Update code to reach PHPStan max level

src/Concerns/DetectsEndpoints.php

@@ -9,17 +9,15 @@ namespace Cerbero\JsonParser\Concerns;
 trait DetectsEndpoints
 {
     /**
-     * Determine whether the given string points to an endpoint
+     * Determine whether the given value points to an endpoint
      *
-     * @param string $string
+     * @param string $value
      * @return bool
      */
-    public function isEndpoint(string $string): bool
+    public function isEndpoint(string $value): bool
     {
-        if (($url = parse_url($string)) === false) {
-            return false;
-        }
-
-        return isset($url['host']) && in_array($url['scheme'] ?? null, ['http', 'https']);
+        return is_array($url = parse_url($value))
+            && in_array($url['scheme'] ?? null, ['http', 'https'])
+            && isset($url['host']);
     }
 }

src/Config.php

@@ -12,7 +12,7 @@ use Closure;
  * The configuration.
  *
  */
-class Config
+final class Config
 {
     /**
      * The JSON decoder.
@@ -31,7 +31,7 @@ class Config
     /**
      * The number of bytes to read in each chunk.
      *
-     * @var int
+     * @var int<1, max>
      */
     public int $bytes = 1024 * 8;
 

src/Decoders/ConfigurableDecoder.php

@@ -8,14 +8,14 @@ use Cerbero\JsonParser\Config;
  * The configurable decoder.
  *
  */
-class CustomDecoder
+final class ConfigurableDecoder
 {
     /**
      * Instantiate the class.
      *
      * @param Config $config
      */
-    public function __construct(protected Config $config)
+    public function __construct(private Config $config)
     {
     }
 

src/Decoders/DecodedValue.php

@@ -8,14 +8,14 @@ use JsonException;
  * The decoded value.
  *
  */
-class DecodedValue
+final class DecodedValue
 {
     /**
      * Instantiate the class.
      *
      * @param mixed $value
      */
-    protected function __construct(
+    private function __construct(
         public bool $succeeded,
         public mixed $value = null,
         public ?string $error = null,

src/Exceptions/PointerException.php

@@ -6,7 +6,7 @@ namespace Cerbero\JsonParser\Exceptions;
  * The exception thrown when a pointer-related error occurs.
  *
  */
-class PointerException extends JsonParserException
+final class PointerException extends JsonParserException
 {
     /**
      * Retrieve the exception when the given pointer is invalid

src/Exceptions/SourceException.php

@@ -6,7 +6,7 @@ namespace Cerbero\JsonParser\Exceptions;
  * The exception thrown when a source-related error occurs.
  *
  */
-class SourceException extends JsonParserException
+final class SourceException extends JsonParserException
 {
     /**
      * Retrieve the exception when a JSON source is not supported

src/JsonParser.php

@@ -13,22 +13,23 @@ use Traversable;
 /**
  * The JSON parser entry-point.
  *
+ * @implements IteratorAggregate<string|int, mixed>
  */
-class JsonParser implements IteratorAggregate
+final class JsonParser implements IteratorAggregate
 {
     /**
      * The configuration.
      *
      * @var Config
      */
-    protected Config $config;
+    private Config $config;
 
     /**
      * The parser.
      *
      * @var Parser
      */
-    protected Parser $parser;
+    private Parser $parser;
 
     /**
      * Instantiate the class.
@@ -38,7 +39,7 @@ class JsonParser implements IteratorAggregate
     public function __construct(mixed $source)
     {
         $this->config = new Config();
-        $this->parser = Parser::for(AnySource::from($source, $this->config));
+        $this->parser = Parser::for(new AnySource($source, $this->config));
     }
 
