Add util for reverting schedule mode

This is needed for keeping people in a good state in case they
uninstall the app that provides the signal for routine automatic
battery saver mode

Test: in sibling CL
Bug: 111450127
Change-Id: I0ecc59cc8b8275be1f1211207ad523f45b86175e

3 files changed, 24 insertions, 0 deletions

diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index 97a21a55f67f..98b206940687 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -1165,6 +1165,10 @@
     <!-- The default suggested battery % at which we enable battery saver automatically.  -->
     <integer name="config_lowBatteryAutoTriggerDefaultLevel">15</integer>
 
+    <!-- The app which will handle routine based automatic battery saver, if empty the UI for
+             routine based battery saver will be hidden -->
+    <string name="config_batterySaverScheduleProvider"></string>
+
     <!-- Close low battery warning when battery level reaches the lowBatteryWarningLevel
          plus this -->
     <integer name="config_lowBatteryCloseWarningBump">5</integer>
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 161e41681486..4cf019023b0e 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -3459,6 +3459,7 @@
   <java-symbol type="integer" name="config_lowBatteryAutoTriggerDefaultLevel" />
   <java-symbol type="bool" name="config_batterySaverStickyBehaviourDisabled" />
   <java-symbol type="integer" name="config_dynamicPowerSavingsDefaultDisableThreshold" />
+  <java-symbol type="string" name="config_batterySaverScheduleProvider" />
 
   <!-- For car devices -->
   <java-symbol type="string" name="car_loading_profile" />
diff --git a/packages/SettingsLib/src/com/android/settingslib/fuelgauge/BatterySaverUtils.java b/packages/SettingsLib/src/com/android/settingslib/fuelgauge/BatterySaverUtils.java
index f7b16f8b18db..c8c05a0f0bb6 100644
--- a/packages/SettingsLib/src/com/android/settingslib/fuelgauge/BatterySaverUtils.java
+++ b/packages/SettingsLib/src/com/android/settingslib/fuelgauge/BatterySaverUtils.java
@@ -22,6 +22,7 @@ import android.content.Intent;
 import android.os.PowerManager;
 import android.provider.Settings.Global;
 import android.provider.Settings.Secure;
+import android.text.TextUtils;
 import android.util.KeyValueListParser;
 import android.util.Log;
 import android.util.Slog;
@@ -176,4 +177,22 @@ public class BatterySaverUtils {
             setAutoBatterySaverTriggerLevel(context, level);
         }
     }
+
+    /**
+     * Reverts battery saver schedule mode to none if we are in a bad state where routine mode
+     * is selected but no app is configured to actually provide the signal.
+     * @param context a valid context
+     */
+    public static void revertScheduleToNoneIfNeeded(Context context) {
+        ContentResolver resolver = context.getContentResolver();
+        final int currentMode = Global.getInt(resolver, Global.AUTOMATIC_POWER_SAVER_MODE,
+                PowerManager.POWER_SAVER_MODE_PERCENTAGE);
+        boolean providerConfigured = !TextUtils.isEmpty(context.getString(
+                com.android.internal.R.string.config_batterySaverScheduleProvider));
+        if (currentMode == PowerManager.POWER_SAVER_MODE_DYNAMIC && !providerConfigured) {
+            Global.putInt(resolver, Global.LOW_POWER_MODE_TRIGGER_LEVEL, 0);
+            Global.putInt(resolver, Global.AUTOMATIC_POWER_SAVER_MODE,
+                    PowerManager.POWER_SAVER_MODE_PERCENTAGE);
+        }
+    }
 }