Function normalizeNestedJSONValue

pkg/matcher/utils.go:1785–1811

normalizeNestedJSONValue walks the parsed JSON value and replaces any string fields whose key is in rootKeys and whose value is itself valid JSON with the parsed inner JSON.

(v interface{}, rootKeys map[string]bool)

// string fields whose key is in rootKeys and whose value is itself valid
// JSON with the parsed inner JSON.
func normalizeNestedJSONValue(v interface{}, rootKeys map[string]bool) {
	switch t := v.(type) {
	case map[string]interface{}:
		for k, val := range t {
			lowerKey := strings.ToLower(k)

			// If this key is in rootKeys and the value is a JSON string, unwrap it.
			if rootKeys[lowerKey] {
				if s, ok := val.(string); ok && pkg.LooksLikeJSON(s) && json.Valid([]byte(s)) {
					var inner interface{}
					if err := json.Unmarshal([]byte(s), &inner); err == nil {
						t[k] = inner
						val = inner
					}
				}
			}

			// Recurse into children to handle deeper nested wrappers.
			normalizeNestedJSONValue(val, rootKeys)
		}

	case []interface{}:
		for i := range t {
			normalizeNestedJSONValue(t[i], rootKeys)
		}
	}
}