Support "date_time" entities in incoming requests.

telegram-bot-api/Client.cpp

@@ -11052,6 +11052,48 @@ td::Result<td_api::object_ptr<td_api::TextEntityType>> Client::get_text_entity_t
   if (type == "expandable_blockquote") {
     return make_object<td_api::textEntityTypeExpandableBlockQuote>();
   }
+  if (type == "date_time") {
+    TRY_RESULT(unix_time, object.get_required_int_field("unix_time"));
+    TRY_RESULT(format, object.get_optional_string_field("date_time_format"));
+    bool is_invalid = false;
+    auto formatting_type = [&format, &is_invalid]() -> object_ptr<td_api::DateTimeFormattingType> {
+      if (format.empty()) {
+        return nullptr;
+      }
+      if (format == "r" || format == "R") {
+        return make_object<td_api::dateTimeFormattingTypeRelative>();
+      }
+      auto result = make_object<td_api::dateTimeFormattingTypeAbsolute>();
+      for (auto c : format) {
+        switch (c) {
+          case 't':
+            result->time_precision_ = make_object<td_api::dateTimePartPrecisionShort>();
+            break;
+          case 'T':
+            result->time_precision_ = make_object<td_api::dateTimePartPrecisionLong>();
+            break;
+          case 'd':
+            result->date_precision_ = make_object<td_api::dateTimePartPrecisionShort>();
+            break;
+          case 'D':
+            result->date_precision_ = make_object<td_api::dateTimePartPrecisionLong>();
+            break;
+          case 'w':
+          case 'W':
+            result->show_day_of_week_ = true;
+            break;
+          default:
+            is_invalid = true;
+            break;
+        }
+      }
+      return std::move(result);
+    }();
+    if (is_invalid) {
+      return td::Status::Error(400, "Invalid date-time format specified");
+    }
+    return make_object<td_api::textEntityTypeDateTime>(unix_time, std::move(formatting_type));
+  }
   if (type == "mention" || type == "hashtag" || type == "cashtag" || type == "bot_command" || type == "url" ||
       type == "email" || type == "phone_number" || type == "bank_card_number") {
     return nullptr;