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helper.php
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helper.php
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<?php
/**
* Semantic plugin: Add Schema.org News Article using JSON-LD
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Giuseppe Di Terlizzi <[email protected]>
* @copyright (C) 2015-2019, Giuseppe Di Terlizzi
*/
// must be run within Dokuwiki
if (!defined('DOKU_INC')) {
die();
}
class helper_plugin_semantic extends DokuWiki_Plugin
{
private $meta = array();
private $page = null;
/**
* Get Schema.org WebSite
*
* @return array
*/
public function getWebSite()
{
global $conf;
$json_ld = array(
'@context' => 'http://schema.org',
'@type' => 'WebSite',
'url' => DOKU_URL,
'name' => $conf['title'],
'potentialAction' => array(
'@type' => 'SearchAction',
'target' => DOKU_URL . DOKU_SCRIPT . '?do=search&id={search_term_string}',
'query-input' => 'required name=search_term_string',
),
);
return $json_ld;
}
/**
* Get the metadata of the page
*
* @param string $page ID
*
* @return string
*/
public function getMetadata($page)
{
global $INFO;
global $ID;
global $license;
global $auth;
global $conf;
$this->page = cleanID($page);
$auth_check = auth_quickaclcheck($this->page);
if ((bool) preg_match('/' . trim($this->getConf('excludedPages')) . '/', $this->page)) {
return false;
}
if (!$auth_check) {
return false;
}
$this->meta = p_get_metadata($this->page);
if (isset($this->meta['plugin']['semantic']['enabled']) && !$this->meta['plugin']['semantic']['enabled']) {
return false;
}
if (!isset($this->meta['date']) || $this->meta['date'] == '') {
return false;
}
return $this->meta;
}
/**
* Get Schema.Org page type
*
* @return string
*/
public function getSchemaOrgType()
{
return ((isset($this->meta['plugin']['semantic']['schema.org']['type']))
? $this->meta['plugin']['semantic']['schema.org']['type']
: $this->getConf('defaultSchemaOrgType'));
}
/**
* Get the first image in page
*
* @return string
*/
public function getFirstImage()
{
return ((@$this->meta['relation']['firstimage']) ? $this->meta['relation']['firstimage'] : null);
}
/**
* Get the URL of the first image in page
*
* @return string
*/
public function getFirstImageURL()
{
return ($this->getFirstImage() ? ml($this->getFirstImage(), '', true, '&', true) : null);
}
/**
* Get page description
*
* @return string
*/
public function getDescription()
{
return (@$this->meta['description']['abstract'] ? $this->meta['description']['abstract'] : $this->getTitle());
}
/**
* Get author name
*
* @return string
*/
public function getAuthor()
{
return ($this->meta['creator'] ? $this->meta['creator'] : null);
}
/**
* Get author ID
*
* @return string
*/
public function getAuthorID()
{
return ($this->meta['user'] ? $this->meta['user'] : null);
}
/**
* Get the page title
*
* @return string
*/
public function getTitle()
{
return (@$this->meta['title'] ? $this->meta['title'] : null);
}
/**
* Get the create date of page
*
* @return int
*/
public function getCreatedDate()
{
return ((@$this->meta['date']['created']) ? $this->meta['date']['created'] : -1);
}
/**
* Get the modified date of page
*
* @return int
*/
public function getModifiedDate()
{
return ((@$this->meta['date']['modified']) ? $this->meta['date']['modified'] : -1);
}
/**
* Get DokuWiki license
*
* @return string
*/
public function getLicense()
{
global $license;
global $conf;
return @$license[$conf['license']];
}
/**
* Return JSON-LD structured data in according of selected Schema.org type
*
* @return array
*/
public function getStructuredData()
{
global $auth;
global $conf;
if (!count($this->meta)) {
return false;
}
$license = $this->getLicense();
$type = $this->getSchemaOrgType();
$user_data = ($this->getConf('hideMail') ? array('mail' => null) : $auth->getUserData($this->getAuthorID()));
$license_url = $license['url'];
$page_url = wl($this->page, '', true);
$description = str_replace("\n", ' ', $this->getDescription());
