1 files changed, 167 insertions, 0 deletions
diff --git a/java/com/android/voicemail/impl/VvmPackageInstallHandler.java b/java/com/android/voicemail/impl/VvmPackageInstallHandler.java
new file mode 100644
index 000000000..8d1fb2289
--- /dev/null
+++ b/java/com/android/voicemail/impl/VvmPackageInstallHandler.java
@@ -0,0 +1,167 @@
+/*
+ * Copyright (C) 2017 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.voicemail.impl;
+
+import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.pm.ChangedPackages;
+import android.os.Build.VERSION_CODES;
+import android.preference.PreferenceManager;
+import android.provider.Settings.Global;
+import android.telecom.PhoneAccountHandle;
+import android.telecom.TelecomManager;
+import android.util.ArraySet;
+import com.android.dialer.common.PackageUtils;
+import com.android.voicemail.impl.settings.VisualVoicemailSettingsUtil;
+import java.util.Set;
+
+/**
+ * When a new package is installed, check if it matches any of the vvm carrier apps of the currently
+ * enabled dialer VVM sources. The dialer VVM client will be disabled upon carrier VVM app
+ * installation, unless it was explicitly enabled by the user.
+ *
+ * <p>The ACTION_PACKAGE_ADDED broadcast can no longer be received. (see
+ * https://developer.android.com/preview/features/background.html#broadcasts) New apps are scanned
+ * when a VVM SMS is received instead, as it can be a result of the carrier VVM app trying to run
+ * activation.
+ */
+@SuppressLint("AndroidApiChecker") // forEach
+@TargetApi(VERSION_CODES.O)
+public final class VvmPackageInstallHandler {
+
+  private static final String LAST_BOOT_COUNT =
+      "com.android.voicemail.impl.VvmPackageInstallHandler.LAST_BOOT_COUNT";
+
+  private static final String CHANGED_PACKAGES_SEQUENCE_NUMBER =
+      "com.android.voicemail.impl.VvmPackageInstallHandler.CHANGED_PACKAGES_SEQUENCE_NUMBER";
+
+  private static final String INSTALLED_CARRIER_PACKAGES =
+      "com.android.voicemail.impl.VvmPackageInstallHandler.INSTALLED_CARRIER_PACKAGES";
+
+  /**
+   * Perform a scan of all changed apps since the last invocation to see if the carrier VVM app is
+   * installed.
+   */
+  public static void scanNewPackages(Context context) {
+    SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
+    int sequenceNumber = sharedPreferences.getInt(CHANGED_PACKAGES_SEQUENCE_NUMBER, 0);
+    int lastBootCount = sharedPreferences.getInt(LAST_BOOT_COUNT, 0);
+    int bootCount = Global.getInt(context.getContentResolver(), Global.BOOT_COUNT, 0);
+    if (lastBootCount != bootCount) {
+      VvmLog.i(
+          "VvmPackageInstallHandler.scanNewPackages", "reboot detected, resetting sequence number");
+      sequenceNumber = 0;
+      sharedPreferences.edit().putInt(LAST_BOOT_COUNT, bootCount).apply();
+    }
+
+    ChangedPackages changedPackages =
+        context.getPackageManager().getChangedPackages(sequenceNumber);
+    if (changedPackages == null) {
+      VvmLog.i("VvmPackageInstallHandler.scanNewPackages", "no package has changed");
+      return;
+    }
+    sharedPreferences
+        .edit()
+        .putInt(CHANGED_PACKAGES_SEQUENCE_NUMBER, changedPackages.getSequenceNumber())
+        .apply();
+
+    Set<String> installedPackages =
+        sharedPreferences.getStringSet(INSTALLED_CARRIER_PACKAGES, new ArraySet<>());
+
+    Set<String> monitoredPackage = getMonitoredPackages(context);
+    installedPackages.removeIf((packageName) -> !monitoredPackage.contains(packageName));
+
+    for (String packageName : changedPackages.getPackageNames()) {
+      if (!monitoredPackage.contains(packageName)) {
+        continue;
+      }
+      if (PackageUtils.isPackageEnabled(packageName, context)) {
+        if (!installedPackages.contains(packageName)) {
+          VvmLog.i("VvmPackageInstallHandler.scanNewPackages", "new package found: " + packageName);
+          installedPackages.add(packageName);
+          handlePackageInstalled(context, packageName);
+        }
+      } else {
+        installedPackages.remove(packageName);
+      }
+    }
+    sharedPreferences.edit().putStringSet(INSTALLED_CARRIER_PACKAGES, installedPackages).apply();
+  }
+
+  private static Set<String> getMonitoredPackages(Context context) {
+    Set<String> result = new ArraySet<>();
+    context
+        .getSystemService(TelecomManager.class)
+        .getCallCapablePhoneAccounts()
+        .forEach(
+            (phoneAccountHandle -> {
+              OmtpVvmCarrierConfigHelper carrierConfigHelper =
+                  new OmtpVvmCarrierConfigHelper(context, phoneAccountHandle);
+              if (!carrierConfigHelper.isValid()) {
+                return;
+              }
+              if (carrierConfigHelper.getCarrierVvmPackageNames() == null) {
+                return;
+              }
+              result.addAll(carrierConfigHelper.getCarrierVvmPackageNames());
+            }));
+
+    return result;
+  };
+
+  /**
+   * Iterates through all phone account and disable VVM on a account if {@code packageName} is
+   * listed as a carrier VVM package.
+   */
+  private static void handlePackageInstalled(Context context, String packageName) {
+    // This get called every time an app is installed and will be noisy. Don't log until the app
+    // is identified as a carrier VVM app.
+    for (PhoneAccountHandle phoneAccount :
+        context.getSystemService(TelecomManager.class).getCallCapablePhoneAccounts()) {
+      OmtpVvmCarrierConfigHelper carrierConfigHelper =
+          new OmtpVvmCarrierConfigHelper(context, phoneAccount);
+      if (!carrierConfigHelper.isValid()) {
+        continue;
+      }
+      if (carrierConfigHelper.getCarrierVvmPackageNames() == null) {
+        continue;
+      }
+      if (!carrierConfigHelper.getCarrierVvmPackageNames().contains(packageName)) {
+        continue;
+      }
+
+      VvmLog.i("VvmPackageInstallHandler.handlePackageInstalled", "Carrier app installed");
+      if (VisualVoicemailSettingsUtil.isEnabledUserSet(context, phoneAccount)) {
+        // Skip the check if this voicemail source's setting is overridden by the user.
+        VvmLog.i(
+            "VvmPackageInstallHandler.handlePackageInstalled",
+            "VVM enabled by user, not disabling");
+        continue;
+      }
+
+      // Force deactivate the client. The user can re-enable it in the settings.
+      // There is no need to update the settings for deactivation. At this point, if the
+      // default value is used it should be false because a carrier package is present.
+      VvmLog.i(
+          "VvmPackageInstallHandler.handlePackageInstalled",
+          "Carrier VVM package installed, disabling system VVM client");
+      VisualVoicemailSettingsUtil.setEnabled(context, phoneAccount, false);
+    }
+  }
+}