doc: Add readme

README.md

@@ -0,0 +1,79 @@
+# JWT
+[![build](https://github.com/b2pweb/jwt/actions/workflows/php.yml/badge.svg)](https://github.com/b2pweb/jwt/actions/workflows/php.yml)
+[![Packagist Version](https://img.shields.io/packagist/v/b2pweb/jwt.svg)](https://packagist.org/packages/b2pweb/jwt)
+[![Total Downloads](https://img.shields.io/packagist/dt/b2pweb/jwt.svg)](https://packagist.org/packages/b2pweb/jwt)
+[![Type Coverage](https://shepherd.dev/github/b2pweb/jwt/coverage.svg)](https://shepherd.dev/github/b2pweb/jwt)
+
+Library for parse and create JWT (JSON Web Token) in PHP, using [PHP JWT Framework](https://github.com/web-token/jwt-framework).
+
+## Installation
+
+Install with composer :
+
+```bash
+composer require b2pweb/jwt
+```
+
+## Simple usage
+
+```php
+<?php
+
+// Define algorithms
+$jwa = new \B2pweb\Jwt\JWA();
+$jwa = $jwa->filter(['HS256', 'HS512', 'RS256', 'RS512']); // Filter enabled algorithms
+
+// Define your keys
+$jwks = new \Jose\Component\Core\JWKSet([
+    \Jose\Component\KeyManagement\JWKFactory::createFromKeyFile($privKey, null, ['use' => 'sig', 'kid' => 'key-user']),
+    // ...
+]);
+
+// Encode a payload to JWT
+$encoder = new \B2pweb\Jwt\JwtEncoder($jwa);
+$jwt = $encoder->encode(
+    [
+        'iss' => 'https://example.com',
+        'aud' => 'https://example.com',
+        'iat' => time(),
+        'exp' => time() + 3600,
+        'sub' => '1234567890',
+        'name' => 'John Doe',
+        'admin' => true,
+    ],
+    // You can configure encoding options here, like the key to use, the algorithm, ...
+    (new \B2pweb\Jwt\EncodingOptions($jwks))
+        ->setAlgorithm('RS512')
+        ->setKid('key-user')
+);
+
+// You can also use an object that implements \B2pweb\Jwt\ClaimsInterface
+// allowing you to customize the claims serialization to JSON
+// If you extends \B2pweb\Jwt\Claims, you can define Claims::$encodingFlags on the subclass to customize the JSON encoding flags
+$claims = new \B2pweb\Jwt\Claims([
+    'iss' => 'https://example.com',
+    'aud' => 'https://example.com',
+    'iat' => time(),
+    'exp' => time() + 3600,
+    'sub' => '1234567890',
+    'name' => 'John Doe',
+    'admin' => true,
+]);
+$jwt = $encoder->encode(
+    $claims,
+    // You can use EncodingOptions::fromKey, which will automatically set the algorithm and the kid from the given key
+    \B2pweb\Jwt\EncodingOptions::fromKey(\Jose\Component\KeyManagement\JWKFactory::createFromSecret($secret, ['use' => 'sig', 'alg' => 'HS256']))
+);
+
+// Decode a JWT
+$decoder = new \B2pweb\Jwt\JwtDecoder($jwa);
+
+$token = $decoder->decode($jwt, $jwks); // Return a \B2pweb\Jwt\Claims object
+$token->claim('iss'); // Return 'https://example.com'
+
+// Yan can also define allowed algorithms using JwtDecoder::supportedAlgorithms()
+$token = $decoder->supportedAlgorithms(['RS256', 'RS512'])->decode($jwt, $jwks);
+
+// You can also decode a JWT without verifying the signature
+$token = \B2pweb\Jwt\JWT::fromJwtUnsafe($jwt);
+```

src/JwtEncoder.php

@@ -60,11 +60,11 @@ public function jwa(): JWA
      */
     public function supportedAlgorithms(array $algorithms): self
     {
-        $decoder = clone $this;
+        $encoder = clone $this;
 
-        $decoder->jwa = $decoder->jwa->filter($algorithms);
+        $encoder->jwa = $encoder->jwa->filter($algorithms);
 
-        return $decoder;
+        return $encoder;
     }
 
     /**