$created = date(DATE_W3C, $this->getCreatedDate());
$modified = date(DATE_W3C, $this->getModifiedDate());
$title = (isset($this->meta['title']) ? $this->meta['title'] : $this->page);
$wiki_logo_info = array();
$wiki_logo = tpl_getMediaFile(array(':wiki:logo.png', ':logo.png', 'images/logo.png'), true, $wiki_logo_info);
$json_ld = array(
'@context' => 'http://schema.org',
'@type' => $type,
'headline' => $title,
'name' => $title,
'datePublished' => $created,
'dateCreated' => $created,
'dateModified' => $modified,
'description' => $description,
'license' => $license_url,
'url' => $page_url,
'mainEntityOfPage' => array(
'@type' => 'WebPage',
'@id' => $page_url,
),
'publisher' => array(
'@type' => 'Organization',
'name' => $conf['title'],
'logo' => array(
'@type' => 'ImageObject',
'url' => $wiki_logo,
),
),
);
if ($image_url = $this->getFirstImageURL()) {
$image_info = array();
$article_image = tpl_getMediaFile(array(':' . $this->getFirstImage()), true, $image_info);
$json_ld['image'] = array(
'@type' => 'ImageObject',
'url' => $image_url,
'width' => $image_info[0],
'height' => $image_info[1],
);
} else {
// Fallback
//$json_ld['image'] = $json_ld['publisher']['logo'];
}
if ($author = $this->getAuthor()) {
$json_ld['author'] = array(
'@context' => 'http://schema.org',
'@type' => 'Person',
'name' => $author,
'email' => $user_data['mail'],
);
if (isset($this->meta['contributor'])) {
foreach ($this->meta['contributor'] as $uid => $fullname) {
$contributor_data = ($this->getConf('hideMail') ? array('mail' => null) : $auth->getUserData($uid));
$json_ld['contributor'][] = array(
'@context' => 'http://schema.org',
'@type' => 'Person',
'name' => $fullname,
'email' => $contributor_data['mail'],
);
}
}
}
return $json_ld;
}
public function getJsonLD()
{
$json_ld = array();
if ($structured_data = $this->getStructuredData()) {
$json_ld[] = $structured_data;
}
if ($backlinks = $this->getBacklinks()) {
$json_ld[] = $backlinks;
}
return $json_ld;
}
public function getBacklinks()
{
if (!$backlinks = ft_backlinks($this->page)) {
return false;
}
$json_ld_webpage = array(
'@context' => 'http://schema.org',
'@type' => 'WebPage',
);
foreach ($backlinks as $pageid) {
$json_ld_webpage['relatedLink'][] = wl($pageid, '', true);
}
if (isset($json_ld_webpage['relatedLink'])) {
return $json_ld_webpage;
}
}
public function getDublinCore()
{
global $conf;
if (!$this->meta) {
return array();
}
$license = $this->getLicense();
$contributors = array();
if (isset($this->meta['contributor']) && is_array($this->meta['contributor'])) {
foreach ($this->meta['contributor'] as $uid => $fullname) {
$contributors[] = $fullname;
}
}
$dublin_core = array(
'DC.Title' => $this->getTitle(),
'DC.Description' => str_replace("\n", ' ', $this->getDescription()),
'DC.Publisher' => $this->getAuthor(),
'DC.Contributors' => implode(', ', $contributors),
'DC.Rights' => $license['name'],
'DC.Language' => $conf['lang'],
'DC.Created' => date(DATE_W3C, $this->getCreatedDate()),
'DC.Modified' => date(DATE_W3C, $this->getModifiedDate()),
'DC.Date' => date(DATE_W3C, $this->getCreatedDate()),
'DC.Identifier' => "urn:" . $this->page,
);
return $dublin_core;
}
public function getOpenGraph()
{
global $conf;
if (!$this->meta) {
return array();
}
$locale = $conf['lang'];
if ($locale == 'en') {
$locale = 'en_GB';
} else {
$locale .= '_' . strtoupper($locale);
}
$open_graph = array(
'og:title' => $this->getTitle(),
'og:description' => str_replace("\n", ' ', $this->getDescription()),
'og:url' => wl($this->page, '', true),
'og:type' => 'article',
'og:image' => $this->getFirstImageURL(),
'og:locale' => $locale,
'og:site_name' => $conf['title'],
'article:published_time' => date(DATE_W3C, $this->getCreatedDate()),
'article:modified_time' => date(DATE_W3C, $this->getModifiedDate()),
'article:section' => date(DATE_W3C, $this->getModifiedDate()),
'article:author' => $this->getAuthor(),
);
return $open_graph;
}
}