Support opening of Web Apps from the side menu and internalLinkTypeSideMenuBot links.

td/generate/scheme/td_api.tl

@@ -7026,9 +7026,9 @@ searchWebApp bot_user_id:int53 web_app_short_name:string = FoundWebApp;
 //@allow_write_access Pass true if the current user allowed the bot to send them messages
 getWebAppLinkUrl chat_id:int53 bot_user_id:int53 web_app_short_name:string start_parameter:string theme:themeParameters application_name:string allow_write_access:Bool = HttpUrl;
 
-//@description Returns an HTTPS URL of a Web App to open after keyboardButtonTypeWebApp or inlineQueryResultsButtonTypeWebApp button is pressed
+//@description Returns an HTTPS URL of a Web App to open from the side menu, a keyboardButtonTypeWebApp button, an inlineQueryResultsButtonTypeWebApp button, or an internalLinkTypeSideMenuBot link
 //@bot_user_id Identifier of the target bot
-//@url The URL from the keyboardButtonTypeWebApp or inlineQueryResultsButtonTypeWebApp button
+//@url The URL from a keyboardButtonTypeWebApp button, inlineQueryResultsButtonTypeWebApp button, an internalLinkTypeSideMenuBot link, or an empty when the bot is opened from the side menu
 //@theme Preferred Web App theme; pass null to use the default theme
 //@application_name Short name of the application; 0-64 English letters, digits, and underscores
 getWebAppUrl bot_user_id:int53 url:string theme:themeParameters application_name:string = HttpUrl;
@@ -7043,7 +7043,7 @@ sendWebAppData bot_user_id:int53 button_text:string data:string = Ok;
 //-For each bot, a confirmation alert about data sent to the bot must be shown once
 //@chat_id Identifier of the chat in which the Web App is opened. The Web App can't be opened in secret chats
 //@bot_user_id Identifier of the bot, providing the Web App
-//@url The URL from an inlineKeyboardButtonTypeWebApp button, a botMenuButton button, or an internalLinkTypeAttachmentMenuBot link, or an empty string otherwise
+//@url The URL from an inlineKeyboardButtonTypeWebApp button, a botMenuButton button, an internalLinkTypeAttachmentMenuBot link, or an empty string otherwise
 //@theme Preferred Web App theme; pass null to use the default theme
 //@application_name Short name of the application; 0-64 English letters, digits, and underscores
 //@message_thread_id If not 0, a message thread identifier in which the message will be sent

td/telegram/InlineQueriesManager.cpp

@@ -176,27 +176,40 @@ class RequestSimpleWebViewQuery final : public Td::ResultHandler {
   explicit RequestSimpleWebViewQuery(Promise<string> &&promise) : promise_(std::move(promise)) {
   }
 
-  void send(tl_object_ptr<telegram_api::InputUser> &&input_user, const string &url,
+  void send(tl_object_ptr<telegram_api::InputUser> &&input_user, string url,
             const td_api::object_ptr<td_api::themeParameters> &theme, string &&platform) {
     tl_object_ptr<telegram_api::dataJSON> theme_parameters;
-    int32 flags = telegram_api::messages_requestSimpleWebView::URL_MASK;
+    int32 flags = 0;
     if (theme != nullptr) {
       flags |= telegram_api::messages_requestSimpleWebView::THEME_PARAMS_MASK;
 
       theme_parameters = make_tl_object<telegram_api::dataJSON>(string());
       theme_parameters->data_ = ThemeManager::get_theme_parameters_json_string(theme, false);
     }
+    string start_parameter;
     if (ends_with(url, "#kb")) {
       // a URL from keyboard button
+      url.resize(url.size() - 3);
+      flags |= telegram_api::messages_requestSimpleWebView::URL_MASK;
     } else if (ends_with(url, "#iq")) {
       // a URL from inline query results button
+      url.resize(url.size() - 3);
       flags |= telegram_api::messages_requestSimpleWebView::FROM_SWITCH_WEBVIEW_MASK;
+      flags |= telegram_api::messages_requestSimpleWebView::URL_MASK;
+    } else if (url.empty()) {
+      flags |= telegram_api::messages_requestSimpleWebView::FROM_SIDE_MENU_MASK;
+    } else if (begins_with(url, "start://")) {
+      start_parameter = url.substr(8);
+      url = string();
+
+      flags |= telegram_api::messages_requestSimpleWebView::FROM_SIDE_MENU_MASK;
+      flags |= telegram_api::messages_requestSimpleWebView::START_PARAM_MASK;
     } else {
       return on_error(Status::Error(400, "Invalid URL specified"));
     }
-    send_query(G()->net_query_creator().create(telegram_api::messages_requestSimpleWebView(
+    send_query(G()->net_query_creator().create(
-        flags, false /*ignored*/, false /*ignored*/, std::move(input_user), url.substr(0, url.size() - 3), string(),
+        telegram_api::messages_requestSimpleWebView(flags, false /*ignored*/, false /*ignored*/, std::move(input_user),
-        std::move(theme_parameters), platform)));
+                                                    url, start_parameter, std::move(theme_parameters), platform)));
   }
 
   void on_result(BufferSlice packet) final {
@@ -547,7 +560,7 @@ void InlineQueriesManager::get_simple_web_view_url(UserId bot_user_id, string &&
   TRY_RESULT_PROMISE(promise, bot_data, td_->contacts_manager_->get_bot_data(bot_user_id));
 
   td_->create_handler<RequestSimpleWebViewQuery>(std::move(promise))
-      ->send(std::move(input_user), url, theme, std::move(platform));
+      ->send(std::move(input_user), std::move(url), theme, std::move(platform));
 }
 
 void InlineQueriesManager::send_web_view_data(UserId bot_user_id, string &&button_text, string &&data,