Update README.md

Assorted gameplay improvements from play testing

Makefile

@@ -18,12 +18,9 @@ gen:
 	protoc --proto_path proto --go_out=plugins=grpc,paths=source_relative:proto/ proto/roveapi/roveapi.proto
 
 test:
-	@echo Unit tests
-	go test -v ./...
-
-	@echo Integration tests
-	docker-compose up --build --exit-code-from=rove-tests --abort-on-container-exit rove-tests
-	docker-compose down
+	@echo Run unit and integration tests
+	docker-compose -f docker-compose-test.yml up --build --exit-code-from=rove-tests --abort-on-container-exit rove-tests
+	docker-compose -f docker-compose-test.yml down
 	go tool cover -html=/tmp/coverage-data/c.out -o /tmp/coverage.html
 	
 	@echo Done, coverage data can be found in /tmp/coverage.html

README.md

@@ -1,9 +1,8 @@
 Rove
 ====
-![Tests](https://github.com/mdiluz/rove/workflows/Tests/badge.svg) ![Docker](https://github.com/mdiluz/rove/workflows/Docker/badge.svg) [![rove](https://snapcraft.io//rove/badge.svg)](https://snapcraft.io/rove)
 
-![Rove](https://github.com/mdiluz/rove/blob/master/data/icon.svg)
+![Rove](data/icon.svg)
 
 Rove is an asynchronous nomadic game about exploring as part of a loose community.
 
-This repository contains the source code for the `rove-server` deployment and the `rove` command line client. See [mdiluz.github.io/rove](https://mdiluz.github.io/rove/) for game details, and [roveapi.proto](https://github.com/mdiluz/rove/blob/master/proto/roveapi/roveapi.proto) for the current server-client API.
+This repository contains the source code for the `rove-server` deployment and the `rove` command line client. See [mdiluz.github.io/rove](https://mdiluz.github.io/rove/) for game details, and [roveapi.proto](proto/roveapi/roveapi.proto) for the current server-client API.

cmd/rove-server/internal/routes.go

@@ -34,7 +34,7 @@ func (s *Server) Register(ctx context.Context, req *roveapi.RegisterRequest) (*r
 		return nil, fmt.Errorf("empty account name")
 	}
 
-	if acc, err := s.accountant.RegisterAccount(req.Name); err != nil {
+	if acc, err := s.world.Accountant.RegisterAccount(req.Name); err != nil {
 		return nil, err
 
 	} else if _, err := s.SpawnRoverForAccount(req.Name); err != nil {
@@ -57,13 +57,13 @@ func (s *Server) Register(ctx context.Context, req *roveapi.RegisterRequest) (*r
 func (s *Server) Status(ctx context.Context, req *roveapi.StatusRequest) (response *roveapi.StatusResponse, err error) {
 	log.Printf("Handling status request: %s\n", req.Account.Name)
 
-	if valid, err := s.accountant.VerifySecret(req.Account.Name, req.Account.Secret); err != nil {
+	if valid, err := s.world.Accountant.VerifySecret(req.Account.Name, req.Account.Secret); err != nil {
 		return nil, err
 
 	} else if !valid {
 		return nil, fmt.Errorf("Secret incorrect for account %s", req.Account.Name)
 
-	} else if resp, err := s.accountant.GetValue(req.Account.Name, "rover"); err != nil {
+	} else if resp, err := s.world.Accountant.GetValue(req.Account.Name, "rover"); err != nil {
 		return nil, err
 
 	} else if rover, err := s.world.GetRover(resp); err != nil {
@@ -117,7 +117,7 @@ func (s *Server) Status(ctx context.Context, req *roveapi.StatusRequest) (respon
 func (s *Server) Radar(ctx context.Context, req *roveapi.RadarRequest) (*roveapi.RadarResponse, error) {
 	log.Printf("Handling radar request: %s\n", req.Account.Name)
 
-	if valid, err := s.accountant.VerifySecret(req.Account.Name, req.Account.Secret); err != nil {
+	if valid, err := s.world.Accountant.VerifySecret(req.Account.Name, req.Account.Secret); err != nil {
 		return nil, err
 
 	} else if !valid {
@@ -126,7 +126,7 @@ func (s *Server) Radar(ctx context.Context, req *roveapi.RadarRequest) (*roveapi
 
 	response := &roveapi.RadarResponse{}
 
-	resp, err := s.accountant.GetValue(req.Account.Name, "rover")
+	resp, err := s.world.Accountant.GetValue(req.Account.Name, "rover")
 	if err != nil {
 		return nil, err
 
@@ -149,14 +149,14 @@ func (s *Server) Radar(ctx context.Context, req *roveapi.RadarRequest) (*roveapi
 func (s *Server) Command(ctx context.Context, req *roveapi.CommandRequest) (*roveapi.CommandResponse, error) {
 	log.Printf("Handling command request: %s and %+v\n", req.Account.Name, req.Commands)
 
-	if valid, err := s.accountant.VerifySecret(req.Account.Name, req.Account.Secret); err != nil {
+	if valid, err := s.world.Accountant.VerifySecret(req.Account.Name, req.Account.Secret); err != nil {
 		return nil, err
 
 	} else if !valid {
 		return nil, fmt.Errorf("Secret incorrect for account %s", req.Account.Name)
 	}
 
-	resp, err := s.accountant.GetValue(req.Account.Name, "rover")
+	resp, err := s.world.Accountant.GetValue(req.Account.Name, "rover")
 	if err != nil {
 		return nil, err
 	}

cmd/rove-server/internal/server.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 	"log"
 	"net"
+	"os"
+	"path"
 	"sync"
 
 	"github.com/mdiluz/rove/pkg/persistence"
@@ -11,8 +13,12 @@ import (
 	"github.com/mdiluz/rove/proto/roveapi"
 	"github.com/robfig/cron"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/reflection"
 )
 
+var cert = os.Getenv("CERT_NAME")
+
 const (
 	// PersistentData will allow the server to load and save it's state
 	PersistentData = iota
@@ -27,9 +33,6 @@ type Server struct {
 	// Internal state
 	world *rove.World
 
-	// Accountant
-	accountant Accountant
-
 	// gRPC server
 	netListener net.Listener
 	grpcServ    *grpc.Server
@@ -80,7 +83,6 @@ func NewServer(opts ...ServerOption) *Server {
 		persistence: EphemeralData,
 		schedule:    cron.New(),
 		world:       rove.NewWorld(32),
-		accountant:  NewSimpleAccountant(),
 	}
 
 	// Apply all options
@@ -107,8 +109,22 @@ func (s *Server) Initialise(fillWorld bool) (err error) {
 	if err != nil {
 		log.Fatalf("failed to listen: %v", err)
 	}
-	s.grpcServ = grpc.NewServer()
+
+	// Load TLS
+	var opts []grpc.ServerOption
+	if len(os.Getenv("NO_TLS")) == 0 {
+		pem := path.Join("/etc/letsencrypt/live/", cert, "fullchain.pem")
+		key := path.Join("/etc/letsencrypt/live/", cert, "privkey.pem")
+		creds, err := credentials.NewServerTLSFromFile(pem, key)
+		if err != nil {
+			log.Fatalf("failed to setup TLS: %v", err)
+		}
+		opts = append(opts, grpc.Creds(creds))
+	}
+
+	s.grpcServ = grpc.NewServer(opts...)
 	roveapi.RegisterRoveServer(s.grpcServ, s)
+	reflection.Register(s.grpcServ)
 
 	return nil
 }
@@ -188,7 +204,7 @@ func (s *Server) SaveWorld() error {
 	if s.persistence == PersistentData {
 		s.world.RLock()
 		defer s.world.RUnlock()
-		if err := persistence.SaveAll("world", s.world, "accounts", s.accountant); err != nil {
+		if err := persistence.SaveAll("world", s.world); err != nil {
 			return fmt.Errorf("failed to save out persistent data: %s", err)
 		}
 	}
@@ -200,7 +216,7 @@ func (s *Server) LoadWorld() error {
 	if s.persistence == PersistentData {
 		s.world.Lock()
 		defer s.world.Unlock()
-		if err := persistence.LoadAll("world", &s.world, "accounts", &s.accountant); err != nil {
+		if err := persistence.LoadAll("world", &s.world); err != nil {
 			return err
 		}
 	}
@@ -209,22 +225,10 @@ func (s *Server) LoadWorld() error {
 
 // SpawnRoverForAccount spawns the rover rover for an account
 func (s *Server) SpawnRoverForAccount(account string) (string, error) {
-	inst, err := s.world.SpawnRover()
+	inst, err := s.world.SpawnRover(account)
 	if err != nil {
 		return "", err
 	}
 
-	err = s.accountant.AssignData(account, "rover", inst)
-	if err != nil {
-		log.Printf("Failed to assign rover to account, %s", err)
-
-		// Try and clear up the rover
-		if err := s.world.DestroyRover(inst); err != nil {
-			log.Printf("Failed to destroy rover after failed rover assign: %s", err)
-		}
-
-		return "", err
-	}
-
 	return inst, nil
 }

cmd/rove-server/internal/server_test.go

@@ -1,6 +1,7 @@
 package internal
 
 import (
+	"os"
 	"testing"
 )
 
@@ -30,6 +31,7 @@ func TestNewServer_OptionPersistentData(t *testing.T) {
 }
 
 func TestServer_Run(t *testing.T) {
+	os.Setenv("NO_TLS", "1")
 	server := NewServer()
 	if server == nil {
 		t.Error("Failed to create server")
@@ -45,6 +47,7 @@ func TestServer_Run(t *testing.T) {
 }
 
 func TestServer_RunPersistentData(t *testing.T) {
+	os.Setenv("NO_TLS", "1")
 	server := NewServer(OptionPersistentData())
 	if server == nil {
 		t.Error("Failed to create server")

cmd/rove/internal/glyph.go

@@ -25,6 +25,9 @@ const (
 	// GlyphRoverDormant represents a dormant rover
 	GlyphRoverDormant = Glyph('r')
 
+	// GlyphRoverParts represents spare rover parts
+	GlyphRoverParts = Glyph('*')
+
 	// GlyphRockSmall is a small stashable rock
 	GlyphRockSmall = Glyph('o')
 
@@ -58,6 +61,8 @@ func ObjectGlyph(o roveapi.Object) Glyph {
 		return GlyphRoverDormant
 	case roveapi.Object_RockLarge:
 		return GlyphRockLarge
+	case roveapi.Object_RoverParts:
+		return GlyphRoverParts
 	}
 
 	log.Fatalf("Unknown object type: %c", o)

cmd/rove/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"crypto/tls"
 	"encoding/json"
 	"fmt"
 	"io/ioutil"
@@ -8,6 +9,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"strconv"
 	"time"
 
 	"github.com/mdiluz/rove/cmd/rove/internal"
@@ -15,6 +17,7 @@ import (
 	"github.com/mdiluz/rove/proto/roveapi"
 	"golang.org/x/net/context"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
 )
 
 var home = os.Getenv("HOME")
@@ -22,23 +25,30 @@ var defaultDataPath = path.Join(home, ".local/share/")
 
