blob: 2753a8165fe7c92db8bef31a8825fca01e2b8f8a [file] [log] [blame]
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
import 'package:analysis_server/src/services/correction/dart/abstract_producer.dart';
import 'package:analysis_server/src/services/correction/fix.dart';
import 'package:analyzer/dart/ast/ast.dart';
import 'package:analyzer_plugin/utilities/change_builder/change_builder_core.dart';
import 'package:analyzer_plugin/utilities/fixes/fixes.dart';
import 'package:analyzer_plugin/utilities/range_factory.dart';
class ConvertToWhereType extends CorrectionProducer {
@override
FixKind get fixKind => DartFixKind.CONVERT_TO_WHERE_TYPE;
@override
Future<void> compute(ChangeBuilder builder) async {
var node = this.node;
if (node is! SimpleIdentifier || node.parent is! MethodInvocation) {
return;
}
var methodName = node as SimpleIdentifier;
var invocation = node.parent as MethodInvocation;
var arguments = invocation.argumentList.arguments;
if (arguments.length != 1 || arguments[0] is! FunctionExpression) {
return;
}
var body = (arguments[0] as FunctionExpression).body;
Expression returnValue;
if (body is ExpressionFunctionBody) {
returnValue = body.expression;
} else if (body is BlockFunctionBody) {
var statements = body.block.statements;
if (statements.length != 1 || statements[0] is! ReturnStatement) {
return;
}
returnValue = (statements[0] as ReturnStatement).expression;
} else {
return;
}
if (returnValue is! IsExpression) {
return;
}
var isExpression = returnValue as IsExpression;
if (isExpression.notOperator != null) {
return;
}
var targetType = isExpression.type;
await builder.addDartFileEdit(file, (builder) {
builder.addReplacement(range.startEnd(methodName, invocation), (builder) {
builder.write('whereType<');
builder.write(utils.getNodeText(targetType));
builder.write('>()');
});
});
}
/// Return an instance of this class. Used as a tear-off in `FixProcessor`.
static ConvertToWhereType newInstance() => ConvertToWhereType();
}