1 use crate::{community_moderator_view::CommunityModeratorView, person_view::PersonViewSafe};
2 use diesel::{result::Error, *};
3 use lemmy_db_queries::{
4 aggregates::community_aggregates::CommunityAggregates,
14 use lemmy_db_schema::{
15 schema::{community, community_aggregates, community_block, community_follower},
17 community::{Community, CommunityFollower, CommunitySafe},
18 community_block::CommunityBlock,
25 #[derive(Debug, Serialize, Clone)]
26 pub struct CommunityView {
27 pub community: CommunitySafe,
30 pub counts: CommunityAggregates,
33 type CommunityViewTuple = (
36 Option<CommunityFollower>,
37 Option<CommunityBlock>,
43 community_id: CommunityId,
44 my_person_id: Option<PersonId>,
45 ) -> Result<Self, Error> {
46 // The left join below will return None in this case
47 let person_id_join = my_person_id.unwrap_or(PersonId(-1));
49 let (community, counts, follower, blocked) = community::table
51 .inner_join(community_aggregates::table)
53 community_follower::table.on(
55 .eq(community_follower::community_id)
56 .and(community_follower::person_id.eq(person_id_join)),
60 community_block::table.on(
62 .eq(community_block::community_id)
63 .and(community_block::person_id.eq(person_id_join)),
67 Community::safe_columns_tuple(),
68 community_aggregates::all_columns,
69 community_follower::all_columns.nullable(),
70 community_block::all_columns.nullable(),
72 .first::<CommunityViewTuple>(conn)?;
76 subscribed: follower.is_some(),
77 blocked: blocked.is_some(),
82 // TODO: this function is only used by is_mod_or_admin() below, can probably be merged
83 fn community_mods_and_admins(
85 community_id: CommunityId,
86 ) -> Result<Vec<PersonId>, Error> {
87 let mut mods_and_admins: Vec<PersonId> = Vec::new();
88 mods_and_admins.append(
89 &mut CommunityModeratorView::for_community(conn, community_id)
90 .map(|v| v.into_iter().map(|m| m.moderator.id).collect())?,
92 mods_and_admins.append(
93 &mut PersonViewSafe::admins(conn).map(|v| v.into_iter().map(|a| a.person.id).collect())?,
98 pub fn is_mod_or_admin(
101 community_id: CommunityId,
103 Self::community_mods_and_admins(conn, community_id)
105 .contains(&person_id)
109 pub struct CommunityQueryBuilder<'a> {
110 conn: &'a PgConnection,
111 listing_type: Option<ListingType>,
112 sort: Option<SortType>,
113 my_person_id: Option<PersonId>,
114 show_nsfw: Option<bool>,
115 search_term: Option<String>,
120 impl<'a> CommunityQueryBuilder<'a> {
121 pub fn create(conn: &'a PgConnection) -> Self {
122 CommunityQueryBuilder {
134 pub fn listing_type<T: MaybeOptional<ListingType>>(mut self, listing_type: T) -> Self {
135 self.listing_type = listing_type.get_optional();
139 pub fn sort<T: MaybeOptional<SortType>>(mut self, sort: T) -> Self {
140 self.sort = sort.get_optional();
144 pub fn show_nsfw<T: MaybeOptional<bool>>(mut self, show_nsfw: T) -> Self {
145 self.show_nsfw = show_nsfw.get_optional();
149 pub fn search_term<T: MaybeOptional<String>>(mut self, search_term: T) -> Self {
150 self.search_term = search_term.get_optional();
154 pub fn my_person_id<T: MaybeOptional<PersonId>>(mut self, my_person_id: T) -> Self {
155 self.my_person_id = my_person_id.get_optional();
159 pub fn page<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
160 self.page = page.get_optional();
164 pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
165 self.limit = limit.get_optional();
169 pub fn list(self) -> Result<Vec<CommunityView>, Error> {
170 // The left join below will return None in this case
171 let person_id_join = self.my_person_id.unwrap_or(PersonId(-1));
173 let mut query = community::table
174 .inner_join(community_aggregates::table)
176 community_follower::table.on(
178 .eq(community_follower::community_id)
179 .and(community_follower::person_id.eq(person_id_join)),
183 community_block::table.on(
185 .eq(community_block::community_id)
186 .and(community_block::person_id.eq(person_id_join)),
190 Community::safe_columns_tuple(),
191 community_aggregates::all_columns,
192 community_follower::all_columns.nullable(),
193 community_block::all_columns.nullable(),
197 if let Some(search_term) = self.search_term {
198 let searcher = fuzzy_search(&search_term);
200 .filter(community::name.ilike(searcher.to_owned()))
201 .or_filter(community::title.ilike(searcher.to_owned()))
202 .or_filter(community::description.ilike(searcher));
205 match self.sort.unwrap_or(SortType::Hot) {
206 SortType::New => query = query.order_by(community::published.desc()),
207 SortType::TopAll => query = query.order_by(community_aggregates::subscribers.desc()),
208 SortType::TopMonth => query = query.order_by(community_aggregates::users_active_month.desc()),
209 // Covers all other sorts, including hot
214 community_aggregates::subscribers,
215 community_aggregates::published,
219 .then_order_by(community_aggregates::published.desc())
223 if !self.show_nsfw.unwrap_or(false) {
224 query = query.filter(community::nsfw.eq(false));
227 if let Some(listing_type) = self.listing_type {
228 query = match listing_type {
229 ListingType::Subscribed => query.filter(community_follower::person_id.is_not_null()), // TODO could be this: and(community_follower::person_id.eq(person_id_join)),
230 ListingType::Local => query.filter(community::local.eq(true)),
235 // Don't show blocked communities
236 if self.my_person_id.is_some() {
237 query = query.filter(community_block::person_id.is_null());
240 let (limit, offset) = limit_and_offset(self.page, self.limit);
244 .filter(community::removed.eq(false))
245 .filter(community::deleted.eq(false))
246 .load::<CommunityViewTuple>(self.conn)?;
248 Ok(CommunityView::from_tuple_to_vec(res))
252 impl ViewToVec for CommunityView {
253 type DbTuple = CommunityViewTuple;
254 fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
258 community: a.0.to_owned(),
259 counts: a.1.to_owned(),
260 subscribed: a.2.is_some(),
261 blocked: a.3.is_some(),
263 .collect::<Vec<Self>>()