From 2c1bb8077931bc75b678d0b08aa25240d3b6e1a5 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Thu, 23 Jul 2020 19:01:16 +0100
Subject: [PATCH 01/18] Add salvage command

	Slight refactor to re-use command variables

	Also fixes the cmdline client turn command
---
 cmd/rove/main.go            |   8 +-
 pkg/rove/command_test.go    |   4 +-
 pkg/rove/world.go           |  12 +-
 proto/roveapi/roveapi.pb.go | 481 +++++++++++++++++++++---------------
 proto/roveapi/roveapi.proto |  26 +-
 5 files changed, 306 insertions(+), 225 deletions(-)

diff --git a/cmd/rove/main.go b/cmd/rove/main.go
index 01e16ae..97a7a24 100644
--- a/cmd/rove/main.go
+++ b/cmd/rove/main.go
@@ -243,8 +243,8 @@ func InnerMain(command string, args ...string) error {
 				}
 				commands = append(commands,
 					&roveapi.Command{
-						Command:   roveapi.CommandType_broadcast,
-						Broadcast: []byte(args[i]),
+						Command: roveapi.CommandType_turn,
+						Bearing: b,
 					},
 				)
 			case "broadcast":
@@ -256,8 +256,8 @@ func InnerMain(command string, args ...string) error {
 				}
 				commands = append(commands,
 					&roveapi.Command{
-						Command:   roveapi.CommandType_broadcast,
-						Broadcast: []byte(args[i]),
+						Command: roveapi.CommandType_broadcast,
+						Data:    []byte(args[i]),
 					},
 				)
 			default:
diff --git a/pkg/rove/command_test.go b/pkg/rove/command_test.go
index d73b25c..8f4dd36 100644
--- a/pkg/rove/command_test.go
+++ b/pkg/rove/command_test.go
@@ -39,7 +39,7 @@ func TestCommand_Turn(t *testing.T) {
 	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()
 
@@ -122,7 +122,7 @@ func TestCommand_Broadcast(t *testing.T) {
 	assert.NoError(t, err)
 
 	// Enqueue the broadcast and tick
-	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_broadcast, Broadcast: []byte("ABC")})
+	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_broadcast, Data: []byte("ABC")})
 	assert.NoError(t, err)
 	w.Tick()
 
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index a81cf05..50348dc 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -435,16 +435,16 @@ 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_toggle:
@@ -569,12 +569,12 @@ func (w *World) ExecuteCommand(c *roveapi.Command, rover string) (err error) {
 		}
 
 	case roveapi.CommandType_broadcast:
-		if err := w.RoverBroadcast(rover, c.GetBroadcast()); err != nil {
+		if err := w.RoverBroadcast(rover, c.GetData()); err != nil {
 			return err
 		}
 
 	case roveapi.CommandType_turn:
-		if _, err := w.RoverTurn(rover, c.GetTurn()); err != nil {
+		if _, err := w.RoverTurn(rover, c.GetBearing()); err != nil {
 			return err
 		}
 
diff --git a/proto/roveapi/roveapi.pb.go b/proto/roveapi/roveapi.pb.go
index d5f0a46..c5e458c 100644
--- a/proto/roveapi/roveapi.pb.go
+++ b/proto/roveapi/roveapi.pb.go
@@ -41,14 +41,16 @@ const (
 	CommandType_none CommandType = 0
 	// 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
+	// Turns the rover in the specified bearing (requires bearing)
 	CommandType_turn CommandType = 2
 	// Stashes item at current location in rover inventory
 	CommandType_stash CommandType = 3
 	// Repairs the rover using an inventory object
 	CommandType_repair CommandType = 4
-	// Broadcasts a message to nearby rovers, requires data
+	// Broadcasts a message to nearby rovers (requires data)
 	CommandType_broadcast CommandType = 5
+	// Salvages a neighboring dormant rover for parts (requres bearing and salvage)
+	CommandType_salvage CommandType = 6
 )
 
 // Enum value maps for CommandType.
@@ -60,6 +62,7 @@ var (
 		3: "stash",
 		4: "repair",
 		5: "broadcast",
+		6: "salvage",
 	}
 	CommandType_value = map[string]int32{
 		"none":      0,
@@ -68,6 +71,7 @@ var (
 		"stash":     3,
 		"repair":    4,
 		"broadcast": 5,
+		"salvage":   6,
 	}
 )
 
@@ -167,6 +171,53 @@ func (Bearing) EnumDescriptor() ([]byte, []int) {
 	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{1}
 }
 
+type SalvageType int32
+
+const (
+	SalvageType_SalvageUnknown SalvageType = 0
+	// Salvage a nearby rover for parts
+	SalvageType_SalvageParts SalvageType = 1
+)
+
+// Enum value maps for SalvageType.
+var (
+	SalvageType_name = map[int32]string{
+		0: "SalvageUnknown",
+		1: "SalvageParts",
+	}
+	SalvageType_value = map[string]int32{
+		"SalvageUnknown": 0,
+		"SalvageParts":   1,
+	}
+)
+
+func (x SalvageType) Enum() *SalvageType {
+	p := new(SalvageType)
+	*p = x
+	return p
+}
+
+func (x SalvageType) String() string {
+	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
+}
+
+func (SalvageType) Descriptor() protoreflect.EnumDescriptor {
+	return file_roveapi_roveapi_proto_enumTypes[2].Descriptor()
+}
+
+func (SalvageType) Type() protoreflect.EnumType {
+	return &file_roveapi_roveapi_proto_enumTypes[2]
+}
+
+func (x SalvageType) Number() protoreflect.EnumNumber {
+	return protoreflect.EnumNumber(x)
+}
+
+// Deprecated: Use SalvageType.Descriptor instead.
+func (SalvageType) EnumDescriptor() ([]byte, []int) {
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{2}
+}
+
 // Types of objects
 type Object int32
 
@@ -212,11 +263,11 @@ 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 +276,7 @@ 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 +319,11 @@ 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 +332,7 @@ 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 +371,11 @@ 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 +384,7 @@ 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 +675,13 @@ 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"`
+	// broadcast - a simple message, must be composed of up to 3 printable ASCII glyphs (32-126)
+	Data []byte `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
+	// move - the bearing for the rover to turn to
+	// salvage - the direction of the rover
+	Bearing Bearing `protobuf:"varint,3,opt,name=bearing,proto3,enum=roveapi.Bearing" json:"bearing,omitempty"`
+	// salvage - the type of salvage to execute
+	Salvage SalvageType `protobuf:"varint,4,opt,name=salvage,proto3,enum=roveapi.SalvageType" json:"salvage,omitempty"`
 }
 
 func (x *Command) Reset() {
@@ -670,20 +723,27 @@ func (x *Command) GetCommand() CommandType {
 	return CommandType_none
 }
 