 // Command usage
 func printUsage() {
-	fmt.Fprintf(os.Stderr, "Usage: rove COMMAND [ARGS...]\n")
-	fmt.Fprintln(os.Stderr, "\nCommands")
-	fmt.Fprintln(os.Stderr, "\tserver-status              prints the server status")
-	fmt.Fprintln(os.Stderr, "\tregister NAME              registers an account and stores it (use with -name)")
-	fmt.Fprintln(os.Stderr, "\tcommand COMMAND [VAL...]   issue commands to rover, accepts multiple, see below")
-	fmt.Fprintln(os.Stderr, "\tradar                      gathers radar data for the current rover")
-	fmt.Fprintln(os.Stderr, "\tstatus                     gets status info for current rover")
-	fmt.Fprintln(os.Stderr, "\tconfig [HOST]              outputs the local config info, optionally sets host")
-	fmt.Fprintln(os.Stderr, "\thelp                       outputs this usage information")
-	fmt.Fprintln(os.Stderr, "\tversion                    outputs version info")
-	fmt.Fprintln(os.Stderr, "\nRover commands:")
-	fmt.Fprintln(os.Stderr, "\ttoggle                     toggles the sails, either catching the wind, or charging from the sun")
-	fmt.Fprintln(os.Stderr, "\tstash                      stores the object at the rover location in the inventory")
-	fmt.Fprintln(os.Stderr, "\trepair                     uses an inventory object to repair the rover")
-	fmt.Fprintln(os.Stderr, "\tbroadcast MSG              broadcast a simple ASCII triplet to nearby rovers")
-	fmt.Fprintln(os.Stderr, "\nEnvironment")
-	fmt.Fprintln(os.Stderr, "\tROVE_USER_DATA             path to user data, defaults to "+defaultDataPath)
+	fmt.Fprintln(os.Stderr, "Usage: rove ARG [OPT...]")
+	fmt.Fprintf(os.Stderr, "\n")
+	fmt.Fprintln(os.Stderr, "Arguments:")
+	fmt.Fprintln(os.Stderr, "\tversion                       outputs version")
+	fmt.Fprintln(os.Stderr, "\thelp                          outputs this usage text")
+	fmt.Fprintln(os.Stderr, "\tconfig [HOST]                 outputs the local config, optionally sets host")
+	fmt.Fprintln(os.Stderr, "\tserver-status                 prints the server status")
+	fmt.Fprintln(os.Stderr, "\tregister NAME                 registers an account and spawns a rover")
+	fmt.Fprintln(os.Stderr, "\tradar                         prints radar data in ASCII form")
+	fmt.Fprintln(os.Stderr, "\tstatus                        gets rover status")
+	fmt.Fprintln(os.Stderr, "\tcommand CMD [VAL...] [REPEAT] sets the command queue, accepts multiple in sequence")
+	fmt.Fprintf(os.Stderr, "\n")
+	fmt.Fprintln(os.Stderr, "Rover commands:")
+	fmt.Fprintln(os.Stderr, "\ttoggle         toggles the current sail mode")
+	fmt.Fprintln(os.Stderr, "\tstash          stores the object at the rover location in the inventory")
+	fmt.Fprintln(os.Stderr, "\trepair         repairs the rover using inventory item")
+	fmt.Fprintln(os.Stderr, "\tbroadcast MSG  broadcast a simple ASCII triplet to nearby rovers")
+	fmt.Fprintln(os.Stderr, "\tsalvage        salvages a dormant rover for parts")
+	fmt.Fprintln(os.Stderr, "\ttransfer       transfer's control into a dormant rover")
+	fmt.Fprintln(os.Stderr, "\tupgrade SPEC   spends rover parts to upgrade one rover spec (capacity, range, integrity, charge")
+	fmt.Fprintln(os.Stderr, "\twait           waits before performing the next command")
+	fmt.Fprintf(os.Stderr, "\n")
+	fmt.Fprintln(os.Stderr, "Environment")
+	fmt.Fprintln(os.Stderr, "\tROVE_USER_DATA        path to user data, defaults to "+defaultDataPath)
 }
 
 const gRPCport = 9090
@@ -178,8 +188,15 @@ func InnerMain(command string, args ...string) error {
 		return fmt.Errorf("no host set in %s, set one with '%s config {HOST}'", ConfigPath(), os.Args[0])
 	}
 
+	var opts []grpc.DialOption
+	if len(os.Getenv("NO_TLS")) == 0 {
+		opts = append(opts, grpc.WithTransportCredentials(credentials.NewTLS(&tls.Config{})))
+	} else {
+		opts = append(opts, grpc.WithInsecure())
+	}
+
 	// Set up the server
-	clientConn, err := grpc.Dial(fmt.Sprintf("%s:%d", config.Host, gRPCport), grpc.WithInsecure())
+	clientConn, err := grpc.Dial(fmt.Sprintf("%s:%d", config.Host, gRPCport), opts...)
 	if err != nil {
 		return err
 	}
@@ -231,6 +248,8 @@ func InnerMain(command string, args ...string) error {
 		// Iterate through each command
 		var commands []*roveapi.Command
 		for i := 0; i < len(args); i++ {
+
+			var cmd *roveapi.Command
 			switch args[i] {
 			case "turn":
 				i++
@@ -241,12 +260,10 @@ func InnerMain(command string, args ...string) error {
 				if b == roveapi.Bearing_BearingUnknown {
 					return fmt.Errorf("turn command must be given a valid bearing %s", args[i])
 				}
-				commands = append(commands,
-					&roveapi.Command{
-						Command:   roveapi.CommandType_broadcast,
-						Broadcast: []byte(args[i]),
-					},
-				)
+				cmd = &roveapi.Command{
+					Command: roveapi.CommandType_turn,
+					Bearing: b,
+				}
 			case "broadcast":
 				i++
 				if len(args) == i {
@@ -254,20 +271,51 @@ func InnerMain(command string, args ...string) error {
 				} else if len(args[i]) > 3 {
 					return fmt.Errorf("broadcast command must be given ASCII triplet of 3 or less: %s", args[i])
 				}
-				commands = append(commands,
-					&roveapi.Command{
-						Command:   roveapi.CommandType_broadcast,
-						Broadcast: []byte(args[i]),
-					},
-				)
+				cmd = &roveapi.Command{
+					Command: roveapi.CommandType_broadcast,
+					Data:    []byte(args[i]),
+				}
+			case "upgrade":
+				i++
+				if len(args) == i {
+					return fmt.Errorf("upgrade command must be passed a spec to upgrade")
+				}
+				var u roveapi.RoverUpgrade
+				switch args[i] {
+				case "capacity":
+					u = roveapi.RoverUpgrade_Capacity
+				case "range":
+					u = roveapi.RoverUpgrade_Range
+				case "integrity":
+					u = roveapi.RoverUpgrade_MaximumIntegrity
+				case "charge":
+					u = roveapi.RoverUpgrade_MaximumCharge
+				default:
+					return fmt.Errorf("upgrade command must be passed a known upgrade spec")
+				}
+				cmd = &roveapi.Command{
+					Command: roveapi.CommandType_upgrade,
+					Upgrade: u,
+				}
 			default:
 				// By default just use the command literally
-				commands = append(commands,
-					&roveapi.Command{
-						Command: roveapi.CommandType(roveapi.CommandType_value[args[i]]),
-					},
-				)
+				cmd = &roveapi.Command{
+					Command: roveapi.CommandType(roveapi.CommandType_value[args[i]]),
+				}
 			}
+
+			// Try and convert the next command to a number
+			number := 0
+			if len(args) > i+1 {
+				num, err := strconv.Atoi(args[i+1])
+				if err == nil {
+					number = num
+					i++
+				}
+			}
+			cmd.Repeat = int32(number)
+
+			commands = append(commands, cmd)
 		}
 
 		_, err := client.Command(ctx, &roveapi.CommandRequest{
@@ -355,6 +403,15 @@ func InnerMain(command string, args ...string) error {
 func main() {
 	// Bail without any args
 	if len(os.Args) == 1 {
+		fmt.Fprintf(os.Stderr, "\n")
+		fmt.Fprintln(os.Stderr, "m mm   mmm   m   m   mmm")
+		fmt.Fprintln(os.Stderr, "#\"  \" #\" \"#  \"m m\"  #\"  #")
+		fmt.Fprintln(os.Stderr, "#     #   #   #m#   #\"\"\"\"")
+		fmt.Fprintln(os.Stderr, "#     \"#m#\"    #    \"#mm\"")
+		fmt.Fprintf(os.Stderr, "\n")
+		fmt.Fprintln(os.Stderr, "Rove is an asychronous nomadic game about exploring a planet as part of a loose community.")
+		fmt.Fprintln(os.Stderr, "Visit https://mdiluz.github.io/rove/ for more information.")
+		fmt.Fprintf(os.Stderr, "\n")
 		printUsage()
 		os.Exit(1)
 	}

cmd/rove/main_test.go

@@ -13,6 +13,7 @@ import (
 )
 
 func Test_InnerMain(t *testing.T) {
+	os.Setenv("NO_TLS", "1")
 
 	// Use temporary local user data
 	tmp, err := ioutil.TempDir(os.TempDir(), "rove-")
@@ -53,9 +54,14 @@ func Test_InnerMain(t *testing.T) {
 	assert.NoError(t, InnerMain("command", "toggle"))
 	assert.NoError(t, InnerMain("command", "stash"))
 	assert.NoError(t, InnerMain("command", "repair"))
+	assert.NoError(t, InnerMain("command", "upgrade", "capacity"))
 	assert.NoError(t, InnerMain("command", "broadcast", "abc"))
+	assert.NoError(t, InnerMain("command", "wait", "10"))
+	assert.NoError(t, InnerMain("command", "wait", "1", "turn", "NW", "toggle", "broadcast", "zyx"))
 
 	// Give it malformed commands
 	assert.Error(t, InnerMain("command", "unknown"))
 	assert.Error(t, InnerMain("command", "broadcast"))
+	assert.Error(t, InnerMain("command", "upgrade"))
+	assert.Error(t, InnerMain("command", "1"))
 }

docker-compose-test.yml

@@ -0,0 +1,32 @@
+version: '3'
+
+services:
+  rove-test-server:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: rove:latest
+    ports:
+      - "9090:9090"
+    environment:
+      - PORT=9090
+      - DATA_PATH=/tmp/
+      - WORDS_FILE=data/words_alpha.txt
+      - TICK_RATE=10
+      - NO_TLS=1
+    command: [ "./rove-server"]
+
+  rove-tests:
+    depends_on: [ rove-test-server ]
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: rove:latest
+    environment:
+      - ROVE_GRPC=rove-test-server
+    command: [ "./script/wait-for-it.sh", "rove-test-server:9090", "--", "go", "test", "-v", "./...", "--tags=integration", "-cover", "-coverprofile=/mnt/coverage-data/c.out", "-count", "1" ]
+    volumes:
+      - /tmp/coverage-data:/mnt/coverage-data:rw
+
+
+  

docker-compose.yml

@@ -16,21 +16,10 @@ services:
       - DATA_PATH=/mnt/rove-server
       - WORDS_FILE=data/words_alpha.txt
       - TICK_RATE=3
+      - CERT_NAME=${CERT_NAME}
     volumes:
       - persistent-data:/mnt/rove-server:rw
+      - /etc/letsencrypt/:/etc/letsencrypt/
     command: [ "./rove-server"]
 
