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<?php declare(strict_types=1); |
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/** |
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* Created by Vitaly Iegorov <[email protected]>. |
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* on 08.04.17 at 09:08 |
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*/ |
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namespace samsonframework\stringconditiontree\string; |
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use samsonframework\stringconditiontree\AbstractIterable; |
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/** |
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* Class StructureCollection |
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* |
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* @author Vitaly Egorov <[email protected]> |
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*/ |
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class StructureCollection extends AbstractIterable |
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{ |
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/** string Internal collection name */ |
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protected const COLLECTION_NAME = 'structures'; |
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/** @var Structure[] */ |
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protected $structures = []; |
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/** |
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* Create structures collection from array of strings. |
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* |
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* @param array $strings Strings array |
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* |
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* @return StructureCollection StructureCollection instance |
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*/ |
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public static function fromStringsArray(array $strings): StructureCollection |
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{ |
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// Create internalCollection |
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$structureCollection = new StructureCollection(); |
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foreach ($strings as $string) { |
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$structureCollection->structures[$string] = new Structure($string); |
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} |
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return $structureCollection; |
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} |
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/** |
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* Get collection of StructureCollection instances grouped by longest common prefixes. |
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* |
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* @return StructureCollection[] Longest common prefixes array of StructureCollection instances |
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*/ |
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public function getCommonPrefixesCollection(): array |
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{ |
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$this->sort(); |
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/** @var StructureCollection[] $commonPrefixes */ |
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$commonPrefixes = []; |
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/** @var Structure[] $usedStructures */ |
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$usedStructures = []; |
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// Iterate sorted character group internalCollection |
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foreach ($this->structures as $initialStructure) { |
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$oneCommonPrefixFound = false; |
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// Iterate all character group internalCollection again |
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foreach ($this->structures as $comparedStructure) { |
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// Ignore same internalCollection |
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if ($initialStructure !== $comparedStructure) { |
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$foundPrefix = $initialStructure->getCommonPrefix($comparedStructure); |
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// If we have found common prefix between two structures |
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if ($foundPrefix !== '') { |
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/** |
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* Try to find if this prefix can be merged into already found common prefix |
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* as our structures collection is already sorted. |
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*/ |
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$foundPrefixStructure = new Structure($foundPrefix); |
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foreach ($commonPrefixes as $existingPrefix => $structures) { |
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$internalPrefix = (new Structure($existingPrefix))->getCommonPrefix($foundPrefixStructure); |
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if ($internalPrefix !== '') { |
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$foundPrefix = $internalPrefix; |
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break; |
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} |
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} |
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$this->addToCommonPrefixesCollection( |
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$commonPrefixes, |
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$foundPrefix, |
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$comparedStructure, |
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$usedStructures |
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); |
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$oneCommonPrefixFound = true; |
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} |
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} |
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} |
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if (!$oneCommonPrefixFound) { |
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$this->addToCommonPrefixesCollection( |
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$commonPrefixes, |
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$initialStructure->getString(), |
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$initialStructure, |
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$usedStructures |
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); |
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} |
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} |
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// Sort common prefixes |
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$commonPrefixesCollection = new StructureCollection(); |
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foreach ($commonPrefixes as $prefix => $structures) { |
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$commonPrefixesCollection->add(new Structure($prefix)); |
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} |
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$commonPrefixesCollection->sort(); |
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$final = []; |
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foreach ($commonPrefixesCollection as $prefix => $structureCollection) { |
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$final[$prefix] = $commonPrefixes[$prefix]; |
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} |
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return $final; |
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} |
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/** |
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* Sort structures. |
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* |
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* @param bool $ascending Ascending sorting order |
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*/ |
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protected function sort(bool $ascending = true): void |
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{ |
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// Sort internalCollection |
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uasort($this->structures, function (Structure $initial, Structure $compared) { |
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return $initial->compare($compared); |
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}); |
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// Sort descending if needed |
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$this->structures = $ascending ? array_reverse($this->structures) : $this->structures; |
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} |
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private function addToCommonPrefixesCollection( |
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array &$commonPrefixes, |
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string $foundPrefix, |
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Structure $comparedStructure, |
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array &$usedStructures |
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): void { |
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// Create new structure collection with common prefix |
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if (!array_key_exists($foundPrefix, $commonPrefixes)) { |
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$commonPrefixes[$foundPrefix] = new StructureCollection(); |
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} |
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$newPrefix = substr($comparedStructure->getString(), strlen($foundPrefix)); |
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if ($newPrefix !== '' && !in_array($comparedStructure, $usedStructures, false)) { |
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$usedStructures[] = $comparedStructure; |
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// Add structure to structure collection |
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$commonPrefixes[$foundPrefix]->add(new Structure($newPrefix)); |
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} |
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} |
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/** |
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* Add structure to structure collection. |
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* |
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* @param Structure $structure Added structure |
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*/ |
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public function add(Structure $structure): void |
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{ |
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$this->structures[$structure->getString()] = $structure; |
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} |
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/** |
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* @param Structure $structure |
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164
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* |
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165
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* @return bool |
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166
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*/ |
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167
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public function has(Structure $structure): bool |
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168
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{ |
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169
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return in_array($structure, $this->structures); |
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170
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} |
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} |
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samsonframework /
string-condition-tree