-func (x *Command) GetBroadcast() []byte {
+func (x *Command) GetData() []byte {
 	if x != nil {
-		return x.Broadcast
+		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) GetSalvage() SalvageType {
+	if x != nil {
+		return x.Salvage
+	}
+	return SalvageType_SalvageUnknown
+}
+
 // CommandRequest describes a set of commands to be requested for the rover
 type CommandRequest struct {
 	state         protoimpl.MessageState
@@ -1397,141 +1457,148 @@ var file_roveapi_roveapi_proto_rawDesc = []byte{
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 }
 
 var (
@@ -1546,66 +1613,68 @@ 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
+	(SalvageType)(0),             // 2: roveapi.SalvageType
+	(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.salvage:type_name -> roveapi.SalvageType
+	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 +1893,7 @@ 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,
diff --git a/proto/roveapi/roveapi.proto b/proto/roveapi/roveapi.proto
index cc7826a..2d8917e 100644
--- a/proto/roveapi/roveapi.proto
+++ b/proto/roveapi/roveapi.proto
@@ -91,14 +91,16 @@ enum CommandType {
   none = 0;
   // Toggles the sails, either catching the wind, or charging from the sun
   toggle = 1;
-  // Turns the rover in the specified bearing, requires data
+  // Turns the rover in the specified bearing (requires bearing)
   turn = 2;
   // Stashes item at current location in rover inventory
   stash = 3;
   // Repairs the rover using an inventory object
   repair = 4;
-  // Broadcasts a message to nearby rovers, requires data
+  // Broadcasts a message to nearby rovers (requires data)
   broadcast = 5;
+  // Salvages a neighboring dormant rover for parts (requres bearing and salvage)
+  salvage = 6;
 }
 
 // Bearing represents a compass direction
@@ -115,17 +117,27 @@ enum Bearing {
   NorthWest = 8;
 }
 
+enum SalvageType {
+  SalvageUnknown = 0;
+
+  // Salvage a nearby rover for parts
+  SalvageParts = 1;
+}
+
 // 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;
+  // broadcast - a simple message, must be composed of up to 3 printable ASCII glyphs (32-126)
+  bytes data = 2;
 
-  // The bearing for the rover to turn to
-  Bearing turn = 3;
+  // move - the bearing for the rover to turn to
+  // salvage - the direction of the rover
+  Bearing bearing = 3;
+
+  // salvage - the type of salvage to execute
+  SalvageType salvage = 4;
 }
 
 // CommandRequest describes a set of commands to be requested for the rover

From ce6e10afbb0deb73601b07ff5640a23453d7abe0 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:08:03 +0100
Subject: [PATCH 02/18] Add salvage command to main.go man page

---
 cmd/rove/main.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cmd/rove/main.go b/cmd/rove/main.go
index 97a7a24..aaca561 100644
--- a/cmd/rove/main.go
+++ b/cmd/rove/main.go
@@ -37,6 +37,7 @@ func printUsage() {
 	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, "\tsalvage                     uses an inventory object to repair the rover")
 	fmt.Fprintln(os.Stderr, "\nEnvironment")
 	fmt.Fprintln(os.Stderr, "\tROVE_USER_DATA             path to user data, defaults to "+defaultDataPath)
 }

From 2f1ccdfdb91fa2676e417e376b127afae0946a18 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:08:39 +0100
Subject: [PATCH 03/18] Make repair require rover parts

---
 pkg/rove/command_test.go    |   4 +-
 pkg/rove/objects.go         |   1 +
 pkg/rove/world.go           |  23 +-
 pkg/rove/world_test.go      |   8 +-
 proto/roveapi/roveapi.pb.go | 461 ++++++++++++++++--------------------
 proto/roveapi/roveapi.proto |  15 +-
 6 files changed, 230 insertions(+), 282 deletions(-)

diff --git a/pkg/rove/command_test.go b/pkg/rove/command_test.go
index 8f4dd36..9ca2748 100644
--- a/pkg/rove/command_test.go
+++ b/pkg/rove/command_test.go
@@ -99,10 +99,10 @@ func TestCommand_Repair(t *testing.T) {
 	assert.Equal(t, info.MaximumIntegrity-1, info.Integrity)
 
 	// Stash a repair object
-	w.Atlas.SetObject(info.Pos, Object{Type: roveapi.Object_RockSmall})
+	w.Atlas.SetObject(info.Pos, Object{Type: roveapi.Object_RoverParts})
 	obj, err := w.RoverStash(name)
 	assert.NoError(t, err)
-	assert.Equal(t, roveapi.Object_RockSmall, obj)
+	assert.Equal(t, roveapi.Object_RoverParts, obj)
 
 	// Enqueue the repair and tick
 	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_repair})
diff --git a/pkg/rove/objects.go b/pkg/rove/objects.go
index f1ce227..d5fd237 100644
--- a/pkg/rove/objects.go
+++ b/pkg/rove/objects.go
@@ -33,6 +33,7 @@ func (o *Object) IsBlocking() bool {
 func (o *Object) IsStashable() bool {
 	var stashable = [...]roveapi.Object{
 		roveapi.Object_RockSmall,
+		roveapi.Object_RoverParts,
 	}
 
 	for _, t := range stashable {
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index 50348dc..de0bcae 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -352,11 +352,24 @@ 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
diff --git a/pkg/rove/world_test.go b/pkg/rove/world_test.go
index db9fcb6..53be582 100644
--- a/pkg/rove/world_test.go
+++ b/pkg/rove/world_test.go
@@ -248,10 +248,10 @@ func TestWorld_RoverRepair(t *testing.T) {
 	assert.NoError(t, err, "couldn't get rover info")
 
 	// Pick up something to repair with
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RockSmall})
+	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RoverParts})
 	o, err := world.RoverStash(a)
 	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_RockSmall, o, "Failed to get correct object")
+	assert.Equal(t, roveapi.Object_RoverParts, o, "Failed to get correct object")
 
 	world.Atlas.SetObject(maths.Vector{X: 0.0, Y: 1.0}, Object{Type: roveapi.Object_RockLarge})
 
