crates/db_views_moderator/src/admin_purge_comment_view.rs

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