Support permanent invite links.

td/generate/scheme/td_api.tl

@@ -887,8 +887,9 @@ chatsNearby users_nearby:vector<chatNearby> supergroups_nearby:vector<chatNearby
 //@description Contains a chat invite link @invite_link Chat invite link @administrator_user_id User identifier of an administrator created the link
 //@date Point in time (Unix timestamp) when the link was created @expire_date Point in time (Unix timestamp) when the link will expire; 0 if never
 //@usage_limit Maximum number of times the link can be used; 0 if not limited @usage_count Number of times the link has already been used
+//@is_permanent True, if the link is permanent. Permanent invite link can't have expire date or usage limit. There is exactly one permanent invite link for each administrator at any time
 //@is_expired True, if the link is already expired @is_revoked True, if the link was revoked
-chatInviteLink invite_link:string administrator_user_id:int32 date:int32 expire_date:int32 usage_limit:int32 usage_count:int32 is_expired:Bool is_revoked:Bool = ChatInviteLink;
+chatInviteLink invite_link:string administrator_user_id:int32 date:int32 expire_date:int32 usage_limit:int32 usage_count:int32 is_permanent:Bool is_expired:Bool is_revoked:Bool = ChatInviteLink;
 
 //@description Contains information about a chat invite link
 //@chat_id Chat identifier of the invite link; 0 if the user has no access to the chat before joining
@@ -4353,7 +4354,8 @@ deleteFile file_id:int32 = Ok;
 //@chat_id Chat identifier
 //@expire_date Point in time (Unix timestamp) when the link will expire; pass 0 if never
 //@usage_limit Maximum number of times the link can be used; pass 0 if not limited
-createChatInviteLink chat_id:int53 expire_date:int32 usage_limit:int32 = ChatInviteLink;
+//@is_permanent True, if new permanent chat link needs to be created instead of the previous
+createChatInviteLink chat_id:int53 expire_date:int32 usage_limit:int32 is_permanent:Bool = ChatInviteLink;
 
 //@description Edits an invite link for a chat. Available for basic groups, supergroups, and channels. Requires administrator privileges and can_invite_users right
 //@chat_id Chat identifier

td/telegram/ContactsManager.cpp

@@ -1544,7 +1544,7 @@ class ExportChatInviteLinkQuery : public Td::ResultHandler {
       : promise_(std::move(promise)) {
   }
 
-  void send(DialogId dialog_id, int32 expire_date, int32 usage_limit) {
+  void send(DialogId dialog_id, int32 expire_date, int32 usage_limit, bool is_permanent) {
     dialog_id_ = dialog_id;
     auto input_peer = td->messages_manager_->get_input_peer(dialog_id, AccessRights::Read);
     if (input_peer == nullptr) {
@@ -1558,6 +1558,9 @@ class ExportChatInviteLinkQuery : public Td::ResultHandler {
     if (usage_limit > 0) {
       flags |= telegram_api::messages_exportChatInvite::USAGE_LIMIT_MASK;
     }
+    if (is_permanent) {
+      flags |= telegram_api::messages_exportChatInvite::LEGACY_REVOKE_PERMANENT_MASK;
+    }
     send_query(G()->net_query_creator().create(telegram_api::messages_exportChatInvite(
         flags, false /*ignored*/, std::move(input_peer), expire_date, usage_limit)));
   }
@@ -1582,8 +1585,8 @@ class ExportChatInviteLinkQuery : public Td::ResultHandler {
   }
 
   void on_error(uint64 id, Status status) override {
+    td->messages_manager_->on_get_dialog_error(dialog_id_, status, "ExportChatInviteLinkQuery");
     promise_.set_error(std::move(status));
-    td->updates_manager_->get_difference("ExportChatInviteLinkQuery");
   }
 };
 
@@ -1636,8 +1639,8 @@ class EditChatInviteLinkQuery : public Td::ResultHandler {
   }
 
   void on_error(uint64 id, Status status) override {
+    td->messages_manager_->on_get_dialog_error(dialog_id_, status, "EditChatInviteLinkQuery");
     promise_.set_error(std::move(status));
-    td->updates_manager_->get_difference("EditChatInviteLinkQuery");
   }
 };
 
