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//
// Copyright (c) 2020-2021 science+computing ag and other contributors
//
// This program and the accompanying materials are made
// available under the terms of the Eclipse Public License 2.0
// which is available at https://www.eclipse.org/legal/epl-2.0/
//
// SPDX-License-Identifier: EPL-2.0
//
use anyhow::Error;
use anyhow::Result;
use diesel::prelude::*;
use diesel::PgConnection;
use crate::schema::envvars;
use crate::schema::envvars::*;
use crate::util::EnvironmentVariableName;
#[derive(Debug, Identifiable, Queryable)]
#[table_name = "envvars"]
pub struct EnvVar {
pub id: i32,
pub name: String,
pub value: String,
}
#[derive(Insertable)]
#[table_name = "envvars"]
struct NewEnvVar<'a> {
pub name: &'a str,
pub value: &'a str,
}
impl EnvVar {
pub fn create_or_fetch(
database_connection: &PgConnection,
k: &EnvironmentVariableName,
v: &str,
) -> Result<EnvVar> {
let new_envvar = NewEnvVar {
name: k.as_ref(),
value: v,
};
database_connection.transaction::<_, Error, _>(|| {
diesel::insert_into(envvars::table)
.values(&new_envvar)
.on_conflict_do_nothing()
.execute(database_connection)?;
dsl::envvars
.filter(name.eq(k.as_ref()).and(value.eq(v)))
.first::<EnvVar>(database_connection)
.map_err(Error::from)
})
}
}
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