IntroduceAndInitializeFieldRefactoring.cs

// Copyright (c) .NET Foundation and Contributors. Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.

using System.Collections.Generic;
using Microsoft.CodeAnalysis;
using Microsoft.CodeAnalysis.CSharp;
using Microsoft.CodeAnalysis.CSharp.Syntax;

namespace Roslynator.CSharp.Refactorings.IntroduceAndInitialize;

internal class IntroduceAndInitializeFieldRefactoring : IntroduceAndInitializeRefactoring
{
    public IntroduceAndInitializeFieldRefactoring(IntroduceAndInitializeInfo info)
        : base(info)
    {
    }

    public IntroduceAndInitializeFieldRefactoring(IEnumerable<IntroduceAndInitializeInfo> infos)
        : base(infos)
    {
    }

    protected override int GetDeclarationIndex(SyntaxList<MemberDeclarationSyntax> members)
    {
        int index = members.LastIndexOf(SyntaxKind.FieldDeclaration);

        if (index != -1)
            return index + 1;

        index = members.IndexOf(SyntaxKind.ConstructorDeclaration);

        if (index != -1)
            return index;

        return 0;
    }

    protected override RefactoringDescriptor GetDescriptor()
    {
        return RefactoringDescriptors.IntroduceAndInitializeField;
    }

    protected override string GetTitle()
    {
        if (Infos.Length > 1)
        {
            return $"Introduce and initialize fields {GetNames()}";
        }
        else
        {
            return $"Introduce and initialize field '{FirstInfo.Name}'";
        }
    }
}