Save worktree changes

src/data/utils.js

@@ -22,7 +22,27 @@ function readFormArray(body, key) {
   return [body[key]];
 }
 
+async function fetchDuplicateName(pool, tableName, name, excludeId, columnName) {
+  const normalizedName = String(name || '').trim();
+  if (!normalizedName) {
+    return null;
+  }
+
+  const normalizedColumnName = String(columnName || 'name').trim() || 'name';
+  const params = [normalizedName];
+  let sql = `SELECT id, \`${normalizedColumnName}\` AS name FROM \`${tableName}\` WHERE LOWER(TRIM(\`${normalizedColumnName}\`)) = LOWER(TRIM(?))`;
+  if (excludeId !== undefined && excludeId !== null) {
+    sql += ' AND id <> ?';
+    params.push(excludeId);
+  }
+  sql += ' LIMIT 1';
+
+  const [rows] = await pool.query(sql, params);
+  return rows[0] || null;
+}
+
 module.exports = {
   parseJsonSafe,
-  readFormArray
+  readFormArray,
+  fetchDuplicateName
 };