Refactor RemoteConfig ConfigInfo swig generation (#961)

remote_config/CMakeLists.txt

@@ -23,6 +23,7 @@ set(firebase_remote_config_swig
 
 # Firebase RemoteConfig CSharp files
 set(firebase_remote_config_src
+  src/ConfigInfo.cs
   src/ConfigSettings.cs
   src/ConfigUpdateEventArgs.cs
   src/ConfigValue.cs

remote_config/src/ConfigInfo.cs

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+namespace Firebase.RemoteConfig {
+
+/// @brief Describes the state of the most recent Fetch() call.
+/// Normally returned as a result of the GetInfo() function.
+public sealed class ConfigInfo {
+
+  private System.DateTime UnixEpochUtc =
+      new System.DateTime(1970, 1, 1, 0, 0, 0, 0, System.DateTimeKind.Utc);
+
+  /// @brief The time when the last fetch operation completed.
+  public System.DateTime FetchTime { internal set; get; }
+
+  /// @brief The time when Remote Config data refreshes will no longer
+  /// be throttled.
+  public System.DateTime ThrottledEndTime { internal set; get; }
+
+  /// @brief The status of the last fetch request.
+  public LastFetchStatus LastFetchStatus { internal set; get; }
+
+  /// @brief The reason the most recent fetch failed.
+  public FetchFailureReason LastFetchFailureReason { internal set; get; }
+
+  internal ConfigInfo(ConfigInfoInternal configInfoInternal) {
+    FetchTime = UnixEpochUtc.AddMilliseconds(configInfoInternal.fetch_time);
+    ThrottledEndTime = UnixEpochUtc.AddMilliseconds(configInfoInternal.throttled_end_time);
+    LastFetchStatus = configInfoInternal.last_fetch_status;
+    LastFetchFailureReason = configInfoInternal.last_fetch_failure_reason;
+  }
+}
+
+}

remote_config/src/FirebaseRemoteConfig.cs

@@ -169,9 +169,10 @@ public static FirebaseRemoteConfig DefaultInstance {
     /// Use this method to ensure Set/Get call not being blocked.
     ///
     /// @returns A Task contains ConfigInfo.
-    public System.Threading.Tasks.Task<ConfigInfo> EnsureInitializedAsync() {
+    public async System.Threading.Tasks.Task<ConfigInfo> EnsureInitializedAsync() {
       ThrowIfNull();
-      return remoteConfigInternal.EnsureInitializedAsync();
+      ConfigInfoInternal configInfoInternal = await remoteConfigInternal.EnsureInitializedAsync();
+      return new ConfigInfo(configInfoInternal);
     }
 
     /// @brief Asynchronously activates the most recently fetched configs,
@@ -323,11 +324,11 @@ public IDictionary<string, ConfigValue> AllValues {
     }
 
     /// @brief Returns information about the last fetch request, in the form
-    /// of a @ref ConfigInfo struct.
+    /// of a @ref ConfigInfo object.
     public ConfigInfo Info {
       get {
         ThrowIfNull();
-        return remoteConfigInternal.GetInfo();
+        return new ConfigInfo(remoteConfigInternal.GetInfo());
       }
     }
 

remote_config/src/swig/remote_config.i

@@ -18,6 +18,9 @@
 %pragma(csharp) moduleclassmodifiers="internal sealed class"
 %feature("flatnested");
 
+// Change the default class modifier to internal, so that new classes are not accidentally exposed
+%typemap(csclassmodifiers) SWIGTYPE "internal class"
+
 %include "std_vector.i"
 %include "stdint.i"
 
@@ -116,57 +119,12 @@ void SetConfigUpdateCallback(RemoteConfig* rc, firebase::remote_config::ConfigUp
 %ignore firebase::remote_config::RemoteConfigError;
 %ignore firebase::remote_config::ConfigUpdateListenerRegistration;
 
-// Configure the ConfigInfo class
-%csmethodmodifiers fetch_time "internal";
-%rename(FetchTimeInternal) fetch_time;
-%csmethodmodifiers throttled_end_time "internal";
-%rename(ThrottledEndTimeInternal) throttled_end_time;
-
-%typemap(cscode) firebase::remote_config::ConfigInfo %{
-  private System.DateTime UnixEpochUtc =
-      new System.DateTime(1970, 1, 1, 0, 0, 0, 0, System.DateTimeKind.Utc);
-
-  /// @brief The time when the last fetch operation completed.
-  public System.DateTime FetchTime {
-    get {
-      return UnixEpochUtc.AddMilliseconds(FetchTimeInternal);
-    }
-  }
-
-  /// @brief The time when Remote Config data refreshes will no longer
-  /// be throttled.
-  public System.DateTime ThrottledEndTime {
-    get {
-      return UnixEpochUtc.AddMilliseconds(ThrottledEndTimeInternal);
-    }
-  }
-%}
-
-%immutable firebase::remote_config::ConfigInfo::last_fetch_status;
-%immutable firebase::remote_config::ConfigInfo::last_fetch_failure_reason;
-
-// These are here instead of the header due to b/35780150
-%csmethodmodifiers firebase::remote_config::ConfigInfo::last_fetch_status "
-  /// @brief The status of the last fetch request.
-  public";
-%csmethodmodifiers firebase::remote_config::ConfigInfo::last_fetch_failure_reason "
-  /// @brief The reason the most recent fetch failed.
-  public";
-
-// Make snake_case properties into CamelCase.
-// ConfigInfo
-%rename(LastFetchFailureReason) last_fetch_failure_reason;
-%rename(LastFetchStatus) last_fetch_status;
-
-%typemap(csclassmodifiers) firebase::remote_config::ConfigInfo
-  "public sealed class";
-
-%SWIG_FUTURE(Future_ConfigInfo, ConfigInfo, internal, firebase::remote_config::ConfigInfo, FirebaseException) // Future<ConfigInfo>
-
+// Rename the generated classes to *Internal
+%rename (ConfigInfoInternal) firebase::remote_config::ConfigInfo;
+%SWIG_FUTURE(Future_ConfigInfo, ConfigInfoInternal, internal,
+             firebase::remote_config::ConfigInfo, FirebaseException) // Future<ConfigInfoInternal>
 %rename (FirebaseRemoteConfigInternal) firebase::remote_config::RemoteConfig;
-
 %rename (ConfigSettingsInternal) firebase::remote_config::ConfigSettings;
-
 %rename (ConfigUpdateInternal) firebase::remote_config::ConfigUpdate;
 
 // Configure properties for get / set methods on the FirebaseRemoteConfigInternal class.