feat(crunchyroll): enable-downloads patch (#1119)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>

src/main/kotlin/app/revanced/patches/crunchyroll/downloads/annotations/DownloadsCompatibility.kt

@@ -0,0 +1,13 @@
+package app.revanced.patches.crunchyroll.downloads.annotations
+
+import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.Package
+
+@Compatibility(
+    [
+        Package("com.crunchyroll.crunchyroid")
+    ]
+)
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+internal annotation class DownloadsCompatibility

src/main/kotlin/app/revanced/patches/crunchyroll/downloads/fingerprints/DownloadsFingerprint.kt

@@ -0,0 +1,23 @@
+package app.revanced.patches.crunchyroll.downloads.fingerprints
+
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.extensions.or
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import app.revanced.patches.crunchyroll.downloads.annotations.DownloadsCompatibility
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcode
+
+@Name("downloads-fingerprint")
+@DownloadsCompatibility
+@Version("0.0.1")
+object DownloadsFingerprint : MethodFingerprint(
+    "Z", AccessFlags.PUBLIC or AccessFlags.FINAL, null,
+    opcodes = listOf(
+        Opcode.CONST_STRING,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.MOVE_RESULT,
+        Opcode.RETURN
+    ),
+    strings = listOf("offline_viewing"),
+)

src/main/kotlin/app/revanced/patches/crunchyroll/downloads/patch/DownloadsPatch.kt

@@ -0,0 +1,37 @@
+package app.revanced.patches.crunchyroll.downloads.patch
+
+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.replaceInstruction
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.annotations.Patch
+import app.revanced.patches.crunchyroll.downloads.annotations.DownloadsCompatibility
+import app.revanced.patches.crunchyroll.downloads.fingerprints.DownloadsFingerprint
+
+@Patch
+@Name("enable-downloads")
+@Description("Enables downloads for Crunchyroll.")
+@DownloadsCompatibility
+@Version("0.0.1")
+class DownloadsPatch : BytecodePatch(
+    listOf(
+        DownloadsFingerprint
+    )
+) {
+    override fun execute(context: BytecodeContext): PatchResult {
+        with(DownloadsFingerprint.result!!.mutableMethod) {
+            val index = implementation!!.instructions.lastIndex
+            replaceInstruction(
+                index - 1,
+                """
+                   const/4 v0, 0x1 
+                """
+            )
+        }
+        return PatchResultSuccess()
+    }
+}