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::{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         ),
  96       )
  97       .left_join(
  98         community_follower::table.on(
  99           post::community_id
 100             .eq(community_follower::community_id)
 101             .and(community_follower::person_id.eq(person_id_join)),
 102         ),
 103       )
 104       .left_join(
 105         comment_saved::table.on(
 106           comment::id
 107             .eq(comment_saved::comment_id)
 108             .and(comment_saved::person_id.eq(person_id_join)),
 109         ),
 110       )
 111       .left_join(
 112         person_block::table.on(
 113           comment::creator_id
 114             .eq(person_block::target_id)
 115             .and(person_block::person_id.eq(person_id_join)),
 116         ),
 117       )
 118       .left_join(
 119         comment_like::table.on(
 120           comment::id
 121             .eq(comment_like::comment_id)
 122             .and(comment_like::person_id.eq(person_id_join)),
 123         ),
 124       )
 125       .select((
 126         person_mention::all_columns,
 127         comment::all_columns,
 128         person::all_columns,
 129         post::all_columns,
 130         community::all_columns,
 131         person_alias_1.fields(person::all_columns),
 132         comment_aggregates::all_columns,
 133         community_person_ban::all_columns.nullable(),
 134         community_follower::all_columns.nullable(),
 135         comment_saved::all_columns.nullable(),
 136         person_block::all_columns.nullable(),
 137         comment_like::score.nullable(),
 138       ))
 139       .first::<PersonMentionViewTuple>(conn)
 140       .await?;
 141
 142     Ok(PersonMentionView {
 143       person_mention,
 144       comment,
 145       creator,
 146       post,
 147       community,
 148       recipient,
 149       counts,
 150       creator_banned_from_community: creator_banned_from_community.is_some(),
 151       subscribed: CommunityFollower::to_subscribed_type(&follower),
 152       saved: saved.is_some(),
 153       creator_blocked: creator_blocked.is_some(),
 154       my_vote,
 155     })
 156   }
 157
 158   /// Gets the number of unread mentions
 159   pub async fn get_unread_mentions(pool: &DbPool, my_person_id: PersonId) -> Result<i64, Error> {
 160     use diesel::dsl::count;
 161     let conn = &mut get_conn(pool).await?;
 162
 163     person_mention::table
 164       .inner_join(comment::table)
 165       .filter(person_mention::recipient_id.eq(my_person_id))
 166       .filter(person_mention::read.eq(false))
 167       .filter(comment::deleted.eq(false))
 168       .filter(comment::removed.eq(false))
 169       .select(count(person_mention::id))
 170       .first::<i64>(conn)
 171       .await
 172   }
 173 }
 174
 175 #[derive(TypedBuilder)]
 176 #[builder(field_defaults(default))]
 177 pub struct PersonMentionQuery<'a> {
 178   #[builder(!default)]
 179   pool: &'a DbPool,
 180   my_person_id: Option<PersonId>,
 181   recipient_id: Option<PersonId>,
 182   sort: Option<CommentSortType>,
 183   unread_only: Option<bool>,
 184   show_bot_accounts: Option<bool>,
 185   page: Option<i64>,
 186   limit: Option<i64>,
 187 }
 188
 189 impl<'a> PersonMentionQuery<'a> {
 190   pub async fn list(self) -> Result<Vec<PersonMentionView>, Error> {
 191     let conn = &mut get_conn(self.pool).await?;
 192
 193     let person_alias_1 = diesel::alias!(person as person1);
 194
 195     // The left join below will return None in this case
 196     let person_id_join = self.my_person_id.unwrap_or(PersonId(-1));
 197
 198     let mut query = person_mention::table
 199       .inner_join(comment::table)
 200       .inner_join(person::table.on(comment::creator_id.eq(person::id)))
 201       .inner_join(post::table.on(comment::post_id.eq(post::id)))
 202       .inner_join(community::table.on(post::community_id.eq(community::id)))
 203       .inner_join(person_alias_1)
 204       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
 205       .left_join(
 206         community_person_ban::table.on(
 207           community::id
 208             .eq(community_person_ban::community_id)
 209             .and(community_person_ban::person_id.eq(comment::creator_id))
 210             .and(
 211               community_person_ban::expires
 212                 .is_null()
 213                 .or(community_person_ban::expires.gt(now)),
 214             ),
 215         ),
 216       )
 217       .left_join(
 218         community_follower::table.on(
 219           post::community_id
 220             .eq(community_follower::community_id)
 221             .and(community_follower::person_id.eq(person_id_join)),
 222         ),
 223       )
 224       .left_join(
 225         comment_saved::table.on(
 226           comment::id
 227             .eq(comment_saved::comment_id)
 228             .and(comment_saved::person_id.eq(person_id_join)),
 229         ),
 230       )
 231       .left_join(
 232         person_block::table.on(
 233           comment::creator_id
 234             .eq(person_block::target_id)
 235             .and(person_block::person_id.eq(person_id_join)),
 236         ),
 237       )
 238       .left_join(
 239         comment_like::table.on(
 240           comment::id
 241             .eq(comment_like::comment_id)
 242             .and(comment_like::person_id.eq(person_id_join)),
 243         ),
 244       )
 245       .select((
 246         person_mention::all_columns,
 247         comment::all_columns,
 248         person::all_columns,
 249         post::all_columns,
 250         community::all_columns,
 251         person_alias_1.fields(person::all_columns),
 252         comment_aggregates::all_columns,
 253         community_person_ban::all_columns.nullable(),
 254         community_follower::all_columns.nullable(),
 255         comment_saved::all_columns.nullable(),
 256         person_block::all_columns.nullable(),
 257         comment_like::score.nullable(),
 258       ))
 259       .into_boxed();
 260
 261     if let Some(recipient_id) = self.recipient_id {
 262       query = query.filter(person_mention::recipient_id.eq(recipient_id));
 263     }
 264
 265     if self.unread_only.unwrap_or(false) {
 266       query = query.filter(person_mention::read.eq(false));
 267     }
 268
 269     if !self.show_bot_accounts.unwrap_or(true) {
 270       query = query.filter(person::bot_account.eq(false));
 271     };
 272
 273     query = match self.sort.unwrap_or(CommentSortType::Hot) {
 274       CommentSortType::Hot => query.then_order_by(comment_aggregates::hot_rank.desc()),
 275       CommentSortType::New => query.then_order_by(comment::published.desc()),
 276       CommentSortType::Old => query.then_order_by(comment::published.asc()),
 277       CommentSortType::Top => query.order_by(comment_aggregates::score.desc()),
 278     };
 279
 280     let (limit, offset) = limit_and_offset(self.page, self.limit)?;
 281
 282     let res = query
 283       .limit(limit)
 284       .offset(offset)
 285       .load::<PersonMentionViewTuple>(conn)
 286       .await?;
 287
 288     Ok(res.into_iter().map(PersonMentionView::from_tuple).collect())
 289   }
 290 }
 291
 292 impl JoinView for PersonMentionView {
 293   type JoinTuple = PersonMentionViewTuple;
 294   fn from_tuple(a: Self::JoinTuple) -> Self {
 295     Self {
 296       person_mention: a.0,
 297       comment: a.1,
 298       creator: a.2,
 299       post: a.3,
 300       community: a.4,
 301       recipient: a.5,
 302       counts: a.6,
 303       creator_banned_from_community: a.7.is_some(),
 304       subscribed: CommunityFollower::to_subscribed_type(&a.8),
 305       saved: a.9.is_some(),
 306       creator_blocked: a.10.is_some(),
 307       my_vote: a.11,
 308     }
 309   }
 310 }