Your IP : 216.73.217.9
<?php
namespace YOOtheme\View;
use YOOtheme\Event;
use YOOtheme\Metadata;
/**
* Manages HTML elements belonging to the metadata content category.
*
* @link https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Content_categories#Metadata_content
*/
class MetadataManager implements Metadata, \IteratorAggregate
{
/**
* @var array
*/
protected $prefix = ['article', 'fb', 'og', 'twitter'];
/**
* @var array
*/
protected $metadata = [];
/**
* @inheritdoc
*/
public function all(...$names)
{
if (!$names) {
return $this->metadata;
}
$result = [];
foreach ($names as $name) {
$prefix = substr($name, -1) === '*' ? substr($name, 0, -1) : false;
foreach ($this->metadata as $metadata) {
if (
isset($this->metadata[$name]) ||
($prefix && substr($metadata->name, 0, strlen($prefix)) === $prefix)
) {
$result[$metadata->name] = $metadata;
}
}
}
return $result;
}
/**
* @inheritdoc
*/
public function get($name)
{
return isset($this->metadata[$name]) ? $this->metadata[$name] : null;
}
/**
* @inheritdoc
*/
public function set($name, $value, array $attributes = [])
{
if (is_array($value) && !is_callable($value)) {
list($value, $attributes) = [null, array_merge($value, $attributes)];
}
$metadata = new MetadataObject($name, $value, $attributes);
$metadata = $this->resolveMetadata($metadata);
$metadata = Event::emit('metadata.load|filter', $metadata, $this);
return $this->metadata[$metadata->name] = $metadata;
}
/**
* @inheritdoc
*/
public function del($name)
{
unset($this->metadata[$name]);
}
/**
* @inheritdoc
*/
public function merge(array $metadata)
{
foreach ($metadata as $name => $value) {
$this->set($name, $value);
}
}
/**
* @inheritdoc
*/
public function filter(callable $filter)
{
return array_filter($this->metadata, $filter);
}
/**
* @inheritdoc
*/
public function render()
{
return join("\n", $this->metadata);
}
/**
* Returns an iterator for metadata tags.
*
* @return \ArrayIterator
*/
#[\ReturnTypeWillChange]
public function getIterator()
{
return new \ArrayIterator($this->metadata);
}
/**
* Resolves the metadata.
*
* @param MetadataObject $metadata
*
* @return MetadataObject
*/
protected function resolveMetadata(MetadataObject $metadata)
{
if (is_string($metadata->value)) {
$metadata = $this->resolveAttributes($metadata);
}
if ($metadata->tag === 'style' && !isset($metadata->value)) {
return $metadata->withTag('link')->withAttribute('rel', 'stylesheet');
}
if (in_array($metadata->tag, $this->prefix)) {
return $metadata->withTag('meta');
}
return $metadata;
}
/**
* Resolve the metadata attributes.
*
* @param MetadataObject $metadata
*
* @return MetadataObject
*/
protected function resolveAttributes($metadata)
{
if ($metadata->tag === 'base') {
return $metadata->withAttributes([
'href' => $metadata->value,
]);
}
if ($metadata->tag === 'link') {
return $metadata->withAttributes([
'href' => $metadata->value,
'rel' => str_replace('link:', '', $metadata->name),
]);
}
if ($metadata->tag === 'meta') {
return $metadata->withAttributes([
'name' => str_replace('meta:', '', $metadata->name),
'content' => $metadata->value,
]);
}
if (in_array($metadata->tag, $this->prefix)) {
return $metadata->withAttributes([
'property' => $metadata->name,
'content' => $metadata->value,
]);
}
return $metadata;
}
}