82 lines
2.4 KiB
PHP
82 lines
2.4 KiB
PHP
<?php
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/**
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* League.Csv (https://csv.thephpleague.com)
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*
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* (c) Ignace Nyamagana Butera <nyamsprod@gmail.com>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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declare(strict_types=1);
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namespace League\Csv;
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use Deprecated;
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use function array_fill_keys;
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use function array_filter;
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use function array_reduce;
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use function array_unique;
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use function count;
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use function strlen;
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use const COUNT_RECURSIVE;
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final class Info implements ByteSequence
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{
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/**
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* Returns the BOM sequence found at the start of the string.
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*
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* If no valid BOM sequence is found an empty string is returned
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*
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* @deprecated since version 9.16.0
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* @see Bom::tryFromSequence()
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* @codeCoverageIgnore
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*/
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#[Deprecated(message:'use League\Csv\Bom::tryFromSequence() instead', since:'league/csv:9.16.0')]
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public static function fetchBOMSequence(string $str): ?string
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{
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return Bom::tryFromSequence($str)?->value;
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}
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/**
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* Detect Delimiters usage in a {@link Reader} object.
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*
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* Returns a associative array where each key represents
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* a submitted delimiter and each value the number CSV fields found
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* when processing at most $limit CSV records with the given delimiter
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*
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* @param array<string> $delimiters
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* @param int<-1, max> $limit
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*
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* @return array<string, int>
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*/
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public static function getDelimiterStats(Reader $csv, array $delimiters, int $limit = 1): array
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{
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$currentHeaderOffset = $csv->getHeaderOffset();
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$currentDelimiter = $csv->getDelimiter();
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$stats = array_reduce(
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array_unique(array_filter($delimiters, fn (string $value): bool => 1 === strlen($value))),
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fn (array $stats, string $delimiter): array => [
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...$stats,
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...[$delimiter => count([
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...$csv
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->setHeaderOffset(null)
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->setDelimiter($delimiter)
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->slice(0, $limit)
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->filter(fn (array $record, int|string $key): bool => 1 < count($record)),
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], COUNT_RECURSIVE)],
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],
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array_fill_keys($delimiters, 0)
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);
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$csv->setHeaderOffset($currentHeaderOffset);
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$csv->setDelimiter($currentDelimiter);
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return $stats;
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}
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}
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