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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| /* | ||
| Package osrm provides functions over the Open Source Routing Machine project. | ||
| We use OSRM's Table service when we want to quickly determine the duration | ||
| and/or distance between two points (without traffic awareness). | ||
| This could be useful for saving money/requests to Google Maps API every time an | ||
| anonymous end user sees an estimate quote for a potential trip. | ||
| https://github.com/Project-OSRM/osrm-backend/blob/master/docs/http.md#table-service | ||
| */ | ||
| package osrm |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| package osrm | ||
|
|
||
| import ( | ||
| "context" | ||
| "errors" | ||
| "fmt" | ||
| osrm "github.com/gojuno/go.osrm" | ||
| "github.com/grpc-ecosystem/go-grpc-middleware/logging/zap/ctxzap" | ||
| "github.com/kevinmichaelchen/api-dispatch/internal/idl/coop/drivers/dispatch/v1beta1" | ||
| geo "github.com/paulmach/go.geo" | ||
| "go.uber.org/zap" | ||
| "time" | ||
| ) | ||
|
|
||
| var ( | ||
| errFailedRequest = errors.New("failed OSRM request") | ||
| ) | ||
|
|
||
| type CalculateOutput struct { | ||
| Duration time.Duration | ||
| DistanceMeters int | ||
| } | ||
|
|
||
| func Calculate(ctx context.Context, a, b *v1beta1.LatLng) (*CalculateOutput, error) { | ||
| logger := ctxzap.Extract(ctx) | ||
|
|
||
| client := osrm.NewFromURL("https://router.project-osrm.org") | ||
|
|
||
| res, err := client.Table(ctx, osrm.TableRequest{ | ||
| Profile: "car", | ||
| Coordinates: osrm.NewGeometryFromPointSet(geo.PointSet{ | ||
| {a.GetLongitude(), a.GetLatitude()}, | ||
| {b.GetLongitude(), b.GetLatitude()}, | ||
| }), | ||
| Sources: []int{0}, | ||
| Destinations: []int{1}, | ||
| }) | ||
|
|
||
| if err != nil { | ||
| return nil, fmt.Errorf("failed OSRM request: %w", err) | ||
| } | ||
|
|
||
| if res.Code != "Ok" { | ||
| logger.Error("received non-ok OSRM response", | ||
| zap.String("error.code", res.Code), | ||
| zap.String("error.msg", res.Message), | ||
| ) | ||
| return nil, errFailedRequest | ||
| } | ||
|
|
||
| return &CalculateOutput{ | ||
| Duration: time.Duration(res.Durations[0][0]) * time.Second, | ||
| DistanceMeters: 0, | ||
| }, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| package osrm | ||
|
|
||
| import ( | ||
| "context" | ||
| "github.com/grpc-ecosystem/go-grpc-middleware/logging/zap/ctxzap" | ||
| "github.com/kevinmichaelchen/api-dispatch/internal/idl/coop/drivers/dispatch/v1beta1" | ||
| "github.com/stretchr/testify/require" | ||
| "go.uber.org/zap/zaptest" | ||
| "testing" | ||
| "time" | ||
| ) | ||
|
|
||
| func TestCalculate(t *testing.T) { | ||
| a := &v1beta1.LatLng{ | ||
| Latitude: 40.791680675548136, | ||
| Longitude: -73.9650115649754, | ||
| } | ||
| b := &v1beta1.LatLng{ | ||
| Latitude: 40.76866089218841, | ||
| Longitude: -73.98145413365043, | ||
| } | ||
|
|
||
| ctx := ctxzap.ToContext(context.Background(), zaptest.NewLogger(t)) | ||
| res, err := Calculate(ctx, a, b) | ||
| require.NoError(t, err) | ||
| require.Greater(t, res.Duration, time.Duration(0)) | ||
| } |