tdesktop/Telegram/SourceFiles/data/data_forum.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 "data/data_forum.h"
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#include "data/data_channel.h"
#include "data/data_session.h"
#include "data/data_forum_topic.h"
#include "history/history.h"
#include "history/history_item.h"
#include "main/main_session.h"
#include "base/random.h"
#include "apiwrap.h"
#include "lang/lang_keys.h"
#include "ui/layers/generic_box.h"
#include "ui/widgets/input_fields.h"
#include "window/window_session_controller.h"
#include "styles/style_boxes.h"
namespace Data {
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namespace {
constexpr auto kTopicsFirstLoad = 20;
constexpr auto kTopicsPerPage = 500;
} // namespace
Forum::Forum(not_null<History*> history)
: _history(history)
, _topicsList(&_history->session(), FilterId(0), rpl::single(1)) {
Expects(_history->peer->isChannel());
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}
Forum::~Forum() {
if (_requestId) {
_history->session().api().request(_requestId).cancel();
}
}
not_null<History*> Forum::history() const {
return _history;
}
not_null<ChannelData*> Forum::channel() const {
return _history->peer->asChannel();
}
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not_null<Dialogs::MainList*> Forum::topicsList() {
return &_topicsList;
}
void Forum::requestTopics() {
if (_allLoaded || _requestId) {
return;
}
const auto firstLoad = !_offsetDate;
const auto loadCount = firstLoad ? kTopicsFirstLoad : kTopicsPerPage;
const auto api = &_history->session().api();
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_requestId = api->request(MTPchannels_GetForumTopics(
MTP_flags(0),
channel()->inputChannel,
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MTPstring(), // q
MTP_int(_offsetDate),
MTP_int(_offsetId),
MTP_int(_offsetTopicId),
MTP_int(loadCount)
)).done([=](const MTPmessages_ForumTopics &result) {
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applyReceivedTopics(result, true);
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_requestId = 0;
_chatsListChanges.fire({});
if (_allLoaded) {
_chatsListLoadedEvents.fire({});
}
}).fail([=](const MTP::Error &error) {
_allLoaded = true;
_requestId = 0;
}).send();
}
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void Forum::applyReceivedTopics(const MTPmessages_ForumTopics &result) {
applyReceivedTopics(result, false);
}
void Forum::applyReceivedTopics(
const MTPmessages_ForumTopics &topics,
bool updateOffset) {
const auto &data = topics.data();
const auto owner = &channel()->owner();
owner->processUsers(data.vusers());
owner->processChats(data.vchats());
owner->processMessages(data.vmessages(), NewMessageType::Existing);
channel()->ptsReceived(data.vpts().v);
const auto &list = data.vtopics().v;
for (const auto &topic : list) {
const auto rootId = MsgId(topic.data().vid().v);
const auto i = _topics.find(rootId);
const auto creating = (i == end(_topics));
const auto raw = creating
? _topics.emplace(
rootId,
std::make_unique<ForumTopic>(_history, rootId)
).first->second.get()
: i->second.get();
raw->applyTopic(topic);
if (updateOffset) {
if (const auto last = raw->lastServerMessage()) {
_offsetDate = last->date();
_offsetId = last->id;
}
_offsetTopicId = rootId;
}
}
if (updateOffset
&& (list.isEmpty() || list.size() == data.vcount().v)) {
_allLoaded = true;
}
}
void Forum::applyTopicAdded(
MsgId rootId,
const QString &title,
DocumentId iconId) {
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if (const auto i = _topics.find(rootId); i != end(_topics)) {
i->second->applyTitle(title);
i->second->applyIconId(iconId);
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} else {
const auto raw = _topics.emplace(
rootId,
std::make_unique<ForumTopic>(_history, rootId)
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).first->second.get();
raw->applyTitle(title);
raw->applyIconId(iconId);
if (!creating(rootId)) {
raw->addToChatList(FilterId(), topicsList());
_chatsListChanges.fire({});
}
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}
}
void Forum::applyTopicRemoved(MsgId rootId) {
//if (const auto i = _topics.find(rootId)) {
// _topics.erase(i);
//}
}
MsgId Forum::reserveCreatingId(
const QString &title,
DocumentId iconId) {
const auto result = _history->owner().nextLocalMessageId();
_creatingRootIds.emplace(result);
applyTopicAdded(result, title, iconId);
return result;
}
void Forum::discardCreatingId(MsgId rootId) {
Expects(creating(rootId));
const auto i = _topics.find(rootId);
if (i != end(_topics)) {
Assert(!i->second->inChatList());
_topics.erase(i);
}
_creatingRootIds.remove(rootId);
}
bool Forum::creating(MsgId rootId) const {
return _creatingRootIds.contains(rootId);
}
ForumTopic *Forum::topicFor(not_null<HistoryItem*> item) {
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const auto maybe = topicFor(item->replyToTop());
return maybe ? maybe : topicFor(item->topicRootId());
}
ForumTopic *Forum::topicFor(MsgId rootId) {
if (rootId != ForumTopic::kGeneralId) {
if (const auto i = _topics.find(rootId); i != end(_topics)) {
return i->second.get();
}
} else {
// #TODO forum lang
applyTopicAdded(rootId, "General! Created.", DocumentId(0));
return _topics.find(rootId)->second.get();
}
return nullptr;
}
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rpl::producer<> Forum::chatsListChanges() const {
return _chatsListChanges.events();
}
rpl::producer<> Forum::chatsListLoadedEvents() const {
return _chatsListLoadedEvents.events();
}
} // namespace Data