paymentlib/enums/
gateway_type.rs

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

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

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
#[cfg_attr(feature = "diesel", derive(AsExpression, FromSqlRow))]
#[cfg_attr(feature = "diesel", sql_type = "Varchar")]
pub enum GatewayType {
    Westpac,
    NAB,
}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for GatewayType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            GatewayType::Westpac => out.write_all(b"Westpac")?,
            GatewayType::NAB => out.write_all(b"NAB")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for GatewayType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Westpac" => Ok(GatewayType::Westpac),
            b"NAB" => Ok(GatewayType::NAB),

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