     /**
@@ -91,7 +92,7 @@ class JsonParser implements IteratorAggregate
     /**
      * The number of bytes to read in each chunk
      *
-     * @param int $bytes
+     * @param int<1, max> $bytes
      * @return static
      */
     public function bytes(int $bytes): static

src/Lexer.php

@@ -13,43 +13,44 @@ use Traversable;
 /**
  * The JSON lexer.
  *
+ * @implements IteratorAggregate<int, Token>
  */
-class Lexer implements IteratorAggregate
+final class Lexer implements IteratorAggregate
 {
     /**
      * The tokenizer.
      *
      * @var Tokenizer
      */
-    protected Tokenizer $tokenizer;
+    private Tokenizer $tokenizer;
 
     /**
      * The buffer to yield.
      *
      * @var string
      */
-    protected string $buffer = '';
+    private string $buffer = '';
 
     /**
      * Whether the current character is escaped.
      *
      * @var bool
      */
-    protected bool $isEscaping = false;
+    private bool $isEscaping = false;
 
     /**
      * Whether the current character belongs to a string.
      *
      * @var bool
      */
-    protected bool $inString = false;
+    private bool $inString = false;
 
     /**
      * Instantiate the class.
      *
      * @param Source $source
      */
-    public function __construct(protected Source $source)
+    public function __construct(private Source $source)
     {
         $this->tokenizer = new Tokenizer();
     }
@@ -78,7 +79,7 @@ class Lexer implements IteratorAggregate
      * @param string $character
      * @return bool
      */
-    protected function inString(string $character): bool
+    private function inString(string $character): bool
     {
         return ($character == '"' && $this->inString && $this->isEscaping)
             || ($character != '"' && $this->inString)
@@ -91,7 +92,7 @@ class Lexer implements IteratorAggregate
      * @param string $character
      * @return Generator<int, Token>
      */
-    protected function yieldOrBufferCharacter(string $character): Generator
+    private function yieldOrBufferCharacter(string $character): Generator
     {
         if ($this->inString || !isset(Tokens::BOUNDARIES[$character])) {
             $this->buffer .= $character;

src/Parser.php

@@ -2,7 +2,7 @@
 
 namespace Cerbero\JsonParser;
 
-use Cerbero\JsonParser\Decoders\CustomDecoder;
+use Cerbero\JsonParser\Decoders\ConfigurableDecoder;
 use Cerbero\JsonParser\Sources\Source;
 use IteratorAggregate;
 use Traversable;
@@ -10,22 +10,23 @@ use Traversable;
 /**
  * The JSON parser.
  *
+ * @implements IteratorAggregate<string|int, mixed>
  */
-class Parser implements IteratorAggregate
+final class Parser implements IteratorAggregate
 {
     /**
      * The JSON parsing state.
      *
      * @var State
      */
-    protected State $state;
+    private State $state;
 
     /**
      * The decoder handling potential errors.
      *
-     * @var CustomDecoder
+     * @var ConfigurableDecoder
      */
-    protected CustomDecoder $decoder;
+    private ConfigurableDecoder $decoder;
 
     /**
      * Instantiate the class.
@@ -33,10 +34,10 @@ class Parser implements IteratorAggregate
      * @param Lexer $lexer
      * @param Config $config
      */
-    public function __construct(protected Lexer $lexer, protected Config $config)
+    public function __construct(private Lexer $lexer, private Config $config)
     {
         $this->state = new State();
-        $this->decoder = new CustomDecoder($config);
+        $this->decoder = new ConfigurableDecoder($config);
     }
 
     /**

src/Pointers/Pointer.php

@@ -10,21 +10,21 @@ use Stringable;
  * The JSON pointer.
  *
  */
-class Pointer implements Stringable
+final class Pointer implements Stringable
 {
     /**
      * The reference tokens.
      *
      * @var string[]
      */
-    protected array $referenceTokens;
+    private array $referenceTokens;
 
     /**
      * The pointer depth.
      *
      * @var int
      */
-    protected int $depth;
+    private int $depth;
 