-  rove-tests:
-    depends_on: [ rove-server ]
-    build:
-      context: .
-      dockerfile: Dockerfile
-    image: rove:latest
-    environment:
-      - ROVE_GRPC=rove-server
-    command: [ "./script/wait-for-it.sh", "rove-server:9090", "--", "go", "test", "-v", "./...", "--tags=integration", "-cover", "-coverprofile=/mnt/coverage-data/c.out", "-count", "1" ]
-    volumes:
-      - /tmp/coverage-data:/mnt/coverage-data:rw
-
-
   

pkg/accounts/accounts.go

@@ -1,4 +1,4 @@
-package internal
+package accounts
 
 // Accountant decribes something that stores accounts and account values
 type Accountant interface {

pkg/accounts/accounts_test.go

@@ -1,4 +1,4 @@
-package internal
+package accounts
 
 import (
 	"testing"

pkg/accounts/simpleAccountant.go

@@ -1,4 +1,4 @@
-package internal
+package accounts
 
 import (
 	"fmt"

pkg/rove/chunkAtlas.go

@@ -2,7 +2,6 @@ package rove
 
 import (
 	"log"
-	"math/rand"
 
 	"github.com/mdiluz/rove/pkg/maths"
 	"github.com/mdiluz/rove/proto/roveapi"
@@ -111,15 +110,6 @@ func (a *chunkBasedAtlas) populate(chunk int) {
 		}
 	}
 
-	// Set up any objects
-	for i := 0; i < len(c.Tiles); i++ {
-		if rand.Intn(16) == 0 {
-			c.Objects[i] = Object{Type: roveapi.Object_RockLarge}
-		} else if rand.Intn(32) == 0 {
-			c.Objects[i] = Object{Type: roveapi.Object_RockSmall}
-		}
-	}
-
 	a.Chunks[chunk] = c
 }
 

pkg/rove/command_test.go

@@ -1,15 +1,26 @@
 package rove
 
 import (
+	"encoding/json"
 	"testing"
 
+	"github.com/mdiluz/rove/pkg/maths"
 	"github.com/mdiluz/rove/proto/roveapi"
 	"github.com/stretchr/testify/assert"
 )
 
+func TestCommand_Invalid(t *testing.T) {
+	w := NewWorld(8)
+	name, err := w.SpawnRover("")
+	assert.NoError(t, err)
+
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_none})
+	assert.Error(t, err)
+}
+
 func TestCommand_Toggle(t *testing.T) {
 	w := NewWorld(8)
-	a, err := w.SpawnRover()
+	a, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	r, err := w.GetRover(a)
@@ -35,10 +46,10 @@ func TestCommand_Toggle(t *testing.T) {
 
 func TestCommand_Turn(t *testing.T) {
 	w := NewWorld(8)
-	a, err := w.SpawnRover()
+	a, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
-	err = w.Enqueue(a, &roveapi.Command{Command: roveapi.CommandType_turn, Turn: roveapi.Bearing_NorthWest})
+	err = w.Enqueue(a, &roveapi.Command{Command: roveapi.CommandType_turn, Bearing: roveapi.Bearing_NorthWest})
 	assert.NoError(t, err)
 	w.Tick()
 
@@ -48,17 +59,247 @@ func TestCommand_Turn(t *testing.T) {
 }
 
 func TestCommand_Stash(t *testing.T) {
-	// TODO: Test the stash command
+	w := NewWorld(8)
+	name, err := w.SpawnRover("")
+	assert.NoError(t, err)
+
+	info, err := w.GetRover(name)
+	assert.NoError(t, err)
+	assert.Empty(t, info.Inventory)
+
+	// Drop a pickup below us
+	w.Atlas.SetObject(info.Pos, Object{Type: roveapi.Object_RockSmall})
+
+	// Try and stash it
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_stash})
+	assert.NoError(t, err)
+	w.Tick()
+
+	// Check we now have it in the inventory
+	info, err = w.GetRover(name)
+	assert.NoError(t, err)
+	assert.Equal(t, 1, len(info.Inventory))
+	assert.Equal(t, Object{Type: roveapi.Object_RockSmall}, info.Inventory[0])
+
+	// Check it's no longer on the atlas
+	_, obj := w.Atlas.QueryPosition(info.Pos)
+	assert.Equal(t, Object{Type: roveapi.Object_ObjectUnknown}, obj)
 }
 
 func TestCommand_Repair(t *testing.T) {
-	// TODO: Test the repair command
+	w := NewWorld(8)
+	name, err := w.SpawnRover("")
+	assert.NoError(t, err)
+
+	info, err := w.GetRover(name)
+	assert.NoError(t, err)
+	assert.Equal(t, info.MaximumIntegrity, info.Integrity)
+
+	// Put a blocking rock to the north
+	w.Atlas.SetObject(info.Pos.Added(maths.Vector{X: 0, Y: 1}), Object{Type: roveapi.Object_RockLarge})
+
+	// Try and move and make sure we're blocked
+	newpos, err := w.TryMoveRover(name, roveapi.Bearing_North)
+	assert.NoError(t, err)
+	assert.Equal(t, info.Pos, newpos)
+
+	// Check we're damaged
+	info, err = w.GetRover(name)
+	assert.NoError(t, err)
+	assert.Equal(t, info.MaximumIntegrity-1, info.Integrity)
+
+	// Stash a repair object
+	w.Atlas.SetObject(info.Pos, Object{Type: roveapi.Object_RoverParts})
+	obj, err := w.RoverStash(name)
+	assert.NoError(t, err)
+	assert.Equal(t, roveapi.Object_RoverParts, obj)
+
+	// Enqueue the repair and tick
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_repair})
+	assert.NoError(t, err)
+	w.Tick()
+
+	// Check we're repaired
+	info, err = w.GetRover(name)
+	assert.NoError(t, err)
+	assert.Equal(t, info.MaximumIntegrity, info.Integrity)
+	assert.Equal(t, 0, len(info.Inventory))
 }
 
 func TestCommand_Broadcast(t *testing.T) {
-	// TODO: Test the stash command
+	w := NewWorld(8)
+	name, err := w.SpawnRover("")
+	assert.NoError(t, err)
+
+	// Enqueue the broadcast and tick
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_broadcast, Data: []byte("ABC")})
+	assert.NoError(t, err)
+	w.Tick()
+
+	info, err := w.GetRover(name)
+	assert.NoError(t, err)
+	assert.Contains(t, info.Logs[len(info.Logs)-1].Text, "ABC")
 }
 
-func TestCommand_Invalid(t *testing.T) {
-	// TODO: Test an invalid command
+func TestCommand_Salvage(t *testing.T) {
+	w := NewWorld(8)
+	name, err := w.SpawnRover("")
+	assert.NoError(t, err)
+
+	info, err := w.GetRover(name)
+	assert.NoError(t, err)
+
+	w.Atlas.SetObject(info.Pos, Object{Type: roveapi.Object_RoverDormant})
+
+	// Enqueue the broadcast and tick
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_salvage})
+	assert.NoError(t, err)
+	w.Tick()
+
+	// Check we now have some rover parts
+	info, err = w.GetRover(name)
+	assert.NoError(t, err)
+	assert.NotEmpty(t, info.Inventory)
+	for _, i := range info.Inventory {
+		assert.Equal(t, roveapi.Object_RoverParts, i.Type)
+	}
+
+	// Check the dormant rover is gone
+	_, obj := w.Atlas.QueryPosition(info.Pos)
+	assert.Equal(t, roveapi.Object_ObjectUnknown, obj.Type)
+}
+
+func TestCommand_Transfer(t *testing.T) {
+	w := NewWorld(8)
+	acc, err := w.Accountant.RegisterAccount("tmp")
+	assert.NoError(t, err)
+	nameA, err := w.SpawnRover(acc.Name)
+	assert.NoError(t, err)
+
+	infoA, err := w.GetRover(nameA)
+	assert.NoError(t, err)
+
+	// Drop a dormant rover on the current position
+	infoB := DefaultRover()
+	infoB.Name = "abc"
+	infoB.Pos = infoA.Pos
+	data, err := json.Marshal(infoB)
+	assert.NoError(t, err)
+	w.Atlas.SetObject(infoA.Pos, Object{Type: roveapi.Object_RoverDormant, Data: data})
+
+	// Enqueue a transfer as well as a dud command
+	err = w.Enqueue(nameA,
+		&roveapi.Command{Command: roveapi.CommandType_transfer},
+		&roveapi.Command{Command: roveapi.CommandType_broadcast, Data: []byte("xyz")})
+	assert.NoError(t, err)
+	w.Tick()
+
+	// Ensure both command queues are empty
+	assert.Empty(t, w.CommandQueue[nameA])
+	assert.Empty(t, w.CommandQueue[infoB.Name])
+
+	// Verify the account now controls the new rover
+	accountRover, err := w.Accountant.GetValue(acc.Name, "rover")
+	assert.NoError(t, err)
+	assert.Equal(t, infoB.Name, accountRover)
+
+	// Verify the position now has a dormant rover
+	_, obj := w.Atlas.QueryPosition(infoA.Pos)
+	assert.Equal(t, roveapi.Object_RoverDormant, obj.Type)
+
+	// Verify the stored data matches
+	var stored Rover
+	err = json.Unmarshal(obj.Data, &stored)
+	assert.NoError(t, err)
+	assert.Equal(t, infoA.Name, stored.Name)
+
+	// Verify the new rover data matches what we put in
+	infoB2, err := w.GetRover(infoB.Name)
+	assert.NoError(t, err)
+	assert.Equal(t, infoB.Name, infoB2.Name)
+
+}
+
+func TestCommand_Wait(t *testing.T) {
+	w := NewWorld(8)
+	a, err := w.SpawnRover("")
+	assert.NoError(t, err)
+
+	r, err := w.GetRover(a)
+	assert.NoError(t, err)
+	assert.Equal(t, roveapi.SailPosition_SolarCharging, r.SailPosition)
+
+	err = w.Enqueue(a, &roveapi.Command{Command: roveapi.CommandType_wait, Repeat: 4}, &roveapi.Command{Command: roveapi.CommandType_toggle})
+	assert.NoError(t, err)
+
+	// Tick 5 times during the wait (1 normal execute + 4)
+	for i := 0; i < 5; i++ {
+		w.Tick()
+
+		r, err = w.GetRover(a)
+		assert.NoError(t, err)
+		assert.Equal(t, roveapi.SailPosition_SolarCharging, r.SailPosition)
+	}
+
+	// One last tick to do the toggle
+	w.Tick()
+
+	r, err = w.GetRover(a)
+	assert.NoError(t, err)
+	assert.Equal(t, roveapi.SailPosition_CatchingWind, r.SailPosition)
+}
+
+func TestCommand_Upgrade(t *testing.T) {
+	w := NewWorld(8)
+	name, err := w.SpawnRover("")
+	assert.NoError(t, err)
+	rover, ok := w.Rovers[name]
+	assert.True(t, ok)
+
+	// Try an invalid upgrade
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_upgrade})
+	assert.Error(t, err)
+
+	// Try a valid command but without the parts
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_upgrade, Upgrade: roveapi.RoverUpgrade_Capacity})
+	assert.NoError(t, err)
+
+	// Ensure nothing changed and we logged the attempt
+	pre := rover.Capacity
+	w.Tick()
+	assert.Equal(t, pre, rover.Capacity)
+	assert.Contains(t, rover.Logs[len(rover.Logs)-1].Text, "tried")
+
+	// One non-part item
+	rover.Inventory = []Object{
+		{
+			Type: roveapi.Object_RoverParts,
+		},
+		{
+			Type: roveapi.Object_RoverParts,
+		},
+		{
+			Type: roveapi.Object_RockSmall,
+		},
+		{
+			Type: roveapi.Object_RoverParts,
+		},
+		{
+			Type: roveapi.Object_RoverParts,
+		},
+		{
+			Type: roveapi.Object_RoverParts,
+		},
+	}
+
+	// Try a valid command again
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_upgrade, Upgrade: roveapi.RoverUpgrade_Capacity})
+	assert.NoError(t, err)
+
+	// Check that the capacity increases on the tick and all the parts are used
+	pre = rover.Capacity
+	w.Tick()
+	assert.Equal(t, pre+1, rover.Capacity)
+	assert.Equal(t, 1, len(rover.Inventory))
+	assert.Equal(t, roveapi.Object_RockSmall, rover.Inventory[0].Type)
 }

pkg/rove/objects.go

@@ -17,7 +17,6 @@ type Object struct {
 func (o *Object) IsBlocking() bool {
 	var blocking = [...]roveapi.Object{
 		roveapi.Object_RoverLive,
-		roveapi.Object_RoverDormant,
 		roveapi.Object_RockLarge,
 	}
 
