383 lines
10 KiB
C++
383 lines
10 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "api/api_who_read.h"
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#include "history/history_item.h"
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#include "history/history.h"
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#include "data/data_peer.h"
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#include "data/data_chat.h"
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#include "data/data_channel.h"
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#include "data/data_document.h"
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#include "data/data_user.h"
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#include "data/data_changes.h"
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#include "data/data_session.h"
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#include "data/data_media_types.h"
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#include "main/main_app_config.h"
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#include "main/main_session.h"
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#include "main/main_account.h"
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#include "base/unixtime.h"
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#include "base/weak_ptr.h"
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#include "ui/controls/who_read_context_action.h"
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#include "apiwrap.h"
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#include "styles/style_chat.h"
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namespace Api {
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namespace {
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struct Cached {
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explicit Cached(PeerId unknownFlag)
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: list(std::vector<PeerId>{ unknownFlag }) {
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}
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rpl::variable<std::vector<PeerId>> list;
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mtpRequestId requestId = 0;
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};
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struct Context {
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base::flat_map<not_null<HistoryItem*>, Cached> cached;
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base::flat_map<not_null<Main::Session*>, rpl::lifetime> subscriptions;
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[[nodiscard]] Cached &cache(not_null<HistoryItem*> item) {
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const auto i = cached.find(item);
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if (i != end(cached)) {
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return i->second;
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}
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return cached.emplace(
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item,
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Cached(item->history()->session().userPeerId())
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).first->second;
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}
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};
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struct Userpic {
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not_null<PeerData*> peer;
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mutable std::shared_ptr<Data::CloudImageView> view;
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mutable InMemoryKey uniqueKey;
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};
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struct State {
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std::vector<Userpic> userpics;
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Ui::WhoReadContent current;
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base::has_weak_ptr guard;
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bool someUserpicsNotLoaded = false;
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bool scheduled = false;
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};
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[[nodiscard]] auto Contexts()
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-> base::flat_map<not_null<QWidget*>, std::unique_ptr<Context>> & {
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static auto result = base::flat_map<
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not_null<QWidget*>,
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std::unique_ptr<Context>>();
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return result;
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}
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[[nodiscard]] not_null<Context*> ContextAt(not_null<QWidget*> key) {
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auto &contexts = Contexts();
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const auto i = contexts.find(key);
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if (i != end(contexts)) {
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return i->second.get();
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}
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const auto result = contexts.emplace(
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key,
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std::make_unique<Context>()).first->second.get();
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QObject::connect(key.get(), &QObject::destroyed, [=] {
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auto &contexts = Contexts();
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const auto i = contexts.find(key);
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for (auto &[item, entry] : i->second->cached) {
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if (const auto requestId = entry.requestId) {
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item->history()->session().api().request(requestId).cancel();
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}
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}
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contexts.erase(i);
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});
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return result;
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}
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[[nodiscard]] QImage GenerateUserpic(Userpic &userpic, int size) {
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size *= style::DevicePixelRatio();
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auto result = userpic.peer->generateUserpicImage(userpic.view, size);
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result.setDevicePixelRatio(style::DevicePixelRatio());
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return result;
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}
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[[nodiscard]] bool ListUnknown(
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const std::vector<PeerId> &list,
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not_null<HistoryItem*> item) {
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return (list.size() == 1)
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&& (list.front() == item->history()->session().userPeerId());
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}
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[[nodiscard]] Ui::WhoReadType DetectType(not_null<HistoryItem*> item) {
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if (const auto media = item->media()) {
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if (!media->webpage()) {
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if (const auto document = media->document()) {
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if (document->isVoiceMessage()) {
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return Ui::WhoReadType::Listened;
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} else if (document->isVideoMessage()) {
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return Ui::WhoReadType::Watched;
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}
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}
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}
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}
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return Ui::WhoReadType::Seen;
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}
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[[nodiscard]] rpl::producer<std::vector<PeerId>> WhoReadIds(
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not_null<HistoryItem*> item,
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not_null<QWidget*> context) {
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auto weak = QPointer<QWidget>(context.get());
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const auto session = &item->history()->session();
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return [=](auto consumer) {
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if (!weak) {