@@ -6568,21 +6571,23 @@ Status ContactsManager::can_manage_dialog_invite_links(DialogId dialog_id) {
 }
 
 void ContactsManager::export_dialog_invite_link(DialogId dialog_id, int32 expire_date, int32 usage_limit,
+                                                bool is_permanent,
                                                 Promise<td_api::object_ptr<td_api::chatInviteLink>> &&promise) {
   LOG(INFO) << "Receive CreateDialogInviteLink request for " << dialog_id;
 
-  get_me(PromiseCreator::lambda([actor_id = actor_id(this), dialog_id, expire_date, usage_limit,
+  get_me(PromiseCreator::lambda([actor_id = actor_id(this), dialog_id, expire_date, usage_limit, is_permanent,
                                  promise = std::move(promise)](Result<Unit> &&result) mutable {
     if (result.is_error()) {
       promise.set_error(result.move_as_error());
     } else {
       send_closure(actor_id, &ContactsManager::export_dialog_invite_link_impl, dialog_id, expire_date, usage_limit,
-                   std::move(promise));
+                   is_permanent, std::move(promise));
     }
   }));
 }
 
 void ContactsManager::export_dialog_invite_link_impl(DialogId dialog_id, int32 expire_date, int32 usage_limit,
+                                                     bool is_permanent,
                                                      Promise<td_api::object_ptr<td_api::chatInviteLink>> &&promise) {
   if (G()->close_flag()) {
     return promise.set_error(Status::Error(500, "Request aborted"));
@@ -6590,7 +6595,8 @@ void ContactsManager::export_dialog_invite_link_impl(DialogId dialog_id, int32 e
 
   TRY_STATUS_PROMISE(promise, can_manage_dialog_invite_links(dialog_id));
 
-  td_->create_handler<ExportChatInviteLinkQuery>(std::move(promise))->send(dialog_id, expire_date, usage_limit);
+  td_->create_handler<ExportChatInviteLinkQuery>(std::move(promise))
+      ->send(dialog_id, expire_date, usage_limit, is_permanent);
 }
 
 void ContactsManager::edit_dialog_invite_link(DialogId dialog_id, const string &invite_link, int32 expire_date,

td/telegram/ContactsManager.h

@@ -389,7 +389,7 @@ class ContactsManager : public Actor {
 
   void transfer_dialog_ownership(DialogId dialog_id, UserId user_id, const string &password, Promise<Unit> &&promise);
 
-  void export_dialog_invite_link(DialogId dialog_id, int32 expire_date, int32 usage_limit,
+  void export_dialog_invite_link(DialogId dialog_id, int32 expire_date, int32 usage_limit, bool is_permanent,
                                  Promise<td_api::object_ptr<td_api::chatInviteLink>> &&promise);
 
   void edit_dialog_invite_link(DialogId dialog_id, const string &link, int32 expire_date, int32 usage_limit,
@@ -1345,7 +1345,7 @@ class ContactsManager : public Actor {
 
   static bool is_channel_public(const Channel *c);
 
-  void export_dialog_invite_link_impl(DialogId dialog_id, int32 expire_date, int32 usage_limit,
+  void export_dialog_invite_link_impl(DialogId dialog_id, int32 expire_date, int32 usage_limit, bool is_permanent,
                                       Promise<td_api::object_ptr<td_api::chatInviteLink>> &&promise);
 
   void remove_dialog_access_by_invite_link(DialogId dialog_id);

td/telegram/DialogInviteLink.cpp

@@ -48,6 +48,14 @@ DialogInviteLink::DialogInviteLink(tl_object_ptr<telegram_api::chatInviteExporte
       usage_count_ = 0;
     }
   }
+  is_revoked_ = exported_invite->revoked_;
+  is_permanent_ = exported_invite->permanent_;
+
+  if (is_permanent_ && (usage_limit_ > 0 || expire_date_ > 0)) {
+    LOG(ERROR) << "Receive wron permanent " << *this;
+    expire_date_ = 0;
+    usage_limit_ = 0;
+  }
 }
 
