lemmy/crates/db_views/src/post_view.rs

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use diesel::{pg::Pg, result::Error, *};
use lemmy_db_queries::{
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aggregates::post_aggregates::PostAggregates,
functions::hot_rank,
fuzzy_search,
limit_and_offset,
ListingType,
MaybeOptional,
SortType,
ToSafe,
ViewToVec,
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};
use lemmy_db_schema::{
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schema::{
community,
community_follower,
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community_person_ban,
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person,
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post,
post_aggregates,
post_like,
post_read,
post_saved,
},
source::{
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community::{Community, CommunityFollower, CommunityPersonBan, CommunitySafe},
person::{Person, PersonSafe},
post::{Post, PostRead, PostSaved},
},
CommunityId,
PersonId,
PostId,
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};
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use log::debug;
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use serde::Serialize;
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#[derive(Debug, PartialEq, Serialize, Clone)]
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pub struct PostView {
pub post: Post,
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pub creator: PersonSafe,
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pub community: CommunitySafe,
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pub creator_banned_from_community: bool, // Left Join to CommunityPersonBan
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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
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}
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type PostViewTuple = (
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Post,
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PersonSafe,
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CommunitySafe,
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Option<CommunityPersonBan>,
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PostAggregates,
Option<CommunityFollower>,
Option<PostSaved>,
Option<PostRead>,
Option<i16>,
);
impl PostView {
pub fn read(
conn: &PgConnection,
post_id: PostId,
my_person_id: Option<PersonId>,
) -> Result<Self, Error> {
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// The left join below will return None in this case
let person_id_join = my_person_id.unwrap_or(PersonId(-1));
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let (
post,
creator,
community,
creator_banned_from_community,
counts,
follower,
saved,
read,
post_like,
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) = post::table
.find(post_id)
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.inner_join(person::table)
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.inner_join(community::table)
.left_join(
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community_person_ban::table.on(
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post::community_id
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.eq(community_person_ban::community_id)
.and(community_person_ban::person_id.eq(post::creator_id)),
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),
)
.inner_join(post_aggregates::table)
.left_join(
community_follower::table.on(
post::community_id
.eq(community_follower::community_id)
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.and(community_follower::person_id.eq(person_id_join)),
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),
)
.left_join(
post_saved::table.on(
post::id
.eq(post_saved::post_id)
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.and(post_saved::person_id.eq(person_id_join)),
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),
)
.left_join(
post_read::table.on(
post::id
.eq(post_read::post_id)
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.and(post_read::person_id.eq(person_id_join)),
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),
)
.left_join(
post_like::table.on(
post::id
.eq(post_like::post_id)
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.and(post_like::person_id.eq(person_id_join)),
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),
)
.select((
post::all_columns,
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Person::safe_columns_tuple(),
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Community::safe_columns_tuple(),
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community_person_ban::all_columns.nullable(),
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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)?;
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// 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() && post_like.is_none() {
Some(0)
} else {
post_like
};
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Ok(PostView {
post,
creator,
community,
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creator_banned_from_community: creator_banned_from_community.is_some(),
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counts,
subscribed: follower.is_some(),
saved: saved.is_some(),
read: read.is_some(),
my_vote,
})
}
}
pub struct PostQueryBuilder<'a> {
conn: &'a PgConnection,
listing_type: Option<ListingType>,
sort: Option<SortType>,
creator_id: Option<PersonId>,
community_id: Option<CommunityId>,
community_name: Option<String>,
my_person_id: Option<PersonId>,
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search_term: Option<String>,
url_search: Option<String>,
show_nsfw: Option<bool>,
show_bot_accounts: Option<bool>,
show_read_posts: Option<bool>,
saved_only: Option<bool>,
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page: Option<i64>,
limit: Option<i64>,
}
impl<'a> PostQueryBuilder<'a> {
pub fn create(conn: &'a PgConnection) -> Self {
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PostQueryBuilder {
conn,
listing_type: None,
sort: None,
creator_id: None,
community_id: None,
community_name: None,
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my_person_id: None,
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search_term: None,
url_search: None,
show_nsfw: None,
show_bot_accounts: None,
show_read_posts: None,
saved_only: None,
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page: None,
limit: None,
}
}
pub fn listing_type<T: MaybeOptional<ListingType>>(mut self, listing_type: T) -> Self {
self.listing_type = listing_type.get_optional();
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self
}
pub fn sort<T: MaybeOptional<SortType>>(mut self, sort: T) -> Self {
self.sort = sort.get_optional();
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self
}
pub fn community_id<T: MaybeOptional<CommunityId>>(mut self, community_id: T) -> Self {
self.community_id = community_id.get_optional();
self
}
pub fn my_person_id<T: MaybeOptional<PersonId>>(mut self, my_person_id: T) -> Self {
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self.my_person_id = my_person_id.get_optional();
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self
