crates/db_views_moderator/src/mod_feature_post_view.rs

   1 use crate::structs::{ModFeaturePostView, 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_feature_post, person, post},
  15   source::{community::Community, moderator::ModFeaturePost, person::Person, post::Post},
  16   traits::JoinView,
  17   utils::{get_conn, limit_and_offset, DbPool},
  18 };
  19
  20 type ModFeaturePostViewTuple = (ModFeaturePost, Option<Person>, Post, Community);
  21
  22 impl ModFeaturePostView {
  23   pub async fn list(pool: &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_feature_post::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_feature_post::table
  34       .left_join(person::table.on(admin_names_join))
  35       .inner_join(post::table)
  36       .inner_join(person_alias_1.on(post::creator_id.eq(person_alias_1.field(person::id))))
  37       .inner_join(community::table.on(post::community_id.eq(community::id)))
  38       .select((
  39         mod_feature_post::all_columns,
  40         person::all_columns.nullable(),
  41         post::all_columns,
  42         community::all_columns,
  43       ))
  44       .into_boxed();
  45
  46     if let Some(community_id) = params.community_id {
  47       query = query.filter(post::community_id.eq(community_id));
  48     };
  49
  50     if let Some(mod_person_id) = params.mod_person_id {
  51       query = query.filter(mod_feature_post::mod_person_id.eq(mod_person_id));
  52     };
  53
  54     if let Some(other_person_id) = params.other_person_id {
  55       query = query.filter(person_alias_1.field(person::id).eq(other_person_id));
  56     };
  57
  58     let (limit, offset) = limit_and_offset(params.page, params.limit)?;
  59
  60     let res = query
  61       .limit(limit)
  62       .offset(offset)
  63       .order_by(mod_feature_post::when_.desc())
  64       .load::<ModFeaturePostViewTuple>(conn)
  65       .await?;
  66
  67     let results = res.into_iter().map(Self::from_tuple).collect();
  68     Ok(results)
  69   }
  70 }
  71
  72 impl JoinView for ModFeaturePostView {
  73   type JoinTuple = ModFeaturePostViewTuple;
  74   fn from_tuple(a: Self::JoinTuple) -> Self {
  75     Self {
  76       mod_feature_post: a.0,
  77       moderator: a.1,
  78       post: a.2,
  79       community: a.3,
  80     }
  81   }
  82 }