Added an analyzer for static and const field naming

app/SourceCodeRules/SourceCodeRules/AnalyzerReleases.Shipped.md

@@ -5,3 +5,4 @@
  Rule ID   | Category | Severity | Notes                  
 -----------|----------|----------|------------------------
  MWAIS0001 | Usage    | Error    | ProviderAccessAnalyzer
+ MWAIS0002 | Naming | Error | ConstStaticAnalyzer

app/SourceCodeRules/SourceCodeRules/NamingAnalyzers/ConstStaticAnalyzer.cs

@@ -0,0 +1,67 @@
+using System.Collections.Immutable;
+using System.Linq;
+
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CSharp;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Diagnostics;
+
+namespace SourceCodeRules.NamingAnalyzers;
+
+#pragma warning disable RS1038
+[DiagnosticAnalyzer(LanguageNames.CSharp)]
+#pragma warning restore RS1038
+public sealed class ConstStaticAnalyzer : DiagnosticAnalyzer
+{
+    private const string DIAGNOSTIC_ID = $"{Tools.ID_PREFIX}0002";
+    
+    private static readonly string TITLE = "Constant and static fields must be in UPPER_CASE";
+    
+    private static readonly string MESSAGE_FORMAT = "Field '{0}' must be in UPPER_CASE";
+    
+    private static readonly string DESCRIPTION = "All constant and static fields should be named using UPPER_CASE.";
+    
+    private const string CATEGORY = "Naming";
+    
+    private static readonly DiagnosticDescriptor RULE = new(DIAGNOSTIC_ID, TITLE, MESSAGE_FORMAT, CATEGORY, DiagnosticSeverity.Error, isEnabledByDefault: true, description: DESCRIPTION);
+    
+    public override ImmutableArray<DiagnosticDescriptor> SupportedDiagnostics => [RULE];
+    
+    public override void Initialize(AnalysisContext context)
+    {
+        context.ConfigureGeneratedCodeAnalysis(GeneratedCodeAnalysisFlags.None);
+        context.EnableConcurrentExecution();
+        context.RegisterSyntaxNodeAction(this.AnalyzeField, SyntaxKind.FieldDeclaration);
+    }
+    
+    private void AnalyzeField(SyntaxNodeAnalysisContext context)
+    {
+        var fieldDeclaration = (FieldDeclarationSyntax)context.Node;
+        
+        // Prüfen ob das Feld static oder const ist
+        if (!fieldDeclaration.Modifiers.Any(m => m.IsKind(SyntaxKind.StaticKeyword) || m.IsKind(SyntaxKind.ConstKeyword)))
+            return;
+        
+        foreach (var variable in fieldDeclaration.Declaration.Variables)
+        {
+            var fieldName = variable.Identifier.Text;
+            
+            // Prüfen ob der Name bereits in UPPER_CASE ist
+            if (!IsUpperCase(fieldName))
+            {
+                var diagnostic = Diagnostic.Create(
+                    RULE,
+                    variable.Identifier.GetLocation(),
+                    fieldName);
+                
+                context.ReportDiagnostic(diagnostic);
+            }
+        }
+    }
+    
+    private static bool IsUpperCase(string name)
+    {
+        // Erlaubt: Nur Großbuchstaben, Zahlen und Unterstriche
+        return name.All(c => char.IsUpper(c) || char.IsDigit(c) || c == '_');
+    }
+}

app/SourceCodeRules/SourceCodeRules/NamingCodeFixes/ConstStaticCodeFixProvider.cs

@@ -0,0 +1,67 @@
+using System.Collections.Immutable;
+using System.Composition;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.CodeActions;
+using Microsoft.CodeAnalysis.CodeFixes;
+using Microsoft.CodeAnalysis.CSharp.Syntax;
+using Microsoft.CodeAnalysis.Rename;
+
+namespace SourceCodeRules.NamingCodeFixes;
+
+[ExportCodeFixProvider(LanguageNames.CSharp, Name = nameof(ConstStaticCodeFixProvider)), Shared]
+public sealed class ConstStaticCodeFixProvider : CodeFixProvider
+{
+    public override ImmutableArray<string> FixableDiagnosticIds => [$"{Tools.ID_PREFIX}0002"];
+    
+    public override FixAllProvider GetFixAllProvider() => WellKnownFixAllProviders.BatchFixer;
+    
+    public override async Task RegisterCodeFixesAsync(CodeFixContext context)
+    {
+        var root = await context.Document.GetSyntaxRootAsync(context.CancellationToken);
+        var diagnostic = context.Diagnostics.First();
+        var diagnosticSpan = diagnostic.Location.SourceSpan;
+        var declaration = root?.FindToken(diagnosticSpan.Start).Parent?.AncestorsAndSelf().OfType<VariableDeclaratorSyntax>().First();
+        if (declaration is null)
+            return;
+        
+        context.RegisterCodeFix(CodeAction.Create(title: "Convert to UPPER_CASE", createChangedDocument: c => this.ConvertToUpperCaseAsync(context.Document, declaration, c), equivalenceKey: nameof(ConstStaticCodeFixProvider)), diagnostic);
+    }
+    
+    private async Task<Document> ConvertToUpperCaseAsync(Document document, VariableDeclaratorSyntax declarator, CancellationToken cancellationToken)
+    {
+        var oldName = declarator.Identifier.Text;
+        var newName = ConvertToUpperCase(oldName);
+        
+        var semanticModel = await document.GetSemanticModelAsync(cancellationToken);
+        var symbol = semanticModel?.GetDeclaredSymbol(declarator, cancellationToken);
+        if (symbol is null)
+            return document;
+
+        var solution = document.Project.Solution;
+        var newSolution = await Renamer.RenameSymbolAsync(solution, symbol, new SymbolRenameOptions(), newName, cancellationToken);
+        
+        return newSolution.GetDocument(document.Id) ?? document;
+    }
+    
+    private static string ConvertToUpperCase(string name)
+    {
+        var result = new StringBuilder();
+        for (var i = 0; i < name.Length; i++)
+        {
+            var current = name[i];
+            
+            // Insert an underscore before each uppercase letter, except the first one:
+            if (i > 0 && char.IsUpper(current) && !char.IsUpper(name[i - 1]))
+                result.Append('_');
+            
+            result.Append(char.ToUpper(current));
+        }
+        
+        return result.ToString();
+    }
+}