Add battery manager utility

Signed-off-by: Tyler Nijmeh <tylernij@gmail.com>

2 files changed, 68 insertions, 0 deletions

diff --git a/app/src/main/java/com/draco/buoy/repositories/BatterySaverSecureSettings.kt b/app/src/main/java/com/draco/buoy/repositories/BatterySaverSecureSettings.kt
new file mode 100644
index 0000000..c769cf5
--- /dev/null
+++ b/app/src/main/java/com/draco/buoy/repositories/BatterySaverSecureSettings.kt
@@ -0,0 +1,9 @@
+package com.draco.buoy.repositories
+
+/**
+ * Expose secure settings hidden in the Android APIs
+ */
+object BatterySaverSecureSettings {
+    const val BATTERY_SAVER_CONSTANTS =     "battery_saver_constants"
+    const val LOW_POWER =                   "low_power"
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/draco/buoy/utils/BatterySaverManager.kt b/app/src/main/java/com/draco/buoy/utils/BatterySaverManager.kt
new file mode 100644
index 0000000..d8f5c5b
--- /dev/null
+++ b/app/src/main/java/com/draco/buoy/utils/BatterySaverManager.kt
@@ -0,0 +1,59 @@
+package com.draco.buoy.utils
+
+import android.content.ContentResolver
+import android.provider.Settings
+import com.draco.buoy.models.BatterySaverConstantsConfig
+import com.draco.buoy.repositories.BatterySaverSecureSettings
+
+class BatterySaverManager(private val contentResolver: ContentResolver) {
+    /**
+     * Reset constants to default values
+     */
+    fun resetConstants() {
+        Settings.Global.putString(
+            contentResolver,
+            BatterySaverSecureSettings.BATTERY_SAVER_CONSTANTS,
+            null
+        )
+    }
+
+    /**
+     * Enable or disable low power mode
+     */
+    fun setBatterySaverState(state: Boolean) {
+        val intBool = if (state) 1 else 0
+        Settings.Global.putInt(
+            contentResolver,
+            BatterySaverSecureSettings.LOW_POWER,
+            intBool
+        )
+    }
+
+    /**
+     * Get current low power state
+     */
+    fun getBatteryPowerSaverState(): Boolean {
+        return Settings.Global.getInt(
+            contentResolver,
+            BatterySaverSecureSettings.LOW_POWER
+        ) == 1
+    }
+
+    /**
+     * Set the raw battery saver constants secure setting
+     */
+    fun setConstantsString(constants: String) {
+        Settings.Global.putString(
+            contentResolver,
+            BatterySaverSecureSettings.BATTERY_SAVER_CONSTANTS,
+            constants
+        )
+    }
+
+    /**
+     * Set the battery saver constants secure setting via a config
+     */
+    fun setConstantsConfig(config: BatterySaverConstantsConfig) {
+        setConstantsString(config.toString())
+    }
+}
\ No newline at end of file