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user-vo.go
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/
user-vo.go
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package valueObjects
import (
"context"
"encoding/json"
"fmt"
"reflect"
"regexp"
"strconv"
"time"
"github.com/fatih/structs"
"github.com/go-playground/validator/v10"
"github.com/go-redis/redis/v8"
"github.com/nashirkra/Ticketing-Applications/entity"
"github.com/nashirkra/Ticketing-Applications/helper"
)
type UserVO interface {
GetUser(ctx context.Context, c *redis.Client, key string) (entity.User, error)
GetAllUser(ctx context.Context, c *redis.Client) ([]entity.User, error)
InsertUser(ctx context.Context, c *redis.Client) (int64, error)
UpdateUser(ctx context.Context, c *redis.Client) (int64, error)
FindUser(ctx context.Context, c *redis.Client, value string) error
}
type User struct {
ID int `json:"id,string"`
Username string `json:"username" validate:"username"`
Fullname string `json:"fullname"`
Email string `json:"email" validate:"email"`
// EmailVerifiedAt string `json:"email_verified_at"`
Password string `json:"password"`
Role string `json:"role"`
DeletedAt int64 `json:"deleted_at,string"`
CreatedAt int64 `json:"created_at,string"`
UpdatedAt int64 `json:"updated_at,string"`
}
type userVO struct {
user *entity.User
validator *validator.Validate
}
func NewUserVO(u *entity.User) UserVO {
v := validator.New()
v.RegisterValidation("username", usernameVal)
v.RegisterValidation("email", emailVal)
return &userVO{
user: u,
validator: v,
}
}
func usernameVal(fl validator.FieldLevel) bool {
return len(fl.Field().String()) > 4
}
func emailVal(fl validator.FieldLevel) bool {
emailRegex := regexp.MustCompile("^[a-zA-Z0-9.!#$%&'*+\\/=?^_`{|}~-]+@[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)*$")
if len(fl.Field().String()) < 3 && len(fl.Field().String()) > 254 {
return false
}
if !emailRegex.MatchString(fl.Field().String()) {
return false
}
// parts := strings.Split(fl.Field().String(), "@")
// mx, err := net.LookupMX(parts[1])
// if err != nil || len(mx) == 0 {
// return false
// }
return true
}
// set time UTC
func idn() time.Time {
return helper.TimeIn("Jakarta")
}
// Insert User to Redis with initial key: user_[id]
func (u *userVO) InsertUser(ctx context.Context, c *redis.Client) (int64, error) {
// First, validate all form
err := u.validator.Struct(u.user)
if err != nil {
return 0, err
}
if len(u.user.Fullname) < 3 {
return 0, errs("Fullname Required")
}
if len(u.user.Password) < 6 {
return 0, errs("Password Required minimum 6 Character")
}
if u.user.Role != "admin" {
if u.user.Role != "creator" {
if u.user.Role != "participant" {
return 0, errs("error type Role User")
}
}
}
// validate Unique Key for Username & Email
uk, erruk := CheckUnique(ctx, c, "uk_user", u.user.Username)
if erruk == nil {
if len(uk) > 0 {
return 0, fmt.Errorf("username is already in use, please choose another username of at least 6 characters")
}
}
uk, erruk = CheckUnique(ctx, c, "uk_user", u.user.Email)
if erruk == nil {
if len(uk) > 0 {
return 0, fmt.Errorf("email is already in use, please choose another email")
}
}
// get index user_[id]
keyFound, err := GetIndex(ctx, c, "idx_user")
if err != nil {
keyFound = 0
}
keyFound++
// generate key
key := "user_" + strconv.Itoa(keyFound)
// create new struct from destination interface to define autofill value
// thanks to Fatih for usefull utilities "github.com/fatih/structs"
s := structs.New(u.user)
// fill ID value
id := s.Field("ID")
id.Set(keyFound)
// fill form timestamp for redis
createdAt := s.Field("CreatedAt")
createdAt.Set(idn().UnixNano())