     /**
      * Whether the pointer was found.
@@ -38,7 +38,7 @@ class Pointer implements Stringable
      *
      * @param string $pointer
      */
-    public function __construct(protected string $pointer)
+    public function __construct(private string $pointer)
     {
         $this->referenceTokens = $this->toReferenceTokens();
         $this->depth = count($this->referenceTokens);
@@ -49,7 +49,7 @@ class Pointer implements Stringable
      *
      * @return string[]
      */
-    protected function toReferenceTokens(): array
+    private function toReferenceTokens(): array
     {
         if (preg_match('#^(?:/(?:(?:[^/~])|(?:~[01]))*)*$#', $this->pointer) === 0) {
             throw PointerException::invalid($this->pointer);
@@ -85,20 +85,15 @@ class Pointer implements Stringable
      * Determine whether the reference token at the given depth matches the provided key
      *
      * @param int $depth
-     * @param mixed $key
+     * @param string|int $key
      * @return bool
      */
-    public function depthMatchesKey(int $depth, mixed $key): bool
+    public function depthMatchesKey(int $depth, string|int $key): bool
     {
-        if (!isset($this->referenceTokens[$depth])) {
-            return false;
-        }
+        $referenceToken = $this->referenceTokens[$depth] ?? null;
 
-        if ($this->referenceTokens[$depth] === (string) $key) {
-            return true;
-        }
-
-        return is_int($key) && $this->referenceTokens[$depth] === '-';
+        return $referenceToken === (string) $key
+            || (is_int($key) && $referenceToken === '-');
     }
 
     /**
@@ -124,7 +119,7 @@ class Pointer implements Stringable
             return true;
         }
 
-        return (($firstNest = array_search('-', $this->referenceTokens)) !== false)
+        return is_int($firstNest = array_search('-', $this->referenceTokens))
             && array_slice($this->referenceTokens, 0, $firstNest) === array_slice($tree->original(), 0, $firstNest);
     }
 

src/Pointers/Pointers.php

@@ -8,21 +8,21 @@ use Cerbero\JsonParser\Tree;
  * The JSON pointers collection.
  *
  */
-class Pointers
+final class Pointers
 {
     /**
      * The JSON pointers collection.
      *
      * @var Pointer[]
      */
-    protected array $pointers;
+    private array $pointers;
 
     /**
      * The list of pointers that were found within the JSON.
      *
-     * @var array
+     * @var array<string, bool>
      */
-    protected array $found = [];
+    private array $found = [];
 
     /**
      * Instantiate the class.

src/Sources/AnySource.php

@@ -23,18 +23,18 @@ class AnySource extends Source
         Filename::class,
         IterableSource::class,
         Json::class,
+        JsonResource::class,
         LaravelClientResponse::class,
         Psr7Message::class,
         Psr7Stream::class,
-        Resource::class,
     ];
 
     /**
      * The matching source.
      *
-     * @var Source
+     * @var Source|null
      */
-    protected Source $matchingSource;
+    protected ?Source $matchingSource;
 
     /**
      * Retrieve the JSON fragments
@@ -61,7 +61,7 @@ class AnySource extends Source
     protected function sources(): Generator
     {
         foreach ($this->supportedSources as $source) {
-            yield $source::from($this->source, $this->config);
+            yield new $source($this->source, $this->config);
         }
     }
 

src/Sources/CustomSource.php

@@ -7,6 +7,7 @@ use Traversable;
 /**
  * The custom source.
  *
+ * @property-read Source $source
  */
 class CustomSource extends Source
 {

src/Sources/Endpoint.php

@@ -11,6 +11,7 @@ use Traversable;
 /**
  * The endpoint source.
  *
+ * @property-read string $source
  */
 class Endpoint extends Source
 {
@@ -19,9 +20,9 @@ class Endpoint extends Source
     /**
      * The endpoint response.
      *
-     * @var ResponseInterface
+     * @var ResponseInterface|null
      */
-    protected ResponseInterface $response;
+    protected ?ResponseInterface $response;
 
     /**
      * Retrieve the JSON fragments
@@ -41,7 +42,7 @@ class Endpoint extends Source
             ],
         ]);
 
