use diesel::{pg::Pg, result::Error, *}; use lemmy_db_queries::{ aggregates::post_aggregates::PostAggregates, functions::hot_rank, fuzzy_search, limit_and_offset, ListingType, MaybeOptional, SortType, ToSafe, ViewToVec, }; use lemmy_db_schema::{ schema::{ community, community_follower, community_user_ban, post, post_aggregates, post_like, post_read, post_saved, user_, }, source::{ community::{Community, CommunityFollower, CommunitySafe, CommunityUserBan}, post::{Post, PostRead, PostSaved}, user::{UserSafe, User_}, }, }; use log::debug; use serde::Serialize; #[derive(Debug, PartialEq, Serialize, Clone)] pub struct PostView { pub post: Post, pub creator: UserSafe, pub community: CommunitySafe, pub creator_banned_from_community: bool, // Left Join to CommunityUserBan pub counts: PostAggregates, pub subscribed: bool, // Left join to CommunityFollower pub saved: bool, // Left join to PostSaved pub read: bool, // Left join to PostRead pub my_vote: Option, // Left join to PostLike } type PostViewTuple = ( Post, UserSafe, CommunitySafe, Option, PostAggregates, Option, Option, Option, Option, ); impl PostView { pub fn read(conn: &PgConnection, post_id: i32, my_user_id: Option) -> Result { // The left join below will return None in this case let user_id_join = my_user_id.unwrap_or(-1); let ( post, creator, community, creator_banned_from_community, counts, follower, saved, read, post_like, ) = post::table .find(post_id) .inner_join(user_::table) .inner_join(community::table) .left_join( community_user_ban::table.on( post::community_id .eq(community_user_ban::community_id) .and(community_user_ban::user_id.eq(post::creator_id)), ), ) .inner_join(post_aggregates::table) .left_join( community_follower::table.on( post::community_id .eq(community_follower::community_id) .and(community_follower::user_id.eq(user_id_join)), ), ) .left_join( post_saved::table.on( post::id .eq(post_saved::post_id) .and(post_saved::user_id.eq(user_id_join)), ), ) .left_join( post_read::table.on( post::id .eq(post_read::post_id) .and(post_read::user_id.eq(user_id_join)), ), ) .left_join( post_like::table.on( post::id .eq(post_like::post_id) .and(post_like::user_id.eq(user_id_join)), ), ) .select(( post::all_columns, User_::safe_columns_tuple(), Community::safe_columns_tuple(), community_user_ban::all_columns.nullable(), post_aggregates::all_columns, community_follower::all_columns.nullable(), post_saved::all_columns.nullable(), post_read::all_columns.nullable(), post_like::score.nullable(), )) .first::(conn)?; // If a user is given, then my_vote, if None, should be 0, not null // Necessary to differentiate between other user's votes let my_vote = if my_user_id.is_some() && post_like.is_none() { Some(0) } else { post_like }; Ok(PostView { post, creator, community, creator_banned_from_community: creator_banned_from_community.is_some(), counts, subscribed: follower.is_some(), saved: saved.is_some(), read: read.is_some(), my_vote, }) } } pub struct PostQueryBuilder<'a> { conn: &'a PgConnection, listing_type: &'a ListingType, sort: &'a SortType, creator_id: Option, community_id: Option, community_name: Option, my_user_id: Option, search_term: Option, url_search: Option, show_nsfw: bool, saved_only: bool, unread_only: bool, page: Option, limit: Option, } impl<'a> PostQueryBuilder<'a> { pub fn create(conn: &'a PgConnection) -> Self { PostQueryBuilder { conn, listing_type: &ListingType::All, sort: &SortType::Hot, creator_id: None, community_id: None, community_name: None, my_user_id: None, search_term: None, url_search: None, show_nsfw: true, saved_only: false, unread_only: false, page: None, limit: None, } } pub fn listing_type(mut self, listing_type: &'a ListingType) -> Self { self.listing_type = listing_type; self } pub fn sort(mut self, sort: &'a