Delete voicemails when disabling visual voicemail

For privacy reasons we now delete all voicemails and transcriptions when
the user disables visual voicemail, (after confirming that they want to do this
via a dialog).

Note: we only delete voicemails whose source package is the google dialer.
Note: the voicemails will be re-downloaded and re-transcribed if the user re-enables visual voicemail

Bug: 69323147
Test: manual and unit test
PiperOrigin-RevId: 177315139
Change-Id: Ie04496dc5960b485794733fbf74f7f704e806023

2 files changed, 59 insertions, 9 deletions

diff --git a/java/com/android/dialer/voicemail/settings/VoicemailSettingsFragment.java b/java/com/android/dialer/voicemail/settings/VoicemailSettingsFragment.java
index aaa1e150d..5ae26f5f7 100644
--- a/java/com/android/dialer/voicemail/settings/VoicemailSettingsFragment.java
+++ b/java/com/android/dialer/voicemail/settings/VoicemailSettingsFragment.java
@@ -14,6 +14,8 @@
 package com.android.dialer.voicemail.settings;
 
 import android.annotation.TargetApi;
+import android.app.AlertDialog;
+import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
@@ -226,16 +228,13 @@ public class VoicemailSettingsFragment extends PreferenceFragment
     LogUtil.d(TAG, "onPreferenceChange: \"" + preference + "\" changed to \"" + objValue + "\"");
     if (preference.getKey().equals(voicemailVisualVoicemail.getKey())) {
       boolean isEnabled = (boolean) objValue;
-      voicemailClient.setVoicemailEnabled(getContext(), phoneAccountHandle, isEnabled);
-
-      if (isEnabled) {
-        Logger.get(getContext()).logImpression(DialerImpression.Type.VVM_USER_ENABLED_IN_SETTINGS);
+      if (!isEnabled) {
+        showDisableConfirmationDialog();
+        // Don't let the preference setting proceed.
+        return false;
       } else {
-        Logger.get(getContext()).logImpression(DialerImpression.Type.VVM_USER_DISABLED_IN_SETTINGS);
+        updateVoicemailEnabled(true);
       }
-
-      updateChangePin();
-      updateDonateVoicemail();
     } else if (preference.getKey().equals(autoArchiveSwitchPreference.getKey())) {
       logArchiveToggle((boolean) objValue);
       voicemailClient.setVoicemailArchiveEnabled(
@@ -246,10 +245,24 @@ public class VoicemailSettingsFragment extends PreferenceFragment
           getContext(), phoneAccountHandle, (boolean) objValue);
     }
 
-    // Always let the preference setting proceed.
+    // Let the preference setting proceed.
     return true;
   }
 
+  private void updateVoicemailEnabled(boolean isEnabled) {
+    voicemailClient.setVoicemailEnabled(getContext(), phoneAccountHandle, isEnabled);
+    voicemailVisualVoicemail.setChecked(isEnabled);
+
+    if (isEnabled) {
+      Logger.get(getContext()).logImpression(DialerImpression.Type.VVM_USER_ENABLED_IN_SETTINGS);
+    } else {
+      Logger.get(getContext()).logImpression(DialerImpression.Type.VVM_USER_DISABLED_IN_SETTINGS);
+    }
+
+    updateChangePin();
+    updateDonateVoicemail();
+  }
+
   private void updateChangePin() {
     if (!voicemailClient.isVoicemailEnabled(getContext(), phoneAccountHandle)) {
       voicemailChangePinPreference.setSummary(
@@ -305,4 +318,34 @@ public class VoicemailSettingsFragment extends PreferenceFragment
         .putExtra(Settings.EXTRA_CHANNEL_ID, channelId)
         .putExtra(Settings.EXTRA_APP_PACKAGE, getContext().getPackageName());
   }
+
+  private void showDisableConfirmationDialog() {
+    LogUtil.i(TAG, "showDisableConfirmationDialog");
+    AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
+    builder.setTitle(R.string.confirm_disable_voicemail_dialog_title);
+    builder.setMessage(R.string.confirm_disable_voicemail_dialog_message);
+    builder.setPositiveButton(
+        R.string.confirm_disable_voicemail_accept_dialog_label,
+        new DialogInterface.OnClickListener() {
+          @Override
+          public void onClick(DialogInterface dialog, int which) {
+            LogUtil.i(TAG, "showDisableConfirmationDialog, confirmed");
+            updateVoicemailEnabled(false);
+            dialog.dismiss();
+          }
+        });
+
+    builder.setNegativeButton(
+        android.R.string.cancel,
+        new DialogInterface.OnClickListener() {
+          @Override
+          public void onClick(DialogInterface dialog, int which) {
+            LogUtil.i(TAG, "showDisableConfirmationDialog, cancelled");
+            dialog.dismiss();
+          }
+        });
+
+    builder.setCancelable(true);
+    builder.show();
+  }
 }
diff --git a/java/com/android/dialer/voicemail/settings/res/values/strings.xml b/java/com/android/dialer/voicemail/settings/res/values/strings.xml
index 4e502b488..10fa459ff 100644
--- a/java/com/android/dialer/voicemail/settings/res/values/strings.xml
+++ b/java/com/android/dialer/voicemail/settings/res/values/strings.xml
@@ -118,4 +118,11 @@
   <!-- Summary information for visual voicemail donation setting [CHAR LIMIT=NONE] -->
   <string name="voicemail_donate_preference_summary_info">Let Google review your voicemail messages to improve transcription quality</string>
 
+  <!-- Title for disable visual voicemail confirmation dialog [CHAR LIMIT=40] -->
+  <string name="confirm_disable_voicemail_dialog_title">Turn off visual voicemail</string>
+  <!-- Message explaining the implictions of disabling visual voicemail [CHAR LIMIT=NONE] -->
+  <string name="confirm_disable_voicemail_dialog_message">This will delete any voicemail and Google transcripts stored within this app. Your carrier may keep its own copies.</string>
+  <!-- The label for the confirm-disable-voicemail button [CHAR LIMIT=16] -->
+  <string name="confirm_disable_voicemail_accept_dialog_label">TURN OFF</string>
+
 </resources>