-        return Psr7Message::from($this->response, $this->config);
+        return new Psr7Message($this->response, $this->config);
     }
 
     /**

src/Sources/Filename.php

@@ -7,6 +7,7 @@ use Traversable;
 /**
  * The filename source.
  *
+ * @property-read string $source
  */
 class Filename extends Source
 {
@@ -20,9 +21,9 @@ class Filename extends Source
         $handle = fopen($this->source, 'rb');
 
         try {
-            yield from Resource::from($handle, $this->config);
+            yield from new JsonResource($handle, $this->config);
         } finally {
-            fclose($handle);
+            $handle && fclose($handle);
         }
     }
 

src/Sources/IterableSource.php

@@ -7,6 +7,7 @@ use Traversable;
 /**
  * The iterable source.
  *
+ * @property-read iterable $source
  */
 class IterableSource extends Source
 {
@@ -37,6 +38,6 @@ class IterableSource extends Source
      */
     protected function calculateSize(): ?int
     {
-        return iterator_count(clone $this->source);
+        return is_array($this->source) ? count($this->source) : iterator_count(clone $this->source);
     }
 }

src/Sources/Json.php

@@ -8,6 +8,7 @@ use Traversable;
 /**
  * The JSON source.
  *
+ * @property-read string $source
  */
 class Json extends Source
 {

src/Sources/JsonResource.php

@@ -7,8 +7,9 @@ use Traversable;
 /**
  * The resource source.
  *
+ * @property-read resource $source
  */
-class Resource extends Source
+class JsonResource extends Source
 {
     /**
      * Retrieve the JSON fragments
@@ -18,7 +19,9 @@ class Resource extends Source
     public function getIterator(): Traversable
     {
         while (!feof($this->source)) {
-            yield fread($this->source, $this->config->bytes);
+            if (is_string($chunk = fread($this->source, $this->config->bytes))) {
+                yield $chunk;
+            }
         }
     }
 
@@ -29,7 +32,7 @@ class Resource extends Source
      */
     public function matches(): bool
     {
-        return is_resource($this->source) || get_resource_type($this->source) == 'stream';
+        return is_resource($this->source);
     }
 
     /**

src/Sources/LaravelClientResponse.php

@@ -8,6 +8,7 @@ use Traversable;
 /**
  * The Laravel client response source.
  *
+ * @property-read Response $source
  */
 class LaravelClientResponse extends Source
 {
@@ -18,7 +19,7 @@ class LaravelClientResponse extends Source
      */
     public function getIterator(): Traversable
     {
-        return Psr7Message::from($this->source->toPsrResponse(), $this->config);
+        return new Psr7Message($this->source->toPsrResponse(), $this->config);
     }
 
     /**

src/Sources/Psr7Message.php

@@ -8,6 +8,7 @@ use Traversable;
 /**
  * The PSR-7 message source.
  *
+ * @property-read MessageInterface $source
  */
 class Psr7Message extends Source
 {
@@ -18,7 +19,7 @@ class Psr7Message extends Source
      */
     public function getIterator(): Traversable
     {
-        return Psr7Stream::from($this->source->getBody(), $this->config);
+        return new Psr7Stream($this->source->getBody(), $this->config);
     }
 
     /**

src/Sources/Psr7Stream.php

@@ -8,6 +8,7 @@ use Traversable;
 /**
  * The PSR-7 stream source.
  *
+ * @property-read StreamInterface $source
  */
 class Psr7Stream extends Source
 {
@@ -26,7 +27,7 @@ class Psr7Stream extends Source
             StreamWrapper::NAME => ['stream' => $this->source],
         ]));
 
-        return Resource::from($stream, $this->config);
+        return new JsonResource($stream, $this->config);
     }
 
