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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_groups.h"
#include "history/history.h"
#include "history/history_item.h"
#include "dialogs/ui/dialogs_message_view.h"
#include "data/data_media_types.h"
#include "data/data_session.h"
#include "data/data_forum.h"
#include "data/data_forum_topic.h"
namespace Data {
namespace {
constexpr auto kMaxItemsInGroup = 10;
} // namespace
Groups::Groups(not_null<Session*> data) : _data(data) {
}
bool Groups::isGrouped(not_null<const HistoryItem*> item) const {
if (!item->groupId()) {
return false;
}
const auto media = item->media();
return media && media->canBeGrouped();
}
bool Groups::isGroupOfOne(not_null<const HistoryItem*> item) const {
if (const auto groupId = item->groupId()) {
const auto i = _groups.find(groupId);
return (i != _groups.end()) && (i->second.items.size() == 1);
}
return false;
}
void Groups::registerMessage(not_null<HistoryItem*> item) {
if (!isGrouped(item)) {
return;
}
const auto i = _groups.emplace(item->groupId(), Group()).first;
auto &items = i->second.items;
if (items.size() < kMaxItemsInGroup) {
items.insert(findPositionForItem(items, item), item);
if (items.size() > 1) {
refreshViews(items);
}
}
}
void Groups::unregisterMessage(not_null<const HistoryItem*> item) {
const auto groupId = item->groupId();
if (!groupId) {
return;
}
const auto i = _groups.find(groupId);
if (i != end(_groups)) {
auto &items = i->second.items;
const auto removed = ranges::remove(items, item);
const auto last = end(items);
if (removed != last) {
items.erase(removed, last);
if (!items.empty()) {
refreshViews(items);
} else {
_groups.erase(i);
}
}
}
}
void Groups::refreshMessage(
not_null<HistoryItem*> item,
bool justRefreshViews) {
if (!isGrouped(item)) {
unregisterMessage(item);
return;
}
if (!item->isRegular() && !item->isScheduled()) {
return;
}
const auto groupId = item->groupId();
const auto i = _groups.find(groupId);
if (i == end(_groups)) {
registerMessage(item);
return;
}
auto &items = i->second.items;
if (justRefreshViews) {
refreshViews(items);
return;
}
const auto position = findPositionForItem(items, item);
auto current = ranges::find(items, item);
if (current == end(items)) {
items.insert(position, item);
} else if (position == current + 1) {
return;
} else if (position > current + 1) {
for (++current; current != position; ++current) {
std::swap(*(current - 1), *current);
}
} else if (position < current) {
for (; current != position; --current) {
std::swap(*(current - 1), *current);
}
} else {
Unexpected("Position of item in Groups::refreshMessage().");
}
refreshViews(items);
}
HistoryItemsList::const_iterator Groups::findPositionForItem(
const HistoryItemsList &group,
not_null<HistoryItem*> item) {
const auto last = end(group);
const auto itemId = item->id;
for (auto result = begin(group); result != last; ++result) {
if ((*result)->id > itemId) {
return result;
}
}
return last;
}
const Group *Groups::find(not_null<const HistoryItem*> item) const {
const auto groupId = item->groupId();
if (!groupId) {
return nullptr;
}
const auto i = _groups.find(groupId);
if (i != _groups.end()) {
const auto &result = i->second;
if (result.items.size() > 1) {
return &result;
}
}
return nullptr;
}
void Groups::refreshViews(const HistoryItemsList &items) {
if (items.empty()) {
return;
}
for (const auto &item : items) {
_data->requestItemViewRefresh(item);
item->invalidateChatListEntry();
}
}
not_null<HistoryItem*> Groups::findItemToEdit(
not_null<HistoryItem*> item) const {
const auto group = find(item);
if (!group) {
return item;
}
const auto &list = group->items;
const auto it = ranges::find_if(
list,
ranges::not_fn(&HistoryItem::emptyText));
if (it == end(list)) {
return list.front();
}
return (*it);
}
} // namespace Data
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