feat(Instagram): Add Hide reshare button patch

patches/api/patches.api

@@ -284,6 +284,10 @@ public final class app/revanced/patches/instagram/hide/navigation/HideNavigation
 	public static final fun getHideNavigationButtonsPatch ()Lapp/revanced/patcher/patch/BytecodePatch;
 }
 
+public final class app/revanced/patches/instagram/hide/reshare/HideReshareButtonPatchKt {
+	public static final fun getHideReshareButtonPatch ()Lapp/revanced/patcher/patch/BytecodePatch;
+}
+
 public final class app/revanced/patches/instagram/hide/stories/HideStoriesKt {
 	public static final fun getHideStoriesPatch ()Lapp/revanced/patcher/patch/BytecodePatch;
 }

patches/src/main/kotlin/app/revanced/patches/instagram/hide/reshare/Fingerprints.kt

@@ -0,0 +1,30 @@
+package app.revanced.patches.instagram.hide.reshare
+
+import app.revanced.patcher.fingerprint
+import app.revanced.util.indexOfFirstInstruction
+import app.revanced.util.indexOfFirstLiteralInstruction
+import com.android.tools.smali.dexlib2.AccessFlags
+import com.android.tools.smali.dexlib2.Opcode
+import com.android.tools.smali.dexlib2.iface.instruction.formats.SparseSwitchPayload
+
+// The hash code of the field of interest. It is used as the key of a hashmap
+internal val hashedFieldInteger = "enable_media_notes_production".hashCode()
+
+internal val feedResponseMediaParserFingerprint = fingerprint {
+    strings("array_out_of_bounds_exception", "null_pointer_exception", "MediaDict")
+    custom { method, _ ->
+        method.indexOfFirstInstruction {
+            opcode == Opcode.SPARSE_SWITCH_PAYLOAD &&
+                    (this as SparseSwitchPayload).switchElements.any { it.key == hashedFieldInteger }
+        } >= 0
+    }
+}
+
+internal val reelPostsResponseMediaParserFingerprint = fingerprint {
+    accessFlags(AccessFlags.PUBLIC, AccessFlags.STATIC)
+    parameters("L", "L", "L", "[I")
+    returns("L")
+    custom { method, _ ->
+        method.indexOfFirstLiteralInstruction(hashedFieldInteger.toLong()) >= 0
+    }
+}

patches/src/main/kotlin/app/revanced/patches/instagram/hide/reshare/HideReshareButtonPatch.kt

@@ -0,0 +1,72 @@
+package app.revanced.patches.instagram.hide.reshare
+
+import app.revanced.patcher.extensions.InstructionExtensions.addInstruction
+import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
+import app.revanced.patcher.patch.bytecodePatch
+import app.revanced.util.getReference
+import app.revanced.util.indexOfFirstInstructionOrThrow
+import app.revanced.util.indexOfFirstLiteralInstructionOrThrow
+import com.android.tools.smali.dexlib2.Opcode
+import com.android.tools.smali.dexlib2.builder.instruction.BuilderSparseSwitchPayload
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
+import com.android.tools.smali.dexlib2.iface.reference.MethodReference
+
+@Suppress("unused")
+val hideReshareButtonPatch = bytecodePatch(
+    name = "Hide reshare button",
+    description = "Hides the reshare button from both posts and reels.",
+    use = false
+) {
+    compatibleWith("com.instagram.android")
+
+    execute {
+        feedResponseMediaParserFingerprint.method.apply {
+            // Each json field is parsed in a switch statement, where the case of the switch is the hashed field name.
+
+            // First, find the switch payload where our field of interest is being processed. So find the payload that
+            // has a key == to our field of interest.
+            val switchPayload = implementation!!.instructions.first { ins ->
+                ins.opcode == Opcode.SPARSE_SWITCH_PAYLOAD &&
+                        (ins as BuilderSparseSwitchPayload).switchElements.any { it.key == hashedFieldInteger }
+            } as BuilderSparseSwitchPayload
+
+            // Get the target label, so find the instruction offset where the switch case is pointing to.
+            val switchTargetLabel = switchPayload.switchElements
+                .first { it.key == hashedFieldInteger }
+                .target
+
+            // From that label, navigate forward until our field of interest is being instantiated.
+            val moveResultIndex = indexOfFirstInstructionOrThrow(
+                switchTargetLabel.location.index,
+                Opcode.MOVE_RESULT_OBJECT
+            )
+
+            val moveResultRegister = getInstruction<OneRegisterInstruction>(moveResultIndex).registerA
+
+            addInstruction(
+                moveResultIndex + 1,
+                "sget-object v$moveResultRegister, Ljava/lang/Boolean;->FALSE:Ljava/lang/Boolean;"
+            )
+        }
+
+        reelPostsResponseMediaParserFingerprint.method.apply {
+            // Each json field is parsed in a series of if statements, where the if comparison is done comparing the hashed field name.
+
+            // Get index of "const v*, -0x207dadd2".
+            val switchIndex = indexOfFirstLiteralInstructionOrThrow(hashedFieldInteger.toLong())
+
+            // Here an internal Instagram native library is used to handle settings of experiments, using hash codes of the fields.
+            // Find where our field of interest is being instantiated.
+            val moveBooleanResultIndex = indexOfFirstInstructionOrThrow(switchIndex) {
+                getReference<MethodReference>()?.name == "getOptionalBooleanValueByHashCode"
+            } + 1
+
+            val moveBooleanResultRegister = getInstruction<OneRegisterInstruction>(moveBooleanResultIndex).registerA
+
+            addInstruction(
+                moveBooleanResultIndex + 1,
+                "sget-object v$moveBooleanResultRegister, Ljava/lang/Boolean;->FALSE:Ljava/lang/Boolean;"
+            )
+        }
+    }
+}