added end column for XLS in template and import

public/userarea/process_edit_template_xls.php

@@ -4,6 +4,35 @@ require_once 'class/db-functions.php';
 
 $response = ["success" => false, "message" => ""];
 
+function excelColumnToIndex($column)
+{
+    $column = strtoupper(trim((string)$column));
+
+    if ($column === '') {
+        return null;
+    }
+
+    // Numeric column index, example: 40
+    if (ctype_digit($column)) {
+        $index = (int)$column;
+        return $index > 0 ? $index : null;
+    }
+
+    // Excel column letters, example: A, AN, XFC
+    if (!preg_match('/^[A-Z]+$/', $column)) {
+        return null;
+    }
+
+    $index = 0;
+    $length = strlen($column);
+
+    for ($i = 0; $i < $length; $i++) {
+        $index = ($index * 26) + (ord($column[$i]) - ord('A') + 1);
+    }
+
+    return $index;
+}
+
 try {
     if ($_SERVER["REQUEST_METHOD"] !== "POST") {
         throw new Exception("Invalid request method.");
@@ -19,6 +48,8 @@ try {
         : null;
 
     $start_column = trim($_POST['start_column'] ?? '');
+    $xls_end_column = strtoupper(trim($_POST['xls_end_column'] ?? ''));
+    $xls_end_column = $xls_end_column !== '' ? $xls_end_column : null;
 
     $xls_sheet_index = isset($_POST['xls_sheet_index']) && $_POST['xls_sheet_index'] !== ''
         ? intval($_POST['xls_sheet_index'])
@@ -60,6 +91,24 @@ try {
             throw new Exception("XLS Sheet Number cannot be negative.");
         }
 
+        $startColumnIndex = excelColumnToIndex($start_column);
+
+        if ($startColumnIndex === null) {
+            throw new Exception("Start Column is not valid. Use Excel column letters like A, AN or a positive number.");
+        }
+
+        if ($xls_end_column !== null) {
+            $endColumnIndex = excelColumnToIndex($xls_end_column);
+
+            if ($endColumnIndex === null) {
+                throw new Exception("Last Column is not valid. Use Excel column letters like AN or a positive number.");
+            }
+
+            if ($endColumnIndex < $startColumnIndex) {
+                throw new Exception("Last Column cannot be before Start Column.");
+            }
+        }
+
         $api_config_id = null;
     }
 
@@ -71,6 +120,7 @@ try {
 
         $header_row = null;
         $start_column = null;
+        $xls_end_column = null;
         $xls_sheet_index = null;
     }
 
@@ -78,6 +128,7 @@ try {
     if ($source_type === 'PDF') {
         $header_row = null;
         $start_column = null;
+        $xls_end_column = null;
         $xls_sheet_index = null;
         $api_config_id = null;
     }
@@ -109,6 +160,7 @@ try {
             source_type = ?,
             header_row = ?,
             start_column = ?,
+            xls_end_column = ?,
             xls_sheet_index = ?,
             api_config_id = ?,
             description = ?,
@@ -131,6 +183,7 @@ try {
         $source_type,
         $header_row,
         $start_column,
+        $xls_end_column,
         $xls_sheet_index,
         $api_config_id,
         $description,