Add struct, method, construct, composition

go-demo-4/main.go

@@ -1,20 +1,106 @@
 package main
 
 import (
+	"errors"
 	"fmt"
+	"math/rand/v2"
+	"net/url"
+	"time"
 )
 
-func main() {
+type account struct {
-	a := [4]int{1, 2, 3, 4}
+	login    string
-	reverse(&a)
+	password string
-	fmt.Println(a)
+	url      string
-
-	var n *int
-	fmt.Println(*n)
 }
 
-func reverse(arr *[4]int) {
+type accountWithTimeStamp struct {
-	for idx, val := range *arr {
+	createdAt time.Time
-		(*arr)[len(arr)-1-idx] = val
+	updatedAt time.Time
+	account
+}
+
+// метод вывода пароля
+func (acc account) outputPassword() {
+	fmt.Println(acc.login, acc.password, acc.url)
+}
+
+func (acc accountWithTimeStamp) outputPassword() {
+	fmt.Println(acc.login, acc.password, acc.url, acc.createdAt, acc.updatedAt)
+}
+
+// метод генерации пароля
+func (acc *account) generatePassword(n int) {
+	res := make([]rune, n)
+	for i := range res {
+		res[i] = letterRunes[rand.IntN(len(letterRunes))]
 	}
+	acc.password = string(res)
+}
+
+// Создание аккаунта с таймстамп
+func newAccountWithTimeStamp(login, password, urlString string) (*accountWithTimeStamp, error) {
+	_, err := url.ParseRequestURI(urlString)
+	if err != nil {
+		return nil, errors.New("INVALID_URL")
+	}
+	if login == "" {
+		return nil, errors.New("INVALID_LOGIN")
+	}
+	newAcc := &accountWithTimeStamp{
+		createdAt: time.Now(),
+		updatedAt: time.Now(),
+		account: account{
+			login:    login,
+			password: password,
+			url:      urlString,
+		},
+	}
+	if password == "" {
+		newAcc.generatePassword(18)
+	}
+	return newAcc, nil
+}
+
+// создание аккаунта
+/* func newAccount(login, password, urlString string) (*account, error) {
+	_, err := url.ParseRequestURI(urlString)
+	if err != nil {
+		return nil, errors.New("INVALID_URL")
+	}
+	if login == "" {
+		return nil, errors.New("INVALID_LOGIN")
+	}
+	newAcc := &account{
+		login:    login,
+		password: password,
+		url:      urlString,
+	}
+	if password == "" {
+		newAcc.generatePassword(18)
+	}
+	return newAcc, nil
+} */
+
+var letterRunes = []rune("abcdefghijklmnopqrstuvwxyzABCDEFGIJKLMNOPQRSTUVWXYZ1234567890-*!?()#$%&")
+
+func main() {
+	login := promptData("Введите логин: ")
+	password := promptData("Введите пароль: ")
+	url := promptData("Введите URL: ")
+
+	myAccount, err := newAccountWithTimeStamp(login, password, url)
+	if err != nil {
+		fmt.Println("ОШИБКА: Неверный формат URL")
+		return
+	}
+	myAccount.outputPassword()
+}
+
+// функция введения данных
+func promptData(prompt string) string {
+	fmt.Print(prompt)
+	var res string
+	fmt.Scanln(&res)
+	return res
 }

go-demo-4/reverseArr/main.go

@@ -0,0 +1,20 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+	a := [4]int{1, 2, 3, 4}
+	reverse(&a)
+	fmt.Println(a)
+
+	// var n *int
+	// fmt.Println(*n)
+}
+
+func reverse(arr *[4]int) {
+	for idx, val := range *arr {
+		(*arr)[len(arr)-1-idx] = val
+	}
+}