Add register functionality

Add gitignore

.gitignore

@@ -0,0 +1 @@
+*.swp

config.gcfg

@@ -1,5 +1,6 @@
 [nethacklauncher]
   loglevel            = "debug"
+  serverdisplay       = "unixvoid.com underground nethack server"
   recordlocation      = "record"
   reclistlocation     = "reclist"
   bootstrapdelay      = 1

nethack-launcher.go

@@ -7,9 +7,11 @@ import (
 	"net/http"
 	"os"
 	"os/exec"
+	"strings"
 	"time"
 
 	"github.com/unixvoid/glogger"
+	"golang.org/x/crypto/sha3"
 	"gopkg.in/gcfg.v1"
 	"gopkg.in/redis.v5"
 )
@@ -17,6 +19,7 @@ import (
 type Config struct {
 	NethackLauncher struct {
 		Loglevel        string
+		ServerDisplay   string
 		RecordLocation  string
 		ReclistLocation string
 		BootstrapDelay  time.Duration
@@ -111,7 +114,7 @@ func clearScreen() {
 
 func printWelcomeScreen(redisClient *redis.Client) string {
 	clearScreen()
-	println("unixvoid.com underground nethack server")
+	fmt.Printf(" %s\n", config.NethackLauncher.ServerDisplay)
 	println("")
 	println(" Not logged in.")
 	println("")
@@ -133,12 +136,14 @@ func printWelcomeScreen(redisClient *redis.Client) string {
 		switch string(b) {
 		case "l":
 			// restart display
-			exec.Command("stty", "-F", "/dev/tty", "echo").Run()
+			exec.Command("stty", "-F", "/dev/tty", "echo", "-cbreak").Run()
 			clearScreen()
 			printLoginScreen(redisClient)
 		case "r":
+			// restart display
+			exec.Command("stty", "-F", "/dev/tty", "echo", "-cbreak").Run()
 			clearScreen()
-			return ("r")
+			printRegisterScreen(redisClient)
 		case "w":
 			clearScreen()
 			return ("w")
@@ -151,7 +156,7 @@ func printWelcomeScreen(redisClient *redis.Client) string {
 }
 
 func printLoginScreen(redisClient *redis.Client) {
-	println("unixvoid.com underground nethack server")
+	fmt.Printf(" %s\n", config.NethackLauncher.ServerDisplay)
 	println("")
 	println(" Please enter your username. (blank entry aborts)")
 	println("")
@@ -165,6 +170,79 @@ func printLoginScreen(redisClient *redis.Client) {
 
 		fmt.Printf("you entered '%s'\n", scanner.Text())
 		// check redis for user
+		usernameHash := sha3.Sum512([]byte(scanner.Text()))
+		_, err := redisClient.Get(fmt.Sprintf("user:%x", usernameHash)).Result()
+		if err != redis.Nil {
+			// user already exists
+
+		} else {
+			// set up user
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		fmt.Printf("%s\n", err)
+	}
+}
+
+func printRegisterScreen(redisClient *redis.Client) {
+	// TODO : configure password restriction checking
+	fmt.Printf(" %s\n", config.NethackLauncher.ServerDisplay)
+	println("")
+	println(" Welcome new user. Please enter a username")
+	println(" Only characters and numbers are allowed, with no spaces.")
+	println(" 20 characters max.")
+	println("")
+	fmt.Printf(">> ")
+
+	scanner := bufio.NewScanner(os.Stdin)
+	for scanner.Scan() {
+		if scanner.Text() == "" {
+			printWelcomeScreen(redisClient)
+		}
+
+		// check redis for user
+		usernameHash := sha3.Sum512([]byte(scanner.Text()))
+		_, err := redisClient.Get(fmt.Sprintf("user:%x", usernameHash)).Result()
+		if err != redis.Nil {
+			// user already exists
+			fmt.Printf("There was a problem with your last entry.\n>> ")
+		} else {
+			// set up user
+
+			// turn off echo display
+			exec.Command("stty", "-F", "/dev/tty", "-echo").Run()
+			reader := bufio.NewReader(os.Stdin)
+
+			noPass := true
+			sec := ""
+			for noPass {
+				// pull pass the first time
+				fmt.Printf(" Please enter your password (blank entry aborts).\n>> ")
+				sec0, _ := reader.ReadString('\n')
+				sec0 = strings.Replace(sec0, "\n", "", -1)
+				if sec0 == "" {
+					printWelcomeScreen(redisClient)
+				}
+
+				// pull pass the second time
+				fmt.Printf("\n Please enter your password again.\n>> ")
+				sec1, _ := reader.ReadString('\n')
+				sec1 = strings.Replace(sec1, "\n", "", -1)
+
+				// make sure passwords match
+				if sec0 == sec1 {
+					sec = sec0
+					noPass = false
+				} else {
+					fmt.Println("Lets try that again.")
+				}
+			}
+			// set user in redis
+			secHash := sha3.Sum512([]byte(sec))
+			redisClient.Set(fmt.Sprintf("user:%x", usernameHash), fmt.Sprintf("%x", secHash), 0).Err()
+			fmt.Println("Success")
+			os.Exit(0)
+		}
 	}
 	if err := scanner.Err(); err != nil {
 		fmt.Printf("%s\n", err)