These are my updates

README.md

@@ -3,7 +3,7 @@
 A tiny TCP server implementing a basic Buletin Board Service.
 
 ```shell
-telnet localhost 5555
+telnet localhost 2323
 ```
 
 ```text
@@ -17,13 +17,19 @@ telnet localhost 5555
 |                                           |
 +-------------------------------------------+
 vxn-dev bbs-go service (0.6.1)
-telnet localhost 5555
+telnet localhost 2323
+
+Enter username (or type 'register'): register
+Choose a username: noarche
+Choose a password:
+Registration successful.
+> help
+*** Commands:
+    help           --- show this help message
+    post <message> --- post a message to the board
+    read           --- read recent messages
+    exit           --- quit the session
 
-> test
-*** Invalid command
-
-> exit
-*** Bye
 ```
 
 ## build and run

internal/config/config.go

@@ -1,61 +1,10 @@
 package config
 
-import (
-	"flag"
-	"os"
-	"strconv"
-)
-
-const (
-	ENV_DEBUG   string = "DEBUG"
-	ENV_HOST    string = "LISTEN_ADDR"
-	ENV_PORT    string = "LISTEN_PORT"
-	ENV_VERSION string = "PROJECT_VERSION"
-)
-
-const (
-	defaultDebug bool   = false
-	defaultHost  string = "localhost"
-	defaultPort  int    = 5555
-)
-
 var (
-	Debug   bool
-	Host    string
-	Port    int
-	Version string
+	Host            string
+	Port            int
+	Version         string
+	Debug           bool
+	MaxMessages     = 1000000
+	MaxReadMessages = 30
 )
-
-func init() {
-	flag.BoolVar(&Debug, "debug", defaultDebug, "a boolean, makes the server's output more verbose")
-	flag.StringVar(&Host, "host", defaultHost, "a string, a FQDN type of host's name")
-	flag.IntVar(&Port, "port", defaultPort, "an integer, a port to listen for incoming requests on")
-
-	flag.Parse()
-
-	//
-	//  Try ENV vars.
-	//
-
-	var err error
-
-	// Should be non-empty true, otherwise is false.
-	if os.Getenv(ENV_DEBUG) != "" {
-		Debug, err = strconv.ParseBool(os.Getenv(ENV_DEBUG))
-		if err != nil {
-			Debug = defaultDebug
-		}
-	}
-
-	// Should be set to anything non-empty.
-	if os.Getenv(ENV_PORT) != "" {
-		Port, err = strconv.Atoi(os.Getenv(ENV_PORT))
-		if err != nil {
-			Port = defaultPort
-		}
-	}
-
-	if os.Getenv(ENV_VERSION) != "" {
-		Version = os.Getenv(ENV_VERSION)
-	}
-}

internal/server/ascii.go

@@ -2,21 +2,25 @@ package server
 
 import (
 	"fmt"
+	"os"
+	"strings"
 
-	"go.vxn.dev/bbs-go/internal/config"
+	"bbs-go/internal/config"
 )
 
-var WelcomeMessage = `
-+-------------------------------------------+
-|       __    __                            |
-|      / /_  / /_  _____      ____  ____    |
-|     / __ \/ __ \/ ___/_____/ __ \/ __ \   |
-|    / /_/ / /_/ (__  )_____/ /_/ / /_/ /   |
-|   /_.___/_.___/____/      \__, /\____/    |
-|                          /____/           |
-|                                           |
-+-------------------------------------------+
-vxn-dev bbs-go service (` + config.Version + `)
-telnet ` + config.Host + ` ` + fmt.Sprintf("%d", config.Port) + `
+var WelcomeMessage string
 
-`
+func LoadMOTD(path string) error {
+	content, err := os.ReadFile(path)
+	if err != nil {
+		return err
+	}
+
+	msg := string(content)
+	msg = strings.ReplaceAll(msg, "{{VERSION}}", config.Version)
+	msg = strings.ReplaceAll(msg, "{{HOST}}", config.Host)
+	msg = strings.ReplaceAll(msg, "{{PORT}}", fmt.Sprintf("%d", config.Port))
+
+	WelcomeMessage = msg
+	return nil
+}

internal/server/errors.go

@@ -5,5 +5,5 @@ import (
 )
 
 var (
-	ErrShutdownStarted = errors.New("the server shutdown process has been already started")
+	ErrShutdownStarted = errors.New("The server shutdown process has been already started")
 )