tdesktop/Telegram/SourceFiles/api/api_invite_links.cpp

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/*
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 "api/api_invite_links.h"
#include "data/data_peer.h"
#include "data/data_chat.h"
#include "data/data_channel.h"
#include "data/data_session.h"
#include "data/data_changes.h"
#include "main/main_session.h"
#include "apiwrap.h"
namespace Api {
namespace {
constexpr auto kFirstPage = 10;
constexpr auto kPerPage = 50;
constexpr auto kJoinedFirstPage = 10;
void BringPermanentToFront(PeerInviteLinks &links) {
auto &list = links.links;
const auto i = ranges::find_if(list, [](const InviteLink &link) {
return link.permanent && !link.revoked;
});
if (i != end(list) && i != begin(list)) {
ranges::rotate(begin(list), i, i + 1);
}
}
void RemovePermanent(PeerInviteLinks &links) {
auto &list = links.links;
list.erase(ranges::remove_if(list, [](const InviteLink &link) {
return link.permanent && !link.revoked;
}), end(list));
}
} // namespace
InviteLinks::InviteLinks(not_null<ApiWrap*> api) : _api(api) {
}
void InviteLinks::create(
not_null<PeerData*> peer,
Fn<void(Link)> done,
TimeId expireDate,
int usageLimit) {
performCreate(peer, std::move(done), false, expireDate, usageLimit);
}
void InviteLinks::performCreate(
not_null<PeerData*> peer,
Fn<void(Link)> done,
bool revokeLegacyPermanent,
TimeId expireDate,
int usageLimit) {
if (const auto i = _createCallbacks.find(peer)
; i != end(_createCallbacks)) {
if (done) {
i->second.push_back(std::move(done));
}
return;
}
auto &callbacks = _createCallbacks[peer];
if (done) {
callbacks.push_back(std::move(done));
}
using Flag = MTPmessages_ExportChatInvite::Flag;
_api->request(MTPmessages_ExportChatInvite(
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MTP_flags((revokeLegacyPermanent
? Flag::f_legacy_revoke_permanent
: Flag(0))
| (expireDate ? Flag::f_expire_date : Flag(0))
| (usageLimit ? Flag::f_usage_limit : Flag(0))),
peer->input,
MTP_int(expireDate),
MTP_int(usageLimit)
)).done([=](const MTPExportedChatInvite &result) {
const auto callbacks = _createCallbacks.take(peer);
const auto link = prepend(peer, result);
if (callbacks) {
for (const auto &callback : *callbacks) {
callback(link);
}
}
}).fail([=](const RPCError &error) {
_createCallbacks.erase(peer);
}).send();
}
auto InviteLinks::lookupPermanent(not_null<PeerData*> peer) -> Link* {
auto i = _firstSlices.find(peer);
return (i != end(_firstSlices)) ? lookupPermanent(i->second) : nullptr;
}
auto InviteLinks::lookupPermanent(Links &links) -> Link* {
const auto first = links.links.begin();
return (first != end(links.links) && first->permanent && !first->revoked)
? &*first
: nullptr;
}
auto InviteLinks::lookupPermanent(const Links &links) const -> const Link* {
const auto first = links.links.begin();
return (first != end(links.links) && first->permanent && !first->revoked)
? &*first
: nullptr;
}
auto InviteLinks::prepend(
not_null<PeerData*> peer,
const MTPExportedChatInvite &invite) -> Link {
const auto link = parse(peer, invite);
auto i = _firstSlices.find(peer);
if (i == end(_firstSlices)) {
i = _firstSlices.emplace(peer).first;
}
auto &links = i->second;
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const auto permanent = lookupPermanent(links);
if (link.permanent) {
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if (permanent) {
permanent->revoked = true;
}
editPermanentLink(peer, link.link);
}
++links.count;
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if (permanent && !link.permanent) {
links.links.insert(begin(links.links) + 1, link);
} else {
links.links.insert(begin(links.links), link);
}
notify(peer);
return link;
}
void InviteLinks::edit(
not_null<PeerData*> peer,
const QString &link,
TimeId expireDate,
int usageLimit,
Fn<void(Link)> done) {
performEdit(peer, link, std::move(done), false, expireDate, usageLimit);
}
void InviteLinks::performEdit(
not_null<PeerData*> peer,
const QString &link,
Fn<void(Link)> done,
bool revoke,
TimeId expireDate,
int usageLimit) {
const auto key = LinkKey{ peer, link };
if (const auto i = _editCallbacks.find(key); i != end(_editCallbacks)) {
if (done) {
i->second.push_back(std::move(done));
}
return;
}
if (const auto permanent = revoke ? lookupPermanent(peer) : nullptr) {
if (permanent->link == link) {
// In case of revoking a permanent link
// we should just create a new one instead.
