securitylib/enums/
badge_type.rs

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use std::fmt;
use std::fmt::Formatter;
use std::str;

use serde::Deserialize;
use serde::Serialize;

#[cfg(feature = "diesel")]
use {
    diesel::{deserialize, not_none, serialize},
    diesel::{AsExpression, FromSqlRow},
    diesel::backend::Backend,
    diesel::deserialize::FromSql,
    diesel::pg::Pg,
    diesel::serialize::{IsNull, Output, ToSql},
    diesel::types::Varchar,
    std::io::Write,
};

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
#[cfg_attr(
feature = "diesel",
derive(AsExpression, FromSqlRow),
sql_type = "Varchar"
)]

pub enum BadgeType {
    Admin,
    TeacherPerm,
    TeacherTemp,
    Student,
    StaffPerm,
    StaffTemp,
    Visitor,
    Other,
    Undefined,

}
impl fmt::Display for BadgeType {
    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
        write!(f, "{:?}", self)
    }
}
impl Default for BadgeType {
    fn default() -> Self {
        BadgeType::Undefined
    }
}


#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for BadgeType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            BadgeType::Admin => out.write_all(b"Admin")?,
            BadgeType::TeacherPerm => out.write_all(b"TeacherPerm")?,
            BadgeType::TeacherTemp => out.write_all(b"TeacherTemp")?,
            BadgeType::Student => out.write_all(b"Student")?,
            BadgeType::StaffPerm => out.write_all(b"StaffPerm")?,
            BadgeType::StaffTemp => out.write_all(b"StaffTemp")?,
            BadgeType::Visitor => out.write_all(b"Visitor")?,
            BadgeType::Other => out.write_all(b"Other")?,
            BadgeType::Undefined => out.write_all(b"Undefined")?,

        }
        Ok(IsNull::No)
    }
}


#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for BadgeType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Admin" => Ok(BadgeType::Admin),
            b"TeacherPerm" => Ok(BadgeType::TeacherPerm),
            b"TeacherTemp" => Ok(BadgeType::TeacherTemp),
            b"Student" => Ok(BadgeType::Student),
            b"StaffPerm" => Ok(BadgeType::StaffPerm),
            b"StaffTemp" => Ok(BadgeType::StaffTemp),
            b"Visitor" => Ok(BadgeType::Visitor),
            b"Other" => Ok(BadgeType::Other),
            b"Undefined" => Ok(BadgeType::Undefined),

            _ => Err("Unrecognized enum variant".into()),
        }
    }
}