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<?php
use Drupal\file\Entity\File;
function epub_theme() {
return array(
'epub_formatter_cover' => array(
'variables' => array(
'file' => NULL,
'image' => 'https://upload.wikimedia.org/wikipedia/en/1/14/EPUB_logo.svg',
'width' => NULL,
),
'file' => 'epub.field.inc',
),
'epub_formatter_default' => array(
'variables' => array(
'file' => NULL,
'width' => NULL,
'height' => NULL,
),
'file' => 'epub.field.inc',
),
'epub_formatter_toc' => array(
'variables' => array(
'file' => NULL,
'toc' => NULL,
),
'file' => 'epub.field.inc',
),
'epub_formatter_js' => array(
'variables' => array(
'file' => NULL,
'reader' => NULL,
'unzipped' => TRUE,
'width' => NULL,
'height' => NULL,
),
'file' => 'epub.field.inc',
),
'epub_formatter_reader' => array(
'variables' => array(
'file' => NULL,
),
'file' => 'epub.field.inc',
),
);
}
function epub_entity_delete(Drupal\Core\Entity\EntityInterface $entity) {
if ($entity
->getEntityTypeId() == 'file') {
$destination = 'public://epub_content/' . $entity
->id();
file_unmanaged_delete_recursive($destination);
}
}
function epub_file_update(File $file) {
$destination = 'public://epub_content/' . $file
->id();
$tmp = explode('.', $file
->getFilename());
$file_extension = end($tmp);
switch ($file_extension) {
case 'epub':
file_prepare_directory($destination, FILE_CREATE_DIRECTORY);
return epub_unzip(drupal_realpath($file
->getFileUri()), $destination);
case 'ibooks':
file_prepare_directory($destination, FILE_CREATE_DIRECTORY);
return epub_unzip(drupal_realpath($file
->getFileUri()), $destination);
}
}
function epub_reset_mimetype($file) {
$tmp = explode('.', $file
->getFilename());
$file_extension = end($tmp);
switch ($file_extension) {
case 'ibooks':
$file
->setMimeType('application/x-ibooks+zip');
return $file
->save();
}
return FALSE;
}
function epub_unzip($filepath, $destination) {
$destination .= '/';
$extracted = array();
if ($z = zip_open($filepath)) {
while ($entry = zip_read($z)) {
if (zip_entry_open($z, $entry, 'r') && ($zip_entry_filesize = zip_entry_filesize($entry))) {
$entry_name = zip_entry_name($entry);
$data = zip_entry_read($entry, $zip_entry_filesize);
$filepath = $destination . $entry_name;
$parent_dir = dirname($filepath);
if (!file_exists($parent_dir)) {
file_prepare_directory($parent_dir, FILE_CREATE_DIRECTORY);
}
if ($filepath = file_unmanaged_save_data($data, $filepath, FILE_EXISTS_REPLACE)) {
$file = new StdClass();
$file->filename = $entry_name;
$file->filemime = \Drupal::service('file.mime_type.guesser')
->guess($filepath);
$file->filesize = filesize($filepath);
$extracted[] = $file;
}
zip_entry_close($entry);
}
}
zip_close($z);
}
return $extracted;
}
function epub_get_item($dir, $id) {
$file = epub_get_opf($dir);
if ($file) {
$opfXML = simplexml_load_file($file);
$opfXML
->registerXPathNamespace('opf', 'http://www.idpf.org/2007/opf');
$element = $opfXML
->xpath('//opf:item[@id="' . $id . '"]');
if (empty($element)) {
return false;
}
else {
$attributes = $element[0]
->attributes();
$href = (string) $attributes['href'];
$filename = pathinfo($href);
$scan = file_scan_directory($dir, '/.*' . $filename['basename'] . '$/');
return array_shift($scan)->uri;
}
}
else {
return false;
}
}
function epub_get_opf($dir) {
if (file_exists($dir . '/META-INF/container.xml')) {
$ocfXML = simplexml_load_file($dir . '/META-INF/container.xml');
$ocfXML
->registerXPathNamespace('ocf', 'urn:oasis:names:tc:opendocument:xmlns:container');
$rootfile = $ocfXML
->xpath('//ocf:rootfile/@full-path')[0];
return $dir . '/' . (string) $rootfile[0];
}
return false;
}
function epub_get_toc($dir, $target = FALSE) {
$file = epub_get_nav($dir);
if ($file) {
$tocXML = simplexml_load_file($file);
$tocXML
->registerXPathNamespace('xhtml', 'http://www.w3.org/1999/xhtml');
$tocXML
->registerXPathNamespace('epub', 'http://www.idpf.org/2007/ops');
foreach ($tocXML
->xpath('//xhtml:a[@href]') as $item) {
$item[0]
->attributes()->href = rawurldecode(file_create_url(dirname($file) . '/' . $item[0]
->attributes()->href));
if ($target) {
$item[0]
->addAttribute('target', $target);
}
}
$toc = $tocXML
->xpath('//*[@epub:type="toc"]');
if ($toc) {
return $toc[0]
->asXML();
}
}
$file = epub_get_ncx($dir);
if ($file) {
$tocXML = simplexml_load_file(epub_get_ncx($dir));
$tocXML = simplexml_load_file($file);
$tocXML
->registerXPathNamespace('ncx', 'http://www.daisy.org/z3986/2005/ncx/');
foreach ($tocXML
->xpath('//@src') as $item) {
$item[0] = rawurldecode(file_create_url(dirname($file) . '/' . $item[0]));
}
$toc = $tocXML
->xpath('//ncx:navMap');
if ($toc) {
$output = new SimpleXMLElement('<nav type="toc"><h2>Contents</h2></nav>');
$html = epub_ncx_item($toc[0], $target);
return $html;
}
}
return FALSE;
}
function epub_get_nav($dir) {
$file = epub_get_opf($dir);
if ($file == FALSE) {
return false;
}
$opfXML = simplexml_load_file($file);
$opfXML
->registerXPathNamespace('opf', 'http://www.idpf.org/2007/opf');
$nav = $opfXML
->xpath('//opf:item[@properties="nav"]');
if ($nav) {
$attributes = $nav[0]
->attributes();
return dirname($file) . '/' . (string) $attributes['href'];
}
else {
return FALSE;
}
}
function epub_get_ncx($dir) {
$file = epub_get_opf($dir);
if ($file == FALSE) {
return false;
}
$opfXML = simplexml_load_file($file);
$opfXML
->registerXPathNamespace('opf', 'http://www.idpf.org/2007/opf');
$ncx = $opfXML
->xpath('//opf:item[@media-type="application/x-dtbncx+xml"]');
if ($ncx) {
$attributes = $ncx[0]
->attributes();
return dirname($file) . '/' . (string) $attributes['href'];
}
else {
return FALSE;
}
}
function epub_ncx_item($navmap, $target = FALSE) {
$html = '<ol>';
foreach ($navmap as $item) {
if ($item
->attributes()->id) {
$html .= '<li><a href="' . $item->content
->attributes()->src . '"';
if ($target) {
$html .= ' target="' . $target . '" ';
}
$html .= '>' . $item->navLabel->text . '</a>';
if ($item->navPoint) {
$subitems = epub_ncx_item($item->navPoint, $target);
$html .= $subitems;
}
$html .= '</li>';
}
}
$html .= '</ol>';
return $html;
}
