package frontend

import (
	"embed"
	"io/fs"
)

// dist holds the frontend's build output, copied from web/dist by `npm run
// sync` in web/. Only dist/.gitkeep is committed (Go can't embed a missing
// directory), so a binary built without syncing first has no frontend.
//
//go:embed all:dist
var dist embed.FS

// Embedded returns the frontend's build output embedded in the binary, or
// nil if none was synced before it was built (there is no index.html).
func Embedded() fs.FS {
	files, err := fs.Sub(dist, "dist")
	if err != nil || CheckFS(files) != nil {
		return nil
	}

	return files
}