crates/db_views_actor/src/community_follower_view.rs

   1 use crate::structs::CommunityFollowerView;
   2 use diesel::{result::Error, ExpressionMethods, QueryDsl};
   3 use diesel_async::RunQueryDsl;
   4 use lemmy_db_schema::{
   5   newtypes::{CommunityId, PersonId},
   6   schema::{community, community_follower, person},
   7   source::{
   8     community::{Community, CommunitySafe},
   9     person::{Person, PersonSafe},
  10   },
  11   traits::{ToSafe, ViewToVec},
  12   utils::{get_conn, DbPool},
  13 };
  14
  15 type CommunityFollowerViewTuple = (CommunitySafe, PersonSafe);
  16
  17 impl CommunityFollowerView {
  18   pub async fn for_community(pool: &DbPool, community_id: CommunityId) -> Result<Vec<Self>, Error> {
  19     let conn = &mut get_conn(pool).await?;
  20     let res = community_follower::table
  21       .inner_join(community::table)
  22       .inner_join(person::table)
  23       .select((
  24         Community::safe_columns_tuple(),
  25         Person::safe_columns_tuple(),
  26       ))
  27       .filter(community_follower::community_id.eq(community_id))
  28       .order_by(community::title)
  29       .load::<CommunityFollowerViewTuple>(conn)
  30       .await?;
  31
  32     Ok(Self::from_tuple_to_vec(res))
  33   }
  34
  35   pub async fn for_person(pool: &DbPool, person_id: PersonId) -> Result<Vec<Self>, Error> {
  36     let conn = &mut get_conn(pool).await?;
  37     let res = community_follower::table
  38       .inner_join(community::table)
  39       .inner_join(person::table)
  40       .select((
  41         Community::safe_columns_tuple(),
  42         Person::safe_columns_tuple(),
  43       ))
  44       .filter(community_follower::person_id.eq(person_id))
  45       .filter(community::deleted.eq(false))
  46       .filter(community::removed.eq(false))
  47       .order_by(community::title)
  48       .load::<CommunityFollowerViewTuple>(conn)
  49       .await?;
  50
  51     Ok(Self::from_tuple_to_vec(res))
  52   }
  53 }
  54
  55 impl ViewToVec for CommunityFollowerView {
  56   type DbTuple = CommunityFollowerViewTuple;
  57   fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
  58     items
  59       .into_iter()
  60       .map(|a| Self {
  61         community: a.0,
  62         follower: a.1,
  63       })
  64       .collect::<Vec<Self>>()
  65   }
  66 }