feat(Tumblr): Add Disable dashboard ads patch (#2979)

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

src/main/kotlin/app/revanced/patches/tumblr/ads/fingerprints/AdWaterfallFingerprint.kt

@@ -0,0 +1,12 @@
+package app.revanced.patches.tumblr.ads.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+
+// The Tumblr app sends a request to /v2/timeline/dashboard which replies with an array of elements
+// to show in the user dashboard. These element have different type ids (post, title, carousel, etc.)
+// The standard dashboard Ad has the id client_side_ad_waterfall, and this string has to be in the code
+// to handle ads and provide their appearance.
+// If we just replace this string in the tumblr code with anything else, it will fail to recognize the
+// dashboard object type and just skip it. This is a bit weird, but it shouldn't break
+// unless they change the api (unlikely) or explicitly Change the tumblr code to prevent this.
+object AdWaterfallFingerprint : MethodFingerprint(strings = listOf("client_side_ad_waterfall"))

src/main/kotlin/app/revanced/patches/tumblr/ads/patch/DisableDashboardAds.kt

@@ -0,0 +1,34 @@
+package app.revanced.patches.tumblr.ads.patch
+
+import app.revanced.extensions.exception
+import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.Description
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Package
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
+import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.annotations.Patch
+import app.revanced.patches.tumblr.ads.fingerprints.AdWaterfallFingerprint
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
+
+@Patch
+@Name("Disable dashboard ads")
+@Description("Disables ads in the dashboard.")
+@Compatibility([Package("com.tumblr")])
+class DisableDashboardAds : BytecodePatch(
+    listOf(AdWaterfallFingerprint)
+) {
+    override fun execute(context: BytecodeContext) = AdWaterfallFingerprint.result?.let {
+        it.scanResult.stringsScanResult!!.matches.forEach { match ->
+            // We just replace all occurrences of "client_side_ad_waterfall" with anything else
+            // so the app fails to handle ads in the timeline elements array and just skips them.
+            // See AdWaterfallFingerprint for more info.
+            val stringRegister = it.mutableMethod.getInstruction<OneRegisterInstruction>(match.index).registerA
+            it.mutableMethod.replaceInstruction(
+                match.index, "const-string v$stringRegister, \"dummy\""
+            )
+        }
+    } ?: throw AdWaterfallFingerprint.exception
+}