407 lines
11 KiB
PHP
407 lines
11 KiB
PHP
<?php
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/**
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* Semantic plugin: Add Schema.org News Article using JSON-LD
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*
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* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
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* @author Giuseppe Di Terlizzi <giuseppe.diterlizzi@gmail.com>
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* @copyright (C) 2015-2022, Giuseppe Di Terlizzi
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*/
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class helper_plugin_semantic extends DokuWiki_Plugin
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{
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private $meta = array();
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private $page = null;
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/**
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* Get Schema.org WebSite
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*
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* @return array
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*/
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public function getWebSite()
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{
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global $conf;
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$json_ld = array(
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'@context' => 'http://schema.org/',
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'@type' => 'WebSite',
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'url' => DOKU_URL,
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'name' => $conf['title'],
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'potentialAction' => array(
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'@type' => 'SearchAction',
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'target' => DOKU_URL . DOKU_SCRIPT . '?do=search&id={search_term_string}',
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'query-input' => 'required name=search_term_string',
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),
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);
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return $json_ld;
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}
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/**
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* Get the metadata of the page
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*
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* @param string $page ID
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*
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* @return string
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*/
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public function getMetadata($page)
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{
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global $INFO;
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global $ID;
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global $license;
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global $auth;
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global $conf;
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$this->page = cleanID($page);
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$auth_check = auth_quickaclcheck($this->page);
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if ((bool) preg_match('/' . trim($this->getConf('excludedPages')) . '/', $this->page)) {
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return false;
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}
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if (!$auth_check) {
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return false;
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}
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$this->meta = p_get_metadata($this->page);
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if (isset($this->meta['plugin']['semantic']['enabled']) && !$this->meta['plugin']['semantic']['enabled']) {
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return false;
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}
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if (!isset($this->meta['date']) || $this->meta['date'] == '') {
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return false;
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}
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return $this->meta;
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}
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/**
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* Get Schema.Org page type
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*
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* @return string
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*/
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public function getSchemaOrgType()
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{
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return ((isset($this->meta['plugin']['semantic']['schema.org']['type']))
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? $this->meta['plugin']['semantic']['schema.org']['type']
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: $this->getConf('defaultSchemaOrgType'));
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}
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/**
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* Get the first image in page
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*
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* @return string
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*/
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public function getFirstImage()
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{
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return (isset($this->meta['relation']['firstimage']) ? $this->meta['relation']['firstimage'] : null);
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}
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/**
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* Get the URL of the first image in page
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*
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* @return string
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*/
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public function getFirstImageURL()
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{
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return ($this->getFirstImage() ? ml($this->getFirstImage(), '', true, '&', true) : null);
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}
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/**
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* Get page description
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*
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* @return string
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*/
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public function getDescription()
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{
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return (isset($this->meta['description']['abstract']) ? $this->meta['description']['abstract'] : $this->getTitle());
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}
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/**
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* Get author name
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*
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* @return string
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*/
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public function getAuthor()
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{
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return ( array_key_exists('creator', $this->meta) ) ?
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$this->meta['creator'] : null;
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}
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/**
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* Get author ID
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*
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* @return string
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*/
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public function getAuthorID()
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{
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return ( array_key_exists('user', $this->meta) ) ?
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$this->meta['user'] : null;
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}
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/**
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* Get the page title
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*
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* @return string
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*/
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public function getTitle()
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{
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return (isset($this->meta['title']) ? $this->meta['title'] : null);
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}
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/**
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* Get the create date of page
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*
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* @return int
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*/
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public function getCreatedDate()
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{
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return (isset($this->meta['date']['created']) ? $this->meta['date']['created'] : -1);
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}
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/**
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* Get the modified date of page
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*
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* @return int
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*/
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public function getModifiedDate()
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{
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return (isset($this->meta['date']['modified']) ? $this->meta['date']['modified'] : -1);
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}
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/**
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* Get DokuWiki license
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*
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* @return string
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*/
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public function getLicense()
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{
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global $license;
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global $conf;
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return (isset($license[$conf['license']]) ? $license[$conf['license']] : null);
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}
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/**
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* Return JSON-LD structured data in according of selected Schema.org type
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*
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* @return array
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*/
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public function getStructuredData()
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{
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global $auth;
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global $conf;