@@ -273,10 +273,10 @@ func TestWorld_RoverRepair(t *testing.T) {
 	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})
+	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_RoverParts})
 	o, err = world.RoverStash(a)
 	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_RockSmall, o, "Failed to get correct object")
+	assert.Equal(t, roveapi.Object_RoverParts, o, "Failed to get correct object")
 
 	err = world.ExecuteCommand(&roveapi.Command{Command: roveapi.CommandType_repair}, a)
 	assert.NoError(t, err, "Failed to repair rover")
diff --git a/proto/roveapi/roveapi.pb.go b/proto/roveapi/roveapi.pb.go
index c5e458c..e86ab46 100644
--- a/proto/roveapi/roveapi.pb.go
+++ b/proto/roveapi/roveapi.pb.go
@@ -49,7 +49,7 @@ const (
 	CommandType_repair CommandType = 4
 	// Broadcasts a message to nearby rovers (requires data)
 	CommandType_broadcast CommandType = 5
-	// Salvages a neighboring dormant rover for parts (requres bearing and salvage)
+	// Salvages a neighboring dormant rover for parts
 	CommandType_salvage CommandType = 6
 )
 
@@ -171,53 +171,6 @@ func (Bearing) EnumDescriptor() ([]byte, []int) {
 	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{1}
 }
 
-type SalvageType int32
-
-const (
-	SalvageType_SalvageUnknown SalvageType = 0
-	// Salvage a nearby rover for parts
-	SalvageType_SalvageParts SalvageType = 1
-)
-
-// Enum value maps for SalvageType.
-var (
-	SalvageType_name = map[int32]string{
-		0: "SalvageUnknown",
-		1: "SalvageParts",
-	}
-	SalvageType_value = map[string]int32{
-		"SalvageUnknown": 0,
-		"SalvageParts":   1,
-	}
-)
-
-func (x SalvageType) Enum() *SalvageType {
-	p := new(SalvageType)
-	*p = x
-	return p
-}
-
-func (x SalvageType) String() string {
-	return protoimpl.X.EnumStringOf(x.Descriptor(), protoreflect.EnumNumber(x))
-}
-
-func (SalvageType) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[2].Descriptor()
-}
-
-func (SalvageType) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[2]
-}
-
-func (x SalvageType) Number() protoreflect.EnumNumber {
-	return protoreflect.EnumNumber(x)
-}
-
-// Deprecated: Use SalvageType.Descriptor instead.
-func (SalvageType) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{2}
-}
-
 // Types of objects
 type Object int32
 
@@ -232,6 +185,8 @@ 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.
@@ -242,6 +197,7 @@ var (
 		2: "RoverDormant",
 		3: "RockSmall",
 		4: "RockLarge",
+		5: "RoverParts",
 	}
 	Object_value = map[string]int32{
 		"ObjectUnknown": 0,
@@ -249,6 +205,7 @@ var (
 		"RoverDormant":  2,
 		"RockSmall":     3,
 		"RockLarge":     4,
+		"RoverParts":    5,
 	}
 )
 
@@ -263,11 +220,11 @@ func (x Object) String() string {
 }
 
 func (Object) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[3].Descriptor()
+	return file_roveapi_roveapi_proto_enumTypes[2].Descriptor()
 }
 
 func (Object) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[3]
+	return &file_roveapi_roveapi_proto_enumTypes[2]
 }
 
 func (x Object) Number() protoreflect.EnumNumber {
@@ -276,7 +233,7 @@ func (x Object) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use Object.Descriptor instead.
 func (Object) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{3}
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{2}
 }
 
 type Tile int32
@@ -319,11 +276,11 @@ func (x Tile) String() string {
 }
 
 func (Tile) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[4].Descriptor()
+	return file_roveapi_roveapi_proto_enumTypes[3].Descriptor()
 }
 
 func (Tile) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[4]
+	return &file_roveapi_roveapi_proto_enumTypes[3]
 }
 
 func (x Tile) Number() protoreflect.EnumNumber {
@@ -332,7 +289,7 @@ func (x Tile) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use Tile.Descriptor instead.
 func (Tile) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{4}
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{3}
 }
 
 // SailPosition represents the position of the sola sail
@@ -371,11 +328,11 @@ func (x SailPosition) String() string {
 }
 
 func (SailPosition) Descriptor() protoreflect.EnumDescriptor {
-	return file_roveapi_roveapi_proto_enumTypes[5].Descriptor()
+	return file_roveapi_roveapi_proto_enumTypes[4].Descriptor()
 }
 
 func (SailPosition) Type() protoreflect.EnumType {
-	return &file_roveapi_roveapi_proto_enumTypes[5]
+	return &file_roveapi_roveapi_proto_enumTypes[4]
 }
 
 func (x SailPosition) Number() protoreflect.EnumNumber {
@@ -384,7 +341,7 @@ func (x SailPosition) Number() protoreflect.EnumNumber {
 
 // Deprecated: Use SailPosition.Descriptor instead.
 func (SailPosition) EnumDescriptor() ([]byte, []int) {
-	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{5}
+	return file_roveapi_roveapi_proto_rawDescGZIP(), []int{4}
 }
 
 // ServerStatusRequest is an empty placeholder
@@ -680,8 +637,6 @@ type Command struct {
 	// move - the bearing for the rover to turn to
 	// salvage - the direction of the rover
 	Bearing Bearing `protobuf:"varint,3,opt,name=bearing,proto3,enum=roveapi.Bearing" json:"bearing,omitempty"`
-	// salvage - the type of salvage to execute
-	Salvage SalvageType `protobuf:"varint,4,opt,name=salvage,proto3,enum=roveapi.SalvageType" json:"salvage,omitempty"`
 }
 
 func (x *Command) Reset() {
@@ -737,13 +692,6 @@ func (x *Command) GetBearing() Bearing {
 	return Bearing_BearingUnknown
 }
 
-func (x *Command) GetSalvage() SalvageType {
-	if x != nil {
-		return x.Salvage
-	}
-	return SalvageType_SalvageUnknown
-}
-
 // CommandRequest describes a set of commands to be requested for the rover
 type CommandRequest struct {
 	state         protoimpl.MessageState
@@ -1457,148 +1405,143 @@ var file_roveapi_roveapi_proto_rawDesc = []byte{
 	0x69, 0x73, 0x74, 0x65, 0x72, 0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x2a, 0x0a,
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+	0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x6d, 0x64, 0x69, 0x6c, 0x75, 0x7a, 0x2f, 0x72, 0x6f,
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+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -1613,68 +1556,66 @@ func file_roveapi_roveapi_proto_rawDescGZIP() []byte {
 	return file_roveapi_roveapi_proto_rawDescData
 }
 
