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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 BackedEnum;
use Closure;
use JsonSerializable;
use League\Uri\Contracts\Conditionable;
use League\Uri\Contracts\Transformable;
use League\Uri\Contracts\UriComponentInterface;
use League\Uri\Contracts\UriInterface;
use League\Uri\Exceptions\SyntaxError;
use League\Uri\UriTemplate\Template;
use Stringable;
use Uri\Rfc3986\Uri as Rfc3986Uri;
use Uri\WhatWg\Url as WhatWgUrl;
use function is_bool;
use function preg_match;
use function str_replace;
use function strtolower;
/**
* @phpstan-type UrnSerialize array{0: array{urn: non-empty-string}, 1: array{}}
* @phpstan-import-type InputComponentMap from UriString
* @phpstan-type UrnMap array{
* scheme: 'urn',
* nid: string,
* nss: string,
* r_component: ?string,
* q_component: ?string,
* f_component: ?string,
* }
*/
final class Urn implements Conditionable, Stringable, JsonSerializable, Transformable
{
/**
* RFC8141 regular expression URN splitter.
*
* The regexp does not perform any look-ahead.
* Not all invalid URN are caught. Some
* post-regexp-validation checks
* are mandatory.
*
* @link https://datatracker.ietf.org/doc/html/rfc8141#section-2
*
* @var string
*/
private const REGEXP_URN_PARTS = '/^
urn:
(?<nid>[a-z0-9](?:[a-z0-9-]{0,30}[a-z0-9])?): # NID
(?<nss>.*?) # NSS
(?<frc>\?\+(?<rcomponent>.*?))? # r-component
(?<fqc>\?\=(?<qcomponent>.*?))? # q-component
(?:\#(?<fcomponent>.*))? # f-component
$/xi';
/**
* RFC8141 namespace identifier regular expression.
*
* @link https://datatracker.ietf.org/doc/html/rfc8141#section-2
*
* @var string
*/
private const REGEX_NID_SEQUENCE = '/^[a-z0-9]([a-z0-9-]{0,30})[a-z0-9]$/xi';
/** @var non-empty-string */
private readonly string $uriString;
/** @var non-empty-string */
private readonly string $nid;
/** @var non-empty-string */
private readonly string $nss;
/** @var non-empty-string|null */
private readonly ?string $rComponent;
/** @var non-empty-string|null */
private readonly ?string $qComponent;
/** @var non-empty-string|null */
private readonly ?string $fComponent;
/**
* @param Rfc3986Uri|WhatWgUrl|BackedEnum|Stringable|string $urn the percent-encoded URN
*/
public static function parse(Rfc3986Uri|WhatWgUrl|BackedEnum|Stringable|string $urn): ?Urn
{
try {
return self::fromString($urn);
} catch (SyntaxError) {
return null;
}
}
/**
* @param Rfc3986Uri|WhatWgUrl|Stringable|string $urn the percent-encoded URN
* @see self::fromString()
*
* @throws SyntaxError if the URN is invalid
*/
public static function new(Rfc3986Uri|WhatWgUrl|Stringable|string $urn): self
{
return self::fromString($urn);
}
/**
* @param Rfc3986Uri|WhatWgUrl|BackedEnum|Stringable|string $urn the percent-encoded URN
*
* @throws SyntaxError if the URN is invalid
*/
public static function fromString(Rfc3986Uri|WhatWgUrl|BackedEnum|Stringable|string $urn): self
{
$urn = match (true) {
$urn instanceof Rfc3986Uri => $urn->toRawString(),
$urn instanceof WhatWgUrl => $urn->toAsciiString(),
$urn instanceof BackedEnum => (string) $urn->value,
default => (string) $urn,
};
UriString::containsRfc3986Chars($urn) || throw new SyntaxError('The URN is malformed, it contains invalid characters.');
1 === preg_match(self::REGEXP_URN_PARTS, $urn, $matches) || throw new SyntaxError('The URN string is invalid.');
return new self(
nid: $matches['nid'],
nss: $matches['nss'],
rComponent: (isset($matches['frc']) && '' !== $matches['frc']) ? $matches['rcomponent'] : null,
qComponent: (isset($matches['fqc']) && '' !== $matches['fqc']) ? $matches['qcomponent'] : null,
fComponent: $matches['fcomponent'] ?? null,
);
}
/**
* Create a new instance from a hash representation of the URI similar
* to PHP parse_url function result.
