feat: improve OpenApiAnyExtensions to handle more types

Author: davidkallesen

src/Atc.Rest.ApiGenerator.OpenApi/Extensions/OpenApiAnyExtensions.cs

@@ -2,6 +2,17 @@ namespace Atc.Rest.ApiGenerator.OpenApi.Extensions;
 
 public static class OpenApiAnyExtensions
 {
+    /// <summary>
+    /// Returns a string representation of common OpenAPI primitives with predictable, culture-fixed formatting.
+    /// Notes:
+    ///  - Booleans -> "true"/"false" (lowercase JSON style).
+    ///  - Date -> "yyyy-MM-dd" (e.g., 2025-09-03), culture-fixed to avoid month/day swaps.
+    ///  - DateTime -> ISO 8601 round-trip "O" (e.g., 2025-09-03T12:34:56.7890123+00:00).
+    ///  - Double/Float -> "N" using en-US (group separators + decimals; e.g., 1,234.00).
+    ///  - Long/Integer -> default numeric ("G") with en-US (no group separators, no decimals; e.g., 1234).
+    ///  - Null -> "null" literal.
+    ///  - String/Password -> empty -> "string.Empty"; otherwise the raw value (unquoted).
+    /// </summary>
     public static string? GetDefaultValueAsString(
         this IOpenApiAny? openApiAny)
     {
@@ -12,12 +23,17 @@ public static class OpenApiAnyExtensions
 
         return openApiAny switch
         {
-            OpenApiDouble apiDouble => apiDouble.Value.ToString("N"),
-            OpenApiFloat apiFloat => apiFloat.Value.ToString("N"),
-            OpenApiInteger apiInteger => apiInteger.Value.ToString(),
-            OpenApiString apiString => string.IsNullOrEmpty(apiString.Value) ? "string.Empty" : $"{apiString.Value}",
             OpenApiBoolean { Value: true } => "true",
             OpenApiBoolean { Value: false } => "false",
+            OpenApiDate apiDate => apiDate.Value.ToString("yyyy-MM-dd", GlobalizationConstants.EnglishCultureInfo),
+            OpenApiDateTime apiDateTime => apiDateTime.Value.ToString("O", GlobalizationConstants.EnglishCultureInfo),
+            OpenApiDouble apiDouble => apiDouble.Value.ToString("N", GlobalizationConstants.EnglishCultureInfo),
+            OpenApiFloat apiFloat => apiFloat.Value.ToString("N", GlobalizationConstants.EnglishCultureInfo),
+            OpenApiLong apiLong => apiLong.Value.ToString(GlobalizationConstants.EnglishCultureInfo),
+            OpenApiInteger apiInteger => apiInteger.Value.ToString(GlobalizationConstants.EnglishCultureInfo),
+            OpenApiNull => "null",
+            OpenApiPassword apiPassword => string.IsNullOrEmpty(apiPassword.Value) ? "string.Empty" : $"{apiPassword.Value}",
+            OpenApiString apiString => string.IsNullOrEmpty(apiString.Value) ? "string.Empty" : $"{apiString.Value}",
             _ => throw new NotImplementedException("Property initializer: " + openApiAny.GetType()),
         };
     }