@@ -33,6 +32,7 @@ func (o *Object) IsBlocking() bool {
 func (o *Object) IsStashable() bool {
 	var stashable = [...]roveapi.Object{
 		roveapi.Object_RockSmall,
+		roveapi.Object_RoverParts,
 	}
 
 	for _, t := range stashable {

pkg/rove/rover.go

@@ -13,6 +13,10 @@ import (
 	"github.com/mdiluz/rove/proto/roveapi"
 )
 
+const (
+	maxLogEntries = 16
+)
+
 // RoverLogEntry describes a single log entry for the rover
 type RoverLogEntry struct {
 	// Time is the timestamp of the entry
@@ -62,12 +66,15 @@ type Rover struct {
 
 	// Logs Stores log of information
 	Logs []RoverLogEntry
+
+	// The account that owns this rover
+	Owner string
 }
 
 // DefaultRover returns a default rover object with default settings
 func DefaultRover() *Rover {
 	return &Rover{
-		Range:            4,
+		Range:            10,
 		Integrity:        10,
 		MaximumIntegrity: 10,
 		Capacity:         10,
@@ -89,6 +96,11 @@ func (r *Rover) AddLogEntryf(format string, args ...interface{}) {
 			Text: text,
 		},
 	)
+
+	// Limit the number of logs
+	if len(r.Logs) > maxLogEntries {
+		r.Logs = r.Logs[len(r.Logs)-maxLogEntries:]
+	}
 }
 
 var wordsFile = os.Getenv("WORDS_FILE")

pkg/rove/world.go

@@ -1,17 +1,23 @@
 package rove
 
 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"math/rand"
 	"sync"
 
+	"github.com/mdiluz/rove/pkg/accounts"
 	"github.com/mdiluz/rove/pkg/maths"
 	"github.com/mdiluz/rove/proto/roveapi"
 )
 
 const (
-	TicksPerNormalMove = 4
+	// ticksPerNormalMove defines the number of ticks it should take for a "normal" speed move
+	ticksPerNormalMove = 4
+
+	// upgradeCost is the cost in rover parts needed to upgrade a rover specification
+	upgradeCost = 5
 )
 
 // CommandStream is a list of commands to execute in order
@@ -38,6 +44,9 @@ type World struct {
 	// Commands is the set of currently executing command streams per rover
 	CommandQueue map[string]CommandStream
 
+	// Accountant
+	Accountant accounts.Accountant
+
 	// Mutex to lock around all world operations
 	worldMutex sync.RWMutex
 	// Mutex to lock around command operations
@@ -52,17 +61,22 @@ func NewWorld(chunkSize int) *World {
 		Atlas:        NewChunkAtlas(chunkSize),
 		TicksPerDay:  24,
 		CurrentTicks: 0,
+		Accountant:   accounts.NewSimpleAccountant(),
+		Wind:         roveapi.Bearing_North,
 	}
 }
 
-// SpawnRover adds an rover to the game
-func (w *World) SpawnRover() (string, error) {
+// SpawnRover adds an rover to the game (without lock)
+func (w *World) SpawnRover(account string) (string, error) {
 	w.worldMutex.Lock()
 	defer w.worldMutex.Unlock()
 
 	// Initialise the rover
 	rover := DefaultRover()
 
+	// Assign the owner
+	rover.Owner = account
+
 	// Spawn in a random place near the origin
 	rover.Pos = maths.Vector{
 		X: 10 - rand.Intn(20),
@@ -87,7 +101,13 @@ func (w *World) SpawnRover() (string, error) {
 	// Append the rover to the list
 	w.Rovers[rover.Name] = rover
 
-	return rover.Name, nil
+	var err error
+	// Only assign if we've been given an account
+	if len(account) > 0 {
+		err = w.Accountant.AssignData(account, "rover", rover.Name)
+	}
+
+	return rover.Name, err
 }
 
 // GetRover gets a specific rover by name
@@ -164,12 +184,26 @@ func (w *World) DestroyRover(rover string) error {
 	w.worldMutex.Lock()
 	defer w.worldMutex.Unlock()
 
-	_, ok := w.Rovers[rover]
+	r, ok := w.Rovers[rover]
 	if !ok {
 		return fmt.Errorf("no rover matching id")
 	}
 
+	// Remove this rover from tracked rovers
 	delete(w.Rovers, rover)
+
+	r.Owner = ""
+	r.AddLogEntryf("rover destroyed")
+
+	// Marshal the rover data
+	data, err := json.Marshal(r)
+	if err != nil {
+		return err
+	}
+
+	// Place the dormant rover down
+	w.Atlas.SetObject(r.Pos, Object{Type: roveapi.Object_RoverDormant, Data: data})
+
 	return nil
 }
 
@@ -259,9 +293,6 @@ func (w *World) TryMoveRover(rover string, b roveapi.Bearing) (maths.Vector, err
 		i.AddLogEntryf("tried to move %s to %+v", b.String(), newPos)
 		i.Integrity = i.Integrity - 1
 		i.AddLogEntryf("had a collision, new integrity %d", i.Integrity)
-		// TODO: The rover needs to be left dormant with the player
-		//if i.Integrity == 0 {
-		//}
 	}
 
 	return i.Pos, nil
@@ -279,11 +310,13 @@ func (w *World) RoverStash(rover string) (roveapi.Object, error) {
 
 	// Can't pick up when full
 	if len(r.Inventory) >= r.Capacity {
+		r.AddLogEntryf("tried to stash object but inventory was full")
 		return roveapi.Object_ObjectUnknown, nil
 	}
 
 	// Ensure the rover has energy
 	if r.Charge <= 0 {
+		r.AddLogEntryf("tried to stash object but had no charge")
 		return roveapi.Object_ObjectUnknown, nil
 	}
 	r.Charge--
@@ -299,6 +332,99 @@ func (w *World) RoverStash(rover string) (roveapi.Object, error) {
 	return obj.Type, nil
 }
 
+// RoverSalvage will salvage a rover for parts
+func (w *World) RoverSalvage(rover string) (roveapi.Object, error) {
+	w.worldMutex.Lock()
+	defer w.worldMutex.Unlock()
+
+	r, ok := w.Rovers[rover]
+	if !ok {
+		return roveapi.Object_ObjectUnknown, fmt.Errorf("no rover matching id")
+	}
+
+	// Can't pick up when full
+	if len(r.Inventory) >= r.Capacity {
+		r.AddLogEntryf("tried to salvage dormant rover but inventory was full")
+		return roveapi.Object_ObjectUnknown, nil
+	}
+
+	// Ensure the rover has energy
+	if r.Charge <= 0 {
+		r.AddLogEntryf("tried to salvage dormant rover but had no charge")
+		return roveapi.Object_ObjectUnknown, nil
+	}
+	r.Charge--
+
+	_, obj := w.Atlas.QueryPosition(r.Pos)
+	if obj.Type != roveapi.Object_RoverDormant {
+		r.AddLogEntryf("tried to salvage dormant rover but found no rover to salvage")
+		return roveapi.Object_ObjectUnknown, nil
+	}
+
+	r.AddLogEntryf("salvaged dormant rover")
+	for i := 0; i < 5; i++ {
+		if len(r.Inventory) == r.Capacity {
+			break
+		}
+		r.Inventory = append(r.Inventory, Object{Type: roveapi.Object_RoverParts})
+	}
+	w.Atlas.SetObject(r.Pos, Object{Type: roveapi.Object_ObjectUnknown})
+	return obj.Type, nil
+}
+
+// RoverTransfer will transfer rover control to dormant rover
+func (w *World) RoverTransfer(rover string) (string, error) {
+	w.worldMutex.Lock()
+	defer w.worldMutex.Unlock()
+
+	oldRover, ok := w.Rovers[rover]
+	if !ok {
+		return "", fmt.Errorf("no rover matching id")
+	}
+
+	_, obj := w.Atlas.QueryPosition(oldRover.Pos)
+	if obj.Type != roveapi.Object_RoverDormant {
+		oldRover.AddLogEntryf("tried to transfer to dormant rover but found no rover")
+		return "", nil
+	}
+
+	// Unmarshal the dormant rover
+	var newRover Rover
+	err := json.Unmarshal(obj.Data, &newRover)
+	if err != nil {
+		return "", err
+	}
+
+	// Add logs
+	oldRover.AddLogEntryf("transferring to dormant rover %s", newRover.Name)
+	newRover.AddLogEntryf("transferred from rover %s", oldRover.Name)
+
+	// Transfer the ownership
+	err = w.Accountant.AssignData(oldRover.Owner, "rover", newRover.Name)
+	if err != nil {
+		return "", err
+	}
+	newRover.Owner = oldRover.Owner
+	oldRover.Owner = ""
+
+	// Place the old rover in the world
+	oldRoverData, err := json.Marshal(oldRover)
+	if err != nil {
+		return "", err
+	}
+	w.Atlas.SetObject(oldRover.Pos, Object{Type: roveapi.Object_RoverDormant, Data: oldRoverData})
+
+	// Swap the rovers in the tracking
+	w.Rovers[newRover.Name] = &newRover
+	delete(w.Rovers, oldRover.Name)
+
+	// Clear the command queues for both rovers
+	delete(w.CommandQueue, oldRover.Name)
+	delete(w.CommandQueue, newRover.Name)
+
+	return newRover.Name, nil
+}
+
 // RoverToggle will toggle the sail position
 func (w *World) RoverToggle(rover string) (roveapi.SailPosition, error) {
 	w.worldMutex.Lock()
@@ -323,6 +449,65 @@ func (w *World) RoverToggle(rover string) (roveapi.SailPosition, error) {
 	return r.SailPosition, nil
 }
 