     /**

src/Sources/Source.php

@@ -9,6 +9,7 @@ use Traversable;
 /**
  * The JSON source.
  *
+ * @implements IteratorAggregate<int, string>
  */
 abstract class Source implements IteratorAggregate
 {
@@ -17,7 +18,7 @@ abstract class Source implements IteratorAggregate
      *
      * @var int|null
      */
-    protected int $size;
+    protected ?int $size;
 
     /**
      * Retrieve the JSON fragments
@@ -46,22 +47,10 @@ abstract class Source implements IteratorAggregate
      * @param mixed $source
      * @param Config $config
      */
-    protected function __construct(protected mixed $source, protected Config $config)
+    final public function __construct(protected mixed $source, protected Config $config)
     {
     }
 
-    /**
-     * Instantiate the class statically
-     *
-     * @param mixed $source
-     * @param Config $config
-     * @return static
-     */
-    public static function from(mixed $source, Config $config): static
-    {
-        return new static($source, $config);
-    }
-
     /**
      * Retrieve the underlying configuration
      *

src/Sources/StreamWrapper.php

@@ -9,7 +9,7 @@ use Psr\Http\Message\StreamInterface;
  *
  * @phpcs:disable PSR1.Methods.CamelCapsMethodName.NotCamelCaps
  */
-class StreamWrapper
+final class StreamWrapper
 {
     /**
      * The name of the stream wrapper.
@@ -23,14 +23,14 @@ class StreamWrapper
      *
      * @var resource
      */
-    public $context;
+    public mixed $context;
 
     /**
      * The PSR-7 stream.
      *
      * @var StreamInterface
      */
-    protected $stream;
+    private $stream;
 
     /**
      * Open the stream

src/State.php

@@ -10,35 +10,35 @@ use Cerbero\JsonParser\Tokens\Token;
  * The JSON parsing state.
  *
  */
-class State
+final class State
 {
     /**
      * The JSON tree.
      *
      * @var Tree
      */
-    protected Tree $tree;
+    private Tree $tree;
 
     /**
      * The JSON pointers.
      *
      * @var Pointers
      */
-    protected Pointers $pointers;
+    private Pointers $pointers;
 
     /**
      * The JSON pointer matching the tree.
      *
      * @var Pointer
      */
-    protected Pointer $pointer;
+    private Pointer $pointer;
 
     /**
      * The JSON buffer.
      *
      * @var string
      */
-    protected string $buffer = '';
+    private string $buffer = '';
 
     /**
      * Whether an object key is expected.
@@ -81,9 +81,9 @@ class State
     /**
      * Retrieve the current key of the JSON tree
      *
-     * @return string
+     * @return string|int
      */
-    public function key(): string
+    public function key(): string|int
     {
         return $this->tree->currentKey();
     }
@@ -160,7 +160,7 @@ class State
      * @param Token $token
      * @return void
      */
-    protected function bufferToken(Token $token): void
+    private function bufferToken(Token $token): void
     {
         $shouldBuffer = $this->tree->depth() >= 0
             && $this->pointer->matchesTree($this->tree)

src/Tokens/Comma.php

@@ -8,7 +8,7 @@ use Cerbero\JsonParser\State;
  * The comma token.
  *
  */
-class Comma extends Token
+final class Comma extends Token
 {
     /**
      * Retrieve the token type
@@ -28,8 +28,6 @@ class Comma extends Token
      */
     public function mutateState(State $state): void
     {
-        if ($state->inObject()) {
-            $state->expectsKey = true;
-        }
+        $state->expectsKey = $state->inObject();
     }
 }

src/Tokens/CompoundBegin.php

@@ -8,7 +8,7 @@ use Cerbero\JsonParser\State;
  * The token that begins compound data (JSON arrays or objects).
  *
  */
-class CompoundBegin extends Token
+final class CompoundBegin extends Token
 {
     /**
      * Retrieve the token type
@@ -30,8 +30,6 @@ class CompoundBegin extends Token
     {
         $state->tree()->deepen();
 
