chemlib/enums/
effect_type.rs

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use serde::Deserialize;
use serde::Serialize;
use std::io::Write;
use strum_macros::{Display, EnumString};

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

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize, Display, EnumString)]
#[cfg_attr(feature = "diesel", derive(AsExpression, FromSqlRow))]
#[cfg_attr(feature = "diesel", sql_type = "Varchar")]
pub enum EffectType {
    Light,
    Smoke,
    Spark,
    Explosion,
    Glow,
    Solidification,
    Crystalization
}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for EffectType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            EffectType::Light => out.write_all(b"Light")?,
            EffectType::Smoke => out.write_all(b"Smoke")?,
            EffectType::Spark => out.write_all(b"Spark")?,
            EffectType::Explosion => out.write_all(b"Explosion")?,
            EffectType::Glow => out.write_all(b"Glow")?,
            EffectType::Solidification => out.write_all(b"Solidification")?,
            EffectType::Crystalization => out.write_all(b"Crystalization")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for EffectType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Light" => Ok(EffectType::Light),
            b"Smoke" => Ok(EffectType::Smoke),
            b"Spark" => Ok(EffectType::Spark),
            b"Explosion" => Ok(EffectType::Explosion),
            b"Glow" => Ok(EffectType::Glow),
            b"Solidification" => Ok(EffectType::Solidification),
            b"Crystalization" => Ok(EffectType::Crystalization),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}