From: Dessalines Date: Thu, 10 Dec 2020 20:53:49 +0000 (-0500) Subject: Starting to add post_view. X-Git-Url: http://these/git/%7B%60%24%7BwebArchiveUrl%7D/%22%7B%7D/%24%7B%60data:application/%22https:/hacktivis.me/README.ru.md?a=commitdiff_plain;h=eef93440d031a412109ba927a91572f459d3c9c7;p=lemmy.git Starting to add post_view. --- diff --git a/lemmy_db/src/aggregates/mod.rs b/lemmy_db/src/aggregates/mod.rs index 9f38f2ed..e033aede 100644 --- a/lemmy_db/src/aggregates/mod.rs +++ b/lemmy_db/src/aggregates/mod.rs @@ -1,3 +1,4 @@ pub mod community_aggregates; +pub mod post_aggregates; pub mod site_aggregates; pub mod user_aggregates; diff --git a/lemmy_db/src/aggregates/post_aggregates.rs b/lemmy_db/src/aggregates/post_aggregates.rs new file mode 100644 index 00000000..e009cacb --- /dev/null +++ b/lemmy_db/src/aggregates/post_aggregates.rs @@ -0,0 +1,268 @@ +use crate::schema::post_aggregates; +use diesel::{result::Error, *}; +use serde::Serialize; + +#[derive(Queryable, Associations, Identifiable, PartialEq, Debug, Serialize, Clone)] +#[table_name = "post_aggregates"] +pub struct PostAggregates { + pub id: i32, + pub post_id: i32, + pub comments: i64, + pub score: i64, + pub upvotes: i64, + pub downvotes: i64, + pub newest_comment_time: chrono::NaiveDateTime, +} + +impl PostAggregates { + pub fn read(conn: &PgConnection, post_id: i32) -> Result { + post_aggregates::table + .filter(post_aggregates::post_id.eq(post_id)) + .first::(conn) + } +} + +// #[cfg(test)] +// mod tests { +// use crate::{ +// aggregates::community_aggregates::CommunityAggregates, +// comment::{Comment, CommentForm}, +// community::{Community, CommunityFollower, CommunityFollowerForm, CommunityForm}, +// post::{Post, PostForm}, +// tests::establish_unpooled_connection, +// user::{UserForm, User_}, +// Crud, +// Followable, +// ListingType, +// SortType, +// }; + +// #[test] +// fn test_crud() { +// let conn = establish_unpooled_connection(); + +// let new_user = UserForm { +// name: "thommy_community_agg".into(), +// preferred_username: None, +// password_encrypted: "nope".into(), +// email: None, +// matrix_user_id: None, +// avatar: None, +// banner: None, +// admin: false, +// banned: Some(false), +// published: None, +// updated: None, +// 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, +// }; + +// let inserted_user = User_::create(&conn, &new_user).unwrap(); + +// let another_user = UserForm { +// name: "jerry_community_agg".into(), +// preferred_username: None, +// password_encrypted: "nope".into(), +// email: None, +// matrix_user_id: None, +// avatar: None, +// banner: None, +// admin: false, +// banned: Some(false), +// published: None, +// updated: None, +// 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, +// }; + +// let another_inserted_user = User_::create(&conn, &another_user).unwrap(); + +// let new_community = CommunityForm { +// name: "TIL_community_agg".into(), +// creator_id: inserted_user.id, +// title: "nada".to_owned(), +// description: None, +// category_id: 1, +// nsfw: false, +// removed: None, +// deleted: None, +// updated: None, +// actor_id: None, +// local: true, +// private_key: None, +// public_key: None, +// last_refreshed_at: None, +// published: None, +// icon: None, +// banner: None, +// }; + +// let inserted_community = Community::create(&conn, &new_community).unwrap(); + +// let another_community = CommunityForm { +// name: "TIL_community_agg_2".into(), +// creator_id: inserted_user.id, +// title: "nada".to_owned(), +// description: None, +// category_id: 1, +// nsfw: false, +// removed: None, +// deleted: None, +// updated: None, +// actor_id: None, +// local: true, +// private_key: None, +// public_key: None, +// last_refreshed_at: None, +// published: None, +// icon: None, +// banner: None, +// }; + +// let another_inserted_community = Community::create(&conn, &another_community).unwrap(); + +// let