crates/db_views_actor/src/person_mention_view.rs

   1 use crate::structs::PersonMentionView;
   2 use diesel::{
   3   dsl::now,
   4   result::Error,
   5   BoolExpressionMethods,
   6   ExpressionMethods,
   7   JoinOnDsl,
   8   NullableExpressionMethods,
   9   QueryDsl,
  10 };
  11 use diesel_async::RunQueryDsl;
  12 use lemmy_db_schema::{
  13   aggregates::structs::CommentAggregates,
  14   newtypes::{PersonId, PersonMentionId},
  15   schema::{
  16     comment,
  17     comment_aggregates,
  18     comment_like,
  19     comment_saved,
  20     community,
  21     community_follower,
  22     community_person_ban,
  23     person,
  24     person_block,
  25     person_mention,
  26     post,
  27   },
  28   source::{
  29     comment::{Comment, CommentSaved},
  30     community::{Community, CommunityFollower, CommunityPersonBan},
  31     person::Person,
  32     person_block::PersonBlock,
  33     person_mention::PersonMention,
  34     post::Post,
  35   },
  36   traits::JoinView,
  37   utils::{functions::hot_rank, get_conn, limit_and_offset, DbPool},
  38   CommentSortType,
  39 };
  40 use typed_builder::TypedBuilder;
  41
  42 type PersonMentionViewTuple = (
  43   PersonMention,
  44   Comment,
  45   Person,
  46   Post,
  47   Community,
  48   Person,
  49   CommentAggregates,
  50   Option<CommunityPersonBan>,
  51   Option<CommunityFollower>,
  52   Option<CommentSaved>,
  53   Option<PersonBlock>,
  54   Option<i16>,
  55 );
  56
  57 impl PersonMentionView {
  58   pub async fn read(
  59     pool: &DbPool,
  60     person_mention_id: PersonMentionId,
  61     my_person_id: Option<PersonId>,
  62   ) -> Result<Self, Error> {
  63     let conn = &mut get_conn(pool).await?;
  64     let person_alias_1 = diesel::alias!(person as person1);
  65
  66     // The left join below will return None in this case
  67     let person_id_join = my_person_id.unwrap_or(PersonId(-1));
  68
  69     let (
  70       person_mention,
  71       comment,
  72       creator,
  73       post,
  74       community,
  75       recipient,
  76       counts,
  77       creator_banned_from_community,
  78       follower,
  79       saved,
  80       creator_blocked,
  81       my_vote,
  82     ) = person_mention::table
  83       .find(person_mention_id)
  84       .inner_join(comment::table)
  85       .inner_join(person::table.on(comment::creator_id.eq(person::id)))
  86       .inner_join(post::table.on(comment::post_id.eq(post::id)))
  87       .inner_join(community::table.on(post::community_id.eq(community::id)))
  88       .inner_join(person_alias_1)
  89       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
  90       .left_join(
  91         community_person_ban::table.on(
  92           community::id
  93             .eq(community_person_ban::community_id)
  94             .and(community_person_ban::person_id.eq(comment::creator_id))
  95             .and(
  96               community_person_ban::expires
  97                 .is_null()
  98                 .or(community_person_ban::expires.gt(now)),
  99             ),
 100         ),
 101       )
 102       .left_join(
 103         community_follower::table.on(
 104           post::community_id
 105             .eq(community_follower::community_id)
 106             .and(community_follower::person_id.eq(person_id_join)),
 107         ),
 108       )
 109       .left_join(
 110         comment_saved::table.on(
 111           comment::id
 112             .eq(comment_saved::comment_id)
 113             .and(comment_saved::person_id.eq(person_id_join)),
 114         ),
 115       )
 116       .left_join(
 117         person_block::table.on(
 118           comment::creator_id
 119             .eq(person_block::target_id)
 120             .and(person_block::person_id.eq(person_id_join)),
 121         ),
 122       )
 123       .left_join(
 124         comment_like::table.on(
 125           comment::id
 126             .eq(comment_like::comment_id)
 127             .and(comment_like::person_id.eq(person_id_join)),
 128         ),
 129       )
 130       .select((
 131         person_mention::all_columns,
 132         comment::all_columns,
 133         person::all_columns,
 134         post::all_columns,
 135         community::all_columns,
 136         person_alias_1.fields(person::all_columns),
 137         comment_aggregates::all_columns,
 138         community_person_ban::all_columns.nullable(),
 139         community_follower::all_columns.nullable(),
 140         comment_saved::all_columns.nullable(),
 141         person_block::all_columns.nullable(),
 142         comment_like::score.nullable(),
 143       ))
 144       .first::<PersonMentionViewTuple>(conn)
 145       .await?;
 146
 147     Ok(PersonMentionView {
 148       person_mention,
 149       comment,
 150       creator,
 151       post,
 152       community,
 153       recipient,
 154       counts,
 155       creator_banned_from_community: creator_banned_from_community.is_some(),
 156       subscribed: CommunityFollower::to_subscribed_type(&follower),
 157       saved: saved.is_some(),
 158       creator_blocked: creator_blocked.is_some(),
 159       my_vote,
 160     })
 161   }
 162
 163   /// Gets the number of unread mentions
 164   pub async fn get_unread_mentions(pool: &DbPool, my_person_id: PersonId) -> Result<i64, Error> {
 165     use diesel::dsl::count;
 166     let conn = &mut get_conn(pool).await?;
 167
 168     person_mention::table
