// 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 "content/browser/private_aggregation/private_aggregation_manager.h"

#include <stddef.h>

#include <optional>
#include <string>

#include "base/numerics/safe_conversions.h"
#include "content/browser/private_aggregation/private_aggregation_manager_impl.h"
#include "content/browser/storage_partition_impl.h"
#include "content/public/browser/browser_context.h"

namespace content {

PrivateAggregationManager* PrivateAggregationManager::GetManager(
    BrowserContext& browser_context) {
  return static_cast<StoragePartitionImpl*>(
             browser_context.GetDefaultStoragePartition())
      ->GetPrivateAggregationManager();
}

bool PrivateAggregationManager::ShouldSendReportDeterministically(
    PrivateAggregationCallerApi caller_api,
    const std::optional<std::string>& context_id,
    base::StrictNumeric<size_t> filtering_id_max_bytes,
    std::optional<size_t> requested_max_contributions) {
  if (context_id.has_value() ||
      filtering_id_max_bytes !=
          PrivateAggregationHost::kDefaultFilteringIdMaxBytes) {
    return true;
  }
  if (requested_max_contributions.has_value()) {
    const size_t default_max_contributions =
        PrivateAggregationHost::GetEffectiveMaxContributions(
            caller_api, /*requested_max_contributions=*/std::nullopt);
    // We deviate from the spec by using `requested_max_contributions` directly,
    // rather than first computing the effective max contributions. This is fine
    // because we know that `GetEffectiveMaxContributions()` preserves equality
    // to each of the API-specific default values.
    return *requested_max_contributions != default_max_contributions;
  }
  return false;
}

}  // namespace content