crates/db_views_actor/src/person_mention_view.rs

   1 use diesel::{result::Error, *};
   2 use lemmy_db_queries::{
   3   aggregates::comment_aggregates::CommentAggregates,
   4   functions::hot_rank,
   5   limit_and_offset,
   6   MaybeOptional,
   7   SortType,
   8   ToSafe,
   9   ViewToVec,
  10 };
  11 use lemmy_db_schema::{
  12   schema::{
  13     comment,
  14     comment_aggregates,
  15     comment_like,
  16     comment_saved,
  17     community,
  18     community_follower,
  19     community_person_ban,
  20     person,
  21     person_alias_1,
  22     person_block,
  23     person_mention,
  24     post,
  25   },
  26   source::{
  27     comment::{Comment, CommentSaved},
  28     community::{Community, CommunityFollower, CommunityPersonBan, CommunitySafe},
  29     person::{Person, PersonAlias1, PersonSafe, PersonSafeAlias1},
  30     person_block::PersonBlock,
  31     person_mention::PersonMention,
  32     post::Post,
  33   },
  34   PersonId,
  35   PersonMentionId,
  36 };
  37 use serde::{Deserialize, Serialize};
  38
  39 #[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
  40 pub struct PersonMentionView {
  41   pub person_mention: PersonMention,
  42   pub comment: Comment,
  43   pub creator: PersonSafe,
  44   pub post: Post,
  45   pub community: CommunitySafe,
  46   pub recipient: PersonSafeAlias1,
  47   pub counts: CommentAggregates,
  48   pub creator_banned_from_community: bool, // Left Join to CommunityPersonBan
  49   pub subscribed: bool,                    // Left join to CommunityFollower
  50   pub saved: bool,                         // Left join to CommentSaved
  51   pub creator_blocked: bool,               // Left join to PersonBlock
  52   pub my_vote: Option<i16>,                // Left join to CommentLike
  53 }
  54
  55 type PersonMentionViewTuple = (
  56   PersonMention,
  57   Comment,
  58   PersonSafe,
  59   Post,
  60   CommunitySafe,
  61   PersonSafeAlias1,
  62   CommentAggregates,
  63   Option<CommunityPersonBan>,
  64   Option<CommunityFollower>,
  65   Option<CommentSaved>,
  66   Option<PersonBlock>,
  67   Option<i16>,
  68 );
  69
  70 impl PersonMentionView {
  71   pub fn read(
  72     conn: &PgConnection,
  73     person_mention_id: PersonMentionId,
  74     my_person_id: Option<PersonId>,
  75   ) -> Result<Self, Error> {
  76     // The left join below will return None in this case
  77     let person_id_join = my_person_id.unwrap_or(PersonId(-1));
  78
  79     let (
  80       person_mention,
  81       comment,
  82       creator,
  83       post,
  84       community,
  85       recipient,
  86       counts,
  87       creator_banned_from_community,
  88       subscribed,
  89       saved,
  90       creator_blocked,
  91       my_vote,
  92     ) = person_mention::table
  93       .find(person_mention_id)
  94       .inner_join(comment::table)
  95       .inner_join(person::table.on(comment::creator_id.eq(person::id)))
  96       .inner_join(post::table.on(comment::post_id.eq(post::id)))
  97       .inner_join(community::table.on(post::community_id.eq(community::id)))
  98       .inner_join(person_alias_1::table)
  99       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
 100       .left_join(
 101         community_person_ban::table.on(
 102           community::id
 103             .eq(community_person_ban::community_id)
 104             .and(community_person_ban::person_id.eq(comment::creator_id)),
 105         ),
 106       )
 107       .left_join(
 108         community_follower::table.on(
 109           post::community_id
 110             .eq(community_follower::community_id)
 111             .and(community_follower::person_id.eq(person_id_join)),
 112         ),
 113       )
 114       .left_join(
 115         comment_saved::table.on(
 116           comment::id
 117             .eq(comment_saved::comment_id)
