Function diff_objects

nodedb/src/event/field_diff.rs:192–234

Diff two JSON objects field-by-field.

(
    diffs: &mut Vec<FieldDiff>,
    prefix: &str,
    old_map: &serde_json::Map<String, serde_json::Value>,
    new_map: &serde_json::Map<String, serde_json::Value>,
)

/// Diff two JSON objects field-by-field.
fn diff_objects(
    diffs: &mut Vec<FieldDiff>,
    prefix: &str,
    old_map: &serde_json::Map<String, serde_json::Value>,
    new_map: &serde_json::Map<String, serde_json::Value>,
) {
    // Fields in old that are modified or removed in new.
    for (key, old_val) in old_map {
        let path = if prefix.is_empty() {
            key.clone()
        } else {
            format!("{prefix}.{key}")
        };
        match new_map.get(key) {
            Some(new_val) => diff_values(diffs, &path, old_val, new_val),
            None => {
                diffs.push(FieldDiff {
                    field: path,
                    op: DiffOp::Removed,
                    old_value: Some(old_val.clone()),
                    new_value: None,
                });
            }
        }
    }

    // Fields in new that were added (not in old).
    for (key, new_val) in new_map {
        if !old_map.contains_key(key) {
            let path = if prefix.is_empty() {
                key.clone()
            } else {
                format!("{prefix}.{key}")
            };
            diffs.push(FieldDiff {
                field: path,
                op: DiffOp::Added,
                old_value: None,
                new_value: Some(new_val.clone()),
            });
        }
    }
}

/// Diff two JSON arrays element-by-element.
///