WIP

assets/template/login.html

@@ -30,7 +30,7 @@
             <img class="mb-4" src="/assets/img/keyboard.svg" alt="" width="64">
 
             <div class="form-floating">
-                <input type="text" class="form-control" id="username" name="username" placeholder="User Name">
+                <input type="text" class="form-control" id="username" name="username" placeholder="User Name" value="{{.username}}">
                 <label for="username">User Name</label>
             </div>
             <div class="form-floating">

web/auth.go

@@ -10,7 +10,8 @@ import (
 )
 
 const (
-	userkey  = "authorized_user"
+	userKey  = "authorized_user"
+	nameKey  = "last_login"
 	loginKey = "login_msg"
 )
 
@@ -41,7 +42,8 @@ func login(c *gin.Context) {
 	}
 
 	// Save the username in the session
-	session.Set(userkey, username)
+	session.Set(userKey, username)
+	session.Set(nameKey, username)
 
 	if err := session.Save(); err != nil {
 		leftLoginMsg(c, "Failed to save session data")
@@ -55,9 +57,9 @@ func login(c *gin.Context) {
 func logout(c *gin.Context) {
 	session := sessions.Default(c)
 
-	user := session.Get(userkey)
+	user := session.Get(userKey)
 	if user != nil {
-		session.Delete(userkey)
+		session.Delete(userKey)
 		session.Save()
 	}
 
@@ -68,7 +70,7 @@ func logout(c *gin.Context) {
 // AuthRequired is a simple middleware to check the session
 func AuthRequired(c *gin.Context) {
 	session := sessions.Default(c)
-	user := session.Get(userkey)
+	user := session.Get(userKey)
 
 	if user == nil {
 		leftLoginMsg(c, "Not authorized, login first")
@@ -88,9 +90,15 @@ func loginPage(c *gin.Context) {
 		msg = "Login first"
 	}
 
+	username := session.Get(nameKey)
+	if username == nil {
+		username = ""
+	}
+
 	c.HTML(http.StatusOK, "login.html",
 		gin.H{
 			"msg":       msg,
+			"username":  username,
 			"csrfField": csrf.TemplateField(c.Request),
 		},
 	)

web/user.go

@@ -13,7 +13,7 @@ import (
 )
 
 const (
-	userFileName = "user.db"
+	userFileName = "./user.db"
 )
 
 type UserRecord struct {
@@ -37,18 +37,27 @@ func addUser(username []byte, passwd []byte) {
 	exist := false
 	file, err := os.ReadFile(userFileName)
 
-	if (err == nil) && (json.Unmarshal(file, users) == nil) {
-		// update the existing user if it exists
-		for _, u := range users {
-			if bytes.Equal(u.User, username) {
-				u.Seed = seed
-				u.Passwd = hashed
-				exist = true
-				break
-			}
+	if err != nil {
+		log.Println("Failed to read user.db file", err)
+		goto nonexist
+	}
+
+	if err = json.Unmarshal(file, &users); err != nil {
+		log.Println("Failed to unmarsh file", err)
+		goto nonexist
+	}
+
+	// update the existing user if it exists
+	for i, u := range users {
+		if bytes.Equal(u.User, username) {
+			users[i].Seed = seed
+			users[i].Passwd = hashed
+			exist = true
+			break
 		}
 	}
 
+nonexist:
 	if !exist {
 		users = append(users, UserRecord{username, seed, hashed})
 	}