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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\UriTemplate;
use League\Uri\Exceptions\SyntaxError;
use League\Uri\Exceptions\TemplateCanNotBeExpanded;
use Stringable;
use function array_unique;
use function preg_match_all;
use function preg_replace;
use function str_contains;
use const PREG_SET_ORDER;
final class Template
{
/**
* Expression regular expression pattern.
*/
private const REGEXP_EXPRESSION_DETECTOR = '/\{[^}]*}/x';
/** @var array<string, Expression> */
private array $expressions = [];
/** @var array<string> */
public readonly array $variableNames;
private function __construct(public readonly string $value, Expression ...$expressions)
{
$variableNames = [];
foreach ($expressions as $expression) {
$this->expressions[$expression->value] = $expression;
$variableNames = [...$variableNames, ...$expression->variableNames];
}
$this->variableNames = array_unique($variableNames);
}
/**
* @param array{value:string, template?:string, expressions:array<string, Expression>} $properties
*/
public static function __set_state(array $properties): self
{
return new self($properties['template'] ?? $properties['value'], ...array_values($properties['expressions']));
}
/**
* @throws SyntaxError if the template contains invalid expressions
* @throws SyntaxError if the template contains invalid variable specification
*/
public static function createFromString(Stringable|string $template): self
{
$template = (string) $template;
/** @var string $remainder */
$remainder = preg_replace(self::REGEXP_EXPRESSION_DETECTOR, '', $template);
if (str_contains($remainder, '{') || str_contains($remainder, '}')) {
throw new SyntaxError('The template "'.$template.'" contains invalid expressions.');
}
$names = [];
preg_match_all(self::REGEXP_EXPRESSION_DETECTOR, $template, $findings, PREG_SET_ORDER);
$arguments = [];
foreach ($findings as $finding) {
if (!isset($names[$finding[0]])) {
$arguments[] = Expression::createFromString($finding[0]);
$names[$finding[0]] = 1;
}
}
return new self($template, ...$arguments);
}
/**
* @deprecated since version 6.6.0 use the readonly property instead
* @codeCoverageIgnore
*/
public function toString(): string
{
return $this->value;
}
/**
* @deprecated since version 6.6.0 use the readonly property instead
* @codeCoverageIgnore
*
* @return array<string>
*/
public function variableNames(): array
{
return $this->variableNames;
}
/**
* @throws TemplateCanNotBeExpanded if the variables is an array and a ":" modifier needs to be applied
* @throws TemplateCanNotBeExpanded if the variables contains nested array values
*/
public function expand(VariableBag $variables): string
{
$uriString = $this->value;
/** @var Expression $expression */
foreach ($this->expressions as $pattern => $expression) {
$uriString = str_replace($pattern, $expression->expand($variables), $uriString);
}
return $uriString;
}
}
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