initialize main entry point

cmd/main.go

@@ -0,0 +1,87 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+	"path"
+	"git.defalsify.org/vise.git/engine"
+
+	"git.defalsify.org/vise.git/resource"
+	"git.defalsify.org/vise.git/state"
+)
+
+const (
+	USERFLAG_LANGUAGE_SET = iota + state.FLAG_USERSTART
+)
+
+type fsData struct {
+	path      string
+}
+
+func (fsd *fsData) SetLanguageSelected(ctx context.Context, sym string, input []byte) (resource.Result, error) {
+	inputStr := string(input)
+	res := resource.Result{}
+
+	switch inputStr {
+	case "0":
+		res.FlagSet = []uint32{state.FLAG_LANG}
+		res.Content = "eng"
+	case "1":
+		res.FlagSet = []uint32{state.FLAG_LANG}
+		res.Content = "swa"
+	default:
+	}
+	return res, nil
+}
+
+func main() {
+	var dir string
+	var root string
+	var size uint
+	var sessionId string
+	var persist bool
+	flag.StringVar(&dir, "d", ".", "resource dir to read from")
+	flag.UintVar(&size, "s", 0, "max size of output")
+	flag.StringVar(&root, "root", "root", "entry point symbol")
+	flag.StringVar(&sessionId, "session-id", "default", "session id")
+	flag.BoolVar(&persist, "persist", false, "use state persistence")
+	flag.Parse()
+	fmt.Fprintf(os.Stderr, "starting session at symbol '%s' using resource dir: %s\n", root, dir)
+
+	fp := path.Join(dir, sessionId)
+	fs := &fsData{
+		path: fp,
+	}
+
+	ctx := context.Background()
+	en, rs, err := engine.NewSizedEnginee(dir, uint32(size), persist, &sessionId)
+	rs.AddLocalFunc("select_language", fs.SetLanguageSelected)
+
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "engine create error: %v", err)
+		os.Exit(1)
+	}
+	cont, err := en.Init(ctx)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "engine init exited with error: %v\n", err)
+		os.Exit(1)
+	}
+	if !cont {
+		_, err = en.WriteResult(ctx, os.Stdout)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "dead init write error: %v\n", err)
+			os.Exit(1)
+		}
+		os.Stdout.Write([]byte{0x0a})
+		os.Exit(0)
+	}
+
+	err = engine.Loop(ctx, en, os.Stdin, os.Stdout)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "loop exited with error: %v\n", err)
+		os.Exit(1)
+	}
+
+}