crates/db_views_moderator/src/mod_add_community_view.rs

   1 use crate::structs::{ModAddCommunityView, 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_add_community, person},
  15   source::{community::Community, moderator::ModAddCommunity, person::Person},
  16   traits::JoinView,
  17   utils::{get_conn, limit_and_offset, DbPool},
  18 };
  19
  20 type ModAddCommunityViewTuple = (ModAddCommunity, Option<Person>, Community, Person);
  21
  22 impl ModAddCommunityView {
  23   pub async fn list(pool: &mut DbPool<'_>, params: ModlogListParams) -> Result<Vec<Self>, Error> {
  24     let conn = &mut get_conn(pool).await?;
  25     let person_alias_1 = diesel::alias!(person as person1);
  26     let admin_person_id_join = params.mod_person_id.unwrap_or(PersonId(-1));
  27     let show_mod_names = !params.hide_modlog_names;
  28     let show_mod_names_expr = show_mod_names.as_sql::<diesel::sql_types::Bool>();
  29
  30     let admin_names_join = mod_add_community::mod_person_id
  31       .eq(person::id)
  32       .and(show_mod_names_expr.or(person::id.eq(admin_person_id_join)));
  33     let mut query = mod_add_community::table
  34       .left_join(person::table.on(admin_names_join))
  35       .inner_join(community::table)
  36       .inner_join(
  37         person_alias_1.on(mod_add_community::other_person_id.eq(person_alias_1.field(person::id))),
  38       )
  39       .select((
  40         mod_add_community::all_columns,
  41         person::all_columns.nullable(),
  42         community::all_columns,
  43         person_alias_1.fields(person::all_columns),
  44       ))
  45       .into_boxed();
  46
  47     if let Some(mod_person_id) = params.mod_person_id {
  48       query = query.filter(mod_add_community::mod_person_id.eq(mod_person_id));
  49     };
  50
  51     if let Some(community_id) = params.community_id {
  52       query = query.filter(mod_add_community::community_id.eq(community_id));
  53     };
  54
  55     if let Some(other_person_id) = params.other_person_id {
  56       query = query.filter(person_alias_1.field(person::id).eq(other_person_id));
  57     };
  58
  59     let (limit, offset) = limit_and_offset(params.page, params.limit)?;
  60
  61     let res = query
  62       .limit(limit)
  63       .offset(offset)
  64       .order_by(mod_add_community::when_.desc())
  65       .load::<ModAddCommunityViewTuple>(conn)
  66       .await?;
  67
  68     let results = res.into_iter().map(Self::from_tuple).collect();
  69     Ok(results)
  70   }
  71 }
  72
  73 impl JoinView for ModAddCommunityView {
  74   type JoinTuple = ModAddCommunityViewTuple;
  75   fn from_tuple(a: Self::JoinTuple) -> Self {
  76     Self {
  77       mod_add_community: a.0,
  78       moderator: a.1,
  79       community: a.2,
  80       modded_person: a.3,
  81     }
  82   }
  83 }