Send Verification Email

#[post("/verify/sendMail", format = "application/json", data = "<email>")]
pub fn send_mail(email: Json<Email>) -> Json<Response<String>> {
    println!("Email: {}", email.email);

    // Check if email is already in use
    let user = true; // Database check would go here
    if user {
        return Json(Response {
            data: "ERR_USER_EXISTS".to_string(),
            status: 400,
            message: "E-Mail Adresse wird bereits verwendet, möchtest du stattdessen deinen Account wechseln?".to_string(),
        });
    }

    let email_regex = regex::Regex::new(r"^[a-zA-Z0-9_.+-][email protected]$").unwrap();
    // Check if the email is valid
    if !email_regex.is_match(&email.email) {
        return Json(Response {
            data: "FAILTHIS".to_string(),
            status: 400,
            message: "Ungültige E-Mail Adresse".to_string(),
        });
    }

    Json(Response {
        data: "SUCCESS".to_string(),
        status: 200,
        message: "E-Mail wurde erfolgreich versendet".to_string(),
    })
}

#[derive(Deserialize)]
pub struct Email {
    pub email: String,
}

#[derive(Serialize)]
pub struct Response<T> {
    pub data: T,
    pub status: u16,
    pub message: String,
}