nethack-launcher/nethack-launcher/print_progress_screen.go

package main

import (
	"fmt"
	"os"
	"os/exec"
	"strconv"
	"strings"

	"gopkg.in/redis.v5"
)

func printProgressScreen(redisClient *redis.Client, username string) {
	// print header
	fmt.Printf(" %s\n", config.NethackLauncher.ServerDisplay)
	println("")

	// check directory for live players
	isNotEmpty, err := redisClient.Exists("inprogress").Result()
	if err != nil {
		panic(err)
	}
	if isNotEmpty {
		println(" Choose a player to spectate ('enter' without selection returns)")
	} else {
		println(" No live players currently (blank entry returns)")
	}
	println("")

	inProg := make(map[int]string)
	inProgTimer := 1
	inprogress, err := redisClient.SMembers("inprogress").Result()
	if err != nil {
		panic(err)
	}
	for _, i := range inprogress {
		// loop through users
		fmt.Printf(" %d) %s\n", inProgTimer, i)

		// add user to line map
		inProg[inProgTimer] = i
		inProgTimer++
	}

	println("")
	fmt.Printf(">> ")
	// start user input

	// disable input buffering
	exec.Command("stty", "-F", "/dev/tty", "cbreak", "min", "1").Run()
	// do not display entered characters on the screen
	exec.Command("stty", "-F", "/dev/tty", "-echo").Run()

	var b []byte = make([]byte, 1)
	for {
		os.Stdin.Read(b)
		s, _ := strconv.Atoi(string(b))

		// check if user is trying to navigate
		if string(b) == "\n" {
			exec.Command("stty", "-F", "/dev/tty", "echo", "-cbreak").Run()
			clearScreen()
			if username == "" {
				printWelcomeScreen(redisClient)
			} else {
				printUserScreen(redisClient, username)
			}
		}

		// check if selection is in out map
		if inProg[s] != "" {
			user := strings.Split(inProg[s], ":")
			fmt.Printf("going to spectate '%s'\n", user[0])

			// set ttyrec path
			ttyName, _ := redisClient.Get(fmt.Sprintf("inprogress:%s", user[0])).Result()
			ttyrecPath := fmt.Sprintf("%s/user/%s/ttyrec/%s.ttyrec", config.NethackLauncher.HackDir, user[0], ttyName)

			// restart display
			exec.Command("stty", "-F", "/dev/tty", "echo", "-cbreak").Run()
			clearScreen()
			nh := exec.Command("ttyplay", "-p", ttyrecPath)
			//nh := exec.Command("termplay", "-f", "live", ttyrecPath)
			nh.Stdout = os.Stdout
			nh.Stdin = os.Stdin
			nh.Stderr = os.Stderr
			nh.Run()
			if username == "" {
				printWelcomeScreen(redisClient)
			} else {
				printUserScreen(redisClient, username)
			}
			// TODO fix bug where user has to <ctrl-c> when game exists
		}
	}
}