use crate::structs::CommentView; use diesel::{dsl::*, result::Error, *}; use diesel_ltree::{nlevel, subpath, Ltree, LtreeExtensions}; use lemmy_db_schema::{ aggregates::structs::CommentAggregates, newtypes::{CommentId, CommunityId, DbUrl, PersonId, PostId}, schema::{ comment, comment_aggregates, comment_like, comment_saved, community, community_block, community_follower, community_person_ban, person, person_block, post, }, source::{ comment::{Comment, CommentSaved}, community::{Community, CommunityFollower, CommunityPersonBan, CommunitySafe}, person::{Person, PersonSafe}, person_block::PersonBlock, post::Post, }, traits::{ToSafe, ViewToVec}, utils::{functions::hot_rank, fuzzy_search, limit_and_offset_unlimited}, CommentSortType, ListingType, }; use typed_builder::TypedBuilder; type CommentViewTuple = ( Comment, PersonSafe, Post, CommunitySafe, CommentAggregates, Option, Option, Option, Option, Option, ); impl CommentView { pub fn read( conn: &PgConnection, comment_id: CommentId, my_person_id: Option, ) -> Result { // The left join below will return None in this case let person_id_join = my_person_id.unwrap_or(PersonId(-1)); let ( comment, creator, post, community, counts, creator_banned_from_community, follower, saved, creator_blocked, comment_like, ) = comment::table .find(comment_id) .inner_join(person::table) .inner_join(post::table) .inner_join(community::table.on(post::community_id.eq(community::id))) .inner_join(comment_aggregates::table) .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)), ), ), ) .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)), ), ) .select(( comment::all_columns, Person::safe_columns_tuple(), post::all_columns, Community::safe_columns_tuple(), comment_aggregates::all_columns, community_person_ban::all_columns.nullable(), community_follower::all_columns.nullable(), comment_saved::all_columns.nullable(), person_block::all_columns.nullable(), comment_like::score.nullable(), )) .first::(conn)?; // If a person is given, then my_vote, if None, should be 0, not null // Necessary to differentiate between other person's votes let my_vote = if my_person_id.is_some() && comment_like.is_none() { Some(0) } else { comment_like }; Ok(CommentView { comment, post, creator, community, counts, creator_banned_from_community: creator_banned_from_community.is_some(), subscribed: CommunityFollower::to_subscribed_type(&follower), saved: saved.is_some(), creator_blocked: creator_blocked.is_some(), my_vote, }) } } #[derive(TypedBuilder)] #[builder(field_defaults(default))] pub struct CommentQuery<'a> { #[builder(!default)] conn: &'a PgConnection, listing_type: Option, sort: Option, community_id: Option, community_actor_id: Option, post_id: Option, parent_path: Option, creator_id: Option, my_person_id: Option, search_term: Option, saved_only: Option, show_bot_accounts: Option, page: Option, limit: Option, max_depth: Option, } impl<'a> CommentQuery<'a> { pub fn list(self) -> Result, Error> { use diesel::dsl::*; // The left join below will return None in this case let person_id_join = self.my_person_id.unwrap_or(PersonId(-1)); let mut query = comment::table .inner_join(person::table) .inner_join(post::table) .inner_join(community::table.on(post::community_id.eq(community::id))) .inner_join(comment_aggregates::table) .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)), ), ), ) .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( community_block::table.on( community::id .eq(community_block::community_id) .and(community_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)), ), ) .select(( comment::all_columns, Person::safe_columns_tuple(), post::all_columns, Community::safe_columns_tuple(), comment_aggregates::all_columns, community_person_ban::all_columns.nullable(), community_follower::all_columns.nullable(), comment_saved::all_columns.nullable(), person_block::all_columns.nullable(), comment_like::score.nullable(), )) .into_boxed(); if let Some(creator_id) = self.creator_id { query = query.filter(comment::creator_id.eq(creator_id)); }; if let Some(post_id) = self.post_id { query = query.filter(comment::post_id.eq(post_id)); }; if let Some(parent_path) = self.parent_path.as_ref() { query = query.filter(comment::path.contained_by(parent_path)); }; if let Some(search_term) = self.search_term { query = query.filter(comment::content.ilike(fuzzy_search(&search_term))); }; if let Some(listing_type) = self.listing_type { match listing_type { ListingType::Subscribed => { query = 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 = query.filter(community::local.eq(true)).filter( community::hidden .eq(false) .or(community_follower::person_id.eq(person_id_join)), ) } ListingType::All => { query = query.filter( community::hidden .eq(false) .or(community_follower::person_id.eq(person_id_join)), ) } } }; if let Some(community_id) = self.community_id { query = query.filter(post::community_id.eq(community_id)); } if let Some(community_actor_id) = self.community_actor_id { query = query.filter(community::actor_id.eq(community_actor_id)) } if self.saved_only.unwrap_or(false) { query = query.filter(comment_saved::id.is_not_null()); } if !self.show_bot_accounts.unwrap_or(true) { query = query.filter(person::bot_account.eq(false)); }; // Don't show blocked communities or persons if self.my_person_id.is_some() { query = query.filter(community_block::person_id.is_null()); query = query.filter(person_block::person_id.is_null()); } // A Max depth given means its a tree fetch let (limit, offset) = if let Some(max_depth) = self.max_depth { let depth_limit = if let Some(parent_path) = self.parent_path.as_ref() { parent_path.0.split('.').count() as i32 + max_depth // Add one because of root "0" } else { max_depth + 1 }; query = query.filter(nlevel(comment::path).le(depth_limit)); // Always order by the parent path first query = query.order_by(subpath(comment::path, 0, -1)); // TODO limit question. Limiting does not work for comment threads ATM, only max_depth // For now, don't do any limiting for tree fetches // https://stackoverflow.com/questions/72983614/postgres-ltree-how-to-limit-the-max-number-of-children-at-any-given-level // Don't use the regular error-checking one, many more comments must ofter be fetched. // This does not work for comment trees, and the limit should be manually set to a high number // // If a max depth is given, then you know its a tree fetch, and limits should be ignored (i64::MAX, 0) } else { limit_and_offset_unlimited(self.page, self.limit) }; query = match self.sort.unwrap_or(CommentSortType::Hot) { CommentSortType::Hot => query .then_order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc()) .then_order_by(comment_aggregates::published.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()), }; // Note: deleted and removed comments are done on the front side let res = query .limit(limit) .offset(offset) .load::(self.conn)?; Ok(CommentView::from_tuple_to_vec(res)) } } impl ViewToVec for CommentView { type DbTuple = CommentViewTuple; fn from_tuple_to_vec(items: Vec) -> Vec { items .into_iter() .map(|a| Self { comment: a.0, creator: a.1, post: a.2, community: a.3, counts: a.4, creator_banned_from_community: a.5.is_some(), subscribed: CommunityFollower::to_subscribed_type(&a.6), saved: a.7.is_some(), creator_blocked: a.8.is_some(), my_vote: a.9, }) .collect::>() } } #[cfg(test)] mod tests { use crate::comment_view::*; use lemmy_db_schema::{ aggregates::structs::CommentAggregates, source::{comment::*, community::*, person::*, person_block::PersonBlockForm, post::*}, traits::{Blockable, Crud, Likeable}, utils::establish_unpooled_connection, SubscribedType, }; use serial_test::serial; #[test] #[serial] fn test_crud() { let conn = establish_unpooled_connection(); let new_person = PersonForm { name: "timmy".into(), public_key: Some("pubkey".to_string()), ..PersonForm::default() }; let inserted_person = Person::create(&conn, &new_person).unwrap(); let