Refactor support type and operation emitters

src/OpenApiWeaver/ClientGenerator.SupportTypesEmitter.Cookie.cs

@@ -0,0 +1,30 @@
+namespace OpenApiWeaver;
+
+public sealed partial class ClientGenerator
+{
+    private static partial class SupportTypesEmitter
+    {
+        private static void EmitCookieHelpers(IndentedStringBuilder writer)
+        {
+            writer.AppendLine("internal static void AppendCookieParameter(StringBuilder builder, string name, string value)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("if (builder.Length > 0)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("builder.Append(\"; \");");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("builder.Append(name);");
+                writer.AppendLine("builder.Append('=');");
+                writer.AppendLine("builder.Append(Uri.EscapeDataString(value));");
+            }
+
+            writer.AppendLine("}");
+        }
+    }
+}

src/OpenApiWeaver/ClientGenerator.SupportTypesEmitter.Exceptions.cs

@@ -0,0 +1,71 @@
+namespace OpenApiWeaver;
+
+public sealed partial class ClientGenerator
+{
+    private static partial class SupportTypesEmitter
+    {
+        private static void EmitExceptionTypes(IndentedStringBuilder writer)
+        {
+            writer.Append("public class ").Append(SupportTypeNames.Exception).AppendLine(" : Exception");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.Append("public ").Append(SupportTypeNames.Exception).AppendLine("(int statusCode, string? reasonPhrase, string? contentType, string? responseContent, Exception? innerException = null)");
+                writer.AppendLine(": base(CreateMessage(statusCode, reasonPhrase), innerException)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("StatusCode = statusCode;");
+                    writer.AppendLine("ReasonPhrase = reasonPhrase;");
+                    writer.AppendLine("ContentType = contentType;");
+                    writer.AppendLine("ResponseContent = responseContent;");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("public int StatusCode { get; }");
+                writer.AppendLine();
+                writer.AppendLine("public string? ReasonPhrase { get; }");
+                writer.AppendLine();
+                writer.AppendLine("public string? ContentType { get; }");
+                writer.AppendLine();
+                writer.AppendLine("public string? ResponseContent { get; }");
+                writer.AppendLine();
+                writer.AppendLine("private static string CreateMessage(int statusCode, string? reasonPhrase)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("return string.IsNullOrWhiteSpace(reasonPhrase)");
+                    using (writer.PushIndent())
+                    {
+                        writer.AppendLine("? $\"The HTTP request failed with status code {statusCode}.\"");
+                        writer.AppendLine(": $\"The HTTP request failed with status code {statusCode} ({reasonPhrase}).\";");
+                    }
+                }
+
+                writer.AppendLine("}");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.Append("public class ").Append(SupportTypeNames.Exception).Append("<TError> : ").Append(SupportTypeNames.Exception).AppendLine();
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.Append("public ").Append(SupportTypeNames.Exception).AppendLine("(int statusCode, string? reasonPhrase, string? contentType, string? responseContent, TError? error, Exception? innerException = null)");
+                writer.AppendLine(": base(statusCode, reasonPhrase, contentType, responseContent, innerException)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("Error = error;");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("public TError? Error { get; }");
+            }
+
+            writer.AppendLine("}");
+        }
+    }
+}

src/OpenApiWeaver/ClientGenerator.SupportTypesEmitter.Helpers.cs

@@ -0,0 +1,28 @@
+namespace OpenApiWeaver;
+
+public sealed partial class ClientGenerator
+{
+    private static partial class SupportTypesEmitter
+    {
+        private static void EmitHelperClass(IndentedStringBuilder writer)
+        {
+            writer.Append("internal static class ").Append(SupportTypeNames.ClientHelpers).AppendLine();
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.Append("internal static readonly JsonSerializerOptions ").Append(SupportTypeNames.SerializerOptions).AppendLine(" = new(JsonSerializerDefaults.Web);");
+                writer.AppendLine();
+
+                EmitParameterFormattingHelpers(writer);
+                writer.AppendLine();
+                EmitQueryHelpers(writer);
+                writer.AppendLine();
+                EmitCookieHelpers(writer);
+                writer.AppendLine();
+                EmitResponseHelpers(writer);
+            }
+
+            writer.AppendLine("}");
+        }
+    }
+}

