tdesktop/Telegram/SourceFiles/data/data_channel.cpp

810 lines
24 KiB
C++

/*
This file is part of Telegram Desktop,
the official desktop application for the Telegram messaging service.
For license and copyright information please follow this link:
https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
*/
#include "data/data_channel.h"
#include "data/data_peer_values.h"
#include "data/data_channel_admins.h"
#include "data/data_user.h"
#include "data/data_chat.h"
#include "data/data_session.h"
#include "data/data_folder.h"
#include "data/data_location.h"
#include "base/unixtime.h"
#include "history/history.h"
#include "observer_peer.h"
#include "main/main_session.h"
#include "apiwrap.h"
namespace {
using UpdateFlag = Notify::PeerUpdate::Flag;
} // namespace
ChatData *MegagroupInfo::getMigrateFromChat() const {
return _migratedFrom;
}
void MegagroupInfo::setMigrateFromChat(ChatData *chat) {
_migratedFrom = chat;
}
const ChannelLocation *MegagroupInfo::getLocation() const {
return _location.address.isEmpty() ? nullptr : &_location;
}
void MegagroupInfo::setLocation(const ChannelLocation &location) {
_location = location;
}
ChannelData::ChannelData(not_null<Data::Session*> owner, PeerId id)
: PeerData(owner, id)
, inputChannel(MTP_inputChannel(MTP_int(bareId()), MTP_long(0))) {
Data::PeerFlagValue(
this,
MTPDchannel::Flag::f_megagroup
) | rpl::start_with_next([=](bool megagroup) {
if (megagroup) {
if (!mgInfo) {
mgInfo = std::make_unique<MegagroupInfo>();
}
} else if (mgInfo) {
mgInfo = nullptr;
}
}, _lifetime);
Data::PeerFlagsValue(
this,
MTPDchannel::Flag::f_left | MTPDchannel_ClientFlag::f_forbidden
) | rpl::distinct_until_changed(
) | rpl::start_with_next([=] {
if (const auto chat = getMigrateFromChat()) {
Notify::peerUpdatedDelayed(chat, UpdateFlag::MigrationChanged);
Notify::peerUpdatedDelayed(this, UpdateFlag::MigrationChanged);
}
}, _lifetime);
}
void ChannelData::setPhoto(const MTPChatPhoto &photo) {
setPhoto(userpicPhotoId(), photo);
}
void ChannelData::setPhoto(PhotoId photoId, const MTPChatPhoto &photo) {
photo.match([&](const MTPDchatPhoto & data) {
updateUserpic(photoId, data.vdc_id().v, data.vphoto_small());
}, [&](const MTPDchatPhotoEmpty &) {
clearUserpic();
});
}
void ChannelData::setName(const QString &newName, const QString &newUsername) {
updateNameDelayed(newName.isEmpty() ? name : newName, QString(), newUsername);
}
void ChannelData::setInviteLink(const QString &newInviteLink) {
if (newInviteLink != _inviteLink) {
_inviteLink = newInviteLink;
Notify::peerUpdatedDelayed(this, UpdateFlag::InviteLinkChanged);
}
}
QString ChannelData::inviteLink() const {
return _inviteLink;
}
bool ChannelData::canHaveInviteLink() const {
return (adminRights() & AdminRight::f_invite_users)
|| amCreator();
}
void ChannelData::setLocation(const MTPChannelLocation &data) {
if (!mgInfo) {
return;
}
const auto was = mgInfo->getLocation();
const auto wasValue = was ? *was : ChannelLocation();
data.match([&](const MTPDchannelLocation &data) {
data.vgeo_point().match([&](const MTPDgeoPoint &point) {
mgInfo->setLocation({
qs(data.vaddress()),
Data::LocationPoint(point)
});
}, [&](const MTPDgeoPointEmpty &) {
mgInfo->setLocation(ChannelLocation());
});
}, [&](const MTPDchannelLocationEmpty &) {
mgInfo->setLocation(ChannelLocation());
});
const auto now = mgInfo->getLocation();
const auto nowValue = now ? *now : ChannelLocation();
