<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\WebLink;
use Psr\Link\EvolvableLinkInterface;
class Link implements EvolvableLinkInterface
{
// Relations defined in https://www.w3.org/TR/html5/links.html#links and applicable on link elements
public const REL_ALTERNATE = 'alternate';
public const REL_AUTHOR = 'author';
public const REL_HELP = 'help';
public const REL_ICON = 'icon';
public const REL_LICENSE = 'license';
public const REL_SEARCH = 'search';
public const REL_STYLESHEET = 'stylesheet';
public const REL_NEXT = 'next';
public const REL_PREV = 'prev';
// Relation defined in https://www.w3.org/TR/preload/
public const REL_PRELOAD = 'preload';
// Relations defined in https://www.w3.org/TR/resource-hints/
public const REL_DNS_PREFETCH = 'dns-prefetch';
public const REL_PRECONNECT = 'preconnect';
public const REL_PREFETCH = 'prefetch';
public const REL_PRERENDER = 'prerender';
// Extra relations
public const REL_MERCURE = 'mercure';
private $href = '';
/**
* @var string[]
*/
private $rel = [];
/**
* @var array<string, string|bool|string[]>
*/
private $attributes = [];
public function __construct(string $rel = null, string $href = '')
{
if (null !== $rel) {
$this->rel[$rel] = $rel;
}
$this->href = $href;
}
/**
* {@inheritdoc}
*/
public function getHref(): string
{
return $this->href;
}
/**
* {@inheritdoc}
*/
public function isTemplated(): bool
{
return $this->hrefIsTemplated($this->href);
}
/**
* {@inheritdoc}
*/
public function getRels(): array
{
return array_values($this->rel);
}
/**
* {@inheritdoc}
*/
public function getAttributes(): array
{
return $this->attributes;
}
/**
* {@inheritdoc}
*
* @return static
*/
public function withHref($href)
{
$that = clone $this;
$that->href = $href;
return $that;
}
/**
* {@inheritdoc}
*
* @return static
*/
public function withRel($rel)
{
$that = clone $this;
$that->rel[$rel] = $rel;
return $that;
}
/**
* {@inheritdoc}
*
* @return static
*/
public function withoutRel($rel)
{
$that = clone $this;
unset($that->rel[$rel]);
return $that;
}
/**
* {@inheritdoc}
*
* @param string|\Stringable|int|float|bool|string[] $value
*
* @return static
*/
public function withAttribute($attribute, $value)
{
$that = clone $this;
$that->attributes[$attribute] = $value;
return $that;
}
/**
* {@inheritdoc}
*
* @return static
*/
public function withoutAttribute($attribute)
{
$that = clone $this;
unset($that->attributes[$attribute]);
return $that;
}
private function hrefIsTemplated(string $href): bool
{
return str_contains($href, '{') || str_contains($href, '}');
}
}