first_user_follow = CommunityFollowerForm { +// community_id: inserted_community.id, +// user_id: inserted_user.id, +// pending: false, +// }; + +// CommunityFollower::follow(&conn, &first_user_follow).unwrap(); + +// let second_user_follow = CommunityFollowerForm { +// community_id: inserted_community.id, +// user_id: another_inserted_user.id, +// pending: false, +// }; + +// CommunityFollower::follow(&conn, &second_user_follow).unwrap(); + +// let another_community_follow = CommunityFollowerForm { +// community_id: another_inserted_community.id, +// user_id: inserted_user.id, +// pending: false, +// }; + +// CommunityFollower::follow(&conn, &another_community_follow).unwrap(); + +// let new_post = PostForm { +// name: "A test post".into(), +// url: None, +// body: None, +// creator_id: inserted_user.id, +// community_id: inserted_community.id, +// removed: None, +// deleted: None, +// locked: None, +// stickied: None, +// nsfw: false, +// updated: None, +// 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 comment_form = CommentForm { +// content: "A test comment".into(), +// creator_id: inserted_user.id, +// post_id: inserted_post.id, +// removed: None, +// deleted: None, +// read: None, +// parent_id: None, +// published: None, +// updated: None, +// ap_id: None, +// local: true, +// }; + +// let inserted_comment = Comment::create(&conn, &comment_form).unwrap(); + +// let child_comment_form = CommentForm { +// content: "A test comment".into(), +// creator_id: inserted_user.id, +// post_id: inserted_post.id, +// removed: None, +// deleted: None, +// read: None, +// parent_id: Some(inserted_comment.id), +// published: None, +// updated: None, +// ap_id: None, +// local: true, +// }; + +// let _inserted_child_comment = Comment::create(&conn, &child_comment_form).unwrap(); + +// let community_aggregates_before_delete = +// CommunityAggregates::read(&conn, inserted_community.id).unwrap(); + +// assert_eq!(2, community_aggregates_before_delete.subscribers); +// assert_eq!(1, community_aggregates_before_delete.posts); +// assert_eq!(2, community_aggregates_before_delete.comments); + +// // Test the other community +// let another_community_aggs = +// CommunityAggregates::read(&conn, another_inserted_community.id).unwrap(); +// assert_eq!(1, another_community_aggs.subscribers); +// assert_eq!(0, another_community_aggs.posts); +// assert_eq!(0, another_community_aggs.comments); + +// // Unfollow test +// CommunityFollower::unfollow(&conn, &second_user_follow).unwrap(); +// let after_unfollow = CommunityAggregates::read(&conn, inserted_community.id).unwrap(); +// assert_eq!(1, after_unfollow.subscribers); + +// // Follow again just for the later tests +// CommunityFollower::follow(&conn, &second_user_follow).unwrap(); +// let after_follow_again = CommunityAggregates::read(&conn, inserted_community.id).unwrap(); +// assert_eq!(2, after_follow_again.subscribers); + +// // Remove a parent comment (the comment count should also be 0) +// Post::delete(&conn, inserted_post.id).unwrap(); +// let after_parent_post_delete = CommunityAggregates::read(&conn, inserted_community.id).unwrap(); +// assert_eq!(0, after_parent_post_delete.comments); +// assert_eq!(0, after_parent_post_delete.posts); + +// // Remove the 2nd user +// User_::delete(&conn, another_inserted_user.id).unwrap(); +// let after_user_delete = CommunityAggregates::read(&conn, inserted_community.id).unwrap(); +// assert_eq!(1, after_user_delete.subscribers); + +// // This should delete all the associated rows, and fire triggers +// let user_num_deleted = User_::delete(&conn, inserted_user.id).unwrap(); +// assert_eq!(1, user_num_deleted); + +// // Should be none found, since the creator was deleted +// let after_delete = CommunityAggregates::read(&conn, inserted_community.id); +// assert!