if (was != now || (was && wasValue != nowValue)) {
Notify::peerUpdatedDelayed(
this,
Notify::PeerUpdate::Flag::ChannelLocation);
}
}
const ChannelLocation *ChannelData::getLocation() const {
return mgInfo ? mgInfo->getLocation() : nullptr;
}
void ChannelData::setLinkedChat(ChannelData *linked) {
if (_linkedChat != linked) {
_linkedChat = linked;
Notify::peerUpdatedDelayed(this, UpdateFlag::ChannelLinkedChat);
}
}
ChannelData *ChannelData::linkedChat() const {
return _linkedChat;
}
void ChannelData::setMembersCount(int newMembersCount) {
if (_membersCount != newMembersCount) {
if (isMegagroup() && !mgInfo->lastParticipants.empty()) {
mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsCountOutdated;
mgInfo->lastParticipantsCount = membersCount();
}
_membersCount = newMembersCount;
Notify::peerUpdatedDelayed(this, Notify::PeerUpdate::Flag::MembersChanged);
}
}
void ChannelData::setAdminsCount(int newAdminsCount) {
if (_adminsCount != newAdminsCount) {
_adminsCount = newAdminsCount;
Notify::peerUpdatedDelayed(this, Notify::PeerUpdate::Flag::AdminsChanged);
}
}
void ChannelData::setRestrictedCount(int newRestrictedCount) {
if (_restrictedCount != newRestrictedCount) {
_restrictedCount = newRestrictedCount;
Notify::peerUpdatedDelayed(this, Notify::PeerUpdate::Flag::BannedUsersChanged);
}
}
void ChannelData::setKickedCount(int newKickedCount) {
if (_kickedCount != newKickedCount) {
_kickedCount = newKickedCount;
Notify::peerUpdatedDelayed(this, Notify::PeerUpdate::Flag::BannedUsersChanged);
}
}
MTPChatBannedRights ChannelData::KickedRestrictedRights() {
using Flag = MTPDchatBannedRights::Flag;
const auto flags = Flag::f_view_messages
| Flag::f_send_messages
| Flag::f_send_media
| Flag::f_embed_links
| Flag::f_send_stickers
| Flag::f_send_gifs
| Flag::f_send_games
| Flag::f_send_inline;
return MTP_chatBannedRights(
MTP_flags(flags),
MTP_int(std::numeric_limits<int32>::max()));
}
void ChannelData::applyEditAdmin(
not_null<UserData*> user,
const MTPChatAdminRights &oldRights,
const MTPChatAdminRights &newRights,
const QString &rank) {
if (mgInfo) {
// If rights are empty - still add participant? TODO check
if (!base::contains(mgInfo->lastParticipants, user)) {
mgInfo->lastParticipants.push_front(user);
setMembersCount(membersCount() + 1);
if (user->isBot() && !mgInfo->bots.contains(user)) {
mgInfo->bots.insert(user);
if (mgInfo->botStatus != 0 && mgInfo->botStatus < 2) {
mgInfo->botStatus = 2;
}
}
}
// If rights are empty - still remove restrictions? TODO check
if (mgInfo->lastRestricted.contains(user)) {
mgInfo->lastRestricted.remove(user);
if (restrictedCount() > 0) {
setRestrictedCount(restrictedCount() - 1);
}
}
auto userId = peerToUser(user->id);
auto it = mgInfo->lastAdmins.find(user);
if (newRights.c_chatAdminRights().vflags().v != 0) {
auto lastAdmin = MegagroupInfo::Admin { newRights };
lastAdmin.canEdit = true;
if (it == mgInfo->lastAdmins.cend()) {
mgInfo->lastAdmins.emplace(user, lastAdmin);
setAdminsCount(adminsCount() + 1);
} else {
it->second = lastAdmin;
}
Data::ChannelAdminChanges(this).add(userId, rank);
} else {
if (it != mgInfo->lastAdmins.cend()) {
mgInfo->lastAdmins.erase(it);
if (adminsCount() > 0) {
setAdminsCount(adminsCount() - 1);
}
}
Data::ChannelAdminChanges(this).remove(userId);
}
}
if (oldRights.c_chatAdminRights().vflags().v && !newRights.c_chatAdminRights().vflags().v) {
// We removed an admin.
