Insights/src/SourceGenerator/SetEmptyStringsBuilder.cs at main · NuGet/Insights · GitHub

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

using Microsoft.CodeAnalysis;

namespace NuGet.Insights
{
    public class SetEmptyStringsBuilder : IPropertyVisitor
    {
        private readonly StringBuilder _builder;
        private readonly int _indent;

        public SetEmptyStringsBuilder(int indent)
        {
            _indent = indent;
            _builder = new StringBuilder();
        }

        public void OnProperty(SourceProductionContext context, CsvRecordModel model, CsvPropertyModel property)
        {
            switch (property.Type)
            {
                case "string":
                    if (_builder.Length > 0)
                    {
                        _builder.AppendLine();
                        _builder.AppendLine();
                    }

                    _builder.Append(' ', _indent);
                    _builder.AppendFormat("if ({0} is null)", property.Name);
                    _builder.AppendLine();
                    _builder.Append(' ', _indent);
                    _builder.AppendLine("{");
                    _builder.Append(' ', _indent + 4);
                    _builder.AppendFormat("{0} = string.Empty;", property.Name);
                    _builder.AppendLine();
                    _builder.Append(' ', _indent);
                    _builder.Append("}");
                    break;
            }
        }

        public void Finish(SourceProductionContext context, CsvRecordModel model)
        {
        }

        public string GetResult()
        {
            return _builder.ToString();
        }
    }
}