components/permissions/contexts/geolocation_permission_context.cc

// 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 "components/permissions/contexts/geolocation_permission_context.h"

#include <variant>

#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_functions.h"
#include "base/values.h"
#include "components/content_settings/browser/page_specific_content_settings.h"
#include "components/content_settings/core/common/content_settings.h"
#include "components/content_settings/core/common/content_settings_types.h"
#include "components/content_settings/core/common/content_settings_utils.h"
#include "components/content_settings/core/common/features.h"
#include "components/permissions/features.h"
#include "components/permissions/permission_context_base.h"
#include "components/permissions/permission_request_id.h"
#include "components/permissions/permissions_client.h"
#include "components/permissions/resolvers/geolocation_permission_resolver.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/device_service.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "services/network/public/mojom/permissions_policy/permissions_policy_feature.mojom.h"
#include "url/origin.h"

namespace permissions {

GeolocationPermissionContext::GeolocationPermissionContext(
    content::BrowserContext* browser_context,
    std::unique_ptr<Delegate> delegate)
    : PermissionContextBase(
          browser_context,
          base::FeatureList::IsEnabled(
              content_settings::features::kApproximateGeolocationPermission)
              ? ContentSettingsType::GEOLOCATION_WITH_OPTIONS
              : ContentSettingsType::GEOLOCATION,
          network::mojom::PermissionsPolicyFeature::kGeolocation),
      delegate_(std::move(delegate)) {}

GeolocationPermissionContext::~GeolocationPermissionContext() = default;

void GeolocationPermissionContext::DecidePermission(
    std::unique_ptr<permissions::PermissionRequestData> request_data,
    BrowserPermissionCallback callback) {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);

  if (!delegate_->DecidePermission(*request_data, &callback, this)) {
    DCHECK(callback);
    PermissionContextBase::DecidePermission(std::move(request_data),
                                            std::move(callback));
  }
}

void GeolocationPermissionContext::UpdateSetting(
    const PermissionRequestData& request_data,
    PermissionSetting setting,
    bool is_one_time) {
  // TODO(crbug.com/425642101): Remove (i.e. use base implementation) once
  // content settings are migrated to the PermissionSettingsRegistry.

  if (base::FeatureList::IsEnabled(
          content_settings::features::kApproximateGeolocationPermission)) {
    PermissionContextBase::UpdateSetting(request_data, std::move(setting),
                                         is_one_time);
  } else {
    DCHECK_EQ(request_data.requesting_origin,
              request_data.requesting_origin.DeprecatedGetOriginAsURL());
    DCHECK_EQ(request_data.embedding_origin,
              request_data.embedding_origin.DeprecatedGetOriginAsURL());
    content_settings::ContentSettingConstraints constraints;
    constraints.set_session_model(
        is_one_time ? content_settings::mojom::SessionModel::ONE_TIME
                    : content_settings::mojom::SessionModel::DURABLE);

    ContentSetting content_setting = std::get<ContentSetting>(setting);

    // The Permissions module in Safety check will revoke permissions after
    // a finite amount of time if the permission can be revoked.
    if (content_settings::CanBeAutoRevokedAsUnusedPermission(
            content_settings_type(), base::Value(content_setting),
            is_one_time)) {
      constraints.set_track_last_visit_for_autoexpiration(true);
    }

    if (is_one_time) {
      if (content_settings::ShouldTypeExpireActively(content_settings_type())) {
        constraints.set_lifetime(kOneTimePermissionMaximumLifetime);
      }
    }

    PermissionsClient::Get()
        ->GetSettingsMap(browser_context())
        ->SetContentSettingDefaultScope(
            request_data.requesting_origin, request_data.embedding_origin,
            content_settings_type(), content_setting, constraints);
  }
}

base::WeakPtr<GeolocationPermissionContext>
GeolocationPermissionContext::GetWeakPtr() {
  return weak_factory_.GetWeakPtr();
}

std::unique_ptr<PermissionResolver>
GeolocationPermissionContext::CreatePermissionResolver(
    const blink::mojom::PermissionDescriptorPtr& permission_descriptor) const {
  if (base::FeatureList::IsEnabled(
          content_settings::features::kApproximateGeolocationPermission)) {
    // TODO(crbug.com/430586927) The geolocation PermissionDescriptor doesn't
    // yet support the approximate request, hence for the time being we treat
    // each request as a precise request.
    return std::make_unique<GeolocationPermissionResolver>(
        /*requested_precise*/ true);
  } else {
    return PermissionContextBase::CreatePermissionResolver(
        permission_descriptor);
  }
}

void GeolocationPermissionContext::UpdateTabContext(
    const PermissionRequestData& request_data,
    bool allowed) {
  content_settings::PageSpecificContentSettings* content_settings =
      content_settings::PageSpecificContentSettings::GetForFrame(
          request_data.id.global_render_frame_host_id());

  // WebContents might not exist (extensions) or no longer exist. In which
  // case, PageSpecificContentSettings will be null.
  if (content_settings) {
    if (allowed) {
      content_settings->OnContentAllowed(content_settings_type());
    } else {
      content_settings->OnContentBlocked(content_settings_type());
    }
  }

  if (allowed) {
    GetGeolocationControl()->UserDidOptIntoLocationServices();
  }
}

device::mojom::GeolocationControl*
GeolocationPermissionContext::GetGeolocationControl() {
  DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
  if (!geolocation_control_) {
    content::GetDeviceService().BindGeolocationControl(
        geolocation_control_.BindNewPipeAndPassReceiver());
  }
  return geolocation_control_.get();
}

}  // namespace permissions