use crate::structs::{CommunityModeratorView, CommunityView, PersonView}; use diesel::{ result::Error, BoolExpressionMethods, ExpressionMethods, JoinOnDsl, NullableExpressionMethods, PgTextExpressionMethods, QueryDsl, }; use diesel_async::RunQueryDsl; use lemmy_db_schema::{ aggregates::structs::CommunityAggregates, newtypes::{CommunityId, PersonId}, schema::{community, community_aggregates, community_block, community_follower, local_user}, source::{ community::{Community, CommunityFollower}, community_block::CommunityBlock, local_user::LocalUser, }, traits::JoinView, utils::{fuzzy_search, get_conn, limit_and_offset, DbPool}, ListingType, SortType, }; use typed_builder::TypedBuilder; type CommunityViewTuple = ( Community, CommunityAggregates, Option, Option, ); impl CommunityView { pub async fn read( pool: &DbPool, community_id: CommunityId, my_person_id: Option, is_mod_or_admin: Option, ) -> Result { let conn = &mut get_conn(pool).await?; // The left join below will return None in this case let person_id_join = my_person_id.unwrap_or(PersonId(-1)); let mut query = community::table .find(community_id) .inner_join(community_aggregates::table) .left_join( community_follower::table.on( community::id .eq(community_follower::community_id) .and(community_follower::person_id.eq(person_id_join)), ), ) .left_join( community_block::table.on( community::id .eq(community_block::community_id) .and(community_block::person_id.eq(person_id_join)), ), ) .select(( community::all_columns, community_aggregates::all_columns, community_follower::all_columns.nullable(), community_block::all_columns.nullable(), )) .into_boxed(); // Hide deleted and removed for non-admins or mods if !is_mod_or_admin.unwrap_or(true) { query = query .filter(community::removed.eq(false)) .filter(community::deleted.eq(false)); } let (community, counts, follower, blocked) = query.first::(conn).await?; Ok(CommunityView { community, subscribed: CommunityFollower::to_subscribed_type(&follower), blocked: blocked.is_some(), counts, }) } pub async fn is_mod_or_admin( pool: &DbPool, person_id: PersonId, community_id: CommunityId, ) -> Result { let is_mod = CommunityModeratorView::for_community(pool, community_id) .await .map(|v| { v.into_iter() .map(|m| m.moderator.id) .collect::>() }) .unwrap_or_default() .contains(&person_id); if is_mod { return Ok(true); } let is_admin = PersonView::admins(pool) .await .map(|v| { v.into_iter() .map(|a| a.person.id) .collect::>() }) .unwrap_or_default() .contains(&person_id); Ok(is_admin) } } #[derive(TypedBuilder)] #[builder(field_defaults(default))] pub struct CommunityQuery<'a> { #[builder(!default)] pool: &'a DbPool, listing_type: Option, sort: Option, local_user: Option<&'a LocalUser>, search_term: Option, is_mod_or_admin: Option, page: Option, limit: Option, } impl<'a> CommunityQuery<'a> { pub async fn list(self) -> Result, Error> { let conn = &mut get_conn(self.pool).await?; // The left join below will return None in this case let person_id_join = self.local_user.map(|l| l.person_id).unwrap_or(PersonId(-1)); let mut query = community::table .inner_join(community_aggregates::table) .left_join(local_user::table.on(local_user::person_id.eq(person_id_join))) .left_join( community_follower::table.on( community::id .eq(community_follower::community_id) .and(community_follower::person_id.eq(person_id_join)), ), ) .left_join( community_block::table.on( community::id .eq(community_block::community_id) .and(community_block::person_id.eq(person_id_join)), ), ) .select(( community::all_columns, community_aggregates::all_columns, community_follower::all_columns.nullable(), community_block::all_columns.nullable(), )) .into_boxed(); if let Some(search_term) = self.search_term { let searcher = fuzzy_search(&search_term); query = query .filter(community::name.ilike(searcher.clone())) .or_filter(community::title.ilike(searcher)); }; // Hide deleted and removed for non-admins or mods if !self.is_mod_or_admin.unwrap_or(true) { query = query .filter(community::removed.eq(false)) .filter(community::deleted.eq(false)); } match self.sort.unwrap_or(SortType::Hot) { SortType::New => query = query.order_by(community::published.desc()), SortType::TopAll => query = query.order_by(community_aggregates::subscribers.desc()), SortType::TopMonth => query = query.order_by(community_aggregates::users_active_month.desc()), SortType::Hot => { query = query.order_by(community_aggregates::users_active_month.desc()); // Don't show hidden communities in Hot (trending) query = query.filter( community::hidden .eq(false) .or(community_follower::person_id.eq(person_id_join)), ); } // Covers all other sorts _ => query = query.order_by(community_aggregates::users_active_month.desc()), }; if let Some(listing_type) = self.listing_type { query = match listing_type { ListingType::Subscribed => query.filter(community_follower::person_id.is_not_null()), // TODO could be this: and(community_follower::person_id.eq(person_id_join)), ListingType::Local => query.filter(community::local.eq(true)), _ => query, }; } // Don't show blocked communities or nsfw communities if not enabled in profile if self.local_user.is_some() { query = query.filter(community_block::person_id.is_null()); query = query.filter(community::nsfw.eq(false).or(local_user::show_nsfw.eq(true))); } else { // No person in request, only show nsfw communities if show_nsfw passed into request if !self.local_user.map(|l| l.show_nsfw).unwrap_or(false) { query = query.filter(community::nsfw.eq(false)); } } let (limit, offset) = limit_and_offset(self.page, self.limit)?; let res = query .limit(limit) .offset(offset) .filter(community::removed.eq(false)) .filter(community::deleted.eq(false)) .load::(conn) .await?; Ok(res.into_iter().map(CommunityView::from_tuple).collect()) } } impl JoinView for CommunityView { type JoinTuple = CommunityViewTuple; fn from_tuple(a: Self::JoinTuple) -> Self { Self { community: a.0, counts: a.1, subscribed: CommunityFollower::to_subscribed_type(&a.2), blocked: a.3.is_some(), } } }