312 lines
17 KiB
C#
312 lines
17 KiB
C#
using Microsoft.CodeAnalysis;
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using Microsoft.CodeAnalysis.CSharp;
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using Microsoft.CodeAnalysis.CSharp.Syntax;
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using System.Collections.Immutable;
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using Telegrator.Analyzers.RoslynExtensions;
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#if DEBUG
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using System.Diagnostics;
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#endif
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namespace Telegrator.Analyzers
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{
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[Generator(LanguageNames.CSharp)]
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public class GeneratedKeyboardMarkupGenerator : IIncrementalGenerator
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{
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private const string InlineReturnType = "InlineKeyboardMarkup";
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private const string ReplyReturnType = "ReplyKeyboardMarkup";
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private const string CallbackDataAttribute = "CallbackButton";
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private const string CallbackGameAttribute = "GameButton";
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private const string CopyTextAttribute = "CopyTextButton";
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private const string LoginRequestAttribute = "LoginRequestButton";
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private const string PayRequestAttribute = "PayRequestButton";
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private const string SwitchQueryAttribute = "SwitchQueryButton";
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private const string QueryChosenAttribute = "QueryChosenButton";
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private const string QueryCurrentAttribute = "QueryCurrentButton";
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private const string UrlRedirectAttribute = "UrlRedirectButton";
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private const string WebAppAttribute = "WebApp";
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private static readonly string[] InlineAttributes = [CallbackDataAttribute, CallbackGameAttribute, CopyTextAttribute, LoginRequestAttribute, PayRequestAttribute, UrlRedirectAttribute, WebAppAttribute, SwitchQueryAttribute, QueryChosenAttribute, QueryCurrentAttribute];
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private static readonly string[] ReplyAttributes = [];
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private static readonly string[] DefaultUsings = ["Telegram.Bot.Types.ReplyMarkups"];
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private static readonly Dictionary<string, MemberAccessExpressionSyntax> InlineKeyboardLayout = new Dictionary<string, MemberAccessExpressionSyntax>()
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{
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{ CallbackDataAttribute, AccessExpression("InlineKeyboardButton", "WithCallbackData") },
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{ CallbackGameAttribute, AccessExpression("InlineKeyboardButton", "WithCallbackGame") },
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{ CopyTextAttribute, AccessExpression("InlineKeyboardButton", "WithCopyText") },
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{ LoginRequestAttribute, AccessExpression("InlineKeyboardButton", "WithLoginUrl") },
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{ PayRequestAttribute, AccessExpression("InlineKeyboardButton", "WithPay") },
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{ SwitchQueryAttribute, AccessExpression("InlineKeyboardButton", "WithSwitchInlineQuery") },
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{ QueryChosenAttribute, AccessExpression("InlineKeyboardButton", "WithSwitchInlineQueryChosenChat") },
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{ QueryCurrentAttribute, AccessExpression("InlineKeyboardButton", "WithSwitchInlineQueryCurrentChat") },
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{ UrlRedirectAttribute, AccessExpression("InlineKeyboardButton", "WithUrl") },
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{ WebAppAttribute, AccessExpression("InlineKeyboardButton", "WithWebApp") },
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};
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private static readonly Dictionary<string, MemberAccessExpressionSyntax> ReplyKeyboardLayout = new Dictionary<string, MemberAccessExpressionSyntax>()
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{
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};
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private static readonly Dictionary<string, Dictionary<string, MemberAccessExpressionSyntax>> LayoutNames = new Dictionary<string, Dictionary<string, MemberAccessExpressionSyntax>>()
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{
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{ InlineReturnType, InlineKeyboardLayout },
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{ ReplyReturnType, ReplyKeyboardLayout }
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};
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private static readonly DiagnosticDescriptor WrongReturnType = new DiagnosticDescriptor("TG_1001", "Wrong return type", string.Empty, "Modelling", DiagnosticSeverity.Error, true);
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private static readonly DiagnosticDescriptor UnsupportedAttribute = new DiagnosticDescriptor("TG_1002", "Unsupported attribute", string.Empty, "Modelling", DiagnosticSeverity.Error, true);
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private static readonly DiagnosticDescriptor NotPartialMethod = new DiagnosticDescriptor("TG_1003", "Not a partial method", string.Empty, "Modelling", DiagnosticSeverity.Error, true);
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private static readonly DiagnosticDescriptor UseBodylessMethod = new DiagnosticDescriptor("TG_1004", "Use bodyless method", string.Empty, "Modelling", DiagnosticSeverity.Error, true);