+// RoverUpgrade will try to upgrade the rover
+func (w *World) RoverUpgrade(rover string, upgrade roveapi.RoverUpgrade) (int, error) {
+	w.worldMutex.Lock()
+	defer w.worldMutex.Unlock()
+
+	r, ok := w.Rovers[rover]
+	if !ok {
+		return 0, fmt.Errorf("no rover matching id")
+	}
+
+	cost := upgradeCost
+	num := 0
+	for i := range r.Inventory {
+		if r.Inventory[i].Type == roveapi.Object_RoverParts {
+			num++
+		}
+	}
+
+	if num < cost {
+		r.AddLogEntryf("tried to upgrade but lacked rover parts")
+		return 0, nil
+	}
+
+	// Apply the upgrade
+	var ret int
+	switch upgrade {
+	case roveapi.RoverUpgrade_Capacity:
+		r.Capacity++
+		ret = r.Capacity
+	case roveapi.RoverUpgrade_Range:
+		r.Range++
+		ret = r.Range
+	case roveapi.RoverUpgrade_MaximumCharge:
+		r.MaximumCharge++
+		ret = r.MaximumCharge
+	case roveapi.RoverUpgrade_MaximumIntegrity:
+		r.MaximumIntegrity++
+		ret = r.MaximumIntegrity
+	default:
+		return 0, fmt.Errorf("unknown upgrade: %s", upgrade)
+	}
+
+	// Remove the cost in rover parts
+	var n []Object
+	for _, o := range r.Inventory {
+		if o.Type == roveapi.Object_RoverParts && cost > 0 {
+			cost--
+		} else {
+			n = append(n, o)
+		}
+	}
+	// Assign back the inventory
+	r.Inventory = n
+
+	r.AddLogEntryf("upgraded %s to %d", upgrade, ret)
+
+	return ret, nil
+}
+
 // RoverTurn will turn the rover
 func (w *World) RoverTurn(rover string, bearing roveapi.Bearing) (roveapi.Bearing, error) {
 	w.worldMutex.Lock()
@@ -351,11 +536,24 @@ func (w *World) RoverRepair(rover string) (int, error) {
 		return 0, fmt.Errorf("no rover matching id")
 	}
 
-	// Consume an inventory item to repair if possible
-	if len(r.Inventory) > 0 && r.Integrity < r.MaximumIntegrity {
-		r.Inventory = r.Inventory[:len(r.Inventory)-1]
-		r.Integrity = r.Integrity + 1
-		r.AddLogEntryf("repaired self to %d", r.Integrity)
+	// Can't repair past max
+	if r.Integrity >= r.MaximumIntegrity {
+		return r.Integrity, nil
+	}
+
+	// Find rover parts in inventory
+	for i, o := range r.Inventory {
+		if o.Type == roveapi.Object_RoverParts {
+
+			// Copy-erase from slice
+			r.Inventory[i] = r.Inventory[len(r.Inventory)-1]
+			r.Inventory = r.Inventory[:len(r.Inventory)-1]
+
+			// Repair
+			r.Integrity = r.Integrity + 1
+			r.AddLogEntryf("repaired self to %d", r.Integrity)
+			break
+		}
 	}
 
 	return r.Integrity, nil
@@ -434,21 +632,28 @@ func (w *World) Enqueue(rover string, commands ...*roveapi.Command) error {
 	for _, c := range commands {
 		switch c.Command {
 		case roveapi.CommandType_broadcast:
-			if len(c.GetBroadcast()) > 3 {
-				return fmt.Errorf("too many characters in message (limit 3): %d", len(c.GetBroadcast()))
+			if len(c.GetData()) > 3 {
+				return fmt.Errorf("too many characters in message (limit 3): %d", len(c.GetData()))
 			}
-			for _, b := range c.GetBroadcast() {
+			for _, b := range c.GetData() {
 				if b < 37 || b > 126 {
 					return fmt.Errorf("invalid message character: %c", b)
 				}
 			}
 		case roveapi.CommandType_turn:
-			if c.GetTurn() == roveapi.Bearing_BearingUnknown {
+			if c.GetBearing() == roveapi.Bearing_BearingUnknown {
 				return fmt.Errorf("turn command given unknown bearing")
 			}
+		case roveapi.CommandType_upgrade:
+			if c.GetUpgrade() == roveapi.RoverUpgrade_RoverUpgradeUnknown {
+				return fmt.Errorf("upgrade command given unknown upgrade")
+			}
+		case roveapi.CommandType_wait:
 		case roveapi.CommandType_toggle:
 		case roveapi.CommandType_stash:
 		case roveapi.CommandType_repair:
+		case roveapi.CommandType_salvage:
+		case roveapi.CommandType_transfer:
 			// Nothing to verify
 		default:
 			return fmt.Errorf("unknown command: %s", c.Command)
@@ -474,13 +679,17 @@ func (w *World) Tick() {
 		if len(cmds) != 0 {
 
 			// Execute the command
-			if err := w.ExecuteCommand(cmds[0], rover); err != nil {
+			if done, err := w.ExecuteCommand(cmds[0], rover); err != nil {
 				log.Println(err)
 				// TODO: Report this error somehow
-			}
 
-			// Extract the first command in the queue
-			w.CommandQueue[rover] = cmds[1:]
+			} else if done {
+				// Extract the first command in the queue
+				// Only if the command queue still has entries (the command may have modified this queue)
+				if _, ok := w.CommandQueue[rover]; ok {
+					w.CommandQueue[rover] = cmds[1:]
+				}
+			}
 
 		} else {
 			// Clean out the empty entry
@@ -488,11 +697,6 @@ func (w *World) Tick() {
 		}
 	}
 
-	// Change the wind every day
-	if (w.CurrentTicks % w.TicksPerDay) == 0 {
-		w.Wind = roveapi.Bearing((rand.Int() % 8) + 1) // Random cardinal bearing
-	}
-
 	// Move all the rovers based on current wind and sails
 	for n, r := range w.Rovers {
 		// Skip if we're not catching the wind
@@ -515,16 +719,16 @@ func (w *World) Tick() {
 		switch diff {
 		case 0:
 			// Going with the wind, travel at base speed of once every 4 ticks
-			ticksToMove = TicksPerNormalMove
+			ticksToMove = ticksPerNormalMove
 		case 1:
 			// At a slight angle, we can go a little faster
-			ticksToMove = TicksPerNormalMove / 2
+			ticksToMove = ticksPerNormalMove / 2
 		case 2:
 			// Perpendicular to wind, max speed
 			ticksToMove = 1
 		case 3:
 			// Heading at 45 degrees into the wind, back to min speed
-			ticksToMove = TicksPerNormalMove
+			ticksToMove = ticksPerNormalMove
 		case 4:
 			// Heading durectly into the wind, no movement at all
 		default:
@@ -544,44 +748,64 @@ func (w *World) Tick() {
 		}
 	}
 
+	// Check all rover integrities
+	for _, r := range w.Rovers {
+		if r.Integrity <= 0 {
+			// The rover has died destroy it
+			err := w.DestroyRover(r.Name)
+			if err != nil {
+				log.Println(err)
+				// TODO: Report this error somehow
+			}
+
+			// Spawn a new one for this account
+			_, err = w.SpawnRover(r.Owner)
+			if err != nil {
+				log.Println(err)
+				// TODO: Report this error somehow
+			}
+		}
+	}
+
 	// Increment the current tick count
 	w.CurrentTicks++
+
+	// Change the wind every day
+	if (w.CurrentTicks % w.TicksPerDay) == 0 {
+		w.Wind = roveapi.Bearing((rand.Int() % 8) + 1) // Random cardinal bearing
+	}
 }
 
 // ExecuteCommand will execute a single command
-func (w *World) ExecuteCommand(c *roveapi.Command, rover string) (err error) {
+func (w *World) ExecuteCommand(c *roveapi.Command, rover string) (done bool, err error) {
 	log.Printf("Executing command: %+v for %s\n", c.Command, rover)
 
 	switch c.Command {
 	case roveapi.CommandType_toggle:
-		if _, err := w.RoverToggle(rover); err != nil {
-			return err
-		}
+		_, err = w.RoverToggle(rover)
 	case roveapi.CommandType_stash:
-		if _, err := w.RoverStash(rover); err != nil {
-			return err
-		}
-
+		_, err = w.RoverStash(rover)
 	case roveapi.CommandType_repair:
-		if _, err := w.RoverRepair(rover); err != nil {
-			return err
-		}
-
+		_, err = w.RoverRepair(rover)
 	case roveapi.CommandType_broadcast:
-		if err := w.RoverBroadcast(rover, c.GetBroadcast()); err != nil {
-			return err
-		}
-
+		err = w.RoverBroadcast(rover, c.GetData())
 	case roveapi.CommandType_turn:
-		if _, err := w.RoverTurn(rover, c.GetTurn()); err != nil {
-			return err
-		}
-
+		_, err = w.RoverTurn(rover, c.GetBearing())
+	case roveapi.CommandType_salvage:
+		_, err = w.RoverSalvage(rover)
+	case roveapi.CommandType_transfer:
+		_, err = w.RoverTransfer(rover)
+	case roveapi.CommandType_upgrade:
+		_, err = w.RoverUpgrade(rover, c.GetUpgrade())
+	case roveapi.CommandType_wait:
+		// Nothing to do
 	default:
-		return fmt.Errorf("unknown command: %s", c.Command)
+		return true, fmt.Errorf("unknown command: %s", c.Command)
 	}
 
-	return
+	// Decrement the repeat number
+	c.Repeat--
+	return c.Repeat < 0, err
 }
 
 // Daytime returns if it's currently daytime

pkg/rove/world_test.go

@@ -18,9 +18,9 @@ func TestNewWorld(t *testing.T) {
 
 func TestWorld_CreateRover(t *testing.T) {
 	world := NewWorld(8)
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Basic duplicate check
@@ -33,7 +33,7 @@ func TestWorld_CreateRover(t *testing.T) {
 
 func TestWorld_GetRover(t *testing.T) {
 	world := NewWorld(4)
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	rover, err := world.GetRover(a)
@@ -44,9 +44,9 @@ func TestWorld_GetRover(t *testing.T) {
 
 func TestWorld_DestroyRover(t *testing.T) {
 	world := NewWorld(1)
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	err = world.DestroyRover(a)
@@ -62,7 +62,7 @@ func TestWorld_DestroyRover(t *testing.T) {
 
 func TestWorld_GetSetMovePosition(t *testing.T) {
 	world := NewWorld(4)
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	pos := maths.Vector{
@@ -97,9 +97,9 @@ func TestWorld_GetSetMovePosition(t *testing.T) {
 func TestWorld_RadarFromRover(t *testing.T) {
 	// Create world that should have visible walls on the radar
 	world := NewWorld(2)
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Warp the rovers into position
@@ -109,15 +109,16 @@ func TestWorld_RadarFromRover(t *testing.T) {
 	world.Atlas.SetObject(maths.Vector{X: 0, Y: 0}, Object{Type: roveapi.Object_ObjectUnknown})
 	assert.NoError(t, world.WarpRover(a, maths.Vector{X: 0, Y: 0}), "Failed to warp rover")
 
