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desktops.go
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desktops.go
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/*
* Teleport
* Copyright (C) 2023 Gravitational, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package local
import (
"context"
"github.com/gravitational/trace"
"github.com/gravitational/teleport/api/types"
"github.com/gravitational/teleport/lib/backend"
"github.com/gravitational/teleport/lib/services"
)
// WindowsDesktopService manages windows desktop resources in the backend.
type WindowsDesktopService struct {
backend.Backend
}
// NewWindowsDesktopService creates a new WindowsDesktopsService.
func NewWindowsDesktopService(backend backend.Backend) *WindowsDesktopService {
return &WindowsDesktopService{Backend: backend}
}
// GetWindowsDesktops returns all Windows desktops matching filter.
func (s *WindowsDesktopService) GetWindowsDesktops(ctx context.Context, filter types.WindowsDesktopFilter) ([]types.WindowsDesktop, error) {
startKey := backend.ExactKey(windowsDesktopsPrefix)
result, err := s.GetRange(ctx, startKey, backend.RangeEnd(startKey), backend.NoLimit)
if err != nil {
return nil, trace.Wrap(err)
}
var desktops []types.WindowsDesktop
for _, item := range result.Items {
desktop, err := services.UnmarshalWindowsDesktop(item.Value,
services.WithResourceID(item.ID), services.WithExpires(item.Expires), services.WithRevision(item.Revision))
if err != nil {
return nil, trace.Wrap(err)
}
if !filter.Match(desktop) {
continue
}
desktops = append(desktops, desktop)
}
// If both HostID and Name are set in the filter only one desktop should be expected
if filter.HostID != "" && filter.Name != "" && len(desktops) == 0 {
return nil, trace.NotFound("windows desktop \"%s/%s\" doesn't exist", filter.HostID, filter.Name)
}
return desktops, nil
}
// CreateWindowsDesktop creates a windows desktop resource.
func (s *WindowsDesktopService) CreateWindowsDesktop(ctx context.Context, desktop types.WindowsDesktop) error {
if err := services.CheckAndSetDefaults(desktop); err != nil {
return trace.Wrap(err)
}
value, err := services.MarshalWindowsDesktop(desktop)
if err != nil {
return trace.Wrap(err)
}
item := backend.Item{
Key: backend.Key(windowsDesktopsPrefix, desktop.GetHostID(), desktop.GetName()),
Value: value,
Expires: desktop.Expiry(),
ID: desktop.GetResourceID(),
}
_, err = s.Create(ctx, item)
if err != nil {
return trace.Wrap(err)
}
return nil
}
// UpdateWindowsDesktop updates a windows desktop resource.
func (s *WindowsDesktopService) UpdateWindowsDesktop(ctx context.Context, desktop types.WindowsDesktop) error {
if err := services.CheckAndSetDefaults(desktop); err != nil {
return trace.Wrap(err)
}
rev := desktop.GetRevision()
value, err := services.MarshalWindowsDesktop(desktop)
if err != nil {
return trace.Wrap(err)
}
item := backend.Item{
Key: backend.Key(windowsDesktopsPrefix, desktop.GetHostID(), desktop.GetName()),
Value: value,
Expires: desktop.Expiry(),
ID: desktop.GetResourceID(),
Revision: rev,
}
_, err = s.Update(ctx, item)
if err != nil {
return trace.Wrap(err)
}
return nil
}
// UpsertWindowsDesktop updates a windows desktop resource, creating it if it doesn't exist.
func (s *WindowsDesktopService) UpsertWindowsDesktop(ctx context.Context, desktop types.WindowsDesktop) error {
if err := services.CheckAndSetDefaults(desktop); err != nil {
return trace.Wrap(err)
}
rev := desktop.GetRevision()
value, err := services.MarshalWindowsDesktop(desktop)
if err != nil {
return trace.Wrap(err)
}
item := backend.Item{
Key: backend.Key(windowsDesktopsPrefix, desktop.GetHostID(), desktop.GetName()),
Value: value,
Expires: desktop.Expiry(),
ID: desktop.GetResourceID(),
Revision: rev,
}
_, err = s.Put(ctx, item)
if err != nil {
return trace.Wrap(err)
}
return nil
}
// DeleteWindowsDesktop removes the specified windows desktop resource.
func (s *WindowsDesktopService) DeleteWindowsDesktop(ctx context.Context, hostID, name string) error {
if name == "" {
return trace.Errorf("name must not be empty")
}
key := backend.Key(windowsDesktopsPrefix, hostID, name)
err := s.Delete(ctx, key)
if err != nil {
if trace.IsNotFound(err) {
return trace.NotFound("windows desktop \"%s/%s\" doesn't exist", hostID, name)
}
return trace.Wrap(err)
}
return nil
}
// DeleteAllWindowsDesktops removes all windows desktop resources.