-var file_roveapi_roveapi_proto_enumTypes = make([]protoimpl.EnumInfo, 6)
+var file_roveapi_roveapi_proto_enumTypes = make([]protoimpl.EnumInfo, 5)
 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
-	(SalvageType)(0),             // 2: roveapi.SalvageType
-	(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
+	(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
 }
 var file_roveapi_roveapi_proto_depIdxs = []int32{
-	9,  // 0: roveapi.RegisterResponse.account:type_name -> roveapi.Account
+	8,  // 0: roveapi.RegisterResponse.account:type_name -> roveapi.Account
 	0,  // 1: roveapi.Command.command:type_name -> roveapi.CommandType
 	1,  // 2: roveapi.Command.bearing:type_name -> roveapi.Bearing
-	2,  // 3: roveapi.Command.salvage:type_name -> roveapi.SalvageType
-	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
+	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
 }
 
 func init() { file_roveapi_roveapi_proto_init() }
@@ -1893,7 +1834,7 @@ func file_roveapi_roveapi_proto_init() {
 		File: protoimpl.DescBuilder{
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_roveapi_roveapi_proto_rawDesc,
-			NumEnums:      6,
+			NumEnums:      5,
 			NumMessages:   17,
 			NumExtensions: 0,
 			NumServices:   1,
diff --git a/proto/roveapi/roveapi.proto b/proto/roveapi/roveapi.proto
index 2d8917e..6b9515c 100644
--- a/proto/roveapi/roveapi.proto
+++ b/proto/roveapi/roveapi.proto
@@ -99,7 +99,7 @@ enum CommandType {
   repair = 4;
   // Broadcasts a message to nearby rovers (requires data)
   broadcast = 5;
-  // Salvages a neighboring dormant rover for parts (requres bearing and salvage)
+  // Salvages a neighboring dormant rover for parts
   salvage = 6;
 }
 
@@ -117,13 +117,6 @@ enum Bearing {
   NorthWest = 8;
 }
 
-enum SalvageType {
-  SalvageUnknown = 0;
-
-  // Salvage a nearby rover for parts
-  SalvageParts = 1;
-}
-
 // Command is a single command for a rover
 message Command {
   // The command type
@@ -135,9 +128,6 @@ message Command {
   // move - the bearing for the rover to turn to
   // salvage - the direction of the rover
   Bearing bearing = 3;
-
-  // salvage - the type of salvage to execute
-  SalvageType salvage = 4;
 }
 
 // CommandRequest describes a set of commands to be requested for the rover
@@ -172,6 +162,9 @@ 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 {

From 524487ce149ddffb4ec39fb95950acf764e8f84c Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:27:54 +0100
Subject: [PATCH 04/18] Stop the dormant rover from being a blocking object

---
 pkg/rove/objects.go | 1 -
 1 file changed, 1 deletion(-)

diff --git a/pkg/rove/objects.go b/pkg/rove/objects.go
index d5fd237..df10453 100644
--- a/pkg/rove/objects.go
+++ b/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,
 	}
 

From 7cccb4394f7eb0583ba603d34e1097e002149156 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:28:44 +0100
Subject: [PATCH 05/18] Fix the help text comment

---
 cmd/rove/main.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cmd/rove/main.go b/cmd/rove/main.go
index aaca561..b3a7ed6 100644
--- a/cmd/rove/main.go
+++ b/cmd/rove/main.go
@@ -37,7 +37,7 @@ func printUsage() {
 	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, "\tsalvage                     uses an inventory object to repair the rover")
+	fmt.Fprintln(os.Stderr, "\tsalvage                    salvages a dormant rover for parts")
 	fmt.Fprintln(os.Stderr, "\nEnvironment")
 	fmt.Fprintln(os.Stderr, "\tROVE_USER_DATA             path to user data, defaults to "+defaultDataPath)
 }

From c321f88d962fcdba8de9a9e8950f6c31f8f702b5 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:39:14 +0100
Subject: [PATCH 06/18] Add code for salvage command

---
 pkg/rove/command_test.go | 28 ++++++++++++++++++++++++
 pkg/rove/world.go        | 46 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 74 insertions(+)

diff --git a/pkg/rove/command_test.go b/pkg/rove/command_test.go
index 9ca2748..9a8a35a 100644
--- a/pkg/rove/command_test.go
+++ b/pkg/rove/command_test.go
@@ -131,6 +131,34 @@ func TestCommand_Broadcast(t *testing.T) {
 	assert.Contains(t, info.Logs[len(info.Logs)-1].Text, "ABC")
 }
 
+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_Invalid(t *testing.T) {
 	w := NewWorld(8)
 	name, err := w.SpawnRover()
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index de0bcae..b18f23e 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -300,6 +300,46 @@ 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
+}
+
 // RoverToggle will toggle the sail position
 func (w *World) RoverToggle(rover string) (roveapi.SailPosition, error) {
 	w.worldMutex.Lock()
@@ -463,6 +503,7 @@ func (w *World) Enqueue(rover string, commands ...*roveapi.Command) error {
 		case roveapi.CommandType_toggle:
 		case roveapi.CommandType_stash:
 		case roveapi.CommandType_repair:
+		case roveapi.CommandType_salvage:
 			// Nothing to verify
 		default:
 			return fmt.Errorf("unknown command: %s", c.Command)
@@ -591,6 +632,11 @@ func (w *World) ExecuteCommand(c *roveapi.Command, rover string) (err error) {
 			return err
 		}
 
+	case roveapi.CommandType_salvage:
+		if _, err := w.RoverSalvage(rover); err != nil {
+			return err
+		}
+
 	default:
 		return fmt.Errorf("unknown command: %s", c.Command)
 	}

From be36f0631b830f849ef0148e21ef38576e196da8 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:39:25 +0100
Subject: [PATCH 07/18] Add logs for failed stashes

---
 pkg/rove/world.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index b18f23e..a500287 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -280,11 +280,13 @@ 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--

From b0ff3eb6ea58201a657a493be7dd36c4a00a4182 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:39:33 +0100
Subject: [PATCH 08/18] Remove redundant tests (covered in command_tests)

---
 pkg/rove/world_test.go | 130 -----------------------------------------
 1 file changed, 130 deletions(-)

diff --git a/pkg/rove/world_test.go b/pkg/rove/world_test.go
index 53be582..430d571 100644
--- a/pkg/rove/world_test.go
+++ b/pkg/rove/world_test.go
@@ -128,79 +128,6 @@ func TestWorld_RadarFromRover(t *testing.T) {
 	assert.Equal(t, objs1, objs2)
 }
 
-func TestWorld_RoverStash(t *testing.T) {
-	world := NewWorld(2)
-	a, err := world.SpawnRover()
-	assert.NoError(t, err)
-
-	pos := maths.Vector{
-		X: 0.0,
-		Y: 0.0,
-	}
-
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_ObjectUnknown})
-	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()
@@ -229,63 +156,6 @@ func TestWorld_RoverDamage(t *testing.T) {
 	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,
-	}
-
-	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_ObjectUnknown})
-
-	err = world.WarpRover(a, pos)
-	assert.NoError(t, err, "Failed to set position for rover")
-
-	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_RoverParts})
-	o, err := world.RoverStash(a)
-	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_RoverParts, 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_RoverParts})
-	o, err = world.RoverStash(a)
-	assert.NoError(t, err, "Failed to stash")
-	assert.Equal(t, roveapi.Object_RoverParts, 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")
-}
-
 func TestWorld_Daytime(t *testing.T) {
 	world := NewWorld(1)
 