 169       .inner_join(comment::table)
 170       .filter(person_mention::recipient_id.eq(my_person_id))
 171       .filter(person_mention::read.eq(false))
 172       .filter(comment::deleted.eq(false))
 173       .filter(comment::removed.eq(false))
 174       .select(count(person_mention::id))
 175       .first::<i64>(conn)
 176       .await
 177   }
 178 }
 179
 180 #[derive(TypedBuilder)]
 181 #[builder(field_defaults(default))]
 182 pub struct PersonMentionQuery<'a> {
 183   #[builder(!default)]
 184   pool: &'a DbPool,
 185   my_person_id: Option<PersonId>,
 186   recipient_id: Option<PersonId>,
 187   sort: Option<CommentSortType>,
 188   unread_only: Option<bool>,
 189   show_bot_accounts: Option<bool>,
 190   page: Option<i64>,
 191   limit: Option<i64>,
 192 }
 193
 194 impl<'a> PersonMentionQuery<'a> {
 195   pub async fn list(self) -> Result<Vec<PersonMentionView>, Error> {
 196     let conn = &mut get_conn(self.pool).await?;
 197
 198     let person_alias_1 = diesel::alias!(person as person1);
 199
 200     // The left join below will return None in this case
 201     let person_id_join = self.my_person_id.unwrap_or(PersonId(-1));
 202
 203     let mut query = person_mention::table
 204       .inner_join(comment::table)
 205       .inner_join(person::table.on(comment::creator_id.eq(person::id)))
 206       .inner_join(post::table.on(comment::post_id.eq(post::id)))
 207       .inner_join(community::table.on(post::community_id.eq(community::id)))
 208       .inner_join(person_alias_1)
 209       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
 210       .left_join(
 211         community_person_ban::table.on(
 212           community::id
 213             .eq(community_person_ban::community_id)
 214             .and(community_person_ban::person_id.eq(comment::creator_id))
 215             .and(
 216               community_person_ban::expires
 217                 .is_null()
 218                 .or(community_person_ban::expires.gt(now)),
 219             ),
 220         ),
 221       )
 222       .left_join(
 223         community_follower::table.on(
 224           post::community_id
 225             .eq(community_follower::community_id)
 226             .and(community_follower::person_id.eq(person_id_join)),
 227         ),
 228       )
 229       .left_join(
 230         comment_saved::table.on(
 231           comment::id
 232             .eq(comment_saved::comment_id)
 233             .and(comment_saved::person_id.eq(person_id_join)),
 234         ),
 235       )
 236       .left_join(
 237         person_block::table.on(
 238           comment::creator_id
 239             .eq(person_block::target_id)
 240             .and(person_block::person_id.eq(person_id_join)),
 241         ),
 242       )
 243       .left_join(
 244         comment_like::table.on(
 245           comment::id
 246             .eq(comment_like::comment_id)
 247             .and(comment_like::person_id.eq(person_id_join)),
 248         ),
 249       )
 250       .select((
 251         person_mention::all_columns,
 252         comment::all_columns,
 253         person::all_columns,
 254         post::all_columns,
 255         community::all_columns,
 256         person_alias_1.fields(person::all_columns),
 257         comment_aggregates::all_columns,
 258         community_person_ban::all_columns.nullable(),
 259         community_follower::all_columns.nullable(),
 260         comment_saved::all_columns.nullable(),
 261         person_block::all_columns.nullable(),
 262         comment_like::score.nullable(),
 263       ))
 264       .into_boxed();
 265
 266     if let Some(recipient_id) = self.recipient_id {
 267       query = query.filter(person_mention::recipient_id.eq(recipient_id));
 268     }
 269
 270     if self.unread_only.unwrap_or(false) {
 271       query = query.filter(person_mention::read.eq(false));
 272     }
 273
 274     if !self.show_bot_accounts.unwrap_or(true) {
 275       query = query.filter(person::bot_account.eq(false));
 276     };
 277
 278     query = match self.sort.unwrap_or(CommentSortType::Hot) {
 279       CommentSortType::Hot => query
 280         .then_order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
 281         .then_order_by(comment_aggregates::published.desc()),
 282       CommentSortType::New => query.then_order_by(comment::published.desc()),
 283       CommentSortType::Old => query.then_order_by(comment::published.asc()),
 284       CommentSortType::Top => query.order_by(comment_aggregates::score.desc()),
 285     };
 286
 287     let (limit, offset) = limit_and_offset(self.page, self.limit)?;
 288
 289     let res = query
 290       .limit(limit)
 291       .offset(offset)
 292       .load::<PersonMentionViewTuple>(conn)
 293       .await?;
 294
 295     Ok(res.into_iter().map(PersonMentionView::from_tuple).collect())
 296   }
 297 }
 298
 299 impl JoinView for PersonMentionView {
 300   type JoinTuple = PersonMentionViewTuple;
 301   fn from_tuple(a: Self::JoinTuple) -> Self {
 302     Self {
 303       person_mention: a.0,
 304       comment: a.1,
 305       creator: a.2,
 306       post: a.3,
 307       community: a.4,
 308       recipient: a.5,
 309       counts: a.6,
 310       creator_banned_from_community: a.7.is_some(),
 311       subscribed: CommunityFollower::to_subscribed_type(&a.8),
 312       saved: a.9.is_some(),
 313       creator_blocked: a.10.is_some(),
 314       my_vote: a.11,
 315     }
 316   }
 317 }