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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<i16>, // Left join to PostLike
}
type PostViewTuple = (
Post,
UserSafe,
CommunitySafe,
Option<CommunityUserBan>,
PostAggregates,
Option<CommunityFollower>,
Option<PostSaved>,
Option<PostRead>,
Option<i16>,
);
impl PostView {
pub fn read(conn: &PgConnection, post_id: i32, my_user_id: Option<i32>) -> Result<Self, Error> {
// 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::<PostViewTuple>(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<i32>,
community_id: Option<i32>,
community_name: Option<String>,
my_user_id: Option<i32>,
search_term: Option<String>,
url_search: Option<String>,
show_nsfw: bool,
saved_only: bool,
unread_only: bool,
page: Option<i64>,
limit: Option<i64>,
}
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<T: MaybeOptional<i32>>(mut self, community_id: T) -> Self {
self.community_id = community_id.get_optional();
self
}
pub fn my_user_id<T: MaybeOptional<i32>>(mut self, my_user_id: T) -> Self {
self.my_user_id = my_user_id.get_optional();
self
}
pub fn community_name<T: MaybeOptional<String>>(mut self, community_name: T) -> Self {
self.community_name = community_name.get_optional();
self
}
pub fn creator_id<T: MaybeOptional<i32>>(mut self, creator_id: T) -> Self {
self.creator_id = creator_id.get_optional();
self
}
pub fn search_term<T: MaybeOptional<String>>(mut self, search_term: T) -> Self {
self.search_term = search_term.get_optional();
self
}
pub fn url_search<T: MaybeOptional<String>>(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<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
self.page = page.get_optional();
self
}
pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
self.limit = limit.get_optional();
self
}
pub fn list(self) -> Result<Vec<PostView>, 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::<Pg, _>(&query));
let res = query.load::<PostViewTuple>(self.conn)?;
Ok(PostView::from_tuple_to_vec(res))
}
}
impl ViewToVec for PostView {
type DbTuple = PostViewTuple;
fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
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::<Vec<Self>>()
}
}
#[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,
category_id: 1,
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,
category_id: 1,
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);
}
}