feat(Google Photos): Restore hidden 'Back up while charging' toggle (#3678)

Co-authored-by: oSumAtrIX <[email protected]>

Author: xob0t

api/revanced-patches.api

@@ -321,6 +321,12 @@ public final class app/revanced/patches/googlephotos/misc/integrations/Integrati
 	public static final field INSTANCE Lapp/revanced/patches/googlephotos/misc/integrations/IntegrationsPatch;
 }
 
+public final class app/revanced/patches/googlephotos/preferences/RestoreHiddenBackUpWhileChargingTogglePatch : app/revanced/patcher/patch/BytecodePatch {
+	public static final field INSTANCE Lapp/revanced/patches/googlephotos/preferences/RestoreHiddenBackUpWhileChargingTogglePatch;
+	public fun execute (Lapp/revanced/patcher/data/BytecodeContext;)V
+	public synthetic fun execute (Lapp/revanced/patcher/data/Context;)V
+}
+
 public final class app/revanced/patches/googlerecorder/restrictions/RemoveDeviceRestrictions : app/revanced/patcher/patch/BytecodePatch {
 	public static final field INSTANCE Lapp/revanced/patches/googlerecorder/restrictions/RemoveDeviceRestrictions;
 	public fun execute (Lapp/revanced/patcher/data/BytecodeContext;)V

src/main/kotlin/app/revanced/patches/googlephotos/preferences/RestoreHiddenBackUpWhileChargingTogglePatch.kt

@@ -0,0 +1,33 @@
+package app.revanced.patches.googlephotos.preferences
+
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.InstructionExtensions.addInstruction
+import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.annotation.CompatiblePackage
+import app.revanced.patcher.patch.annotation.Patch
+import app.revanced.patches.googlephotos.preferences.fingerprints.BackupPreferencesFingerprint
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
+
+@Patch(
+    name = "Restore hidden 'Back up while charging' toggle",
+    description = "Restores a hidden toggle to only run backups when the device is charging.",
+    compatiblePackages = [CompatiblePackage("com.google.android.apps.photos")],
+)
+@Suppress("unused")
+object RestoreHiddenBackUpWhileChargingTogglePatch : BytecodePatch(
+    setOf(BackupPreferencesFingerprint),
+) {
+    override fun execute(context: BytecodeContext) {
+        // Patches 'backup_prefs_had_backup_only_when_charging_enabled' to always be true.
+        BackupPreferencesFingerprint.result?.let {
+            val chargingPrefStringIndex = it.scanResult.stringsScanResult!!.matches.first().index
+            it.mutableMethod.apply {
+                // Get the register of move-result.
+                val resultRegister = getInstruction<OneRegisterInstruction>(chargingPrefStringIndex + 2).registerA
+                // Insert const after move-result to override register as true.
+                addInstruction(chargingPrefStringIndex + 3, "const/4 v$resultRegister, 0x1")
+            }
+        } ?: throw Exception("BackupPreferencesFingerprint result not found")
+    }
+}

src/main/kotlin/app/revanced/patches/googlephotos/preferences/fingerprints/BackupPreferencesFingerprint.kt

@@ -0,0 +1,10 @@
+package app.revanced.patches.googlephotos.preferences.fingerprints
+
+import app.revanced.patcher.fingerprint.MethodFingerprint
+
+internal object BackupPreferencesFingerprint : MethodFingerprint(
+    returnType = "Lcom/google/android/apps/photos/backup/data/BackupPreferences;",
+    strings = listOf(
+        "backup_prefs_had_backup_only_when_charging_enabled",
+    ),
+)