new_person_2 = PersonForm { name: "sara".into(), public_key: Some("pubkey".to_string()), ..PersonForm::default() }; let inserted_person_2 = Person::create(&conn, &new_person_2).unwrap(); let new_community = CommunityForm { name: "test community 5".to_string(), title: "nada".to_owned(), public_key: Some("pubkey".to_string()), ..CommunityForm::default() }; let inserted_community = Community::create(&conn, &new_community).unwrap(); let new_post = PostForm { name: "A test post 2".into(), creator_id: inserted_person.id, community_id: inserted_community.id, ..PostForm::default() }; let inserted_post = Post::create(&conn, &new_post).unwrap(); // Create a comment tree with this hierarchy // 0 // \ \ // 1 2 // \ // 3 4 // \ // 5 let comment_form_0 = CommentForm { content: "Comment 0".into(), creator_id: inserted_person.id, post_id: inserted_post.id, ..CommentForm::default() }; let inserted_comment_0 = Comment::create(&conn, &comment_form_0, None).unwrap(); let comment_form_1 = CommentForm { content: "Comment 1, A test blocked comment".into(), creator_id: inserted_person_2.id, post_id: inserted_post.id, ..CommentForm::default() }; let inserted_comment_1 = Comment::create(&conn, &comment_form_1, Some(&inserted_comment_0.path)).unwrap(); let comment_form_2 = CommentForm { content: "Comment 2".into(), creator_id: inserted_person.id, post_id: inserted_post.id, ..CommentForm::default() }; let inserted_comment_2 = Comment::create(&conn, &comment_form_2, Some(&inserted_comment_0.path)).unwrap(); let comment_form_3 = CommentForm { content: "Comment 3".into(), creator_id: inserted_person.id, post_id: inserted_post.id, ..CommentForm::default() }; let _inserted_comment_3 = Comment::create(&conn, &comment_form_3, Some(&inserted_comment_1.path)).unwrap(); let comment_form_4 = CommentForm { content: "Comment 4".into(), creator_id: inserted_person.id, post_id: inserted_post.id, ..CommentForm::default() }; let inserted_comment_4 = Comment::create(&conn, &comment_form_4, Some(&inserted_comment_1.path)).unwrap(); let comment_form_5 = CommentForm { content: "Comment 5".into(), creator_id: inserted_person.id, post_id: inserted_post.id, ..CommentForm::default() }; let _inserted_comment_5 = Comment::create(&conn, &comment_form_5, Some(&inserted_comment_4.path)).unwrap(); let timmy_blocks_sara_form = PersonBlockForm { person_id: inserted_person.id, target_id: inserted_person_2.id, }; let inserted_block = PersonBlock::block(&conn, &timmy_blocks_sara_form).unwrap(); let expected_block = PersonBlock { id: inserted_block.id, person_id: inserted_person.id, target_id: inserted_person_2.id, published: inserted_block.published, }; assert_eq!(expected_block, inserted_block); let comment_like_form = CommentLikeForm { comment_id: inserted_comment_0.id, post_id: inserted_post.id, person_id: inserted_person.id, score: 1, }; let _inserted_comment_like = CommentLike::like(&conn, &comment_like_form).unwrap(); let agg = CommentAggregates::read(&conn, inserted_comment_0.id).unwrap(); let top_path = inserted_comment_0.to_owned().path; let expected_comment_view_no_person = CommentView { creator_banned_from_community: false, my_vote: None, subscribed: SubscribedType::NotSubscribed, saved: false, creator_blocked: false, comment: Comment { id: inserted_comment_0.id, content: "Comment 0".into(), creator_id: inserted_person.id, post_id: inserted_post.id, removed: false, deleted: false, published: inserted_comment_0.published, ap_id: inserted_comment_0.ap_id, updated: None, local: true, distinguished: false, path: top_path, }, creator: PersonSafe { id: inserted_person.id, name: "timmy".into(), display_name: None, published: inserted_person.published, avatar: None, actor_id: inserted_person.actor_id.to_owned(), local: true, banned: false, deleted: false, admin: false, bot_account: false, bio: None, banner: None, updated: None, inbox_url: inserted_person.inbox_url.to_owned(), shared_inbox_url: None, matrix_user_id: None, ban_expires: None, }, post: Post { id: inserted_post.id, name: inserted_post.name.to_owned(), creator_id: inserted_person.