performCreate(peer, std::move(done), true);
return;
}
}
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auto &callbacks = _editCallbacks[key];
if (done) {
callbacks.push_back(std::move(done));
}
using Flag = MTPmessages_EditExportedChatInvite::Flag;
const auto requestId = _api->request(MTPmessages_EditExportedChatInvite(
MTP_flags((revoke ? Flag::f_revoked : Flag(0))
| ((!revoke && expireDate) ? Flag::f_expire_date : Flag(0))
| ((!revoke && usageLimit) ? Flag::f_usage_limit : Flag(0))),
peer->input,
MTP_string(link),
MTP_int(expireDate),
MTP_int(usageLimit)
)).done([=](const MTPmessages_ExportedChatInvite &result) {
const auto callbacks = _editCallbacks.take(key);
const auto peer = key.peer;
result.match([&](const MTPDmessages_exportedChatInvite &data) {
_api->session().data().processUsers(data.vusers());
const auto link = parse(peer, data.vinvite());
auto i = _firstSlices.find(peer);
if (i != end(_firstSlices)) {
const auto j = ranges::find(
i->second.links,
key.link,
&Link::link);
if (j != end(i->second.links)) {
*j = link;
notify(peer);
}
}
for (const auto &callback : *callbacks) {
callback(link);
}
});
}).fail([=](const RPCError &error) {
_editCallbacks.erase(key);
}).send();
}
void InviteLinks::revoke(
not_null<PeerData*> peer,
const QString &link,
Fn<void(Link)> done) {
performEdit(peer, link, std::move(done), true);
}
void InviteLinks::revokePermanent(
not_null<PeerData*> peer,
Fn<void(Link)> done) {
performCreate(peer, std::move(done), true);
}
void InviteLinks::requestLinks(not_null<PeerData*> peer) {
if (_firstSliceRequests.contains(peer)) {
return;
}
const auto requestId = _api->request(MTPmessages_GetExportedChatInvites(
MTP_flags(0),
peer->input,
MTPInputUser(), // admin_id
MTPstring(), // offset_link
MTP_int(kFirstPage)
)).done([=](const MTPmessages_ExportedChatInvites &result) {
_firstSliceRequests.remove(peer);
auto slice = parseSlice(peer, result);
auto i = _firstSlices.find(peer);
const auto permanent = (i != end(_firstSlices))
? lookupPermanent(i->second)
: nullptr;
if (!permanent) {
BringPermanentToFront(slice);
const auto j = _firstSlices.emplace_or_assign(
peer,
std::move(slice)).first;
if (const auto permanent = lookupPermanent(j->second)) {
editPermanentLink(peer, permanent->link);
}
} else {
RemovePermanent(slice);
auto &existing = i->second.links;
existing.erase(begin(existing) + 1, end(existing));
existing.insert(
end(existing),
begin(slice.links),
end(slice.links));
i->second.count = std::max(slice.count, int(existing.size()));
}
notify(peer);
}).fail([=](const RPCError &error) {
_firstSliceRequests.remove(peer);
}).send();
_firstSliceRequests.emplace(peer, requestId);
}
JoinedByLinkSlice InviteLinks::lookupJoinedFirstSlice(LinkKey key) const {
const auto i = _firstJoined.find(key);
return (i != end(_firstJoined)) ? i->second : JoinedByLinkSlice();
}
rpl::producer<JoinedByLinkSlice> InviteLinks::joinedFirstSliceValue(
not_null<PeerData*> peer,
const QString &link,
int fullCount) {
const auto key = LinkKey{ peer, link };
auto current = lookupJoinedFirstSlice(key);
if (current.count == fullCount
&& (!fullCount || !current.users.empty())) {
return rpl::single(current);
}
current.count = fullCount;
const auto remove = int(current.users.size()) - current.count;
if (remove > 0) {
current.users.erase(end(current.users) - remove, end(current.users));
}
requestJoinedFirstSlice(key);
using namespace rpl::mappers;
return rpl::single(
current
) | rpl::then(_joinedFirstSliceLoaded.events(
) | rpl::filter(
_1 == key
) | rpl::map([=] {
return lookupJoinedFirstSlice(key);
}));
}
void InviteLinks::requestJoinedFirstSlice(LinkKey key) {
if (_firstJoinedRequests.contains(key)) {
return;
}
const auto requestId = _api->request(MTPmessages_GetChatInviteImporters(
key.peer->input,
MTP_string(key.link),
MTP_int(0), // offset_date
MTP_inputUserEmpty(), // offset_user
MTP_int(kJoinedFirstPage)
)).done([=](const MTPmessages_ChatInviteImporters &result) {
_firstJoinedRequests.remove(key);
_firstJoined[key] = parseSlice(key.peer, result);
_joinedFirstSliceLoaded.fire_copy(key);
}).fail([=](const RPCError &error) {
_firstJoinedRequests.remove(key);