if (adminsCount() > 1) {
setAdminsCount(adminsCount() - 1);
}
if (!isMegagroup() && user->isBot() && membersCount() > 1) {
// Removing bot admin removes it from channel.
setMembersCount(membersCount() - 1);
}
} else if (!oldRights.c_chatAdminRights().vflags().v && newRights.c_chatAdminRights().vflags().v) {
// We added an admin.
setAdminsCount(adminsCount() + 1);
updateFullForced();
}
Notify::peerUpdatedDelayed(
this,
Notify::PeerUpdate::Flag::AdminsChanged);
}
void ChannelData::applyEditBanned(not_null<UserData*> user, const MTPChatBannedRights &oldRights, const MTPChatBannedRights &newRights) {
auto flags = Notify::PeerUpdate::Flag::BannedUsersChanged | Notify::PeerUpdate::Flag::None;
auto isKicked = (newRights.c_chatBannedRights().vflags().v & MTPDchatBannedRights::Flag::f_view_messages);
auto isRestricted = !isKicked && (newRights.c_chatBannedRights().vflags().v != 0);
if (mgInfo) {
// If rights are empty - still remove admin? TODO check
if (mgInfo->lastAdmins.contains(user)) {
mgInfo->lastAdmins.remove(user);
if (adminsCount() > 1) {
setAdminsCount(adminsCount() - 1);
} else {
flags |= Notify::PeerUpdate::Flag::AdminsChanged;
}
}
auto it = mgInfo->lastRestricted.find(user);
if (isRestricted) {
if (it == mgInfo->lastRestricted.cend()) {
mgInfo->lastRestricted.emplace(user, MegagroupInfo::Restricted { newRights });
setRestrictedCount(restrictedCount() + 1);
} else {
it->second.rights = newRights;
}
} else {
if (it != mgInfo->lastRestricted.cend()) {
mgInfo->lastRestricted.erase(it);
if (restrictedCount() > 0) {
setRestrictedCount(restrictedCount() - 1);
}
}
if (isKicked) {
auto i = ranges::find(mgInfo->lastParticipants, user);
if (i != mgInfo->lastParticipants.end()) {
mgInfo->lastParticipants.erase(i);
}
if (membersCount() > 1) {
setMembersCount(membersCount() - 1);
} else {
mgInfo->lastParticipantsStatus |= MegagroupInfo::LastParticipantsCountOutdated;
mgInfo->lastParticipantsCount = 0;
}
setKickedCount(kickedCount() + 1);
if (mgInfo->bots.contains(user)) {
mgInfo->bots.remove(user);
if (mgInfo->bots.empty() && mgInfo->botStatus > 0) {
mgInfo->botStatus = -1;
}
}
flags |= Notify::PeerUpdate::Flag::MembersChanged;
owner().removeMegagroupParticipant(this, user);
}
}
Data::ChannelAdminChanges(this).remove(peerToUser(user->id));
} else {
if (isKicked) {
if (membersCount() > 1) {
setMembersCount(membersCount() - 1);
flags |= Notify::PeerUpdate::Flag::MembersChanged;
}
setKickedCount(kickedCount() + 1);
}
}
Notify::peerUpdatedDelayed(this, flags);
}
void ChannelData::markForbidden() {
owner().processChat(MTP_channelForbidden(
MTP_flags(isMegagroup()
? MTPDchannelForbidden::Flag::f_megagroup
: MTPDchannelForbidden::Flag::f_broadcast),
MTP_int(bareId()),
MTP_long(access),
MTP_string(name),
MTPint()));
}
bool ChannelData::isGroupAdmin(not_null<UserData*> user) const {
if (auto info = mgInfo.get()) {
return info->admins.contains(peerToUser(user->id));
}
return false;
}
QString ChannelData::unavailableReason() const {
return _unavailableReason;
}
void ChannelData::setUnavailableReason(const QString &text) {
if (_unavailableReason != text) {
_unavailableReason = text;
Notify::peerUpdatedDelayed(
this,
Notify::PeerUpdate::Flag::UnavailableReasonChanged);
