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<?php |
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namespace JamesMoss\Flywheel; |
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/** |
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* Query |
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* |
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* Builds an executes a query whichs searches and sorts documents from a |
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* repository. |
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*/ |
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class Predicate |
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{ |
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const LOGICAL_AND = 'and'; |
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const LOGICAL_OR = 'or'; |
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protected $predicates = array(); |
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protected $operators = array( |
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'>', '>=', '<', '<=', '==', '===', '!=', '!==', |
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); |
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public function getAll() |
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{ |
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return $this->predicates; |
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} |
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public function where($field, $operator = null, $value = null) |
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{ |
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return $this->andWhere($field, $operator, $value); |
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} |
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public function andWhere($field, $operator = null, $value = null) |
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{ |
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$this->addPredicate(self::LOGICAL_AND, $field, $operator, $value); |
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return $this; |
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} |
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public function orWhere($field, $operator = null, $value = null) |
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{ |
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$this->addPredicate(self::LOGICAL_OR, $field, $operator, $value); |
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return $this; |
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} |
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protected function addPredicate($type, $field, $operator = null, $value = null) |
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{ |
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if (!$this->predicates) { |
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$type = false; |
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} |
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if ($field instanceof \Closure) { |
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$sub = new self(); |
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call_user_func($field, $sub); |
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$this->predicates[] = array($type, $sub->getAll()); |
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return $this; |
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} |
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$field = trim($field); |
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if ($field == '') { |
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throw new \InvalidArgumentException('Field name cannot be empty.'); |
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} |
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if (!in_array($operator, $this->operators)) { |
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throw new \InvalidArgumentException('Unknown operator `'.$operator.'`.'); |
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} |
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$this->predicates[] = array($type, $field, $operator, $value); |
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return $this; |
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} |
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} |
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jamesmoss /
flywheel
This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent.
Consider making the comparison explicit by using
empty(..)or! empty(...)instead.