From edd3e5a6cbc3855ecd089c950e964ab3c70fce41 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:42:34 +0100
Subject: [PATCH 09/18] Fix test by removing object before warping rover

---
 pkg/rove/world_test.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkg/rove/world_test.go b/pkg/rove/world_test.go
index 430d571..e1fa700 100644
--- a/pkg/rove/world_test.go
+++ b/pkg/rove/world_test.go
@@ -138,6 +138,7 @@ func TestWorld_RoverDamage(t *testing.T) {
 		Y: 0.0,
 	}
 
+	world.Atlas.SetObject(pos, Object{Type: roveapi.Object_ObjectUnknown})
 	err = world.WarpRover(a, pos)
 	assert.NoError(t, err, "Failed to set position for rover")
 

From 5b2ea533f41081564724025b7fe7c8891d1e5819 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 19:46:32 +0100
Subject: [PATCH 10/18] Remove incorrect proto comment

---
 proto/roveapi/roveapi.proto | 1 -
 1 file changed, 1 deletion(-)

diff --git a/proto/roveapi/roveapi.proto b/proto/roveapi/roveapi.proto
index 6b9515c..7acedac 100644
--- a/proto/roveapi/roveapi.proto
+++ b/proto/roveapi/roveapi.proto
@@ -126,7 +126,6 @@ message Command {
   bytes data = 2;
 
   // move - the bearing for the rover to turn to
-  // salvage - the direction of the rover
   Bearing bearing = 3;
 }
 

From 1e4d642038660ceda198bc769c22d688efe5b7a1 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 20:01:35 +0100
Subject: [PATCH 11/18] Add rover transfer command and implementation

	Need to swap the accounts
---
 pkg/rove/world.go           |  54 +++++++++++++++++++
 proto/roveapi/roveapi.pb.go | 104 +++++++++++++++++++-----------------
 proto/roveapi/roveapi.proto |   2 +
 3 files changed, 110 insertions(+), 50 deletions(-)

diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index a500287..afe7605 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -1,6 +1,7 @@
 package rove
 
 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"math/rand"
@@ -342,6 +343,53 @@ func (w *World) RoverSalvage(rover string) (roveapi.Object, error) {
 	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)
+
+	// Marshal old rover
+	oldRoverData, err := json.Marshal(oldRover)
+	if err != nil {
+		return "", err
+	}
+
+	// Add this new rover to tracking
+	w.Rovers[newRover.Name] = &newRover
+
+	// TODO: Swap account rover to the dormant one
+
+	// Place the old rover into the world
+	w.Atlas.SetObject(oldRover.Pos, Object{Type: roveapi.Object_RoverDormant, Data: oldRoverData})
+
+	// Remove old rover from current tracking
+	delete(w.Rovers, oldRover.Name)
+
+	return newRover.Name, nil
+}
+
 // RoverToggle will toggle the sail position
 func (w *World) RoverToggle(rover string) (roveapi.SailPosition, error) {
 	w.worldMutex.Lock()
@@ -506,6 +554,7 @@ func (w *World) Enqueue(rover string, commands ...*roveapi.Command) error {
 		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)
@@ -639,6 +688,11 @@ func (w *World) ExecuteCommand(c *roveapi.Command, rover string) (err error) {
 			return err
 		}
 
+	case roveapi.CommandType_transfer:
+		if _, err := w.RoverTransfer(rover); err != nil {
+			return err
+		}
+
 	default:
 		return fmt.Errorf("unknown command: %s", c.Command)
 	}
diff --git a/proto/roveapi/roveapi.pb.go b/proto/roveapi/roveapi.pb.go
index e86ab46..cc6fe07 100644
--- a/proto/roveapi/roveapi.pb.go
+++ b/proto/roveapi/roveapi.pb.go
@@ -51,6 +51,8 @@ const (
 	CommandType_broadcast CommandType = 5
 	// Salvages a neighboring dormant rover for parts
 	CommandType_salvage CommandType = 6
+	// Transfers remote control into dormant rover
+	CommandType_transfer CommandType = 7
 )
 
 // Enum value maps for CommandType.
@@ -63,6 +65,7 @@ var (
 		4: "repair",
 		5: "broadcast",
 		6: "salvage",
+		7: "transfer",
 	}
 	CommandType_value = map[string]int32{
 		"none":      0,
@@ -72,6 +75,7 @@ var (
 		"repair":    4,
 		"broadcast": 5,
 		"salvage":   6,
+		"transfer":  7,
 	}
 )
 
@@ -635,7 +639,6 @@ type Command struct {
 	// broadcast - a simple message, must be composed of up to 3 printable ASCII glyphs (32-126)
 	Data []byte `protobuf:"bytes,2,opt,name=data,proto3" json:"data,omitempty"`
 	// move - the bearing for the rover to turn to
-	// salvage - the direction of the rover
 	Bearing Bearing `protobuf:"varint,3,opt,name=bearing,proto3,enum=roveapi.Bearing" json:"bearing,omitempty"`
 }
 
@@ -1487,61 +1490,62 @@ var file_roveapi_roveapi_proto_rawDesc = []byte{
 	0x06, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x12, 0x32, 0x0a, 0x08, 0x72, 0x65, 0x61, 0x64, 0x69,
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+	0x73, 0x52, 0x08, 0x72, 0x65, 0x61, 0x64, 0x69, 0x6e, 0x67, 0x73, 0x2a, 0x6e, 0x0a, 0x0b, 0x43,
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+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/proto/roveapi/roveapi.proto b/proto/roveapi/roveapi.proto
index 7acedac..5470e19 100644
--- a/proto/roveapi/roveapi.proto
+++ b/proto/roveapi/roveapi.proto
@@ -101,6 +101,8 @@ enum CommandType {
   broadcast = 5;
   // Salvages a neighboring dormant rover for parts
   salvage = 6;
+  // Transfers remote control into dormant rover
+  transfer = 7;
 }
 
 // Bearing represents a compass direction

From e840b3e47bc09e4e105aa2e89aae3fe62f15ed43 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 20:06:06 +0100
Subject: [PATCH 12/18] Move accountant into world