}
}
void ChannelData::setAvailableMinId(MsgId availableMinId) {
if (_availableMinId != availableMinId) {
_availableMinId = availableMinId;
if (pinnedMessageId() <= _availableMinId) {
clearPinnedMessage();
}
}
}
bool ChannelData::canBanMembers() const {
return amCreator()
|| (adminRights() & AdminRight::f_ban_users);
}
bool ChannelData::canEditMessages() const {
return amCreator()
|| (adminRights() & AdminRight::f_edit_messages);
}
bool ChannelData::canDeleteMessages() const {
return amCreator()
|| (adminRights() & AdminRight::f_delete_messages);
}
bool ChannelData::anyoneCanAddMembers() const {
return !(defaultRestrictions() & Restriction::f_invite_users);
}
bool ChannelData::hiddenPreHistory() const {
return (fullFlags() & MTPDchannelFull::Flag::f_hidden_prehistory);
}
bool ChannelData::canAddMembers() const {
return isMegagroup()
? !amRestricted(ChatRestriction::f_invite_users)
: ((adminRights() & AdminRight::f_invite_users) || amCreator());
}
bool ChannelData::canSendPolls() const {
return canWrite() && !amRestricted(ChatRestriction::f_send_polls);
}
bool ChannelData::canAddAdmins() const {
return amCreator()
|| (adminRights() & AdminRight::f_add_admins);
}
bool ChannelData::canPublish() const {
return amCreator()
|| (adminRights() & AdminRight::f_post_messages);
}
bool ChannelData::canWrite() const {
// Duplicated in Data::CanWriteValue().
return amIn()
&& (canPublish()
|| (!isBroadcast()
&& !amRestricted(Restriction::f_send_messages)));
}
bool ChannelData::canViewMembers() const {
return fullFlags()
& MTPDchannelFull::Flag::f_can_view_participants;
}
bool ChannelData::canViewAdmins() const {
return (isMegagroup() || hasAdminRights() || amCreator());
}
bool ChannelData::canViewBanned() const {
return (hasAdminRights() || amCreator());
}
bool ChannelData::canEditInformation() const {
return isMegagroup()
? !amRestricted(Restriction::f_change_info)
: ((adminRights() & AdminRight::f_change_info) || amCreator());
}
bool ChannelData::canEditPermissions() const {
return isMegagroup()
&& ((adminRights() & AdminRight::f_ban_users) || amCreator());
}
bool ChannelData::canEditSignatures() const {
return isChannel() && canEditInformation();
}
bool ChannelData::canEditPreHistoryHidden() const {
return isMegagroup()
&& ((adminRights() & AdminRight::f_ban_users) || amCreator())
&& (!isPublic() || canEditUsername());
}
bool ChannelData::canEditUsername() const {
return amCreator()
&& (fullFlags() & MTPDchannelFull::Flag::f_can_set_username);
}
bool ChannelData::canEditStickers() const {
return (fullFlags() & MTPDchannelFull::Flag::f_can_set_stickers);
}
bool ChannelData::canDelete() const {
constexpr auto kDeleteChannelMembersLimit = 1000;
return amCreator()
&& (membersCount() <= kDeleteChannelMembersLimit);
}
bool ChannelData::canEditLastAdmin(not_null<UserData*> user) const {
// Duplicated in ParticipantsBoxController::canEditAdmin :(
if (mgInfo) {
auto i = mgInfo->lastAdmins.find(user);
if (i != mgInfo->lastAdmins.cend()) {
return i->second.canEdit;
}
return (user != mgInfo->creator);
}
return false;
}
bool ChannelData::canEditAdmin(not_null<UserData*> user) const {
// Duplicated in ParticipantsBoxController::canEditAdmin :(
