Add initial implementation of Fantacalcio application

logic.php

@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * Detects the field delimiter (';' or ',') for a CSV file.
+ * It bases the detection on the character count in the header row.
+ */
+function detectSeparators(string $csvContent): array
+{
+    $lines = preg_split('/\r\n|\n|\r/', trim($csvContent));
+    $header = $lines[0] ?? '';
+
+    $semicolonCount = substr_count($header, ';');
+    $commaCount = substr_count($header, ',');
+
+    // If comma count is higher, we assume comma is the delimiter.
+    // Otherwise, we default to semicolon, which is common in many European locales.
+    if ($commaCount > $semicolonCount) {
+        $delimiter = ',';
+    } else {
+        $delimiter = ';';
+    }
+
+    // The decimal separator is no longer detected here, 
+    // as it will be handled on a per-value basis.
+    return [
+        'delimiter' => $delimiter
+    ];
+}
+
+/**
+ * Recursively traverses an array and converts numeric strings to int or float.
+ * Non-numeric strings are left unchanged.
+ *
+ * @param array $array The array to process, passed by reference.
+ */
+function recursively_convert_numeric_strings(array &$array)
+{
+    foreach ($array as &$value) {
+        if (is_array($value)) {
+            // If the value is an array, recurse into it
+            recursively_convert_numeric_strings($value);
+        } elseif (is_string($value) && is_numeric($value)) {
+            // If the value is a string and represents a number, convert it
+            // Check if it's an integer or a float
+            if ((float)$value == (int)$value) {
+                $value = (int)$value;
+            } else {
+                $value = (float)$value;
+            }
+        }
+        // If it's not a string, not numeric, or not an array, it's left as is.
+    }
+}