---
 cmd/rove-server/internal/routes.go                 | 14 +++++++-------
 cmd/rove-server/internal/server.go                 | 10 +++-------
 .../internal => pkg/accounts}/accounts.go          |  2 +-
 .../internal => pkg/accounts}/accounts_test.go     |  2 +-
 .../internal => pkg/accounts}/simpleAccountant.go  |  2 +-
 pkg/rove/world.go                                  |  5 +++++
 6 files changed, 18 insertions(+), 17 deletions(-)
 rename {cmd/rove-server/internal => pkg/accounts}/accounts.go (98%)
 rename {cmd/rove-server/internal => pkg/accounts}/accounts_test.go (98%)
 rename {cmd/rove-server/internal => pkg/accounts}/simpleAccountant.go (99%)

diff --git a/cmd/rove-server/internal/routes.go b/cmd/rove-server/internal/routes.go
index 86becd7..69dd820 100644
--- a/cmd/rove-server/internal/routes.go
+++ b/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
 	}
diff --git a/cmd/rove-server/internal/server.go b/cmd/rove-server/internal/server.go
index 786eb00..564656e 100644
--- a/cmd/rove-server/internal/server.go
+++ b/cmd/rove-server/internal/server.go
@@ -27,9 +27,6 @@ type Server struct {
 	// Internal state
 	world *rove.World
 
-	// Accountant
-	accountant Accountant
-
 	// gRPC server
 	netListener net.Listener
 	grpcServ    *grpc.Server
@@ -80,7 +77,6 @@ func NewServer(opts ...ServerOption) *Server {
 		persistence: EphemeralData,
 		schedule:    cron.New(),
 		world:       rove.NewWorld(32),
-		accountant:  NewSimpleAccountant(),
 	}
 
 	// Apply all options
@@ -188,7 +184,7 @@ 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 +196,7 @@ 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
 		}
 	}
@@ -214,7 +210,7 @@ func (s *Server) SpawnRoverForAccount(account string) (string, error) {
 		return "", err
 	}
 
-	err = s.accountant.AssignData(account, "rover", inst)
+	err = s.world.Accountant.AssignData(account, "rover", inst)
 	if err != nil {
 		log.Printf("Failed to assign rover to account, %s", err)
 
diff --git a/cmd/rove-server/internal/accounts.go b/pkg/accounts/accounts.go
similarity index 98%
rename from cmd/rove-server/internal/accounts.go
rename to pkg/accounts/accounts.go
index 9ae6db9..eb8637d 100644
--- a/cmd/rove-server/internal/accounts.go
+++ b/pkg/accounts/accounts.go
@@ -1,4 +1,4 @@
-package internal
+package accounts
 
 // Accountant decribes something that stores accounts and account values
 type Accountant interface {
diff --git a/cmd/rove-server/internal/accounts_test.go b/pkg/accounts/accounts_test.go
similarity index 98%
rename from cmd/rove-server/internal/accounts_test.go
rename to pkg/accounts/accounts_test.go
index 9e7891f..bd2416f 100644
--- a/cmd/rove-server/internal/accounts_test.go
+++ b/pkg/accounts/accounts_test.go
@@ -1,4 +1,4 @@
-package internal
+package accounts
 
 import (
 	"testing"
diff --git a/cmd/rove-server/internal/simpleAccountant.go b/pkg/accounts/simpleAccountant.go
similarity index 99%
rename from cmd/rove-server/internal/simpleAccountant.go
rename to pkg/accounts/simpleAccountant.go
index 611ff59..9d6c43f 100644
--- a/cmd/rove-server/internal/simpleAccountant.go
+++ b/pkg/accounts/simpleAccountant.go
@@ -1,4 +1,4 @@
-package internal
+package accounts
 
 import (
 	"fmt"
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index afe7605..0d828ae 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -7,6 +7,7 @@ import (
 	"math/rand"
 	"sync"
 
+	"github.com/mdiluz/rove/pkg/accounts"
 	"github.com/mdiluz/rove/pkg/maths"
 	"github.com/mdiluz/rove/proto/roveapi"
 )
@@ -40,6 +41,9 @@ 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
@@ -54,6 +58,7 @@ func NewWorld(chunkSize int) *World {
 		Atlas:        NewChunkAtlas(chunkSize),
 		TicksPerDay:  24,
 		CurrentTicks: 0,
+		Accountant:   accounts.NewSimpleAccountant(),
 	}
 }
 

From 6f2d67bd7c14e312cc5b44acef62addd2a8aa93e Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 22:22:32 +0100
Subject: [PATCH 13/18] Tag rovers by the controlling account

---
 cmd/rove-server/internal/server.go |  2 +-
 pkg/rove/command_test.go           | 14 +++++++-------
 pkg/rove/rover.go                  |  3 +++
 pkg/rove/world.go                  | 12 ++++++++++--
 pkg/rove/world_test.go             | 26 +++++++++++++-------------
 5 files changed, 34 insertions(+), 23 deletions(-)

diff --git a/cmd/rove-server/internal/server.go b/cmd/rove-server/internal/server.go
index 564656e..42392f3 100644
--- a/cmd/rove-server/internal/server.go
+++ b/cmd/rove-server/internal/server.go
@@ -205,7 +205,7 @@ 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
 	}
diff --git a/pkg/rove/command_test.go b/pkg/rove/command_test.go
index 9a8a35a..6560e53 100644
--- a/pkg/rove/command_test.go
+++ b/pkg/rove/command_test.go
@@ -10,7 +10,7 @@ import (
 
 func TestCommand_Toggle(t *testing.T) {
 	w := NewWorld(8)
-	a, err := w.SpawnRover()
+	a, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	r, err := w.GetRover(a)
@@ -36,7 +36,7 @@ func TestCommand_Toggle(t *testing.T) {
 
 func TestCommand_Turn(t *testing.T) {
 	w := NewWorld(8)
-	a, err := w.SpawnRover()
+	a, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	err = w.Enqueue(a, &roveapi.Command{Command: roveapi.CommandType_turn, Bearing: roveapi.Bearing_NorthWest})
@@ -50,7 +50,7 @@ func TestCommand_Turn(t *testing.T) {
 
 func TestCommand_Stash(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover()
+	name, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	info, err := w.GetRover(name)
@@ -78,7 +78,7 @@ func TestCommand_Stash(t *testing.T) {
 
 func TestCommand_Repair(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover()
+	name, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	info, err := w.GetRover(name)
@@ -118,7 +118,7 @@ func TestCommand_Repair(t *testing.T) {
 
 func TestCommand_Broadcast(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover()
+	name, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	// Enqueue the broadcast and tick
@@ -133,7 +133,7 @@ func TestCommand_Broadcast(t *testing.T) {
 
 func TestCommand_Salvage(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover()
+	name, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	info, err := w.GetRover(name)
@@ -161,7 +161,7 @@ func TestCommand_Salvage(t *testing.T) {
 
 func TestCommand_Invalid(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover()
+	name, err := w.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_none})
diff --git a/pkg/rove/rover.go b/pkg/rove/rover.go
index ce0edcd..d0fb9cb 100644
--- a/pkg/rove/rover.go
+++ b/pkg/rove/rover.go
@@ -66,6 +66,9 @@ 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
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index 0d828ae..922ab70 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -63,13 +63,16 @@ func NewWorld(chunkSize int) *World {
 }
 
