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client_store.go
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client_store.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package store
import (
"context"
"fmt"
"reflect"
"runtime/trace"
"strings"
"github.com/gogo/protobuf/types"
"github.com/jinzhu/gorm"
"go.thethings.network/lorawan-stack/v3/pkg/rpcmiddleware/warning"
"go.thethings.network/lorawan-stack/v3/pkg/ttnpb"
)
// GetClientStore returns an ClientStore on the given db (or transaction).
func GetClientStore(db *gorm.DB) ClientStore {
return &clientStore{store: newStore(db)}
}
type clientStore struct {
*store
}
// selectClientFields selects relevant fields (based on fieldMask) and preloads details if needed.
func selectClientFields(ctx context.Context, query *gorm.DB, fieldMask *types.FieldMask) *gorm.DB {
if fieldMask == nil || len(fieldMask.Paths) == 0 {
return query.Preload("Attributes")
}
var clientColumns []string
var notFoundPaths []string
for _, path := range ttnpb.TopLevelFields(fieldMask.Paths) {
switch path {
case "ids", "created_at", "updated_at":
// always selected
case attributesField:
query = query.Preload("Attributes")
default:
if columns, ok := clientColumnNames[path]; ok {
clientColumns = append(clientColumns, columns...)
} else {
notFoundPaths = append(notFoundPaths, path)
}
}
}
if len(notFoundPaths) > 0 {
warning.Add(ctx, fmt.Sprintf("unsupported field mask paths: %s", strings.Join(notFoundPaths, ", ")))
}
return query.Select(cleanFields(append(append(modelColumns, "client_id"), clientColumns...)...))
}
func (s *clientStore) CreateClient(ctx context.Context, cli *ttnpb.Client) (*ttnpb.Client, error) {
defer trace.StartRegion(ctx, "create client").End()
cliModel := Client{
ClientID: cli.ClientID, // The ID is not mutated by fromPB.
}
cliModel.fromPB(cli, nil)
if err := s.createEntity(ctx, &cliModel); err != nil {
return nil, err
}
var cliProto ttnpb.Client
cliModel.toPB(&cliProto, nil)
return &cliProto, nil
}
func (s *clientStore) FindClients(ctx context.Context, ids []*ttnpb.ClientIdentifiers, fieldMask *types.FieldMask) ([]*ttnpb.Client, error) {
defer trace.StartRegion(ctx, "find clients").End()
idStrings := make([]string, len(ids))
for i, id := range ids {
idStrings[i] = id.GetClientID()
}
query := s.query(ctx, Client{}, withClientID(idStrings...))
query = selectClientFields(ctx, query, fieldMask)
query = query.Order(orderFromContext(ctx, "clients", "client_id", "ASC"))
if limit, offset := limitAndOffsetFromContext(ctx); limit != 0 {
countTotal(ctx, query.Model(Client{}))
query = query.Limit(limit).Offset(offset)
}
var cliModels []Client
query = query.Find(&cliModels)
setTotal(ctx, uint64(len(cliModels)))
if query.Error != nil {
return nil, query.Error
}
cliProtos := make([]*ttnpb.Client, len(cliModels))
for i, cliModel := range cliModels {
cliProto := &ttnpb.Client{}
cliModel.toPB(cliProto, fieldMask)
cliProtos[i] = cliProto
}
return cliProtos, nil
}
func (s *clientStore) GetClient(ctx context.Context, id *ttnpb.ClientIdentifiers, fieldMask *types.FieldMask) (*ttnpb.Client, error) {
defer trace.StartRegion(ctx, "get client").End()
query := s.query(ctx, Client{}, withClientID(id.GetClientID()))
query = selectClientFields(ctx, query, fieldMask)
var cliModel Client
if err := query.First(&cliModel).Error; err != nil {
if gorm.IsRecordNotFoundError(err) {
return nil, errNotFoundForID(id)
}
return nil, err
}
cliProto := &ttnpb.Client{}
cliModel.toPB(cliProto, fieldMask)
return cliProto, nil
}
func (s *clientStore) UpdateClient(ctx context.Context, cli *ttnpb.Client, fieldMask *types.FieldMask) (updated *ttnpb.Client, err error) {
defer trace.StartRegion(ctx, "update client").End()
query := s.query(ctx, Client{}, withClientID(cli.GetClientID()))
query = selectClientFields(ctx, query, fieldMask)
var cliModel Client
if err = query.First(&cliModel).Error; err != nil {
if gorm.IsRecordNotFoundError(err) {
return nil, errNotFoundForID(cli.ClientIdentifiers)
}
return nil, err
}
if err := ctx.Err(); err != nil { // Early exit if context canceled
return nil, err
}
oldAttributes := cliModel.Attributes
columns := cliModel.fromPB(cli, fieldMask)
if err = s.updateEntity(ctx, &cliModel, columns...); err != nil {
return nil, err
}
if !reflect.DeepEqual(oldAttributes, cliModel.Attributes) {
if err = s.replaceAttributes(ctx, "client", cliModel.ID, oldAttributes, cliModel.Attributes); err != nil {
return nil, err
}
}
updated = &ttnpb.Client{}
cliModel.toPB(updated, fieldMask)
return updated, nil
}
func (s *clientStore) DeleteClient(ctx context.Context, id *ttnpb.ClientIdentifiers) error {
defer trace.StartRegion(ctx, "delete client").End()
return s.deleteEntity(ctx, id)
}