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return rpl::lifetime();
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}
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const auto context = ContextAt(weak.data());
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if (!context->subscriptions.contains(session)) {
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session->changes().messageUpdates(
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Data::MessageUpdate::Flag::Destroyed
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) | rpl::start_with_next([=](const Data::MessageUpdate &update) {
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const auto i = context->cached.find(update.item);
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if (i == end(context->cached)) {
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return;
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}
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session->api().request(i->second.requestId).cancel();
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context->cached.erase(i);
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}, context->subscriptions[session]);
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}
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auto &entry = context->cache(item);
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if (!entry.requestId) {
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entry.requestId = session->api().request(
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MTPmessages_GetMessageReadParticipants(
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item->history()->peer->input,
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MTP_int(item->id)
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)
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).done([=](const MTPVector<MTPlong> &result) {
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auto &entry = context->cache(item);
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entry.requestId = 0;
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auto peers = std::vector<PeerId>();
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peers.reserve(std::max(result.v.size(), 1));
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for (const auto &id : result.v) {
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peers.push_back(UserId(id));
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}
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entry.list = std::move(peers);
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}).fail([=](const MTP::Error &error) {
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auto &entry = context->cache(item);
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entry.requestId = 0;
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if (ListUnknown(entry.list.current(), item)) {
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entry.list = std::vector<PeerId>();
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}
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}).send();
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}
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return entry.list.value().start_existing(consumer);
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};
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}
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bool UpdateUserpics(
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not_null<State*> state,
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not_null<HistoryItem*> item,
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const std::vector<PeerId> &ids) {
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auto &owner = item->history()->owner();
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const auto peers = ranges::views::all(
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ids
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) | ranges::views::transform([&](PeerId id) {
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return owner.peerLoaded(id);
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}) | ranges::views::filter([](PeerData *peer) {
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return peer != nullptr;
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}) | ranges::views::transform([](PeerData *peer) {
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return not_null(peer);
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}) | ranges::to_vector;
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const auto same = ranges::equal(
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state->userpics,
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peers,
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ranges::less(),
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&Userpic::peer);
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if (same) {
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return false;
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}
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auto &was = state->userpics;
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auto now = std::vector<Userpic>();
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for (const auto peer : peers) {
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if (ranges::contains(now, peer, &Userpic::peer)) {
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continue;
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}
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const auto i = ranges::find(was, peer, &Userpic::peer);
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if (i != end(was)) {
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now.push_back(std::move(*i));
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continue;
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}
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now.push_back(Userpic{
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.peer = peer,
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});
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auto &userpic = now.back();
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userpic.uniqueKey = peer->userpicUniqueKey(userpic.view);
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peer->loadUserpic();
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}
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was = std::move(now);
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return true;
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}
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void RegenerateUserpics(not_null<State*> state, int small, int large) {
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Expects(state->userpics.size() == state->current.participants.size());
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state->someUserpicsNotLoaded = false;
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const auto count = int(state->userpics.size());
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for (auto i = 0; i != count; ++i) {
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auto &userpic = state->userpics[i];
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auto &participant = state->current.participants[i];
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const auto peer = userpic.peer;
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const auto key = peer->userpicUniqueKey(userpic.view);
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if (peer->hasUserpic() && peer->useEmptyUserpic(userpic.view)) {
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state->someUserpicsNotLoaded = true;
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}
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if (userpic.uniqueKey == key) {
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continue;
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}
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participant.userpicKey = userpic.uniqueKey = key;
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participant.userpicLarge = GenerateUserpic(userpic, large);
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if (i < Ui::WhoReadParticipant::kMaxSmallUserpics) {
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participant.userpicSmall = GenerateUserpic(userpic, small);
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}
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}
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}
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void RegenerateParticipants(not_null<State*> state, int small, int large) {
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auto old = base::take(state->current.participants);
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auto &now = state->current.participants;
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now.reserve(state->userpics.size());
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for (auto &userpic : state->userpics) {
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const auto peer = userpic.peer;
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const auto id = peer->id.value;