 // SpawnRover adds an rover to the game
-func (w *World) SpawnRover() (string, error) {
+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),
@@ -375,6 +378,9 @@ func (w *World) RoverTransfer(rover string) (string, error) {
 	oldRover.AddLogEntryf("transferring to dormant rover %s", newRover.Name)
 	newRover.AddLogEntryf("transferred from rover %s", oldRover.Name)
 
+	// Clear the old owner
+	oldRover.Owner = ""
+
 	// Marshal old rover
 	oldRoverData, err := json.Marshal(oldRover)
 	if err != nil {
@@ -384,7 +390,9 @@ func (w *World) RoverTransfer(rover string) (string, error) {
 	// Add this new rover to tracking
 	w.Rovers[newRover.Name] = &newRover
 
-	// TODO: Swap account rover to the dormant one
+	// Swap account rover to the dormant one
+	newRover.Owner = oldRover.Owner
+	w.Accountant.AssignData(oldRover.Owner, "rover", newRover.Name)
 
 	// Place the old rover into the world
 	w.Atlas.SetObject(oldRover.Pos, Object{Type: roveapi.Object_RoverDormant, Data: oldRoverData})
diff --git a/pkg/rove/world_test.go b/pkg/rove/world_test.go
index e1fa700..d0c4c01 100644
--- a/pkg/rove/world_test.go
+++ b/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("tmp")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("tmp")
 	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("tmp")
 	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("tmp")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("tmp")
 	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("tmp")
 	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("tmp")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	// Warp the rovers into position
@@ -130,7 +130,7 @@ func TestWorld_RadarFromRover(t *testing.T) {
 
 func TestWorld_RoverDamage(t *testing.T) {
 	world := NewWorld(2)
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	pos := maths.Vector{
@@ -160,7 +160,7 @@ func TestWorld_RoverDamage(t *testing.T) {
 func TestWorld_Daytime(t *testing.T) {
 	world := NewWorld(1)
 
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	// Remove rover charge
@@ -199,10 +199,10 @@ func TestWorld_Daytime(t *testing.T) {
 func TestWorld_Broadcast(t *testing.T) {
 	world := NewWorld(8)
 
-	a, err := world.SpawnRover()
+	a, err := world.SpawnRover("tmp")
 	assert.NoError(t, err)
 
-	b, err := world.SpawnRover()
+	b, err := world.SpawnRover("tmp")
 	assert.NoError(t, err)
 
 	// Warp rovers near to eachother
@@ -265,7 +265,7 @@ 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("tmp")
 	assert.NoError(t, err)
 
 	// Warp the rover to 0,0 after clearing it

From fdfcc88540587ead99d016ebf9e0e69c5e78ddb6 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 22:50:35 +0100
Subject: [PATCH 14/18] Move the account registration into the world

---
 cmd/rove-server/internal/server.go | 12 ------------
 pkg/rove/world.go                  |  2 +-
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/cmd/rove-server/internal/server.go b/cmd/rove-server/internal/server.go
index 42392f3..7debe0a 100644
--- a/cmd/rove-server/internal/server.go
+++ b/cmd/rove-server/internal/server.go
@@ -210,17 +210,5 @@ func (s *Server) SpawnRoverForAccount(account string) (string, error) {
 		return "", err
 	}
 
-	err = s.world.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
 }
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index 922ab70..09d271a 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -97,7 +97,7 @@ func (w *World) SpawnRover(account string) (string, error) {
 	// Append the rover to the list
 	w.Rovers[rover.Name] = rover
 
-	return rover.Name, nil
+	return rover.Name, w.Accountant.AssignData(account, "rover", rover.Name)
 }
 
 // GetRover gets a specific rover by name

From 57621d169aaa0669484eef832f9ee8f3678f5176 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 22:50:47 +0100
Subject: [PATCH 15/18] Implement a test for transfer and fix bugs

---
 pkg/rove/command_test.go | 52 ++++++++++++++++++++++++++++++++++++++++
 pkg/rove/world.go        | 27 +++++++++++----------
 2 files changed, 66 insertions(+), 13 deletions(-)

diff --git a/pkg/rove/command_test.go b/pkg/rove/command_test.go
index 6560e53..13b95bf 100644
--- a/pkg/rove/command_test.go
+++ b/pkg/rove/command_test.go
@@ -1,6 +1,7 @@
 package rove
 
 import (
+	"encoding/json"
 	"testing"
 
 	"github.com/mdiluz/rove/pkg/maths"
@@ -159,6 +160,57 @@ func TestCommand_Salvage(t *testing.T) {
 	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_Invalid(t *testing.T) {
 	w := NewWorld(8)
 	name, err := w.SpawnRover("tmp")
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index 09d271a..bf68395 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -378,28 +378,26 @@ func (w *World) RoverTransfer(rover string) (string, error) {
 	oldRover.AddLogEntryf("transferring to dormant rover %s", newRover.Name)
 	newRover.AddLogEntryf("transferred from rover %s", oldRover.Name)
 
-	// Clear the old owner
+	// Transfer the ownership
+	w.Accountant.AssignData(oldRover.Owner, "rover", newRover.Name)
+	newRover.Owner = oldRover.Owner
 	oldRover.Owner = ""
 
-	// Marshal old rover
+	// Place the old rover in the world
 	oldRoverData, err := json.Marshal(oldRover)
 	if err != nil {
 		return "", err
 	}
-
-	// Add this new rover to tracking
-	w.Rovers[newRover.Name] = &newRover
-
-	// Swap account rover to the dormant one
-	newRover.Owner = oldRover.Owner
-	w.Accountant.AssignData(oldRover.Owner, "rover", newRover.Name)
-
-	// Place the old rover into the world
 	w.Atlas.SetObject(oldRover.Pos, Object{Type: roveapi.Object_RoverDormant, Data: oldRoverData})
 
-	// Remove old rover from current tracking
+	// 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
 }
 
@@ -599,7 +597,10 @@ func (w *World) Tick() {
 			}
 
 			// Extract the first command in the queue
-			w.CommandQueue[rover] = cmds[1:]
+			// Only if the command queue still has entries
+			if _, ok := w.CommandQueue[rover]; ok {
+				w.CommandQueue[rover] = cmds[1:]
+			}
 
