mirror of
https://github.com/LemmyNet/lemmy.git
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88 lines
2.9 KiB
Rust
88 lines
2.9 KiB
Rust
use crate::{
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newtypes::InstanceId,
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schema::{federation_allowlist, federation_blocklist, instance},
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source::instance::{Instance, InstanceForm},
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utils::{get_conn, naive_now, DbPool},
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};
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use diesel::{dsl::insert_into, result::Error, ExpressionMethods, QueryDsl};
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use diesel_async::{AsyncPgConnection, RunQueryDsl};
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impl Instance {
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pub(crate) async fn read_or_create_with_conn(
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conn: &mut AsyncPgConnection,
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domain_: String,
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) -> Result<Self, Error> {
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use crate::schema::instance::domain;
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// First try to read the instance row and return directly if found
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let instance = instance::table
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.filter(domain.eq(&domain_))
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.first::<Self>(conn)
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.await;
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match instance {
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Ok(i) => Ok(i),
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Err(diesel::NotFound) => {
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// Instance not in database yet, insert it
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let form = InstanceForm::builder()
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.domain(domain_)
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.updated(Some(naive_now()))
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.build();
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insert_into(instance::table)
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.values(&form)
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// Necessary because this method may be called concurrently for the same domain. This
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// could be handled with a transaction, but nested transactions arent allowed
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.on_conflict(instance::domain)
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.do_update()
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.set(&form)
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.get_result::<Self>(conn)
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.await
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}
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e => e,
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}
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}
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/// Attempt to read Instance column for the given domain. If it doesnt exist, insert a new one.
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/// There is no need for update as the domain of an existing instance cant change.
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pub async fn read_or_create(pool: &DbPool, domain: String) -> Result<Self, Error> {
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let conn = &mut get_conn(pool).await?;
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Self::read_or_create_with_conn(conn, domain).await
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}
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pub async fn delete(pool: &DbPool, instance_id: InstanceId) -> Result<usize, Error> {
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let conn = &mut get_conn(pool).await?;
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diesel::delete(instance::table.find(instance_id))
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.execute(conn)
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.await
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}
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#[cfg(test)]
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pub async fn delete_all(pool: &DbPool) -> Result<usize, Error> {
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let conn = &mut get_conn(pool).await?;
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diesel::delete(instance::table).execute(conn).await
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}
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pub async fn allowlist(pool: &DbPool) -> Result<Vec<Self>, Error> {
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let conn = &mut get_conn(pool).await?;
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instance::table
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.inner_join(federation_allowlist::table)
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.select(instance::all_columns)
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.get_results(conn)
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.await
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}
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pub async fn blocklist(pool: &DbPool) -> Result<Vec<Self>, Error> {
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let conn = &mut get_conn(pool).await?;
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instance::table
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.inner_join(federation_blocklist::table)
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.select(instance::all_columns)
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.get_results(conn)
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.await
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}
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pub async fn linked(pool: &DbPool) -> Result<Vec<Self>, Error> {
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let conn = &mut get_conn(pool).await?;
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instance::table
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.left_join(federation_blocklist::table)
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.filter(federation_blocklist::id.is_null())
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.select(instance::all_columns)
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.get_results(conn)
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.await
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}
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}
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