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<?php |
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namespace Cerbero\QueryFilters; |
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use Illuminate\Database\Eloquent\Builder; |
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use Illuminate\Http\Request; |
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use Illuminate\Support\Str; |
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use ReflectionMethod; |
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/** |
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* Abstract implementation of a query filters class. |
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* |
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*/ |
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abstract class QueryFilters |
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{ |
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/** |
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* The HTTP request with query parameters. |
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* |
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* @var \Illuminate\Http\Request |
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*/ |
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protected $request; |
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/** |
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* The Eloquent query builder. |
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* |
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* @var \Illuminate\Database\Eloquent\Builder |
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*/ |
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protected $query; |
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/** |
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* Set the dependencies. |
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* |
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* @param \Illuminate\Http\Request $request |
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*/ |
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public function __construct(Request $request) |
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{ |
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$this->request = $request; |
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} |
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/** |
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* Retrieve the request that query filters are based on |
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* |
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* @return \Illuminate\Http\Request |
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*/ |
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public function getRequest() |
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{ |
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return $this->request; |
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} |
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/** |
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* Hydrate query filters from a plain array. |
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* |
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* @param array $queries |
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* @return static |
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*/ |
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public static function hydrate(array $queries) |
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{ |
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$request = new Request($queries); |
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return new static($request); |
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} |
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/** |
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* Apply filters based on query parameters. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $query |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function applyToQuery(Builder $query) |
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{ |
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$this->query = $query; |
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foreach ($this->request->all() as $filter => $value) { |
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$method = Str::camel($filter); |
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if ($this->filterCanBeApplied($method, $value)) { |
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call_user_func([$this, $method], $value); |
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} |
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} |
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return $query; |
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} |
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/** |
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* Determine whether the given filter can be applied with the provided value. |
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* |
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* @param string $filter |
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* @param mixed $value |
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* @return boolean |
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*/ |
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protected function filterCanBeApplied($filter, $value) |
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{ |
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// do not apply query filters that haven't been implemented |
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if (!method_exists($this, $filter)) { |
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return false; |
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} |
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// apply query filters with valid values |
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if ($value !== '' && $value !== null) { |
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return true; |
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} |
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// apply query filters that don't need values (implicit filters) |
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return (new ReflectionMethod($this, $filter))->getNumberOfParameters() === 0; |
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} |
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} |
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cerbero90 /
query-filters