(after_delete.is_err()); +// } +// } diff --git a/lemmy_db/src/post.rs b/lemmy_db/src/post.rs index 530f475b..5767c72b 100644 --- a/lemmy_db/src/post.rs +++ b/lemmy_db/src/post.rs @@ -8,9 +8,10 @@ use crate::{ Saveable, }; use diesel::{dsl::*, result::Error, *}; +use serde::Serialize; use url::{ParseError, Url}; -#[derive(Queryable, Identifiable, PartialEq, Debug)] +#[derive(Clone, Queryable, Identifiable, PartialEq, Debug, Serialize)] #[table_name = "post"] pub struct Post { pub id: i32, diff --git a/lemmy_db/src/schema.rs b/lemmy_db/src/schema.rs index e6dd6d4b..b0c57f5e 100644 --- a/lemmy_db/src/schema.rs +++ b/lemmy_db/src/schema.rs @@ -329,6 +329,18 @@ table! { } } +table! { + post_aggregates (id) { + id -> Int4, + post_id -> Int4, + comments -> Int8, + score -> Int8, + upvotes -> Int8, + downvotes -> Int8, + newest_comment_time -> Timestamp, + } +} + table! { post_aggregates_fast (id) { id -> Int4, @@ -576,6 +588,7 @@ joinable!(mod_sticky_post -> user_ (mod_user_id)); joinable!(password_reset_request -> user_ (user_id)); joinable!(post -> community (community_id)); joinable!(post -> user_ (creator_id)); +joinable!(post_aggregates -> post (post_id)); joinable!(post_like -> post (post_id)); joinable!(post_like -> user_ (user_id)); joinable!(post_read -> post (post_id)); @@ -614,6 +627,7 @@ allow_tables_to_appear_in_same_query!( mod_sticky_post, password_reset_request, post, + post_aggregates, post_aggregates_fast, post_like, post_read, diff --git a/lemmy_db/src/views/community_view.rs b/lemmy_db/src/views/community_view.rs index cbb90a42..1ddbba64 100644 --- a/lemmy_db/src/views/community_view.rs +++ b/lemmy_db/src/views/community_view.rs @@ -32,7 +32,7 @@ impl CommunityView { // The left join below will return None in this case let user_id_join = my_user_id.unwrap_or(-1); - let (community, creator, category, counts, subscribed) = community::table + let (community, creator, category, counts, follower) = community::table .find(community_id) .inner_join(user_::table) .inner_join(category::table) @@ -63,7 +63,7 @@ impl CommunityView { community, creator, category, - subscribed: subscribed.is_some(), + subscribed: follower.is_some(), counts, }) } diff --git a/lemmy_db/src/views/mod.rs b/lemmy_db/src/views/mod.rs index 0aff8eae..a8112f08 100644 --- a/lemmy_db/src/views/mod.rs +++ b/lemmy_db/src/views/mod.rs @@ -2,7 +2,6 @@ pub mod community_follower_view; pub mod community_moderator_view; pub mod community_user_ban_view; pub mod community_view; +pub mod post_view; pub mod site_view; pub mod user_view; - -// TODO Every single aggregate trigger is likely broken, you need to test every one of these out diff --git a/lemmy_db/src/views/post_view.rs b/lemmy_db/src/views/post_view.rs new file mode 100644 index 00000000..f7b6ac78 --- /dev/null +++ b/lemmy_db/src/views/post_view.rs @@ -0,0 +1,576 @@ +use crate::{ + aggregates::post_aggregates::PostAggregates, + community::{Community, CommunityFollower, CommunitySafe, CommunityUserBan}, + functions::hot_rank, + fuzzy_search, + limit_and_offset, + post::{Post, PostRead, PostSaved}, + schema::{ + community, + community_follower, + community_user_ban, + post, + post_aggregates, + post_like, + post_read, + post_saved, + user_, + }, + user::{UserSafe, User_}, + ListingType, + MaybeOptional, + SortType, + ToSafe, +}; +use diesel::{result::Error, *}; +use serde::Serialize; + +#[derive(Debug, Serialize, Clone)] +pub struct PostView { + pub post: Post, + pub creator: UserSafe, + pub community: CommunitySafe, + pub counts: PostAggregates, + pub subscribed: bool, // Left join to CommunityFollower + pub banned_from_community: bool, // Left Join to CommunityUserBan + pub saved: bool, // Left join to PostSaved + pub read: bool, // Left join to PostRead + pub my_vote: Option, // Left join to PostLike +} + +type OutputTuple = ( + Post, + UserSafe, + CommunitySafe, + PostAggregates, + Option, + 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, counts, follower, banned_from_community, saved, read, my_vote) = + post::table + .find(post_id) + .inner_join(user_::table) + .inner_join(community::table) + .