crates/db_views_actor/src/community_follower_view.rs

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