+	r, err := world.GetRover(a)
+	assert.NoError(t, err)
+
 	radar, objs, err := world.RadarFromRover(a)
 	assert.NoError(t, err, "Failed to get radar from rover")
-	fullRange := 4 + 4 + 1
+	fullRange := r.Range + r.Range + 1
 	assert.Equal(t, fullRange*fullRange, len(radar), "Radar returned wrong length")
 	assert.Equal(t, fullRange*fullRange, len(objs), "Radar returned wrong length")
 
-	// Test the expected values
-	assert.Equal(t, roveapi.Object_RoverLive, objs[1+fullRange])
-	assert.Equal(t, roveapi.Object_RoverLive, objs[4+4*fullRange])
+	// TODO: Verify the other rover is on the radar
 
 	// Check the radar results are stable
 	radar1, objs1, err := world.RadarFromRover(a)
@@ -128,9 +129,11 @@ func TestWorld_RadarFromRover(t *testing.T) {
 	assert.Equal(t, objs1, objs2)
 }
 
-func TestWorld_RoverStash(t *testing.T) {
+func TestWorld_RoverDamage(t *testing.T) {
 	world := NewWorld(2)
-	a, err := world.SpawnRover()
+	acc, err := world.Accountant.RegisterAccount("tmp")
+	assert.NoError(t, err)
+	a, err := world.SpawnRover(acc.Name)
 	assert.NoError(t, err)
 
 	pos := maths.Vector{
@@ -142,78 +145,6 @@ func TestWorld_RoverStash(t *testing.T) {
 	err = world.WarpRover(a, pos)
 	assert.NoError(t, err, "Failed to set position for rover")
 
-	rover, err := world.GetRover(a)
-	assert.NoError(t, err, "Failed to get rover")
-
-	for i := 0; i < rover.Capacity; i++ {
-		// Place an object
-		world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RockSmall})
-
-		// Pick it up
-		o, err := world.RoverStash(a)
-		assert.NoError(t, err, "Failed to stash")
-		assert.Equal(t, roveapi.Object_RockSmall, o, "Failed to get correct object")
-
-		// Check it's gone
-		_, obj := world.Atlas.QueryPosition(pos)
-		assert.Equal(t, roveapi.Object_ObjectUnknown, obj.Type, "Stash failed to remove object from atlas")
-
-		// Check we have it
-		inv, err := world.RoverInventory(a)
-		assert.NoError(t, err, "Failed to get inventory")
-		assert.Equal(t, i+1, len(inv))
-		assert.Equal(t, Object{Type: roveapi.Object_RockSmall}, inv[i])
-
-		// Check that this did reduce the charge
-		info, err := world.GetRover(a)
-		assert.NoError(t, err, "Failed to get rover")
-		assert.Equal(t, info.MaximumCharge-(i+1), info.Charge, "Rover lost charge for stash")
-		assert.Contains(t, info.Logs[len(info.Logs)-1].Text, "stashed", "Rover logs should contain the move")
-	}
-
-	// Recharge the rover
-	for i := 0; i < rover.MaximumCharge; i++ {
-		_, err = world.RoverRecharge(a)
-		assert.NoError(t, err)
-
-	}
-
-	// Place an object
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RockSmall})
-
-	// Try to pick it up
-	o, err := world.RoverStash(a)
-	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_ObjectUnknown, o, "Failed to get correct object")
-
-	// Check it's still there
-	_, obj := world.Atlas.QueryPosition(pos)
-	assert.Equal(t, roveapi.Object_RockSmall, obj.Type, "Stash failed to remove object from atlas")
-
-	// Check we don't have it
-	inv, err := world.RoverInventory(a)
-	assert.NoError(t, err, "Failed to get inventory")
-	assert.Equal(t, rover.Capacity, len(inv))
-
-	// Check that this didn't reduce the charge
-	info, err := world.GetRover(a)
-	assert.NoError(t, err, "Failed to get rover")
-	assert.Equal(t, info.MaximumCharge, info.Charge, "Rover lost charge for non-stash")
-}
-
-func TestWorld_RoverDamage(t *testing.T) {
-	world := NewWorld(2)
-	a, err := world.SpawnRover()
-	assert.NoError(t, err)
-
-	pos := maths.Vector{
-		X: 0.0,
-		Y: 0.0,
-	}
-
-	err = world.WarpRover(a, pos)
-	assert.NoError(t, err, "Failed to set position for rover")
-
 	info, err := world.GetRover(a)
 	assert.NoError(t, err, "couldn't get rover info")
 
@@ -227,69 +158,29 @@ func TestWorld_RoverDamage(t *testing.T) {
 	assert.NoError(t, err, "couldn't get rover info")
 	assert.Equal(t, info.Integrity-1, newinfo.Integrity, "rover should have lost integrity")
 	assert.Contains(t, newinfo.Logs[len(newinfo.Logs)-1].Text, "collision", "Rover logs should contain the collision")
-}
 
-func TestWorld_RoverRepair(t *testing.T) {
-	world := NewWorld(2)
-	a, err := world.SpawnRover()
-	assert.NoError(t, err)
-
-	pos := maths.Vector{
-		X: 0.0,
-		Y: 0.0,
+	// Keep moving to damage the rover
+	for i := 0; i < info.Integrity-1; i++ {
+		vec, err := world.TryMoveRover(a, roveapi.Bearing_North)
+		assert.NoError(t, err, "Failed to move rover")
+		assert.Equal(t, pos, vec, "Rover managed to move into large rock")
 	}
 
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_ObjectUnknown})
+	// Tick the world to check for rover deaths
+	world.Tick()
 
-	err = world.WarpRover(a, pos)
-	assert.NoError(t, err, "Failed to set position for rover")
+	// Rover should have been destroyed now
+	_, err = world.GetRover(a)
+	assert.Error(t, err)
 
-	originalInfo, err := world.GetRover(a)
-	assert.NoError(t, err, "couldn't get rover info")
-
-	// Pick up something to repair with
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RockSmall})
-	o, err := world.RoverStash(a)
-	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_RockSmall, o, "Failed to get correct object")
-
-	world.Atlas.SetObject(maths.Vector{X: 0.0, Y: 1.0}, Object{Type: roveapi.Object_RockLarge})
-
-	// Try and bump into the rock
-	vec, err := world.TryMoveRover(a, roveapi.Bearing_North)
-	assert.NoError(t, err, "Failed to move rover")
-	assert.Equal(t, pos, vec, "Rover managed to move into large rock")
-
-	newinfo, err := world.GetRover(a)
-	assert.NoError(t, err, "couldn't get rover info")
-	assert.Equal(t, originalInfo.Integrity-1, newinfo.Integrity, "rover should have lost integrity")
-
-	err = world.ExecuteCommand(&roveapi.Command{Command: roveapi.CommandType_repair}, a)
-	assert.NoError(t, err, "Failed to repair rover")
-
-	newinfo, err = world.GetRover(a)
-	assert.NoError(t, err, "couldn't get rover info")
-	assert.Equal(t, originalInfo.Integrity, newinfo.Integrity, "rover should have gained integrity")
-	assert.Contains(t, newinfo.Logs[len(newinfo.Logs)-1].Text, "repair", "Rover logs should contain the repair")
-
-	// Check again that it can't repair past the max
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RockSmall})
-	o, err = world.RoverStash(a)
-	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_RockSmall, o, "Failed to get correct object")
-
-	err = world.ExecuteCommand(&roveapi.Command{Command: roveapi.CommandType_repair}, a)
-	assert.NoError(t, err, "Failed to repair rover")
-
-	newinfo, err = world.GetRover(a)
-	assert.NoError(t, err, "couldn't get rover info")
-	assert.Equal(t, originalInfo.Integrity, newinfo.Integrity, "rover should have kept the same integrity")
+	_, obj := world.Atlas.QueryPosition(info.Pos)
+	assert.Equal(t, roveapi.Object_RoverDormant, obj.Type)
 }
 
 func TestWorld_Daytime(t *testing.T) {
 	world := NewWorld(1)
 
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Remove rover charge
@@ -328,10 +219,10 @@ func TestWorld_Daytime(t *testing.T) {
 func TestWorld_Broadcast(t *testing.T) {
 	world := NewWorld(8)
 
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Warp rovers near to eachother
@@ -394,7 +285,7 @@ func TestWorld_Sailing(t *testing.T) {
 	world.Tick()                       // One initial tick to set the wind direction the first time
 	world.Wind = roveapi.Bearing_North // Set the wind direction to north
 
-	name, err := world.SpawnRover()
+	name, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Warp the rover to 0,0 after clearing it
@@ -419,7 +310,7 @@ func TestWorld_Sailing(t *testing.T) {
 	assert.Equal(t, maths.Vector{Y: 0}, info.Pos)
 
 	// Loop a few more times
-	for i := 0; i < TicksPerNormalMove-2; i++ {
+	for i := 0; i < ticksPerNormalMove-2; i++ {
 		world.Tick()
 		info, err := world.GetRover(name)
 		assert.NoError(t, err)
@@ -441,7 +332,7 @@ func TestWorld_Sailing(t *testing.T) {
 	assert.Equal(t, roveapi.Bearing_South, b)
 
 	// Tick a bunch, we should never move
-	for i := 0; i < TicksPerNormalMove*2; i++ {
+	for i := 0; i < ticksPerNormalMove*2; i++ {
 		world.Tick()
 		info, err := world.GetRover(name)
 		assert.NoError(t, err)

pkg/rove/worldgen.go

@@ -1,9 +1,6 @@
 package rove
 
 import (
-	"encoding/json"
-	"log"
-
 	"github.com/mdiluz/rove/pkg/maths"
 	"github.com/mdiluz/rove/proto/roveapi"
 	"github.com/ojrac/opensimplex-go"
@@ -32,8 +29,9 @@ func NewNoiseWorldGen(seed int64) WorldGen {
 }
 
 const (
-	terrainNoiseScale = 6
+	terrainNoiseScale = 15
 	rockNoiseScale    = 3
+	partsNoiseScale   = 2
 )
 
 // GetTile returns the chosen tile at a location
@@ -51,43 +49,22 @@ func (g *NoiseWorldGen) GetTile(v maths.Vector) roveapi.Tile {
 
 // GetObject returns the chosen object at a location
 func (g *NoiseWorldGen) GetObject(v maths.Vector) (obj Object) {
-	o := g.noise.Eval2(float64(v.X)/rockNoiseScale, float64(v.Y)/rockNoiseScale)
+	r := g.noise.Eval2(float64(v.X)/rockNoiseScale, float64(v.Y)/rockNoiseScale)
 	switch {
-	case o > 0.6:
+	// Prioritise rocks
+	case r > 0.6:
 		obj.Type = roveapi.Object_RockLarge
-	case o > 0.5:
+	case r > 0.5:
 		obj.Type = roveapi.Object_RockSmall
-	}
 
-	// Very rarely spawn a dormant rover
-	if obj.Type == roveapi.Object_ObjectUnknown {
-		// TODO: Make this better, ideally with noise
-		if v.X%25 == 0 && v.Y%25 == 0 && v.X != 0 && v.Y != 0 {
-			obj.Type = roveapi.Object_RoverDormant
+	default:
+		// Otherwise, try some rover parts
+		p := g.noise.Eval2(float64(v.X)/partsNoiseScale, float64(v.Y)/partsNoiseScale)
+		switch {
+		case p > 0.7:
+			obj.Type = roveapi.Object_RoverParts
 		}
 	}
 
