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October 31, 2024 09:22
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| package main | |
| import ( | |
| "bufio" | |
| "encoding/json" | |
| "errors" | |
| "fmt" | |
| "log" | |
| "os" | |
| "regexp" | |
| "strings" | |
| ) | |
| const FileName string = "user.json" | |
| type User struct { | |
| Name string `json:"name"` | |
| Email string `json:"email"` | |
| Number string `json:"number"` | |
| } | |
| func main() { | |
| userName, userEmail, userNumber, err := userDetails() | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| newUser := User{ | |
| Name: userName, | |
| Email: userEmail, | |
| Number: userNumber, | |
| } | |
| checkInput, err := newUser.validateInput(userEmail, userName, userNumber) | |
| if err != nil { | |
| log.Fatal(err) | |
| } | |
| if err := newUser.save(checkInput); err != nil { | |
| log.Fatal(err) | |
| } | |
| } | |
| func userDetails() (string, string, string, error) { | |
| reader := bufio.NewReader(os.Stdin) | |
| fmt.Print("Name: ") | |
| userName, err := reader.ReadString('\n') | |
| if err != nil { | |
| return "", "", "", err | |
| } | |
| userName = strings.TrimSpace(userName) | |
| fmt.Print("Email: ") | |
| userEmail, err := reader.ReadString('\n') | |
| if err != nil { | |
| return "", "", "", err | |
| } | |
| userEmail = strings.TrimSpace(userEmail) | |
| fmt.Print("Number: ") | |
| userNumber, err := reader.ReadString('\n') | |
| if err != nil { | |
| return "", "", "", err | |
| } | |
| userNumber = strings.TrimSpace(userNumber) | |
| return userName, userEmail, userNumber, nil | |
| } | |
| func (u *User) validateInput(email, name, number string) (bool, error) { | |
| checkName, err := regexp.MatchString("^[A-Za-z]+$", name) | |
| if err != nil { | |
| return false, err | |
| } | |
| checkEmail, err := regexp.MatchString(`^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$`, email) | |
| if err != nil { | |
| return false, err | |
| } | |
| checkNumber, err := regexp.MatchString(`^07\d{8}$`, number) | |
| if err != nil { | |
| return false, err | |
| } | |
| if checkName && checkEmail && checkNumber { | |
| return true, nil | |
| } | |
| return false, errors.New("validation failed: check name, email, and number formats") | |
| } | |
| func (u *User) save(valid bool) error { | |
| if valid { | |
| file, err := json.MarshalIndent(u, "", " ") | |
| if err != nil { | |
| return err | |
| } | |
| err = os.WriteFile(FileName, file, 0644) | |
| if err != nil { | |
| return err | |
| } | |
| } | |
| return nil | |
| } | |
| // func readJson(string) string { | |
| // } |
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