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<?php
namespace T4\Helper;
use Joomla\CMS\Factory;
use Joomla\CMS\Layout\LayoutHelper;
use Joomla\Registry\Registry as JRegistry;
use Joomla\CMS\HTML\HTMLHelper;
use Joomla\CMS\Uri\Uri;
class Metadata {
public static $metaNr = 0;
public static function renderTag($name, $content, $type = 1)
{
$document = Factory::getDocument();
// Encoded html tags can still be rendered, decode and strip tags first.
$value = trim(strip_tags(html_entity_decode($content)));
// OG tag
if ($type == 1) {
$document->setMetadata(htmlspecialchars($name, ENT_COMPAT, 'UTF-8'), htmlspecialchars($value, ENT_COMPAT, 'UTF-8'));
} else {
$attributes = '';
if ($name == 'og:image') {
$attributes = ' itemprop="image"';
}
$document->addCustomTag('<meta property="'.htmlspecialchars($name, ENT_COMPAT, 'UTF-8').'"'.$attributes.' content="' . htmlspecialchars($value, ENT_COMPAT, 'UTF-8') . '" />');
}
}
public static function renderOpenGraph($context, $item, $params)
{
if(Factory::getApplication()->isClient('administrator')) return;
if(!$params) return;
// load global data from file
$global = new JRegistry();
$global->loadString(Path::getFileContent('etc/global.json'));
if(!$global->get('system_opengraph',"")) return;
$app = Factory::getApplication();
$doc = Factory::getDocument();
$config = Factory::getConfig();
$option = $app->input->getCmd('option','');
if(!$params instanceof JRegistry){
$params = new JRegistry($params);
}
$uri = Uri::getInstance();
$og_url = $uri->toString();
$og_title = $params->get('og_title', '');
$og_desc = $params->get('og_desc','');
$og_image = $params->get('og_img','');
$views = $app->input->getCmd('view','');
if($views == 'tag') return;
if(self::$metaNr > 0) return;
if(in_array('com_content',explode('.', $context))){
if($views == 'category' && self::$metaNr == 0){
if(!$og_title) $og_title = $doc->title;
if(!$og_desc){
$og_desc = HTMLHelper::_('string.truncate', trim(strip_tags($item->metadesc ?: (!empty($item->description) ? $item->description : ""))), 220);
}
if(!$og_image){
$og_image = $params->get('image');
}
self::$metaNr = 1;
}elseif($views == 'featured' && self::$metaNr == 0){
if(!$og_title) $og_title = $doc->title;
if(!$og_desc){
$og_desc = $doc->description;
}
self::$metaNr = 1;
}else{
if(!$og_title) $og_title = $item->title ?: $doc->title;
if(!$og_desc){
$og_desc = HTMLHelper::_('string.truncate', trim(strip_tags($item->metadesc ?: ($item->introtext ?: ($item->fulltext ?: '')))), 220);
}
if(!$og_image){
$images = json_decode($item->images ?: '{}');
$og_image = $images->image_intro ?: ($images->image_fulltext ?: "");
if(!$og_image) $og_image = self::findImage($item->text ?: $item->introtext." ".$item->fulltext);
}
}
}elseif ($context === 'com_contact.contact') {
if(!$og_title) $og_title = $item->name;
if(!$og_desc){
$og_desc = HTMLHelper::_('string.truncate', trim(strip_tags($item->metadesc ?: ($item->misc ?: ''))), 220);
}
if(!$og_image){
$og_image = $item->image;
}
}else{
if(!$og_title && !$og_desc) return;
}
$img_url = self::cleanImageURL($og_image);
//check more space for each word
if($og_desc){
$og_desc_arr = explode(" ",$og_desc);
$og_desc_arr = array_filter(array_map(
function($a){
if(!is_null(str_replace("\r\n","",$a))){
return str_replace("\r\n","",$a);
};
},
$og_desc_arr));
$og_desc = implode(" ",$og_desc_arr);
}else{
$og_desc = $doc->description ?: '';
}
self::renderTag('title', $og_title);
self::renderTag('description', trim($og_desc));
self::renderTag('og:title', $og_title, 2);
self::renderTag('og:description', trim($og_desc), 2);
if($img_url->url) self::renderTag('og:image', self::fullImageURL($img_url->url), 2);
self::renderTag('og:url', $og_url, 2);
self::renderTag('twitter:title', $og_title, 2);
self::renderTag('twitter:description', trim($og_desc), 2);
if($img_url->url) self::renderTag('twitter:image', self::fullImageURL($img_url->url), 2);
self::renderTag('twitter:url', $og_url, 2);
}
public static function findImage($content)
{
if(gettype($content) !== 'string') return "";
$img_url = '';
preg_match('/< *img[^>]*src *= *["\']?([^"\']*)/i', $content, $src);
if (isset($src[1]) && $src[1] != '') {
$img_url = $src[1];
}
return $img_url;
}
public static function fullImageURL($image)
{
$linkImg = $image;
$absU = 0;
// Test if this link is absolute http:// then do not change it
$pos1 = strpos($image, 'http://');
if ($pos1 === false) {
} else {
$absU = 1;
}
// Test if this link is absolute https:// then do not change it
$pos2 = strpos($image, 'https://');
if ($pos2 === false) {
} else {
$absU = 1;
}
if ($absU == 1) {
$linkImg = $image;
} else {
$linkImg = Uri::base(false).$image;
if ($image[0] == '/') {
$myURI = new \Joomla\Uri\Uri(Uri::base(false));
$myURI->setPath($image);
$linkImg = $myURI->toString();
}
}
return $linkImg;
}
/**
* Gets a URL, cleans the Joomla specific params and returns an object
*
* @param string $url The relative or absolute URL to use for the src attribute.
*
* @return object
* @example {
* url: 'string',
* attributes: [
* width: integer,
* height: integer,
* ]
* }
*
* @since 4.0.0
*/
public static function cleanImageURL($url)
{
$obj = new \stdClass;
$obj->attributes = [
'width' => 0,
'height' => 0,
];
if ($url && !strpos($url, '?'))
{
$obj->url = $url;
return $obj;
}
$mediaUri = new Uri($url);
// Old image URL format
if ($mediaUri->hasVar('joomla_image_height'))
{
$height = (int) $mediaUri->getVar('joomla_image_height');
$width = (int) $mediaUri->getVar('joomla_image_width');
$mediaUri->delVar('joomla_image_height');
$mediaUri->delVar('joomla_image_width');
}
else
{
// New Image URL format
$fragmentUri = new Uri($mediaUri->getFragment());
$width = (int) $fragmentUri->getVar('width', 0);
$height = (int) $fragmentUri->getVar('height', 0);
}
if ($width > 0)
{
$obj->attributes['width'] = $width;
}
if ($height > 0)
{
$obj->attributes['height'] = $height;
}
$mediaUri->setFragment('');
$obj->url = $mediaUri->toString();
return $obj;
}
}