refactor

frontend/src/documents/correspondents.js

@@ -0,0 +1,38 @@
+export const resolveCorrespondents = (doc) => {
+  if (!doc || !Array.isArray(doc.correspondents)) {
+    return [];
+  }
+
+  const seen = new Set();
+  const results = [];
+
+  doc.correspondents.forEach((entry, index) => {
+    if (!entry || typeof entry.name !== 'string') {
+      return;
+    }
+
+    const id = entry.id;
+    const name = entry.name.trim();
+    if (!name) {
+      return;
+    }
+
+    if (id && seen.has(id)) {
+      return;
+    }
+
+    if (id) {
+      seen.add(id);
+    }
+
+    results.push({
+      id,
+      name,
+      key: id ?? `${name}-${index}`,
+    });
+  });
+
+  return results;
+};
+
+export default resolveCorrespondents;