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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/chromeos/policy/dlp/dlp_content_restriction_set.h"
#include <algorithm>
#include "base/containers/flat_map.h"
#include "base/no_destructor.h"
#include "chrome/browser/chromeos/policy/dlp/dlp_rules_manager.h"
#include "chrome/browser/chromeos/policy/dlp/dlp_rules_manager_factory.h"
#include "url/gurl.h"
namespace policy {
namespace {
static base::NoDestructor<base::flat_map<GURL, DlpContentRestrictionSet>>
g_restrictions_for_url_for_testing;
}
DlpContentRestrictionSet::DlpContentRestrictionSet() {
restrictions_.fill(RestrictionLevelAndUrl());
}
DlpContentRestrictionSet::DlpContentRestrictionSet(
DlpContentRestriction restriction,
DlpRulesManager::Level level) {
restrictions_.fill(RestrictionLevelAndUrl());
restrictions_[static_cast<int>(restriction)].level = level;
}
DlpContentRestrictionSet::DlpContentRestrictionSet(
const DlpContentRestrictionSet& restriction_set) = default;
DlpContentRestrictionSet& DlpContentRestrictionSet::operator=(
const DlpContentRestrictionSet& other) = default;
DlpContentRestrictionSet::~DlpContentRestrictionSet() = default;
void DlpContentRestrictionSet::SetRestriction(DlpContentRestriction restriction,
DlpRulesManager::Level level,
const GURL& url) {
if (level > restrictions_[static_cast<int>(restriction)].level) {
restrictions_[static_cast<int>(restriction)] =
RestrictionLevelAndUrl(level, url);
}
}
DlpRulesManager::Level DlpContentRestrictionSet::GetRestrictionLevel(
DlpContentRestriction restriction) const {
return restrictions_[static_cast<int>(restriction)].level;
}
const GURL& DlpContentRestrictionSet::GetRestrictionUrl(
DlpContentRestriction restriction) const {
return restrictions_[static_cast<int>(restriction)].url;
}
RestrictionLevelAndUrl DlpContentRestrictionSet::GetRestrictionLevelAndUrl(
DlpContentRestriction restriction) const {
return restrictions_[static_cast<int>(restriction)];
}
bool DlpContentRestrictionSet::IsEmpty() const {
for (size_t i = 0; i < restrictions_.size(); ++i) {
if (restrictions_[i].level != DlpRulesManager::Level::kNotSet)
return false;
}
return true;
}
void DlpContentRestrictionSet::UnionWith(
const DlpContentRestrictionSet& other) {
for (size_t i = 0; i < restrictions_.size(); ++i) {
if (other.restrictions_[i].level > restrictions_[i].level) {
restrictions_[i] = other.restrictions_[i];
}
}
}
DlpContentRestrictionSet DlpContentRestrictionSet::DifferenceWith(
const DlpContentRestrictionSet& other) const {
// Leave only the restrictions that are present in |this|, but not in |other|.
DlpContentRestrictionSet result;
for (size_t i = 0; i < restrictions_.size(); ++i) {
if (restrictions_[i].level > other.restrictions_[i].level) {
result.restrictions_[i] = restrictions_[i];
}
}
return result;
}
// static
DlpContentRestrictionSet DlpContentRestrictionSet::GetForURL(const GURL& url) {
if (g_restrictions_for_url_for_testing->find(url) !=
g_restrictions_for_url_for_testing->end()) {
return g_restrictions_for_url_for_testing->at(url);
}
DlpContentRestrictionSet set;
DlpRulesManager* dlp_rules_manager =
DlpRulesManagerFactory::GetForPrimaryProfile();
if (!dlp_rules_manager)
return set;
const size_t kRestrictionsCount = 4;
static constexpr std::array<
std::pair<DlpRulesManager::Restriction, DlpContentRestriction>,
kRestrictionsCount>
kRestrictionsArray = {{{DlpRulesManager::Restriction::kScreenshot,
DlpContentRestriction::kScreenshot},
{DlpRulesManager::Restriction::kPrivacyScreen,
DlpContentRestriction::kPrivacyScreen},
{DlpRulesManager::Restriction::kPrinting,
DlpContentRestriction::kPrint},
{DlpRulesManager::Restriction::kScreenShare,
DlpContentRestriction::kScreenShare}}};
for (const auto& restriction : kRestrictionsArray) {
DlpRulesManager::Level level =
dlp_rules_manager->IsRestricted(url, restriction.first);
if (level == DlpRulesManager::Level::kNotSet ||
level == DlpRulesManager::Level::kAllow)
continue;
set.SetRestriction(restriction.second, level, url);
}
return set;
}
// static
void DlpContentRestrictionSet::SetRestrictionsForURLForTesting(
const GURL& url,
const DlpContentRestrictionSet& restrictions) {
g_restrictions_for_url_for_testing->insert_or_assign(url, restrictions);
}
} // namespace policy
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