save username in cookie

Lab01/app/database/database.go

@@ -30,14 +30,31 @@ func (db *Database) CreateUser(username string, password string) error {
 	return result.Error
 }
 
-func (db *Database) LoginUser(username string, password string) (bool, error) {
+func (db *Database) LoginUser(username string, password string) bool {
 	user := User{Username: username, Password: password}
 	result := db.ORM.Where("username = ? AND password = ?", username, password).Find(&user)
-	if result.Error != nil {
-		return false, result.Error
-	}
 	if result.RowsAffected == 1 {
-		return true, nil
+		db.ORM.Model(&user).Update("logged_in", true)
+		return true
 	}
-	return false, nil
+	return false
+}
+
+func (db *Database) LogoutUser(username string) bool {
+	user := User{Username: username}
+	result := db.ORM.Where("username = ? and logged_in = ?", username, true).Find(&user)
+	if result.RowsAffected == 1 {
+		db.ORM.Model(&user).Update("logged_in", false)
+		return true
+	}
+	return false
+}
+
+func (db *Database) UserIsLoggedIn(username string) bool {
+	user := User{Username: username}
+	result := db.ORM.Where("username = ? and logged_in = ?", username, true).Find(&user)
+	if result.RowsAffected == 1 {
+		return true
+	}
+	return false
 }