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_xml_parser |
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)); |
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=head1 NAME |
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XML::Grammar::ProductsSyndication - an XML Grammar for ProductsSyndication. |
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=head1 VERSION |
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Version 0.0403 |
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=cut |
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39
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our $VERSION = '0.0403'; |
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41
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=head1 SYNOPSIS |
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use XML::Grammar::ProductsSyndication; |
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45
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my $synd = |
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XML::Grammar::ProductsSyndication->new( |
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{ |
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'source' => |
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{ |
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'file' => "products.xml", |
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}, |
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} |
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); |
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55
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# A LibXML compatible XHTML DOM |
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my $xhtml = $synd->transform_into_html({ 'output' => "xml" }); |
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# Not implemented yet! |
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$synd->download_preview_images( |
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{ |
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'dir' => "mydir/", |
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} |
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); |
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65
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=head1 FUNCTIONS |
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67
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=head2 XML::Grammar::ProductsSyndication->new({ arg1 => "value"...}) |
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69
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The constructor - accepts a single hash reference with the following keys: |
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71
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=over 4 |
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73
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=item 'source' |
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75
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A reference to a hash that contains the information for the source XML for the |
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file. Currently supported is a C<'file'> key that contains a path to the file. |
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78
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=item 'data_dir' |
79
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80
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Points to the data directory where the DTD files, the XSLT stylesheet, etc. |
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are stored. Should not be generally over-ridden. |
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83
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=back |
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85
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=cut |
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87
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sub new |
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{ |
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my $class = shift; |
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my $self = {}; |
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bless $self, $class; |
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$self->_init(@_); |
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return $self; |
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} |
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96
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sub _init |
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{ |
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my ($self, $args) = @_; |
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100
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my $source = $args->{'source'} or |
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die "did not specify the source"; |
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103
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my $file = $source->{file}; |
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105
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$self->_filename($file); |
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107
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my $data_dir = $args->{'data_dir'} || |
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XML::Grammar::ProductsSyndication::ConfigData->config('extradata_install_path')->[0]; |
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110
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$self->_data_dir($data_dir); |
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return 0; |
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} |
113
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114
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sub _get_xml_parser |
115
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{ |
116
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my $self = shift; |
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118
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if (!defined($self->_xml_parser())) |
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{ |
120
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$self->_xml_parser(XML::LibXML->new()); |
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$self->_xml_parser()->validation(0); |
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} |
123
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return $self->_xml_parser(); |
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} |
125
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126
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sub _get_source_dom |
