//
// Husk milter
//
// mail functions
//

use std::ffi::CString;
use sequoia_openpgp::packet::UserID;

pub fn to_userid(rcpt: &CString) -> Option<UserID> {
    match rcpt.to_str() {
        Ok(s) => Some(UserID::from(s)),
        _ => None
    }
}

pub fn to_email(rcpt: &CString) -> Option<String> {
    if let Some(u) = to_userid(rcpt) {
       if let Ok(Some(e)) = u.email() { Some(e.to_string()) }
       else { None }
    } else { None }
}

/// Checks if the parameter has a valid email format.
pub fn is_email(email: &str) -> bool {
    let uid = UserID::from(email);

    if let Ok(Some(e)) = uid.email() {
        e == email
    } else {
        false
    }
}

/// Checks if the parameter has a valid domain format.
pub fn is_domain(domain: &str) -> bool {
    is_email(format!("test@{}", domain).as_str())
}