travel works again

connection.go

@@ -84,10 +84,19 @@ func (c *Connection) Tick(frame int64) {
 func (c *Connection) RunCommand(name string, args ...string) {
 	defer func() {
 		if r := recover(); r != nil {
-			c.Printf("shit is *really* fucked up.")
+			c.Printf("shit is *really* fucked up.\n")
 			log_error("recovered: %v", r)
 		}
 	}()
+	switch name {
+	case "commands":
+		commands := c.Commands()
+		for _, command := range commands {
+			c.Printf("%s\n", command.name)
+		}
+		return
+	}
+
 	cmd := c.GetCommand(name)
 	if cmd == nil {
 		c.Printf("No such command: %v\n", name)

idle.go

@@ -2,22 +2,41 @@ package main
 
 import (
 	"fmt"
+	"time"
 )
 
-var idleCommands = CommandSet{
-	balCommand,
-	commandsCommand,
-	helpCommand,
-	playersCommand,
-}
-
 type IdleState struct {
 	CommandSuite
 	*System
 }
 
 func Idle(sys *System) ConnectionState {
-	return &IdleState{idleCommands, sys}
+	i := &IdleState{System: sys}
+	i.CommandSuite = CommandSet{
+		balCommand,
+		commandsCommand,
+		helpCommand,
+		playersCommand,
+		Command{
+			name:    "goto",
+			help:    "travel between star systems",
+			arity:   1,
+			handler: i.travelTo,
+		},
+		Command{
+			name:    "nearby",
+			help:    "list nearby star systems",
+			arity:   0,
+			handler: i.nearby,
+		},
+		Command{
+			name:    "bomb",
+			help:    "bomb another star system",
+			arity:   1,
+			handler: i.bomb,
+		},
+	}
+	return i
 }
 
 func (i *IdleState) String() string {
@@ -45,35 +64,40 @@ func (i *IdleState) travelTo(c *Connection, args ...string) {
 	c.SetState(NewTravel(c, i.System, dest))
 }
 
-func (i *IdleState) GetCommand(name string) *Command {
-	return idleCommands.GetCommand(name)
+func (i *IdleState) nearby(c *Connection, args ...string) {
+	neighbors, err := i.Nearby(25)
+	if err != nil {
+		log_error("unable to get neighbors: %v", err)
+		return
+	}
+	c.Printf("--------------------------------------------------------------------------------\n")
+	c.Printf("%-4s %-20s %s\n", "id", "name", "distance")
+	c.Printf("--------------------------------------------------------------------------------\n")
+	for _, neighbor := range neighbors {
+		other := index[neighbor.id]
+		c.Printf("%-4d %-20s %v\n", other.id, other.name, neighbor.distance)
+	}
+	c.Printf("--------------------------------------------------------------------------------\n")
 }
 
-// func (i *IdleState) RunCommand(c *Connection, name string, args ...string) ConnectionState {
-// 	switch name {
-// 	case "goto":
-// 		dest, err := GetSystem(args[0])
-// 		if err != nil {
-// 			c.Printf("%v\n", err)
-// 			break
-// 		}
-// 		return NewTravel(c, i.System, dest)
-// 	case "nearby":
-// 		neighbors, err := i.Nearby(25)
-// 		if err != nil {
-// 			log_error("unable to get neighbors: %v", err)
-// 			break
-// 		}
-// 		c.Printf("--------------------------------------------------------------------------------\n")
-// 		c.Printf("%-4s %-20s %s\n", "id", "name", "distance")
-// 		c.Printf("--------------------------------------------------------------------------------\n")
-// 		for _, neighbor := range neighbors {
-// 			other := index[neighbor.id]
-// 			c.Printf("%-4d %-20s %v\n", other.id, other.name, neighbor.distance)
-// 		}
-// 		c.Printf("--------------------------------------------------------------------------------\n")
-// 	default:
-// 		c.Printf("No such command: %v\n", name)
-// 	}
-// 	return i
-// }
+func (i *IdleState) bomb(c *Connection, args ...string) {
+	if c.bombs <= 0 {
+		c.Printf("Cannot send bomb: no bombs left!  Build more bombs!\n")
+		return
+	}
+	if time.Since(c.lastBomb) < 5*time.Second {
+		c.Printf("Cannot send bomb: bombs are reloading\n")
+		return
+	}
+
+	target, err := GetSystem(args[0])
+	if err != nil {
+		c.Printf("Cannot send bomb: %v\n", err)
+		return
+	}
+
+	c.bombs -= 1
+	c.lastBomb = time.Now()
+	bomb := NewBomb(c, i.System, target)
+	currentGame.Register(bomb)
+}

main.go

@@ -65,6 +65,10 @@ func durToFrames(dur time.Duration) int64 {
 	return int64(dur / options.frameLength)
 }
 
+func framesToDur(frames int64) time.Duration {
+	return options.frameLength * time.Duration(frames)
+}
+
 func main() {
 	flag.Parse()
 	dbconnect()

travel.go

@@ -2,26 +2,52 @@ package main
 
 import (
 	"fmt"
+	"time"
 )
 
 type TravelState struct {
 	CommandSuite
 	start     *System
 	dest      *System
-	travelled float64
-	dist      float64
+	travelled float64 // distance traveled so far in parsecs
+	dist      float64 // distance between start and end in parsecs
 }
 
 func NewTravel(c *Connection, start, dest *System) ConnectionState {
-	return &TravelState{
+	t := &TravelState{
 		start: start,
 		dest:  dest,
 		dist:  start.DistanceTo(dest),
 	}
+	t.CommandSuite = CommandSet{
+		helpCommand,
+		playersCommand,
+		balCommand,
+		Command{
+			name:    "progress",
+			help:    "displays how far you are along your travel",
+			arity:   0,
+			handler: t.progress,
+		},
+		Command{
+			name:  "eta",
+			help:  "displays estimated time of arrival",
+			arity: 0,
+			handler: func(c *Connection, args ...string) {
+				c.Printf("Remaining: %v\n", t.remaining())
+				c.Printf("Current time: %v\n", time.Now())
+				c.Printf("ETA: %v\n", t.eta())
+			},
+		},
+	}
+	return t
 }
 
 func (t *TravelState) Enter(c *Connection) {
 	c.Printf("Leaving %v, bound for %v.\n", t.start, t.dest)
+	c.Printf("Trip duration: %v\n", t.tripTime())
+	c.Printf("Current time: %v\n", time.Now())
+	c.Printf("ETA: %v\n", t.eta())
 }
 
 func (t *TravelState) Tick(c *Connection, frame int64) ConnectionState {
@@ -39,3 +65,23 @@ func (t *TravelState) Exit(c *Connection) {
 func (t *TravelState) String() string {
 	return fmt.Sprintf("Traveling from %v to %v", t.start, t.dest)
 }
+
+func (t *TravelState) progress(c *Connection, args ...string) {
+	c.Printf("%v\n", t.travelled/t.dist)
+}
+
+func (t *TravelState) remaining() time.Duration {
+	remaining := t.dist - t.travelled
+	frames := remaining / (options.playerSpeed * options.lightSpeed)
+	return framesToDur(int64(frames))
+}
+
+func (t *TravelState) eta() time.Time {
+	// distance remaining in parsecs
+	return time.Now().Add(t.remaining())
+}
+
+func (t *TravelState) tripTime() time.Duration {
+	frames := t.dist / (options.playerSpeed * options.lightSpeed)
+	return framesToDur(int64(frames))
+}