mediclib/enums/
form.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 Form {
    AutoInjector,
    Liquid,
    Tablet,
    Capsule,
    Topical,
    Suppositorie,
    Drop,
    Inhaler,
    Injection,
    Implant,
    Patche,
    Undefined,

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

impl Default for Form {
    fn default() -> Self {
        Form::Undefined
    }
}
#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for Form {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            Form::AutoInjector => out.write_all(b"AutoInjector")?,
            Form::Liquid => out.write_all(b"Liquid")?,
            Form::Tablet => out.write_all(b"Tablet")?,
            Form::Capsule => out.write_all(b"Capsule")?,
            Form::Topical => out.write_all(b"Topical")?,
            Form::Suppositorie => out.write_all(b"Suppositorie")?,
            Form::Drop => out.write_all(b"Drop")?,
            Form::Inhaler => out.write_all(b"Inhaler")?,
            Form::Injection => out.write_all(b"Injection")?,
            Form::Implant => out.write_all(b"Implant")?,
            Form::Patche => out.write_all(b"Patche")?,
            Form::Undefined => out.write_all(b"Undefined")?,
        }
        Ok(IsNull::No)
    }
}


#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for Form {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"AutoInjector" => Ok(Form::AutoInjector),
            b"Liquid" => Ok(Form::Liquid),
            b"Tablet" => Ok(Form::Tablet),
            b"Capsule" => Ok(Form::Capsule),
            b"Topical" => Ok(Form::Topical),
            b"Suppositorie" => Ok(Form::Suppositorie),
            b"Drop" => Ok(Form::Drop),
            b"Inhaler" => Ok(Form::Inhaler),
            b"Injection" => Ok(Form::Injection),
            b"Implant" => Ok(Form::Implant),
            b"Patche" => Ok(Form::Patche),
            b"Undefined" => Ok(Form::Undefined),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}