updatedAt := s.Field("UpdatedAt")
updatedAt.Set(idn().UnixNano())
// insert All field
res, err := c.HSet(ctx, key, s.Map()).Result()
if err != nil {
return 1, err
}
uk_user := []string{key, u.user.Username, u.user.Email}
b, err := json.Marshal(uk_user)
if err != nil {
return 1, err
}
_ = AddUnique(ctx, c, "uk_user", string(b))
_ = SetIndex(ctx, c, "idx_user", keyFound)
// result, err := fmt.Printf("result: %+v\nindexAdd: %+v\nuniqueAdd: %+v\nuniqueAdd: %+v\n", res, indexAdd, uniqueAdd1, uniqueAdd2)
newUser, err := u.GetUser(ctx, c, key)
if err != nil {
return 0, err
}
u.user = &newUser
return res, err
}
func (u *userVO) UpdateUser(ctx context.Context, c *redis.Client) (int64, error) {
if u.user.ID == 0 {
return 0, errs("User ID not match")
}
// get key from user
key := "user_" + strconv.Itoa(u.user.ID)
// get previous data
oldData, err := u.GetUser(ctx, c, key)
if err != nil {
return 0, err
}
// define new value to be update
// this method is taken to solve problems
// when set new timestamp and determine null data
// which will overwrite old data on redis
// thanks to Fatih for usefull utilities "github.com/fatih/structs"
s := structs.New(u.user)
sOld := structs.New(oldData)
for _, f := range s.Fields() {
// fmt.Printf("field: %+v (%+v)\n", f.Name(), f.Value())
if f.IsExported() {
// fmt.Printf("value : %+v\n", f.Value())
// fmt.Printf("is zero : %+v\n", f.IsZero())
// otherwise value will not be updated, define it with old value
if f.IsZero() {
if f.Name() == "UpdatedAt" {
// update timestamp
// f.Set(idn().Format(time.RFC3339))
f.Set(idn().UnixNano())
} else {
// set old data on zero form
f.Set(sOld.Field(f.Name()).Value())
}
// fmt.Printf("(result of %+v:%+v)\n", f.Name(), fv)
}
}
}
// test check fields
// fmt.Printf("%#v", s.Map())
// Re-validate all values
err = u.validator.Struct(u.user)
if err != nil {
return 0, err
}
if len(u.user.Fullname) < 3 {
return 0, errs("Fullname Required")
}
if len(u.user.Password) < 6 {
return 0, errs("Password Required minimum 6 Character")
}
if u.user.Role != "admin" {
if u.user.Role != "creator" {
if u.user.Role != "participant" {
return 0, errs("error type Role User")
}
}
}
// if Username & Email will be updated and this's validated
// we must remove old data from redis
usernameUpdate := false
emailUpdate := false
// validate Unique Key for Username & Email if will be updated
if s.Field("Username").Value().(string) != oldData.Username {
uk, erruk := CheckUnique(ctx, c, "uk_user", s.Field("Username").Value().(string))
if erruk == nil {
if len(uk) > 0 {
return 0, fmt.Errorf("username is already in use, please choose another username of at least 6 characters")
}
}
usernameUpdate = true
// fmt.Printf("new Username: %#v, old username: %#v", s.Field("Username").Value(), oldData["Username"])
}
if s.Field("Email").Value().(string) != oldData.Email {
uk, erruk := CheckUnique(ctx, c, "uk_user", s.Field("Email").Value().(string))
if erruk == nil {
if len(uk) > 0 {
return 0, fmt.Errorf("email is already in use, please choose another email")
}
}
emailUpdate = true
// fmt.Printf("new Email: %#v, old Email: %#v", s.Field("Email").Value(), oldData["Email"])
}
// insert All field
res, err := c.HSet(ctx, key, s.Map()).Result()
if err != nil {
return 1, err
}
if usernameUpdate || emailUpdate {
uk_user := []string{key, s.Field("Username").Value().(string), s.Field("Email").Value().(string)}
b, err := json.Marshal(uk_user)
if err != nil {
return 1, err
}
old_uk_user := []string{key, oldData.Username, oldData.Email}
old_b, err := json.Marshal(old_uk_user)
if err != nil {
return 1, err
}
// add new username and/or email
