66 lines
1.7 KiB
PHP
66 lines
1.7 KiB
PHP
<?php
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namespace App\Services;
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class CsvImportService
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{
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/**
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* Read the first line of a file; returns null on failure.
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*/
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public function readFirstLine(string $path): ?string
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{
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$fh = @fopen($path, 'r');
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if (!$fh) return null;
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$line = fgets($fh);
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fclose($fh);
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return $line === false ? null : $line;
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}
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/**
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* Detect delimiter and return columns for first row.
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* If $hasHeader is false, returns positional indices instead of header names.
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* Returns [delimiter, columns].
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*/
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public function detectColumnsFromCsv(string $path, bool $hasHeader): array
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{
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// Use actual tab character for TSV; keep other common delimiters
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$delims = [',',';','|',"\t"];
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$bestDelim = ',';
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$bestCols = [];
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$firstLine = $this->readFirstLine($path);
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if ($firstLine === null) {
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return [$bestDelim, []];
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}
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$maxCount = 0;
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foreach ($delims as $d) {
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$row = str_getcsv($firstLine, $d);
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$count = is_array($row) ? count($row) : 0;
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if ($count > $maxCount) {
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$maxCount = $count;
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$bestDelim = $d;
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$bestCols = $row;
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}
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}
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if (!$hasHeader) {
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// return positional indices 0..N-1
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$cols = [];
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for ($i = 0; $i < $maxCount; $i++) {
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$cols[] = (string) $i;
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}
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return [$bestDelim, $cols];
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}
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// Clean header names
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$clean = array_map(function ($v) {
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$v = trim((string) $v);
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$v = preg_replace('/\s+/', ' ', $v);
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return $v;
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}, $bestCols);
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return [$bestDelim, $clean];
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}
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}
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