refactor: usa decisione di destinazione unificata per folder e zip

services/destinationIndex.js

@@ -0,0 +1,46 @@
+const fs = require('fs-extra');
+const path = require('path');
+
+const CODE_FOLDER_REGEX = /^\d{3}$/;
+const MAX_SCAN_DEPTH = 6;
+
+async function buildDestinationIndex(destinationRoot) {
+  const index = new Map();
+
+  if (!destinationRoot || !(await fs.pathExists(destinationRoot))) {
+    return index;
+  }
+
+  async function walk(currentDir, depth) {
+    if (depth > MAX_SCAN_DEPTH) {
+      return;
+    }
+
+    let entries;
+    try {
+      entries = await fs.readdir(currentDir, { withFileTypes: true });
+    } catch {
+      return;
+    }
+
+    for (const entry of entries) {
+      if (!entry.isDirectory()) {
+        continue;
+      }
+
+      const fullPath = path.join(currentDir, entry.name);
+      if (CODE_FOLDER_REGEX.test(entry.name)) {
+        const rows = index.get(entry.name) || [];
+        rows.push(fullPath);
+        index.set(entry.name, rows);
+      }
+
+      await walk(fullPath, depth + 1);
+    }
+  }
+
+  await walk(destinationRoot, 0);
+  return index;
+}
+
+module.exports = { buildDestinationIndex };