timesheetlib/enums/
payslip_status.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 PayslipStatus {
    Draft,
    Confirmed,
    Awaiting,
    Processed,
    ParshalyPayed,
    Payed,
    Finalised,
    Historical,
    Undefined,

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


#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for PayslipStatus {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            PayslipStatus::Draft => out.write_all(b"Draft")?,
            PayslipStatus::Confirmed => out.write_all(b"Confirmed")?,
            PayslipStatus::Awaiting => out.write_all(b"Awaiting")?,
            PayslipStatus::Processed => out.write_all(b"Processed")?,
            PayslipStatus::ParshalyPayed => out.write_all(b"ParshalyPayed")?,
            PayslipStatus::Payed => out.write_all(b"Payed")?,
            PayslipStatus::Finalised => out.write_all(b"Finalised")?,
            PayslipStatus::Historical => out.write_all(b"Historical")?,
            PayslipStatus::Undefined => out.write_all(b"Undefined")?,

        }
        Ok(IsNull::No)
    }
}


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

            b"Draft" => Ok(PayslipStatus::Draft),
            b"Confirmed" => Ok(PayslipStatus::Confirmed),
            b"Awaiting" => Ok(PayslipStatus::Awaiting),
            b"Processed" => Ok(PayslipStatus::Processed),
            b"ParshalyPayed" => Ok(PayslipStatus::ParshalyPayed),
            b"Payed" => Ok(PayslipStatus::Payed),
            b"Finalised" => Ok(PayslipStatus::Finalised),
            b"Historical" => Ok(PayslipStatus::Historical),
            b"Undefined" => Ok(PayslipStatus::Undefined),

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