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<?php |
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declare(strict_types=1); |
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namespace Sokil\IsoCodes; |
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/** |
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* Abstract collection of ISO entries loaded from single file |
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*/ |
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abstract class AbstractNotPartitionedDatabase extends AbstractDatabase |
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{ |
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/** |
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* Index to search by entry field's values |
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* |
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* {indexedFieldName => {indexedFieldValue => entryObject}} |
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* |
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* @psalm-var Array<string, Array<string, object>> |
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* @var object[][] |
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*/ |
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private $index; |
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/** |
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* List of entry fields to be indexed and searched. |
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* May be override in child classes to search by indexed fields. |
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* |
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* @return mixed[] |
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*/ |
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protected function getIndexDefinition(): array |
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{ |
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return []; |
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} |
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private function buildIndex(): void |
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{ |
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// init empty index |
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$this->index = []; |
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// get index definition |
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$indexedFields = $this->getIndexDefinition(); |
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// build index for database |
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if (!empty($indexedFields)) { |
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// init all defined indexes |
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foreach ($this->getClusterIndex() as $entryArray) { |
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$entry = $this->arrayToEntry($entryArray); |
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foreach ($indexedFields as $indexName => $indexDefinition) { |
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if (is_array($indexDefinition)) { |
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// compound index |
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// iteratively create hierarchy of array indexes |
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$reference = &$this->index[$indexName]; |
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foreach ($indexDefinition as $indexDefinitionPart) { |
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if (is_array($indexDefinitionPart)) { |
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// limited length of field |
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$indexDefinitionPartValue = substr( |
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$entryArray[$indexDefinitionPart[0]], |
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0, |
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$indexDefinitionPart[1] |
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); |
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} else { |
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$indexDefinitionPartValue = $entryArray[$indexDefinitionPart]; |
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} |
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if (!isset($reference[$indexDefinitionPartValue])) { |
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$reference[$indexDefinitionPartValue] = []; |
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} |
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$reference = &$reference[$indexDefinitionPartValue]; |
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} |
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// add value |
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$reference = $entry; |
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} else { |
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// single index |
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$indexName = $indexDefinition; |
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// skip empty field |
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if (empty($entryArray[$indexDefinition])) { |
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continue; |
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} |
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// add to indexUA |
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$this->index[$indexName][$entryArray[$indexDefinition]] = $entry; |
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} |
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} |
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} |
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} |
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} |
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/** |
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* @return mixed[] |
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* |
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* @throws \InvalidArgumentException If no index found in database |
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*/ |
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private function getIndex(string $indexedFieldName): array |
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{ |
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// build index |
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if ($this->index === null) { |
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$this->buildIndex(); |
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} |
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// get index |
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if (!isset($this->index[$indexedFieldName])) { |
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throw new \InvalidArgumentException( |
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sprintf( |
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'Unknown index "%s" in database "%s"', |
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$indexedFieldName, |
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get_class() |
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) |
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); |
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} |
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return $this->index[$indexedFieldName]; |
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} |
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/** |
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* @param string $indexedFieldName |
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* @param string $fieldValue |
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* |
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* @return null|object|object[] null when not found, object when found by single-field index, |
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* object[] when found by compound index |
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*/ |
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protected function find(string $indexedFieldName, string $fieldValue) |
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{ |
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$fieldIndex = $this->getIndex($indexedFieldName); |
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return $fieldIndex[$fieldValue] ?? null; |
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} |
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} |
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sokil /
php-isocodes
