protected function createOPF($book_contents, $metadata)
{
if (empty($this->manifest)) {
throw new \Exception('$this->manifest cannot be empty. Did you forget to call $this->createOEPBS() ?');
}
$vars = array('meta' => $metadata, 'manifest' => $this->manifest, 'stylesheet' => $this->stylesheet, 'lang' => $this->lang);
$vars['manifest_assets'] = $this->buildManifestAssetsHtml();
$vars['do_copyright_license'] = strip_tags($this->doCopyrightLicense($metadata));
// Loop through the html files for the manifest and assemble them. Assign properties based on their content.
//
$html = '';
foreach ($this->manifest as $k => $v) {
$properties = $this->getProperties($this->tmpDir . '/OEBPS/' . $v['filename']);
array_key_exists('mathml', $properties) ? $mathml = 'properties="mathml" ' : ($mathml = '');
array_key_exists('scripted', $properties) ? $scripted = 'properties="scripted" ' : ($scripted = '');
$html .= sprintf('<item id="%s" href="OEBPS/%s" %s%smedia-type="application/xhtml+xml" />', $k, $v['filename'], $mathml, $scripted) . "\n\t\t";
}
$vars['manifest_filelist'] = $html;
// Put contents
file_put_contents($this->tmpDir . '/book.opf', $this->loadTemplate($this->dir . '/templates/epub3/opf.php', $vars));
}
