refactoring the core app logic a bit

cmd/cli/guest/main.go

@@ -1,12 +1,14 @@
 package main
 
 import (
+	"context"
 	"flag"
 	"log/slog"
 	"os"
+	"os/signal"
+	"syscall"
 
-	"github.com/EngoEngine/ecs"
-
+	"code.ndumas.com/ndumas/muddy/core"
 	"code.ndumas.com/ndumas/muddy/systems"
 )
 
@@ -19,35 +21,28 @@ func main() {
 
 	flag.Parse()
 
-	var logLevel slog.Level
-	switch level {
-	case "INFO", "info":
-		logLevel = slog.LevelInfo
-	case "DEBUG", "debug":
-		logLevel = slog.LevelDebug
-	case "ERROR", "error":
-		logLevel = slog.LevelError
-	}
-
-	l := slog.New(slog.NewTextHandler(
-		os.Stderr, &slog.HandlerOptions{
-			Level: logLevel,
-		},
-	),
-	)
-
-	world := ecs.World{}
+	app := core.New(level)
 
 	rs := &systems.RoomSystem{
 		Rooms: make(map[uint64]*systems.Room, 0),
-		L:     l.With(slog.String("system", "room")),
+		L:     app.L.With(slog.String("system", "room")),
 	}
 
-	world.AddSystem(rs)
+	app.W.AddSystem(rs)
 
-	l.With(
+	app.L.With(
 		slog.Int("room count", len(rs.Rooms)),
 	).Info("setup complete")
 
-	world.Update(1)
+	ctx, cancel := context.WithCancel(context.Background())
+
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-c
+		cancel()
+	}()
+
+	app.Run(ctx)
+
 }

components/components.go

@@ -10,6 +10,10 @@ type Location struct {
 	Exits   []uint64
 }
 
+type LocationLink struct {
+	To, From uint64
+}
+
 type Observable struct {
 	Name        string
 	Description string

core/core.go

@@ -0,0 +1,69 @@
+package core
+
+import (
+	"bufio"
+	"context"
+	"log/slog"
+	"os"
+	"time"
+
+	"github.com/EngoEngine/ecs"
+)
+
+type App struct {
+	W *ecs.World
+	L *slog.Logger
+}
+
+func New(level string) *App {
+	var logLevel slog.Level
+	switch level {
+	case "INFO", "info":
+		logLevel = slog.LevelInfo
+	case "DEBUG", "debug":
+		logLevel = slog.LevelDebug
+	case "ERROR", "error":
+		logLevel = slog.LevelError
+	}
+
+	l := slog.New(slog.NewTextHandler(
+		os.Stderr, &slog.HandlerOptions{
+			Level: logLevel,
+		},
+	),
+	)
+
+	world := &ecs.World{}
+
+	return &App{
+		L: l,
+		W: world,
+	}
+
+}
+
+func (a *App) Run(ctx context.Context) {
+	go func() {
+		t := time.NewTicker(time.Millisecond * 30)
+		for range t.C {
+			a.W.Update(1)
+		}
+	}()
+
+	scanner := bufio.NewScanner(os.Stdin)
+	var line string
+	for {
+		select {
+		case <-ctx.Done():
+			a.L.Error("cancelled")
+			return
+		default:
+			if scanner.Scan() {
+				line = scanner.Text()
+			}
+			a.L.Info("scanning input")
+			a.L.With(slog.String("input", line)).Info("received command")
+		}
+	}
+
+}

systems/room.go

@@ -3,12 +3,19 @@ package systems
 import (
 	"fmt"
 	"log/slog"
+	"math/rand"
 
 	"github.com/EngoEngine/ecs"
 
 	"code.ndumas.com/ndumas/muddy/components"
 )
 
+type Exit struct {
+	*components.ID
+	*components.Observable
+	To, From uint64
+}
+
 type Room struct {
 	*components.ID
 	*components.Location
@@ -32,8 +39,9 @@ func (rs *RoomSystem) New(w *ecs.World) {
 					ID: uint64(z),
 				},
 				Location: &components.Location{
-					X: int64(i),
-					Y: int64(j),
+					X:     int64(i),
+					Y:     int64(j),
+					Exits: make([]uint64, 0),
 				},
 				Observable: &components.Observable{
 					Name:        fmt.Sprintf("Room (%d,%d)", i, j),
@@ -53,6 +61,16 @@ func (rs *RoomSystem) New(w *ecs.World) {
 }
 
 func (rs *RoomSystem) Update(dt float32) {
+	rs.L.Debug("tick")
+	weather := []string{
+		"The sky is clear and birds sing.",
+		"It's dark and rainy.",
+		"It's raining men, hallelujah!",
+	}
+
+	if rand.Intn(2000) > 1990 {
+		fmt.Println(weather[rand.Intn(len(weather))])
+	}
 
 	// flush changes to persistent storage
 }