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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 "chrome/browser/chromeos/extensions/desk_api/desk_api_extension_manager.h"
#include <memory>
#include "base/files/file_path.h"
#include "base/functional/bind.h"
#include "base/functional/callback_forward.h"
#include "base/strings/string_util.h"
#include "chrome/browser/enterprise/util/affiliation.h"
#include "chrome/browser/extensions/component_loader.h"
#include "chrome/browser/extensions/extension_service.h"
#include "chrome/common/extensions/extension_constants.h"
#include "chrome/common/pref_names.h"
#include "chrome/grit/browser_resources.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_service.h"
#include "extensions/browser/extension_system.h"
#include "extensions/common/url_pattern.h"
#include "ui/base/resource/resource_bundle.h"
using ::extensions::ComponentLoader;
namespace chromeos {
namespace {
// Tag in the manifest to be replaced.
constexpr char kDomainsTag[] = "\"$DOMAIN_LIST\"";
} // namespace
void DeskApiExtensionManager::Delegate::InstallExtension(
ComponentLoader* component_loader,
const std::string& manifest_content) {
component_loader->Add(manifest_content,
base::FilePath(FILE_PATH_LITERAL("chromeos/desk_api")));
// Force reload extension.
component_loader->Reload(extension_misc::kDeskApiExtensionId);
}
void DeskApiExtensionManager::Delegate::UninstallExtension(
ComponentLoader* component_loader) {
component_loader->Remove(extension_misc::kDeskApiExtensionId);
}
bool DeskApiExtensionManager::Delegate::IsProfileAffiliated(
Profile* profile) const {
if (profile->IsOffTheRecord())
return false;
return ::enterprise_util::IsProfileAffiliated(profile);
}
bool DeskApiExtensionManager::Delegate::IsExtensionInstalled(
ComponentLoader* component_loader) const {
return component_loader->Exists(extension_misc::kDeskApiExtensionId);
}
DeskApiExtensionManager::DeskApiExtensionManager(
ComponentLoader* component_loader,
Profile* profile,
std::unique_ptr<DeskApiExtensionManager::Delegate> delegate)
: component_loader_(component_loader),
profile_(profile),
delegate_(std::move(delegate)) {
Init();
}
DeskApiExtensionManager::~DeskApiExtensionManager() = default;
void DeskApiExtensionManager::Init() {
LoadOrUnloadExtension();
registrar_.Init(profile_->GetPrefs());
if (delegate_->IsProfileAffiliated(profile_)) {
// Setup registrar so it starts listening to relevant pref changes.
registrar_.Add(::prefs::kDeskAPIThirdPartyAccessEnabled,
base::BindRepeating(&DeskApiExtensionManager::OnPrefChanged,
weak_ptr_factory_.GetWeakPtr()));
registrar_.Add(::prefs::kDeskAPIThirdPartyAllowlist,
base::BindRepeating(&DeskApiExtensionManager::OnPrefChanged,
weak_ptr_factory_.GetWeakPtr()));
}
}
bool DeskApiExtensionManager::CanInstallExtension() const {
if (!delegate_->IsProfileAffiliated(profile_)) {
return false;
}
const auto& pref_service = *profile_->GetPrefs();
// Defaults to not enabled.
if (!pref_service.HasPrefPath(::prefs::kDeskAPIThirdPartyAccessEnabled))
return false;
if (!pref_service.GetBoolean(::prefs::kDeskAPIThirdPartyAccessEnabled))
return false;
const std::string manifest = GetManifest();
// Cannot install extension when there is no valid domains in allowlist.
if (manifest.empty())
return false;
return true;
}
std::string DeskApiExtensionManager::GetManifest() const {
const auto* pref_service = profile_->GetPrefs();
std::vector<std::string> domains;
// Prepare the domain allowlist to follow the Chrome extension Manifest V3
// `externally_connectable` `matches` property format. See more
// https://developer.chrome.com/docs/extensions/mv3/manifest/externally_connectable/#reference
for (const auto& domain :
pref_service->GetList(::prefs::kDeskAPIThirdPartyAllowlist)) {
URLPattern pattern(URLPattern::SCHEME_ALL);
if (pattern.Parse(domain.GetString()) !=
URLPattern::ParseResult::kSuccess) {
LOG(WARNING) << "Desk API ignored invalid URL pattern: "
<< domain.GetString();
continue;
}
domains.push_back("\"" + domain.GetString() + "\"");
}
if (domains.size() == 0) {
return "";
}
const std::string domain_list = base::JoinString(domains, ",");
std::string manifest_contents =
ui::ResourceBundle::GetSharedInstance().LoadDataResourceString(
IDR_DESK_API_MANIFEST);
DCHECK(manifest_contents.find(kDomainsTag) != std::string::npos);
base::ReplaceFirstSubstringAfterOffset(&manifest_contents, 0, kDomainsTag,
domain_list);
return manifest_contents;
}
void DeskApiExtensionManager::OnPrefChanged() {
LoadOrUnloadExtension();
}
void DeskApiExtensionManager::LoadOrUnloadExtension() {
if (CanInstallExtension()) {
// This will update the extension if the allowlist changes, even if the
// extension version remains the same.
delegate_->InstallExtension(component_loader_, GetManifest());
return;
}
// Remove/unload component extension if installed because it does
// not meet necessary pre-conditions.
RemoveExtensionIfInstalled();
}
void DeskApiExtensionManager::RemoveExtensionIfInstalled() {
if (delegate_->IsExtensionInstalled(component_loader_)) {
delegate_->UninstallExtension(component_loader_);
}
}
} // namespace chromeos
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