eventlib/enums/
privacy.rs

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use serde::Deserialize;
use serde::Serialize;
use std::fmt;
use std::fmt::Formatter;
use std::str;
#[cfg(feature = "diesel")]
use {
    diesel::backend::Backend,
    diesel::deserialize::FromSql,
    diesel::pg::Pg,
    diesel::serialize::{IsNull, Output, ToSql},
    diesel::sql_types::VarChar,
    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),
    sql_type = "Varchar"
)]

pub enum Privacy {
    Public,
    Private,
    Hidden,
    Secure,
    All,
    Undefined,
}

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

#[cfg(feature = "diesel")]
impl ToSql<VarChar, Pg> for Privacy {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            Privacy::Public => out.write_all(b"Public")?,
            Privacy::Private => out.write_all(b"Private")?,
            Privacy::Hidden => out.write_all(b"Hidden")?,
            Privacy::Secure => out.write_all(b"Secure")?,
            Privacy::All => out.write_all(b"All")?,
            Privacy::Undefined => out.write_all(b"Undefined")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<VarChar, Pg> for Privacy {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Public" => Ok(Privacy::Public),
            b"Private" => Ok(Privacy::Private),
            b"Hidden" => Ok(Privacy::Hidden),
            b"Secure" => Ok(Privacy::Secure),
            b"All" => Ok(Privacy::All),
            b"Undefined" => Ok(Privacy::Undefined),
            _ => Err("Unrecognized enum variant".into()),
        }
    }
}