lemmy/crates/db_views_actor/src/person_mention_view.rs

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use crate::structs::PersonMentionView;
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use diesel::{
dsl::exists,
pg::Pg,
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result::Error,
sql_types,
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BoolExpressionMethods,
BoxableExpression,
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ExpressionMethods,
IntoSql,
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JoinOnDsl,
NullableExpressionMethods,
QueryDsl,
};
use diesel_async::RunQueryDsl;
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use lemmy_db_schema::{
aliases,
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newtypes::{PersonId, PersonMentionId},
schema::{
comment,
comment_aggregates,
comment_like,
comment_saved,
community,
community_follower,
community_moderator,
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community_person_ban,
local_user,
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person,
person_block,
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person_mention,
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post,
},
utils::{get_conn, limit_and_offset, DbConn, DbPool, ListFn, Queries, ReadFn},
CommentSortType,
};
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fn queries<'a>() -> Queries<
impl ReadFn<'a, PersonMentionView, (PersonMentionId, Option<PersonId>)>,
impl ListFn<'a, PersonMentionView, PersonMentionQuery>,
> {
let is_creator_banned_from_community = exists(
community_person_ban::table.filter(
community::id
.eq(community_person_ban::community_id)
.and(community_person_ban::person_id.eq(comment::creator_id)),
),
);
let is_local_user_banned_from_community = |person_id| {
exists(
community_person_ban::table.filter(
community::id
.eq(community_person_ban::community_id)
.and(community_person_ban::person_id.eq(person_id)),
),
)
};
let is_saved = |person_id| {
exists(
comment_saved::table.filter(
comment::id
.eq(comment_saved::comment_id)
.and(comment_saved::person_id.eq(person_id)),
),
)
};
let is_community_followed = |person_id| {
community_follower::table
.filter(
post::community_id
.eq(community_follower::community_id)
.and(community_follower::person_id.eq(person_id)),
)
.select(community_follower::pending.nullable())
.single_value()
};
let is_creator_blocked = |person_id| {
exists(
person_block::table.filter(
comment::creator_id
.eq(person_block::target_id)
.and(person_block::person_id.eq(person_id)),
),
)
};
let score = |person_id| {
comment_like::table
.filter(
comment::id
.eq(comment_like::comment_id)
.and(comment_like::person_id.eq(person_id)),
)
.select(comment_like::score.nullable())
.single_value()
};
let creator_is_moderator = exists(
community_moderator::table.filter(
community::id
.eq(community_moderator::community_id)
.and(community_moderator::person_id.eq(comment::creator_id)),
),
);
let creator_is_admin = exists(
local_user::table.filter(
comment::creator_id
.eq(local_user::person_id)
.and(local_user::admin.eq(true)),
),
);
let all_joins = move |query: person_mention::BoxedQuery<'a, Pg>,
my_person_id: Option<PersonId>| {
let is_local_user_banned_from_community_selection: Box<
dyn BoxableExpression<_, Pg, SqlType = sql_types::Bool>,
> = if let Some(person_id) = my_person_id {
Box::new(is_local_user_banned_from_community(person_id))
} else {
Box::new(false.into_sql::<sql_types::Bool>())
};
let score_selection: Box<
dyn BoxableExpression<_, Pg, SqlType = sql_types::Nullable<sql_types::SmallInt>>,
> = if let Some(person_id) = my_person_id {
Box::new(score(person_id))
} else {
Box::new(None::<i16>.into_sql::<sql_types::Nullable<sql_types::SmallInt>>())
};
let subscribed_type_selection: Box<
dyn BoxableExpression<_, Pg, SqlType = sql_types::Nullable<sql_types::Bool>>,
> = if let Some(person_id) = my_person_id {
Box::new(is_community_followed(person_id))
} else {
Box::new(None::<bool>.into_sql::<sql_types::Nullable<sql_types::Bool>>())
};
let is_saved_selection: Box<dyn BoxableExpression<_, Pg, SqlType = sql_types::Bool>> =
if let Some(person_id) = my_person_id {
Box::new(is_saved(person_id))
} else {
Box::new(false.into_sql::<sql_types::Bool>())
};
let is_creator_blocked_selection: Box<dyn BoxableExpression<_, Pg, SqlType = sql_types::Bool>> =
if let Some(person_id) = my_person_id {
Box::new(is_creator_blocked(person_id))
} else {
Box::new(false.into_sql::<sql_types::Bool>())
};
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query
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.inner_join(comment::table)
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.inner_join(person::table.on(comment::creator_id.eq(person::id)))
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.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)
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.inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
.select((
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,
is_creator_banned_from_community,
is_local_user_banned_from_community_selection,
creator_is_moderator,
creator_is_admin,
subscribed_type_selection,
is_saved_selection,
is_creator_blocked_selection,
score_selection,
))
};
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,
)
.first::<PersonMentionView>(&mut conn)
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.await
};
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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);
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if let Some(recipient_id) = options.recipient_id {
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query = query.filter(person_mention::recipient_id.eq(recipient_id));
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}
if options.unread_only {
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query = query.filter(person_mention::read.eq(false));
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}
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()),
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};
let (limit, offset) = limit_and_offset(options.page, options.limit)?;
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query
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.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?;
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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
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}
}