SortType) -> Self { self.sort = sort; self } pub fn community_id>(mut self, community_id: T) -> Self { self.community_id = community_id.get_optional(); self } pub fn my_user_id>(mut self, my_user_id: T) -> Self { self.my_user_id = my_user_id.get_optional(); self } pub fn community_name>(mut self, community_name: T) -> Self { self.community_name = community_name.get_optional(); self } pub fn creator_id>(mut self, creator_id: T) -> Self { self.creator_id = creator_id.get_optional(); self } pub fn search_term>(mut self, search_term: T) -> Self { self.search_term = search_term.get_optional(); self } pub fn url_search>(mut self, url_search: T) -> Self { self.url_search = url_search.get_optional(); self } pub fn show_nsfw(mut self, show_nsfw: bool) -> Self { self.show_nsfw = show_nsfw; self } pub fn saved_only(mut self, saved_only: bool) -> Self { self.saved_only = saved_only; self } pub fn page>(mut self, page: T) -> Self { self.page = page.get_optional(); self } pub fn limit>(mut self, limit: T) -> Self { self.limit = limit.get_optional(); self } pub fn list(self) -> Result, Error> { use diesel::dsl::*; // The left join below will return None in this case let user_id_join = self.my_user_id.unwrap_or(-1); let mut query = post::table .inner_join(user_::table) .inner_join(community::table) .left_join( community_user_ban::table.on( post::community_id .eq(community_user_ban::community_id) .and(community_user_ban::user_id.eq(community::creator_id)), ), ) .inner_join(post_aggregates::table) .left_join( community_follower::table.on( post::community_id .eq(community_follower::community_id) .and(community_follower::user_id.eq(user_id_join)), ), ) .left_join( post_saved::table.on( post::id .eq(post_saved::post_id) .and(post_saved::user_id.eq(user_id_join)), ), ) .left_join( post_read::table.on( post::id .eq(post_read::post_id) .and(post_read::user_id.eq(user_id_join)), ), ) .left_join( post_like::table.on( post::id .eq(post_like::post_id) .and(post_like::user_id.eq(user_id_join)), ), ) .select(( post::all_columns, User_::safe_columns_tuple(), Community::safe_columns_tuple(), community_user_ban::all_columns.nullable(), post_aggregates::all_columns, community_follower::all_columns.nullable(), post_saved::all_columns.nullable(), post_read::all_columns.nullable(), post_like::score.nullable(), )) .into_boxed(); query = match self.listing_type { ListingType::Subscribed => query.filter(community_follower::user_id.is_not_null()), // TODO could be this: and(community_follower::user_id.eq(user_id_join)), ListingType::Local => query.filter(community::local.eq(true)), _ => query, }; if let Some(community_id) = self.community_id { query = query .filter(post::community_id.eq(community_id)) .then_order_by(post_aggregates::stickied.desc()); } if let Some(community_name) = self.community_name { query = query .filter(community::name.eq(community_name)) .filter(community::local.eq(true)) .then_order_by(post_aggregates::stickied.desc()); } if let Some(url_search) = self.url_search { query = query.filter(post::url.eq(url_search)); } if let Some(search_term) = self.search_term { let searcher = fuzzy_search(&search_term); query = query.filter( post::name .ilike(searcher.to_owned()) .or(post::body.ilike(searcher)), ); } // If its for a specific user, show the removed / deleted if let Some(creator_id) = self.creator_id { query = query.filter(post::creator_id.eq(creator_id)); } if !self.show_nsfw { query = query .filter(post::nsfw.eq(false)) .filter(community::nsfw.eq(false)); }; // TODO These two might be wrong if self.saved_only { query = query.filter(post_saved::id.is_not_null()); }; if self.unread_only { query = query.filter(post_read::id.is_not_null()); }; query = match self.sort { SortType::Active => query .then_order_by( hot_rank( post_aggregates::score, post_aggregates::newest_comment_time_necro, ) .desc(), ) .then_order_by(post_aggregates::newest_comment_time_necro.desc()), SortType::Hot => query .then_order_by(hot_rank(post_aggregates::score, post_aggregates::published).desc()) .then_order_by(post_aggregates::published.desc()), SortType::New => query.then_order_by(post_aggregates::published.desc()), SortType::MostComments => query.then_order_by(post_aggregates::comments.desc()), SortType::NewComments => query.then_order_by(post_aggregates::newest_comment_time.desc()), SortType::TopAll => query.then_order_by(post_aggregates::score.desc()), SortType::TopYear => query .filter(post::published.gt(now - 1.years())) .then_order_by(post_aggregates::score.desc()), SortType::TopMonth => query .filter(post::published.gt(now - 1.months())) .then_order_by(post_aggregates::score.desc()), SortType::TopWeek => query .filter(post::published.gt(now - 1.weeks())) .then_order_by(post_aggregates::score.desc()), SortType::TopDay => query .filter(post::published.gt(now - 1.days())) .then_order_by(post_aggregates::score.desc()), }; let (limit, offset) = limit_and_offset(self.page, self.limit); query = query .limit(limit) .offset(offset) .filter(post::removed.eq(false)) .filter(post::deleted.eq(false)) .filter(community::removed.eq(false)) .filter(community::deleted.eq(false)); debug!("Post View Query: {:?}", debug_query::(&query)); let res = query.load::(self.conn)?; Ok(PostView::from_tuple_to_vec(res)) } } impl ViewToVec for PostView { type DbTuple = PostViewTuple; fn from_tuple_to_vec(items: Vec) -> Vec { items .iter() .map(|a| Self { post: a.0.to_owned(), creator: a.1.to_owned(), community: a.2.to_owned(), creator_banned_from_community: a.3.is_some(), counts: a.4.to_owned(), subscribed: a.5.is_some(), saved: a.6.is_some(), read: a.7.is_some(), my_vote: a.8, }) .collect::>() } } #[cfg(test)] mod tests { use crate::post_view::{PostQueryBuilder, PostView}; use lemmy_db_queries::{ aggregates::post_aggregates::PostAggregates, establish_unpooled_connection, Crud, Likeable, ListingType, SortType, }; use lemmy_db_schema::source::{community::*, post::*, user::*}; #[test] fn test_crud() { let conn = establish_unpooled_connection(); let user_name = "tegan".to_string(); let community_name = "test_community_3".to_string(); let post_name = "test post 3".to_string(); let new_user = UserForm { name: user_name.to_owned(), preferred_username: None, password_encrypted: "nope".into(), email: None, matrix_user_id: None, avatar: None, banner: None, published: None, updated: None, admin: false, banned: Some(false), show_nsfw: false, theme: "browser".into(), default_sort_type: SortType::Hot as i16, default_listing_type: ListingType::Subscribed as i16, lang: "browser".into(), show_avatars: true, send_notifications_to_email: false, actor_id: None, bio: None, local: true, private_key: None, public_key: None, last_refreshed_at: None, inbox_url: None, shared_inbox_url: None, }; let inserted_user = User_::create(&conn, &new_user).unwrap(); let new_community = CommunityForm { name: community_name.to_owned(), title: "nada".to_owned(), description: None, creator_id: inserted_user.id, removed: None, deleted: None, updated: None, nsfw: false, actor_id: None, local: true, private_key: None, public_key: None, last_refreshed_at: None, published: None, icon: None, banner: None, followers_url: None, inbox_url: None, shared_inbox_url: None, }; let inserted_community = Community::create(&conn, &new_community).unwrap(); let new_post = PostForm { name: post_name.to_owned(), url: None, body: None, creator_id: inserted_user.id, community_id: inserted_community.id, removed: None, deleted: None, locked: None, stickied: None, updated: None, nsfw: false, embed_title: None, embed_description: None, embed_html: