package srt

import (
	"os"
	"io"
	"strings"
)

func NewWriter(stream_key string) (io.WriteCloser, error) {
	base_dir, _ := os.UserHomeDir()
	file, err := os.Create(base_dir + "/live/" + stream_key + "/rawdump.ts")
	if err != nil {
		return nil, err
	}
	return file, nil
}

func CheckStreamID(stream_id []byte) (io.WriteCloser, bool) {
	stream_key := make([]byte, 0)
	for i := len(stream_id) - 1; i >= 0; i-- {
		if stream_id[i] == 0 {
			break
		}
		stream_key = append(stream_key, stream_id[i])
	}
	stream_key_string := strings.TrimSpace(string(stream_key))
	if check_stream_key(stream_key_string) {
		writer, err := NewWriter(stream_key_string)
		if err != nil {
			return nil, false
		}
		return writer, true
	}
	return nil, false
}

func check_stream_key(stream_key string) (bool) {
	base_dir, _ := os.UserHomeDir()
	if fileinfo, err := os.Stat(base_dir + "/live/" + stream_key); err == nil && fileinfo.IsDir() {
		return true
	}
	return false
}