tdesktop/Telegram/SourceFiles/data/data_search_controller.h

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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
*/
#pragma once
#include "mtproto/sender.h"
#include "data/data_sparse_ids.h"
#include "storage/storage_sparse_ids_list.h"
#include "storage/storage_shared_media.h"
#include "base/value_ordering.h"
#include "base/timer.h"
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namespace Data {
enum class LoadDirection : char;
} // namespace Data
namespace Api {
struct SearchResult {
std::vector<MsgId> messageIds;
MsgRange noSkipRange;
int fullCount = 0;
};
MTPmessages_Search PrepareSearchRequest(
not_null<PeerData*> peer,
Storage::SharedMediaType type,
const QString &query,
MsgId messageId,
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Data::LoadDirection direction);
SearchResult ParseSearchResult(
not_null<PeerData*> peer,
Storage::SharedMediaType type,
MsgId messageId,
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Data::LoadDirection direction,
const MTPmessages_Messages &data);
class SearchController : private MTP::Sender {
public:
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using IdsList = Storage::SparseIdsList;
struct Query {
using MediaType = Storage::SharedMediaType;
PeerId peerId = 0;
PeerId migratedPeerId = 0;
MediaType type = MediaType::kCount;
QString query;
// from_id, min_date, max_date
friend inline auto value_ordering_helper(const Query &value) {
return std::tie(
value.peerId,
value.migratedPeerId,
value.type,
value.query);
}
};
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struct SavedState {
Query query;
IdsList peerList;
base::optional<IdsList> migratedList;
};
void setQuery(const Query &query);
bool hasInCache(const Query &query) const;
Query query() const {
Expects(_current != _cache.cend());
return _current->first;
}
rpl::producer<SparseIdsMergedSlice> idsSlice(
SparseIdsMergedSlice::UniversalMsgId aroundId,
int limitBefore,
int limitAfter);
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SavedState saveState();
void restoreState(SavedState &&state);
private:
struct Data {
explicit Data(not_null<PeerData*> peer) : peer(peer) {
}
not_null<PeerData*> peer;
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IdsList list;
base::flat_map<
SparseIdsSliceBuilder::AroundData,
rpl::lifetime> requests;
};
using SliceUpdate = Storage::SparseIdsSliceUpdate;
struct CacheEntry {
CacheEntry(const Query &query);
Data peerData;
base::optional<Data> migratedData;
};
struct CacheLess {
inline bool operator()(const Query &a, const Query &b) const {
return (a < b);
}
};
using Cache = base::flat_map<
Query,
std::unique_ptr<CacheEntry>,
CacheLess>;
rpl::producer<SparseIdsSlice> simpleIdsSlice(
PeerId peerId,
MsgId aroundId,
const Query &query,
int limitBefore,
int limitAfter);
void requestMore(
const SparseIdsSliceBuilder::AroundData &key,
const Query &query,
Data *listData);
Cache _cache;
Cache::iterator _current = _cache.end();
};
class DelayedSearchController {
public:
DelayedSearchController();
using Query = SearchController::Query;
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using SavedState = SearchController::SavedState;
void setQuery(const Query &query);
void setQuery(const Query &query, TimeMs delay);
void setQueryFast(const Query &query);
Query currentQuery() const {
return _controller.query();
}
rpl::producer<SparseIdsMergedSlice> idsSlice(
SparseIdsMergedSlice::UniversalMsgId aroundId,
int limitBefore,
int limitAfter) {
return _controller.idsSlice(
aroundId,
limitBefore,
limitAfter);
}
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rpl::producer<QString> currentQueryValue() const {
return _currentQueryChanges.events_starting_with(
currentQuery().query);
}
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SavedState saveState() {
return _controller.saveState();
}
void restoreState(SavedState &&state) {
_controller.restoreState(std::move(state));
}
private:
SearchController _controller;
Query _nextQuery;
base::Timer _timer;
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rpl::event_stream<QString> _currentQueryChanges;
};
} // namespace Api