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const auto was = ranges::find(old, id, &Ui::WhoReadParticipant::id);
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if (was != end(old)) {
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was->name = peer->name;
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now.push_back(std::move(*was));
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continue;
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}
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now.push_back({
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.name = peer->name,
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.userpicLarge = GenerateUserpic(userpic, large),
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.userpicKey = userpic.uniqueKey,
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.id = id,
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});
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if (now.size() <= Ui::WhoReadParticipant::kMaxSmallUserpics) {
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now.back().userpicSmall = GenerateUserpic(userpic, small);
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}
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}
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RegenerateUserpics(state, small, large);
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}
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} // namespace
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bool WhoReadExists(not_null<HistoryItem*> item) {
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if (!item->out()) {
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return false;
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}
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const auto type = DetectType(item);
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const auto unseen = (type == Ui::WhoReadType::Seen)
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? item->unread()
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: item->isUnreadMedia();
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if (unseen) {
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return false;
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}
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const auto history = item->history();
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const auto peer = history->peer;
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const auto chat = peer->asChat();
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const auto megagroup = peer->asMegagroup();
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if (!chat && !megagroup) {
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return false;
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} else if (peer->migrateTo()) {
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// They're all always marked as read.
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// We don't know if there really are any readers.
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return false;
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}
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const auto &appConfig = peer->session().account().appConfig();
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const auto expirePeriod = TimeId(appConfig.get<double>(
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"chat_read_mark_expire_period",
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7 * 86400.));
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if (item->date() + expirePeriod <= base::unixtime::now()) {
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return false;
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}
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const auto maxCount = int(appConfig.get<double>(
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"chat_read_mark_size_threshold",
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50));
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const auto count = megagroup ? megagroup->membersCount() : chat->count;
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if (count <= 0 || count > maxCount) {
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return false;
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}
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return true;
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}
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rpl::producer<Ui::WhoReadContent> WhoRead(
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not_null<HistoryItem*> item,
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not_null<QWidget*> context,
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const style::WhoRead &st) {
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const auto small = st.userpics.size;
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const auto large = st.photoSize;
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return [=](auto consumer) {
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auto lifetime = rpl::lifetime();
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const auto state = lifetime.make_state<State>();
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state->current.type = [&] {
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if (const auto media = item->media()) {
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if (!media->webpage()) {
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if (const auto document = media->document()) {
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if (document->isVoiceMessage()) {
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return Ui::WhoReadType::Listened;
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} else if (document->isVideoMessage()) {
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return Ui::WhoReadType::Watched;
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}
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}
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}
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}
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return Ui::WhoReadType::Seen;
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}();
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const auto pushNext = [=] {
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consumer.put_next_copy(state->current);
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};
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WhoReadIds(
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item,
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context
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) | rpl::start_with_next([=](const std::vector<PeerId> &peers) {
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if (ListUnknown(peers, item)) {
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state->userpics.clear();
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consumer.put_next(Ui::WhoReadContent{
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.type = state->current.type,
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.unknown = true,
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});
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return;
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} else if (UpdateUserpics(state, item, peers)) {
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RegenerateParticipants(state, small, large);
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pushNext();
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}
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}, lifetime);
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item->history()->session().downloaderTaskFinished(
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) | rpl::filter([=] {
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return state->someUserpicsNotLoaded && !state->scheduled;
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}) | rpl::start_with_next([=] {
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for (const auto &userpic : state->userpics) {
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if (userpic.peer->userpicUniqueKey(userpic.view)
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!= userpic.uniqueKey) {
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state->scheduled = true;
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crl::on_main(&state->guard, [=] {
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state->scheduled = false;
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RegenerateUserpics(state, small, large);
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pushNext();
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});
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return;
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}
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}
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}, lifetime);
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return lifetime;
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};
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}
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} // namespace Api
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