lemmy/crates/db_views_actor/src/person_mention_view.rs

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Rust
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use diesel::{result::Error, *};
use lemmy_db_queries::{
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aggregates::comment_aggregates::CommentAggregates,
functions::hot_rank,
limit_and_offset,
MaybeOptional,
SortType,
ToSafe,
ViewToVec,
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};
use lemmy_db_schema::{
schema::{
comment,
comment_aggregates,
comment_like,
comment_saved,
community,
community_follower,
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community_person_ban,
person,
person_alias_1,
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, PersonAlias1, PersonSafe, PersonSafeAlias1},
person_block::PersonBlock,
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person_mention::PersonMention,
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post::Post,
},
PersonId,
PersonMentionId,
};
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use serde::Serialize;
#[derive(Debug, PartialEq, Serialize, Clone)]
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pub struct PersonMentionView {
pub person_mention: PersonMention,
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pub comment: Comment,
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pub creator: PersonSafe,
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pub post: Post,
pub community: CommunitySafe,
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pub recipient: PersonSafeAlias1,
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pub counts: CommentAggregates,
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pub creator_banned_from_community: bool, // Left Join to CommunityPersonBan
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pub subscribed: bool, // Left join to CommunityFollower
pub saved: bool, // Left join to CommentSaved
pub creator_blocked: bool, // Left join to PersonBlock
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pub my_vote: Option<i16>, // Left join to CommentLike
}
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type PersonMentionViewTuple = (
PersonMention,
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Comment,
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PersonSafe,
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Post,
CommunitySafe,
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PersonSafeAlias1,
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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: &PgConnection,
person_mention_id: PersonMentionId,
my_person_id: Option<PersonId>,
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) -> Result<Self, Error> {
// 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,
subscribed,
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)))
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.inner_join(person_alias_1::table)
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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)),
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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(),
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PersonAlias1::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: subscribed.is_some(),
saved: saved.is_some(),
creator_blocked: creator_blocked.is_some(),
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my_vote,
})
}
}
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pub struct PersonMentionQueryBuilder<'a> {
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conn: &'a PgConnection,
my_person_id: Option<PersonId>,
recipient_id: Option<PersonId>,
sort: Option<SortType>,
unread_only: Option<bool>,
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page: Option<i64>,
limit: Option<i64>,
}
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impl<'a> PersonMentionQueryBuilder<'a> {
pub fn create(conn: &'a PgConnection) -> Self {
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PersonMentionQueryBuilder {
conn,
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my_person_id: None,
recipient_id: None,
sort: None,
unread_only: None,
page: None,
limit: None,
}
}
pub fn sort<T: MaybeOptional<SortType>>(mut self, sort: T) -> Self {
self.sort = sort.get_optional();
self
}
pub fn unread_only<T: MaybeOptional<bool>>(mut self, unread_only: T) -> Self {
self.unread_only = unread_only.get_optional();
self
}
pub fn recipient_id<T: MaybeOptional<PersonId>>(mut self, recipient_id: T) -> Self {
self.recipient_id = recipient_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();
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
}
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pub fn list(self) -> Result<Vec<PersonMentionView>, Error> {
use diesel::dsl::*;
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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)))
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.inner_join(person_alias_1::table)
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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)),
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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(),
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PersonAlias1::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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}
query = match self.sort.unwrap_or(SortType::Hot) {
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SortType::Hot | SortType::Active => query
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.order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
.then_order_by(comment_aggregates::published.desc()),
SortType::New | SortType::MostComments | SortType::NewComments => {
query.order_by(comment::published.desc())
}
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SortType::TopAll => query.order_by(comment_aggregates::score.desc()),
SortType::TopYear => query
.filter(comment::published.gt(now - 1.years()))
.order_by(comment_aggregates::score.desc()),
SortType::TopMonth => query
.filter(comment::published.gt(now - 1.months()))
.order_by(comment_aggregates::score.desc()),
SortType::TopWeek => query
.filter(comment::published.gt(now - 1.weeks()))
.order_by(comment_aggregates::score.desc()),
SortType::TopDay => query
.filter(comment::published.gt(now - 1.days()))
.order_by(comment_aggregates::score.desc()),
};
let (limit, offset) = limit_and_offset(self.page, self.limit);
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
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.iter()
.map(|a| Self {
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person_mention: a.0.to_owned(),
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comment: a.1.to_owned(),
creator: a.2.to_owned(),
post: a.3.to_owned(),
community: a.4.to_owned(),
recipient: a.5.to_owned(),
counts: a.6.to_owned(),
creator_banned_from_community: a.7.is_some(),
subscribed: a.8.is_some(),
saved: a.9.is_some(),
creator_blocked: a.10.is_some(),
my_vote: a.11,
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})
.collect::<Vec<Self>>()
}
}