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private static readonly DiagnosticDescriptor UseParametrlessMethod = new DiagnosticDescriptor("TG_1005", "Use parametrless method", string.Empty, "Modelling", DiagnosticSeverity.Error, true);
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private static SyntaxTrivia TabulationTrivia => SyntaxFactory.SyntaxTrivia(SyntaxKind.WhitespaceTrivia, "\t");
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private static SyntaxTrivia WhitespaceTrivia => SyntaxFactory.SyntaxTrivia(SyntaxKind.WhitespaceTrivia, " ");
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private static SyntaxTrivia NewLineTrivia => SyntaxFactory.SyntaxTrivia(SyntaxKind.EndOfLineTrivia, "\n");
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private static SyntaxToken Semicolon => SyntaxFactory.Token(SyntaxKind.SemicolonToken);
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public void Initialize(IncrementalGeneratorInitializationContext context)
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{
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IncrementalValueProvider<ImmutableArray<MethodDeclarationSyntax>> pipeline = context.SyntaxProvider
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.CreateSyntaxProvider(Provide, Transform)
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.Where(x => x != null)
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.Collect();
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context.RegisterSourceOutput(pipeline, Execute);
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}
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private static bool Provide(SyntaxNode syntaxNode, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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if (syntaxNode is not MethodDeclarationSyntax method)
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return false;
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if (!HasGenAttributes(method))
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return false;
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return true;
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}
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private static MethodDeclarationSyntax Transform(GeneratorSyntaxContext context, CancellationToken cancellationToken)
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{
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cancellationToken.ThrowIfCancellationRequested();
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return (MethodDeclarationSyntax)context.Node;
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}
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private static void Execute(SourceProductionContext context, ImmutableArray<MethodDeclarationSyntax> methods)
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{
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List<GeneratedMarkupMethodModel> models = [];
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foreach (MethodDeclarationSyntax method in methods)
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{
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context.CancellationToken.ThrowIfCancellationRequested();
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try
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{
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string methodName = method.Identifier.Text;
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string returnType = method.ReturnType.ToString();
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bool anyErrors = false;
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if (!LayoutNames.TryGetValue(returnType, out var layout))
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{
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WrongReturnType.Report(context, method.ReturnType.GetLocation());
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anyErrors = true;
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}
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if (!method.Modifiers.HasModifiers("partial"))
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{
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NotPartialMethod.Report(context, method.Identifier.GetLocation());
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anyErrors = true;
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}
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if (method.ParameterList.Parameters.Any())
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{
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UseParametrlessMethod.Report(context, method.ParameterList.GetLocation());
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anyErrors = true;
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}
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if (method.ExpressionBody != null)
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{
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UseBodylessMethod.Report(context, method.ExpressionBody.GetLocation());
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anyErrors = true;
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}
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if (method.Body != null)
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{
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UseBodylessMethod.Report(context, method.Body.GetLocation());
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anyErrors = true;
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}
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if (anyErrors)
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return;
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context.CancellationToken.ThrowIfCancellationRequested();
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SeparatedSyntaxList<CollectionElementSyntax> vertical = new SeparatedSyntaxList<CollectionElementSyntax>();
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foreach (AttributeListSyntax attributeList in method.AttributeLists)
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{
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context.CancellationToken.ThrowIfCancellationRequested();
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SeparatedSyntaxList<CollectionElementSyntax> horizontal = new SeparatedSyntaxList<CollectionElementSyntax>();
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foreach (AttributeSyntax attribute in attributeList.Attributes)
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{