*
* @param InputComponentMap $components a hash representation of the URI similar to PHP parse_url function result
*/
public static function fromComponents(array $components = []): self
{
$components += [
'scheme' => null, 'user' => null, 'pass' => null, 'host' => null,
'port' => null, 'path' => '', 'query' => null, 'fragment' => null,
];
return self::fromString(UriString::build($components));
}
/**
* @param Stringable|string $nss the percent-encoded NSS
*
* @throws SyntaxError if the URN is invalid
*/
public static function fromRfc2141(BackedEnum|Stringable|string $nid, BackedEnum|Stringable|string $nss): self
{
if ($nid instanceof BackedEnum) {
$nid = $nid->value;
}
if ($nss instanceof BackedEnum) {
$nss = $nss->value;
}
return new self((string) $nid, (string) $nss);
}
/**
* @param string $nss the percent-encoded NSS
* @param ?string $rComponent the percent-encoded r-component
* @param ?string $qComponent the percent-encoded q-component
* @param ?string $fComponent the percent-encoded f-component
*
* @throws SyntaxError if one of the URN part is invalid
*/
private function __construct(
string $nid,
string $nss,
?string $rComponent = null,
?string $qComponent = null,
?string $fComponent = null,
) {
('' !== $nid && 1 === preg_match(self::REGEX_NID_SEQUENCE, $nid)) || throw new SyntaxError('The URN is malformed, the NID is invalid.');
('' !== $nss && Encoder::isPathEncoded($nss)) || throw new SyntaxError('The URN is malformed, the NSS is invalid.');
/** @param Closure(string): ?non-empty-string $closure */
$validateComponent = static fn (?string $value, Closure $closure, string $name): ?string => match (true) {
null === $value,
('' !== $value && 1 !== preg_match('/[#?]/', $value) && $closure($value)) => $value,
default => throw new SyntaxError('The URN is malformed, the `'.$name.'` component is invalid.'),
};
$this->nid = $nid;
$this->nss = $nss;
$this->rComponent = $validateComponent($rComponent, Encoder::isPathEncoded(...), 'r-component');
$this->qComponent = $validateComponent($qComponent, Encoder::isQueryEncoded(...), 'q-component');
$this->fComponent = $validateComponent($fComponent, Encoder::isFragmentEncoded(...), 'f-component');
$this->uriString = $this->setUriString();
}
/**
* @return non-empty-string
*/
private function setUriString(): string
{
$str = $this->toRfc2141();
if (null !== $this->rComponent) {
$str .= '?+'.$this->rComponent;
}
if (null !== $this->qComponent) {
$str .= '?='.$this->qComponent;
}
if (null !== $this->fComponent) {
$str .= '#'.$this->fComponent;
}
return $str;
}
/**
* Returns the NID.
*
* @return non-empty-string
*/
public function getNid(): string
{
return $this->nid;
}
/**
* Returns the percent-encoded NSS.
*
* @return non-empty-string
*/
public function getNss(): string
{
return $this->nss;
}
/**
* Returns the percent-encoded r-component string or null if it is not set.
*
* @return ?non-empty-string
*/
public function getRComponent(): ?string
{
return $this->rComponent;
}
/**
* Returns the percent-encoded q-component string or null if it is not set.
*
* @return ?non-empty-string
*/
public function getQComponent(): ?string
{
return $this->qComponent;
}
/**
* Returns the percent-encoded f-component string or null if it is not set.
