From 5cb46c4e9180ebc16eddb983dad73d137d8ec047 Mon Sep 17 00:00:00 2001
From: Samo Hribar <34912839+samolego@users.noreply.github.com>
Date: Sat, 27 Sep 2025 14:59:51 +0200
Subject: [PATCH] feat(Viber): Add `Hide navigation buttons` patch (#5991)

---
 patches/api/patches.api                       |  4 +
 .../patches/viber/misc/navbar/Fingerprints.kt | 16 ++++
 .../misc/navbar/HideNavigationButtons.kt      | 85 +++++++++++++++++++
 3 files changed, 105 insertions(+)
 create mode 100644 patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/Fingerprints.kt
 create mode 100644 patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/HideNavigationButtons.kt

diff --git a/patches/api/patches.api b/patches/api/patches.api
index 7ac39ad52..ae0c1a588 100644
--- a/patches/api/patches.api
+++ b/patches/api/patches.api
@@ -1306,6 +1306,10 @@ public final class app/revanced/patches/viber/ads/HideAdsPatchKt {
 	public static final fun getHideAdsPatch ()Lapp/revanced/patcher/patch/BytecodePatch;
 }
 
+public final class app/revanced/patches/viber/misc/navbar/HideNavigationButtonsKt {
+	public static final fun getHideNavigationButtonsPatch ()Lapp/revanced/patcher/patch/BytecodePatch;
+}
+
 public final class app/revanced/patches/vsco/misc/pro/UnlockProPatchKt {
 	public static final fun getUnlockProPatch ()Lapp/revanced/patcher/patch/BytecodePatch;
 }
diff --git a/patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/Fingerprints.kt b/patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/Fingerprints.kt
new file mode 100644
index 000000000..2f2a7bda3
--- /dev/null
+++ b/patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/Fingerprints.kt
@@ -0,0 +1,16 @@
+package app.revanced.patches.viber.misc.navbar
+import app.revanced.patcher.fingerprint
+import app.revanced.patcher.patch.BytecodePatchContext
+
+internal val tabIdClassFingerprint = fingerprint {
+    strings("shouldShowTabId")
+}
+
+context(BytecodePatchContext)
+internal val shouldShowTabIdMethodFingerprint get() = fingerprint {
+    parameters("I", "I")
+    returns("Z")
+    custom { methodDef, classDef ->
+        classDef == tabIdClassFingerprint.classDef
+    }
+}
diff --git a/patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/HideNavigationButtons.kt b/patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/HideNavigationButtons.kt
new file mode 100644
index 000000000..a4aa3e4a0
--- /dev/null
+++ b/patches/src/main/kotlin/app/revanced/patches/viber/misc/navbar/HideNavigationButtons.kt
@@ -0,0 +1,85 @@
+package app.revanced.patches.viber.misc.navbar
+
+import app.revanced.patcher.extensions.InstructionExtensions.addInstructionsWithLabels
+import app.revanced.patcher.patch.booleanOption
+import app.revanced.patcher.patch.bytecodePatch
+import java.util.logging.Logger
+import kotlin.collections.joinToString
+
+
+private const val instructionsFooter = """
+    # If we reach this, it means that this tab has been disabled by user
+    const/4 v0, 0
+    return v0  # return false as "This tab is not enabled"
+           
+    # Proceed with default execution
+    :continue
+    nop
+"""
+
+@Suppress("unused")
+val hideNavigationButtonsPatch = bytecodePatch(
+    name = "Hide navigation buttons",
+    description = "Permanently hides navigation bar buttons, such as Explore and Marketplace.",
+    use = false
+) {
+    compatibleWith("com.viber.voip")
+
+    val hideOptions = AllowedNavigationItems.entries.associateWith {
+        booleanOption(
+            key = it.key,
+            default = it.defaultHideOption,
+            title = it.title,
+            description = it.description,
+        )
+    }
+
+    execute {
+        // Items that won't be forcefully hidden.
+        val allowedItems = hideOptions.filter { (option, enabled) -> enabled.value != true }
+
+        if (allowedItems.size == AllowedNavigationItems.entries.size) {
+            return@execute Logger.getLogger(this::class.java.name).warning(
+                "No hide navigation buttons options are enabled. No changes made."
+            )
+        }
+
+        val injectionInstructions = allowedItems
+            .map { it.key.buildAllowInstruction() }
+            .joinToString("\n") + instructionsFooter
+
+        shouldShowTabIdMethodFingerprint
+            .method
+            .addInstructionsWithLabels(0, injectionInstructions)
+    }
+}
+
+/**
+ * Navigation items taken from source code.
+ * They appear in code like new NavigationItem(0, R.string.bottom_tab_chats, R.drawable.ic_tab_chats).
+ */
+private enum class AllowedNavigationItems(
+    val defaultHideOption: Boolean,
+    private val itemName: String,
+    private vararg val ids: Int
+) {
+    CHATS(false, "Chats", 0),
+    CALLS(false, "Calls", 1, 7),
+    EXPLORE(true, "Explore", 2),
+    MORE(false, "More", 3),
+    PAY(true, "Pay", 5),
+    CAMERA(true, "Camera", 6),
+    MARKETPLACE(true, "Marketplace", 8);
+
+    val key = "hide$itemName"
+    val title = "Hide $itemName"
+    val description = "Permanently hides the $itemName button."
+
+    fun buildAllowInstruction(): String =
+        ids.joinToString("\n") { id ->
+            """
+            const/4 v0, $id  # If tabId == $id ($itemName), don't hide it
+            if-eq p1, v0, :continue
+            """
+        }
+}