refactor: split utils into smaller files

internal/utils/user_utils.go

@@ -0,0 +1,82 @@
+package utils
+
+import (
+	"errors"
+	"strings"
+	"tinyauth/internal/config"
+)
+
+func ParseUsers(users string) ([]config.User, error) {
+	var usersParsed []config.User
+
+	userList := strings.Split(users, ",")
+
+	if len(userList) == 0 {
+		return []config.User{}, errors.New("invalid user format")
+	}
+
+	for _, user := range userList {
+		parsed, err := ParseUser(user)
+		if err != nil {
+			return []config.User{}, err
+		}
+		usersParsed = append(usersParsed, parsed)
+	}
+
+	return usersParsed, nil
+}
+
+func GetUsers(conf string, file string) ([]config.User, error) {
+	var users string
+
+	if conf == "" && file == "" {
+		return []config.User{}, nil
+	}
+
+	if conf != "" {
+		users += conf
+	}
+
+	if file != "" {
+		contents, err := ReadFile(file)
+		if err == nil {
+			if users != "" {
+				users += ","
+			}
+			users += ParseFileToLine(contents)
+		}
+	}
+
+	return ParseUsers(users)
+}
+
+func ParseUser(user string) (config.User, error) {
+	if strings.Contains(user, "$$") {
+		user = strings.ReplaceAll(user, "$$", "$")
+	}
+
+	userSplit := strings.Split(user, ":")
+
+	if len(userSplit) < 2 || len(userSplit) > 3 {
+		return config.User{}, errors.New("invalid user format")
+	}
+
+	for _, userPart := range userSplit {
+		if strings.TrimSpace(userPart) == "" {
+			return config.User{}, errors.New("invalid user format")
+		}
+	}
+
+	if len(userSplit) == 2 {
+		return config.User{
+			Username: strings.TrimSpace(userSplit[0]),
+			Password: strings.TrimSpace(userSplit[1]),
+		}, nil
+	}
+
+	return config.User{
+		Username:   strings.TrimSpace(userSplit[0]),
+		Password:   strings.TrimSpace(userSplit[1]),
+		TotpSecret: strings.TrimSpace(userSplit[2]),
+	}, nil
+}