cmd/horsebot: allow acting only as api server

cmd/horsebot/main.go

@@ -27,7 +27,6 @@ import (
 	"zombiezen.com/go/sqlite"
 	"zombiezen.com/go/sqlite/sqlitex"
 
-	"git.sunturtle.xyz/zephyr/horse"
 	"git.sunturtle.xyz/zephyr/horse/mdb"
 )
 
@@ -67,6 +66,7 @@ func main() {
 	}
 	slog.SetDefault(slog.New(lh))
 
+	if public != "" {
 		stat, err := os.Stat(public)
 		if err != nil {
 			slog.Error("public", slog.Any("err", err))
@@ -76,6 +76,7 @@ func main() {
 			slog.Error("public", slog.String("err", "not a directory"))
 			os.Exit(1)
 		}
+	}
 
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
 
@@ -85,6 +86,8 @@ func main() {
 		os.Exit(1)
 	}
 
+	var client *bot.Client
+	if tokenFile != "" {
 		skills, err := mdb.Skills(ctx, db)
 		slog.Info("loaded skills", slog.Int("count", len(skills)))
 		groups, err2 := mdb.SkillGroups(ctx, db)
@@ -96,13 +99,6 @@ func main() {
 		skillSrv := newSkillServer(skills, groups)
 		slog.Info("skill server ready")
 
-	token, err := os.ReadFile(tokenFile)
-	if err != nil {
-		slog.Error("reading token", slog.Any("err", err))
-		os.Exit(1)
-	}
-	token = bytes.TrimSuffix(token, []byte{'\n'})
-
 		r := handler.New()
 		r.DefaultContext(func() context.Context { return ctx })
 		r.Use(middleware.Go)
@@ -113,15 +109,25 @@ func main() {
 			r.SelectMenuComponent("/swap", skillSrv.menu)
 			r.ButtonComponent("/swap/{id}", skillSrv.button)
 		})
+
 		slog.Info("connect", slog.String("disgo", disgo.Version))
-	client, err := disgo.New(string(token), bot.WithDefaultGateway(), bot.WithEventListeners(r))
+		token, err := os.ReadFile(tokenFile)
+		if err != nil {
+			slog.Error("reading token", slog.Any("err", err))
+			os.Exit(1)
+		}
+		token = bytes.TrimSuffix(token, []byte{'\n'})
+		client, err = disgo.New(string(token), bot.WithDefaultGateway(), bot.WithEventListeners(r))
 		if err != nil {
 			slog.Error("building bot", slog.Any("err", err))
 			os.Exit(1)
 		}
+	}
 
 	mux := http.NewServeMux()
+	if public != "" {
 		mux.Handle("GET /", httpmiddle.Compress(5)(http.FileServerFS(os.DirFS(public))))
+	}
 	mux.Handle("GET /api/global/affinity", httpmiddle.Compress(5)(dataroute(ctx, db, mdb.AffinitySummary)))
 	mux.Handle("GET /api/global/character", httpmiddle.Compress(5)(dataroute(ctx, db, mdb.Characters)))
 	mux.Handle("GET /api/global/conversation", httpmiddle.Compress(5)(dataroute(ctx, db, mdb.Conversations)))
@@ -162,6 +168,7 @@ func main() {
 		slog.Error("HTTP server closed", slog.Any("err", err))
 	}()
 
+	if client != nil {
 		if err := handler.SyncCommands(client, commands, nil, rest.WithCtx(ctx)); err != nil {
 			slog.Error("syncing commands", slog.Any("err", err))
 			os.Exit(1)
@@ -172,13 +179,17 @@ func main() {
 			slog.Error("starting gateway", slog.Any("err", err))
 			stop()
 		}
+	}
+
 	slog.Info("ready")
 	<-ctx.Done()
 	stop()
 
 	ctx, stop = context.WithTimeout(context.Background(), 5*time.Second)
 	defer stop()
+	if client != nil {
 		client.Close(ctx)
+	}
 	if err := srv.Shutdown(ctx); err != nil {
 		slog.Error("HTTP API shutdown", slog.Any("err", err))
 		os.Exit(1)
@@ -204,30 +215,6 @@ var commands = []discord.ApplicationCommandCreate{
 	},
 }
 
-func loadSkills(file string) ([]horse.Skill, error) {
-	b, err := os.ReadFile(file)
-	if err != nil {
-		return nil, err
-	}
-	var skills []horse.Skill
-	if err := json.Unmarshal(b, &skills); err != nil {
-		return nil, err
-	}
-	return skills, nil
-}
-
-func loadSkillGroups(file string) ([]horse.SkillGroup, error) {
-	b, err := os.ReadFile(file)
-	if err != nil {
-		return nil, err
-	}
-	var groups []horse.SkillGroup
-	if err := json.Unmarshal(b, &groups); err != nil {
-		return nil, err
-	}
-	return groups, nil
-}
-
 func dataroute[T any](ctx context.Context, db *sqlitex.Pool, f func(context.Context, *sqlitex.Pool) ([]T, error)) http.HandlerFunc {
 	return func(w http.ResponseWriter, r *http.Request) {
 		data, err := f(ctx, db)