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context.CancellationToken.ThrowIfCancellationRequested();
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if (!layout.TryGetValue(attribute.Name.ToString(), out var accessSyntax))
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{
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UnsupportedAttribute.Report(context, attribute.Name.GetLocation());
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return;
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}
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InvocationExpressionSyntax expression = SyntaxFactory.InvocationExpression(accessSyntax, ConvertArguments(attribute.ArgumentList));
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horizontal = horizontal.Add(SyntaxFactory.ExpressionElement(expression));
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}
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ExpressionElementSyntax element = SyntaxFactory.ExpressionElement(SyntaxFactory.CollectionExpression(horizontal));
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vertical = vertical.Add(element);
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}
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FieldDeclarationSyntax genField = GeneratedFieldDeclaration(methodName, method.ReturnType.WithoutTrivia(), SyntaxFactory.CollectionExpression(vertical));
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MethodDeclarationSyntax genMethod = GeneratedMethodDeclaration(methodName, method.Modifiers, method.ReturnType, genField);
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models.Add(new GeneratedMarkupMethodModel(method, genField, genMethod));
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}
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catch (Exception ex)
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{
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context.AddSource(method.Identifier.ToString(), ex.ToString());
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}
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}
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context.CancellationToken.ThrowIfCancellationRequested();
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CompilationUnitSyntax compilationUnit = SyntaxFactory.CompilationUnit();
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SyntaxList<UsingDirectiveSyntax> usingDirectives = ParseUsings(DefaultUsings).ToSyntaxList();
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foreach (GeneratedMarkupMethodModel model in models)
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{
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context.CancellationToken.ThrowIfCancellationRequested();
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try
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{
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if (model.OriginalMethod.Parent is not ClassDeclarationSyntax)
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throw new MissingMemberException();
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NamespaceDeclarationSyntax genNamespace = GeneratedNamespaceDeclaration(model.OriginalMethod, [model.GeneratedField, model.GeneratedMethod]);
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compilationUnit = compilationUnit.AddMembers(genNamespace);
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}
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catch (Exception ex)
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{
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context.AddSource(model.OriginalMethod.Identifier.ToString(), ex.ToString());
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}
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}
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compilationUnit = compilationUnit.WithUsings(usingDirectives);
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context.AddSource("GeneratedKeyboards.g", compilationUnit.ToFullString());
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}
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private static MethodDeclarationSyntax GeneratedMethodDeclaration(string identifier, SyntaxTokenList modifiers, TypeSyntax returnType, FieldDeclarationSyntax field)
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{
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return SyntaxFactory.MethodDeclaration(returnType.WithTrailingTrivia(WhitespaceTrivia), identifier)
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.WithModifiers(modifiers)
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.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(SyntaxFactory.IdentifierName(field.Declaration.Variables.ElementAt(0).Identifier)))
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.WithSemicolonToken(Semicolon);
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}
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private static FieldDeclarationSyntax GeneratedFieldDeclaration(string identifier, TypeSyntax returnType, CollectionExpressionSyntax collection)
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{
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ArgumentListSyntax arguments = SyntaxFactory.ArgumentList(SeparatedSyntaxList(SyntaxFactory.Argument(collection)));
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ObjectCreationExpressionSyntax objectCreation = SyntaxFactory.ObjectCreationExpression(returnType.WithLeadingTrivia(WhitespaceTrivia), arguments, null);
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VariableDeclaratorSyntax declarator = SyntaxFactory.VariableDeclarator(identifier + "_generatedMarkup")
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.WithInitializer(SyntaxFactory.EqualsValueClause(objectCreation));
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return SyntaxFactory.FieldDeclaration(SyntaxFactory.VariableDeclaration(returnType.WithTrailingTrivia(WhitespaceTrivia)).AddVariables(declarator))
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.WithModifiers(Modifiers(SyntaxKind.PrivateKeyword, SyntaxKind.StaticKeyword, SyntaxKind.ReadOnlyKeyword));
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}
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private static ArgumentListSyntax ConvertArguments(AttributeArgumentListSyntax? attributeArgs)
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{
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if (attributeArgs == null)
