rpl::producer<bool> CanAddMemberValue(
not_null<PeerData*> peer) {
if (auto chat = peer->asChat()) {
return Notify::PeerUpdateValue(
chat,
Notify::PeerUpdate::Flag::ChatCanEdit
) | rpl::map([chat] {
return chat->canEdit();
});
} else if (auto channel = peer->asChannel()) {
return Notify::PeerUpdateValue(
channel,
Notify::PeerUpdate::Flag::ChannelRightsChanged
) | rpl::map([channel] {
return channel->canAddMembers();
});
}
return rpl::single(false);
}
rpl::producer<int> MembersCountValue(
not_null<PeerData*> peer) {
if (auto chat = peer->asChat()) {
return Notify::PeerUpdateValue(
peer,
Notify::PeerUpdate::Flag::MembersChanged
) | rpl::map([chat] {
return chat->amIn()
? std::max(chat->count, int(chat->participants.size()))
: 0;
});
} else if (auto channel = peer->asChannel()) {
return Notify::PeerUpdateValue(
channel,
Notify::PeerUpdate::Flag::MembersChanged
) | rpl::map([channel] {
return channel->membersCount();
});
}
Unexpected("User in MembersCountViewer().");
}