writeInstanceManagerApi method

Implementation

@override
void writeInstanceManagerApi(
  DartOptions generatorOptions,
  Root root,
  Indent indent, {
  required String dartPackageName,
}) {
  const String apiName = '${instanceManagerClassName}Api';

  final cb.Parameter binaryMessengerParameter = cb.Parameter(
    (cb.ParameterBuilder builder) => builder
      ..name = 'binaryMessenger'
      ..type = cb.refer('BinaryMessenger?')
      ..named = true,
  );

  final cb.Field binaryMessengerField = cb.Field(
    (cb.FieldBuilder builder) => builder
      ..name = '${varNamePrefix}binaryMessenger'
      ..type = cb.refer('BinaryMessenger?')
      ..modifier = cb.FieldModifier.final$,
  );

  final String removeStrongReferenceName = makeChannelNameWithStrings(
    apiName: apiName,
    methodName: 'removeStrongReference',
    dartPackageName: dartPackageName,
  );

  final cb.Class instanceManagerApi = cb.Class(
    (cb.ClassBuilder builder) => builder
      ..name = '_$apiName'
      ..docs.add(
        '/// Generated API for managing the Dart and native `$instanceManagerClassName`s.',
      )
      ..constructors.add(
        cb.Constructor(
          (cb.ConstructorBuilder builder) {
            builder
              ..docs.add('/// Constructor for [_$apiName].')
              ..optionalParameters.add(binaryMessengerParameter)
              ..initializers.add(
                cb.Code(
                  '${binaryMessengerField.name} = ${binaryMessengerParameter.name}',
                ),
              );
          },
        ),
      )
      ..fields.addAll(
        <cb.Field>[
          binaryMessengerField,
          cb.Field(
            (cb.FieldBuilder builder) {
              builder
                ..name = _pigeonChannelCodec
                ..type = cb.refer('MessageCodec<Object?>')
                ..static = true
                ..modifier = cb.FieldModifier.constant
                ..assignment = const cb.Code('StandardMessageCodec()');
            },
          )
        ],
      )
      ..methods.add(
        cb.Method(
          (cb.MethodBuilder builder) {
            builder
              ..name = 'setUpMessageHandlers'
              ..static = true
              ..returns = cb.refer('void')
              ..optionalParameters.addAll(<cb.Parameter>[
                cb.Parameter(
                  (cb.ParameterBuilder builder) => builder
                    ..name = '${classMemberNamePrefix}clearHandlers'
                    ..type = cb.refer('bool')
                    ..named = true
                    ..defaultTo = const cb.Code('false'),
                ),
                binaryMessengerParameter,
                cb.Parameter(
                  (cb.ParameterBuilder builder) => builder
                    ..name = 'instanceManager'
                    ..named = true
                    ..type = cb.refer('$instanceManagerClassName?'),
                ),
              ])
              ..body = cb.Block.of(
                cb.Block(
                  (cb.BlockBuilder builder) {
                    final StringBuffer messageHandlerSink = StringBuffer();
                    _writeFlutterMethodMessageHandler(
                      Indent(messageHandlerSink),
                      name: 'removeStrongReferenceName',
                      parameters: <Parameter>[
                        Parameter(
                          name: 'identifier',
                          type: const TypeDeclaration(
                            baseName: 'int',
                            isNullable: false,
                          ),
                        )
                      ],
                      returnType: const TypeDeclaration.voidDeclaration(),
                      channelName: removeStrongReferenceName,
                      isMockHandler: false,
                      isAsynchronous: false,
                      nullHandlerExpression:
                          '${classMemberNamePrefix}clearHandlers',
                      onCreateApiCall: (
                        String methodName,
                        Iterable<Parameter> parameters,
                        Iterable<String> safeArgumentNames,
                      ) {
                        return '(instanceManager ?? $instanceManagerClassName.instance).remove(${safeArgumentNames.single})';
                      },
                    );
                    builder.statements.add(
                      cb.Code(messageHandlerSink.toString()),
                    );
                  },
                ).statements,
              );
          },
        ),
      )
      ..methods.addAll(
        <cb.Method>[
          cb.Method(
            (cb.MethodBuilder builder) {
              builder
                ..name = 'removeStrongReference'
                ..returns = cb.refer('Future<void>')
                ..modifier = cb.MethodModifier.async
                ..requiredParameters.add(
                  cb.Parameter(
                    (cb.ParameterBuilder builder) => builder
                      ..name = 'identifier'
                      ..type = cb.refer('int'),
                  ),
                )
                ..body = cb.Block(
                  (cb.BlockBuilder builder) {
                    final StringBuffer messageCallSink = StringBuffer();
                    _writeHostMethodMessageCall(
                      Indent(messageCallSink),
                      addSuffixVariable: false,
                      channelName: removeStrongReferenceName,
                      parameters: <Parameter>[
                        Parameter(
                          name: 'identifier',
                          type: const TypeDeclaration(
                            baseName: 'int',
                            isNullable: false,
                          ),
                        ),
                      ],
                      returnType: const TypeDeclaration.voidDeclaration(),
                    );
                    builder.statements.addAll(<cb.Code>[
                      cb.Code(messageCallSink.toString()),
                    ]);
                  },
                );
            },
          ),
          cb.Method(
            (cb.MethodBuilder builder) {
              builder
                ..name = 'clear'
                ..returns = cb.refer('Future<void>')
                ..modifier = cb.MethodModifier.async
                ..docs.addAll(<String>[
                  '/// Clear the native `$instanceManagerClassName`.',
                  '///',
                  '/// This is typically called after a hot restart.',
                ])
                ..body = cb.Block(
                  (cb.BlockBuilder builder) {
                    final StringBuffer messageCallSink = StringBuffer();
                    _writeHostMethodMessageCall(
                      Indent(messageCallSink),
                      addSuffixVariable: false,
                      channelName: makeChannelNameWithStrings(
                        apiName: apiName,
                        methodName: 'clear',
                        dartPackageName: dartPackageName,
                      ),
                      parameters: <Parameter>[],
                      returnType: const TypeDeclaration.voidDeclaration(),
                    );
                    builder.statements.addAll(<cb.Code>[
                      cb.Code(messageCallSink.toString()),
                    ]);
                  },
                );
            },
          ),
        ],
      ),
  );

  final cb.DartEmitter emitter = cb.DartEmitter(useNullSafetySyntax: true);
  indent.format(
    DartFormatter().format('${instanceManagerApi.accept(emitter)}'),
  );
}