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return SyntaxFactory.ArgumentList();
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return SyntaxFactory.ArgumentList(SeparatedSyntaxList(attributeArgs.Arguments.Select(CastArgument)));
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}
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private static NamespaceDeclarationSyntax GeneratedNamespaceDeclaration(MethodDeclarationSyntax method, IEnumerable<MemberDeclarationSyntax> generatedMembers)
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{
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if (method.Parent is not ClassDeclarationSyntax containerClass)
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throw new MemberAccessException();
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int times = method.CountParentTree();
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ClassDeclarationSyntax generatedContainerClass = SyntaxFactory.ClassDeclaration(containerClass.Identifier)
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.WithMembers(new SyntaxList<MemberDeclarationSyntax>(generatedMembers.Select(member => member.DecorateMember(times + 1))))
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.WithModifiers(containerClass.Modifiers.Decorate())
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.DecorateType(times);
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MemberDeclarationSyntax generated = generatedContainerClass;
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MemberDeclarationSyntax inspecting = containerClass;
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while (inspecting.Parent != null)
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{
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times -= 1;
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if (inspecting.Parent is not MemberDeclarationSyntax inspectingMember)
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break;
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inspecting = inspectingMember;
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switch (inspectingMember)
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{
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case ClassDeclarationSyntax classDeclaration:
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{
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generated = SyntaxFactory.ClassDeclaration(classDeclaration.Identifier)
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.WithMembers([generated])
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.WithModifiers(classDeclaration.Modifiers.Decorate())
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.DecorateType(times);
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break;
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}
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case StructDeclarationSyntax structDeclaration:
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{
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generated = SyntaxFactory.StructDeclaration(structDeclaration.Identifier)
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.WithMembers([generated])
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.WithModifiers(structDeclaration.Modifiers.Decorate())
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.DecorateType(times);
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break;
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}
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case NamespaceDeclarationSyntax namespaceDeclaration:
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{
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//foundNamespaceDeclaration = namespaceDeclaration;
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return SyntaxFactory.NamespaceDeclaration(namespaceDeclaration.Name)
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.WithMembers([generated]).Decorate();
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}
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}
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}
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throw new AncestorNotFoundException();
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}
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private static ArgumentSyntax CastArgument(AttributeArgumentSyntax argument)
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=> SyntaxFactory.Argument(argument.Expression).WithNameColon(argument.NameColon);
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private static SyntaxTokenList Modifiers(params SyntaxKind[] kinds)
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=> new SyntaxTokenList(kinds.Select(SyntaxFactory.Token).Select(mod => mod.WithTrailingTrivia(WhitespaceTrivia)));
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private static IEnumerable<UsingDirectiveSyntax> ParseUsings(params string[] names) => names
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.Select(name => SyntaxFactory.IdentifierName(name).WithLeadingTrivia(WhitespaceTrivia))
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.Select(name => SyntaxFactory.UsingDirective(name).WithTrailingTrivia(NewLineTrivia));
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private static bool HasGenAttributes(MethodDeclarationSyntax method) => method.AttributeLists.SelectMany(x => x.Attributes)
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.Select(x => x.Name.ToString()).Intersect(InlineAttributes.Concat(ReplyAttributes)).Any();
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private static SeparatedSyntaxList<T> SeparatedSyntaxList<T>(params IEnumerable<T> elements) where T : SyntaxNode
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=> new SeparatedSyntaxList<T>().AddRange(elements);
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private static MemberAccessExpressionSyntax AccessExpression(string className, string methodName)
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=> SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.IdentifierName(className), SyntaxFactory.IdentifierName(methodName));
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private record class GeneratedMarkupMethodModel(MethodDeclarationSyntax OriginalMethod, FieldDeclarationSyntax GeneratedField, MethodDeclarationSyntax GeneratedMethod);
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}
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}
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