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use diesel::{result::Error, *};
use lemmy_db_queries::{
aggregates::comment_aggregates::CommentAggregates,
functions::hot_rank,
limit_and_offset,
MaybeOptional,
SortType,
ToSafe,
ViewToVec,
};
use lemmy_db_schema::{
schema::{
comment,
comment_aggregates,
comment_like,
comment_saved,
community,
community_follower,
community_user_ban,
post,
user_,
user_alias_1,
user_mention,
},
source::{
comment::{Comment, CommentSaved},
community::{Community, CommunityFollower, CommunitySafe, CommunityUserBan},
post::Post,
user::{UserAlias1, UserSafe, UserSafeAlias1, User_},
user_mention::UserMention,
},
};
use serde::Serialize;
#[derive(Debug, PartialEq, Serialize, Clone)]
pub struct UserMentionView {
pub user_mention: UserMention,
pub comment: Comment,
pub creator: UserSafe,
pub post: Post,
pub community: CommunitySafe,
pub recipient: UserSafeAlias1,
pub counts: CommentAggregates,
pub creator_banned_from_community: bool, // Left Join to CommunityUserBan
pub subscribed: bool, // Left join to CommunityFollower
pub saved: bool, // Left join to CommentSaved
pub my_vote: Option<i16>, // Left join to CommentLike
}
type UserMentionViewTuple = (
UserMention,
Comment,
UserSafe,
Post,
CommunitySafe,
UserSafeAlias1,
CommentAggregates,
Option<CommunityUserBan>,
Option<CommunityFollower>,
Option<CommentSaved>,
Option<i16>,
);
impl UserMentionView {
pub fn read(
conn: &PgConnection,
user_mention_id: i32,
my_user_id: Option<i32>,
) -> Result<Self, Error> {
// The left join below will return None in this case
let user_id_join = my_user_id.unwrap_or(-1);
let (
user_mention,
comment,
creator,
post,
community,
recipient,
counts,
creator_banned_from_community,
subscribed,
saved,
my_vote,
) = user_mention::table
.find(user_mention_id)
.inner_join(comment::table)
.inner_join(user_::table.on(comment::creator_id.eq(user_::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(user_alias_1::table)
.inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
.left_join(
community_user_ban::table.on(
community::id
.eq(community_user_ban::community_id)
.and(community_user_ban::user_id.eq(comment::creator_id)),
),
)
.left_join(
community_follower::table.on(
post::community_id
.eq(community_follower::community_id)
.and(community_follower::user_id.eq(user_id_join)),
),
)
.left_join(
comment_saved::table.on(
comment::id
.eq(comment_saved::comment_id)
.and(comment_saved::user_id.eq(user_id_join)),
),
)
.left_join(
comment_like::table.on(
comment::id
.eq(comment_like::comment_id)
.and(comment_like::user_id.eq(user_id_join)),
),
)
.select((
user_mention::all_columns,
comment::all_columns,
User_::safe_columns_tuple(),
post::all_columns,
Community::safe_columns_tuple(),
UserAlias1::safe_columns_tuple(),
comment_aggregates::all_columns,
community_user_ban::all_columns.nullable(),
community_follower::all_columns.nullable(),
comment_saved::all_columns.nullable(),
comment_like::score.nullable(),
))
.first::<UserMentionViewTuple>(conn)?;
Ok(UserMentionView {
user_mention,
comment,
creator,
post,
community,
recipient,
counts,
creator_banned_from_community: creator_banned_from_community.is_some(),
subscribed: subscribed.is_some(),
saved: saved.is_some(),
my_vote,
})
}
}
pub struct UserMentionQueryBuilder<'a> {
conn: &'a PgConnection,
my_user_id: Option<i32>,
recipient_id: Option<i32>,
sort: &'a SortType,
unread_only: bool,
page: Option<i64>,
limit: Option<i64>,
}
impl<'a> UserMentionQueryBuilder<'a> {
pub fn create(conn: &'a PgConnection) -> Self {
UserMentionQueryBuilder {
conn,
my_user_id: None,
recipient_id: None,
sort: &SortType::New,
unread_only: false,
page: None,
limit: None,
}
}
pub fn sort(mut self, sort: &'a SortType) -> Self {
self.sort = sort;
self
}
pub fn unread_only(mut self, unread_only: bool) -> Self {
self.unread_only = unread_only;
self
}
pub fn recipient_id<T: MaybeOptional<i32>>(mut self, recipient_id: T) -> Self {
self.recipient_id = recipient_id.get_optional();
self
}
pub fn my_user_id<T: MaybeOptional<i32>>(mut self, my_user_id: T) -> Self {
self.my_user_id = my_user_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
}
pub fn list(self) -> Result<Vec<UserMentionView>, Error> {
use diesel::dsl::*;
// The left join below will return None in this case
let user_id_join = self.my_user_id.unwrap_or(-1);
let mut query = user_mention::table
.inner_join(comment::table)
.inner_join(user_::table.on(comment::creator_id.eq(user_::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(user_alias_1::table)
.inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
.left_join(
community_user_ban::table.on(
community::id
.eq(community_user_ban::community_id)
.and(community_user_ban::user_id.eq(comment::creator_id)),
),
)
.left_join(
community_follower::table.on(
post::community_id
.eq(community_follower::community_id)
.and(community_follower::user_id.eq(user_id_join)),
),
)
.left_join(
comment_saved::table.on(
comment::id
.eq(comment_saved::comment_id)
.and(comment_saved::user_id.eq(user_id_join)),
),
)
.left_join(
comment_like::table.on(
comment::id
.eq(comment_like::comment_id)
.and(comment_like::user_id.eq(user_id_join)),
),
)
.select((
user_mention::all_columns,
comment::all_columns,
User_::safe_columns_tuple(),
post::all_columns,
Community::safe_columns_tuple(),
UserAlias1::safe_columns_tuple(),
comment_aggregates::all_columns,
community_user_ban::all_columns.nullable(),
community_follower::all_columns.nullable(),
comment_saved::all_columns.nullable(),
comment_like::score.nullable(),
))
.into_boxed();
if let Some(recipient_id) = self.recipient_id {
query = query.filter(user_mention::recipient_id.eq(recipient_id));
}
if self.unread_only {
query = query.filter(user_mention::read.eq(false));
}
query = match self.sort {
SortType::Hot | SortType::Active => query
.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())
}
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)
.load::<UserMentionViewTuple>(self.conn)?;
Ok(UserMentionView::from_tuple_to_vec(res))
}
}
impl ViewToVec for UserMentionView {
type DbTuple = UserMentionViewTuple;
fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
items
.iter()
.map(|a| Self {
user_mention: a.0.to_owned(),
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(),
my_vote: a.10,
})
.collect::<Vec<Self>>()
}
}