140 lines
3.3 KiB
C++
140 lines
3.3 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 "data/data_groups.h"
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#include "history/history_item.h"
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#include "data/data_media_types.h"
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#include "data/data_session.h"
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namespace Data {
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namespace {
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constexpr auto kMaxItemsInGroup = 10;
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} // namespace
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Groups::Groups(not_null<Session*> data) : _data(data) {
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}
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bool Groups::isGrouped(not_null<HistoryItem*> item) const {
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if (!item->groupId()) {
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return false;
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}
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const auto media = item->media();
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return media && media->canBeGrouped();
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}
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void Groups::registerMessage(not_null<HistoryItem*> item) {
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if (!isGrouped(item)) {
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return;
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}
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const auto i = _groups.emplace(item->groupId(), Group()).first;
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auto &items = i->second.items;
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if (items.size() < kMaxItemsInGroup) {
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items.insert(findPositionForItem(items, item), item);
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if (items.size() > 1) {
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refreshViews(items);
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}
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}
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}
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void Groups::unregisterMessage(not_null<const HistoryItem*> item) {
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const auto groupId = item->groupId();
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if (!groupId) {
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return;
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}
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const auto i = _groups.find(groupId);
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if (i != end(_groups)) {
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auto &items = i->second.items;
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const auto removed = ranges::remove(items, item);
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const auto last = end(items);
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if (removed != last) {
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items.erase(removed, last);
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if (!items.empty()) {
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refreshViews(items);
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} else {
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_groups.erase(i);
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}
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}
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}
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}
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void Groups::refreshMessage(not_null<HistoryItem*> item) {
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if (!isGrouped(item)) {
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unregisterMessage(item);
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return;
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}
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if (!IsServerMsgId(item->id)) {
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return;
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}
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const auto groupId = item->groupId();
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const auto i = _groups.find(groupId);
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if (i == end(_groups)) {
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registerMessage(item);
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return;
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}
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auto &items = i->second.items;
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const auto position = findPositionForItem(items, item);
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auto current = ranges::find(items, item);
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if (current == end(items)) {
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items.insert(position, item);
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} else if (position == current + 1) {
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return;
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} else if (position > current + 1) {
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for (++current; current != position; ++current) {
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std::swap(*(current - 1), *current);
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}
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} else if (position < current) {
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for (; current != position; --current) {
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std::swap(*(current - 1), *current);
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}
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} else {
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Unexpected("Position of item in Groups::refreshMessage().");
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}
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refreshViews(items);
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}
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HistoryItemsList::const_iterator Groups::findPositionForItem(
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const HistoryItemsList &group,
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not_null<HistoryItem*> item) {
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const auto itemId = item->id;
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const auto last = end(group);
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if (!IsServerMsgId(itemId)) {
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return last;
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}
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for (auto result = begin(group); result != last; ++result) {
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const auto alreadyId = (*result)->id;
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if (IsServerMsgId(alreadyId) && alreadyId > itemId) {
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return result;
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}
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}
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return last;
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}
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const Group *Groups::find(not_null<HistoryItem*> item) const {
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const auto groupId = item->groupId();
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if (!groupId) {
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return nullptr;
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}
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const auto i = _groups.find(groupId);
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if (i != _groups.end()) {
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const auto &result = i->second;
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if (result.items.size() > 1) {
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return &result;
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}
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}
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return nullptr;
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}
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void Groups::refreshViews(const HistoryItemsList &items) {
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for (const auto item : items) {
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_data->requestItemViewRefresh(item);
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}
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}
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} // namespace Data
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