127
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{ |
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my $self = shift; |
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130
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if (!defined($self->_source_dom())) |
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{ |
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$self->_source_dom($self->_get_xml_parser()->parse_file($self->_filename())); |
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} |
134
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return $self->_source_dom(); |
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} |
136
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137
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=head2 $processor->is_valid() |
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139
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Checks if the filename validates according to the DTD. |
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141
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=cut |
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143
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sub is_valid |
144
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{ |
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my $self = shift; |
146
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147
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my $dtd = |
148
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XML::LibXML::Dtd->new( |
149
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"Products Syndication Markup Language 0.1.1", |
150
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File::Spec->catfile( |
151
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$self->_data_dir(), |
152
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"product-syndication.dtd" |
153
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), |
154
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); |
155
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156
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return $self->_get_source_dom()->validate($dtd); |
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} |
158
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159
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sub _get_stylesheet |
160
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{ |
161
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my $self = shift; |
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163
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if (!defined($self->_stylesheet())) |
164
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{ |
165
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my $xslt = XML::LibXSLT->new(); |
166
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167
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my $style_doc = $self->_get_xml_parser()->parse_file( |
168
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File::Spec->catfile( |
169
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$self->_data_dir(), |
170
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"product-syndication.xslt" |
171
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), |
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); |
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174
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$self->_stylesheet($xslt->parse_stylesheet($style_doc)); |
175
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} |
176
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return $self->_stylesheet(); |
177
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} |
178
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179
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=head2 $processor->transform_into_html({ 'output' => $output, }) |
180
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181
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Transforms the output into HTML, and returns the results. If C<'output'> is |
182
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C<'xml'> returns the L XML DOM. If C<'output'> is C<'string'> |
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returns the XML as a monolithic string. Other C<'output'> formats are |
184
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undefined. |
185
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186
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=cut |
187
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188
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sub transform_into_html |
189
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{ |
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my ($self, $args) = @_; |
191
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192
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my $source_dom = $self->_get_source_dom(); |
193
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my $stylesheet = $self->_get_stylesheet(); |
194
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195
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my $results = $stylesheet->transform($source_dom); |
196
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197
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my $medium = $args->{output}; |
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199
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if ($medium eq "string") |
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{ |
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return $stylesheet->output_string($results); |
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} |
203
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elsif ($medium eq "xml") |
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{ |
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return $results; |
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} |
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else |
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{ |
209
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die "Unknown medium"; |
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} |
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} |
212
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213
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=head2 $self->update_cover_images({...}); |
214
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215
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Updates the cover images from Amazon. Receives one hash ref being the |
216
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arguments. Valid keys are: |
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218
