- write node location info on a file while registering

- add location endpoint to get this file info

pkg/geoip/geoip.go

@@ -9,6 +9,10 @@ import (
 	"github.com/rs/zerolog/log"
 )
 
+const (
+	LocationFile = "/tmp/location"
+)
+
 // Location holds the result of a geoip request
 type Location struct {
 	Longitude   float64 `json:"longitude"`

pkg/registrar/register.go

@@ -3,8 +3,10 @@ package registrar
 import (
 	"context"
 	"crypto/ed25519"
+	"encoding/json"
 	"fmt"
 	"net"
+	"os"
 	"time"
 
 	"github.com/centrifuge/go-substrate-rpc-client/v4/types"
@@ -144,6 +146,10 @@ func registerNode(
 		City:      info.Location.City,
 	}
 
+	if err := writeLocationOnFile(info.Location, geoip.LocationFile); err != nil {
+		return 0, 0, errors.Wrap(err, "failed to set location on disk")
+	}
+
 	log.Info().Str("id", mgr.NodeID(ctx).Identity()).Msg("start registration of the node")
 	log.Info().Msg("registering node on blockchain")
 
@@ -231,3 +237,13 @@ func ensureTwin(ctx context.Context, substrateGateway *stubs.SubstrateGatewayStu
 
 	return twinID, nil
 }
+
+func writeLocationOnFile(loc geoip.Location, filepath string) error {
+	file, err := os.OpenFile(filepath, os.O_RDWR|os.O_CREATE, 0644)
+	if err != nil {
+		return errors.Wrap(err, "failed to open location file")
+	}
+	defer file.Close()
+
+	return json.NewEncoder(file).Encode(loc)
+}

pkg/zos_api/location.go

@@ -0,0 +1,26 @@
+package zosapi
+
+import (
+	"context"
+	"encoding/json"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/threefoldtech/zos/pkg/geoip"
+)
+
+func (g *ZosAPI) locationGet(ctx context.Context, payload []byte) (interface{}, error) {
+	if _, err := os.Stat(geoip.LocationFile); err != nil {
+		return nil, errors.Wrap(err, "couldn't found a location info")
+	}
+
+	f, err := os.Open(geoip.LocationFile)
+	if err != nil {
+		return nil, errors.Wrap(err, "couldn't get the location info")
+	}
+	defer f.Close()
+
+	var loc geoip.Location
+	err = json.NewDecoder(f).Decode(&loc)
+	return loc, err
+}

pkg/zos_api/routes.go

@@ -48,4 +48,7 @@ func (g *ZosAPI) SetupRoutes(router *peer.Router) {
 	admin.WithHandler("interfaces", g.adminInterfacesHandler)
 	admin.WithHandler("set_public_nic", g.adminSetPublicNICHandler)
 	admin.WithHandler("get_public_nic", g.adminGetPublicNICHandler)
+
+	location := root.SubRoute("location")
+	location.WithHandler("get", g.locationGet)
 }