fix(YouTube/Description components): add supports A/B tests for the Expand video description setting

src/main/kotlin/app/revanced/patches/youtube/player/descriptions/DescriptionComponentsPatch.kt

@@ -1,19 +1,26 @@
 package app.revanced.patches.youtube.player.descriptions
 
 import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.InstructionExtensions.addInstruction
 import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
 import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
 import app.revanced.patches.shared.litho.LithoFilterPatch
+import app.revanced.patches.youtube.player.descriptions.fingerprints.EngagementPanelSubHeaderFingerprint
 import app.revanced.patches.youtube.player.descriptions.fingerprints.TextViewComponentFingerprint
 import app.revanced.patches.youtube.utils.integrations.Constants.COMPATIBLE_PACKAGE
 import app.revanced.patches.youtube.utils.integrations.Constants.COMPONENTS_PATH
 import app.revanced.patches.youtube.utils.integrations.Constants.PLAYER_CLASS_DESCRIPTOR
+import app.revanced.patches.youtube.utils.playertype.PlayerTypeHookPatch
 import app.revanced.patches.youtube.utils.recyclerview.BottomSheetRecyclerViewPatch
+import app.revanced.patches.youtube.utils.resourceid.SharedResourceIdPatch
 import app.revanced.patches.youtube.utils.settings.SettingsPatch
+import app.revanced.util.getTargetIndexReversed
 import app.revanced.util.getTargetIndexWithMethodReferenceName
 import app.revanced.util.patch.BaseBytecodePatch
 import app.revanced.util.resultOrThrow
+import com.android.tools.smali.dexlib2.Opcode
 import com.android.tools.smali.dexlib2.iface.instruction.FiveRegisterInstruction
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
 
 @Suppress("unused")
 object DescriptionComponentsPatch : BaseBytecodePatch(
@@ -22,17 +29,22 @@ object DescriptionComponentsPatch : BaseBytecodePatch(
     dependencies = setOf(
         BottomSheetRecyclerViewPatch::class,
         LithoFilterPatch::class,
-        SettingsPatch::class
+        PlayerTypeHookPatch::class,
+        SettingsPatch::class,
+        SharedResourceIdPatch::class
     ),
     compatiblePackages = COMPATIBLE_PACKAGE,
-    fingerprints = setOf(TextViewComponentFingerprint)
+    fingerprints = setOf(
+        EngagementPanelSubHeaderFingerprint,
+        TextViewComponentFingerprint
+    )
 ) {
     private const val FILTER_CLASS_DESCRIPTOR =
         "$COMPONENTS_PATH/DescriptionsFilter;"
 
     override fun execute(context: BytecodeContext) {
 
-        // patch for ‘Expand video description’ and ‘Disable video description interaction’.
+        // patch for disable video description interaction and expand video description.
         // since these patches are still A/B tested, they are classified as 'Experimental flags'.
         if (SettingsPatch.upward1902) {
             TextViewComponentFingerprint.resultOrThrow().let {
@@ -48,6 +60,17 @@ object DescriptionComponentsPatch : BaseBytecodePatch(
                 }
             }
 
+            EngagementPanelSubHeaderFingerprint.resultOrThrow().mutableMethod.apply {
+                val instructionIndex = getTargetIndexReversed(Opcode.INVOKE_INTERFACE) + 1
+                val viewRegister = getInstruction<OneRegisterInstruction>(instructionIndex).registerA
+
+                addInstruction(
+                    instructionIndex + 1,
+                    "invoke-static { v$viewRegister }, " +
+                            "$PLAYER_CLASS_DESCRIPTOR->engagementPanelSubHeaderViewLoaded(Landroid/view/View;)V",
+                )
+            }
+
             BottomSheetRecyclerViewPatch.injectCall("$PLAYER_CLASS_DESCRIPTOR->onVideoDescriptionCreate(Landroid/support/v7/widget/RecyclerView;)V")
 
             /**

src/main/kotlin/app/revanced/patches/youtube/player/descriptions/fingerprints/EngagementPanelSubHeaderFingerprint.kt

@@ -0,0 +1,13 @@
+package app.revanced.patches.youtube.player.descriptions.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patches.youtube.utils.resourceid.SharedResourceIdPatch.PanelSubHeader
+import app.revanced.util.fingerprint.LiteralValueFingerprint
+import com.android.tools.smali.dexlib2.AccessFlags
+
+internal object EngagementPanelSubHeaderFingerprint : LiteralValueFingerprint(
+    accessFlags = AccessFlags.PUBLIC or AccessFlags.STATIC,
+    returnType = "V",
+    parameters = listOf("Landroid/view/ViewGroup;", "L"),
+    literalSupplier = { PanelSubHeader }
+)

src/main/kotlin/app/revanced/patches/youtube/utils/resourceid/SharedResourceIdPatch.kt

@@ -58,6 +58,7 @@ object SharedResourceIdPatch : ResourcePatch() {
     var InterstitialsContainer = -1L
     var MenuItemView = -1L
     var MusicAppDeeplinkButtonView = -1L
+    var PanelSubHeader = -1L
     var PosterArtWidthDefault = -1L
     var QualityAuto = -1L
     var QuickActionsElementContainer = -1L
@@ -133,6 +134,7 @@ object SharedResourceIdPatch : ResourcePatch() {
         InterstitialsContainer = getId(ID, "interstitials_container")
         MenuItemView = getId(ID, "menu_item_view")
         MusicAppDeeplinkButtonView = getId(ID, "music_app_deeplink_button_view")
+        PanelSubHeader = getId(ID, "panel_subheader")
         PosterArtWidthDefault = getId(DIMEN, "poster_art_width_default")
         QualityAuto = getId(STRING, "quality_auto")
         QuickActionsElementContainer = getId(ID, "quick_actions_element_container")