feat(candylinkvpn): add unlock-pro patch (ReVanced#2157)

Co-authored-by: oSumAtrIX <[email protected]>

src/main/kotlin/app/revanced/patches/candylinkvpn/annotations/UnlockProCompatibility.kt

@@ -0,0 +1,8 @@
+package app.revanced.patches.candylinkvpn.annotations
+
+import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.Package
+
+@Compatibility([Package("com.candylink.openvpn")])
+@Target(AnnotationTarget.CLASS)
+internal annotation class UnlockProCompatibility

src/main/kotlin/app/revanced/patches/candylinkvpn/fingereprints/IsPremiumPurchasedFingerprint.kt

@@ -0,0 +1,11 @@
+package app.revanced.patches.candylinkvpn.fingereprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+
+object IsPremiumPurchasedFingerprint : MethodFingerprint(
+    customFingerprint = { methodDef, _ ->
+        methodDef.definingClass.endsWith("PreferenceProvider;") &&
+                methodDef.name == "isPremiumPurchased"
+    }
+) {
+}

src/main/kotlin/app/revanced/patches/candylinkvpn/patch/UnlockProPatch.kt

@@ -0,0 +1,37 @@
+package app.revanced.patches.candylinkvpn.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.Patch
+import app.revanced.patches.candylinkvpn.annotations.UnlockProCompatibility
+import app.revanced.patches.candylinkvpn.fingereprints.IsPremiumPurchasedFingerprint
+
+@Patch
+@Name("unlock-pro")
+@Description("Unlocks premium features.")
+@UnlockProCompatibility
+@Version("0.0.1")
+class UnlockProPatch : BytecodePatch(
+    listOf(IsPremiumPurchasedFingerprint)
+) {
+    override fun execute(context: BytecodeContext): PatchResult {
+        IsPremiumPurchasedFingerprint.result?.let {
+            it.mutableMethod.addInstructions(
+                0,
+                """
+                   const/4 v0, 0x1
+                    return v0
+                """
+            )
+        } ?: return IsPremiumPurchasedFingerprint.toErrorResult()
+
+        return PatchResultSuccess()
+    }
+}