 		} else {
 			// Clean out the empty entry

From a93ce97b0bcfe4e21331e6d0d31f3b00a5e3805b Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 22:54:06 +0100
Subject: [PATCH 16/18] Only assign rovers to accounts if given an account

---
 pkg/rove/command_test.go | 14 +++++++-------
 pkg/rove/world.go        |  8 +++++++-
 pkg/rove/world_test.go   | 26 +++++++++++++-------------
 3 files changed, 27 insertions(+), 21 deletions(-)

diff --git a/pkg/rove/command_test.go b/pkg/rove/command_test.go
index 13b95bf..935e35d 100644
--- a/pkg/rove/command_test.go
+++ b/pkg/rove/command_test.go
@@ -11,7 +11,7 @@ import (
 
 func TestCommand_Toggle(t *testing.T) {
 	w := NewWorld(8)
-	a, err := w.SpawnRover("tmp")
+	a, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	r, err := w.GetRover(a)
@@ -37,7 +37,7 @@ func TestCommand_Toggle(t *testing.T) {
 
 func TestCommand_Turn(t *testing.T) {
 	w := NewWorld(8)
-	a, err := w.SpawnRover("tmp")
+	a, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	err = w.Enqueue(a, &roveapi.Command{Command: roveapi.CommandType_turn, Bearing: roveapi.Bearing_NorthWest})
@@ -51,7 +51,7 @@ func TestCommand_Turn(t *testing.T) {
 
 func TestCommand_Stash(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover("tmp")
+	name, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	info, err := w.GetRover(name)
@@ -79,7 +79,7 @@ func TestCommand_Stash(t *testing.T) {
 
 func TestCommand_Repair(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover("tmp")
+	name, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	info, err := w.GetRover(name)
@@ -119,7 +119,7 @@ func TestCommand_Repair(t *testing.T) {
 
 func TestCommand_Broadcast(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover("tmp")
+	name, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Enqueue the broadcast and tick
@@ -134,7 +134,7 @@ func TestCommand_Broadcast(t *testing.T) {
 
 func TestCommand_Salvage(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover("tmp")
+	name, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	info, err := w.GetRover(name)
@@ -213,7 +213,7 @@ func TestCommand_Transfer(t *testing.T) {
 
 func TestCommand_Invalid(t *testing.T) {
 	w := NewWorld(8)
-	name, err := w.SpawnRover("tmp")
+	name, err := w.SpawnRover("")
 	assert.NoError(t, err)
 
 	err = w.Enqueue(name, &roveapi.Command{Command: roveapi.CommandType_none})
diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index bf68395..3d651da 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -97,7 +97,13 @@ func (w *World) SpawnRover(account string) (string, error) {
 	// Append the rover to the list
 	w.Rovers[rover.Name] = rover
 
-	return rover.Name, w.Accountant.AssignData(account, "rover", rover.Name)
+	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
diff --git a/pkg/rove/world_test.go b/pkg/rove/world_test.go
index d0c4c01..747a891 100644
--- a/pkg/rove/world_test.go
+++ b/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("tmp")
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover("tmp")
+	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("tmp")
+	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("tmp")
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover("tmp")
+	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("tmp")
+	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("tmp")
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
-	b, err := world.SpawnRover("tmp")
+	b, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Warp the rovers into position
@@ -130,7 +130,7 @@ func TestWorld_RadarFromRover(t *testing.T) {
 
 func TestWorld_RoverDamage(t *testing.T) {
 	world := NewWorld(2)
-	a, err := world.SpawnRover("tmp")
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	pos := maths.Vector{
@@ -160,7 +160,7 @@ func TestWorld_RoverDamage(t *testing.T) {
 func TestWorld_Daytime(t *testing.T) {
 	world := NewWorld(1)
 
-	a, err := world.SpawnRover("tmp")
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Remove rover charge
@@ -199,10 +199,10 @@ func TestWorld_Daytime(t *testing.T) {
 func TestWorld_Broadcast(t *testing.T) {
 	world := NewWorld(8)
 
-	a, err := world.SpawnRover("tmp")
+	a, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
-	b, err := world.SpawnRover("tmp")
+	b, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Warp rovers near to eachother
@@ -265,7 +265,7 @@ 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("tmp")
+	name, err := world.SpawnRover("")
 	assert.NoError(t, err)
 
 	// Warp the rover to 0,0 after clearing it

From a0e04b7e3a287ee842d9240edd57f18e7e4271d3 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 22:56:35 +0100
Subject: [PATCH 17/18] Placed dormant world rovers randomly have better base
 stats

---
 pkg/rove/worldgen.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkg/rove/worldgen.go b/pkg/rove/worldgen.go
index e36b7b6..724837d 100644
--- a/pkg/rove/worldgen.go
+++ b/pkg/rove/worldgen.go
@@ -3,6 +3,7 @@ package rove
 import (
 	"encoding/json"
 	"log"
+	"math/rand"
 
 	"github.com/mdiluz/rove/pkg/maths"
 	"github.com/mdiluz/rove/proto/roveapi"
@@ -76,6 +77,12 @@ func (g *NoiseWorldGen) GetObject(v maths.Vector) (obj Object) {
 		// Set the rover variables
 		r.Pos = v
 
+		// Upgrade this rover randomly
+		r.MaximumCharge += rand.Int() % 3
+		r.MaximumIntegrity += rand.Int() % 3
+		r.Capacity += rand.Int() % 3
+		r.Range += rand.Int() % 3
+
 		// For now, mark the log as corrupted
 		r.AddLogEntryf("log corrupted")
 

From 7be0f83c5ea64bdcaf3635bc747e664fb54eaf20 Mon Sep 17 00:00:00 2001
From: Marc Di Luzio <marc.diluzio@gmail.com>
Date: Fri, 24 Jul 2020 22:58:59 +0100
Subject: [PATCH 18/18] Fix golanglint missing error check

---
 pkg/rove/world.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pkg/rove/world.go b/pkg/rove/world.go
index 3d651da..27ded3b 100644
--- a/pkg/rove/world.go
+++ b/pkg/rove/world.go
@@ -385,7 +385,10 @@ func (w *World) RoverTransfer(rover string) (string, error) {
 	newRover.AddLogEntryf("transferred from rover %s", oldRover.Name)
 
 	// Transfer the ownership
-	w.Accountant.AssignData(oldRover.Owner, "rover", newRover.Name)
+	err = w.Accountant.AssignData(oldRover.Owner, "rover", newRover.Name)
+	if err != nil {
+		return "", err
+	}
 	newRover.Owner = oldRover.Owner
 	oldRover.Owner = ""