crates/db_views_moderator/src/mod_hide_community_view.rs

   1 use crate::structs::{ModHideCommunityView, ModlogListParams};
   2 use diesel::{
   3   result::Error,
   4   BoolExpressionMethods,
   5   ExpressionMethods,
   6   IntoSql,
   7   JoinOnDsl,
   8   NullableExpressionMethods,
   9   QueryDsl,
  10 };
  11 use diesel_async::RunQueryDsl;
  12 use lemmy_db_schema::{
  13   newtypes::PersonId,
  14   schema::{community, mod_hide_community, person},
  15   source::{community::Community, moderator::ModHideCommunity, person::Person},
  16   traits::JoinView,
  17   utils::{get_conn, limit_and_offset, DbPool},
  18 };
  19
  20 type ModHideCommunityViewTuple = (ModHideCommunity, Option<Person>, Community);
  21
  22 impl ModHideCommunityView {
  23   // Pass in mod_id as admin_id because only admins can do this action
  24   pub async fn list(pool: &mut DbPool<'_>, params: ModlogListParams) -> Result<Vec<Self>, Error> {
  25     let conn = &mut get_conn(pool).await?;
  26
  27     let admin_person_id_join = params.mod_person_id.unwrap_or(PersonId(-1));
  28     let show_mod_names = !params.hide_modlog_names;
  29     let show_mod_names_expr = show_mod_names.as_sql::<diesel::sql_types::Bool>();
  30
  31     let admin_names_join = mod_hide_community::mod_person_id
  32       .eq(person::id)
  33       .and(show_mod_names_expr.or(person::id.eq(admin_person_id_join)));
  34     let mut query = mod_hide_community::table
  35       .left_join(person::table.on(admin_names_join))
  36       .inner_join(community::table.on(mod_hide_community::community_id.eq(community::id)))
  37       .select((
  38         mod_hide_community::all_columns,
  39         person::all_columns.nullable(),
  40         community::all_columns,
  41       ))
  42       .into_boxed();
  43
  44     if let Some(community_id) = params.community_id {
  45       query = query.filter(mod_hide_community::community_id.eq(community_id));
  46     };
  47
  48     if let Some(admin_id) = params.mod_person_id {
  49       query = query.filter(mod_hide_community::mod_person_id.eq(admin_id));
  50     };
  51
  52     let (limit, offset) = limit_and_offset(params.page, params.limit)?;
  53
  54     let res = query
  55       .limit(limit)
  56       .offset(offset)
  57       .order_by(mod_hide_community::when_.desc())
  58       .load::<ModHideCommunityViewTuple>(conn)
  59       .await?;
  60
  61     let results = res.into_iter().map(Self::from_tuple).collect();
  62     Ok(results)
  63   }
  64 }
  65
  66 impl JoinView for ModHideCommunityView {
  67   type JoinTuple = ModHideCommunityViewTuple;
  68   fn from_tuple(a: Self::JoinTuple) -> Self {
  69     Self {
  70       mod_hide_community: a.0,
  71       admin: a.1,
  72       community: a.2,
  73     }
  74   }
  75 }