#[derive(Debug, Clone, PartialEq, Eq)]
pub struct SessionKey(pub String);

impl TryFrom<String> for SessionKey {
    type Error = &'static str;

    fn try_from(val: String) -> Result<Self, Self::Error> {
        if val.len() > 4064 {
            return Err("session key exceeds 4064 bytes");
        }
        if val.contains('\0') {
            return Err("session key contains null bytes");
        }
        Ok(SessionKey(val))
    }
}

impl AsRef<str> for SessionKey {
    fn as_ref(&self) -> &str {
        &self.0
    }
}

impl From<SessionKey> for String {
    fn from(key: SessionKey) -> Self {
        key.0
    }
}