func (s *WindowsDesktopService) DeleteAllWindowsDesktops(ctx context.Context) error {
startKey := backend.ExactKey(windowsDesktopsPrefix)
err := s.DeleteRange(ctx, startKey, backend.RangeEnd(startKey))
if err != nil {
return trace.Wrap(err)
}
return nil
}
// ListWindowsDesktops returns all Windows desktops matching filter.
func (s *WindowsDesktopService) ListWindowsDesktops(ctx context.Context, req types.ListWindowsDesktopsRequest) (*types.ListWindowsDesktopsResponse, error) {
reqLimit := req.Limit
if reqLimit <= 0 {
return nil, trace.BadParameter("nonpositive parameter limit")
}
rangeStart := backend.Key(windowsDesktopsPrefix, req.StartKey)
rangeEnd := backend.RangeEnd(backend.ExactKey(windowsDesktopsPrefix))
filter := services.MatchResourceFilter{
ResourceKind: types.KindWindowsDesktop,
Labels: req.Labels,
SearchKeywords: req.SearchKeywords,
PredicateExpression: req.PredicateExpression,
}
// Get most limit+1 results to determine if there will be a next key.
maxLimit := reqLimit + 1
var desktops []types.WindowsDesktop
if err := backend.IterateRange(ctx, s.Backend, rangeStart, rangeEnd, maxLimit, func(items []backend.Item) (stop bool, err error) {
for _, item := range items {
if len(desktops) == maxLimit {
break
}
desktop, err := services.UnmarshalWindowsDesktop(item.Value,
services.WithResourceID(item.ID), services.WithExpires(item.Expires), services.WithRevision(item.Revision))
if err != nil {
return false, trace.Wrap(err)
}
if !req.WindowsDesktopFilter.Match(desktop) {
continue
}
switch match, err := services.MatchResourceByFilters(desktop, filter, nil /* ignore dup matches */); {
case err != nil:
return false, trace.Wrap(err)
case match:
desktops = append(desktops, desktop)
}
}
return len(desktops) == maxLimit, nil
}); err != nil {
return nil, trace.Wrap(err)
}
// If both HostID and Name are set in the filter only one desktop should be expected
if req.HostID != "" && req.Name != "" && len(desktops) == 0 {
return nil, trace.NotFound("windows desktop \"%s/%s\" doesn't exist", req.HostID, req.Name)
}
var nextKey string
if len(desktops) > reqLimit {
nextKey = backend.GetPaginationKey(desktops[len(desktops)-1])
// Truncate the last item that was used to determine next row existence.
desktops = desktops[:reqLimit]
}
return &types.ListWindowsDesktopsResponse{
Desktops: desktops,
NextKey: nextKey,
}, nil
}
func (s *WindowsDesktopService) ListWindowsDesktopServices(ctx context.Context, req types.ListWindowsDesktopServicesRequest) (*types.ListWindowsDesktopServicesResponse, error) {
reqLimit := req.Limit
if reqLimit <= 0 {
return nil, trace.BadParameter("nonpositive parameter limit")
}
rangeStart := backend.Key(windowsDesktopServicesPrefix, req.StartKey)
rangeEnd := backend.RangeEnd(backend.ExactKey(windowsDesktopServicesPrefix))
filter := services.MatchResourceFilter{
ResourceKind: types.KindWindowsDesktopService,
Labels: req.Labels,
SearchKeywords: req.SearchKeywords,
PredicateExpression: req.PredicateExpression,
}
// Get most limit+1 results to determine if there will be a next key.
maxLimit := reqLimit + 1
var desktopServices []types.WindowsDesktopService
if err := backend.IterateRange(ctx, s.Backend, rangeStart, rangeEnd, maxLimit, func(items []backend.Item) (stop bool, err error) {
for _, item := range items {
if len(desktopServices) == maxLimit {
break
}
desktop, err := services.UnmarshalWindowsDesktopService(item.Value,
services.WithResourceID(item.ID), services.WithExpires(item.Expires), services.WithRevision(item.Revision))
if err != nil {
return false, trace.Wrap(err)
}
switch match, err := services.MatchResourceByFilters(desktop, filter, nil /* ignore dup matches */); {
case err != nil:
return false, trace.Wrap(err)
case match:
desktopServices = append(desktopServices, desktop)
}
}
return len(desktopServices) == maxLimit, nil
}); err != nil {
return nil, trace.Wrap(err)
}
var nextKey string
if len(desktopServices) > reqLimit {
nextKey = backend.GetPaginationKey(desktopServices[len(desktopServices)-1])
// Truncate the last item that was used to determine next row existence.
desktopServices = desktopServices[:reqLimit]
}
return &types.ListWindowsDesktopServicesResponse{
DesktopServices: desktopServices,
NextKey: nextKey,
}, nil
}
const (
windowsDesktopsPrefix = "windowsDesktop"
)