private static async Task <Document> GenerateToString(
Document document,
ClassDeclarationSyntax classDeclarationSyntax,
IList <PropertyDeclarationSyntax> properties,
CancellationToken cancellationToken)
{
InvocationExpressionSyntax GenerateNameOfCall(SyntaxToken identifier) =>
ExpressionGenerationHelper.Invocation(
"nameof",
SyntaxHelpers.ArgumentFromIdentifier(identifier));
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (properties.Count == 0)
{
return(document);
}
var firstEl = Enumerable.Repeat(
(InterpolatedStringContentSyntax)SyntaxFactory.Interpolation(
GenerateNameOfCall(classDeclarationSyntax.Identifier)),
1);
var interpolatedStringExpression = InterpolatedStringGenerationHelper.InterpolatedString(
firstEl.Concat(
properties.SelectMany(p =>
new InterpolatedStringContentSyntax[]
{
InterpolatedStringGenerationHelper.Text($" "),
SyntaxFactory.Interpolation(GenerateNameOfCall(p.Identifier)),
InterpolatedStringGenerationHelper.Text($"="),
SyntaxFactory.Interpolation(SyntaxFactory.IdentifierName(p.Identifier.WithoutTrivia()))
})));
var methodExpression = MethodGenerationHelper.Builder(ToStringMethodName)
.Modifiers(Modifiers.Public, Modifiers.Override)
.ReturnType(Types.String)
.ArrowBody(ExpressionGenerationHelper.Arrow(interpolatedStringExpression))
.Build();
var previousToString = ClassDeclarationSyntaxAnalysis.GetMembers <MethodDeclarationSyntax>(
classDeclarationSyntax)
.FirstOrDefault(m => m.Identifier.ValueText.Equals(ToStringMethodName));
var newClassDeclaration =
previousToString != null?
classDeclarationSyntax.ReplaceNode(previousToString, methodExpression)
: classDeclarationSyntax.AddMembers(methodExpression);
var root = await tree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var newRoot = root.ReplaceNode(classDeclarationSyntax, newClassDeclaration);
var newDocument = document.WithSyntaxRoot(newRoot);
return(newDocument);
}
private static async Task <Document> GenerateCreateMethod(
Document document,
ConstructorDeclarationSyntax constructor,
CancellationToken cancellationToken)
{
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
var classDeclaration = constructor
.Parent.FirstAncestorOrSelf <ClassDeclarationSyntax>();
if (classDeclaration == null)
{
return(document);
}
var classType = SyntaxFactory.IdentifierName(
classDeclaration.Identifier.WithoutTrivia());
var createObjectExpression =
ExpressionGenerationHelper.CreateObject(
classType,
constructor.ParameterList.ToArgumentArray());
var createMethodExpression = MethodGenerationHelper.Builder(CreateMethodName)
.Modifiers(Modifiers.Public, Modifiers.Static)
.Parameters(constructor.ParameterList.Parameters.ToArray())
.ReturnType(SyntaxFactory.IdentifierName(classDeclaration.Identifier.WithoutTrivia()))
.ArrowBody(ExpressionGenerationHelper.Arrow(createObjectExpression))
.Build();
// TODO: validate argument types as well ?
