Add iOS support for TapADN package

DirichletMediation/Runtime/DirichletMediationSdk.cs

@@ -580,12 +580,12 @@ namespace Dirichlet.Mediation
 
         /// <summary>
         /// Shows a reward video ad with automatic load-and-show logic.
-        /// Android only - iOS will call onFailure with not_supported error.
+        /// Android bridge maps to native auto cache; higher layers may emulate load-then-show elsewhere.
         /// </summary>
         void ShowRewardVideoAutoAd(DirichletAdRequest request, IDirichletRewardVideoAutoAdListener listener);
 
         /// <summary>
-        /// Shows an interstitial ad with automatic load-and-show logic. Android only.
+        /// Shows an interstitial ad with automatic load-and-show logic. Android bridge maps to native auto cache.
         /// </summary>
         void ShowInterstitialAutoAd(DirichletAdRequest request, IDirichletInterstitialAutoAdListener listener);
 
@@ -595,7 +595,7 @@ namespace Dirichlet.Mediation
         void ShowBannerAutoAd(DirichletAdRequest request, DirichletAdShowOptions options, IDirichletBannerAutoAdListener listener);
 
         /// <summary>
-        /// Shows a splash ad with automatic load logic. Android only.
+        /// Shows a splash ad with automatic load logic. Android bridge maps to native auto cache.
         /// </summary>
         void ShowSplashAutoAd(DirichletAdRequest request, DirichletAdShowOptions options, IDirichletSplashAutoAdListener listener);
 
@@ -1563,20 +1563,9 @@ namespace Dirichlet.Mediation
                     }
                     first = false;
 
-                    jsonBuilder.Append($"\"{kv.Key}\":");
-
-                    if (kv.Value is string)
-                    {
-                        jsonBuilder.Append($"\"{kv.Value}\"");
-                    }
-                    else if (kv.Value is bool)
-                    {
-                        jsonBuilder.Append(((bool)kv.Value) ? "true" : "false");
-                    }
-                    else
-                    {
-                        jsonBuilder.Append(kv.Value.ToString());
-                    }
+                    AppendJsonString(jsonBuilder, kv.Key);
+                    jsonBuilder.Append(":");
+                    AppendJsonValue(jsonBuilder, kv.Value);
                 }
 
                 jsonBuilder.Append("}");
@@ -1589,6 +1578,84 @@ namespace Dirichlet.Mediation
             }
         }
 
+        private static void AppendJsonValue(System.Text.StringBuilder builder, object value)
+        {
+            if (value == null)
+            {
+                builder.Append("null");
+                return;
+            }
+
+            if (value is string stringValue)
+            {
+                AppendJsonString(builder, stringValue);
+                return;
+            }
+
+            if (value is bool boolValue)
+            {
+                builder.Append(boolValue ? "true" : "false");
+                return;
+            }
+
+            if (value is IFormattable formattable)
+            {
+                builder.Append(formattable.ToString(null, CultureInfo.InvariantCulture));
+                return;
+            }
+
+            AppendJsonString(builder, value.ToString());
+        }
+
+        private static void AppendJsonString(System.Text.StringBuilder builder, string value)
+        {
+            builder.Append('"');
+
+            if (!string.IsNullOrEmpty(value))
+            {
+                foreach (var c in value)
+                {
+                    switch (c)
+                    {
+                        case '\\':
+                            builder.Append("\\\\");
+                            break;
+                        case '"':
+                            builder.Append("\\\"");
+                            break;
+                        case '\b':
+                            builder.Append("\\b");
+                            break;
+                        case '\f':
+                            builder.Append("\\f");
+                            break;
+                        case '\n':
+                            builder.Append("\\n");
+                            break;
+                        case '\r':
+                            builder.Append("\\r");
+                            break;
+                        case '\t':
+                            builder.Append("\\t");
+                            break;
+                        default:
+                            if (char.IsControl(c))
+                            {
+                                builder.Append("\\u");
+                                builder.Append(((int)c).ToString("x4", CultureInfo.InvariantCulture));
+                            }
+                            else
+                            {
+                                builder.Append(c);
+                            }
+                            break;
+                    }
+                }
+            }
+
+            builder.Append('"');
+        }
+
         private void RemoveLoadCallback(string handleId)
         {
             if (string.IsNullOrEmpty(handleId))
@@ -2032,5 +2099,3 @@ namespace Dirichlet.Mediation
 
     #endregion
 }
-
-