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<?php |
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declare(strict_types=1); |
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namespace MarcinOrlowski\ResponseBuilder; |
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/** |
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* Laravel API Response Builder |
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* |
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* @package MarcinOrlowski\ResponseBuilder |
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* |
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* @author Marcin Orlowski <mail (#) marcinorlowski (.) com> |
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* @copyright 2016-2019 Marcin Orlowski |
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* @license http://www.opensource.org/licenses/mit-license.php MIT |
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* @link https://github.com/MarcinOrlowski/laravel-api-response-builder |
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*/ |
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use Illuminate\Support\Facades\Config; |
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/** |
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* Data converter |
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*/ |
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class Converter |
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{ |
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/** |
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* @var array|null |
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*/ |
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protected $classes; |
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public function __construct() |
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{ |
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$classes = Config::get(ResponseBuilder::CONF_KEY_CLASSES) ?? []; |
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if (!is_array($classes)) { |
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throw new \RuntimeException( |
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sprintf('CONFIG: "classes" mapping must be an array (%s given)', gettype($classes))); |
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} |
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$this->classes = $classes; |
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} |
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public function getClasses(): array |
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{ |
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return $this->classes; |
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} |
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/** |
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* Checks if we have "classes" mapping configured for $data object class. |
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* Returns @true if there's valid config for this class. |
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* |
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* @param object $data Object to check mapping for. |
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* |
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* @return array |
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* |
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* @throws \RuntimeException if there's no config "classes" mapping entry |
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* for this object configured. |
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*/ |
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protected function getClassMappingConfigOrThrow(object $data): array |
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{ |
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$result = null; |
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// check for exact class name match... |
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$cls = get_class($data); |
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if (array_key_exists($cls, $this->classes)) { |
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$result = $this->classes[ $cls ]; |
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} else { |
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// no exact match, then lets try with `instanceof` |
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foreach ($this->classes as $class_name => $params) { |
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if ($data instanceof $class_name) { |
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$result = $this->classes[ $class_name ]; |
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break; |
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} |
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} |
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} |
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if ($result === null) { |
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throw new \InvalidArgumentException(sprintf('No data conversion mapping configured for "%s" class.', $cls)); |
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} |
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return $result; |
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} |
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/** |
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* We need to prepare source data |
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* |
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* @param null $data |
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* |
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* @return array|null |
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*/ |
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public function convert($data = null): ?array |
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{ |
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if ($data === null) { |
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return null; |
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} |
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if (is_object($data)) { |
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$cfg = $this->getClassMappingConfigOrThrow($data); |
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$data = [$cfg[ ResponseBuilder::KEY_KEY ] => $data->{$cfg[ ResponseBuilder::KEY_METHOD ]}()]; |
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} elseif (!is_array($data)) { |
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throw new \InvalidArgumentException( |
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sprintf('Invalid payload data. Must be null, array or object with mapping ("%s" given).', gettype($data))); |
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} |
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return $this->convertArray($data); |
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} |
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/** |
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* Recursively walks $data array and converts all known objects if found. Note |
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* $data array is passed by reference so source $data array may be modified. |
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* |
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* @param array $data array to recursively convert known elements of |
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* |
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* @return array |
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*/ |
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protected function convertArray(array $data): array |
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{ |
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// This is to ensure that we either have array with user provided keys i.e. ['foo'=>'bar'], which will then |
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// be turned into JSON object or array without user specified keys (['bar']) which we would return as JSON |
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// array. But you can't mix these two as the final JSON would not produce predictable results. |
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$string_keys_cnt = 0; |
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$int_keys_cnt = 0; |
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foreach ($data as $key => $val) { |
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if (is_int($key)) { |
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$int_keys_cnt++; |
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} else { |
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$string_keys_cnt++; |
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} |
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if (($string_keys_cnt > 0) && ($int_keys_cnt > 0)) { |
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throw new \RuntimeException( |
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'Invalid data array. Either set own keys for all the items or do not specify any keys at all. ' . |
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'Arrays with mixed keys are not supported by design.'); |
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} |
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} |
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foreach ($data as $key => $val) { |
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if (is_array($val)) { |
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$data[ $key ] = $this->convertArray($val); |
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} elseif (is_object($val)) { |
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$cls = get_class($val); |
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$cfg = $this->getClassMappingConfigOrThrow($val); |
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if (array_key_exists($cls, $this->classes)) { |
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$conversion_method = $this->classes[ $cls ][ ResponseBuilder::KEY_METHOD ]; |
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$converted_data = $val->$conversion_method(); |
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// $data = [$this->classes[ $cls ][ ResponseBuilder::KEY_KEY ] => $converted_data]; |
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$data[ $key ] = $converted_data; |
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} |
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} |
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} |
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return $data; |
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} |
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} |
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MarcinOrlowski /
laravel-api-response-builder
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