From ad98601954f5593887a5cd21b3442d5eddda5901 Mon Sep 17 00:00:00 2001
From: inotia00 <108592928+inotia00@users.noreply.github.com>
Date: Tue, 12 Dec 2023 18:21:34 +0900
Subject: [PATCH] feat(YouTube): add `Change start page` patch

---
 .../general/startpage/ChangeStartPagePatch.kt | 78 +++++++++++++++++++
 .../fingerprints/StartActivityFingerprint.kt  | 11 +++
 .../youtube/settings/host/values/strings.xml  | 12 +++
 .../youtube/settings/xml/revanced_prefs.xml   |  4 +
 .../youtube/startpage/host/values/arrays.xml  | 29 +++++++
 5 files changed, 134 insertions(+)
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/general/startpage/ChangeStartPagePatch.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/general/startpage/fingerprints/StartActivityFingerprint.kt
 create mode 100644 src/main/resources/youtube/startpage/host/values/arrays.xml

diff --git a/src/main/kotlin/app/revanced/patches/youtube/general/startpage/ChangeStartPagePatch.kt b/src/main/kotlin/app/revanced/patches/youtube/general/startpage/ChangeStartPagePatch.kt
new file mode 100644
index 000000000..26f299df3
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/general/startpage/ChangeStartPagePatch.kt
@@ -0,0 +1,78 @@
+package app.revanced.patches.youtube.general.startpage
+
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.InstructionExtensions.addInstruction
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.annotation.CompatiblePackage
+import app.revanced.patcher.patch.annotation.Patch
+import app.revanced.patches.youtube.general.startpage.fingerprints.StartActivityFingerprint
+import app.revanced.patches.youtube.utils.integrations.Constants.GENERAL
+import app.revanced.patches.youtube.utils.settings.SettingsPatch
+import app.revanced.patches.youtube.utils.settings.SettingsPatch.contexts
+import app.revanced.util.copyXmlNode
+import app.revanced.util.exception
+
+@Patch(
+    name = "Change start page",
+    description = "Changes the start page of the app.",
+    dependencies = [SettingsPatch::class],
+    compatiblePackages = [
+        CompatiblePackage(
+            "com.google.android.youtube",
+            [
+                "18.25.40",
+                "18.27.36",
+                "18.29.38",
+                "18.30.37",
+                "18.31.40",
+                "18.32.39",
+                "18.33.40",
+                "18.34.38",
+                "18.35.36",
+                "18.36.39",
+                "18.37.36",
+                "18.38.44",
+                "18.39.41",
+                "18.40.34",
+                "18.41.39",
+                "18.42.41",
+                "18.43.45",
+                "18.44.41",
+                "18.45.43"
+            ]
+        )
+    ]
+)
+@Suppress("unused")
+object ChangeStartPagePatch : BytecodePatch(
+    setOf(StartActivityFingerprint)
+) {
+    override fun execute(context: BytecodeContext) {
+        StartActivityFingerprint.result?.let {
+            it.mutableMethod.apply {
+                addInstruction(
+                    0,
+                    "invoke-static { p1 }, $GENERAL->changeStartPage(Landroid/content/Intent;)V"
+                )
+            }
+        } ?: throw StartActivityFingerprint.exception
+
+        /**
+         * Copy arrays
+         */
+        contexts.copyXmlNode("youtube/startpage/host", "values/arrays.xml", "resources")
+
+        /**
+         * Add settings
+         */
+        SettingsPatch.addPreference(
+            arrayOf(
+                "PREFERENCE: GENERAL_SETTINGS",
+                "SETTINGS: CHANGE_START_PAGE"
+            )
+        )
+
+        SettingsPatch.updatePatchStatus("Change start page")
+
+    }
+}
diff --git a/src/main/kotlin/app/revanced/patches/youtube/general/startpage/fingerprints/StartActivityFingerprint.kt b/src/main/kotlin/app/revanced/patches/youtube/general/startpage/fingerprints/StartActivityFingerprint.kt
new file mode 100644
index 000000000..7f305ec6f
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/general/startpage/fingerprints/StartActivityFingerprint.kt
@@ -0,0 +1,11 @@
+package app.revanced.patches.youtube.general.startpage.fingerprints
+
+import app.revanced.patcher.fingerprint.MethodFingerprint
+
+object StartActivityFingerprint : MethodFingerprint(
+    parameters = listOf("Landroid/content/Intent;"),
+    customFingerprint = { methodDef, classDef ->
+        methodDef.name == "startActivity"
+                && classDef.type.endsWith("/Shell_HomeActivity;")
+    }
+)
\ No newline at end of file
diff --git a/src/main/resources/youtube/settings/host/values/strings.xml b/src/main/resources/youtube/settings/host/values/strings.xml
index 944c3e296..fe73e5624 100644
--- a/src/main/resources/youtube/settings/host/values/strings.xml
+++ b/src/main/resources/youtube/settings/host/values/strings.xml
@@ -58,6 +58,18 @@ Tap here to learn more about DeArrow."</string>
     <string name="revanced_change_homepage_summary_off">Current homepage: Home.</string>
     <string name="revanced_change_homepage_summary_on">Current homepage: Subscriptions.</string>
     <string name="revanced_change_homepage_title">Change homepage to subscriptions</string>
+    <string name="revanced_change_start_page_entry_default">Default</string>
+    <string name="revanced_change_start_page_entry_explore">Explore</string>
+    <string name="revanced_change_start_page_entry_history">History</string>
+    <string name="revanced_change_start_page_entry_library">Library</string>
+    <string name="revanced_change_start_page_entry_liked_videos">Liked videos</string>
+    <string name="revanced_change_start_page_entry_podcasts">Podcasts</string>
+    <string name="revanced_change_start_page_entry_search">Search</string>
+    <string name="revanced_change_start_page_entry_shorts">Shorts</string>
+    <string name="revanced_change_start_page_entry_subscriptions">Subscriptions</string>
+    <string name="revanced_change_start_page_entry_trending">Trending</string>
+    <string name="revanced_change_start_page_title">Change start page</string>
+    <string name="revanced_change_start_page_warning">Invalid start page, resetting to default.</string>
     <string name="revanced_channel_bar_title">Channel bar</string>
     <string name="revanced_channel_profile_title">Channel profile</string>
     <string name="revanced_close_interstitial_ads_summary">"Automatically close interstitial ads.
diff --git a/src/main/resources/youtube/settings/xml/revanced_prefs.xml b/src/main/resources/youtube/settings/xml/revanced_prefs.xml
index 56a9016a7..0e2b47c78 100644
--- a/src/main/resources/youtube/settings/xml/revanced_prefs.xml
+++ b/src/main/resources/youtube/settings/xml/revanced_prefs.xml
@@ -175,6 +175,9 @@
     <PreferenceScreen android:title="@string/revanced_general" android:key="general">
         <Preference android:title=" " android:selectable="false" android:summary="@string/revanced_general" />PREFERENCE: GENERAL_SETTINGS -->
 
