1 files changed, 74 insertions, 0 deletions
diff --git a/java/com/android/incallui/speakeasy/runtime/Constraints.java b/java/com/android/incallui/speakeasy/runtime/Constraints.java
new file mode 100644
index 000000000..1206d599c
--- /dev/null
+++ b/java/com/android/incallui/speakeasy/runtime/Constraints.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.android.incallui.speakeasy.runtime;
+
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build.VERSION_CODES;
+import android.support.annotation.NonNull;
+import android.support.annotation.VisibleForTesting;
+import android.support.v4.os.BuildCompat;
+import android.support.v4.os.UserManagerCompat;
+import com.android.dialer.common.Assert;
+import com.android.dialer.common.LogUtil;
+import com.android.dialer.configprovider.ConfigProviderBindings;
+import com.android.dialer.util.PermissionsUtil;
+
+/** Preconditions for the use of SpeakEasyModule */
+public final class Constraints {
+
+  @VisibleForTesting public static final String SPEAK_EASY_ENABLED = "speak_easy_enabled";
+  private static final String[] REQUIRED_PERMISSIONS = {
+
+  };
+
+  // Non-instantiatable.
+  private Constraints() {}
+
+  public static boolean isAvailable(@NonNull Context context) {
+    Assert.isNotNull(context);
+
+    return isServerConfigEnabled(context)
+        && isUserUnlocked(context)
+        && meetsPlatformSdkFloor()
+        && hasNecessaryPermissions(context);
+  }
+
+  private static boolean isServerConfigEnabled(@NonNull Context context) {
+    return ConfigProviderBindings.get(context).getBoolean(SPEAK_EASY_ENABLED, false);
+  }
+
+  private static boolean isUserUnlocked(@NonNull Context context) {
+    return UserManagerCompat.isUserUnlocked(context);
+  }
+
+  private static boolean meetsPlatformSdkFloor() {
+    return BuildCompat.isAtLeastP();
+  }
+
+  @SuppressWarnings("AndroidApiChecker") // Use of Java 8 APIs.
+  @TargetApi(VERSION_CODES.N)
+  private static boolean hasNecessaryPermissions(@NonNull Context context) {
+    for (String permission : REQUIRED_PERMISSIONS) {
+      if (!PermissionsUtil.hasPermission(context, permission)) {
+        LogUtil.i("Constraints.hasNecessaryPermissions", "missing permission: %s ", permission);
+        return false;
+      }
+    }
+    return true;
+  }
+}