bool DBClientCursor::more() {
if ( pos < nReturned )
return true;
if ( cursorId == 0 )
return false;
requestMore();
return pos < nReturned;
}
/** If true, safe to call next(). Requests more from server if necessary. */
bool DBClientCursor::more() {
if (!_putBack.empty())
return true;
if (haveLimit && batch.pos >= nToReturn)
return false;
if (batch.pos < batch.nReturned)
return true;
if (cursorId == 0)
return false;
requestMore();
return batch.pos < batch.nReturned;
}
/** If true, safe to call next(). Requests more from server if necessary. */
bool DBClientCursor::more() {
_assertIfNull();
if ( !_putBack.empty() )
return true;
if (haveLimit && pos >= nToReturn)
return false;
if ( pos < nReturned )
return true;
if ( cursorId == 0 )
return false;
requestMore();
return pos < nReturned;
}
rpl::producer<SparseIdsSlice> SearchController::simpleIdsSlice(
PeerId peerId,
MsgId aroundId,
const Query &query,
int limitBefore,
int limitAfter) {
Expects(peerId != 0);
Expects(IsServerMsgId(aroundId) || (aroundId == 0));
Expects((aroundId != 0)
|| (limitBefore == 0 && limitAfter == 0));
Expects((query.peerId == peerId)
|| (query.migratedPeerId == peerId));
auto it = _cache.find(query);
if (it == _cache.end()) {
return [=](auto) { return rpl::lifetime(); };
}
auto listData = (peerId == query.peerId)
? &it->second->peerData
: &*it->second->migratedData;
return [=](auto consumer) {
auto lifetime = rpl::lifetime();
auto builder = lifetime.make_state<SparseIdsSliceBuilder>(
aroundId,
limitBefore,
limitAfter);
builder->insufficientAround(
) | rpl::start_with_next([=](
const SparseIdsSliceBuilder::AroundData &data) {
requestMore(data, query, listData);
}, lifetime);
auto pushNextSnapshot = [=] {
consumer.put_next(builder->snapshot());
};
listData->list.sliceUpdated(
) | rpl::filter([=](const SliceUpdate &update) {
return builder->applyUpdate(update);
}) | rpl::start_with_next(pushNextSnapshot, lifetime);
Auth().data().itemRemoved(
) | rpl::filter([=](not_null<const HistoryItem*> item) {
return (item->history()->peer->id == peerId);
}) | rpl::filter([=](not_null<const HistoryItem*> item) {
return builder->removeOne(item->id);
}) | rpl::start_with_next(pushNextSnapshot, lifetime);
Auth().data().historyCleared(
) | rpl::filter([=](not_null<const History*> history) {
return (history->peer->id == peerId);
}) | rpl::filter([=] {
return builder->removeAll();
}) | rpl::start_with_next(pushNextSnapshot, lifetime);
using Result = Storage::SparseIdsListResult;
listData->list.query(Storage::SparseIdsListQuery(
aroundId,
limitBefore,
limitAfter
)) | rpl::filter([=](const Result &result) {
return builder->applyInitial(result);
}) | rpl::start_with_next_done(
pushNextSnapshot,
[=] { builder->checkInsufficient(); },
lifetime);
return lifetime;
};
}