Added skeleton code for PlayIntegrityAppCheckProviderFactory and PlayIntegrityAppCheckProvider.

Author: rosalyntan

appcheck/firebase-appcheck-playintegrity/firebase-appcheck-playintegrity.gradle

@@ -44,6 +44,8 @@ dependencies {
     implementation project(':firebase-common')
     implementation project(':firebase-components')
     implementation project(':appcheck:firebase-appcheck')
+    implementation 'com.google.android.gms:play-services-base:18.0.1'
+    implementation 'com.google.android.gms:play-services-tasks:18.0.1'
 
     testImplementation 'junit:junit:4.13-beta-2'
 }

appcheck/firebase-appcheck-playintegrity/src/main/java/com/google/firebase/appcheck/playintegrity/PlayIntegrityAppCheckProviderFactory.java

@@ -0,0 +1,46 @@
+// Copyright 2022 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.
+
+package com.google.firebase.appcheck.playintegrity;
+
+import androidx.annotation.NonNull;
+import com.google.firebase.FirebaseApp;
+import com.google.firebase.appcheck.AppCheckProvider;
+import com.google.firebase.appcheck.AppCheckProviderFactory;
+import com.google.firebase.appcheck.playintegrity.internal.PlayIntegrityAppCheckProvider;
+
+/**
+ * Implementation of an {@link AppCheckProviderFactory} that builds {@link
+ * PlayIntegrityAppCheckProvider}s. This is the default implementation.
+ */
+public class PlayIntegrityAppCheckProviderFactory implements AppCheckProviderFactory {
+
+  private static final PlayIntegrityAppCheckProviderFactory instance =
+      new PlayIntegrityAppCheckProviderFactory();
+
+  /**
+   * Gets an instance of this class for installation into a {@link
+   * com.google.firebase.appcheck.FirebaseAppCheck} instance.
+   */
+  @NonNull
+  public static PlayIntegrityAppCheckProviderFactory getInstance() {
+    return instance;
+  }
+
+  @NonNull
+  @Override
+  public AppCheckProvider create(@NonNull FirebaseApp firebaseApp) {
+    return new PlayIntegrityAppCheckProvider();
+  }
+}

appcheck/firebase-appcheck-playintegrity/src/main/java/com/google/firebase/appcheck/playintegrity/internal/PlayIntegrityAppCheckProvider.java

@@ -0,0 +1,34 @@
+// Copyright 2022 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.
+
+package com.google.firebase.appcheck.playintegrity.internal;
+
+import androidx.annotation.NonNull;
+import com.google.android.gms.tasks.Task;
+import com.google.android.gms.tasks.Tasks;
+import com.google.firebase.FirebaseException;
+import com.google.firebase.appcheck.AppCheckProvider;
+import com.google.firebase.appcheck.AppCheckToken;
+
+public class PlayIntegrityAppCheckProvider implements AppCheckProvider {
+
+  public PlayIntegrityAppCheckProvider() {}
+
+  @NonNull
+  @Override
+  public Task<AppCheckToken> getToken() {
+    // TODO(rosalyntan): Implement this.
+    return Tasks.forException(new FirebaseException("Unimplemented"));
+  }
+}