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( + community_user_ban::table.on( + post::community_id + .eq(community_user_ban::community_id) + .and(community_user_ban::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(), + post_aggregates::all_columns, + community_follower::all_columns.nullable(), + community_user_ban::all_columns.nullable(), + post_saved::all_columns.nullable(), + post_read::all_columns.nullable(), + post_like::score.nullable(), + )) + .first::(conn)?; + + Ok(PostView { + post, + creator, + community, + counts, + subscribed: follower.is_some(), + banned_from_community: banned_from_community.is_some(), + saved: saved.is_some(), + read: read.is_some(), + my_vote, + }) + } +} + +mod join_types { + use crate::schema::{ + community, + community_follower, + community_user_ban, + post, + post_aggregates, + post_like, + post_read, + post_saved, + user_, + }; + use diesel::{ + pg::Pg, + query_builder::BoxedSelectStatement, + query_source::joins::{Inner, Join, JoinOn, LeftOuter}, + sql_types::*, + }; + + /// TODO awful, but necessary because of the boxed join + pub(super) type BoxedPostJoin<'a> = BoxedSelectStatement< + 'a, + ( + ( + Integer, + Text, + Nullable, + Nullable, + Integer, + Integer, + Bool, + Bool, + Timestamp, + Nullable, + Bool, + Bool, + Bool, + Nullable, + Nullable, + Nullable, + Nullable, + Text, + Bool, + ), + ( + Integer, + Text, + Nullable, + Nullable, + Bool, + Bool, + Timestamp, + Nullable, + Nullable, + Text, + Nullable, + Bool, + Nullable, + Bool, + ), + ( + Integer, + Text, + Text, + Nullable, + Integer, + Integer, + Bool, + Timestamp, + Nullable, + Bool, + Bool, + Text, + Bool, + Nullable, + Nullable, + ), + (Integer, Integer, BigInt, BigInt, BigInt, BigInt, Timestamp), + Nullable<(Integer, Integer, Integer, Timestamp, Nullable)>, + Nullable<(Integer, Integer, Integer, Timestamp)>, + Nullable<(Integer, Integer, Integer, Timestamp)>, + Nullable<(Integer, Integer, Integer, Timestamp)>, + Nullable, + ), + JoinOn< + Join< + JoinOn< + Join< + JoinOn< + Join< + JoinOn< + Join< + JoinOn< + Join< + JoinOn< + Join< + JoinOn< + Join< + JoinOn< + Join, + diesel::expression::operators::Eq< + diesel::expression::nullable::Nullable< + post::columns::creator_id, + >, + diesel::expression::nullable::Nullable, + >, + >, + community::table, + Inner, + >, + diesel::expression::operators::Eq< + diesel::expression::nullable::Nullable, + diesel::expression::nullable::Nullable, + >, + >, + post_aggregates::table, + Inner, + >, + diesel::expression::operators::Eq< + diesel::expression::nullable::Nullable< + post_aggregates::columns::post_id, + >, + diesel::expression::nullable::Nullable, + >, + >, + community_follower::table, + LeftOuter, + >, + diesel::expression::operators::And< + diesel::expression::operators::Eq< + post::columns::community_id, + community_follower::columns::community_id, + >, + diesel::expression::operators::Eq< + community_follower::columns::user_id, + diesel::expression::bound::Bound, + >, + >, + >, + community_user_ban::table, + LeftOuter, + >, + diesel::expression::operators::And< + diesel::expression::operators::Eq< + post::columns::community_id, + community_user_ban::columns::community_id, + >, + diesel::expression::operators::Eq< + community_user_ban::columns::user_id, + diesel::expression::bound::Bound, + >, + >, + >, + post_saved::table, + LeftOuter, + >, + diesel::expression::operators::And< + diesel::expression::operators::Eq, + diesel::expression::operators::Eq< + post_saved::columns::user_id, + diesel::expression::bound::Bound, + >, + >, + >, + post_read::table, + LeftOuter, + >, + diesel::expression::operators::And< + diesel::expression::operators::Eq, + diesel::expression::operators::Eq< + post_read::columns::user_id, + diesel::expression::bound::Bound, + >, + >, + >, + post_like::table, + LeftOuter, + >, + diesel::expression::operators::And< + diesel::expression::operators::Eq, + diesel::expression::operators::Eq< + post_like::columns::user_id, + diesel::expression::bound::Bound, + >, + >, + >, + Pg, + >; +} + +pub