add linked GPOs functionality

templates/app.py

@@ -37,6 +37,42 @@ def get_groups():
                     })
     return jsonify(gpos)
 
+@app.route("/linked_ous", methods=["GET"])
+def linked_ous():
+    gpo_name = request.args.get("gpo")
+    if not gpo_name:
+        return jsonify({"error": "Missing 'gpo' query parameter"}), 400
+    linked = []
+    # The YAML is a list of dictionaries – iterate over them
+
+    for top in data or []:
+        cfg = top.get("configured_gpos", {})
+        if not isinstance(cfg, dict):
+            continue
+
+        # Grab the value for the requested GPO – it can be a dict *or* a list
+        gpo_entry = cfg.get(gpo_name)
+        if gpo_entry is None:
+            continue
+
+        # Case 1: direct dict → look for Linked_OUs key
+        if isinstance(gpo_entry, dict):
+            if "Linked_OUs" in gpo_entry:
+                ous = gpo_entry["Linked_OUs"]
+                if isinstance(ous, list):
+                    linked.extend(ous)
+            continue
+
+        # Case 2: list of dicts → find the dict that has the Linked_OUs key
+        if isinstance(gpo_entry, list):
+            for sub in gpo_entry:
+                if isinstance(sub, dict) and "Linked_OUs" in sub:
+                    ous = sub["Linked_OUs"]
+                    if isinstance(ous, list):
+                        linked.extend(ous)
+
+    return jsonify(linked)
+
 # test route
 @app.route('/test', methods=['GET'])
 def test():