[management] network map from nmap data type (#6919)

Signed-off-by: Dmitri Dolguikh <dmitri.external@netbird.io>
Co-authored-by: Dmitri Dolguikh <dmitri.external@netbird.io>

shared/management/networkmap/decode_test.go

@@ -0,0 +1,61 @@
+package networkmap
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	protobuf "google.golang.org/protobuf/proto"
+
+	"github.com/netbirdio/netbird/shared/management/networkmap/nmdata"
+	"github.com/netbirdio/netbird/shared/management/proto"
+)
+
+func TestDecodePolicy(t *testing.T) {
+	assert.Equal(t,
+		nmdata.Resource{Type: "peer", ID: "valid-id"},
+		resourceFromProto(
+			&proto.ResourceCompact{Type: "peer", PeerIndexSet: true, PeerIndex: uint32(1)},
+			[]string{"invalid-id-0", "valid-id", "invalid-id-2"}))
+	// check invalid peer index returns an empty resource
+	assert.Equal(t,
+		nmdata.Resource{},
+		resourceFromProto(
+			&proto.ResourceCompact{Type: "peer", PeerIndexSet: true, PeerIndex: uint32(100)},
+			[]string{"invalid-id-0", "valid-id", "invalid-id-2"}))
+	assert.Equal(t,
+		nmdata.Resource{Type: "domain", ID: "domain"},
+		resourceFromProto(
+			&proto.ResourceCompact{Type: "domain", Id: "domain"}, []string{}))
+	assert.Equal(t,
+		nmdata.Resource{Type: "host", ID: "host"},
+		resourceFromProto(
+			&proto.ResourceCompact{Type: "host", Id: "host"}, []string{}))
+	assert.Equal(t,
+		nmdata.Resource{Type: "subnet", ID: "subnet"},
+		resourceFromProto(
+			&proto.ResourceCompact{Type: "subnet", Id: "subnet"}, []string{}))
+	// an unknown resource type return an empty resource
+	assert.Equal(t,
+		nmdata.Resource{},
+		resourceFromProto(
+			&proto.ResourceCompact{Type: "boom", Id: "boom"}, []string{}))
+}
+
+// ResourceCompact fields 1-3 are the v0.77 wire contract. Retyping any of them
+// makes peers on either side of the change silently drop policy resources, so
+// the encoding is pinned here as raw bytes: field 1 "peer" (bytes), field 2
+// true (varint), field 3 7 (varint).
+func TestResourceCompactLegacyWireFormat(t *testing.T) {
+	legacy := []byte{0x0a, 0x04, 'p', 'e', 'e', 'r', 0x10, 0x01, 0x18, 0x07}
+
+	var decoded proto.ResourceCompact
+	require.NoError(t, protobuf.Unmarshal(legacy, &decoded))
+	assert.Equal(t, "peer", decoded.Type)
+	assert.True(t, decoded.PeerIndexSet)
+	assert.Equal(t, uint32(7), decoded.PeerIndex)
+
+	encoded, err := protobuf.Marshal(&proto.ResourceCompact{Type: "peer", PeerIndexSet: true, PeerIndex: 7})
+	require.NoError(t, err)
+	assert.Equal(t, legacy, encoded)
+}