requestSchema function

Future<IList<GraphQLTypeDeclaration>> requestSchema(Uri uri)

Implementation

Future<IList<GraphQLTypeDeclaration>> requestSchema(Uri uri) async {
  final response = await graphQLPost(query: '''
query IntrospectionQuery {
  __schema {

    queryType { name }
    mutationType { name }
    subscriptionType { name }
    types {
      ...FullType
    }
    directives {
      name
      description

      locations
      args {
        ...InputValue
      }
    }
  }
}

fragment FullType on __Type {
  kind
  name
  description
  fields(includeDeprecated: true) {
    name
    description
    args {
      ...InputValue
    }
    type {
      ...TypeRef
    }
    isDeprecated
    deprecationReason
  }
  inputFields {
    ...InputValue
  }
  interfaces {
    ...TypeRef
  }
  enumValues(includeDeprecated: true) {
    name
    description
    isDeprecated
    deprecationReason
  }
  possibleTypes {
    ...TypeRef
  }
}

fragment InputValue on __InputValue {
  name
  description
  type { ...TypeRef }
  defaultValue
}

fragment TypeRef on __Type {
  kind
  name
  ofType {
    kind
    name
    ofType {
      kind
      name
      ofType {
        kind
        name
        ofType {
          kind
          name
          ofType {
            kind
            name
            ofType {
              kind
              name
              ofType {
                kind
                name
              }
            }
          }
        }
      }
    }
  }
}
''', uri: uri);
  final data = response.data;
  if (data == null) {
    throw Exception('data is null');
  }
  final schema = data.getValueByKeyOrThrow('__schema');
  final queryTypeName = schema
      .getObjectValueOrThrow('queryType')
      .getObjectValueOrThrow('name')
      .asStringOrThrow();
  final mutationTypeName = schema
      .getObjectValueOrThrow('mutationType')
      .getObjectValueOrThrow('name')
      .asStringOrThrow();
  final typeList = schema.getObjectValueOrThrow('types');
  return IList(
    typeList.getAsArrayWithDecoder(
      (v) => _graphQLTypeToDartClassDeclaration(
        value: v,
        queryTypeName: queryTypeName,
        mutationTypeName: mutationTypeName,
      ),
    ),
  );
}