Add DialogFilterId class.

GitOrigin-RevId: 050b0934a7646e3bdefa5875bb922b7dce06c408

CMakeLists.txt

@@ -547,6 +547,7 @@ set(TDLIB_SOURCE
   td/telegram/DialogAdministrator.h
   td/telegram/DialogDate.h
   td/telegram/DialogDb.h
+  td/telegram/DialogFilterId.h
   td/telegram/DialogId.h
   td/telegram/DialogLocation.h
   td/telegram/DialogParticipant.h

td/telegram/DialogFilterId.h

@@ -0,0 +1,65 @@
+//
+// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2020
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+#pragma once
+
+#include "td/utils/common.h"
+#include "td/utils/StringBuilder.h"
+
+#include <functional>
+#include <type_traits>
+
+namespace td {
+
+class DialogFilterId {
+  int32 id = 0;
+
+ public:
+  DialogFilterId() = default;
+
+  explicit DialogFilterId(int32 dialog_filter_id) : id(dialog_filter_id) {
+  }
+  template <class T, typename = std::enable_if_t<std::is_convertible<T, int32>::value>>
+  DialogFilterId(T dialog_filter_id) = delete;
+
+  bool is_valid() const {
+    return id > 0;
+  }
+
+  int32 get() const {
+    return id;
+  }
+
+  bool operator==(const DialogFilterId &other) const {
+    return id == other.id;
+  }
+
+  bool operator!=(const DialogFilterId &other) const {
+    return id != other.id;
+  }
+
+  template <class StorerT>
+  void store(StorerT &storer) const {
+    storer.store_int(id);
+  }
+
+  template <class ParserT>
+  void parse(ParserT &parser) {
+    id = parser.fetch_int();
+  }
+};
+
+struct DialogFilterIdHash {
+  std::size_t operator()(DialogFilterId dialog_filter_id) const {
+    return std::hash<int32>()(dialog_filter_id.get());
+  }
+};
+
+inline StringBuilder &operator<<(StringBuilder &string_builder, DialogFilterId dialog_filter_id) {
+  return string_builder << "chat filter " << dialog_filter_id.get();
+}
+
+}  // namespace td

td/telegram/MessagesManager.h

@@ -16,6 +16,7 @@
 #include "td/telegram/DialogAdministrator.h"
 #include "td/telegram/DialogDate.h"
 #include "td/telegram/DialogDb.h"
+#include "td/telegram/DialogFilterId.h"
 #include "td/telegram/DialogId.h"
 #include "td/telegram/DialogLocation.h"
 #include "td/telegram/DialogParticipant.h"