containsKeys method

@override Future<Map<String, bool>> containsKeys(List<String> keys)

Checks if the cache contains values associated with all the given keys.

Returns a map where the keys are the original keys and the values are booleans indicating whether the key exists in the cache.

Throws a CacheException if there is an error checking the keys.

Implementation

@override
Future<Map<String, bool>> containsKeys(List<String> keys) async {
  if (keys.isEmpty) return {};

  final db = await database;
  final placeholders = List.filled(keys.length, '?').join(',');
  final result = await db.query(
    'cache',
    columns: ['key'],
    where: 'key IN ($placeholders)',
    whereArgs: keys,
  );

  final foundKeys = result.map((e) => e['key'] as String).toSet();
  final Map<String, bool> containsMap = {};

  for (final key in keys) {
    containsMap[key] = foundKeys.contains(key);
  }

  return containsMap;
}