Memento Memento::Default(Dialogs::Key key) {
if (const auto peer = key.peer()) {
return Memento(peer->id, DefaultSection(key));
}
return Memento(key.feed(), DefaultSection(key));
}
void Controller::showJumpToDate(Dialogs::Key chat, QDate requestedDate) {
const auto currentPeerDate = [&] {
if (const auto history = chat.history()) {
if (history->scrollTopItem) {
return history->scrollTopItem->dateTime().date();
} else if (history->loadedAtTop()
&& !history->isEmpty()
&& history->peer->migrateFrom()) {
if (const auto migrated = history->owner().historyLoaded(history->peer->migrateFrom())) {
if (migrated->scrollTopItem) {
// We're up in the migrated history.
// So current date is the date of first message here.
return history->blocks.front()->messages.front()->dateTime().date();
}
}
} else if (history->chatListTimeId() != 0) {
return ParseDateTime(history->chatListTimeId()).date();
}
} else if (const auto feed = chat.feed()) {
/*if (chatScrollPosition(feed)) { // #TODO feeds save position
} else */if (feed->chatListTimeId() != 0) {
return ParseDateTime(feed->chatListTimeId()).date();
}
}
return QDate::currentDate();
};
const auto maxPeerDate = [](Dialogs::Key chat) {
if (auto history = chat.history()) {
if (const auto channel = history->peer->migrateTo()) {
history = channel->owner().historyLoaded(channel);
}
if (history && history->chatListTimeId() != 0) {
return ParseDateTime(history->chatListTimeId()).date();
}
} else if (const auto feed = chat.feed()) {
if (feed->chatListTimeId() != 0) {
return ParseDateTime(feed->chatListTimeId()).date();
}
}
return QDate::currentDate();
};
const auto minPeerDate = [](Dialogs::Key chat) {
const auto startDate = [] {
// Telegram was launched in August 2013 :)
return QDate(2013, 8, 1);
};
if (const auto history = chat.history()) {
if (const auto chat = history->peer->migrateFrom()) {
if (const auto history = chat->owner().historyLoaded(chat)) {
if (history->loadedAtTop()) {
if (!history->isEmpty()) {
return history->blocks.front()->messages.front()->dateTime().date();
}
} else {
return startDate();
}
}
}
if (history->loadedAtTop()) {
if (!history->isEmpty()) {
return history->blocks.front()->messages.front()->dateTime().date();
}
return QDate::currentDate();
}
} else if (const auto feed = chat.feed()) {
return startDate();
}
return startDate();
};
const auto highlighted = requestedDate.isNull()
? currentPeerDate()
: requestedDate;
const auto month = highlighted;
auto callback = [=](const QDate &date) {
session().api().jumpToDate(chat, date);
};
auto box = Box<CalendarBox>(
month,
highlighted,
std::move(callback));
box->setMinDate(minPeerDate(chat));
box->setMaxDate(maxPeerDate(chat));
Ui::show(std::move(box));
}