private static Task <Document> RefactorAsync(
Document document,
RecordDeclarationSyntax recordDeclaration,
CancellationToken cancellationToken = default)
{
ParameterListSyntax parameterList = recordDeclaration.ParameterList;
BaseListSyntax baseList = recordDeclaration.BaseList;
SeparatedSyntaxList <ParameterSyntax> parameters = parameterList.Parameters;
var identifiersMap = new Dictionary <string, SyntaxToken>();
var statements = new List <StatementSyntax>();
var properties = new List <PropertyDeclarationSyntax>();
var allAttributeLists = new List <AttributeListSyntax>();
var baseType = baseList?
.Types
.FirstOrDefault(f => f.IsKind(SyntaxKind.PrimaryConstructorBaseType)) as PrimaryConstructorBaseTypeSyntax;
ImmutableHashSet <string> basePropertyNames = ImmutableHashSet <string> .Empty;
if (baseType != null)
{
basePropertyNames = baseType
.ArgumentList?
.Arguments
.Select(f => f.ToString())
.ToImmutableHashSet();
}
bool isWritable = !recordDeclaration.Modifiers.Contains(SyntaxKind.ReadOnlyKeyword) &&
recordDeclaration.ClassOrStructKeyword.IsKind(SyntaxKind.StructKeyword);
foreach (ParameterSyntax parameter in parameters)
{
SyntaxToken identifier = parameter.Identifier;
string identifierText = identifier.ValueText;
SyntaxToken parameterIdentifier = Identifier(StringUtility.FirstCharToLower(identifierText));
SyntaxToken propertyIdentifier = Identifier(StringUtility.FirstCharToUpper(identifierText));
identifiersMap.Add(identifier.ValueText, parameterIdentifier);
IEnumerable <AttributeListSyntax> attributeLists = parameter.AttributeLists.Where(f => f.Target?.Identifier.IsKind(SyntaxKind.PropertyKeyword) == true);
allAttributeLists.AddRange(attributeLists);
statements.Add(SimpleAssignmentStatement(
IdentifierName(propertyIdentifier).QualifyWithThis(),
IdentifierName(parameterIdentifier.WithTriviaFrom(identifier))));
if (!basePropertyNames.Contains(identifierText))
{
properties.Add(PropertyDeclaration(
attributeLists.Select(f => f.WithTarget(null)).ToSyntaxList(),
Modifiers.Public(),
parameter.Type,
default(ExplicitInterfaceSpecifierSyntax),
propertyIdentifier,
AccessorList(
AutoGetAccessorDeclaration(),
(isWritable) ? AutoSetAccessorDeclaration() : AutoInitAccessorDeclaration()
)));
}
}
ParameterListSyntax newParameterList = parameterList.RemoveNodes(
allAttributeLists,
SyntaxRemoveOptions.KeepLeadingTrivia | SyntaxRemoveOptions.KeepUnbalancedDirectives);
newParameterList = newParameterList.ReplaceTokens(
newParameterList.Parameters.Select(parameter => parameter.Identifier),
(identifier, _) => identifiersMap[identifier.ValueText]);
ParameterSyntax firstParameter = parameterList.Parameters[0];
if (firstParameter.GetLeadingTrivia().SingleOrDefault(shouldThrow: false).IsKind(SyntaxKind.WhitespaceTrivia))
{
SyntaxTriviaList newIndentation = SyntaxTriviaAnalysis.GetIncreasedIndentationTriviaList(firstParameter, cancellationToken);
newParameterList = newParameterList.ReplaceNodes(
newParameterList.Parameters,
(parameter, _) =>
{
return((parameter.GetLeadingTrivia().SingleOrDefault().IsKind(SyntaxKind.WhitespaceTrivia))
? parameter.WithLeadingTrivia(newIndentation)
: parameter);
});
}
ConstructorDeclarationSyntax constructor = ConstructorDeclaration(
Modifiers.Public(),
recordDeclaration.Identifier.WithoutTrivia(),
newParameterList,
Block(statements));
RecordDeclarationSyntax newRecord = recordDeclaration
.WithIdentifier(recordDeclaration.Identifier.WithTrailingTrivia(recordDeclaration.ParameterList.GetTrailingTrivia()))
.WithParameterList(null)
.WithSemicolonToken(default);