*
* @return ?non-empty-string
*/
public function getFComponent(): ?string
{
return $this->fComponent;
}
/**
* Returns the RFC8141 URN string representation.
*
* @return non-empty-string
*/
public function toString(): string
{
return $this->uriString;
}
/**
* Returns the RFC2141 URN string representation.
*
* @return non-empty-string
*/
public function toRfc2141(): string
{
return 'urn:'.$this->nid.':'.$this->nss;
}
/**
* Returns the human-readable string representation of the URN as an IRI.
*
* @see https://datatracker.ietf.org/doc/html/rfc3987
*/
public function toDisplayString(): string
{
return UriString::toIriString($this->uriString);
}
/**
* Returns the RFC8141 URN string representation.
*
* @see self::toString()
*
* @return non-empty-string
*/
public function __toString(): string
{
return $this->toString();
}
/**
* Returns the RFC8141 URN string representation.
* @see self::toString()
*
* @return non-empty-string
*/
public function jsonSerialize(): string
{
return $this->toString();
}
/**
* Returns the RFC3986 representation of the current URN.
*
* If a template URI is used the following variables as present
* {nid} for the namespace identifier
* {nss} for the namespace specific string
* {r_component} for the r-component without its delimiter
* {q_component} for the q-component without its delimiter
* {f_component} for the f-component without its delimiter
*/
public function resolve(UriTemplate|Template|BackedEnum|string|null $template = null): UriInterface
{
return null !== $template ? Uri::fromTemplate($template, $this->toComponents()) : Uri::new($this->uriString);
}
public function hasRComponent(): bool
{
return null !== $this->rComponent;
}
public function hasQComponent(): bool
{
return null !== $this->qComponent;
}
public function hasFComponent(): bool
{
return null !== $this->fComponent;
}
public function hasOptionalComponent(): bool
{
return null !== $this->rComponent
|| null !== $this->qComponent
|| null !== $this->fComponent;
}
/**
* Return an instance with the specified NID.
*
* This method MUST retain the state of the current instance, and return
* an instance that contains the specified NID.
*
* @throws SyntaxError for invalid component or transformations
* that would result in an object in invalid state.
*/
public function withNid(BackedEnum|Stringable|string $nid): self
{
if ($nid instanceof BackedEnum) {
$nid = $nid->value;
}
$nid = (string) $nid;
return $this->nid === $nid ? $this : new self(
nid: $nid,
nss: $this->nss,
rComponent: $this->rComponent,
qComponent: $this->qComponent,
fComponent: $this->fComponent,
);
}
/**
* Return an instance with the specified NSS.
*
* This method MUST retain the state of the current instance, and return
* an instance that contains the specified NSS.
*
* @throws SyntaxError for invalid component or transformations
* that would result in an object in invalid state.
*/
public function withNss(BackedEnum|Stringable|string $nss): self
{
$nss = Encoder::encodePath($nss);
return $this->nss === $nss ? $this : new self(
nid: $this->nid,
nss: $nss,
rComponent: $this->rComponent,
qComponent: $this->qComponent,
fComponent: $this->fComponent,
);
}
/**
* Return an instance with the specified r-component.
*
* This method MUST retain the state of the current instance, and return
* an instance that contains the specified r-component.
*
* The component is removed if the value is null.
*
* @throws SyntaxError for invalid component or transformations
* that would result in an object in invalid state.
*/
public function withRComponent(BackedEnum|Stringable|string|null $component): self
{
if ($component instanceof BackedEnum) {
$component = (string) $component->value;
}
if ($component instanceof UriComponentInterface) {
$component = $component->value();
}
if (null !== $component) {
$component = self::formatComponent(Encoder::encodePath($component));
}
return $this->rComponent === $component ? $this : new self(
nid: $this->nid,
nss: $this->nss,
rComponent: $component,
qComponent: $this->qComponent,
fComponent: $this->fComponent,
);
}
private static function formatComponent(?string $component): ?string
{
return null === $component ? null : str_replace(['?', '#'], ['%3F', '%23'], $component);
}
/**
* Return an instance with the specified q-component.