if (user->isSelf()) {
return false;
} else if (amCreator()) {
return true;
} else if (!canEditLastAdmin(user)) {
return false;
}
return adminRights() & AdminRight::f_add_admins;
}
bool ChannelData::canRestrictUser(not_null<UserData*> user) const {
// Duplicated in ParticipantsBoxController::canRestrictUser :(
if (user->isSelf()) {
return false;
} else if (amCreator()) {
return true;
} else if (!canEditLastAdmin(user)) {
return false;
}
return adminRights() & AdminRight::f_ban_users;
}
void ChannelData::setAdminRights(const MTPChatAdminRights &rights) {
if (rights.c_chatAdminRights().vflags().v == adminRights()) {
return;
}
_adminRights.set(rights.c_chatAdminRights().vflags().v);
if (isMegagroup()) {
const auto self = session().user();
if (hasAdminRights()) {
if (!amCreator()) {
auto me = MegagroupInfo::Admin { rights };
me.canEdit = false;
mgInfo->lastAdmins.emplace(self, me);
}
mgInfo->lastRestricted.remove(self);
} else {
mgInfo->lastAdmins.remove(self);
}
}
Notify::peerUpdatedDelayed(this, UpdateFlag::RightsChanged | UpdateFlag::AdminsChanged | UpdateFlag::BannedUsersChanged);
}
void ChannelData::setRestrictions(const MTPChatBannedRights &rights) {
if (rights.c_chatBannedRights().vflags().v == restrictions()
&& rights.c_chatBannedRights().vuntil_date().v == _restrictedUntil) {
return;
}
_restrictedUntil = rights.c_chatBannedRights().vuntil_date().v;
_restrictions.set(rights.c_chatBannedRights().vflags().v);
if (isMegagroup()) {
const auto self = session().user();
if (hasRestrictions()) {
if (!amCreator()) {
auto me = MegagroupInfo::Restricted { rights };
mgInfo->lastRestricted.emplace(self, me);
}
mgInfo->lastAdmins.remove(self);
Data::ChannelAdminChanges(this).remove(session().userId());
} else {
mgInfo->lastRestricted.remove(self);
}
}
Notify::peerUpdatedDelayed(this, UpdateFlag::RightsChanged | UpdateFlag::AdminsChanged | UpdateFlag::BannedUsersChanged);
}
void ChannelData::setDefaultRestrictions(const MTPChatBannedRights &rights) {
if (rights.c_chatBannedRights().vflags().v == defaultRestrictions()) {
return;
}
_defaultRestrictions.set(rights.c_chatBannedRights().vflags().v);
Notify::peerUpdatedDelayed(this, UpdateFlag::RightsChanged);
}
auto ChannelData::applyUpdateVersion(int version) -> UpdateStatus {
if (_version > version) {
return UpdateStatus::TooOld;
} else if (_version + 1 < version) {
session().api().requestPeer(this);
return UpdateStatus::Skipped;
}
setVersion(version);
return UpdateStatus::Good;
}
ChatData *ChannelData::getMigrateFromChat() const {
if (const auto info = mgInfo.get()) {
return info->getMigrateFromChat();
}
return nullptr;
}
void ChannelData::setMigrateFromChat(ChatData *chat) {
Expects(mgInfo != nullptr);
const auto info = mgInfo.get();
if (chat != info->getMigrateFromChat()) {
info->setMigrateFromChat(chat);
if (amIn()) {
Notify::peerUpdatedDelayed(this, UpdateFlag::MigrationChanged);
}
}
}
int ChannelData::slowmodeSeconds() const {
return _slowmodeSeconds;
}
void ChannelData::setSlowmodeSeconds(int seconds) {
if (_slowmodeSeconds == seconds) {
return;
}
_slowmodeSeconds = seconds;
Notify::peerUpdatedDelayed(this, UpdateFlag::ChannelSlowmode);
}
TimeId ChannelData::slowmodeLastMessage() const {
