README

This project provides a composer package with an abstraction of a JSON pointer.

Installation

Run

composer require ergebnis/json-pointer

Usage

ReferenceToken

You can create a ReferenceToken from a string value:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$referenceToken = Pointer\ReferenceToken::fromString('foo/9000/😆');

$referenceToken->toJsonString();                  // 'foo~19000~😆'
$referenceToken->toString();                      // 'foo/9000/😆'
$referenceToken->toUriFragmentIdentifierString(); // 'foo~19000~1%F0%9F%98%86'

You can create a ReferenceToken from a JSON string value:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$referenceToken = Pointer\ReferenceToken::fromJsonString('foo~19000~😆');

$referenceToken->toJsonString();                  // 'foo~19000~😆'
$referenceToken->toString();                      // 'foo/9000/😆'
$referenceToken->toUriFragmentIdentifierString(); // 'foo~19000~1%F0%9F%98%86'

You can create a ReferenceToken from a URI fragment identifier string value:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$referenceToken = Pointer\ReferenceToken::fromUriFragmentIdentifierString('foo~19000~1%F0%9F%98%86');

$referenceToken->toJsonString();                  // 'foo~19000~😆'
$referenceToken->toString();                      // 'foo/9000/😆'
$referenceToken->toUriFragmentIdentifierString(); // 'foo~19000~1%F0%9F%98%86'

You can create a ReferenceToken from an int value:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$referenceToken = Pointer\ReferenceToken::fromInt(9001);

$referenceToken->toJsonString();                  // '9001'
$referenceToken->toString();                      // '9001'
$referenceToken->toUriFragmentIdentifierString(); // '9001'

You can compare ReferenceTokens:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$one = Pointer\ReferenceToken::fromString('foo/bar');
$two = Pointer\ReferenceToken::fromJsonString('foo~1bar');
$three = Pointer\ReferenceToken::fromString('foo/9000');

$one->equals($two);   // true
$one->equals($three); // false

JsonPointer

You can create a JsonPointer referencing a document:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$jsonPointer = Pointer\JsonPointer::document();

$jsonPointer->toJsonString();                  // ''
$jsonPointer->toUriFragmentIdentifierString(); // '#'

You can create a JsonPointer from a JSON string representation value:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$jsonPointer = Pointer\JsonPointer::fromJsonString('/foo/bar/😆');

$jsonPointer->toJsonString();                  // '/foo/bar/😆'
$jsonPointer->toUriFragmentIdentifierString(); // '#/foo/bar/%F0%9F%98%86'

You can create a JsonPointer from a URI fragment identifier string representation value:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$jsonPointer = Pointer\JsonPointer::fromUriFragmentIdentifierString('#/foo/bar/%F0%9F%98%86');

$jsonPointer->toJsonString();                  // '/foo/bar/😆'
$jsonPointer->toUriFragmentIdentifierString(); // '#/foo/bar/%F0%9F%98%86'

You can create a JsonPointer from ReferenceTokens:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$referenceTokens = [
    Pointer\ReferenceToken::fromString('foo'),
    Pointer\ReferenceToken::fromString('bar'),
];

$jsonPointer = Pointer\JsonPointer::fromReferenceTokens(...$referenceTokens);

$jsonPointer->toJsonString();                  // '/foo/bar'
$jsonPointer->toUriFragmentIdentifierString(); // '#/foo/bar'

You can compare JsonPointers:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$one = Pointer\JsonPointer::fromJsonString('/foo/bar');
$two = Pointer\JsonPointer::fromJsonString('/foo~1bar');
$three = Pointer\JsonPointer::fromUriFragmentIdentifierString('#/foo/bar');

$one->equals($two);   // false
$one->equals($three); // true

You can append a ReferenceToken to a JsonPointer:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$jsonPointer = Pointer\JsonPointer::fromJsonString('/foo/bar');

$referenceToken = Pointer\ReferenceToken::fromString('baz');

$newJsonPointer = $jsonPointer->append($referenceToken);

$newJsonPointer->toJsonString();                  // '/foo/bar/baz'
$newJsonPointer->toUriFragmentIdentifierString(); // '#foo/bar/baz'

Specification

You can create a Specification that is always satisfied by a JsonPointer:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$specification = Pointer\Specification::always();

$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo'));     // true
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/bar')); // true

You can create a Specification that is satisfied when a closure returns true for a JsonPointer:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$specification = Pointer\Specification::closure(static function (Pointer\JsonPointer $jsonPointer) {
    return $jsonPointer->toJsonString() === '/foo/bar';
});

$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo'));     // false
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/bar')); // true

You can create a Specification that is satisfied when a JsonPointer equals another JsonPointer:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$specification = Pointer\Specification::equals(Pointer\JsonPointer::fromJsonString('/foo/bar'));

$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo'));     // false
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/bar')); // true

You can create a Specification that is never satisfied by a JsonPointer:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$specification = Pointer\Specification::never();

$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo'));     // false
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/bar')); // false

You can create a Specification that is satisfied when another Specification is not satisfied by a JsonPointer:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$specification = Pointer\Specification::not(Pointer\Specification::equals(Pointer\JsonPointer::fromJsonString('/foo/bar')));

$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo'));     // true
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/bar')); // false

You can compose Specifications to find out if a JsonPointer satisfies any of them:

<?php

declare(strict_types=1);

use Ergebnis\Json\Pointer;

$specification = Pointer\Specification::anyOf(
    Pointer\Specification::closure(static function(Pointer\JsonPointer $jsonPointer) {
        return $jsonPointer->toJsonString() === '/foo/bar';
    }),
    Pointer\Specification::equals(Pointer\JsonPointer::fromJsonString('/foo/baz')),
    Pointer\Specification::never(),
);

$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo'));     // false
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/bar')); // true
$specification->isSatisfiedBy(Pointer\JsonPointer::fromJsonString('/foo/baz')); // true

Changelog

The maintainers of this project record notable changes to this project in a changelog.

Contributing

The maintainers of this project suggest following the contribution guide.

Code of Conduct

The maintainers of this project ask contributors to follow the code of conduct.

General Support Policy

The maintainers of this project provide limited support.

You can support the maintenance of this project by sponsoring @ergebnis.

PHP Version Support Policy

This project supports PHP versions with active and security support.

The maintainers of this project add support for a PHP version following its initial release and drop support for a PHP version when it has reached the end of security support.

Security Policy

This project has a security policy.

License

This project uses the MIT license.

Social

Follow @localheinz and @ergebnis on Twitter.