revanced-patches/src/main/kotlin/app/revanced/patches/twitter/interaction/downloads/UnlockDownloadsPatch.kt

84 lines
4.0 KiB
Kotlin

package app.revanced.patches.twitter.interaction.downloads
import app.revanced.patcher.data.BytecodeContext
import app.revanced.patcher.extensions.InstructionExtensions.addInstruction
import app.revanced.patcher.extensions.InstructionExtensions.addInstructionsWithLabels
import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
import app.revanced.patcher.extensions.InstructionExtensions.getInstructions
import app.revanced.patcher.extensions.InstructionExtensions.removeInstruction
import app.revanced.patcher.fingerprint.MethodFingerprint
import app.revanced.patcher.fingerprint.MethodFingerprintResult
import app.revanced.patcher.patch.BytecodePatch
import app.revanced.patcher.patch.annotation.CompatiblePackage
import app.revanced.patcher.patch.annotation.Patch
import app.revanced.patcher.util.smali.ExternalLabel
import app.revanced.patches.twitter.interaction.downloads.fingerprints.BuildMediaOptionsSheetFingerprint
import app.revanced.patches.twitter.interaction.downloads.fingerprints.ConstructMediaOptionsSheetFingerprint
import app.revanced.patches.twitter.interaction.downloads.fingerprints.ShowDownloadVideoUpsellBottomSheetFingerprint
import app.revanced.util.exception
import com.android.tools.smali.dexlib2.Opcode
import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
import com.android.tools.smali.dexlib2.iface.instruction.TwoRegisterInstruction
@Patch(
name = "Unlock downloads",
description = "Unlocks the ability to download any video. GIFs can be downloaded via the menu on long press.",
compatiblePackages = [CompatiblePackage("com.twitter.android")],
)
@Suppress("unused")
object UnlockDownloadsPatch : BytecodePatch(
setOf(
ConstructMediaOptionsSheetFingerprint,
ShowDownloadVideoUpsellBottomSheetFingerprint,
BuildMediaOptionsSheetFingerprint,
),
) {
override fun execute(context: BytecodeContext) {
fun MethodFingerprint.patch(getRegisterAndIndex: MethodFingerprintResult.() -> Pair<Int, Int>) = result?.let {
getRegisterAndIndex(it).let { (index, register) ->
it.mutableMethod.addInstruction(index, "const/4 v$register, 0x1")
}
} ?: throw exception
// Allow downloads for non-premium users.
ShowDownloadVideoUpsellBottomSheetFingerprint.patch {
val checkIndex = scanResult.patternScanResult!!.startIndex
val register = mutableMethod.getInstruction<OneRegisterInstruction>(checkIndex).registerA
checkIndex to register
}
// Force show the download menu item.
ConstructMediaOptionsSheetFingerprint.patch {
val showDownloadButtonIndex = mutableMethod.getInstructions().lastIndex - 1
val register = mutableMethod.getInstruction<TwoRegisterInstruction>(showDownloadButtonIndex).registerA
showDownloadButtonIndex to register
}
// Make GIFs downloadable.
BuildMediaOptionsSheetFingerprint.result?.let {
val scanResult = it.scanResult.patternScanResult!!
it.mutableMethod.apply {
val checkMediaTypeIndex = scanResult.startIndex
val checkMediaTypeInstruction = getInstruction<TwoRegisterInstruction>(checkMediaTypeIndex)
// Treat GIFs as videos.
addInstructionsWithLabels(
checkMediaTypeIndex + 1,
"""
const/4 v${checkMediaTypeInstruction.registerB}, 0x2 # GIF
if-eq v${checkMediaTypeInstruction.registerA}, v${checkMediaTypeInstruction.registerB}, :video
""",
ExternalLabel("video", getInstruction(scanResult.endIndex)),
)
// Remove media.isDownloadable check.
removeInstruction(
getInstructions().first { insn -> insn.opcode == Opcode.IGET_BOOLEAN }.location.index + 1,
)
}
} ?: throw BuildMediaOptionsSheetFingerprint.exception
}
}