From d9d5e32740227fb98ca21be6a2f6a905d923f290 Mon Sep 17 00:00:00 2001
From: johnconner122 <107796137+johnconner122@users.noreply.github.com>
Date: Sat, 26 Nov 2022 19:08:28 +0500
Subject: [PATCH] feat(crunchyroll): `enable-downloads` patch (#1119)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>
---
 .../annotations/DownloadsCompatibility.kt     | 13 +++++++
 .../fingerprints/DownloadsFingerprint.kt      | 23 ++++++++++++
 .../downloads/patch/DownloadsPatch.kt         | 37 +++++++++++++++++++
 3 files changed, 73 insertions(+)
 create mode 100644 src/main/kotlin/app/revanced/patches/crunchyroll/downloads/annotations/DownloadsCompatibility.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/crunchyroll/downloads/fingerprints/DownloadsFingerprint.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/crunchyroll/downloads/patch/DownloadsPatch.kt

diff --git a/src/main/kotlin/app/revanced/patches/crunchyroll/downloads/annotations/DownloadsCompatibility.kt b/src/main/kotlin/app/revanced/patches/crunchyroll/downloads/annotations/DownloadsCompatibility.kt
new file mode 100644
index 000000000..deb5d7859
--- /dev/null
+++ b/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
\ No newline at end of file
diff --git a/src/main/kotlin/app/revanced/patches/crunchyroll/downloads/fingerprints/DownloadsFingerprint.kt b/src/main/kotlin/app/revanced/patches/crunchyroll/downloads/fingerprints/DownloadsFingerprint.kt
new file mode 100644
index 000000000..12bfec818
--- /dev/null
+++ b/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"),
+)
\ No newline at end of file
diff --git a/src/main/kotlin/app/revanced/patches/crunchyroll/downloads/patch/DownloadsPatch.kt b/src/main/kotlin/app/revanced/patches/crunchyroll/downloads/patch/DownloadsPatch.kt
new file mode 100644
index 000000000..8b9f50859
--- /dev/null
+++ b/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()
+    }
+}
\ No newline at end of file