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_video_url: None, thumbnail_url: None, ap_id: inserted_post.ap_id.to_owned(), local: true, }, community: CommunitySafe { id: inserted_community.id, name: "test community 5".to_string(), icon: None, removed: false, deleted: false, nsfw: false, actor_id: inserted_community.actor_id.to_owned(), local: true, title: "nada".to_owned(), description: None, updated: None, banner: None, hidden: false, posting_restricted_to_mods: false, published: inserted_community.published, }, counts: CommentAggregates { id: agg.id, comment_id: inserted_comment_0.id, score: 1, upvotes: 1, downvotes: 0, published: agg.published, child_count: 5, }, }; let mut expected_comment_view_with_person = expected_comment_view_no_person.to_owned(); expected_comment_view_with_person.my_vote = Some(1); let read_comment_views_no_person = CommentQuery::builder() .conn(&conn) .post_id(Some(inserted_post.id)) .build() .list() .unwrap(); assert_eq!( expected_comment_view_no_person, read_comment_views_no_person[0] ); let read_comment_views_with_person = CommentQuery::builder() .conn(&conn) .post_id(Some(inserted_post.id)) .my_person_id(Some(inserted_person.id)) .build() .list() .unwrap(); assert_eq!( expected_comment_view_with_person, read_comment_views_with_person[0] ); // Make sure its 1, not showing the blocked comment assert_eq!(5, read_comment_views_with_person.len()); let read_comment_from_blocked_person = CommentView::read(&conn, inserted_comment_1.id, Some(inserted_person.id)).unwrap(); // Make sure block set the creator blocked assert!(read_comment_from_blocked_person.creator_blocked); let top_path = inserted_comment_0.path; let read_comment_views_top_path = CommentQuery::builder() .conn(&conn) .post_id(Some(inserted_post.id)) .parent_path(Some(top_path)) .build() .list() .unwrap(); let child_path = inserted_comment_1.to_owned().path; let read_comment_views_child_path = CommentQuery::builder() .conn(&conn) .post_id(Some(inserted_post.id)) .parent_path(Some(child_path)) .build() .list() .unwrap(); // Make sure the comment parent-limited fetch is correct assert_eq!(6, read_comment_views_top_path.len()); assert_eq!(4, read_comment_views_child_path.len()); // Make sure it contains the parent, but not the comment from the other tree let child_comments = read_comment_views_child_path .into_iter() .map(|c| c.comment) .collect::>(); assert!(child_comments.contains(&inserted_comment_1)); assert!(!child_comments.contains(&inserted_comment_2)); let read_comment_views_top_max_depth = CommentQuery::builder() .conn(&conn) .post_id(Some(inserted_post.id)) .max_depth(Some(1)) .build() .list() .unwrap(); // Make sure a depth limited one only has the top comment assert_eq!( expected_comment_view_no_person, read_comment_views_top_max_depth[0] ); assert_eq!(1, read_comment_views_top_max_depth.len()); let child_path = inserted_comment_1.path; let read_comment_views_parent_max_depth = CommentQuery::builder() .conn(&conn) .post_id(Some(inserted_post.id)) .parent_path(Some(child_path)) .max_depth(Some(1)) .sort(Some(CommentSortType::New)) .build() .list() .unwrap(); // Make sure a depth limited one, and given child comment 1, has 3 assert!(read_comment_views_parent_max_depth[2] .comment .content .eq("Comment 3")); assert_eq!(3, read_comment_views_parent_max_depth.len()); // Delete everything let like_removed = CommentLike::remove(&conn, inserted_person.id, inserted_comment_0.id).unwrap(); let num_deleted = Comment::delete(&conn, inserted_comment_0.id).unwrap(); Comment::delete(&conn, inserted_comment_1.id).unwrap(); Post::delete(&conn, inserted_post.id).unwrap(); Community::delete(&conn, inserted_community.id).unwrap(); Person::delete(&conn, inserted_person.id).unwrap(); Person::delete(&conn, inserted_person_2.id).unwrap(); assert_eq!(1, num_deleted); assert_eq!(1, like_removed); } }