feat(remote-config): support for custom signals

packages/remote-config/__tests__/remote-config.test.ts

@@ -39,6 +39,7 @@ import {
   setDefaults,
   setDefaultsFromResource,
   onConfigUpdated,
+  setCustomSignals,
 } from '../lib';
 
 describe('remoteConfig()', function () {
@@ -216,5 +217,9 @@ describe('remoteConfig()', function () {
     it('`onConfigUpdated` function is properly exposed to end user', function () {
       expect(onConfigUpdated).toBeDefined();
     });
+
+    it('`setCustomSignals` function is properly exposed to end user', function () {
+      expect(setCustomSignals).toBeDefined();
+    });
   });
 });

packages/remote-config/android/src/main/java/io/invertase/firebase/config/UniversalFirebaseConfigModule.java

@@ -25,8 +25,10 @@
 import android.content.res.XmlResourceParser;
 import android.os.Bundle;
 import com.google.android.gms.tasks.Task;
+import com.google.android.gms.tasks.TaskCompletionSource;
 import com.google.android.gms.tasks.Tasks;
 import com.google.firebase.FirebaseApp;
+import com.google.firebase.remoteconfig.CustomSignals;
 import com.google.firebase.remoteconfig.FirebaseRemoteConfig;
 import com.google.firebase.remoteconfig.FirebaseRemoteConfigInfo;
 import com.google.firebase.remoteconfig.FirebaseRemoteConfigSettings;
@@ -199,6 +201,40 @@ private Bundle convertRemoteConfigValue(FirebaseRemoteConfigValue value) {
     return convertedConfigBundle;
   }
 
+  Task<Void> setCustomSignals(String appName, HashMap<String, Object> customSignalsMap) {
+    TaskCompletionSource<Void> taskCompletionSource = new TaskCompletionSource<>();
+
+    FirebaseApp firebaseApp = FirebaseApp.getInstance(appName);
+
+    getExecutor().execute(
+      () -> {
+        try {
+          CustomSignals.Builder customSignals = new CustomSignals.Builder();
+          for (Map.Entry<String, Object> entry : customSignalsMap.entrySet()) {
+            Object value = entry.getValue();
+            if (value instanceof String) {
+              customSignals.put(entry.getKey(), (String) value);
+            } else if (value instanceof Long) {
+              customSignals.put(entry.getKey(), (Long) value);
+            } else if (value instanceof Integer) {
+              customSignals.put(entry.getKey(), ((Integer) value).longValue());
+            } else if (value instanceof Double) {
+              customSignals.put(entry.getKey(), (Double) value);
+            } else if (value == null) {
+              customSignals.put(entry.getKey(), null);
+            }
+          }
+
+          Tasks.await(FirebaseRemoteConfig.getInstance(firebaseApp).setCustomSignals(customSignals.build()));
+          taskCompletionSource.setResult(null);
+        } catch (Exception e) {
+          taskCompletionSource.setException(e);
+        }
+      });
+
+    return taskCompletionSource.getTask();
+  }
+
   public Map<String, Object> getConstantsForApp(String appName) {
     Map<String, Object> appConstants = new HashMap<>();
     FirebaseRemoteConfigInfo remoteConfigInfo =

packages/remote-config/android/src/reactnative/java/io/invertase/firebase/config/ReactNativeFirebaseConfigModule.java

@@ -255,6 +255,20 @@ public void removeConfigUpdateRegistration(String appName) {
     }
   }
 
+  @ReactMethod
+  public void setCustomSignals(String appName, ReadableMap setCustomSignals, Promise promise) {
+    module
+      .setCustomSignals(appName, setCustomSignals.toHashMap())
+      .addOnCompleteListener(
+        task -> {
+          if (task.isSuccessful()) {
+            promise.resolve(resultWithConstants(task.getResult()));
+          } else {
+            rejectPromiseWithExceptionMap(promise, task.getException());
+          }
+        });
+  }
+
   private WritableMap resultWithConstants(Object result) {
     Map<String, Object> responseMap = new HashMap<>(2);
     responseMap.put("result", result);