return (hasAdminRights() || amCreator()) ? 0 : _slowmodeLastMessage;
}
void ChannelData::growSlowmodeLastMessage(TimeId when) {
const auto now = base::unixtime::now();
accumulate_min(when, now);
if (_slowmodeLastMessage > now) {
_slowmodeLastMessage = when;
} else if (_slowmodeLastMessage >= when) {
return;
} else {
_slowmodeLastMessage = when;
}
Notify::peerUpdatedDelayed(this, UpdateFlag::ChannelSlowmode);
}
namespace Data {
void ApplyMigration(
not_null<ChatData*> chat,
not_null<ChannelData*> channel) {
Expects(channel->isMegagroup());
chat->setMigrateToChannel(channel);
channel->setMigrateFromChat(chat);
}
void ApplyChannelUpdate(
not_null<ChannelData*> channel,
const MTPDupdateChatDefaultBannedRights &update) {
if (channel->applyUpdateVersion(update.vversion().v)
!= ChannelData::UpdateStatus::Good) {
return;
}
channel->setDefaultRestrictions(update.vdefault_banned_rights());
}
void ApplyChannelUpdate(
not_null<ChannelData*> channel,
const MTPDchannelFull &update) {
channel->setAvailableMinId(update.vavailable_min_id().value_or_empty());
auto canViewAdmins = channel->canViewAdmins();
auto canViewMembers = channel->canViewMembers();
auto canEditStickers = channel->canEditStickers();
channel->setFullFlags(update.vflags().v);
channel->setUserpicPhoto(update.vchat_photo());
if (const auto migratedFrom = update.vmigrated_from_chat_id()) {
channel->addFlags(MTPDchannel::Flag::f_megagroup);
const auto chat = channel->owner().chat(migratedFrom->v);
Data::ApplyMigration(chat, channel);
}
for (const auto &item : update.vbot_info().v) {
auto &owner = channel->owner();
item.match([&](const MTPDbotInfo &info) {
if (const auto user = owner.userLoaded(info.vuser_id().v)) {
user->setBotInfo(item);
channel->session().api().fullPeerUpdated().notify(user);
}
});
}
channel->setAbout(qs(update.vabout()));
channel->setMembersCount(update.vparticipants_count().value_or_empty());
channel->setAdminsCount(update.vadmins_count().value_or_empty());
channel->setRestrictedCount(update.vbanned_count().value_or_empty());
channel->setKickedCount(update.vkicked_count().value_or_empty());
channel->setSlowmodeSeconds(update.vslowmode_seconds().value_or_empty());
if (const auto next = update.vslowmode_next_send_date()) {
channel->growSlowmodeLastMessage(
next->v - channel->slowmodeSeconds());
}
channel->setInviteLink(update.vexported_invite().match([&](
const MTPDchatInviteExported &data) {
return qs(data.vlink());
}, [&](const MTPDchatInviteEmpty &) {
return QString();
}));
if (const auto location = update.vlocation()) {
channel->setLocation(*location);
} else {
channel->setLocation(MTP_channelLocationEmpty());
}
if (const auto chat = update.vlinked_chat_id()) {
channel->setLinkedChat(channel->owner().channelLoaded(chat->v));
} else {
channel->setLinkedChat(nullptr);
}
if (const auto history = channel->owner().historyLoaded(channel)) {
if (const auto available = update.vavailable_min_id()) {
history->clearUpTill(available->v);
}
const auto folderId = update.vfolder_id().value_or_empty();
const auto folder = folderId
? channel->owner().folderLoaded(folderId)
: nullptr;
if (folder && history->folder() != folder) {
// If history folder is unknown or not synced, request both.
