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<?php |
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namespace micmania1\config\MergeStrategy; |
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use micmania1\config\ConfigCollectionInterface; |
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use micmania1\config\ConfigCollection; |
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class Priority |
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{ |
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public function merge(array $mine, ConfigCollectionInterface $theirs) { |
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foreach ($mine as $key => $item) { |
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// Ensure we have value/metadata keys |
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$item = $this->normaliseItem($item); |
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// If the item doesn't exist in theirs, we can just set it and continue. |
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$theirValue = $theirs->get($key); |
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if(is_null($theirValue)) { |
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$theirs->set($key, $item['value']); |
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continue; |
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} |
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// Get the two values for comparison |
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$value = $item['value']; |
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// If its an array and the key already esists, we can use array_merge |
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if (is_array($value) && is_array($theirValue)) { |
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$value = $this->mergeArray($value, $theirValue); |
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} |
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// The key is not set or the value is to be overwritten |
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$theirs->set($key, $value, $item['metadata']); |
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} |
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return $theirs; |
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} |
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/** |
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* Deep merges a high priorty array into a lower priority array, overwriting duplicate |
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* keys. If the keys are integers, then the merges acts like array_merge() and adds a new |
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* item. |
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* |
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* @param array $highPriority |
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* @param array $lowPriority |
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* |
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* @return array |
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*/ |
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public function mergeArray(array $highPriority, array $lowPriority) |
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{ |
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foreach($highPriority as $key => $value) { |
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// If value isn't an array, we can overwrite whatever was before it |
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if(!is_array($value)) { |
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if(is_int($key)) { |
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$lowPriority[] = $value; |
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} else { |
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$lowPriority[$key] = $value; |
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} |
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continue; |
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} |
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// If not set, or we're changing type we can set low priority |
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if(!isset($lowPriority[$key]) || !is_array($lowPriority[$key])) { |
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if(is_int($key)) { |
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$lowPriority[] = $value; |
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} else { |
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$lowPriority[$key] = $value; |
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} |
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continue; |
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} |
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// We have two arrays, so we merge |
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$lowPriority[$key] = $this->mergeArray($value, $lowPriority[$key]); |
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} |
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return $lowPriority; |
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} |
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/** |
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* Returns a normalised array with value/metadata keys |
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* |
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* @param array |
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* |
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* @return array |
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*/ |
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protected function normaliseItem(array $item) |
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{ |
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if(!isset($item['value'])) { |
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$item['value'] = ''; |
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} |
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if(!isset($item['metadata'])) { |
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$item['metadata'] = []; |
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} |
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return ['value' => $item['value'], 'metadata' => $item['metadata']]; |
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} |
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} |
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micmania1 /
silverstripe-config