*
* This method MUST retain the state of the current instance, and return
* an instance that contains the specified q-component.
*
* The component is removed if the value is null.
*
* @throws SyntaxError for invalid component or transformations
* that would result in an object in invalid state.
*/
public function withQComponent(BackedEnum|Stringable|string|null $component): self
{
if ($component instanceof UriComponentInterface) {
$component = $component->value();
}
$component = self::formatComponent(Encoder::encodeQueryOrFragment($component));
return $this->qComponent === $component ? $this : new self(
nid: $this->nid,
nss: $this->nss,
rComponent: $this->rComponent,
qComponent: $component,
fComponent: $this->fComponent,
);
}
/**
* Return an instance with the specified f-component.
*
* This method MUST retain the state of the current instance, and return
* an instance that contains the specified f-component.
*
* The component is removed if the value is null.
*
* @throws SyntaxError for invalid component or transformations
* that would result in an object in invalid state.
*/
public function withFComponent(BackedEnum|Stringable|string|null $component): self
{
if ($component instanceof UriComponentInterface) {
$component = $component->value();
}
$component = self::formatComponent(Encoder::encodeQueryOrFragment($component));
return $this->fComponent === $component ? $this : new self(
nid: $this->nid,
nss: $this->nss,
rComponent: $this->rComponent,
qComponent: $this->qComponent,
fComponent: $component,
);
}
public function normalize(): self
{
$copy = new self(
nid: strtolower($this->nid),
nss: (string) Encoder::normalizePath($this->nss),
rComponent: null === $this->rComponent ? $this->rComponent : Encoder::normalizePath($this->rComponent),
qComponent: Encoder::normalizeQuery($this->qComponent),
fComponent: Encoder::normalizeFragment($this->fComponent),
);
return $copy->uriString === $this->uriString ? $this : $copy;
}
public function equals(Urn|Rfc3986Uri|WhatWgUrl|BackedEnum|Stringable|string $other, UrnComparisonMode $urnComparisonMode = UrnComparisonMode::ExcludeComponents): bool
{
if (!$other instanceof Urn) {
$other = self::parse($other);
}
return (null !== $other) && match ($urnComparisonMode) {
UrnComparisonMode::ExcludeComponents => $other->normalize()->toRfc2141() === $this->normalize()->toRfc2141(),
UrnComparisonMode::IncludeComponents => $other->normalize()->toString() === $this->normalize()->toString(),
};
}
public function when(callable|bool $condition, callable $onSuccess, ?callable $onFail = null): static
{
if (!is_bool($condition)) {
$condition = $condition($this);
}
return match (true) {
$condition => $onSuccess($this),
null !== $onFail => $onFail($this),
default => $this,
} ?? $this;
}
public function transform(callable $callback): static
{
return $callback($this);
}
/**
* @return UrnSerialize
*/
public function __serialize(): array
{
return [['urn' => $this->toString()], []];
}
/**
* @param UrnSerialize $data
*
* @throws SyntaxError
*/
public function __unserialize(array $data): void
{
[$properties] = $data;
$uri = self::fromString($properties['urn'] ?? throw new SyntaxError('The `urn` property is missing from the serialized object.'));
$this->nid = $uri->nid;
$this->nss = $uri->nss;
$this->rComponent = $uri->rComponent;
$this->qComponent = $uri->qComponent;
$this->fComponent = $uri->fComponent;
$this->uriString = $uri->uriString;
}
/**
* @return UrnMap
*/
public function toComponents(): array
{
return [
'scheme' => 'urn',
'nid' => $this->nid,
'nss' => $this->nss,
'r_component' => $this->rComponent,
'q_component' => $this->qComponent,
'f_component' => $this->fComponent,
];
}
/**
* @return UrnMap
*/
public function __debugInfo(): array
{
return $this->toComponents();
}
}