}).send();
_firstJoinedRequests.emplace(key, requestId);
}
void InviteLinks::setPermanent(
not_null<PeerData*> peer,
const MTPExportedChatInvite &invite) {
auto link = parse(peer, invite);
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if (!link.permanent) {
LOG(("API Error: "
"InviteLinks::setPermanent called with non-permanent link."));
return;
}
auto i = _firstSlices.find(peer);
if (i == end(_firstSlices)) {
i = _firstSlices.emplace(peer).first;
}
auto &links = i->second;
if (const auto permanent = lookupPermanent(links)) {
if (permanent->link == link.link) {
if (permanent->usage != link.usage) {
permanent->usage = link.usage;
notify(peer);
}
return;
}
permanent->revoked = true;
}
links.links.insert(begin(links.links), link);
editPermanentLink(peer, link.link);
notify(peer);
}
void InviteLinks::clearPermanent(not_null<PeerData*> peer) {
if (const auto permanent = lookupPermanent(peer)) {
permanent->revoked = true;
editPermanentLink(peer, QString());
notify(peer);
}
}
void InviteLinks::notify(not_null<PeerData*> peer) {
peer->session().changes().peerUpdated(
peer,
Data::PeerUpdate::Flag::InviteLinks);
}
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auto InviteLinks::links(not_null<PeerData*> peer) const -> const Links & {
static const auto kEmpty = Links();
const auto i = _firstSlices.find(peer);
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return (i != end(_firstSlices)) ? i->second : kEmpty;
}
auto InviteLinks::parseSlice(
not_null<PeerData*> peer,
const MTPmessages_ExportedChatInvites &slice) const -> Links {
auto i = _firstSlices.find(peer);
const auto permanent = (i != end(_firstSlices))
? lookupPermanent(i->second)
: nullptr;
auto result = Links();
slice.match([&](const MTPDmessages_exportedChatInvites &data) {
peer->session().data().processUsers(data.vusers());
result.count = data.vcount().v;
for (const auto &invite : data.vinvites().v) {
const auto link = parse(peer, invite);
if (!permanent || link.link != permanent->link) {
result.links.push_back(link);
}
}
});
return result;
}
JoinedByLinkSlice InviteLinks::parseSlice(
not_null<PeerData*> peer,
const MTPmessages_ChatInviteImporters &slice) const {
auto result = JoinedByLinkSlice();
slice.match([&](const MTPDmessages_chatInviteImporters &data) {
auto &owner = peer->session().data();
owner.processUsers(data.vusers());
result.count = data.vcount().v;
result.users.reserve(data.vimporters().v.size());
for (const auto importer : data.vimporters().v) {
importer.match([&](const MTPDchatInviteImporter &data) {
result.users.push_back({
.user = owner.user(data.vuser_id().v),
.date = data.vdate().v,
});
});
}
});
return result;
}
auto InviteLinks::parse(
not_null<PeerData*> peer,
const MTPExportedChatInvite &invite) const -> Link {
return invite.match([&](const MTPDchatInviteExported &data) {
return Link{
.link = qs(data.vlink()),
.admin = peer->session().data().user(data.vadmin_id().v),
.date = data.vdate().v,
.startDate = data.vstart_date().value_or_empty(),
.expireDate = data.vexpire_date().value_or_empty(),
.usageLimit = data.vusage_limit().value_or_empty(),
.usage = data.vusage().value_or_empty(),
.permanent = data.is_permanent(),
.expired = data.is_expired(),
.revoked = data.is_revoked(),
};
});
}
void InviteLinks::requestMoreLinks(
not_null<PeerData*> peer,
const QString &last,
bool revoked,
Fn<void(Links)> done) {
using Flag = MTPmessages_GetExportedChatInvites::Flag;
_api->request(MTPmessages_GetExportedChatInvites(
MTP_flags(Flag::f_offset_link
| (revoked ? Flag::f_revoked : Flag(0))),
peer->input,
MTPInputUser(), // admin_id,
MTP_string(last),
MTP_int(kPerPage)
)).done([=](const MTPmessages_ExportedChatInvites &result) {
auto slice = parseSlice(peer, result);
RemovePermanent(slice);
done(std::move(slice));
}).fail([=](const RPCError &error) {
done(Links());
}).send();
}
void InviteLinks::editPermanentLink(
not_null<PeerData*> peer,
const QString &link) {
if (const auto chat = peer->asChat()) {
chat->setInviteLink(link);
} else if (const auto channel = peer->asChannel()) {
channel->setInviteLink(link);
} else {
Unexpected("Peer in InviteLinks::editMainLink.");
}
}
} // namespace Api