None, thumbnail_url: None, ap_id: None, local: true, published: None, }; let inserted_post = Post::create(&conn, &new_post).unwrap(); let post_like_form = PostLikeForm { post_id: inserted_post.id, user_id: inserted_user.id, score: 1, }; let inserted_post_like = PostLike::like(&conn, &post_like_form).unwrap(); let expected_post_like = PostLike { id: inserted_post_like.id, post_id: inserted_post.id, user_id: inserted_user.id, published: inserted_post_like.published, score: 1, }; let read_post_listings_with_user = PostQueryBuilder::create(&conn) .listing_type(&ListingType::Community) .sort(&SortType::New) .community_id(inserted_community.id) .my_user_id(inserted_user.id) .list() .unwrap(); let read_post_listings_no_user = PostQueryBuilder::create(&conn) .listing_type(&ListingType::Community) .sort(&SortType::New) .community_id(inserted_community.id) .list() .unwrap(); let read_post_listing_no_user = PostView::read(&conn, inserted_post.id, None).unwrap(); let read_post_listing_with_user = PostView::read(&conn, inserted_post.id, Some(inserted_user.id)).unwrap(); let agg = PostAggregates::read(&conn, inserted_post.id).unwrap(); // the non user version let expected_post_listing_no_user = PostView { post: Post { id: inserted_post.id, name: post_name, creator_id: inserted_user.id, url: None, body: None, published: inserted_post.published, updated: None, community_id: inserted_community.id, removed: false, deleted: false, locked: false, stickied: false, nsfw: false, embed_title: None, embed_description: None, embed_html: None, thumbnail_url: None, ap_id: inserted_post.ap_id.to_owned(), local: true, }, my_vote: None, creator: UserSafe { id: inserted_user.id, name: user_name, preferred_username: None, published: inserted_user.published, avatar: None, actor_id: inserted_user.actor_id.to_owned(), local: true, banned: false, deleted: false, bio: None, banner: None, admin: false, updated: None, matrix_user_id: None, inbox_url: inserted_user.inbox_url.to_owned(), shared_inbox_url: None, }, creator_banned_from_community: false, community: CommunitySafe { id: inserted_community.id, name: community_name, icon: None, removed: false, deleted: false, nsfw: false, actor_id: inserted_community.actor_id.to_owned(), local: true, title: "nada".to_owned(), description: None, creator_id: inserted_user.id, updated: None, banner: None, published: inserted_community.published, }, counts: PostAggregates { id: agg.id, post_id: inserted_post.id, comments: 0, score: 1, upvotes: 1, downvotes: 0, stickied: false, published: agg.published, newest_comment_time_necro: inserted_post.published, newest_comment_time: inserted_post.published, }, subscribed: false, read: false, saved: false, }; // TODO More needs to be added here let mut expected_post_listing_with_user = expected_post_listing_no_user.to_owned(); expected_post_listing_with_user.my_vote = Some(1); let like_removed = PostLike::remove(&conn, inserted_user.id, inserted_post.id).unwrap(); let num_deleted = Post::delete(&conn, inserted_post.id).unwrap(); Community::delete(&conn, inserted_community.id).unwrap(); User_::delete(&conn, inserted_user.id).unwrap(); // The with user assert_eq!( expected_post_listing_with_user, read_post_listings_with_user[0] ); assert_eq!(expected_post_listing_with_user, read_post_listing_with_user); assert_eq!(1, read_post_listings_with_user.len()); // Without the user assert_eq!(expected_post_listing_no_user, read_post_listings_no_user[0]); assert_eq!(expected_post_listing_no_user, read_post_listing_no_user); assert_eq!(1, read_post_listings_no_user.len()); // assert_eq!(expected_post, inserted_post); // assert_eq!(expected_post, updated_post); assert_eq!(expected_post_like, inserted_post_like); assert_eq!(1, like_removed); assert_eq!(1, num_deleted); } }