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<?php
/**
* League.Uri (https://uri.thephpleague.com)
*
* (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace League\Uri;
use League\Uri\Contracts\UriException;
use League\Uri\Contracts\UriInterface;
use League\Uri\Exceptions\SyntaxError;
use League\Uri\Exceptions\TemplateCanNotBeExpanded;
use League\Uri\UriTemplate\Template;
use League\Uri\UriTemplate\VariableBag;
use Stringable;
/**
* Defines the URI Template syntax and the process for expanding a URI Template into a URI reference.
*
* @link https://tools.ietf.org/html/rfc6570
* @package League\Uri
* @author Ignace Nyamagana Butera <nyamsprod@gmail.com>
* @since 6.1.0
*
* Based on GuzzleHttp\UriTemplate class in Guzzle v6.5.
* @link https://github.com/guzzle/guzzle/blob/6.5/src/UriTemplate.php
*/
final class UriTemplate
{
public readonly Template $template;
public readonly VariableBag $defaultVariables;
/**
* @throws SyntaxError if the template syntax is invalid
* @throws TemplateCanNotBeExpanded if the template variables are invalid
*/
public function __construct(Template|Stringable|string $template, VariableBag|array $defaultVariables = [])
{
$this->template = $template instanceof Template ? $template : Template::createFromString($template);
$this->defaultVariables = $this->filterVariables($defaultVariables);
}
public static function __set_state(array $properties): self
{
return new self($properties['template'], $properties['defaultVariables']);
}
/**
* Filters out variables for the given template.
*
* @param array<string,string|array<string>> $variables
*/
private function filterVariables(VariableBag|array $variables): VariableBag
{
return array_reduce(
$this->template->variableNames,
function (VariableBag $curry, string $name) use ($variables): VariableBag {
if (isset($variables[$name])) {
$curry[$name] = $variables[$name];
}
return $curry;
},
new VariableBag()
);
}
/**
* The template string.
*/
public function getTemplate(): string
{
return $this->template->value;
}
/**
* Returns the names of the variables in the template, in order.
*
* @return string[]
*/
public function getVariableNames(): array
{
return $this->template->variableNames;
}
/**
* Returns the default values used to expand the template.
*
* The returned list only contains variables whose name is part of the current template.
*
* @return array<string,string|array>
*/
public function getDefaultVariables(): array
{
return $this->defaultVariables->all();
}
/**
* Returns a new instance with the updated default variables.
*
* This method MUST retain the state of the current instance, and return
* an instance that contains the modified default variables.
*
* If present, variables whose name is not part of the current template
* possible variable names are removed.
*/
public function withDefaultVariables(VariableBag|array $defaultDefaultVariables): self
{
return new self($this->template, $defaultDefaultVariables);
}
/**
* @throws TemplateCanNotBeExpanded if the variable contains nested array values
* @throws UriException if the resulting expansion can not be converted to a UriInterface instance
*/
public function expand(VariableBag|array $variables = []): UriInterface
{
return Uri::createFromString(
$this->template->expand(
$this->filterVariables($variables)->replace($this->defaultVariables)
)
);
}
}
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