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if (!count($this->meta)) {
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return false;
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}
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$license = $this->getLicense();
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$type = $this->getSchemaOrgType();
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$user_data = ($this->getConf('hideMail') ? array('mail' => null) : $auth->getUserData($this->getAuthorID()));
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$license_url = $license['url'];
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$page_url = wl($this->page, '', true);
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$description = str_replace("\n", ' ', $this->getDescription());
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$created = date(DATE_W3C, $this->getCreatedDate());
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$modified = date(DATE_W3C, $this->getModifiedDate());
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$title = (isset($this->meta['title']) ? $this->meta['title'] : $this->page);
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$wiki_logo_info = array();
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$wiki_logo = tpl_getMediaFile(array(':wiki:logo.png', ':logo.png', 'images/logo.png'), true, $wiki_logo_info);
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$json_ld = array(
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'@context' => 'http://schema.org/',
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'@type' => $type,
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'headline' => $title,
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'name' => $title,
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'datePublished' => $created,
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'dateCreated' => $created,
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'dateModified' => $modified,
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'description' => $description,
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'license' => $license_url,
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'url' => $page_url,
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'mainEntityOfPage' => array(
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'@type' => 'WebPage',
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'@id' => $page_url,
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),
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'publisher' => array(
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'@type' => 'Organization',
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'name' => $conf['title'],
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'logo' => array(
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'@type' => 'ImageObject',
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'url' => $wiki_logo,
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),
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),
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);
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if ($image_url = $this->getFirstImageURL()) {
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$image_info = array();
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$article_image = tpl_getMediaFile(array(':' . $this->getFirstImage()), true, $image_info);
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$json_ld['image'] = array(
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'@type' => 'ImageObject',
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'url' => $image_url,
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'width' => $image_info[0],
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'height' => $image_info[1],
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);
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} else {
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// Fallback
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//$json_ld['image'] = $json_ld['publisher']['logo'];
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}
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if ($author = $this->getAuthor()) {
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$json_ld['author'] = array(
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'@context' => 'http://schema.org/',
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'@type' => 'Person',
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'name' => $author,
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'email' => $user_data['mail'],
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);
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if (isset($this->meta['contributor'])) {
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foreach ($this->meta['contributor'] as $uid => $fullname) {
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$contributor_data = ($this->getConf('hideMail') ? array('mail' => null) : $auth->getUserData($uid));
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$json_ld['contributor'][] = array(
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'@context' => 'http://schema.org/',
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'@type' => 'Person',
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'name' => $fullname,
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'email' => $contributor_data['mail'],
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);
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}
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}
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}
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return $json_ld;
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}
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public function getJsonLD()
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{
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$json_ld = array();
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if ($structured_data = $this->getStructuredData()) {
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$json_ld[] = $structured_data;
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}
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if ($backlinks = $this->getBacklinks()) {
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$json_ld[] = $backlinks;
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}
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return $json_ld;
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}
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public function getBacklinks()
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{
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if (!$backlinks = ft_backlinks($this->page)) {
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return false;
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}
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$json_ld_webpage = array(
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'@context' => 'http://schema.org/',
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'@type' => 'WebPage',
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);
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foreach ($backlinks as $pageid) {
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$json_ld_webpage['relatedLink'][] = wl($pageid, '', true);
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}
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if (isset($json_ld_webpage['relatedLink'])) {
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return $json_ld_webpage;
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}
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}
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public function getDublinCore()
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{
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global $conf;
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if (!$this->meta) {
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return array();
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}
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$license = $this->getLicense();
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$contributors = array();
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if (isset($this->meta['contributor']) && is_array($this->meta['contributor'])) {
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foreach ($this->meta['contributor'] as $uid => $fullname) {
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$contributors[] = $fullname;
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}
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}
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$dublin_core = array(
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'DC.Title' => $this->getTitle(),
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'DC.Description' => str_replace("\n", ' ', $this->getDescription()),
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'DC.Publisher' => $this->getAuthor(),
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'DC.Contributors' => implode(', ', $contributors),
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'DC.Rights' => $license['name'],
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'DC.Language' => $conf['lang'],
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'DC.Created' => date(DATE_W3C, $this->getCreatedDate()),
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'DC.Modified' => date(DATE_W3C, $this->getModifiedDate()),
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'DC.Date' => date(DATE_W3C, $this->getCreatedDate()),
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'DC.Identifier' => "urn:" . $this->page,
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);
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return $dublin_core;
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}
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public function getOpenGraph()
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{
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global $conf;
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if (!$this->meta) {
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return array();
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}
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$locale = $conf['lang'];
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if ($locale == 'en') {
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$locale = 'en_GB';
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} else {
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$locale .= '_' . strtoupper($locale);
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}
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$open_graph = array(
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'og:title' => $this->getTitle(),
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'og:description' => str_replace("\n", ' ', $this->getDescription()),
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'og:url' => wl($this->page, '', true),
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'og:type' => 'article',
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'og:image' => $this->getFirstImageURL(),
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'og:locale' => $locale,
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'og:site_name' => $conf['title'],
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'article:published_time' => date(DATE_W3C, $this->getCreatedDate()),
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'article:modified_time' => date(DATE_W3C, $this->getModifiedDate()),
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'article:section' => date(DATE_W3C, $this->getModifiedDate()),
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'article:author' => $this->getAuthor(),
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);
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return $open_graph;
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}
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}
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