channel->session().api().requestDialogEntry(history);
channel->session().api().requestDialogEntry(folder);
} else if (!history->folderKnown()
|| channel->pts() != update.vpts().v) {
channel->session().api().requestDialogEntry(history);
} else {
history->applyDialogFields(
history->folder(),
update.vunread_count().v,
update.vread_inbox_max_id().v,
update.vread_outbox_max_id().v);
}
}
if (const auto pinned = update.vpinned_msg_id()) {
channel->setPinnedMessageId(pinned->v);
} else {
channel->clearPinnedMessage();
}
if (channel->isMegagroup()) {
const auto stickerSet = update.vstickerset();
const auto set = stickerSet ? &stickerSet->c_stickerSet() : nullptr;
const auto newSetId = (set ? set->vid().v : 0);
const auto oldSetId = (channel->mgInfo->stickerSet.type() == mtpc_inputStickerSetID)
? channel->mgInfo->stickerSet.c_inputStickerSetID().vid().v
: 0;
const auto stickersChanged = (canEditStickers != channel->canEditStickers())
|| (oldSetId != newSetId);
if (oldSetId != newSetId) {
channel->mgInfo->stickerSet = set
? MTP_inputStickerSetID(set->vid(), set->vaccess_hash())
: MTP_inputStickerSetEmpty();
}
if (stickersChanged) {
Notify::peerUpdatedDelayed(
channel,
Notify::PeerUpdate::Flag::ChannelStickersChanged);
}
}
channel->fullUpdated();
if (canViewAdmins != channel->canViewAdmins()
|| canViewMembers != channel->canViewMembers()) {
Notify::peerUpdatedDelayed(
channel,
Notify::PeerUpdate::Flag::RightsChanged);
}
channel->session().api().applyNotifySettings(
MTP_inputNotifyPeer(channel->input),
update.vnotify_settings());
}
void ApplyMegagroupAdmins(
not_null<ChannelData*> channel,
const MTPDchannels_channelParticipants &data) {
Expects(channel->isMegagroup());
channel->owner().processUsers(data.vusers());
const auto &list = data.vparticipants().v;
const auto i = ranges::find(
list,
mtpc_channelParticipantCreator,
&MTPChannelParticipant::type);
if (i != list.end()) {
const auto &data = i->c_channelParticipantCreator();
const auto userId = data.vuser_id().v;
channel->mgInfo->creator = channel->owner().userLoaded(userId);
channel->mgInfo->creatorRank = qs(data.vrank().value_or_empty());
} else {
channel->mgInfo->creator = nullptr;
channel->mgInfo->creatorRank = QString();
}
auto adding = base::flat_map<UserId, QString>();
auto admins = ranges::make_subrange(
list.begin(), list.end()
) | ranges::view::transform([](const MTPChannelParticipant &p) {
const auto userId = p.match([](const auto &data) {
return data.vuser_id().v;
});
const auto rank = p.match([](const MTPDchannelParticipantAdmin &data) {
return qs(data.vrank().value_or_empty());
}, [](const MTPDchannelParticipantCreator &data) {
return qs(data.vrank().value_or_empty());
}, [](const auto &data) {
return QString();
});
return std::make_pair(userId, rank);
});
for (const auto &[userId, rank] : admins) {
adding.emplace(userId, rank);
}
if (channel->mgInfo->creator) {
adding.emplace(
peerToUser(channel->mgInfo->creator->id),
channel->mgInfo->creatorRank);
}
auto removing = channel->mgInfo->admins;
if (removing.empty() && adding.empty()) {
// Add some admin-placeholder so we don't DDOS
// server with admins list requests.
LOG(("API Error: Got empty admins list from server."));
adding.emplace(0, QString());
}
Data::ChannelAdminChanges changes(channel);
for (const auto &[addingId, rank] : adding) {
if (!removing.remove(addingId)) {
changes.add(addingId, rank);
}
}
for (const auto &[removingId, rank] : removing) {
changes.remove(removingId);
}
}
} // namespace Data