use crate::structs::PersonMentionView; use diesel::{ dsl::now, pg::Pg, result::Error, BoolExpressionMethods, ExpressionMethods, JoinOnDsl, NullableExpressionMethods, QueryDsl, }; use diesel_async::RunQueryDsl; use lemmy_db_schema::{ aliases, newtypes::{PersonId, PersonMentionId}, schema::{ comment, comment_aggregates, comment_like, comment_saved, community, community_follower, community_person_ban, person, person_block, person_mention, post, }, source::community::CommunityFollower, utils::{get_conn, limit_and_offset, DbConn, DbPool, ListFn, Queries, ReadFn}, CommentSortType, }; fn queries<'a>() -> Queries< impl ReadFn<'a, PersonMentionView, (PersonMentionId, Option)>, impl ListFn<'a, PersonMentionView, PersonMentionQuery>, > { let all_joins = |query: person_mention::BoxedQuery<'a, Pg>, my_person_id: Option| { // The left join below will return None in this case let person_id_join = my_person_id.unwrap_or(PersonId(-1)); query .inner_join(comment::table) .inner_join(person::table.on(comment::creator_id.eq(person::id))) .inner_join(post::table.on(comment::post_id.eq(post::id))) .inner_join(community::table.on(post::community_id.eq(community::id))) .inner_join(aliases::person1) .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id))) .left_join( community_follower::table.on( post::community_id .eq(community_follower::community_id) .and(community_follower::person_id.eq(person_id_join)), ), ) .left_join( comment_saved::table.on( comment::id .eq(comment_saved::comment_id) .and(comment_saved::person_id.eq(person_id_join)), ), ) .left_join( person_block::table.on( comment::creator_id .eq(person_block::target_id) .and(person_block::person_id.eq(person_id_join)), ), ) .left_join( comment_like::table.on( comment::id .eq(comment_like::comment_id) .and(comment_like::person_id.eq(person_id_join)), ), ) }; let selection = ( person_mention::all_columns, comment::all_columns, person::all_columns, post::all_columns, community::all_columns, aliases::person1.fields(person::all_columns), comment_aggregates::all_columns, community_person_ban::id.nullable().is_not_null(), CommunityFollower::select_subscribed_type(), comment_saved::id.nullable().is_not_null(), person_block::id.nullable().is_not_null(), comment_like::score.nullable(), ); let read = move |mut conn: DbConn<'a>, (person_mention_id, my_person_id): (PersonMentionId, Option)| async move { all_joins( person_mention::table.find(person_mention_id).into_boxed(), my_person_id, ) .left_join( community_person_ban::table.on( community::id .eq(community_person_ban::community_id) .and(community_person_ban::person_id.eq(comment::creator_id)), ), ) .select(selection) .first::(&mut conn) .await }; let list = move |mut conn: DbConn<'a>, options: PersonMentionQuery| async move { let mut query = all_joins(person_mention::table.into_boxed(), options.my_person_id) .left_join( community_person_ban::table.on( community::id .eq(community_person_ban::community_id) .and(community_person_ban::person_id.eq(comment::creator_id)) .and( community_person_ban::expires .is_null() .or(community_person_ban::expires.gt(now)), ), ), ) .select(selection); if let Some(recipient_id) = options.recipient_id { query = query.filter(person_mention::recipient_id.eq(recipient_id)); } if options.unread_only { query = query.filter(person_mention::read.eq(false)); } if !options.show_bot_accounts { query = query.filter(person::bot_account.eq(false)); }; query = match options.sort.unwrap_or(CommentSortType::Hot) { CommentSortType::Hot => query.then_order_by(comment_aggregates::hot_rank.desc()), CommentSortType::Controversial => { query.then_order_by(comment_aggregates::controversy_rank.desc()) } CommentSortType::New => query.then_order_by(comment::published.desc()), CommentSortType::Old => query.then_order_by(comment::published.asc()), CommentSortType::Top => query.order_by(comment_aggregates::score.desc()), }; let (limit, offset) = limit_and_offset(options.page, options.limit)?; query .limit(limit) .offset(offset) .load::(&mut conn) .await }; Queries::new(read, list) } impl PersonMentionView { pub async fn read( pool: &mut DbPool<'_>, person_mention_id: PersonMentionId, my_person_id: Option, ) -> Result { queries() .read(pool, (person_mention_id, my_person_id)) .await } /// Gets the number of unread mentions pub async fn get_unread_mentions( pool: &mut DbPool<'_>, my_person_id: PersonId, ) -> Result { use diesel::dsl::count; let conn = &mut get_conn(pool).await?; person_mention::table .inner_join(comment::table) .filter(person_mention::recipient_id.eq(my_person_id)) .filter(person_mention::read.eq(false)) .filter(comment::deleted.eq(false)) .filter(comment::removed.eq(false)) .select(count(person_mention::id)) .first::(conn) .await } } #[derive(Default)] pub struct PersonMentionQuery { pub my_person_id: Option, pub recipient_id: Option, pub sort: Option, pub unread_only: bool, pub show_bot_accounts: bool, pub page: Option, pub limit: Option, } impl PersonMentionQuery { pub async fn list(self, pool: &mut DbPool<'_>) -> Result, Error> { queries().list(pool, self).await } }