+        <!-- SETTINGS: CHANGE_START_PAGE
+        <ListPreference android:entries="@array/revanced_change_start_page_entry" android:title="@string/revanced_change_start_page_title" android:key="revanced_change_start_page" android:defaultValue="" android:entryValues="@array/revanced_change_start_page_entry_value" />SETTINGS: CHANGE_START_PAGE -->
+
         <!-- SETTINGS: DISABLE_AUTO_CAPTIONS
         <SwitchPreference android:title="@string/revanced_disable_auto_captions_title" android:key="revanced_disable_auto_captions" android:defaultValue="false" android:summaryOn="@string/revanced_disable_auto_captions_summary_on" android:summaryOff="@string/revanced_disable_auto_captions_summary_off" />SETTINGS: DISABLE_AUTO_CAPTIONS -->
 
@@ -395,6 +398,7 @@
             <Preference android:title="Quick actions components" android:summary="@string/revanced_patches_excluded" android:selectable="false"/>
 
             <Preference android:title=" " android:selectable="false" android:summary="@string/revanced_general" />
+            <Preference android:title="Change start page" android:summary="@string/revanced_patches_excluded" android:selectable="false"/>
             <Preference android:title="Disable auto captions" android:summary="@string/revanced_patches_excluded" android:selectable="false"/>
             <Preference android:title="Enable gradient loading screen" android:summary="@string/revanced_patches_excluded" android:selectable="false"/>
             <Preference android:title="Enable music search" android:summary="@string/revanced_patches_excluded" android:selectable="false"/>
diff --git a/src/main/resources/youtube/startpage/host/values/arrays.xml b/src/main/resources/youtube/startpage/host/values/arrays.xml
new file mode 100644
index 000000000..1bedc0f1b
--- /dev/null
+++ b/src/main/resources/youtube/startpage/host/values/arrays.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string-array name="revanced_change_start_page_entry">
+        <item>@string/revanced_change_start_page_entry_default</item>
+        <item>@string/revanced_change_start_page_entry_search</item>
+        <item>@string/revanced_change_start_page_entry_subscriptions</item>
+        <item>@string/revanced_change_start_page_entry_explore</item>
+        <item>@string/revanced_change_start_page_entry_shorts</item>
+        <item>@string/revanced_change_start_page_entry_library</item>
+        <item>@string/revanced_change_start_page_entry_liked_videos</item>
+        <item>@string/revanced_change_start_page_entry_history</item>
+        <item>@string/revanced_change_start_page_entry_trending</item>
+        <item>@string/revanced_change_start_page_entry_podcasts</item>
+    </string-array>
+    <string-array name="revanced_change_start_page_entry_value">
+        <item></item>
+        <!-- YouTube Shortcuts -->
+        <item>open.search</item>
+        <item>open.subscriptions</item>
+        <item>open.explore</item>
+        <item>open.shorts</item>
+        <!-- YouTube Widgets -->
+        <item>www.youtube.com/feed/library</item>
+        <item>www.youtube.com/playlist?list=LL</item>
+        <item>www.youtube.com/feed/history</item>
+        <item>www.youtube.com/feed/trending</item>
+        <item>www.youtube.com/podcasts</item>
+    </string-array>
+</resources>