eventlib/enums/
scenario_type.rs

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use serde::Deserialize;
use serde::Serialize;
#[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},
    diesel::{AsExpression, FromSqlRow},
    std::io::Write,
};

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
#[cfg_attr(
    feature = "diesel",
    derive(AsExpression, FromSqlRow),
    sql_type = "Varchar"
)]
pub enum ScenarioType {
    Video,
    FaceToFace,
    OnlineCompetition,
    Conference,
    VRActivity,
    Individual,
    Broadcast,
    Quest,
    ParentTeacherMeeting,
    CommonLesson,
}

#[cfg(feature = "diesel")]
impl ToSql<Varchar, Pg> for ScenarioType {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        match *self {
            ScenarioType::Video => out.write_all(b"Video")?,
            ScenarioType::FaceToFace => out.write_all(b"FaceToFace")?,
            ScenarioType::OnlineCompetition => out.write_all(b"OnlineCompetition")?,
            ScenarioType::Conference => out.write_all(b"Conference")?,
            ScenarioType::VRActivity => out.write_all(b"VRActivity")?,
            ScenarioType::Individual => out.write_all(b"Individual")?,
            ScenarioType::Broadcast => out.write_all(b"Broadcast")?,
            ScenarioType::Quest => out.write_all(b"Quest")?,
            ScenarioType::ParentTeacherMeeting => out.write_all(b"ParentTeacherMeeting")?,
            ScenarioType::CommonLesson => out.write_all(b"CommonLesson")?,
        }
        Ok(IsNull::No)
    }
}

#[cfg(feature = "diesel")]
impl FromSql<Varchar, Pg> for ScenarioType {
    fn from_sql(bytes: Option<&<Pg as Backend>::RawValue>) -> deserialize::Result<Self> {
        match not_none!(bytes) {
            b"Video" => Ok(ScenarioType::Video),
            b"FaceToFace" => Ok(ScenarioType::FaceToFace),
            b"OnlineCompetition" => Ok(ScenarioType::OnlineCompetition),
            b"Conference" => Ok(ScenarioType::Conference),
            b"VRActivity" => Ok(ScenarioType::VRActivity),
            b"Individual" => Ok(ScenarioType::Individual),
            b"Broadcast" => Ok(ScenarioType::Broadcast),
            b"Quest" => Ok(ScenarioType::Quest),
            b"ParentTeacherMeeting" => Ok(ScenarioType::ParentTeacherMeeting),
            b"CommonLesson" => Ok(ScenarioType::CommonLesson),

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

impl Default for ScenarioType {
    fn default() -> ScenarioType {
        ScenarioType::FaceToFace
    }
}