struct PostQueryBuilder<'a> { + conn: &'a PgConnection, + query: join_types::BoxedPostJoin<'a>, + listing_type: &'a ListingType, + sort: &'a SortType, + for_creator_id: Option, + for_community_id: Option, + for_community_name: 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, my_user_id: Option) -> Self { + // The left join below will return None in this case + let user_id_join = my_user_id.unwrap_or(-1); + + let query = post::table + .inner_join(user_::table) + .inner_join(community::table) + .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( + community_user_ban::table.on( + post::community_id + .eq(community_user_ban::community_id) + .and(community_user_ban::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(), + post_aggregates::all_columns, + community_follower::all_columns.nullable(), + community_user_ban::all_columns.nullable(), + post_saved::all_columns.nullable(), + post_read::all_columns.nullable(), + post_like::score.nullable(), + )) + .into_boxed(); + + PostQueryBuilder { + conn, + query, + listing_type: &ListingType::All, + sort: &SortType::Hot, + for_creator_id: None, + for_community_id: None, + for_community_name: 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 for_community_id>(mut self, for_community_id: T) -> Self { + self.for_community_id = for_community_id.get_optional(); + self + } + + pub fn for_community_name>(mut self, for_community_name: T) -> Self { + self.for_community_name = for_community_name.get_optional(); + self + } + + pub fn for_creator_id>(mut self, for_creator_id: T) -> Self { + self.for_creator_id = for_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::*; + + let mut query = self.query; + + 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(for_community_id) = self.for_community_id { + query = query + .filter(post::community_id.eq(for_community_id)) + .then_order_by(post::stickied.desc()); + } + + if let Some(for_community_name) = self.for_community_name { + query = query + .filter(community::name.eq(for_community_name)) + .filter(community::local.eq(true)) + .then_order_by(post::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)), + ); + } + + query = match self.sort { + SortType::Active => query + .then_order_by( + hot_rank(post_aggregates::score, post_aggregates::newest_comment_time).desc(), + ) + .then_order_by(post::published.desc()), + SortType::Hot => query + .then_order_by(hot_rank(post_aggregates::score, post::published).desc()) + .then_order_by(post::published.desc()), + SortType::New => query.then_order_by(post::published.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()), + }; + + // If its for a specific user, show the removed / deleted + if let Some(for_creator_id) = self.for_creator_id { + query = query.filter(post::creator_id.eq(for_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()); + }; + + let (limit, offset) = limit_and_offset(self.page, self.limit); + + let res = 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)) + .load::(self.conn)?; + + Ok(to_vec(res)) + } +} + +// TODO turn this into a trait with an associated type +fn to_vec(posts: Vec) -> Vec { + posts + .iter() + .map(|a| PostView { + post: a.0.to_owned(), + creator: a.1.to_owned(), + community: a.2.to_owned(), + counts: a.3.to_owned(), + subscribed: a.4.is_some(), + banned_from_community: a.5.is_some(), + saved: a.6.is_some(), + read: a.7.is_some(), + my_vote: a.8, + }) + .collect::>() +} diff --git a/migrations/2020-12-10-152350_create_post_aggregates/down.sql b/migrations/2020-12-10-152350_create_post_aggregates/down.sql