packages/remote-config/e2e/config.e2e.js

@@ -954,5 +954,46 @@ describe('remoteConfig()', function () {
         // console.log('checking listener functionality across javascript layer reload');
       });
     });
+
+    describe('setCustomSignals()', function () {
+      it('should resolve with valid signal value; `string`, `number` or `null`', async function () {
+        const { setCustomSignals, getRemoteConfig } = remoteConfigModular;
+        const remoteConfig = getRemoteConfig(firebase.app());
+        // native SDKs just ignore invalid key/values (e.g. too long) and just log warning
+        const signals = {
+          string: 'string',
+          number: 123,
+          double: 123.456,
+          null: null,
+        };
+
+        const result = await setCustomSignals(remoteConfig, signals);
+        should(result).equal(null);
+      });
+
+      it('should reject with invalid signal value', async function () {
+        const { setCustomSignals, getRemoteConfig } = remoteConfigModular;
+        const remoteConfig = getRemoteConfig(firebase.app());
+
+        const invalidSignals = [
+          { signal1: true },
+          { signal1: [1, 2, 3] },
+          { signal1: { key: 'value' } },
+          { signal1: false },
+        ];
+
+        for (const signals of invalidSignals) {
+          try {
+            await setCustomSignals(remoteConfig, signals);
+            throw new Error('Expected setCustomSignals to throw an error');
+          } catch (error) {
+            error.message.should.containEql(
+              'firebase.remoteConfig().setCustomSignals(): Invalid type for custom signal',
+            );
+          }
+        }
+        return Promise.resolve();
+      });
+    });
   });
 });

packages/remote-config/ios/RNFBConfig/RNFBConfigModule.m

@@ -305,6 +305,24 @@ - (void)invalidate {
   }
 }
 
+RCT_EXPORT_METHOD(setCustomSignals
+                  : (FIRApp *)firebaseApp
+                  : (NSDictionary *)customSignals
+                  : (RCTPromiseResolveBlock)resolve
+                  : (RCTPromiseRejectBlock)reject) {
+  [[FIRRemoteConfig remoteConfigWithApp:firebaseApp]
+      setCustomSignals:customSignals
+        withCompletion:^(NSError *_Nullable error) {
+          if (error != nil) {
+            [RNFBSharedUtils rejectPromiseWithNSError:reject error:error];
+          } else {
+            resolve(nil);
+          }
+        }];
+
+  resolve([self resultWithConstants:[NSNull null] firebaseApp:firebaseApp]);
+}
+
 #pragma mark -
 #pragma mark Internal Helper Methods
 

packages/remote-config/lib/modular/index.d.ts

@@ -206,3 +206,24 @@ export function onConfigUpdated(
   remoteConfig: RemoteConfig,
   callback: (config: ConfigValues) => void,
 ): () => void;
+
+/**
+ * Defines the type for representing custom signals and their values.
+ * The values in CustomSignals must be one of the following types: string, number, or null.
+ */
+
+export interface CustomSignals {
+  [key: string]: string | number | null;
+}
+
+/**
+ * Sets the custom signals for the app instance.
+ * @param {RemoteConfig} remoteConfig - RemoteConfig instance
+ * @param {CustomSignals} customSignals - CustomSignals
+ * @returns {Promise<void>}
+ */
+
+export declare function setCustomSignals(
+  remoteConfig: RemoteConfig,
+  customSignals: CustomSignals,
+): Promise<void>;

packages/remote-config/lib/modular/index.js

@@ -26,6 +26,7 @@
  * @typedef {import('..').FirebaseRemoteConfigTypes.ConfigValues} ConfigValues
  * @typedef {import('..').FirebaseRemoteConfigTypes.LastFetchStatusType} LastFetchStatusType
  * @typedef {import('..').FirebaseRemoteConfigTypes.RemoteConfigLogLevel} RemoteConfigLogLevel
+ * @typedef {import('.').CustomSignals} CustomSignals
  */
 
 /**
@@ -243,3 +244,20 @@
 export function onConfigUpdated(remoteConfig, callback) {
   return remoteConfig.onConfigUpdated(callback);
 }
+
+/**
+ * Sets the custom signals for the app instance.
+ * @param {RemoteConfig} remoteConfig - RemoteConfig instance
+ * @param {CustomSignals} customSignals - CustomSignals
+ * @returns {Promise<void>}
+ */
+export async function setCustomSignals(remoteConfig, customSignals) {
+  for (const [key, value] of Object.entries(customSignals)) {
+    if (typeof value !== 'string' && typeof value !== 'number' && value !== null) {
+      throw new Error(
+        `firebase.remoteConfig().setCustomSignals(): Invalid type for custom signal '${key}': ${typeof value}. Expected 'string', 'number', or 'null'.`,
+      );
+    }
+  }
+  return remoteConfig._promiseWithConstants(remoteConfig.native.setCustomSignals(customSignals));
+}

packages/remote-config/lib/web/RNFBConfigModule.js

@@ -7,6 +7,7 @@ import {
   fetchConfig,
   getAll,
   makeIDBAvailable,
+  setCustomSignals,
 } from '@react-native-firebase/app/lib/internal/web/firebaseRemoteConfig';
 import { guard } from '@react-native-firebase/app/lib/internal/web/utils';
 
@@ -113,4 +114,11 @@ export default {
       return resultAndConstants(remoteConfig, null);
     });
   },
+  setCustomSignals(appName, customSignals) {
+    return guard(async () => {
+      const remoteConfig = getRemoteConfigInstanceForApp(appName);
+      await setCustomSignals(remoteConfig, customSignals);
+      return resultAndConstants(remoteConfig, null);
+    });
+  },
 };