-	// Post process any spawned objects
-	switch obj.Type {
-	case roveapi.Object_RoverDormant:
-		// Create the rover
-		r := DefaultRover()
-
-		// Set the rover variables
-		r.Pos = v
-
-		// For now, mark the log as corrupted
-		r.AddLogEntryf("log corrupted")
-
-		// Marshal the rover data into the object data
-		b, err := json.Marshal(r)
-		if err != nil {
-			log.Fatalf("couldn't marshal rover, should never fail: %s", err)
-		}
-
-		// Store the bytes
-		obj.Data = b
-	}
-
 	return obj
 }

proto/roveapi/roveapi.pb.go

@@ -39,35 +39,51 @@ type CommandType int32
 
 const (
 	CommandType_none CommandType = 0
+	// Waits before performing the next command
+	CommandType_wait CommandType = 1
 	// Toggles the sails, either catching the wind, or charging from the sun
-	CommandType_toggle CommandType = 1
-	// Turns the rover in the specified bearing, requires data
-	CommandType_turn CommandType = 2
+	CommandType_toggle CommandType = 2
+	// Turns the rover in the specified bearing (requires bearing)
+	CommandType_turn CommandType = 3
 	// Stashes item at current location in rover inventory
-	CommandType_stash CommandType = 3
+	CommandType_stash CommandType = 4
 	// Repairs the rover using an inventory object
-	CommandType_repair CommandType = 4
-	// Broadcasts a message to nearby rovers, requires data
-	CommandType_broadcast CommandType = 5
+	CommandType_repair CommandType = 5
+	// Broadcasts a message to nearby rovers (requires data)
+	CommandType_broadcast CommandType = 6
+	// Salvages a neighboring dormant rover for parts
+	CommandType_salvage CommandType = 7
+	// Transfers remote control into dormant rover
+	CommandType_transfer CommandType = 8
+	// Upgrades a chosen rover specification using 5 rover parts
+	CommandType_upgrade CommandType = 9
 )
 
 // Enum value maps for CommandType.
 var (
 	CommandType_name = map[int32]string{
 		0: "none",
-		1: "toggle",
-		2: "turn",
-		3: "stash",
-		4: "repair",
-		5: "broadcast",
+		1: "wait",
+		2: "toggle",
+		3: "turn",
+		4: "stash",
+		5: "repair",
+		6: "broadcast",
+		7: "salvage",
+		8: "transfer",
+		9: "upgrade",
 	}
 	CommandType_value = map[string]int32{
 		"none":      0,
-		"toggle":    1,
-		"turn":      2,
-		"stash":     3,
-		"repair":    4,
-		"broadcast": 5,
+		"wait":      1,
+		"toggle":    2,
+		"turn":      3,
+		"stash":     4,
+		"repair":    5,
+		"broadcast": 6,
+		"salvage":   7,
+		"transfer":  8,
+		"upgrade":   9,
 	}
 )
 
@@ -167,6 +183,62 @@ func (Bearing) EnumDescriptor() ([]byte, []int) {
 	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{1}
 }
 
+// Describes the type of upgrade
+type RoverUpgrade int32
+
+const (
+	RoverUpgrade_RoverUpgradeUnknown RoverUpgrade = 0
+	RoverUpgrade_Range               RoverUpgrade = 1
+	RoverUpgrade_Capacity            RoverUpgrade = 2
+	RoverUpgrade_MaximumIntegrity    RoverUpgrade = 3
+	RoverUpgrade_MaximumCharge       RoverUpgrade = 4
+)
+
+// Enum value maps for RoverUpgrade.
+var (
+	RoverUpgrade_name = map[int32]string{
+		0: "RoverUpgradeUnknown",
+		1: "Range",
+		2: "Capacity",
+		3: "MaximumIntegrity",
+		4: "MaximumCharge",
+	}
+	RoverUpgrade_value = map[string]int32{
+		"RoverUpgradeUnknown": 0,
+		"Range":               1,
+		"Capacity":            2,
+		"MaximumIntegrity":    3,
+		"MaximumCharge":       4,
+	}
+)
+
+func (x RoverUpgrade) Enum() *RoverUpgrade {
+	p := new(RoverUpgrade)
+	*p = x
+	return p
+}
+
+func (x RoverUpgrade) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (RoverUpgrade) Descriptor() protoreflect.EnumDescriptor {
+	return file_roveapi_roveapi_proto_enumTypes[2].Descriptor()
+}
+
+func (RoverUpgrade) Type() protoreflect.EnumType {
+	return &file_roveapi_roveapi_proto_enumTypes[2]
+}
+
+func (x RoverUpgrade) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use RoverUpgrade.Descriptor instead.
+func (RoverUpgrade) EnumDescriptor() ([]byte, []int) {
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{2}
+}
+
 // Types of objects
 type Object int32
 
@@ -181,6 +253,9 @@ const (
 	Object_RockSmall Object = 3
 	// RockLarge is a large blocking rock
 	Object_RockLarge Object = 4
+	// RoverParts is one unit of rover parts, used for repairing and fixing the
+	// rover
+	Object_RoverParts Object = 5
 )
 
 // Enum value maps for Object.
@@ -191,6 +266,7 @@ var (
 		2: "RoverDormant",
 		3: "RockSmall",
 		4: "RockLarge",
+		5: "RoverParts",
 	}
 	Object_value = map[string]int32{
 		"ObjectUnknown": 0,
@@ -198,6 +274,7 @@ var (
 		"RoverDormant":  2,
 		"RockSmall":     3,
 		"RockLarge":     4,
+		"RoverParts":    5,
 	}
 )
 
@@ -212,11 +289,11 @@ func (x Object) String() string {
 }
 
 func (Object) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[2].Descriptor()
+	return file_roveapi_roveapi_proto_enumTypes[3].Descriptor()
 }
 
 func (Object) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[2]
+	return &file_roveapi_roveapi_proto_enumTypes[3]
 }
 
 func (x Object) Number() protoreflect.EnumNumber {
@@ -225,7 +302,7 @@ func (x Object) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use Object.Descriptor instead.
 func (Object) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{2}
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{3}
 }
 
 type Tile int32
@@ -268,11 +345,11 @@ func (x Tile) String() string {
 }
 
 func (Tile) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[3].Descriptor()
+	return file_roveapi_roveapi_proto_enumTypes[4].Descriptor()
 }
 
 func (Tile) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[3]
+	return &file_roveapi_roveapi_proto_enumTypes[4]
 }
 
 func (x Tile) Number() protoreflect.EnumNumber {
@@ -281,7 +358,7 @@ func (x Tile) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use Tile.Descriptor instead.
 func (Tile) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{3}
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{4}
 }
 
 // SailPosition represents the position of the sola sail
@@ -320,11 +397,11 @@ func (x SailPosition) String() string {
 }
 
 func (SailPosition) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[4].Descriptor()
+	return file_roveapi_roveapi_proto_enumTypes[5].Descriptor()
 }
 
 func (SailPosition) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[4]
+	return &file_roveapi_roveapi_proto_enumTypes[5]
 }
 
 func (x SailPosition) Number() protoreflect.EnumNumber {
@@ -333,7 +410,7 @@ func (x SailPosition) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use SailPosition.Descriptor instead.
 func (SailPosition) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{4}
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{5}
 }
 
 // ServerStatusRequest is an empty placeholder
@@ -624,11 +701,15 @@ type Command struct {
 
 	// The command type
 	Command CommandType `protobuf:"varint,1,opt,name=command,proto3,enum=roveapi.CommandType" json:"command,omitempty"`
-	// A simple message, must be composed of printable ASCII glyphs (32-126)
-	// maximum of three characters
-	Broadcast []byte `protobuf:"bytes,2,opt,name=broadcast,proto3" json:"broadcast,omitempty"`
-	// The bearing for the rover to turn to
-	Turn Bearing `protobuf:"varint,3,opt,name=turn,proto3,enum=roveapi.Bearing" json:"turn,omitempty"`
+	// The number of times to repeat the command after the first
+	Repeat int32 `protobuf:"varint,2,opt,name=repeat,proto3" json:"repeat,omitempty"`
+	// broadcast - a simple message, must be composed of up to 3 printable ASCII
+	// glyphs (32-126)
+	Data []byte `protobuf:"bytes,3,opt,name=data,proto3" json:"data,omitempty"`
+	// move - the bearing for the rover to turn to
+	Bearing Bearing `protobuf:"varint,4,opt,name=bearing,proto3,enum=roveapi.Bearing" json:"bearing,omitempty"`
+	// upgrade - the upgrade to apply to the rover
+	Upgrade RoverUpgrade `protobuf:"varint,5,opt,name=upgrade,proto3,enum=roveapi.RoverUpgrade" json:"upgrade,omitempty"`
 }
 
 func (x *Command) Reset() {
@@ -670,20 +751,34 @@ func (x *Command) GetCommand() CommandType {
 	return CommandType_none
 }
 
-func (x *Command) GetBroadcast() []byte {
+func (x *Command) GetRepeat() int32 {
 	if x != nil {
-		return x.Broadcast
+		return x.Repeat
+	}
+	return 0
+}
+
+func (x *Command) GetData() []byte {
+	if x != nil {
+		return x.Data
 	}
 	return nil
 }
 
-func (x *Command) GetTurn() Bearing {
+func (x *Command) GetBearing() Bearing {
 	if x != nil {
-		return x.Turn
+		return x.Bearing
 	}
 	return Bearing_BearingUnknown
 }
 
+func (x *Command) GetUpgrade() RoverUpgrade {
+	if x != nil {
+		return x.Upgrade
+	}
+	return RoverUpgrade_RoverUpgradeUnknown
+}
+
 // CommandRequest describes a set of commands to be requested for the rover
 type CommandRequest struct {
 	state         protoimpl.MessageState
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 }
 
 var (
@@ -1546,66 +1657,68 @@ func file_roveapi_roveapi_proto_rawDescGZIP() []byte {
 	return file_roveapi_roveapi_proto_rawDescData
 }
 
