/
abstract.go
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/
abstract.go
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// Copyright © 2021 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 api
import (
"encoding/json"
"strings"
"go.thethings.network/lorawan-stack/v3/pkg/ttnpb"
)
// AbstractLocationSolverResult provides a unified interface to the location solver results.
type AbstractLocationSolverResult interface {
Location() *ttnpb.Location
Algorithm() string
}
// AbstractLocationSolverResponse provides a unified interface to the location solver responses.
type AbstractLocationSolverResponse interface {
Result() AbstractLocationSolverResult
Errors() []string
Warnings() []string
Raw() *json.RawMessage
}
type abstractLocationSolverResult struct {
location *ttnpb.Location
algorithm string
}
// Location implements AbstractLocationSolverResult.
func (r abstractLocationSolverResult) Location() *ttnpb.Location {
return r.location
}
// Algorithm implements AbstractLocationSolverResult.
func (r abstractLocationSolverResult) Algorithm() string {
return r.algorithm
}
type abstractLocationSolverResponse struct {
result AbstractLocationSolverResult
errors []string
warnings []string
raw *json.RawMessage
}
// Result implements AbstractLocationSolverResponse.
func (r abstractLocationSolverResponse) Result() AbstractLocationSolverResult { return r.result }
// Errors implements AbstractLocationSolverResponse.
func (r abstractLocationSolverResponse) Errors() []string { return r.errors[:] }
// Warnings implements AbstractLocationSolverResponse.
func (r abstractLocationSolverResponse) Warnings() []string { return r.warnings[:] }
// Raw implements AbstractLocationSolverResponse.
func (r abstractLocationSolverResponse) Raw() *json.RawMessage { return r.raw }
func (r *LocationSolverResult) abstractResult() AbstractLocationSolverResult {
if r == nil {
return nil
}
source := ttnpb.LocationSource_SOURCE_UNKNOWN
switch r.Algorithm {
case Algorithm_RSSI:
source = ttnpb.LocationSource_SOURCE_LORA_RSSI_GEOLOCATION
case Algorithm_TDOA, Algorithm_RSSITDOA:
source = ttnpb.LocationSource_SOURCE_LORA_TDOA_GEOLOCATION
}
return &abstractLocationSolverResult{
algorithm: strings.ToLower(r.Algorithm),
location: &ttnpb.Location{
Latitude: r.Location.Latitude,
Longitude: r.Location.Longitude,
Accuracy: int32(r.Location.Tolerance),
Source: source,
},
}
}
// AbstractResponse converts the location solver response to the abstract location response format.
func (r ExtendedLocationSolverResponse) AbstractResponse() AbstractLocationSolverResponse {
return abstractLocationSolverResponse{
result: r.Result.abstractResult(),
errors: r.Errors[:],
warnings: r.Warnings[:],
raw: r.Raw,
}
}
func (r *GNSSLocationSolverResult) abstractResult() AbstractLocationSolverResult {
if r == nil || len(r.LLH) != 3 {
return nil
}
return &abstractLocationSolverResult{
algorithm: "gnss",
location: &ttnpb.Location{
Latitude: r.LLH[0],
Longitude: r.LLH[1],
Altitude: int32(r.LLH[2]),
Accuracy: int32(r.Accuracy),
Source: ttnpb.LocationSource_SOURCE_GPS,
},
}
}
// AbstractResponse converts the GNSS location solver response to the abstract location response format.
func (r *ExtendedGNSSLocationSolverResponse) AbstractResponse() AbstractLocationSolverResponse {
return abstractLocationSolverResponse{
result: r.Result.abstractResult(),
errors: r.Errors[:],
warnings: r.Warnings[:],
raw: r.Raw,
}
}
func (r *WiFiLocationSolverResult) abstractResult() AbstractLocationSolverResult {
if r == nil {
return nil
}
return &abstractLocationSolverResult{
algorithm: strings.ToLower(r.Algorithm),
location: &ttnpb.Location{
Latitude: r.Latitude,
Longitude: r.Longitude,
Altitude: int32(r.Altitude),
Accuracy: int32(r.Accuracy),
Source: ttnpb.LocationSource_SOURCE_WIFI_RSSI_GEOLOCATION,
},
}
}
// AbstractResponse converts the WiFi location solver response to the abstract location response format.
func (r *ExtendedWiFiLocationSolverResponse) AbstractResponse() abstractLocationSolverResponse {
return abstractLocationSolverResponse{
result: r.Result.abstractResult(),
errors: r.Errors[:],
warnings: r.Warnings[:],
raw: r.Raw,
}
}