lemmy/crates/db_views_actor/src/person_mention_view.rs

210 lines
6.1 KiB
Rust

use crate::structs::PersonMentionView;
use diesel::{
dsl::now,
pg::Pg,
result::Error,
BoolExpressionMethods,
ExpressionMethods,
JoinOnDsl,
NullableExpressionMethods,
QueryDsl,
};
use diesel_async::RunQueryDsl;
use lemmy_db_schema::{
aliases,
newtypes::{PersonId, PersonMentionId},
schema::{
comment,
comment_aggregates,
comment_like,
comment_saved,
community,
community_follower,
community_person_ban,
person,
person_block,
person_mention,
post,
},
source::community::CommunityFollower,
utils::{get_conn, limit_and_offset, DbConn, DbPool, ListFn, Queries, ReadFn},
CommentSortType,
};
fn queries<'a>() -> Queries<
impl ReadFn<'a, PersonMentionView, (PersonMentionId, Option<PersonId>)>,
impl ListFn<'a, PersonMentionView, PersonMentionQuery>,
> {
let all_joins = |query: person_mention::BoxedQuery<'a, Pg>, my_person_id: Option<PersonId>| {
// The left join below will return None in this case
let person_id_join = my_person_id.unwrap_or(PersonId(-1));
query
.inner_join(comment::table)
.inner_join(person::table.on(comment::creator_id.eq(person::id)))
.inner_join(post::table.on(comment::post_id.eq(post::id)))
.inner_join(community::table.on(post::community_id.eq(community::id)))
.inner_join(aliases::person1)
.inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
.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)),
),
)
};
let selection = (
person_mention::all_columns,
comment::all_columns,
person::all_columns,
post::all_columns,
community::all_columns,
aliases::person1.fields(person::all_columns),
comment_aggregates::all_columns,
community_person_ban::id.nullable().is_not_null(),
CommunityFollower::select_subscribed_type(),
comment_saved::id.nullable().is_not_null(),
person_block::id.nullable().is_not_null(),
comment_like::score.nullable(),
);
let read =
move |mut conn: DbConn<'a>,
(person_mention_id, my_person_id): (PersonMentionId, Option<PersonId>)| async move {
all_joins(
person_mention::table.find(person_mention_id).into_boxed(),
my_person_id,
)
.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)),
),
)
.select(selection)
.first::<PersonMentionView>(&mut conn)
.await
};
let list = move |mut conn: DbConn<'a>, options: PersonMentionQuery| async move {
let mut query = all_joins(person_mention::table.into_boxed(), options.my_person_id)
.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)),
),
),
)
.select(selection);
if let Some(recipient_id) = options.recipient_id {
query = query.filter(person_mention::recipient_id.eq(recipient_id));
}
if options.unread_only {
query = query.filter(person_mention::read.eq(false));
}
if !options.show_bot_accounts {
query = query.filter(person::bot_account.eq(false));
};
query = match options.sort.unwrap_or(CommentSortType::Hot) {
CommentSortType::Hot => query.then_order_by(comment_aggregates::hot_rank.desc()),
CommentSortType::Controversial => {
query.then_order_by(comment_aggregates::controversy_rank.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()),
};
let (limit, offset) = limit_and_offset(options.page, options.limit)?;
query
.limit(limit)
.offset(offset)
.load::<PersonMentionView>(&mut conn)
.await
};
Queries::new(read, list)
}
impl PersonMentionView {
pub async fn read(
pool: &mut DbPool<'_>,
person_mention_id: PersonMentionId,
my_person_id: Option<PersonId>,
) -> Result<Self, Error> {
queries()
.read(pool, (person_mention_id, my_person_id))
.await
}
/// Gets the number of unread mentions
pub async fn get_unread_mentions(
pool: &mut DbPool<'_>,
my_person_id: PersonId,
) -> Result<i64, Error> {
use diesel::dsl::count;
let conn = &mut get_conn(pool).await?;
person_mention::table
.inner_join(comment::table)
.filter(person_mention::recipient_id.eq(my_person_id))
.filter(person_mention::read.eq(false))
.filter(comment::deleted.eq(false))
.filter(comment::removed.eq(false))
.select(count(person_mention::id))
.first::<i64>(conn)
.await
}
}
#[derive(Default)]
pub struct PersonMentionQuery {
pub my_person_id: Option<PersonId>,
pub recipient_id: Option<PersonId>,
pub sort: Option<CommentSortType>,
pub unread_only: bool,
pub show_bot_accounts: bool,
pub page: Option<i64>,
pub limit: Option<i64>,
}
impl PersonMentionQuery {
pub async fn list(self, pool: &mut DbPool<'_>) -> Result<Vec<PersonMentionView>, Error> {
queries().list(pool, self).await
}
}