cmd: move toradl into horsebot

Fixes #31.

cmd/horsebot/main.go

@@ -36,6 +36,7 @@ func main() {
 		addr   string
 		mdbf   string
 		public string
+		img    string
 		// discord
 		tokenFile string
 		apiRoute  string
@@ -47,6 +48,7 @@ func main() {
 	flag.StringVar(&addr, "http", ":13669", "`address` to bind HTTP server")
 	flag.StringVar(&mdbf, "mdb", "", "`path` to master.mdb")
 	flag.StringVar(&public, "public", "", "`dir`ectory containing the website to serve")
+	flag.StringVar(&img, "img", "", "`dir`ectory to save and serve images")
 	flag.StringVar(&tokenFile, "token", "", "`file` containing the Discord bot token")
 	flag.StringVar(&apiRoute, "route", "/interactions/callback", "`path` to serve Discord HTTP API calls")
 	flag.StringVar(&pubkey, "key", "", "Discord public key")
@@ -86,6 +88,17 @@ func main() {
 		os.Exit(1)
 	}
 
+	if img != "" {
+		// Ensure the img directory is in fact a directory
+		// before we start trying to fill it out.
+		err := os.MkdirAll(img, 0777)
+		if err != nil {
+			slog.Error("img", slog.Any("err", err))
+			os.Exit(1)
+		}
+		go saveImgs(ctx, db, img)
+	}
+
 	var client *bot.Client
 	if tokenFile != "" {
 		skills, err := mdb.Skills(ctx, db)
@@ -128,6 +141,9 @@ func main() {
 	if public != "" {
 		mux.Handle("GET /", httpmiddle.Compress(5)(http.FileServerFS(os.DirFS(public))))
 	}
+	if img != "" {
+		mux.Handle("GET /img/", http.StripPrefix("/img", http.FileServerFS(os.DirFS(img))))
+	}
 	mux.Handle("GET /api/global/affinity", httpmiddle.Compress(5)(dataroute(ctx, db, mdb.AffinitySummary)))
 	mux.Handle("GET /api/global/affinity-detail", httpmiddle.Compress(5)(dataroute(ctx, db, mdb.AffinityDetail)))
 	mux.Handle("GET /api/global/character", httpmiddle.Compress(5)(dataroute(ctx, db, mdb.Characters)))