-        if ($this->value == '{') {
-            $state->expectsKey = true;
-        }
+        $state->expectsKey = $this->value == '{';
     }
 }

src/Tokens/CompoundEnd.php

@@ -8,7 +8,7 @@ use Cerbero\JsonParser\State;
  * The token that ends compound data (JSON arrays or objects).
  *
  */
-class CompoundEnd extends Token
+final class CompoundEnd extends Token
 {
     /**
      * Retrieve the token type
@@ -29,10 +29,6 @@ class CompoundEnd extends Token
     public function mutateState(State $state): void
     {
         $state->tree()->emerge();
-
-        if ($this->value == '}') {
-            $state->expectsKey = false;
-        }
     }
 
     /**

src/Tokens/Constant.php

@@ -6,7 +6,7 @@ namespace Cerbero\JsonParser\Tokens;
  * The constant token, includes colons for convenience.
  *
  */
-class Constant extends Token
+final class Constant extends Token
 {
     /**
      * Retrieve the token type

src/Tokens/ScalarString.php

@@ -8,14 +8,14 @@ use Cerbero\JsonParser\State;
  * The scalar string token.
  *
  */
-class ScalarString extends Token
+final class ScalarString extends Token
 {
     /**
      * Whether this token is an object key.
      *
      * @var bool
      */
-    protected bool $isKey = false;
+    private bool $isKey = false;
 
     /**
      * Retrieve the token type

src/Tokens/Tokenizer.php

@@ -6,14 +6,14 @@ namespace Cerbero\JsonParser\Tokens;
  * The tokenizer.
  *
  */
-class Tokenizer
+final class Tokenizer
 {
     /**
      * The map of token instances by type.
      *
      * @var array<int, Token>
      */
-    protected static array $tokensMap;
+    private static array $tokensMap;
 
     /**
      * Instantiate the class.
@@ -29,7 +29,7 @@ class Tokenizer
      *
      * @return array<int, Token>
      */
-    protected function hydrateTokensMap(): array
+    private function hydrateTokensMap(): array
     {
         $map = $instances = [];
 

src/Tokens/Tokens.php

@@ -6,7 +6,7 @@ namespace Cerbero\JsonParser\Tokens;
  * The tokens related information.
  *
  */
-class Tokens
+final class Tokens
 {
     public const SCALAR_CONST = 1 << 0;
     public const SCALAR_STRING = 1 << 1;
@@ -35,7 +35,7 @@ class Tokens
     /**
      * The token types.
      *
-     * @var array
+     * @var array<string|int, int>
      */
     public const TYPES = [
         'n' => self::SCALAR_CONST,
@@ -64,7 +64,7 @@ class Tokens
     /**
      * The token boundaries.
      *
-     * @var array
+     * @var array<string, bool>
      */
     public const BOUNDARIES = [
         "\xEF" => true,
@@ -85,7 +85,7 @@ class Tokens
     /**
      * The structural boundaries.
      *
-     * @var array
+     * @var array<string, bool>
      */
     public const DELIMITERS = [
         '{' => true,

src/Tree.php

@@ -2,34 +2,32 @@
 
 namespace Cerbero\JsonParser;
 
-use Cerbero\JsonParser\Pointers\Pointer;
-
 /**
  * The JSON tree.
  *
  */
-class Tree
+final class Tree
 {
     /**
      * The original JSON tree.
      *
      * @var array<int, string|int>
      */
-    protected array $original = [];
+    private array $original = [];
 
     /**
      * The wildcarded JSON tree.
      *
      * @var array<int, string|int>
      */
-    protected array $wildcarded = [];
+    private array $wildcarded = [];
 
     /**
      * The JSON tree depth.
      *
      * @var int
      */
-    protected int $depth = -1;
+    private int $depth = -1;
 
     /**
      * Retrieve the original JSON tree
@@ -102,7 +100,7 @@ class Tree
      *
      * @return void
      */
-    protected function trim(): void
+    private function trim(): void
     {
         array_splice($this->original, $this->depth + 1);
         array_splice($this->wildcarded, $this->depth + 1);