-var file_roveapi_roveapi_proto_enumTypes = make([]protoimpl.EnumInfo, 5)
+var file_roveapi_roveapi_proto_enumTypes = make([]protoimpl.EnumInfo, 6)
 var file_roveapi_roveapi_proto_msgTypes = make([]protoimpl.MessageInfo, 17)
 var file_roveapi_roveapi_proto_goTypes = []interface{}{
 	(CommandType)(0),             // 0: roveapi.CommandType
 	(Bearing)(0),                 // 1: roveapi.Bearing
-	(Object)(0),                  // 2: roveapi.Object
-	(Tile)(0),                    // 3: roveapi.Tile
-	(SailPosition)(0),            // 4: roveapi.SailPosition
-	(*ServerStatusRequest)(nil),  // 5: roveapi.ServerStatusRequest
-	(*ServerStatusResponse)(nil), // 6: roveapi.ServerStatusResponse
-	(*RegisterRequest)(nil),      // 7: roveapi.RegisterRequest
-	(*Account)(nil),              // 8: roveapi.Account
-	(*RegisterResponse)(nil),     // 9: roveapi.RegisterResponse
-	(*Command)(nil),              // 10: roveapi.Command
-	(*CommandRequest)(nil),       // 11: roveapi.CommandRequest
-	(*CommandResponse)(nil),      // 12: roveapi.CommandResponse
-	(*RadarRequest)(nil),         // 13: roveapi.RadarRequest
-	(*RadarResponse)(nil),        // 14: roveapi.RadarResponse
-	(*StatusRequest)(nil),        // 15: roveapi.StatusRequest
-	(*Log)(nil),                  // 16: roveapi.Log
-	(*Vector)(nil),               // 17: roveapi.Vector
-	(*RoverSpecifications)(nil),  // 18: roveapi.RoverSpecifications
-	(*RoverStatus)(nil),          // 19: roveapi.RoverStatus
-	(*RoverReadings)(nil),        // 20: roveapi.RoverReadings
-	(*StatusResponse)(nil),       // 21: roveapi.StatusResponse
+	(RoverUpgrade)(0),            // 2: roveapi.RoverUpgrade
+	(Object)(0),                  // 3: roveapi.Object
+	(Tile)(0),                    // 4: roveapi.Tile
+	(SailPosition)(0),            // 5: roveapi.SailPosition
+	(*ServerStatusRequest)(nil),  // 6: roveapi.ServerStatusRequest
+	(*ServerStatusResponse)(nil), // 7: roveapi.ServerStatusResponse
+	(*RegisterRequest)(nil),      // 8: roveapi.RegisterRequest
+	(*Account)(nil),              // 9: roveapi.Account
+	(*RegisterResponse)(nil),     // 10: roveapi.RegisterResponse
+	(*Command)(nil),              // 11: roveapi.Command
+	(*CommandRequest)(nil),       // 12: roveapi.CommandRequest
+	(*CommandResponse)(nil),      // 13: roveapi.CommandResponse
+	(*RadarRequest)(nil),         // 14: roveapi.RadarRequest
+	(*RadarResponse)(nil),        // 15: roveapi.RadarResponse
+	(*StatusRequest)(nil),        // 16: roveapi.StatusRequest
+	(*Log)(nil),                  // 17: roveapi.Log
+	(*Vector)(nil),               // 18: roveapi.Vector
+	(*RoverSpecifications)(nil),  // 19: roveapi.RoverSpecifications
+	(*RoverStatus)(nil),          // 20: roveapi.RoverStatus
+	(*RoverReadings)(nil),        // 21: roveapi.RoverReadings
+	(*StatusResponse)(nil),       // 22: roveapi.StatusResponse
 }
 var file_roveapi_roveapi_proto_depIdxs = []int32{
-	8,  // 0: roveapi.RegisterResponse.account:type_name -> roveapi.Account
+	9,  // 0: roveapi.RegisterResponse.account:type_name -> roveapi.Account
 	0,  // 1: roveapi.Command.command:type_name -> roveapi.CommandType
-	1,  // 2: roveapi.Command.turn:type_name -> roveapi.Bearing
-	8,  // 3: roveapi.CommandRequest.account:type_name -> roveapi.Account
-	10, // 4: roveapi.CommandRequest.commands:type_name -> roveapi.Command
-	8,  // 5: roveapi.RadarRequest.account:type_name -> roveapi.Account
-	3,  // 6: roveapi.RadarResponse.tiles:type_name -> roveapi.Tile
-	2,  // 7: roveapi.RadarResponse.objects:type_name -> roveapi.Object
-	8,  // 8: roveapi.StatusRequest.account:type_name -> roveapi.Account
-	1,  // 9: roveapi.RoverStatus.bearing:type_name -> roveapi.Bearing
-	4,  // 10: roveapi.RoverStatus.sailPosition:type_name -> roveapi.SailPosition
-	10, // 11: roveapi.RoverStatus.queuedCommands:type_name -> roveapi.Command
-	17, // 12: roveapi.RoverReadings.position:type_name -> roveapi.Vector
-	1,  // 13: roveapi.RoverReadings.wind:type_name -> roveapi.Bearing
-	16, // 14: roveapi.RoverReadings.logs:type_name -> roveapi.Log
-	18, // 15: roveapi.StatusResponse.spec:type_name -> roveapi.RoverSpecifications
-	19, // 16: roveapi.StatusResponse.status:type_name -> roveapi.RoverStatus
-	20, // 17: roveapi.StatusResponse.readings:type_name -> roveapi.RoverReadings
-	5,  // 18: roveapi.Rove.ServerStatus:input_type -> roveapi.ServerStatusRequest
-	7,  // 19: roveapi.Rove.Register:input_type -> roveapi.RegisterRequest
-	11, // 20: roveapi.Rove.Command:input_type -> roveapi.CommandRequest
-	13, // 21: roveapi.Rove.Radar:input_type -> roveapi.RadarRequest
-	15, // 22: roveapi.Rove.Status:input_type -> roveapi.StatusRequest
-	6,  // 23: roveapi.Rove.ServerStatus:output_type -> roveapi.ServerStatusResponse
-	9,  // 24: roveapi.Rove.Register:output_type -> roveapi.RegisterResponse
-	12, // 25: roveapi.Rove.Command:output_type -> roveapi.CommandResponse
-	14, // 26: roveapi.Rove.Radar:output_type -> roveapi.RadarResponse
-	21, // 27: roveapi.Rove.Status:output_type -> roveapi.StatusResponse
-	23, // [23:28] is the sub-list for method output_type
-	18, // [18:23] is the sub-list for method input_type
-	18, // [18:18] is the sub-list for extension type_name
-	18, // [18:18] is the sub-list for extension extendee
-	0,  // [0:18] is the sub-list for field type_name
+	1,  // 2: roveapi.Command.bearing:type_name -> roveapi.Bearing
+	2,  // 3: roveapi.Command.upgrade:type_name -> roveapi.RoverUpgrade
+	9,  // 4: roveapi.CommandRequest.account:type_name -> roveapi.Account
+	11, // 5: roveapi.CommandRequest.commands:type_name -> roveapi.Command
+	9,  // 6: roveapi.RadarRequest.account:type_name -> roveapi.Account
+	4,  // 7: roveapi.RadarResponse.tiles:type_name -> roveapi.Tile
+	3,  // 8: roveapi.RadarResponse.objects:type_name -> roveapi.Object
+	9,  // 9: roveapi.StatusRequest.account:type_name -> roveapi.Account
+	1,  // 10: roveapi.RoverStatus.bearing:type_name -> roveapi.Bearing
+	5,  // 11: roveapi.RoverStatus.sailPosition:type_name -> roveapi.SailPosition
+	11, // 12: roveapi.RoverStatus.queuedCommands:type_name -> roveapi.Command
+	18, // 13: roveapi.RoverReadings.position:type_name -> roveapi.Vector
+	1,  // 14: roveapi.RoverReadings.wind:type_name -> roveapi.Bearing
+	17, // 15: roveapi.RoverReadings.logs:type_name -> roveapi.Log
+	19, // 16: roveapi.StatusResponse.spec:type_name -> roveapi.RoverSpecifications
+	20, // 17: roveapi.StatusResponse.status:type_name -> roveapi.RoverStatus
+	21, // 18: roveapi.StatusResponse.readings:type_name -> roveapi.RoverReadings
+	6,  // 19: roveapi.Rove.ServerStatus:input_type -> roveapi.ServerStatusRequest
+	8,  // 20: roveapi.Rove.Register:input_type -> roveapi.RegisterRequest
+	12, // 21: roveapi.Rove.Command:input_type -> roveapi.CommandRequest
+	14, // 22: roveapi.Rove.Radar:input_type -> roveapi.RadarRequest
+	16, // 23: roveapi.Rove.Status:input_type -> roveapi.StatusRequest
+	7,  // 24: roveapi.Rove.ServerStatus:output_type -> roveapi.ServerStatusResponse
+	10, // 25: roveapi.Rove.Register:output_type -> roveapi.RegisterResponse
+	13, // 26: roveapi.Rove.Command:output_type -> roveapi.CommandResponse
+	15, // 27: roveapi.Rove.Radar:output_type -> roveapi.RadarResponse
+	22, // 28: roveapi.Rove.Status:output_type -> roveapi.StatusResponse
+	24, // [24:29] is the sub-list for method output_type
+	19, // [19:24] is the sub-list for method input_type
+	19, // [19:19] is the sub-list for extension type_name
+	19, // [19:19] is the sub-list for extension extendee
+	0,  // [0:19] is the sub-list for field type_name
 }
 
 func init() { file_roveapi_roveapi_proto_init() }
@@ -1824,7 +1937,7 @@ func file_roveapi_roveapi_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_roveapi_roveapi_proto_rawDesc,
-			NumEnums:      5,
+			NumEnums:      6,
 			NumMessages:   17,
 			NumExtensions: 0,
 			NumServices:   1,

proto/roveapi/roveapi.proto

@@ -89,16 +89,24 @@ message RegisterResponse {
 // CommandType defines the type of a command to give to the rover
 enum CommandType {
   none = 0;
+  // Waits before performing the next command
+  wait = 1;
   // Toggles the sails, either catching the wind, or charging from the sun
-  toggle = 1;
-  // Turns the rover in the specified bearing, requires data
-  turn = 2;
+  toggle = 2;
+  // Turns the rover in the specified bearing (requires bearing)
+  turn = 3;
   // Stashes item at current location in rover inventory
-  stash = 3;
+  stash = 4;
   // Repairs the rover using an inventory object
-  repair = 4;
-  // Broadcasts a message to nearby rovers, requires data
-  broadcast = 5;
+  repair = 5;
+  // Broadcasts a message to nearby rovers (requires data)
+  broadcast = 6;
+  // Salvages a neighboring dormant rover for parts
+  salvage = 7;
+  // Transfers remote control into dormant rover
+  transfer = 8;
+  // Upgrades a chosen rover specification using 5 rover parts
+  upgrade = 9;
 }
 
 // Bearing represents a compass direction
@@ -115,17 +123,32 @@ enum Bearing {
   NorthWest = 8;
 }
 
+// Describes the type of upgrade
+enum RoverUpgrade {
+  RoverUpgradeUnknown = 0;
+  Range = 1;
+  Capacity = 2;
+  MaximumIntegrity = 3;
+  MaximumCharge = 4;
+}
+
 // Command is a single command for a rover
 message Command {
   // The command type
   CommandType command = 1;
 
-  // A simple message, must be composed of printable ASCII glyphs (32-126)
-  // maximum of three characters
-  bytes broadcast = 2;
+  // The number of times to repeat the command after the first
+  int32 repeat = 2;
 
-  // The bearing for the rover to turn to
-  Bearing turn = 3;
+  // broadcast - a simple message, must be composed of up to 3 printable ASCII
+  // glyphs (32-126)
+  bytes data = 3;
+
+  // move - the bearing for the rover to turn to
+  Bearing bearing = 4;
+
+  // upgrade - the upgrade to apply to the rover
+  RoverUpgrade upgrade = 5;
 }
 
 // CommandRequest describes a set of commands to be requested for the rover
@@ -160,6 +183,10 @@ enum Object {
 
   // RockLarge is a large blocking rock
   RockLarge = 4;
+
+  // RoverParts is one unit of rover parts, used for repairing and fixing the
+  // rover
+  RoverParts = 5;
 }
 
 enum Tile {