new file mode 100644 index 00000000..113f26d0 --- /dev/null +++ b/migrations/2020-12-10-152350_create_post_aggregates/down.sql @@ -0,0 +1,9 @@ +-- post aggregates +drop table post_aggregates; +drop trigger post_aggregates_post on post; +drop trigger post_aggregates_comment_count on comment; +drop trigger post_aggregates_score on post_like; +drop function + post_aggregates_post, + post_aggregates_comment_count, + post_aggregates_score; diff --git a/migrations/2020-12-10-152350_create_post_aggregates/up.sql b/migrations/2020-12-10-152350_create_post_aggregates/up.sql new file mode 100644 index 00000000..f9321beb --- /dev/null +++ b/migrations/2020-12-10-152350_create_post_aggregates/up.sql @@ -0,0 +1,107 @@ +-- Add post aggregates +create table post_aggregates ( + id serial primary key, + post_id int references post on update cascade on delete cascade not null, + comments bigint not null default 0, + score bigint not null default 0, + upvotes bigint not null default 0, + downvotes bigint not null default 0, + newest_comment_time timestamp not null default now(), + unique (post_id) +); + +insert into post_aggregates (post_id, comments, score, upvotes, downvotes, newest_comment_time) + select + p.id, + coalesce(ct.comments, 0::bigint) as comments, + coalesce(pl.score, 0::bigint) as score, + coalesce(pl.upvotes, 0::bigint) as upvotes, + coalesce(pl.downvotes, 0::bigint) as downvotes, + greatest(ct.recent_comment_time, p.published) as newest_activity_time + from post p + left join ( + select comment.post_id, + count(*) as comments, + max(comment.published) as recent_comment_time + from comment + group by comment.post_id + ) ct on ct.post_id = p.id + left join ( + select post_like.post_id, + sum(post_like.score) as score, + sum(post_like.score) filter (where post_like.score = 1) as upvotes, + -sum(post_like.score) filter (where post_like.score = '-1'::integer) as downvotes + from post_like + group by post_like.post_id + ) pl on pl.post_id = p.id; + +-- Add community aggregate triggers + +-- initial post add +create function post_aggregates_post() +returns trigger language plpgsql +as $$ +begin + IF (TG_OP = 'INSERT') THEN + insert into post_aggregates (post_id) values (NEW.id); + ELSIF (TG_OP = 'DELETE') THEN + delete from post_aggregates where post_id = OLD.id; + END IF; + return null; +end $$; + +create trigger post_aggregates_post +after insert or delete on post +for each row +execute procedure post_aggregates_post(); + +-- comment count +create function post_aggregates_comment_count() +returns trigger language plpgsql +as $$ +begin + IF (TG_OP = 'INSERT') THEN + update post_aggregates pa + set comments = comments + 1, + newest_comment_time = NEW.published + where pa.post_id = NEW.post_id; + ELSIF (TG_OP = 'DELETE') THEN + update post_aggregates pa + set comments = comments - 1 + where pa.post_id = OLD.post_id; + END IF; + return null; +end $$; + +create trigger post_aggregates_comment_count +after insert or delete on comment +for each row +execute procedure post_aggregates_comment_count(); + +-- post score +create function post_aggregates_score() +returns trigger language plpgsql +as $$ +begin + IF (TG_OP = 'INSERT') THEN + update post_aggregates pa + set score = score + NEW.score, + upvotes = case when NEW.score = 1 then upvotes + 1 else upvotes end, + downvotes = case when NEW.score = -1 then downvotes + 1 else downvotes end + where pa.post_id = NEW.post_id; + + ELSIF (TG_OP = 'DELETE') THEN + update post_aggregates pa + set score = score - OLD.score, + upvotes = case when OLD.score = 1 then upvotes - 1 else upvotes end, + downvotes = case when OLD.score = -1 then downvotes - 1 else downvotes end + where pa.post_id = OLD.post_id; + + END IF; + return null; +end $$; + +create trigger post_aggregates_score +after insert or delete on post_like +for each row +execute procedure post_aggregates_score();