res += AddUnique(ctx, c, "uk_user", string(b)).Val()
// remove old username and/or email
res += DelUnique(ctx, c, "uk_user", string(old_b)).Val()
}
updatedUser, err := u.GetUser(ctx, c, key)
if err != nil {
return 0, err
}
u.user = &updatedUser
// res = int64(1)
return res, err
}
// find user by username/email (from uniquekey of user table)
func (u *userVO) FindUser(ctx context.Context, c *redis.Client, value string) error {
found, err := CheckUnique(ctx, c, "uk_user", value)
if err != nil {
return err
}
var res []string
if len(found) > 0 {
err = json.Unmarshal([]byte(found[0]), &res)
if err != nil {
return err
}
if len(res) > 0 {
*u.user, err = u.GetUser(ctx, c, res[0])
if err != nil {
return fmt.Errorf("%+v", err)
}
}
}
//
return nil
}
func (u *userVO) GetUser(ctx context.Context, c *redis.Client, key string) (entity.User, error) {
var data entity.User
var t1 time.Time
var t2 time.Time
res, err := c.HGetAll(ctx, key).Result()
if err != nil {
return data, err
}
t0 := time.Unix(0, strToint64(res["DeletedAt"]))
if !t0.IsZero() && strToint64(res["DeletedAt"]) > 0 {
res = nil
return data, errs("deleted")
}
t1 = time.Unix(0, strToint64(res["CreatedAt"]))
t2 = time.Unix(0, strToint64(res["UpdatedAt"]))
b, err := json.Marshal(res)
if err != nil {
fmt.Printf("(GetUser[1]:%s)", err)
}
data.CreatedAt = t1.UnixNano()
data.UpdatedAt = t2.UnixNano()
data.Password = res["Password"]
// get previous data
// Unmarshal or Decode the JSON to the interface.
err = json.Unmarshal(b, &data)
// fmt.Println(data)
return data, err
}
func (u *userVO) GetAllUser(ctx context.Context, c *redis.Client) ([]entity.User, error) {
var data []entity.User
keys, _, err := c.Scan(ctx, 0, "user_*", 0).Result()
if err != nil {
return data, err
}
for _, v := range keys {
user, err := u.GetUser(ctx, c, v)
if err != nil {
fmt.Printf("(%+v:%s)\n", v, err)
} else {
data = append(data, user)
}
}
return data, nil
}
func errs(message string) error {
return fmt.Errorf("%s", message)
}
// Set index for key
// set key idx_user for user table
// set key idx_event for event table
// set key idx_transaction for transaction table
func SetIndex(ctx context.Context, c *redis.Client, key string, value int) *redis.Cmd {
return c.Do(ctx, "SET", key, value)
}
// Get index for key
// set key idx_user for user table
// set key idx_event for event table
// set key idx_transaction for transaction table
func GetIndex(ctx context.Context, c *redis.Client, key string) (int, error) {
idxUser := c.Do(ctx, "GET", key).Val()
keyFound, err := strconv.Atoi(reflect.ValueOf(idxUser).String())
if err != nil {
return 0, nil
}
return keyFound, err
}
// Add Unique key
// set key uk_user[FieldName] for user table
// set key uk_event[FieldName] for event table
// set key uk_transaction[FieldName] for transaction table
func AddUnique(ctx context.Context, c *redis.Client, key string, value string) *redis.IntCmd {
return c.SAdd(ctx, key, value)
}
// Remove Unique key
// set key uk_user[FieldName] for user table
// set key uk_event[FieldName] for event table
// set key uk_transaction[FieldName] for transaction table
func DelUnique(ctx context.Context, c *redis.Client, key string, value string) *redis.IntCmd {
return c.SRem(ctx, key, value)
}
// "*\"fathimzr\"*"
func CheckUnique(ctx context.Context, c *redis.Client, key string, value string) ([]string, error) {
keys, _, err := c.SScan(ctx, key, uint64(c.Options().DB), "*\""+value+"\"*", 0).Result()
return keys, err
}
func strToint64(value string) int64 {
r, err := strconv.ParseInt(value, 10, 64)
if err != nil {
// fmt.Printf("error %+v:%#v\n", r, err)
return int64(0)
}
return r
}