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<?php |
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namespace Kaliop\eZMigrationBundle\Core\ReferenceResolver; |
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use Kaliop\eZMigrationBundle\API\EnumerableReferenceResolverInterface; |
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class LoopResolver extends AbstractResolver implements EnumerableReferenceResolverInterface |
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{ |
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protected $referencePrefixes = array('loop:'); |
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protected $stack = array(); |
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1 |
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public function beginLoop() |
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{ |
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$this->stack[] = array('step' => 0, 'key' => null, 'value' => null); |
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} |
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public function endLoop() |
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{ |
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array_pop($this->stack); |
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} |
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public function loopStep($key = null, $value = null) |
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{ |
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$idx = count($this->stack) - 1; |
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$this->stack[$idx]['step'] = $this->stack[$idx]['step'] + 1; |
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$this->stack[$idx]['key'] = $key; |
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$this->stack[$idx]['value'] = $value; |
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} |
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/** |
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* @param string $identifier format: 'loop:iteration', 'loop:depth', 'loop:key', 'loop:value' |
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* @return int |
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* @throws \Exception When trying to retrieve anything else but index and depth |
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*/ |
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public function getReferenceValue($identifier) |
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{ |
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switch(substr($identifier, 5)) { |
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case 'iteration': |
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$current = end($this->stack); |
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return $current['step']; |
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case 'key': |
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$current = end($this->stack); |
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return $current['key']; |
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case 'value': |
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$current = end($this->stack); |
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return $current['value']; |
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case 'depth': |
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return count($this->stack); |
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default: |
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throw new \Exception("Can not resolve loop value '$identifier'"); |
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} |
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} |
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/** |
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* We implement this method (interface) purely for convenience, as it allows this resolver to be added to the |
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* 'custom-reference-resolver' chain and not break migration suspend/resume |
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* @return array |
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*/ |
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public function listReferences() |
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{ |
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return array(); |
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} |
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} |
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kaliop-uk /
ezmigrationbundle
