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<?php |
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namespace Flugg\Responder\Traits; |
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/** |
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* Use this trait in your base form request to convert all camel cased parameters to |
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* snake case and boolean strings to PHP booleans when accessing the input from |
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* the controller. |
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* |
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* @package Laravel Responder |
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* @author Alexander Tømmerås <[email protected]> |
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* @license The MIT License |
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*/ |
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trait ConvertsParameters |
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{ |
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/** |
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* Check if an input element is set on the request. |
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* |
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* @param string $key |
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* @return bool |
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*/ |
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public function __isset( $key ) |
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{ |
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return parent::__isset( snake_case( $key ) ); |
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} |
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/** |
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* Get an input element from the request. |
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* |
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* @param string $key |
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* @return mixed |
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*/ |
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public function __get( $key ) |
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{ |
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return parent::__get( snake_case( $key ) ); |
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} |
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/** |
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* Get the validator instance for the request. |
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* |
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* @return \Illuminate\Contracts\Validation\Validator |
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*/ |
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protected function getValidatorInstance() |
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{ |
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$this->getInputSource()->replace( $this->getConvertedParameters() ); |
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return parent::getValidatorInstance(); |
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} |
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/** |
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* Get the input source for the request. |
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* |
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* @return \Symfony\Component\HttpFoundation\ParameterBag |
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*/ |
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abstract protected function getInputSource(); |
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/** |
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* Cast and convert parameters. |
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* |
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* @return array |
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*/ |
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protected function getConvertedParameters():array |
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{ |
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$parameters = $this->all(); |
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$parameters = $this->castBooleans( $parameters ); |
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$parameters = $this->convertToSnakeCase( $parameters ); |
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if ( method_exists( $this, 'convertParameters' ) ) { |
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$parameters = $this->convertParameters( $parameters ); |
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} |
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return $parameters; |
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} |
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/** |
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* Get all of the input and files for the request. |
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* |
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* @return array |
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*/ |
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abstract public function all(); |
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/** |
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* Cast all string booleans to real boolean values. |
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* |
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* @param mixed $input |
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* @return array |
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*/ |
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protected function castBooleans( $input ):array |
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{ |
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if ( isset( $this->castBooleans ) && ! $this->castBooleans ) { |
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return; |
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} |
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$casted = [ ]; |
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foreach ( $input as $key => $value ) { |
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$casted[ $key ] = $this->castValueToBoolean( $value ); |
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} |
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return $casted; |
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} |
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/** |
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* Cast a given value to a boolean if it is in fact a boolean. |
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* |
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* @param mixed $value |
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* @return mixed |
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*/ |
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protected function castValueToBoolean( $value ) |
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{ |
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if ( isset( $this->convertToSnakeCase ) && ! $this->convertToSnakeCase ) { |
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return; |
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} |
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if ( $value === 'true' || $value === 'false' ) { |
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return filter_var( $value, FILTER_VALIDATE_BOOLEAN ); |
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} |
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return $value; |
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} |
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/** |
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* Convert a string or array to snake case. |
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* |
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* @param mixed $input |
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* @return mixed |
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*/ |
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protected function convertToSnakeCase( $input ) |
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{ |
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if ( is_null( $input ) ) { |
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return null; |
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} elseif ( is_array( $input ) ) { |
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return $this->convertArrayToSnakeCase( $input ); |
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} |
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return snake_case( $input ); |
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} |
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/** |
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* Convert all keys of an array to snake case. |
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* |
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* @param array $input |
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* @return array |
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*/ |
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protected function convertArrayToSnakeCase( array $input ):array |
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{ |
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$converted = [ ]; |
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foreach ( $input as $key => $value ) { |
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$converted[ snake_case( $key ) ] = $value; |
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} |
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return $converted; |
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} |
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} |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idable
provides a methodequalsId
that in turn relies on the methodgetId()
. If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()
as an abstract method to the trait will make sure it is available.