/**
* @param array $book_contents
* @param array $metadata
*/
protected function echoMetaData($book_contents, $metadata)
{
foreach ($metadata as $name => $content) {
$name = Sanitize\sanitize_xml_id(str_replace('_', '-', $name));
$content = trim(strip_tags(html_entity_decode($content)));
// Plain text
$content = preg_replace('/\\s+/', ' ', preg_replace('/\\n+/', ' ', $content));
// Normalize whitespaces
$content = Sanitize\sanitize_xml_attribute($content);
printf('<meta name="%s" content="%s" />', $name, $content);
echo "\n";
}
}
/**
* @param $book_contents
*
* @return mixed
*/
protected function preProcessBookContents($book_contents)
{
// We need to change global $id for shortcodes, the_content, ...
global $id;
$old_id = $id;
// Do root level structures first.
foreach ($book_contents as $type => $struct) {
if (preg_match('/^__/', $type)) {
continue;
}
// Skip __magic keys
foreach ($struct as $i => $val) {
if (isset($val['post_content'])) {
$id = $val['ID'];
$book_contents[$type][$i]['post_content'] = $this->preProcessPostContent($val['post_content']);
}
if (isset($val['post_title'])) {
$book_contents[$type][$i]['post_title'] = Sanitize\sanitize_xml_attribute($val['post_title']);
}
if (isset($val['post_name'])) {
$book_contents[$type][$i]['post_name'] = $this->preProcessPostName($val['post_name']);
}
if ('part' == $type) {
// Do chapters, which are embedded in part structure
foreach ($book_contents[$type][$i]['chapters'] as $j => $val2) {
if (isset($val2['post_content'])) {
$id = $val2['ID'];
$book_contents[$type][$i]['chapters'][$j]['post_content'] = $this->preProcessPostContent($val2['post_content']);
}
if (isset($val2['post_title'])) {
$book_contents[$type][$i]['chapters'][$j]['post_title'] = Sanitize\sanitize_xml_attribute($val2['post_title']);
}
if (isset($val2['post_name'])) {
$book_contents[$type][$i]['chapters'][$j]['post_name'] = $this->preProcessPostName($val2['post_name']);
}
}
}
}
}
$id = $old_id;
return $book_contents;
}
/**
* Takes a known string from metadata, builds a url to hit an api which returns an xml response
* @see https://api.creativecommons.org/docs/readme_15.html
*
* @param string $type license type
* @param string $copyright_holder of the page
* @param string $src_url of the page
* @param string $title of the page
* @return string $xml response
*/
static function getLicenseXml($type, $copyright_holder, $src_url, $title, $lang = '')
{
$endpoint = 'https://api.creativecommons.org/rest/1.5/';
$lang = !empty($lang) ? substr($lang, 0, 2) : '';
$expected = array('public-domain' => array('license' => 'zero', 'commercial' => 'y', 'derivatives' => 'y'), 'cc-by' => array('license' => 'standard', 'commercial' => 'y', 'derivatives' => 'y'), 'cc-by-sa' => array('license' => 'standard', 'commercial' => 'y', 'derivatives' => 'sa'), 'cc-by-nd' => array('license' => 'standard', 'commercial' => 'y', 'derivatives' => 'n'), 'cc-by-nc' => array('license' => 'standard', 'commercial' => 'n', 'derivatives' => 'y'), 'cc-by-nc-sa' => array('license' => 'standard', 'commercial' => 'n', 'derivatives' => 'sa'), 'cc-by-nc-nd' => array('license' => 'standard', 'commercial' => 'n', 'derivatives' => 'n'), 'all-rights-reserved' => array());
// nothing meaningful to hit the api with, so bail
if (!array_key_exists($type, $expected)) {
return '';
}
switch ($type) {
// api doesn't have an 'all-rights-reserved' endpoint, so manual build necessary
case 'all-rights-reserved':
$xml = '<result><html>' . "<span property='dct:title'>" . Sanitize\sanitize_xml_attribute($title) . '</span> © ' . Sanitize\sanitize_xml_attribute($copyright_holder) . '. ' . __('All Rights Reserved', 'pressbooks') . '.</html></result>';
break;
// case 'other':
// //@TODO
// break;
// case 'other':
// //@TODO
// break;
default:
$key = array_keys($expected[$type]);
$val = array_values($expected[$type]);
// build the url
$url = $endpoint . $key[0] . '/' . $val[0] . '/get?' . $key[1] . '=' . $val[1] . '&' . $key[2] . '=' . $val[2] . '&creator=' . urlencode($copyright_holder) . '&attribution_url=' . urlencode($src_url) . '&title=' . urlencode($title) . '&locale=' . $lang;
$xml = wp_remote_get($url);
$ok = wp_remote_retrieve_response_code($xml);
// if server response is not ok
if (200 != $ok) {
return '';
}
// if remote call went sideways
if (!is_wp_error($xml)) {
$xml = $xml['body'];
} else {
// Something went wrong
\error_log('\\Pressbooks\\Metadata::getLicenseXml error: ' . $xml->get_error_message());
}
break;
}
return $xml;
}
