make use of new language features

src/Refitter.Core/ParameterExtractor.cs

@@ -58,12 +58,11 @@ public static IEnumerable<string> GetParameters(
 
     private static string GetQueryAttribute(CSharpParameterModel p)
     {
-        if (p.IsArray)
-            return "Query(CollectionFormat.Multi)";
-        else
+        return p switch
         {
-            return "Query";
-        }
+            { IsArray: true } => "Query(CollectionFormat.Multi)",
+            _ => "Query",
+        };
     }
 
     private static string GetAliasAsAttribute(CSharpParameterModel parameterModel) =>

src/Refitter.Core/RefitGenerator.cs

@@ -1,87 +1,90 @@
-using System.Linq;
+using NSwag;
+using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
-using NSwag;
 
-namespace Refitter.Core
+namespace Refitter.Core;
+
+public class RefitGenerator
 {
-    public class RefitGenerator
+    private readonly RefitGeneratorSettings settings;
+    private readonly OpenApiDocument document;
+    private readonly CSharpClientGeneratorFactory factory;
+
+    private RefitGenerator(RefitGeneratorSettings settings, OpenApiDocument document)
     {
-        private readonly RefitGeneratorSettings settings;
-        private readonly OpenApiDocument document;
-        private readonly CSharpClientGeneratorFactory factory;
+        this.settings = settings;
+        this.document = document;
+        factory = new CSharpClientGeneratorFactory(settings, document);
+    }
 
-        private RefitGenerator(RefitGeneratorSettings settings, OpenApiDocument document)
-        {
-            this.settings = settings;
-            this.document = document;
-            factory = new CSharpClientGeneratorFactory(settings, document);
-        }
+    public static async Task<RefitGenerator> CreateAsync(RefitGeneratorSettings settings)
+    {
+        if (IsHttp(settings.OpenApiPath) && IsYaml(settings.OpenApiPath))
+            return new RefitGenerator(settings, await OpenApiYamlDocument.FromUrlAsync(settings.OpenApiPath));
+        if (IsHttp(settings.OpenApiPath))
+            return new RefitGenerator(settings, await OpenApiDocument.FromUrlAsync(settings.OpenApiPath));
+        if (IsYaml(settings.OpenApiPath))
+            return new RefitGenerator(settings, await OpenApiYamlDocument.FromFileAsync(settings.OpenApiPath));
+        return new RefitGenerator(settings, await OpenApiDocument.FromFileAsync(settings.OpenApiPath));
+    }
 
-        public static async Task<RefitGenerator> CreateAsync(RefitGeneratorSettings settings)
-        {
-            if (IsHttp(settings.OpenApiPath) && IsYaml(settings.OpenApiPath))
-                return new RefitGenerator(settings, await OpenApiYamlDocument.FromUrlAsync(settings.OpenApiPath));
-            if (IsHttp(settings.OpenApiPath))
-                return new RefitGenerator(settings, await OpenApiDocument.FromUrlAsync(settings.OpenApiPath));
-            if (IsYaml(settings.OpenApiPath))
-                return new RefitGenerator(settings, await OpenApiYamlDocument.FromFileAsync(settings.OpenApiPath));
-            return new RefitGenerator(settings, await OpenApiDocument.FromFileAsync(settings.OpenApiPath));
-        }
+    public string Generate()
+    {
+        var generator = factory.Create();
+        var contracts = RefitInterfaceImports
+            .GetImportedNamespaces(settings)
+            .Aggregate(
+                generator.GenerateFile(),
+                (current, import) => current.Replace($"{import}.", string.Empty));
 
-        public string Generate()
-        {
-            var generator = factory.Create();
-            var contracts = RefitInterfaceImports
-                .GetImportedNamespaces(settings)
-                .Aggregate(
-                    generator.GenerateFile(),
-                    (current, import) => current.Replace($"{import}.", string.Empty));
+        var interfaceGenerator = new RefitInterfaceGenerator(settings, document, generator);
+        var client = GenerateClient(interfaceGenerator);
 
-            var interfaceGenerator = new RefitInterfaceGenerator(settings, document, generator);
-            var client = GenerateClient(interfaceGenerator);
+        return new StringBuilder()
+            .AppendLine(client)
+            .AppendLine()
+            .AppendLine(settings.GenerateContracts ? contracts : string.Empty)
+            .ToString();
+    }
 
-            return new StringBuilder()
-                .AppendLine(client)
-                .AppendLine()
-                .AppendLine(settings.GenerateContracts ? contracts : string.Empty)
-                .ToString();
-        }
+    private string GenerateClient(RefitInterfaceGenerator interfaceGenerator)
+    {
+        var code = new StringBuilder();
+        GenerateAutoGeneratedHeader(code);
+        code.AppendLine(RefitInterfaceImports.GenerateNamespaceImports(settings))
+            .AppendLine();
 
-        private string GenerateClient(RefitInterfaceGenerator interfaceGenerator)
-        {
-            var code = new StringBuilder();
-            GenerateAutoGeneratedHeader(code);
-            code.AppendLine(RefitInterfaceImports.GenerateNamespaceImports(settings))
-                .AppendLine();
+        code.AppendLine($$"""
+            namespace {{settings.Namespace}}
+            {
+            {{interfaceGenerator.GenerateRefitInterface()}}
+            }
+            """);
 