var previousCreate =
ClassDeclarationSyntaxAnalysis.GetMembers <MethodDeclarationSyntax>(classDeclaration)
.FirstOrDefault(m =>
m.Identifier.ValueText.Equals(CreateMethodName) &&
m.ParameterList.Parameters.Count == createMethodExpression.ParameterList.Parameters.Count);
// TODO: align with "with" method generation
var newClassDeclaration = classDeclaration;
if (previousCreate == null)
{
createMethodExpression = createMethodExpression
.NormalizeWhitespace(elasticTrivia: false)
.WithLeadingTrivia(
Settings.EndOfLine,
SyntaxFactory.ElasticSpace)
.WithTrailingTrivia(Settings.EndOfLine);
newClassDeclaration = newClassDeclaration.InsertNodesAfter(constructor, new[] { createMethodExpression });
}
else
{
createMethodExpression = createMethodExpression
.NormalizeWhitespace(elasticTrivia: false)
.WithTriviaFrom(previousCreate);
newClassDeclaration = newClassDeclaration.ReplaceNode(previousCreate, createMethodExpression);
}
var root = await tree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var newRoot = root.ReplaceNode(classDeclaration, newClassDeclaration);
var newDocument = document.WithSyntaxRoot(newRoot);
return(newDocument);
}
private static async Task <Document> GenerateWithMethods(
Document document,
ClassDeclarationSyntax classDeclarationSyntax,
IList <PropertyDeclarationSyntax> properties,
int[] propertyToParameterIdx,
CancellationToken cancellationToken)
{
int MappedIdx(int i)
{
int mappedIdx = propertyToParameterIdx[i];
if (mappedIdx == -1)
{
throw new ArgumentException($"{nameof(propertyToParameterIdx)} contains invalid mapping");
}
return(mappedIdx);
}
ArgumentSyntax[] ReorderArgumentsToMapping(IReadOnlyList <ArgumentSyntax> arguments)
{
var result = new ArgumentSyntax[arguments.Count];
for (int i = 0; i < arguments.Count; ++i)
{
result[MappedIdx(i)] = arguments[i];
}
return(result);
}
T ExecuteWithTempArg <T>(ArgumentSyntax[] args, int argIdx, ArgumentSyntax tempArg, Func <ArgumentSyntax[], T> operation)
{
var oldArg = args[argIdx];
args[argIdx] = tempArg;
var result = operation(args);
args[argIdx] = oldArg;
return(result);
}
if (properties.Count != propertyToParameterIdx.Length)
{
throw new ArgumentException("properties.Count != propertyToParameterIdx.Length");
}
var tree = await document.GetSyntaxTreeAsync(cancellationToken).ConfigureAwait(false);
if (properties.Count == 0)
{
return(document);
}
var classType = SyntaxFactory.IdentifierName(classDeclarationSyntax.Identifier.WithoutTrivia());
var newClassDeclaration = classDeclarationSyntax;
var argumentsArray = properties.Select(p => p.ToArgument()).ToArray();
argumentsArray = ReorderArgumentsToMapping(argumentsArray);
for (int i = 0; i < properties.Count; ++i)
{
var p = properties[i];
var id = p.Identifier.WithoutTrivia();
var lcId = SyntaxHelpers.LowercaseIdentifierFirstLetter(id);
var methodName = WithRefactoringUtils.MethodName(p.Identifier);
var arg = SyntaxHelpers.ArgumentFromIdentifier(lcId);
var objectCreation = ExecuteWithTempArg(argumentsArray, MappedIdx(i), arg, args => ExpressionGenerationHelper.CreateObject(classType, args));
var withMethodExpression = MethodGenerationHelper.Builder(methodName)
.Modifiers(Modifiers.Public)
.Parameters(SyntaxHelpers.Parameter(p.Type, lcId))
.ReturnType(SyntaxFactory.IdentifierName(classDeclarationSyntax.Identifier.WithoutTrivia()))
.ArrowBody(ExpressionGenerationHelper.Arrow(objectCreation))
.Build();
var previousWith = ClassDeclarationSyntaxAnalysis.GetMembers <MethodDeclarationSyntax>(
newClassDeclaration)
.FirstOrDefault(m => m.Identifier.ValueText.Equals(methodName));
if (previousWith == null)
{
// TODO: Group with members next to each other rather than adding at the end
withMethodExpression = withMethodExpression
.NormalizeWhitespace(elasticTrivia: false)
.WithLeadingTrivia(
Settings.EndOfLine,
SyntaxFactory.ElasticSpace)
.WithTrailingTrivia(Settings.EndOfLine);
newClassDeclaration = newClassDeclaration.AddMembers(withMethodExpression);
}
else
{
withMethodExpression = withMethodExpression
.NormalizeWhitespace(elasticTrivia: false)
.WithTriviaFrom(previousWith);
newClassDeclaration = newClassDeclaration.ReplaceNode(previousWith, withMethodExpression);
}
}
var root = await tree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var newRoot = root.ReplaceNode(classDeclarationSyntax, newClassDeclaration);
var newDocument = document.WithSyntaxRoot(newRoot);
return(newDocument);
}