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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/file_manager/indexing/ram_storage.h"
#include <algorithm>
#include <cstdint>
#include <tuple>
#include <utility>
#include "base/logging.h"
#include "chromeos/ash/components/file_manager/indexing/match.h"
namespace ash::file_manager {
RamStorage::RamStorage() = default;
RamStorage::~RamStorage() = default;
const std::set<int64_t> RamStorage::GetTermIdsForUrl(int64_t url_id) const {
auto url_term_it = plain_index_.find(url_id);
if (url_term_it == plain_index_.end()) {
return empty_id_set_;
}
return url_term_it->second;
}
const std::set<int64_t> RamStorage::GetUrlIdsForTermId(int64_t term_id) const {
auto term_match = posting_lists_.find(term_id);
if (term_match == posting_lists_.end()) {
return empty_id_set_;
}
return term_match->second;
}
size_t RamStorage::AddToPostingList(int64_t term_id, int64_t url_id) {
auto it = posting_lists_.find(term_id);
size_t count;
if (it == posting_lists_.end()) {
posting_lists_.emplace(std::piecewise_construct,
std::forward_as_tuple(term_id),
std::forward_as_tuple(std::set<int64_t>{url_id}));
count = 1;
} else {
auto ret = it->second.emplace(url_id);
count = ret.second ? 1 : 0;
}
AddToPlainIndex(url_id, term_id);
return count;
}
size_t RamStorage::DeleteFromPostingList(int64_t term_id, int64_t url_id) {
auto it = posting_lists_.find(term_id);
size_t count;
if (it == posting_lists_.end()) {
count = 0;
} else {
count = it->second.erase(url_id);
}
DeleteFromPlainIndex(url_id, term_id);
return count;
}
int64_t RamStorage::GetTokenId(const std::string& token_bytes) const {
auto it = token_map_.find(token_bytes);
if (it != token_map_.end()) {
return it->second;
}
return -1;
}
int64_t RamStorage::GetOrCreateTokenId(const std::string& token_bytes) {
int64_t token_id = GetTokenId(token_bytes);
if (token_id >= 0) {
return token_id;
}
const int64_t this_token_id = ++token_id_;
token_map_.emplace(std::make_pair(token_bytes, this_token_id));
return this_token_id;
}
int64_t RamStorage::GetTermId(const Term& term) const {
int64_t token_id = GetTokenId(term.token_bytes());
if (token_id == -1) {
return -1;
}
std::tuple<std::string, int64_t> term_tuple{term.field(), token_id};
auto term_it = term_map_.find(term_tuple);
if (term_it == term_map_.end()) {
return -1;
}
return term_it->second;
}
int64_t RamStorage::GetOrCreateTermId(const Term& term) {
int64_t term_id = GetTermId(term);
if (term_id >= 0) {
return term_id;
}
int64_t this_term_id = ++term_id_;
int64_t token_id = GetOrCreateTokenId(term.token_bytes());
term_map_.emplace(
std::make_pair(std::make_tuple(term.field(), token_id), this_term_id));
return this_term_id;
}
int64_t RamStorage::GetUrlId(const GURL& url) const {
auto it = url_to_id_.find(url);
return (it != url_to_id_.end()) ? it->second : -1;
}
int64_t RamStorage::GetOrCreateUrlId(const GURL& url) {
int64_t url_id = GetUrlId(url);
if (url_id >= 0) {
return url_id;
}
int64_t this_url_id = ++url_id_;
url_to_id_.emplace(std::make_pair(url, this_url_id));
return this_url_id;
}
int64_t RamStorage::MoveUrl(const GURL& from, const GURL& to) {
auto it = url_to_id_.find(from);
if (it == url_to_id_.end()) {
return -1;
}
const int64_t url_id = it->second;
url_to_id_.erase(it);
url_to_id_.emplace(std::make_pair(to, url_id));
// In RAM we store the whole file info object. Thus we have two places
// where the URL may be stored; if we have the corresponding file info
// correct its URL, too.
auto file_info_it = url_id_to_file_info_.find(url_id);
if (file_info_it != url_id_to_file_info_.end()) {
file_info_it->second.file_url = to;
}
return url_id;
}
int64_t RamStorage::DeleteUrl(const GURL& url) {
auto it = url_to_id_.find(url);
if (it == url_to_id_.end()) {
return -1;
}
const int64_t url_id = it->second;
url_to_id_.erase(it);
return url_id;
}
int64_t RamStorage::PutFileInfo(const FileInfo& file_info) {
int64_t url_id = GetOrCreateUrlId(file_info.file_url);
if (url_id == -1) {
return -1;
}
auto it = url_id_to_file_info_.find(url_id);
if (it == url_id_to_file_info_.end()) {
url_id_to_file_info_.emplace(std::make_pair(url_id, file_info));
} else {
it->second = file_info;
}
return url_id;
}
std::optional<FileInfo> RamStorage::GetFileInfo(int64_t url_id) const {
auto file_info_it = url_id_to_file_info_.find(url_id);
if (file_info_it == url_id_to_file_info_.end()) {
return std::nullopt;
}
return file_info_it->second;
}
int64_t RamStorage::DeleteFileInfo(int64_t url_id) {
auto file_info_it = url_id_to_file_info_.find(url_id);
if (file_info_it == url_id_to_file_info_.end()) {
return url_id;
}
url_id_to_file_info_.erase(file_info_it);
return url_id;
}
size_t RamStorage::AddTermIdsForUrl(const std::set<int64_t>& term_ids,
int64_t url_id) {
size_t added_terms_count = 0;
for (const int64_t term_id : term_ids) {
added_terms_count += AddToPostingList(term_id, url_id);
}
return added_terms_count;
}
size_t RamStorage::DeleteTermIdsForUrl(const std::set<int64_t>& term_ids,
int64_t url_id) {
size_t deleted_terms_count = 0;
for (const int64_t term_id : term_ids) {
deleted_terms_count += DeleteFromPostingList(term_id, url_id);
}
return deleted_terms_count;
}
void RamStorage::AddToPlainIndex(int64_t url_id, int64_t term_id) {
auto it = plain_index_.find(url_id);
if (it == plain_index_.end()) {
plain_index_.emplace(std::piecewise_construct,
std::forward_as_tuple(url_id),
std::forward_as_tuple(std::set<int64_t>{term_id}));
} else {
it->second.emplace(term_id);
}
}
void RamStorage::DeleteFromPlainIndex(int64_t url_id, int64_t term_id) {
auto it = plain_index_.find(url_id);
if (it != plain_index_.end()) {
it->second.erase(term_id);
}
}
} // namespace ash::file_manager
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