-            code.AppendLine("namespace " + settings.Namespace)
-                .AppendLine("{")
-                .AppendLine(interfaceGenerator.GenerateRefitInterface())
-                .AppendLine("}");
+        return code.ToString();
+    }
 
-            return code.ToString();
-        }
+    private void GenerateAutoGeneratedHeader(StringBuilder code)
+    {
+        if (!settings.AddAutoGeneratedHeader)
+            return;
 
-        private void GenerateAutoGeneratedHeader(StringBuilder code)
-        {
-            if (!settings.AddAutoGeneratedHeader)
-                return;
+        code.AppendLine("""
+            // <auto-generated>
+            //     This code was generated by Refitter.
+            // </auto-generated>
 
-            code.AppendLine("// <auto-generated>")
-                .AppendLine("//     This code was generated by Refitter.")
-                .AppendLine("// </auto-generated>")
-                .AppendLine();
-        }
+            """);
+    }
 
-        private static bool IsHttp(string path)
-        {
-            return path.StartsWith("http://") || path.StartsWith("https://");
-        }
+    private static bool IsHttp(string path)
+    {
+        return path.StartsWith("http://") || path.StartsWith("https://");
+    }
 
-        private static bool IsYaml(string path)
-        {
-            return path.EndsWith("yaml") || path.EndsWith("yml");
-        }
+    private static bool IsYaml(string path)
+    {
+        return path.EndsWith("yaml") || path.EndsWith("yml");
     }
 }

src/Refitter.Core/RefitGeneratorSettings.cs

@@ -1,44 +1,41 @@
-using System.ComponentModel;
-using System.Diagnostics.CodeAnalysis;
-using System.Runtime.Serialization;
+using System.Diagnostics.CodeAnalysis;
 
-namespace Refitter.Core
+namespace Refitter.Core;
+
+[ExcludeFromCodeCoverage]
+public class RefitGeneratorSettings
 {
-    [ExcludeFromCodeCoverage]
-    public class RefitGeneratorSettings
-    {
-        public string OpenApiPath { get; set; } = null!;
+    public string OpenApiPath { get; set; } = null!;
+
+    public string Namespace { get; set; } = "GeneratedCode";
 
-        public string Namespace { get; set; } = "GeneratedCode";
+    public NamingSettings Naming { get; set; } = new();
 
-        public NamingSettings Naming { get; set; } = new();
+    public bool GenerateContracts { get; set; } = true;
 
-        public bool GenerateContracts { get; set; } = true;
+    public bool GenerateXmlDocCodeComments { get; set; } = true;
 
-        public bool GenerateXmlDocCodeComments { get; set; } = true;
+    public bool AddAutoGeneratedHeader { get; set; } = true;
 
-        public bool AddAutoGeneratedHeader { get; set; } = true;
+    public bool ReturnIApiResponse { get; set; }
 
-        public bool ReturnIApiResponse { get; set; }
-
-        public bool GenerateOperationHeaders { get; set; } = true;
+    public bool GenerateOperationHeaders { get; set; } = true;
 
-        public TypeAccessibility TypeAccessibility { get; set; } = TypeAccessibility.Public;
+    public TypeAccessibility TypeAccessibility { get; set; } = TypeAccessibility.Public;
 
-        public bool UseCancellationTokens { get; set; }
-    }
+    public bool UseCancellationTokens { get; set; }
+}
 
-    [ExcludeFromCodeCoverage]
-    public class NamingSettings
-    {
-        public bool UseOpenApiTitle { get; set; } = true;
+[ExcludeFromCodeCoverage]
+public class NamingSettings
+{
+    public bool UseOpenApiTitle { get; set; } = true;
 
-        public string InterfaceName { get; set; } = "ApiClient";
-    }
+    public string InterfaceName { get; set; } = "ApiClient";
+}
 
-    public enum TypeAccessibility
-    {
-        Public,
-        Internal
-    }
+public enum TypeAccessibility
+{
+    Public,
+    Internal
 }

src/Refitter.Core/RefitInterfaceGenerator.cs

@@ -1,6 +1,6 @@
+using NSwag;
 using System;
 using System.Text;
-using NSwag;
 
 namespace Refitter.Core;
 
@@ -25,10 +25,12 @@ public RefitInterfaceGenerator(
 
     public string GenerateRefitInterface()
     {
-        var code = new StringBuilder();
-        code.AppendLine(GenerateInterfaceDeclaration());
-        code.AppendLine(GenerateInterfaceBody());
-        return code.ToString();
+        return $$"""
+                {{GenerateInterfaceDeclaration()}}
+                {{Separator}}{
+                {{GenerateInterfaceBody()}}
+                {{Separator}}}
+                """;
     }
 
     private string GenerateInterfaceBody()
@@ -68,7 +70,6 @@ private string GenerateInterfaceBody()
             }
         }
 
-        code.AppendLine($"{Separator}}}");
         return code.ToString();
     }
 
@@ -112,10 +113,7 @@ private string GenerateInterfaceDeclaration()
               "ApiClient"
             : settings.Naming.InterfaceName;
 
-        var code = new StringBuilder();
         var modifier = settings.TypeAccessibility.ToString().ToLowerInvariant();
-        code.AppendLine($"{Separator}{modifier} interface I{title.CapitalizeFirstCharacter()}")
-            .AppendLine($"{Separator}{{");
-        return code.ToString();
+        return $"{Separator}{modifier} interface I{title.CapitalizeFirstCharacter()}";
     }
 }