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=over 4 |
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220
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=item * size |
221
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222
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The request size of the image - C<'s'>, C<'m'>, C<'l'>, |
223
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224
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=item * resize_to |
225
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226
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An optional hash ref containing width and height maximal dimensions of the |
227
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image to clip to. |
228
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229
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=item * name_cb |
230
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231
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A callback to determine the fully qualified path of the file. Receives the |
232
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following information: |
233
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234
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=over 4 |
235
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236
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=item * xml_node |
237
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238
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=item * id |
239
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240
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=item * isbn |
241
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242
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=back |
243
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=item * amazon_token |
245
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246
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An Amazon.com web services token. See L. |
247
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=item * amazon_associate |
249
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250
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An optional Amazon.com associate ID. See L. |
251
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=item * amazon_sak |
253
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254
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An optional Amazon.com Secret Access Key (sak). See L. |
255
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256
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=item * overwrite |
257
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258
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If true, instructs to overwrite the files in case they exist. |
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=back |
261
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262
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=cut |
263
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264
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sub _transform_image |
265
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{ |
266
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my ($self, $args) = @_; |
267
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268
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my $content = $args->{content}; |
269
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my $resize_to = $args->{resize_to}; |
270
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271
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if (!defined($resize_to)) |
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{ |
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return $content; |
274
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} |
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else |
276
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{ |
277
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my ($req_w, $req_h) = @{$resize_to}{qw(width height)}; |
278
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279
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my $image = Imager->new(); |
280
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$image->read(data => $content, type => "jpeg"); |
281
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282
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$image = $image->scale(xpixels => $req_w, ypixels => $req_h, type => 'min'); |
283
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284
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my $buffer = ""; |
285
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$image->write (data => \$buffer, type => "jpeg"); |
286
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287
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return $buffer; |
288
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} |
289
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} |
290
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291
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sub _get_not_available_cover_image_data |
292
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{ |
293
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my $self = shift; |
294
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open my $in, "<", File::Spec->catfile($self->_data_dir(), "na-cover.jpg"); |
295
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my $content = ""; |
296
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local $/; |
297
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$content = <$in>; |
298
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close($in); |
299
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return $content; |
300
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} |
301
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302
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sub _write_image |
303
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{ |
304
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my ($self, $contents) = @_; |
305
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306
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my $filename = $self->_img_fn(); |
307
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308
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|
open my $out, ">", $filename |
309
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|
or die "Could not open file '$filename'"; |
310
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|
print {$out} $contents; |
311
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|
close ($out); |
312
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|
} |
313