 bool DialogInviteLink::is_expired() const {
@@ -74,13 +82,14 @@ td_api::object_ptr<td_api::chatInviteLink> DialogInviteLink::get_chat_invite_lin
 
   return td_api::make_object<td_api::chatInviteLink>(
       invite_link_, contacts_manager->get_user_id_object(administrator_user_id_, "get_chat_invite_link_object"), date_,
-      expire_date_, usage_limit_, usage_count_, is_expired(), is_revoked_);
+      expire_date_, usage_limit_, usage_count_, is_permanent_, is_expired(), is_revoked_);
 }
 
 bool operator==(const DialogInviteLink &lhs, const DialogInviteLink &rhs) {
   return lhs.invite_link_ == rhs.invite_link_ && lhs.administrator_user_id_ == rhs.administrator_user_id_ &&
          lhs.date_ == rhs.date_ && lhs.expire_date_ == rhs.expire_date_ && lhs.usage_limit_ == rhs.usage_limit_ &&
-         lhs.usage_count_ == rhs.usage_count_ && lhs.is_revoked_ == rhs.is_revoked_;
+         lhs.usage_count_ == rhs.usage_count_ && lhs.is_permanent_ == rhs.is_permanent_ &&
+         lhs.is_revoked_ == rhs.is_revoked_;
 }
 
 bool operator!=(const DialogInviteLink &lhs, const DialogInviteLink &rhs) {

td/telegram/DialogInviteLink.h

@@ -26,6 +26,7 @@ class DialogInviteLink {
   int32 usage_limit_ = 0;
   int32 usage_count_ = 0;
   bool is_revoked_ = false;
+  bool is_permanent_ = false;
 
   friend bool operator==(const DialogInviteLink &lhs, const DialogInviteLink &rhs);
 
@@ -58,6 +59,7 @@ class DialogInviteLink {
     bool has_usage_count = usage_count_ != 0;
     BEGIN_STORE_FLAGS();
     STORE_FLAG(is_revoked_);
+    STORE_FLAG(is_permanent_);
     STORE_FLAG(has_expire_date);
     STORE_FLAG(has_usage_limit);
     STORE_FLAG(has_usage_count);
@@ -84,6 +86,7 @@ class DialogInviteLink {
     bool has_usage_count;
     BEGIN_PARSE_FLAGS();
     PARSE_FLAG(is_revoked_);
+    PARSE_FLAG(is_permanent_);
     PARSE_FLAG(has_expire_date);
     PARSE_FLAG(has_usage_limit);
     PARSE_FLAG(has_usage_count);

td/telegram/Td.cpp

@@ -6278,7 +6278,7 @@ void Td::on_request(uint64 id, td_api::getChatAdministrators &request) {
 void Td::on_request(uint64 id, const td_api::createChatInviteLink &request) {
   CREATE_REQUEST_PROMISE();
   contacts_manager_->export_dialog_invite_link(DialogId(request.chat_id_), request.expire_date_, request.usage_limit_,
-                                               std::move(promise));
+                                               request.is_permanent_, std::move(promise));
 }
 
 void Td::on_request(uint64 id, td_api::editChatInviteLink &request) {

td/telegram/cli.cpp

@@ -2682,12 +2682,13 @@ class CliClient final : public Actor {
       send_request(td_api::make_object<td_api::leaveGroupCall>(as_group_call_id(args)));
     } else if (op == "dgc") {
       send_request(td_api::make_object<td_api::discardGroupCall>(as_group_call_id(args)));
-    } else if (op == "gcil") {
+    } else if (op == "ccilp" || op == "ccilt") {
       string chat_id;
       int32 expire_date;
       int32 usage_limit;
       get_args(args, chat_id, expire_date, usage_limit);
-      send_request(td_api::make_object<td_api::createChatInviteLink>(as_chat_id(chat_id), expire_date, usage_limit));
+      send_request(td_api::make_object<td_api::createChatInviteLink>(as_chat_id(chat_id), expire_date, usage_limit,
+                                                                     op == "ccilp"));
     } else if (op == "ecil") {
       string chat_id;
       string invite_link;