* @author Christos Amyrotos @MashRoofa
*/
class Pressbooks_Metadata_General_Functions {
function __construct() {
}
/**
* A function that returns the active parent from the parent filter
* @since 0.13
*/
public static function get_active_parent(){
if(get_option('parent_filter_settings') == false){
$enabledParent = 'organization_properties';
}else{
$enabledParent = get_option('parent_filter_settings');
$enabledParent = $enabledParent['radio1'];
}
$parentNamespaces = structure::$allParents;
foreach($parentNamespaces as $parent){
if($parent::type_name[1] == $enabledParent){
return $parent;
}
}
}
/**
* Function used to remove null values from an array
* @since 0.10
*/
public static function remove_null($array) {
$cleanArray = array();
foreach($array as $item){
if($item != NULL){
$cleanArray[]=$item;
}
}
return $cleanArray;
}
/**
* Function used to extract the name of the type from its settings
* @since 0.10
*/
static public function get_type_id($type) {
foreach($type::$type_setting as $typeId => $details) {
return $typeId;
}
}
/**
* A function that returns the correct metadata for the schemaTypes classes
* If pressbooks is installed we return the metadata for the Book Info information
* If pressbooks is not installed we return the Site Meta metadata
* @since 0.9
*/
public static function get_metadata(){
if(!site_cpt::pressbooks_identify()){
return site_cpt::get_site_meta_metadata();
}else{
return \Pressbooks\Book::getBookInformation();
}
}
/**
* A function to retrieve the metatags we need for the Root level
* of the website. In Pressbooks this is the catalog of the books.
*
* @since 0.8
*/
public function get_root_level_metatags(){
$html = "\n"
."\n"
." \n"
." \n"
." \n"
." \n"
."
\n";
return $html;
}
/**
* A function to retrieve the data we need from the custom fields of PressBooks
* for Google Scholar use.
*
* @since 0.7
*/
public function get_googleScholar_metatags(){
// array of the items that we need from the General Book Information metabox
$book_info_data = array(
'citation_journal_title' => 'pb_title',
'citation_author' => 'pb_author',
'citation_language' => 'pb_language',
'citation_keywords' => 'pb_keywords_tags',
'citation_isbn' => 'pb_ebook_isbn',
'citation_publisher' => 'pb_publisher',
'citation_publication_date' => 'pb_publication_date'
);
$html = "\n";
//For the fields of General Book Information Metabox
$metadata = \Pressbooks\Book::getBookInformation();
foreach ($book_info_data as $name => $content){
if ( isset( $metadata[$content] ) ) {
// the date must be in a specific format (Y/m/d)
if ( 'pb_publication_date' == $content ) {
$metadata[$content] = date( 'Y/m/d', (int) $metadata[ $content ] );
}
$html .= "\n";
}
}
return $html;
}
}