Mager updated

app/Services/CsvImportService.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace App\Services;
+
+class CsvImportService
+{
+    /**
+     * Read the first line of a file; returns null on failure.
+     */
+    public function readFirstLine(string $path): ?string
+    {
+        $fh = @fopen($path, 'r');
+        if (!$fh) return null;
+        $line = fgets($fh);
+        fclose($fh);
+        return $line === false ? null : $line;
+    }
+
+    /**
+     * Detect delimiter and return columns for first row.
+     * If $hasHeader is false, returns positional indices instead of header names.
+     * Returns [delimiter, columns].
+     */
+    public function detectColumnsFromCsv(string $path, bool $hasHeader): array
+    {
+        // Use actual tab character for TSV; keep other common delimiters
+        $delims = [',',';','|',"\t"]; 
+        $bestDelim = ',';
+        $bestCols = [];
+
+        $firstLine = $this->readFirstLine($path);
+        if ($firstLine === null) {
+            return [$bestDelim, []];
+        }
+
+        $maxCount = 0;
+        foreach ($delims as $d) {
+            $row = str_getcsv($firstLine, $d);
+            $count = is_array($row) ? count($row) : 0;
+            if ($count > $maxCount) {
+                $maxCount = $count;
+                $bestDelim = $d;
+                $bestCols = $row;
+            }
+        }
+
+        if (!$hasHeader) {
+            // return positional indices 0..N-1
+            $cols = [];
+            for ($i = 0; $i < $maxCount; $i++) {
+                $cols[] = (string) $i;
+            }
+            return [$bestDelim, $cols];
+        }
+
+        // Clean header names
+        $clean = array_map(function ($v) {
+            $v = trim((string) $v);
+            $v = preg_replace('/\s+/', ' ', $v);
+            return $v;
+        }, $bestCols);
+
+        return [$bestDelim, $clean];
+    }
+}