src/OpenApiWeaver/ClientGenerator.SupportTypesEmitter.ParameterFormatting.cs

@@ -0,0 +1,79 @@
+namespace OpenApiWeaver;
+
+public sealed partial class ClientGenerator
+{
+    private static partial class SupportTypesEmitter
+    {
+        private static void EmitParameterFormattingHelpers(IndentedStringBuilder writer)
+        {
+            writer.AppendLine("internal static string FormatParameter(string? value) => value ?? string.Empty;");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatParameter(JsonElement value) => value.ToString();");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatParameter(bool value) => value ? \"true\" : \"false\";");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatParameter(bool? value) => value is bool actual ? (actual ? \"true\" : \"false\") : string.Empty;");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatParameter<T>(T value) where T : struct, IFormattable");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("return FormatFormattable(value);");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatParameter<T>(T? value) where T : struct, IFormattable");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("return value is T actual ? FormatFormattable(actual) : string.Empty;");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatParameter(object? value)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("return value switch");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("null => string.Empty,");
+                    writer.AppendLine("bool boolean => boolean ? \"true\" : \"false\",");
+                    writer.AppendLine("DateTimeOffset dateTimeOffset => dateTimeOffset.ToString(\"o\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("DateTime dateTime => dateTime.ToString(\"o\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("DateOnly dateOnly => dateOnly.ToString(\"yyyy-MM-dd\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("TimeOnly timeOnly => timeOnly.ToString(\"HH:mm:ss.FFFFFFF\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("IFormattable formattable => formattable.ToString(null, CultureInfo.InvariantCulture),");
+                    writer.AppendLine("_ => value.ToString() ?? string.Empty");
+                }
+
+                writer.AppendLine("};");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("private static string FormatFormattable<T>(T value) where T : struct, IFormattable");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("return value switch");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("DateTimeOffset dateTimeOffset => dateTimeOffset.ToString(\"o\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("DateTime dateTime => dateTime.ToString(\"o\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("DateOnly dateOnly => dateOnly.ToString(\"yyyy-MM-dd\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("TimeOnly timeOnly => timeOnly.ToString(\"HH:mm:ss.FFFFFFF\", CultureInfo.InvariantCulture),");
+                    writer.AppendLine("_ => value.ToString(null, CultureInfo.InvariantCulture)");
+                }
+
+                writer.AppendLine("};");
+            }
+
+            writer.AppendLine("}");
+        }
+    }
+}

src/OpenApiWeaver/ClientGenerator.SupportTypesEmitter.Query.cs

@@ -0,0 +1,76 @@
+namespace OpenApiWeaver;
+
+public sealed partial class ClientGenerator
+{
+    private static partial class SupportTypesEmitter
+    {
+        private static void EmitQueryHelpers(IndentedStringBuilder writer)
+        {
+            writer.AppendLine("internal static void AppendQueryParameter(StringBuilder builder, ref bool hasQuery, string name, string value)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("builder.Append(hasQuery ? '&' : '?');");
+                writer.AppendLine("hasQuery = true;");
+                writer.AppendLine("builder.Append(name);");
+                writer.AppendLine("builder.Append('=');");
+                writer.AppendLine("builder.Append(Uri.EscapeDataString(value));");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static void AppendQueryParameters<T>(StringBuilder builder, ref bool hasQuery, string name, IEnumerable<T> values)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("foreach (var value in values)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("AppendQueryParameter(builder, ref hasQuery, name, FormatParameter(value));");
+                }
+
+                writer.AppendLine("}");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static string FormatCollectionParameter<T>(IEnumerable<T>? values)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("if (values is null)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("return string.Empty;");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("var builder = new StringBuilder();");
+                writer.AppendLine("foreach (var value in values)");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("if (builder.Length > 0)");
+                    writer.AppendLine("{");
+                    using (writer.PushIndent())
+                    {
+                        writer.AppendLine("builder.Append(',');");
+                    }
+
+                    writer.AppendLine("}");
+                    writer.AppendLine();
+                    writer.AppendLine("builder.Append(FormatParameter(value));");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("return builder.ToString();");
+            }
+
+            writer.AppendLine("}");
+        }
+    }
+}

src/OpenApiWeaver/ClientGenerator.SupportTypesEmitter.Response.cs

@@ -0,0 +1,77 @@
+namespace OpenApiWeaver;
+
+public sealed partial class ClientGenerator
+{
+    private static partial class SupportTypesEmitter
+    {
+        private static void EmitResponseHelpers(IndentedStringBuilder writer)
+        {
+            writer.AppendLine("internal static bool HasJsonContentType(string? contentType)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("return !string.IsNullOrWhiteSpace(contentType) && contentType.Contains(\"json\", StringComparison.OrdinalIgnoreCase);");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static bool ResponseMatchesStatusCode(int statusCode, string statusCodePattern)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("if (string.Equals(statusCodePattern, \"default\", StringComparison.OrdinalIgnoreCase))");
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("return true;");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("if (statusCodePattern.Length == 3");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("&& char.IsDigit(statusCodePattern[0])");
+                    writer.AppendLine("&& statusCodePattern[1] is 'X' or 'x'");
+                    writer.AppendLine("&& statusCodePattern[2] is 'X' or 'x')");
+                }
+
+                writer.AppendLine("{");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("var prefix = statusCodePattern[0] - '0';");
+                    writer.AppendLine("return statusCode >= prefix * 100 && statusCode < (prefix + 1) * 100;");
+                }
+
+                writer.AppendLine("}");
+                writer.AppendLine();
+                writer.AppendLine("return int.TryParse(statusCodePattern, out var expectedStatusCode) && statusCode == expectedStatusCode;");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static T? DeserializeResponseContent<T>(string? responseContent)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.Append("return DeserializeResponseContent<T>(responseContent, ").Append(SupportTypeNames.SerializerOptions).AppendLine(");");
+            }
+
+            writer.AppendLine("}");
+            writer.AppendLine();
+            writer.AppendLine("internal static T? DeserializeResponseContent<T>(string? responseContent, JsonSerializerOptions options)");
+            writer.AppendLine("{");
+            using (writer.PushIndent())
+            {
+                writer.AppendLine("return string.IsNullOrWhiteSpace(responseContent)");
+                using (writer.PushIndent())
+                {
+                    writer.AppendLine("? default");
+                    writer.AppendLine(": JsonSerializer.Deserialize<T>(responseContent, options);");
+                }
+            }
+
+            writer.AppendLine("}");
+        }
+    }
+}