From 82a372873faf1210544e98a1b0ff5a0acfd96c64 Mon Sep 17 00:00:00 2001
From: John Preston <johnprestonmail@gmail.com>
Date: Fri, 8 May 2020 13:00:12 +0400
Subject: [PATCH] Add two local urls to open language selection box.

tg://setlanguage and tg://settings/language

Fixes #7831.
---
 .../SourceFiles/core/local_url_handlers.cpp   | 21 +++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/Telegram/SourceFiles/core/local_url_handlers.cpp b/Telegram/SourceFiles/core/local_url_handlers.cpp
index 03cb2ee9e3..f613e62a33 100644
--- a/Telegram/SourceFiles/core/local_url_handlers.cpp
+++ b/Telegram/SourceFiles/core/local_url_handlers.cpp
@@ -21,6 +21,7 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "boxes/connection_box.h"
 #include "boxes/sticker_set_box.h"
 #include "boxes/sessions_box.h"
+#include "boxes/language_box.h"
 #include "passport/passport_form_controller.h"
 #include "window/window_session_controller.h"
 #include "data/data_session.h"
@@ -101,12 +102,21 @@ bool ShowTheme(
 	return true;
 }
 
+void ShowLanguagesBox() {
+	static auto Guard = base::binary_guard();
+	Guard = LanguageBox::Show();
+}
+
 bool SetLanguage(
 		Main::Session *session,
 		const Match &match,
 		const QVariant &context) {
-	const auto languageId = match->captured(1);
-	Lang::CurrentCloudManager().switchWithWarning(languageId);
+	if (match->capturedRef(1).isEmpty()) {
+		ShowLanguagesBox();
+	} else {
+		const auto languageId = match->captured(2);
+		Lang::CurrentCloudManager().switchWithWarning(languageId);
+	}
 	return true;
 }
 
@@ -351,6 +361,9 @@ bool ResolveSettings(
 	if (section == qstr("devices")) {
 		Ui::show(Box<SessionsBox>(session));
 		return true;
+	} else if (section == qstr("language")) {
+		ShowLanguagesBox();
+		return true;
 	}
 	const auto type = (section == qstr("folders"))
 		? ::Settings::Type::Folders
@@ -441,7 +454,7 @@ const std::vector<LocalUrlHandler> &LocalUrlHandlers() {
 			ShowTheme
 		},
 		{
-			qsl("^setlanguage/?\\?lang=([a-zA-Z0-9\\.\\_\\-]+)(&|$)"),
+			qsl("^setlanguage/?(\\?lang=([a-zA-Z0-9\\.\\_\\-]+))?(&|$)"),
 			SetLanguage
 		},
 		{
@@ -481,7 +494,7 @@ const std::vector<LocalUrlHandler> &LocalUrlHandlers() {
 			ResolvePrivatePost
 		},
 		{
-			qsl("^settings(/folders|/devices)?$"),
+			qsl("^settings(/folders|/devices|/language)?$"),
 			ResolveSettings
 		},
 		{