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<?php |
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namespace Koch\Filters; |
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use Illuminate\Http\Request; |
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use Koch\Filters\Behavior\Orderable; |
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use Koch\Filters\Behavior\Searchable; |
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use Illuminate\Database\Eloquent\Builder; |
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use Koch\Filters\Contracts\Filter as FilterContract; |
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abstract class Filter implements FilterContract |
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{ |
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use Searchable, Orderable; |
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/** |
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* Already loaded relations. |
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* |
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* @var array |
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*/ |
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protected $loaded = []; |
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/** |
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* Default searchable columns. |
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* |
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* @var array |
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*/ |
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protected $searchable = ['name']; |
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/** |
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* Default orderable columns. |
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* |
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* @var array |
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*/ |
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protected $orderable = ['name' => 'name']; |
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/** |
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* Request data. |
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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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* Builder instance. |
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* |
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* @var \Illuminate\Database\Eloquent\Builder |
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*/ |
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protected $builder; |
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/** |
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* Class constructor. |
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* |
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* @return void |
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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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* Applies all available filters. |
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* |
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* @param \Illuminate\Database\Eloquent\Builder $builder |
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* @return \Illuminate\Database\Eloquent\Builder |
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*/ |
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public function apply(Builder $builder) |
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{ |
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$this->builder = $builder; |
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// We need to select all columns from the original |
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// table, since many joins can mess up the selected fields |
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$this->builder->select("{$this->getTableName()}.*"); |
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foreach ($this->filters() as $name => $value) { |
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$this->callFilterMethod($name, $value); |
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} |
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return $this->builder; |
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} |
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/** |
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* Returns all filters from the request. |
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* |
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* @return array |
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*/ |
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public function filters() |
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{ |
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return $this->request->all(); |
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} |
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/** |
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* Helper function to call each filter method. |
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* |
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* @param string $name |
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* @param string $value |
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*/ |
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protected function callFilterMethod($name, $value) |
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{ |
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call_user_func_array([$this, $name], array_filter([$value])); |
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} |
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/** |
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* Returns the associated table name. |
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* |
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* @return string |
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*/ |
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protected function getTableName() |
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{ |
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return $this->builder->getModel()->getTable(); |
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} |
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/** |
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* Recursively build up the query. |
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* |
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* @param string $column |
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* @param string $key |
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* @param string $last |
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* @param callable $callback |
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* @return void |
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*/ |
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protected function resolve($column, $key, $last, callable $callback) |
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{ |
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if (! strpos($column, '.')) { |
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return $callback("{$last}.{$column}", $key); |
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} |
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$scope = strstr($column, '.', true); |
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$singular = str_singular($scope); |
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$next = substr(strstr($column, '.'), 1); |
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if (! in_array($scope, $this->loaded)) { |
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$this->loaded[] = $scope; |
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$this->builder->join($scope, "{$last}.{$singular}_id", "{$scope}.id"); |
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} |
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return $this->resolve($next, $key, $scope, $callback); |
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} |
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} |
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Adding a
@returnannotation to a constructor is not recommended, since a constructor does not have a meaningful return value.Please refer to the PHP core documentation on constructors.