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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/attribution_reporting/aggregatable_trigger_data.h"
#include <stddef.h>
#include <limits>
#include <string>
#include <utility>
#include "base/containers/flat_set.h"
#include "base/types/expected.h"
#include "base/types/expected_macros.h"
#include "base/values.h"
#include "components/attribution_reporting/constants.h"
#include "components/attribution_reporting/filters.h"
#include "components/attribution_reporting/parsing_utils.h"
#include "components/attribution_reporting/trigger_registration_error.mojom.h"
#include "third_party/abseil-cpp/absl/numeric/int128.h"
namespace attribution_reporting {
namespace {
using ::attribution_reporting::mojom::TriggerRegistrationError;
base::expected<absl::uint128, TriggerRegistrationError> ParseKeyPiece(
const base::Value::Dict& registration) {
const base::Value* v = registration.Find(kKeyPiece);
if (!v) {
return base::unexpected(
TriggerRegistrationError::kAggregatableTriggerDataKeyPieceMissing);
}
return ParseAggregationKeyPiece(*v).transform_error([](ParseError) {
return TriggerRegistrationError::kAggregatableTriggerDataKeyPieceInvalid;
});
}
base::expected<AggregatableTriggerData::Keys, TriggerRegistrationError>
ParseSourceKeys(base::Value::Dict& registration) {
base::Value* v = registration.Find(kSourceKeys);
if (!v) {
return AggregatableTriggerData::Keys();
}
base::Value::List* l = v->GetIfList();
if (!l) {
return base::unexpected(
TriggerRegistrationError::kAggregatableTriggerDataSourceKeysInvalid);
}
return ExtractStringSet(
std::move(*l),
/*max_string_size=*/std::numeric_limits<size_t>::max(),
/*max_set_size=*/std::numeric_limits<size_t>::max())
.transform_error([](StringSetError) {
return TriggerRegistrationError::
kAggregatableTriggerDataSourceKeysInvalid;
});
}
void SerializeSourceKeysIfNotEmpty(base::Value::Dict& dict,
const AggregatableTriggerData::Keys& keys) {
if (keys.empty()) {
return;
}
auto list = base::Value::List::with_capacity(keys.size());
for (const std::string& key : keys) {
list.Append(key);
}
dict.Set(kSourceKeys, std::move(list));
}
} // namespace
// static
base::expected<AggregatableTriggerData, TriggerRegistrationError>
AggregatableTriggerData::FromJSON(base::Value& value) {
base::Value::Dict* dict = value.GetIfDict();
if (!dict) {
return base::unexpected(
TriggerRegistrationError::kAggregatableTriggerDataWrongType);
}
ASSIGN_OR_RETURN(auto key_piece, ParseKeyPiece(*dict));
ASSIGN_OR_RETURN(auto source_keys, ParseSourceKeys(*dict));
ASSIGN_OR_RETURN(auto filters, FilterPair::FromJSON(*dict));
return AggregatableTriggerData(key_piece, std::move(source_keys),
std::move(filters));
}
AggregatableTriggerData::AggregatableTriggerData() = default;
AggregatableTriggerData::AggregatableTriggerData(absl::uint128 key_piece,
Keys source_keys,
FilterPair filters)
: key_piece_(key_piece),
source_keys_(std::move(source_keys)),
filters_(std::move(filters)) {}
AggregatableTriggerData::~AggregatableTriggerData() = default;
AggregatableTriggerData::AggregatableTriggerData(
const AggregatableTriggerData&) = default;
AggregatableTriggerData& AggregatableTriggerData::operator=(
const AggregatableTriggerData&) = default;
AggregatableTriggerData::AggregatableTriggerData(AggregatableTriggerData&&) =
default;
AggregatableTriggerData& AggregatableTriggerData::operator=(
AggregatableTriggerData&&) = default;
base::Value::Dict AggregatableTriggerData::ToJson() const {
base::Value::Dict dict;
dict.Set(kKeyPiece, HexEncodeAggregationKey(key_piece_));
SerializeSourceKeysIfNotEmpty(dict, source_keys_);
filters_.SerializeIfNotEmpty(dict);
return dict;
}
} // namespace attribution_reporting
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