Diff two schema snapshots. Returns structured diff.
(old: dict, new: dict)
| 45 | |
| 46 | |
| 47 | def diff_schemas(old: dict, new: dict) -> dict: |
| 48 | """Diff two schema snapshots. Returns structured diff.""" |
| 49 | results = {"added_elements": [], "removed_elements": [], "attribute_changes": []} |
| 50 | |
| 51 | old_keys = set(k for k in old if not k.startswith("_")) |
| 52 | new_keys = set(k for k in new if not k.startswith("_")) |
| 53 | |
| 54 | # Top-level element additions/removals |
| 55 | for elem in sorted(new_keys - old_keys): |
| 56 | results["added_elements"].append(elem) |
| 57 | for elem in sorted(old_keys - new_keys): |
| 58 | results["removed_elements"].append(elem) |
| 59 | |
| 60 | # Attribute-level diffs for shared elements |
| 61 | for elem in sorted(old_keys & new_keys): |
| 62 | old_elem = old[elem] |
| 63 | new_elem = new[elem] |
| 64 | |
| 65 | if isinstance(old_elem, dict) and isinstance(new_elem, dict): |
| 66 | # Check "attrs" key |
| 67 | if "attrs" in old_elem and "attrs" in new_elem: |
| 68 | added, removed = diff_lists(old_elem["attrs"], new_elem["attrs"]) |
| 69 | if added or removed: |
| 70 | results["attribute_changes"].append({ |
| 71 | "element": elem, |
| 72 | "field": "attrs", |
| 73 | "added": added, |
| 74 | "removed": removed |
| 75 | }) |
| 76 | |
| 77 | # Check nested dicts (e.g., actuator_types, equality, etc.) |
| 78 | for key in set(list(old_elem.keys()) + list(new_elem.keys())): |
| 79 | if key in ("attrs", "children", "wrap_types", "targets"): |
| 80 | continue |
| 81 | old_val = old_elem.get(key, []) |
| 82 | new_val = new_elem.get(key, []) |
| 83 | if isinstance(old_val, list) and isinstance(new_val, list): |
| 84 | added, removed = diff_lists(old_val, new_val) |
| 85 | if added or removed: |
| 86 | results["attribute_changes"].append({ |
| 87 | "element": f"{elem}.{key}", |
| 88 | "field": "attrs", |
| 89 | "added": added, |
| 90 | "removed": removed |
| 91 | }) |
| 92 | |
| 93 | # Check "children" key |
| 94 | if "children" in old_elem and "children" in new_elem: |
| 95 | added, removed = diff_lists(old_elem["children"], new_elem["children"]) |
| 96 | if added or removed: |
| 97 | results["attribute_changes"].append({ |
| 98 | "element": elem, |
| 99 | "field": "children", |
| 100 | "added": added, |
| 101 | "removed": removed |
| 102 | }) |
| 103 | |
| 104 | elif isinstance(old_elem, list) and isinstance(new_elem, list): |