From bd4d3b5706f26e398292df952ca8aec6c7dd1d6a Mon Sep 17 00:00:00 2001
From: LisoUseInAIKyrios <118716522+LisoUseInAIKyrios@users.noreply.github.com>
Date: Tue, 10 Jan 2023 22:27:53 +0400
Subject: [PATCH] feat(youtube): `spoof-app-version` patch (#1449)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
---
 .../SpoofAppVersionCompatibility.kt           | 14 ++++
 .../SpoofAppVersionFingerprint.kt             | 19 ++++++
 .../bytecode/patch/SpoofAppVersionPatch.kt    | 64 +++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/annotations/SpoofAppVersionCompatibility.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/fingerprints/SpoofAppVersionFingerprint.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/patch/SpoofAppVersionPatch.kt

diff --git a/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/annotations/SpoofAppVersionCompatibility.kt b/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/annotations/SpoofAppVersionCompatibility.kt
new file mode 100644
index 000000000..0a4637ce3
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/annotations/SpoofAppVersionCompatibility.kt
@@ -0,0 +1,14 @@
+package app.revanced.patches.youtube.layout.spoofappversion.annotations
+
+import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.Package
+
+@Compatibility(
+    [Package(
+        "com.google.android.youtube", arrayOf("17.49.37")
+    )]
+)
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+internal annotation class SpoofAppVersionCompatibility
+
diff --git a/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/fingerprints/SpoofAppVersionFingerprint.kt b/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/fingerprints/SpoofAppVersionFingerprint.kt
new file mode 100644
index 000000000..8a5736f12
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/fingerprints/SpoofAppVersionFingerprint.kt
@@ -0,0 +1,19 @@
+package app.revanced.patches.youtube.layout.spoofappversion.bytecode.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcode
+
+object SpoofAppVersionFingerprint : MethodFingerprint(
+    "L", AccessFlags.PUBLIC or AccessFlags.STATIC, listOf("L"), listOf(
+        Opcode.IGET_OBJECT,
+        Opcode.GOTO,
+        Opcode.CONST_STRING,
+    ),
+
+    // Instead of applying a bytecode patch, it might be possible to only rely on code from the integrations and
+    // manually set the desired version string as this keyed value in the SharedPreferences.
+    // But, this bytecode patch is simple and it works.
+    strings = listOf("pref_override_build_version_name")
+)
\ No newline at end of file
diff --git a/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/patch/SpoofAppVersionPatch.kt b/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/patch/SpoofAppVersionPatch.kt
new file mode 100644
index 000000000..3a3b5c81b
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/layout/spoofappversion/bytecode/patch/SpoofAppVersionPatch.kt
@@ -0,0 +1,64 @@
+package app.revanced.patches.youtube.layout.spoofappversion.bytecode.patch
+
+import app.revanced.extensions.toErrorResult
+import app.revanced.patcher.annotation.Description
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.addInstructions
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.annotations.DependsOn
+import app.revanced.patcher.patch.annotations.Patch
+import app.revanced.patches.shared.settings.preference.impl.StringResource
+import app.revanced.patches.shared.settings.preference.impl.SwitchPreference
+import app.revanced.patches.youtube.layout.spoofappversion.annotations.SpoofAppVersionCompatibility
+import app.revanced.patches.youtube.layout.spoofappversion.bytecode.fingerprints.SpoofAppVersionFingerprint
+import app.revanced.patches.youtube.misc.integrations.patch.IntegrationsPatch
+import app.revanced.patches.youtube.misc.settings.bytecode.patch.SettingsPatch
+import org.jf.dexlib2.iface.instruction.OneRegisterInstruction
+
+@Patch
+@DependsOn([IntegrationsPatch::class, SettingsPatch::class])
+@Name("spoof-app-version")
+@Description("Tricks YouTube into thinking, you are running an older version of the app. One of the side effects also includes restoring the old UI.")
+@SpoofAppVersionCompatibility
+@Version("0.0.1")
+class SpoofAppVersionPatch : BytecodePatch(
+    listOf(
+        SpoofAppVersionFingerprint
+    )
+) {
+    companion object {
+        const val INTEGRATIONS_CLASS_DESCRIPTOR = "Lapp/revanced/integrations/patches/SpoofAppVersionPatch"
+    }
+
+    override fun execute(context: BytecodeContext): PatchResult {
+        SettingsPatch.PreferenceScreen.LAYOUT.addPreferences(
+            SwitchPreference(
+                "revanced_spoof_app_version",
+                StringResource("revanced_spoof_app_version_title", "Spoof app version"),
+                false,
+                StringResource("revanced_spoof_app_version_summary_on", "Version spoofed to 17.30.34. If switched off, the old UI layout may remain until logging out or clearing app data"),
+                StringResource("revanced_spoof_app_version_summary_off", "Version not spoofed")
+            )
+        )
+
+        SpoofAppVersionFingerprint.result?.apply {
+            val insertIndex = scanResult.patternScanResult!!.startIndex + 1
+            val buildOverrideNameRegister =
+                (mutableMethod.implementation!!.instructions[insertIndex - 1] as OneRegisterInstruction).registerA
+
+            mutableMethod.addInstructions(
+                insertIndex,
+                """
+                        invoke-static {v$buildOverrideNameRegister}, $INTEGRATIONS_CLASS_DESCRIPTOR;->getYouTubeVersionOverride(Ljava/lang/String;)Ljava/lang/String;
+                        move-result-object v$buildOverrideNameRegister
+                         """
+            )
+        } ?: return SpoofAppVersionFingerprint.toErrorResult()
+
+        return PatchResultSuccess()
+    }
+}
\ No newline at end of file