lemmy/crates/db_views_actor/src/person_mention_view.rs

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Rust
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use crate::structs::PersonMentionView;
use diesel::{dsl::*, result::Error, *};
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use lemmy_db_schema::{
aggregates::structs::CommentAggregates,
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newtypes::{PersonId, PersonMentionId},
schema::{
comment,
comment_aggregates,
comment_like,
comment_saved,
community,
community_follower,
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community_person_ban,
person,
person_block,
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person_mention,
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post,
},
source::{
comment::{Comment, CommentSaved},
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community::{Community, CommunityFollower, CommunityPersonBan, CommunitySafe},
person::{Person, PersonSafe},
person_block::PersonBlock,
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person_mention::PersonMention,
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post::Post,
},
traits::{ToSafe, ViewToVec},
utils::{functions::hot_rank, limit_and_offset},
CommentSortType,
};
use typed_builder::TypedBuilder;
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type PersonMentionViewTuple = (
PersonMention,
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Comment,
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PersonSafe,
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Post,
CommunitySafe,
PersonSafe,
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CommentAggregates,
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Option<CommunityPersonBan>,
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Option<CommunityFollower>,
Option<CommentSaved>,
Option<PersonBlock>,
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Option<i16>,
);
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impl PersonMentionView {
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pub fn read(
conn: &mut PgConnection,
person_mention_id: PersonMentionId,
my_person_id: Option<PersonId>,
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) -> Result<Self, Error> {
let person_alias_1 = diesel::alias!(person as person1);
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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 (
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person_mention,
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comment,
creator,
post,
community,
recipient,
counts,
creator_banned_from_community,
follower,
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saved,
creator_blocked,
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my_vote,
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) = person_mention::table
.find(person_mention_id)
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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(person_alias_1)
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.inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
.left_join(
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community_person_ban::table.on(
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community::id
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.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)),
),
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),
)
.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(
comment_saved::table.on(
comment::id
.eq(comment_saved::comment_id)
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.and(comment_saved::person_id.eq(person_id_join)),
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),
)
.left_join(
person_block::table.on(
comment::creator_id
.eq(person_block::target_id)
.and(person_block::person_id.eq(person_id_join)),
),
)
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.left_join(
comment_like::table.on(
comment::id
.eq(comment_like::comment_id)
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.and(comment_like::person_id.eq(person_id_join)),
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),
)
.select((
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person_mention::all_columns,
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comment::all_columns,
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Person::safe_columns_tuple(),
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post::all_columns,
Community::safe_columns_tuple(),
person_alias_1.fields(Person::safe_columns_tuple()),
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comment_aggregates::all_columns,
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community_person_ban::all_columns.nullable(),
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community_follower::all_columns.nullable(),
comment_saved::all_columns.nullable(),
person_block::all_columns.nullable(),
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comment_like::score.nullable(),
))
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.first::<PersonMentionViewTuple>(conn)?;
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Ok(PersonMentionView {
person_mention,
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comment,
creator,
post,
community,
recipient,
counts,
creator_banned_from_community: creator_banned_from_community.is_some(),
subscribed: CommunityFollower::to_subscribed_type(&follower),
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saved: saved.is_some(),
creator_blocked: creator_blocked.is_some(),
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my_vote,
})
}
/// Gets the number of unread mentions
pub fn get_unread_mentions(
conn: &mut PgConnection,
my_person_id: PersonId,
) -> Result<i64, Error> {
use diesel::dsl::*;
person_mention::table
.filter(person_mention::recipient_id.eq(my_person_id))
.filter(person_mention::read.eq(false))
.select(count(person_mention::id))
.first::<i64>(conn)
}
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}
#[derive(TypedBuilder)]
#[builder(field_defaults(default))]
pub struct PersonMentionQuery<'a> {
#[builder(!default)]
conn: &'a mut PgConnection,
my_person_id: Option<PersonId>,
recipient_id: Option<PersonId>,
sort: Option<CommentSortType>,
unread_only: Option<bool>,
show_bot_accounts: Option<bool>,
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page: Option<i64>,
limit: Option<i64>,
}
impl<'a> PersonMentionQuery<'a> {
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pub fn list(self) -> Result<Vec<PersonMentionView>, Error> {
use diesel::dsl::*;
let person_alias_1 = diesel::alias!(person as person1);
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// The left join below will return None in this case
let person_id_join = self.my_person_id.unwrap_or(PersonId(-1));
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let mut query = person_mention::table
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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(person_alias_1)
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.inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
.left_join(
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community_person_ban::table.on(
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community::id
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.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)),
),
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),
)
.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(
comment_saved::table.on(
comment::id
.eq(comment_saved::comment_id)
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.and(comment_saved::person_id.eq(person_id_join)),
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),
)
.left_join(
person_block::table.on(
comment::creator_id
.eq(person_block::target_id)
.and(person_block::person_id.eq(person_id_join)),
),
)
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.left_join(
comment_like::table.on(
comment::id
.eq(comment_like::comment_id)
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.and(comment_like::person_id.eq(person_id_join)),
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),
)
.select((
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person_mention::all_columns,
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comment::all_columns,
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Person::safe_columns_tuple(),
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post::all_columns,
Community::safe_columns_tuple(),
person_alias_1.fields(Person::safe_columns_tuple()),
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comment_aggregates::all_columns,
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community_person_ban::all_columns.nullable(),
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community_follower::all_columns.nullable(),
comment_saved::all_columns.nullable(),
person_block::all_columns.nullable(),
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comment_like::score.nullable(),
))
.into_boxed();
if let Some(recipient_id) = self.recipient_id {
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query = query.filter(person_mention::recipient_id.eq(recipient_id));
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}
if self.unread_only.unwrap_or(false) {
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query = query.filter(person_mention::read.eq(false));
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}
if !self.show_bot_accounts.unwrap_or(true) {
query = query.filter(person::bot_account.eq(false));
};
query = match self.sort.unwrap_or(CommentSortType::Hot) {
CommentSortType::Hot => query
.then_order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
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.then_order_by(comment_aggregates::published.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(self.page, self.limit)?;
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let res = query
.limit(limit)
.offset(offset)
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.load::<PersonMentionViewTuple>(self.conn)?;
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Ok(PersonMentionView::from_tuple_to_vec(res))
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}
}
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impl ViewToVec for PersonMentionView {
type DbTuple = PersonMentionViewTuple;
fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
items
.into_iter()
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.map(|a| Self {
person_mention: a.0,
comment: a.1,
creator: a.2,
post: a.3,
community: a.4,
recipient: a.5,
counts: a.6,
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creator_banned_from_community: a.7.is_some(),
subscribed: CommunityFollower::to_subscribed_type(&a.8),
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saved: a.9.is_some(),
creator_blocked: a.10.is_some(),
my_vote: a.11,
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})
.collect::<Vec<Self>>()
}
}