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<?php |
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namespace Alchemy\Phraseanet\Predicate; |
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class PredicateBuilder |
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{ |
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/** |
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* @var \SplStack |
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*/ |
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private $predicateStack; |
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public function __construct() |
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{ |
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$this->predicateStack = new \SplStack(); |
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$this->predicateStack->push(new AndPredicate(new NullPredicate())); |
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} |
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public function where($expression) |
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{ |
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if (! $expression instanceof Predicate) { |
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$expression = new LiteralPredicate($expression); |
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} |
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$this->predicateStack = new \SplStack(); |
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$this->predicateStack->push(new AndPredicate($expression)); |
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return $this; |
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} |
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public function andWhere($expression) |
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{ |
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if (! $expression instanceof Predicate) { |
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$expression = new LiteralPredicate($expression); |
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} |
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if ($this->predicateStack->count() > 1 && ! $this->predicateStack->top() instanceof AndPredicate) { |
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$this->startAndGroup(); |
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} |
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$predicate = $this->predicateStack->pop()->andPredicate($expression); |
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$this->predicateStack->push($predicate); |
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return $this; |
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} |
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public function orWhere($expression) |
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{ |
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if (! $expression instanceof Predicate) { |
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$expression = new LiteralPredicate($expression); |
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} |
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if ($this->predicateStack->count() > 1 && ! $this->predicateStack->top() instanceof OrPredicate) { |
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$this->startOrGroup(); |
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} |
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$predicate = $this->predicateStack->pop()->orPredicate($expression); |
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$this->predicateStack->push($predicate); |
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return $this; |
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} |
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public function startAndGroup() |
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{ |
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$predicate = new AndPredicate(new NullPredicate()); |
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$this->predicateStack->top()->pushPredicate($predicate); |
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$this->predicateStack->push($predicate); |
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return $this; |
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} |
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public function startOrGroup() |
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{ |
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$predicate = new OrPredicate(new NullPredicate()); |
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$this->predicateStack->top()->pushPredicate($predicate); |
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$this->predicateStack->push($predicate); |
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return $this; |
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} |
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public function endGroup() |
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{ |
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if ($this->predicateStack->count() <= 1) { |
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throw new \BadMethodCallException('Invalid operation: Not in a condition group.'); |
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} |
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$this->predicateStack->pop(); |
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return $this; |
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} |
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public function endAllGroups() |
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{ |
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while ($this->predicateStack->count() > 1) { |
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$this->endGroup(); |
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} |
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} |
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public function getPredicate() |
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{ |
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$predicate = $this->predicateStack->bottom() |
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->pruneInstancesOf(NullPredicate::class, true) |
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->pruneRedundantComposites(true); |
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if ($predicate instanceof CompositePredicate) { |
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$predicate = $predicate->pruneInstancesOf(NullPredicate::class, true); |
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} |
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return $predicate; |
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} |
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} |
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alchemy-fr /
phraseanet-bundle
