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<?php |
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namespace Cerbero\JsonObjects; |
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use Exception; |
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use JsonStreamingParser\Parser; |
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use Cerbero\JsonObjects\Listeners\AbstractListener; |
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use Cerbero\JsonObjects\Listeners\ChunkListener; |
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use Cerbero\JsonObjects\Listeners\ObjectListener; |
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/** |
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* The JSON objects main class. |
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* |
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*/ |
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class JsonObjects |
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{ |
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/** |
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* The JSON stream. |
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* |
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* @var resource |
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*/ |
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protected $stream; |
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/** |
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* The key containing the JSON objects. |
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* |
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* @var string|null |
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*/ |
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protected $key; |
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/** |
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* Set the dependencies. |
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* |
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* @param resource|string $source |
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* @param string|null $key |
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* |
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* @throws JsonObjectsException |
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*/ |
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public function __construct($source, string $key = null) |
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{ |
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$this->setStreamFromSource($source); |
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$this->key = $key; |
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} |
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/** |
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* Set the JSON stream from the given source |
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* |
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* @param mixed $source |
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* @return void |
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* |
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* @throws JsonObjectsException |
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*/ |
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protected function setStreamFromSource($source) : void |
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{ |
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if (is_resource($source)) { |
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$this->stream = $source; |
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return; |
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} |
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if (!is_string($source)) { |
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throw new JsonObjectsException('Unable to create a stream from the given source.'); |
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} |
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$stream = extension_loaded('zlib') ? @gzopen($source, 'rb') : @fopen($source, 'rb'); |
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if ($stream === false) { |
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throw new JsonObjectsException("Failed to open stream from: {$source}"); |
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} |
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$this->stream = $stream; |
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} |
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/** |
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* Create a new instance while easing method chaining |
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* |
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* @param resource|string $source |
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* @param string|null $key |
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* @return self |
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* |
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* @throws JsonObjectsException |
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*/ |
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public static function from($source, string $key = null) : self |
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{ |
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return new static($source, $key); |
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} |
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/** |
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* Process each JSON object separately |
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* |
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* @param callable $callback |
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* @return void |
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* |
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* @throws JsonObjectsException |
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*/ |
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public function each(callable $callback) : void |
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{ |
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$this->parseStreamWithListener(new ObjectListener($callback)); |
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} |
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/** |
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* Parse the JSON stream with the given listener |
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* |
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* @param AbstractListener $listener |
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* @return void |
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* |
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* @throws JsonObjectsException |
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*/ |
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protected function parseStreamWithListener(AbstractListener $listener) : void |
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{ |
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if ($this->key !== null) { |
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$listener->setTargetFromKey($this->key); |
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} |
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try { |
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(new Parser($this->stream, $listener))->parse(); |
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} catch (Exception $e) { |
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throw new JsonObjectsException($e->getMessage()); |
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} finally { |
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extension_loaded('zlib') ? gzclose($this->stream) : fclose($this->stream); |
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} |
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} |
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/** |
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* Process JSON objects in chunks |
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* |
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* @param int $size |
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* @param callable $callback |
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* @return void |
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* |
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* @throws JsonObjectsException |
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*/ |
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9 |
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public function chunk(int $size, callable $callback) : void |
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{ |
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9 |
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$this->parseStreamWithListener(new ChunkListener($size, $callback)); |
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} |
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} |
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cerbero90 /
json-objects
