competitionlib/enums/
news_type.rs

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use serde::Deserialize;
use serde::Serialize;
use std::fmt;
use std::fmt::Formatter;
use std::str;
#[cfg(not(feature = "wasm"))]
use {
    diesel::types::Varchar,
    diesel::backend::Backend,
    diesel::deserialize::FromSql,
    diesel::pg::Pg,
    diesel::serialize::{IsNull, Output, ToSql},
    diesel::sql_types::VarChar,
    diesel::{deserialize, not_none, serialize},
    diesel::{AsExpression, FromSqlRow},
    std::io::Write,
};


#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
#[cfg_attr(
not(feature = "wasm"),
derive(AsExpression, FromSqlRow),
sql_type = "Varchar")]

pub enum NewsType {
    General,
    Score,
    Achievement,
    Announcement,
    FinalScore,
    Other,
}


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


#[cfg(not(feature = "wasm"))]
impl ToSql<VarChar, Pg> for NewsType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            NewsType::General => out.write_all(b"General")?,
            NewsType::Score => out.write_all(b"Score")?,
            NewsType::Achievement => out.write_all(b"Achievement")?,
            NewsType::Announcement => out.write_all(b"Announcement")?,
            NewsType::FinalScore => out.write_all(b"FinalScore")?,
            NewsType::Other => out.write_all(b"Other")?,

        }
        Ok(IsNull::No)
    }
}

#[cfg(not(feature = "wasm"))]
impl FromSql<VarChar, Pg> for NewsType {
    fn from_sql (bytes: Option<&<Pg as Backend> ::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"General" => Ok(NewsType::General),
            b"Score" => Ok(NewsType::Score),
            b"Achievement" => Ok(NewsType::Achievement),
            b"Announcement" => Ok(NewsType::Announcement),
            b"FinalScore" => Ok(NewsType::FinalScore),
            b"Other" => Ok(NewsType::Other),
            _ => Err("Unrecognized enum variant".into())
        }
    }

}