Add time to the next open and close for business.

td/generate/scheme/td_api.tl

@@ -651,8 +651,8 @@ businessStartPage title:string message:string sticker:sticker = BusinessStartPag
 inputBusinessStartPage title:string message:string sticker:InputFile = InputBusinessStartPage;
 
 //@description Describes an interval of time when the business is open
-//@start_minute The first minute of the interval since start of the week; 0-7*24*60
-//@end_minute The first minute after the end of the interval since start of the week; 1-8*24*60
+//@start_minute The minute's sequence number in a week, starting on Monday, marking the start of the time interval during which the business is open; 0-7*24*60
+//@end_minute The minute's sequence number in a week, starting on Monday, marking the end of the time interval during which the business is open; 1-8*24*60
 businessOpeningHoursInterval start_minute:int32 end_minute:int32 = BusinessOpeningHoursInterval;
 
 //@description Describes opening hours of a business @time_zone_id Unique time zone identifier @opening_hours Intervals of the time when the business is open
@@ -661,11 +661,14 @@ businessOpeningHours time_zone_id:string opening_hours:vector<businessOpeningHou
 //@description Contains information about a Telegram Business account
 //@location Location of the business; may be null if none
 //@opening_hours Opening hours of the business; may be null if none. The hours are guaranteed to be valid and has already been split by week days
-//@local_opening_hours Opening hours of the business in the local time; may be null if none. The hours are guaranteed to be valid and has already been split by week days. Local time zone identifier will be empty
+//@local_opening_hours Opening hours of the business in the local time; may be null if none. The hours are guaranteed to be valid and has already been split by week days.
+//-Local time zone identifier will be empty. An updateUserFullInfo update is not triggered when value of this field changes
+//@next_open_in Time left before the business will open the next time, in seconds; 0 if unknown. An updateUserFullInfo update is not triggered when value of this field changes
+//@next_close_in Time left before the business will close the next time, in seconds; 0 if unknown. An updateUserFullInfo update is not triggered when value of this field changes
 //@greeting_message_settings The greeting message; may be null if none or the Business account is not of the current user
 //@away_message_settings The away message; may be null if none or the Business account is not of the current user
 //@start_page Information about start page of the account; may be null if none
-businessInfo location:businessLocation opening_hours:businessOpeningHours local_opening_hours:businessOpeningHours greeting_message_settings:businessGreetingMessageSettings away_message_settings:businessAwayMessageSettings start_page:businessStartPage = BusinessInfo;
+businessInfo location:businessLocation opening_hours:businessOpeningHours local_opening_hours:businessOpeningHours next_open_in:int32 next_close_in:int32 greeting_message_settings:businessGreetingMessageSettings away_message_settings:businessAwayMessageSettings start_page:businessStartPage = BusinessInfo;
 
 
 //@description Contains information about a business chat link

td/telegram/BusinessInfo.cpp

@@ -7,6 +7,7 @@
 #include "td/telegram/BusinessInfo.h"
 
 #include "td/telegram/Dependencies.h"
+#include "td/telegram/Global.h"
 
 namespace td {
 
@@ -14,9 +15,11 @@ td_api::object_ptr<td_api::businessInfo> BusinessInfo::get_business_info_object(
   if (is_empty()) {
     return nullptr;
   }
+  auto unix_time = G()->unix_time();
   return td_api::make_object<td_api::businessInfo>(
       location_.get_business_location_object(), work_hours_.get_business_opening_hours_object(),
-      work_hours_.get_local_business_opening_hours_object(td),
+      work_hours_.get_local_business_opening_hours_object(td), work_hours_.get_next_open_close_in(td, unix_time, false),
+      work_hours_.get_next_open_close_in(td, unix_time, true),
       greeting_message_.get_business_greeting_message_settings_object(td),
       away_message_.get_business_away_message_settings_object(td), intro_.get_business_start_page_object(td));
 }

td/telegram/BusinessWorkHours.cpp

@@ -80,9 +80,9 @@ td_api::object_ptr<td_api::businessOpeningHours> BusinessWorkHours::get_local_bu
     return nullptr;
   }
 
-  auto offset = narrow_cast<int32>((td->time_zone_manager_->get_time_zone_offset(time_zone_id_) -
-                 td->option_manager_->get_option_integer("utc_time_offset")) /
-                60);
+  auto offset = (td->time_zone_manager_->get_time_zone_offset(time_zone_id_) -
+                 narrow_cast<int32>(td->option_manager_->get_option_integer("utc_time_offset"))) /
+                60;
   if (offset == 0) {
     return get_business_opening_hours_object();
   }
@@ -124,6 +124,31 @@ telegram_api::object_ptr<telegram_api::businessWorkHours> BusinessWorkHours::get
       }));
 }
 
+int32 BusinessWorkHours::get_next_open_close_in(Td *td, int32 unix_time, bool is_close) const {
+  if (is_empty()) {
+    return 0;
+  }
+  auto get_week_time = [](int32 time) {
+    const auto week_length = 7 * 86400;
+    return ((time % week_length) + week_length) % week_length;
+  };
+  // the Unix time 0 was on a Thursday, the first Monday was at 4 * 86400
+  auto current_week_time = get_week_time(unix_time - 4 * 86400);
+  auto offset = td->time_zone_manager_->get_time_zone_offset(time_zone_id_);
+  int32 result = 1000000000;
+  for (auto &interval : work_hours_) {
+    auto change_week_time = get_week_time((is_close ? interval.end_minute_ : interval.start_minute_) * 60 - offset);
+    auto wait_time = change_week_time - current_week_time;
+    if (wait_time < 0) {
+      wait_time += 7 * 86400;
+    }
+    if (wait_time < result) {
+      result = wait_time;
+    }
+  }
+  return result;
+}
+
 void BusinessWorkHours::sanitize_work_hours() {
   // remove invalid work hour intervals
   td::remove_if(work_hours_, [](const WorkHoursInterval &interval) {

td/telegram/BusinessWorkHours.h

@@ -32,6 +32,8 @@ class BusinessWorkHours {
 
   telegram_api::object_ptr<telegram_api::businessWorkHours> get_input_business_work_hours() const;
 
+  int32 get_next_open_close_in(Td *td, int32 unix_time, bool is_close) const;
+
   template <class StorerT>
   void store(StorerT &storer) const;