}
pub fn community_name<T: MaybeOptional<String>>(mut self, community_name: T) -> Self {
self.community_name = community_name.get_optional();
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self
}
pub fn creator_id<T: MaybeOptional<PersonId>>(mut self, creator_id: T) -> Self {
self.creator_id = creator_id.get_optional();
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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<T: MaybeOptional<bool>>(mut self, show_nsfw: T) -> Self {
self.show_nsfw = show_nsfw.get_optional();
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self
}
pub fn show_bot_accounts<T: MaybeOptional<bool>>(mut self, show_bot_accounts: T) -> Self {
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self.show_bot_accounts = show_bot_accounts.get_optional();
self
}
pub fn show_read_posts<T: MaybeOptional<bool>>(mut self, show_read_posts: T) -> Self {
self.show_read_posts = show_read_posts.get_optional();
self
}
pub fn saved_only<T: MaybeOptional<bool>>(mut self, saved_only: T) -> Self {
self.saved_only = saved_only.get_optional();
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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 person_id_join = self.my_person_id.unwrap_or(PersonId(-1));
let mut query = post::table
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.inner_join(person::table)
.inner_join(community::table)
.left_join(
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community_person_ban::table.on(
post::community_id
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.eq(community_person_ban::community_id)
.and(community_person_ban::person_id.eq(post::creator_id)),
),
)
.inner_join(post_aggregates::table)
.left_join(
community_follower::table.on(
post::community_id
.eq(community_follower::community_id)
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.and(community_follower::person_id.eq(person_id_join)),
),
)
.left_join(
post_saved::table.on(
post::id
.eq(post_saved::post_id)
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.and(post_saved::person_id.eq(person_id_join)),
),
)
.left_join(
post_read::table.on(
post::id
.eq(post_read::post_id)
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.and(post_read::person_id.eq(person_id_join)),
),
)
.left_join(
post_like::table.on(
post::id
.eq(post_like::post_id)
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.and(post_like::person_id.eq(person_id_join)),
),
)
.select((
post::all_columns,
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Person::safe_columns_tuple(),
Community::safe_columns_tuple(),
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community_person_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();
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if let Some(listing_type) = self.listing_type {
query = match listing_type {
ListingType::Subscribed => query.filter(community_follower::person_id.is_not_null()),
ListingType::Local => query.filter(community::local.eq(true)),
_ => query,
};
}
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if let Some(community_id) = self.community_id {
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query = query
.filter(post::community_id.eq(community_id))
.then_order_by(post_aggregates::stickied.desc());
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}
if let Some(community_name) = self.community_name {
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query = query
.filter(community::name.eq(community_name))
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.filter(community::local.eq(true))
.then_order_by(post_aggregates::stickied.desc());
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}
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)),
);
}
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// If its for a specific person, 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.unwrap_or(true) {
query = query
.filter(post::nsfw.eq(false))
.filter(community::nsfw.eq(false));
};
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if !self.show_bot_accounts.unwrap_or(true) {
query = query.filter(person::bot_account.eq(false));
};
if !self.show_read_posts.unwrap_or(true) {
query = query.filter(post_read::id.is_null());
};
if self.saved_only.unwrap_or(false) {
query = query.filter(post_saved::id.is_not_null());
};
query = match self.sort.unwrap_or(SortType::Hot) {
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SortType::Active => query
.then_order_by(
hot_rank(
post_aggregates::score,
post_aggregates::newest_comment_time_necro,
)
.desc(),
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)
.then_order_by(post_aggregates::newest_comment_time_necro.desc()),
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SortType::Hot => query
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.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()),
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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);
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query = query
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.limit(limit)
.offset(offset)
.filter(post::removed.eq(false))
.filter(post::deleted.eq(false))
.filter(community::removed.eq(false))
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.filter(community::deleted.eq(false));
debug!("Post View Query: {:?}", debug_query::<Pg, _>(&query));
let res = query.load::<PostViewTuple>(self.conn)?;
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Ok(PostView::from_tuple_to_vec(res))
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}
}
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impl ViewToVec for PostView {
type DbTuple = PostViewTuple;
fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
items
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.iter()
.map(|a| Self {
post: a.0.to_owned(),
creator: a.1.to_owned(),
community: a.2.to_owned(),
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creator_banned_from_community: a.3.is_some(),
counts: a.4.to_owned(),
subscribed: a.5.is_some(),
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saved: a.6.is_some(),
read: a.7.is_some(),
my_vote: a.8,
})
.collect::<Vec<Self>>()
}
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}
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#[cfg(test)]
mod tests {
use crate::post_view::{PostQueryBuilder, PostView};
use lemmy_db_queries::{
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aggregates::post_aggregates::PostAggregates,
establish_unpooled_connection,
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Crud,
Likeable,
ListingType,
SortType,
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};
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use lemmy_db_schema::source::{community::*, person::*, post::*};
use serial_test::serial;
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#[test]
#[serial]
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fn test_crud() {
let conn = establish_unpooled_connection();
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let person_name = "tegan".to_string();
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let community_name = "test_community_3".to_string();
let post_name = "test post 3".to_string();
