/
gateway_antenna_store.go
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/
gateway_antenna_store.go
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// Copyright © 2022 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"
"sort"
"github.com/uptrace/bun"
"go.thethings.network/lorawan-stack/v3/pkg/ttnpb"
storeutil "go.thethings.network/lorawan-stack/v3/pkg/util/store"
)
// GatewayAntenna is the gateway antenna model in the database.
type GatewayAntenna struct {
bun.BaseModel `bun:"table:gateway_antennas,alias:ant"`
Model
GatewayID string `bun:"gateway_id,notnull"`
Gateway *Gateway `bun:"rel:belongs-to,join:gateway_id=id"`
Index int `bun:"index,notnull"`
Gain float32 `bun:"gain,nullzero"`
Location
Placement int `bun:"placement,nullzero"`
}
func gatewayAntennaFromPB(pb *ttnpb.GatewayAntenna) *GatewayAntenna {
return &GatewayAntenna{
Gain: pb.Gain,
Location: locationFromPB(pb.Location),
Placement: int(pb.Placement),
}
}
func gatewayAntennaToPB(m *GatewayAntenna) *ttnpb.GatewayAntenna {
if m == nil {
return nil
}
pb := &ttnpb.GatewayAntenna{
Gain: m.Gain,
Location: locationToPB(m.Location),
Placement: ttnpb.GatewayAntennaPlacement(m.Placement),
}
return pb
}
// GatewayAntennaSlice is a slice of GatewayAntenna.
type GatewayAntennaSlice []*GatewayAntenna
func (a GatewayAntennaSlice) Len() int { return len(a) }
func (a GatewayAntennaSlice) Swap(i, j int) { a[i], a[j] = a[j], a[i] }
func (a GatewayAntennaSlice) Less(i, j int) bool {
return a[i].Index < a[j].Index
}
func gatewayAntennaSliceFromPB(pbs []*ttnpb.GatewayAntenna, gatewayID string) []*GatewayAntenna {
out := make([]*GatewayAntenna, len(pbs))
for i, pb := range pbs {
out[i] = gatewayAntennaFromPB(pb)
out[i].GatewayID = gatewayID
out[i].Index = i
}
return out
}
func gatewayAntennaMap(models []*GatewayAntenna) map[int]*GatewayAntenna {
m := make(map[int]*GatewayAntenna, len(models))
for _, model := range models {
m[model.Index] = model
}
return m
}
func (s *gatewayStore) replaceGatewayAntennas(
ctx context.Context, current []*GatewayAntenna, desired []*ttnpb.GatewayAntenna, gatewayID string,
) ([]*GatewayAntenna, error) {
var (
oldMap = gatewayAntennaMap(current)
newMap = gatewayAntennaMap(gatewayAntennaSliceFromPB(desired, gatewayID))
toCreate = make([]*GatewayAntenna, 0, len(newMap))
toUpdate = make([]*GatewayAntenna, 0, len(newMap))
toDelete = make([]*GatewayAntenna, 0, len(oldMap))
result = make(GatewayAntennaSlice, 0, len(newMap))
)
for k, v := range newMap {
// Ignore gateway antenna that has not been updated.
if current, ok := oldMap[k]; ok {
delete(oldMap, k) // Don't need to delete this one.
delete(newMap, k) // Don't need to create this one.
if current.Gain == v.Gain && current.Location == v.Location && current.Placement == v.Placement {
result = append(result, v)
continue // Don't need to update this one.
}
v.ID = current.ID
toUpdate = append(toUpdate, v)
result = append(result, v)
continue
}
toCreate = append(toCreate, v)
result = append(result, v)
}
for _, v := range oldMap {
toDelete = append(toDelete, v)
}
if len(toDelete) > 0 {
_, err := s.DB.NewDelete().
Model(&toDelete).
WherePK().
Exec(ctx)
if err != nil {
return nil, storeutil.WrapDriverError(err)
}
}
if len(toUpdate) > 0 {
_, err := s.DB.NewUpdate().
Model(&toUpdate).
Column("gain", "latitude", "longitude", "altitude", "accuracy", "placement"). // TODO: Add attributes.
Bulk().
Exec(ctx)
if err != nil {
return nil, storeutil.WrapDriverError(err)
}
}
if len(toCreate) > 0 {
_, err := s.DB.NewInsert().
Model(&toCreate).
Exec(ctx)
if err != nil {
return nil, storeutil.WrapDriverError(err)
}
}
sort.Sort(result)
return result, nil
}