#[derive(Debug, Clone, Copy, PartialEq, Eq, serde::Serialize, serde::Deserialize)]
#[serde(rename_all = "lowercase")]
pub enum Role { User, Admin }

impl std::fmt::Display for Role {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        match self {
            Role::User => write!(f, "user"),
            Role::Admin => write!(f, "admin"),
        }
    }
}

impl std::str::FromStr for Role {
    type Err = String;
    fn from_str(s: &str) -> Result<Self, Self::Err> {
        match s {
            "user" => Ok(Role::User),
            "admin" => Ok(Role::Admin),
            other => Err(format!("Unknown role: {other}")),
        }
    }
}