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314
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|
sub update_cover_images |
315
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|
{ |
316
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|
my ($self, $args) = @_; |
317
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318
|
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|
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|
|
my $size = $args->{size}; |
319
|
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|
|
my $name_cb = $args->{name_cb}; |
320
|
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|
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|
|
my $overwrite = $args->{overwrite}; |
321
|
|
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|
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|
322
|
|
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|
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|
|
my $amazon_token = $args->{amazon_token}; |
323
|
|
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|
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|
|
my @amazon_associate = |
324
|
|
|
|
|
|
|
( |
325
|
|
|
|
|
|
|
(exists($args->{amazon_associate}) ? |
326
|
|
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|
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|
|
(associate => $args->{amazon_associate},) : |
327
|
|
|
|
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|
|
() |
328
|
|
|
|
|
|
|
), |
329
|
|
|
|
|
|
|
(exists($args->{amazon_sak}) ? |
330
|
|
|
|
|
|
|
(sak => $args->{amazon_sak},) : |
331
|
|
|
|
|
|
|
(), |
332
|
|
|
|
|
|
|
), |
333
|
|
|
|
|
|
|
); |
334
|
|
|
|
|
|
|
|
335
|
|
|
|
|
|
|
my $dom = $self->_get_source_dom(); |
336
|
|
|
|
|
|
|
|
337
|
|
|
|
|
|
|
my @products = $dom->findnodes('//prod'); |
338
|
|
|
|
|
|
|
|
339
|
|
|
|
|
|
|
my $amazon = |
340
|
|
|
|
|
|
|
XML::Amazon->new( |
341
|
|
|
|
|
|
|
token => $amazon_token, |
342
|
|
|
|
|
|
|
@amazon_associate, |
343
|
|
|
|
|
|
|
); |
344
|
|
|
|
|
|
|
|
345
|
|
|
|
|
|
|
my $ua = LWP::UserAgent->new(); |
346
|
|
|
|
|
|
|
|
347
|
|
|
|
|
|
|
PROD_LOOP: |
348
|
|
|
|
|
|
|
foreach my $prod (@products) |
349
|
|
|
|
|
|
|
{ |
350
|
|
|
|
|
|
|
my ($asin_node) = $prod->findnodes('isbn'); |
351
|
|
|
|
|
|
|
|
352
|
|
|
|
|
|
|
my $disable = $asin_node->getAttribute("disable"); |
353
|
|
|
|
|
|
|
if (defined($disable) && ($disable eq "1")) |
354
|
|
|
|
|
|
|
{ |
355
|
|
|
|
|
|
|
next PROD_LOOP; |
356
|
|
|
|
|
|
|
} |
357
|
|
|
|
|
|
|
|
358
|
|
|
|
|
|
|
my $asin = $asin_node->textContent(); |
359
|
|
|
|
|
|
|
|
360
|
|
|
|
|
|
|
$self->_img_fn( |
361
|
|
|
|
|
|
|
$name_cb->( |
362
|
|
|
|
|
|
|
{ |
363
|
|
|
|
|
|
|
'xml_node' => $prod, |
364
|
|
|
|
|
|
|
'id' => $prod->getAttribute("id"), |
365
|
|
|
|
|
|
|
'isbn' => $asin, |
366
|
|
|
|
|
|
|
} |
367
|
|
|
|
|
|
|
) |
368
|
|
|
|
|
|
|
); |
369
|
|
|
|
|
|
|
|
370
|
|
|
|
|
|
|
if ($overwrite || (! -e $self->_img_fn())) |
371
|
|
|
|
|
|
|
{ |
372
|
|
|
|
|
|
|
my $item = $amazon->asin($asin); |
373
|
|
|
|
|
|
|
|
374
|
|
|
|
|
|
|
my $image_url = $item->image($size); |
375
|
|
|
|
|
|
|
if (!defined($image_url)) |
376
|
|
|
|
|
|
|
{ |
377
|
|
|
|
|
|
|
$self->_write_image( |
378
|
|
|
|
|
|
|
$self->_transform_image( |
379
|
|
|
|
|
|
|
{ |
380
|
|
|
|
|
|
|
%$args, |
381
|
|
|
|
|
|
|
'content' => |
382
|
|
|
|
|
|
|
$self->_get_not_available_cover_image_data(), |
383
|
|
|
|
|
|
|
} |
384
|
|
|
|
|
|
|
) |
385
|
|
|
|
|
|
|
); |
386
|
|
|
|
|
|
|
} |
387
|
|
|
|
|
|
|
else |
388
|
|
|
|
|
|
|
{ |
389
|
|
|
|
|
|
|
my $response = $ua->get($image_url); |
390
|
|
|
|
|
|
|
if ($response->is_success) |
391
|
|
|
|
|
|
|
{ |
392
|
|
|
|
|
|
|
$self->_write_image( |
393
|
|
|
|
|
|
|
$self->_transform_image( |
394
|
|
|
|
|
|
|
{ |
395
|
|
|
|
|
|
|
%$args, |
396
|
|
|
|
|
|
|
'content' => $response->content(), |
397
|
|
|
|
|
|
|
}, |
398
|
|
|
|
|
|
|
), |
399
|
|
|
|
|
|
|
); |
400
|
|
|
|
|
|
|
} |
401
|
|
|
|
|
|
|
else |
402
|
|
|
|
|
|
|
{ |
403
|
|
|
|
|
|
|
die $response->status_line(); |
404
|
|
|
|
|
|
|
} |
405
|
|
|
|
|
|
|
} |
406
|
|
|
|
|
|
|
} |
407
|
|
|
|
|
|
|
} |
408
|
|
|
|
|
|
|
} |
409
|
|
|
|
|
|
|
|
410
|
|
|
|
|
|
|
=head1 AUTHOR |
411
|
|
|
|
|
|
|
|
412
|
|
|
|
|
|
|
Shlomi Fish, C<< >> |
413
|
|
|
|
|
|
|
|
414
|
|
|
|
|
|
|
=head1 BUGS |
415
|
|
|
|
|
|
|
|
416
|
|
|
|
|
|
|
Please report any bugs or feature requests to |
417
|
|
|
|
|
|
|
C, or through the web interface at |
418
|
|
|
|
|
|
|
L. |
419
|
|
|
|
|
|
|
I will be notified, and then you'll automatically be notified of progress on |
420
|
|
|
|
|
|
|
your bug as I make changes. |
421
|
|
|
|
|
|
|
|
422
|
|
|
|
|
|
|
=head1 TODO |
423
|
|
|
|
|
|
|
|
424
|
|
|
|
|
|
|
=over 4 |
425
|
|
|
|
|
|
|
|
426
|
|
|
|
|
|
|
=item * Automatically Download Preview Images from Amazon.com |
427
|
|
|
|
|
|
|
|
428
|
|
|
|
|
|
|
=back |
429
|
|
|
|
|
|
|
|
430
|
|
|
|
|
|
|
=head1 SUPPORT |
431
|
|
|
|
|
|
|
|
432
|
|
|
|
|
|
|
You can find documentation for this module with the perldoc command. |
433
|
|
|
|
|
|
|
|
434
|
|
|
|
|
|
|
perldoc XML::Grammar::ProductsSyndication |
435
|
|
|
|
|
|
|
|
436
|
|
|
|
|
|
|
You can also look for information at: |
437
|
|
|
|
|
|
|
|
438
|
|
|
|
|
|
|
=over 4 |
439
|
|
|
|
|
|
|
|
440
|
|
|
|
|
|
|
=item * AnnoCPAN: Annotated CPAN documentation |
441
|
|
|
|
|
|
|
|
442
|
|
|
|
|
|
|
L |
443
|
|
|
|
|
|
|
|
444
|
|
|
|
|
|
|
=item * CPAN Ratings |
445
|
|
|
|
|
|
|
|
446
|
|
|
|
|
|
|
L |
447
|
|
|
|
|
|
|
|
448
|
|
|
|
|
|
|
=item * RT: CPAN's request tracker |
449
|
|
|
|
|
|
|
|
450
|
|
|
|
|
|
|
L |
451
|
|
|
|
|
|
|
|
452
|
|
|
|
|
|
|
=item * Search CPAN |
453
|
|
|
|
|
|
|
|
454
|
|
|
|
|
|
|
L |
455
|
|
|
|
|
|
|
|
456
|
|
|
|
|
|
|
=back |
457
|
|
|
|
|
|
|
|
458
|
|
|
|
|
|
|
=head1 ACKNOWLEDGEMENTS |
459
|
|
|
|
|
|
|
|
460
|
|
|
|
|
|
|
* L for their excellent XSLT Tutorial. |
461
|
|
|
|
|
|
|
|
462
|
|
|
|
|
|
|
* L for squashing some L bugs |
463
|
|
|
|
|
|
|
I reported to him. |
464
|
|
|
|
|
|
|
|
465
|
|
|
|
|
|
|
=head1 TODO |
466
|
|
|
|
|
|
|
|
467
|
|
|
|
|
|
|
=over 4 |
468
|
|
|
|
|
|
|
|
469
|
|
|
|
|
|
|
=item * Trace the progress of the Amazon.com progress. |
470
|
|
|
|
|
|
|
|
471
|
|
|
|
|
|
|
=item * More XSLT customisation. |
472
|
|
|
|
|
|
|
|
473
|
|
|
|
|
|
|
=item * Generate a table-of-contents. |
474
|
|
|
|
|
|
|
|
475
|
|
|
|
|
|
|
=back |
476
|
|
|
|
|
|
|
|
477
|
|
|
|
|
|
|
=head1 COPYRIGHT & LICENSE |
478
|
|
|
|
|
|
|
|
479
|
|
|
|
|
|
|
Copyright 2006 Shlomi Fish, all rights reserved. |
480
|
|
|
|
|
|
|
|
481
|
|
|
|
|
|
|
This program is released under the following license: MIT X11. |
482
|
|
|
|
|
|
|
|
483
|
|
|
|
|
|
|
=cut |
484
|
|
|
|
|
|
|
|
485
|
|
|
|
|
|
|
1; # End of XML::Grammar::ProductsSyndication |