normalizeContextVariable function

VariableSchema? normalizeContextVariable(Map<String, dynamic> entry)

Parses one raw entry from templateConfig.contextVariables into a declaration named by its token, e.g. user.age. Returns null when the namespace or key is missing or unusable.

A missing or unknown type is inferred from a typed fallback, so a number or bool token still prints as one; anything else is text. With no fallback, a number falls back to 0 and a bool to false, so copy never shows a gap where the author expected a value.

Implementation

VariableSchema? normalizeContextVariable(Map<String, dynamic> entry) {
  final namespace = entry['namespace'];
  if (namespace != userNamespace && namespace != eventNamespace) return null;
  final key = entry['key'];
  if (key is! String || !_contextKeyPattern.hasMatch(key)) return null;
  final fallback = entry['fallbackValue'];
  final type = switch (entry['type']) {
    'number' => 'number',
    'bool' => 'bool',
    'string' => 'string',
    _ => switch (fallback) {
        num() => 'number',
        bool() => 'bool',
        _ => 'string',
      },
  };
  final authored = fallback?.toString() ?? '';
  return VariableSchema(
    name: '$namespace.$key',
    type: type,
    fallbackValue: authored.isNotEmpty
        ? authored
        : switch (type) {
            'number' => '0',
            'bool' => 'false',
            _ => '',
          },
  );
}