fromJson static method

PurchaseHistorySchema? fromJson(dynamic value)

Returns a new PurchaseHistorySchema instance and imports its values from value if it's a Map, null otherwise.

Implementation

// ignore: prefer_constructors_over_static_methods
static PurchaseHistorySchema? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      assert(json.containsKey(r'type'),
          'Required key "PurchaseHistorySchema[type]" is missing from JSON.');
      assert(json[r'type'] != null,
          'Required key "PurchaseHistorySchema[type]" has a null value in JSON.');
      assert(json.containsKey(r'description'),
          'Required key "PurchaseHistorySchema[description]" is missing from JSON.');
      assert(json[r'description'] != null,
          'Required key "PurchaseHistorySchema[description]" has a null value in JSON.');
      assert(json.containsKey(r'amount'),
          'Required key "PurchaseHistorySchema[amount]" is missing from JSON.');
      assert(json[r'amount'] != null,
          'Required key "PurchaseHistorySchema[amount]" has a null value in JSON.');
      assert(json.containsKey(r'created_at'),
          'Required key "PurchaseHistorySchema[created_at]" is missing from JSON.');
      assert(json[r'created_at'] != null,
          'Required key "PurchaseHistorySchema[created_at]" has a null value in JSON.');
      return true;
    }());

    return PurchaseHistorySchema(
      type: PurchaseType.fromJson(json[r'type'])!,
      description: mapValueOfType<String>(json, r'description')!,
      amount: mapValueOfType<int>(json, r'amount')!,
      gemsCredited: mapValueOfType<int>(json, r'gems_credited') ?? 0,
      createdAt: mapDateTime(json, r'created_at', r'')!,
    );
  }
  return null;
}