let bot_post_name = "test bot post".to_string();
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let new_person = PersonForm {
name: person_name.to_owned(),
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..PersonForm::default()
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};
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let inserted_person = Person::create(&conn, &new_person).unwrap();
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let new_bot = PersonForm {
name: person_name.to_owned(),
bot_account: Some(true),
..PersonForm::default()
};
let inserted_bot = Person::create(&conn, &new_bot).unwrap();
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let new_community = CommunityForm {
name: community_name.to_owned(),
title: "nada".to_owned(),
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..CommunityForm::default()
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};
let inserted_community = Community::create(&conn, &new_community).unwrap();
let new_post = PostForm {
name: post_name.to_owned(),
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creator_id: inserted_person.id,
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community_id: inserted_community.id,
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..PostForm::default()
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};
let inserted_post = Post::create(&conn, &new_post).unwrap();
let new_bot_post = PostForm {
name: bot_post_name,
creator_id: inserted_bot.id,
community_id: inserted_community.id,
..PostForm::default()
};
let _inserted_bot_post = Post::create(&conn, &new_bot_post).unwrap();
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let post_like_form = PostLikeForm {
post_id: inserted_post.id,
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person_id: inserted_person.id,
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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,
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person_id: inserted_person.id,
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published: inserted_post_like.published,
score: 1,
};
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let read_post_listings_with_person = PostQueryBuilder::create(&conn)
.listing_type(ListingType::Community)
.sort(SortType::New)
.show_bot_accounts(false)
.community_id(inserted_community.id)
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.my_person_id(inserted_person.id)
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.list()
.unwrap();
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let read_post_listings_no_person = PostQueryBuilder::create(&conn)
.listing_type(ListingType::Community)
.sort(SortType::New)
.community_id(inserted_community.id)
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.list()
.unwrap();
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let read_post_listing_no_person = PostView::read(&conn, inserted_post.id, None).unwrap();
let read_post_listing_with_person =
PostView::read(&conn, inserted_post.id, Some(inserted_person.id)).unwrap();
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let agg = PostAggregates::read(&conn, inserted_post.id).unwrap();
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// the non person version
let expected_post_listing_no_person = PostView {
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post: Post {
id: inserted_post.id,
name: post_name,
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creator_id: inserted_person.id,
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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,
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creator: PersonSafe {
id: inserted_person.id,
name: person_name,
display_name: None,
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published: inserted_person.published,
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avatar: None,
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actor_id: inserted_person.actor_id.to_owned(),
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local: true,
admin: false,
bot_account: false,
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banned: false,
deleted: false,
bio: None,
banner: None,
updated: None,
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inbox_url: inserted_person.inbox_url.to_owned(),
shared_inbox_url: None,
matrix_user_id: None,
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},
creator_banned_from_community: false,
community: CommunitySafe {
id: inserted_community.id,
name: community_name,
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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,
published: inserted_community.published,
},
counts: PostAggregates {
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id: agg.id,
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post_id: inserted_post.id,
comments: 0,
score: 1,
upvotes: 1,
downvotes: 0,
stickied: false,
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published: agg.published,
newest_comment_time_necro: inserted_post.published,
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newest_comment_time: inserted_post.published,
},
subscribed: false,
read: false,
saved: false,
};
// TODO More needs to be added here
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let mut expected_post_listing_with_user = expected_post_listing_no_person.to_owned();
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expected_post_listing_with_user.my_vote = Some(1);
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let like_removed = PostLike::remove(&conn, inserted_person.id, inserted_post.id).unwrap();
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let num_deleted = Post::delete(&conn, inserted_post.id).unwrap();
Community::delete(&conn, inserted_community.id).unwrap();
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Person::delete(&conn, inserted_person.id).unwrap();
Person::delete(&conn, inserted_bot.id).unwrap();
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// The with user
assert_eq!(
expected_post_listing_with_user,
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read_post_listings_with_person[0]
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);
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assert_eq!(
expected_post_listing_with_user,
read_post_listing_with_person
);
// Should be only one person, IE the bot post should be missing
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assert_eq!(1, read_post_listings_with_person.len());
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// Without the user
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assert_eq!(
expected_post_listing_no_person,
read_post_listings_no_person[1]
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);
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assert_eq!(expected_post_listing_no_person, read_post_listing_no_person);
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// Should be 2 posts, with the bot post
assert_eq!(2, read_post_listings_no_person.len());
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assert_eq!(expected_post_like, inserted_post_like);
assert_eq!(1, like_removed);
assert_eq!(1, num_deleted);
}
}