 118             .and(comment_saved::person_id.eq(person_id_join)),
 119         ),
 120       )
 121       .left_join(
 122         person_block::table.on(
 123           comment::creator_id
 124             .eq(person_block::target_id)
 125             .and(person_block::person_id.eq(person_id_join)),
 126         ),
 127       )
 128       .left_join(
 129         comment_like::table.on(
 130           comment::id
 131             .eq(comment_like::comment_id)
 132             .and(comment_like::person_id.eq(person_id_join)),
 133         ),
 134       )
 135       .select((
 136         person_mention::all_columns,
 137         comment::all_columns,
 138         Person::safe_columns_tuple(),
 139         post::all_columns,
 140         Community::safe_columns_tuple(),
 141         PersonAlias1::safe_columns_tuple(),
 142         comment_aggregates::all_columns,
 143         community_person_ban::all_columns.nullable(),
 144         community_follower::all_columns.nullable(),
 145         comment_saved::all_columns.nullable(),
 146         person_block::all_columns.nullable(),
 147         comment_like::score.nullable(),
 148       ))
 149       .first::<PersonMentionViewTuple>(conn)?;
 150
 151     Ok(PersonMentionView {
 152       person_mention,
 153       comment,
 154       creator,
 155       post,
 156       community,
 157       recipient,
 158       counts,
 159       creator_banned_from_community: creator_banned_from_community.is_some(),
 160       subscribed: subscribed.is_some(),
 161       saved: saved.is_some(),
 162       creator_blocked: creator_blocked.is_some(),
 163       my_vote,
 164     })
 165   }
 166
 167   /// Gets the number of unread mentions
 168   pub fn get_unread_mentions(conn: &PgConnection, my_person_id: PersonId) -> Result<i64, Error> {
 169     use diesel::dsl::*;
 170
 171     person_mention::table
 172       .filter(person_mention::recipient_id.eq(my_person_id))
 173       .filter(person_mention::read.eq(false))
 174       .select(count(person_mention::id))
 175       .first::<i64>(conn)
 176   }
 177 }
 178
 179 pub struct PersonMentionQueryBuilder<'a> {
 180   conn: &'a PgConnection,
 181   my_person_id: Option<PersonId>,
 182   recipient_id: Option<PersonId>,
 183   sort: Option<SortType>,
 184   unread_only: Option<bool>,
 185   page: Option<i64>,
 186   limit: Option<i64>,
 187 }
 188
 189 impl<'a> PersonMentionQueryBuilder<'a> {
 190   pub fn create(conn: &'a PgConnection) -> Self {
 191     PersonMentionQueryBuilder {
 192       conn,
 193       my_person_id: None,
 194       recipient_id: None,
 195       sort: None,
 196       unread_only: None,
 197       page: None,
 198       limit: None,
 199     }
 200   }
 201
 202   pub fn sort<T: MaybeOptional<SortType>>(mut self, sort: T) -> Self {
 203     self.sort = sort.get_optional();
 204     self
 205   }
 206
 207   pub fn unread_only<T: MaybeOptional<bool>>(mut self, unread_only: T) -> Self {
 208     self.unread_only = unread_only.get_optional();
 209     self
 210   }
 211
 212   pub fn recipient_id<T: MaybeOptional<PersonId>>(mut self, recipient_id: T) -> Self {
 213     self.recipient_id = recipient_id.get_optional();
 214     self
 215   }
 216
 217   pub fn my_person_id<T: MaybeOptional<PersonId>>(mut self, my_person_id: T) -> Self {
 218     self.my_person_id = my_person_id.get_optional();
 219     self
 220   }
 221
 222   pub fn page<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
 223     self.page = page.get_optional();
 224     self
 225   }
 226
 227   pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
 228     self.limit = limit.get_optional();
 229     self
 230   }
 231
 232   pub fn list(self) -> Result<Vec<PersonMentionView>, Error> {
 233     use diesel::dsl::*;
 234
 235     // The left join below will return None in this case
 236     let person_id_join = self.my_person_id.unwrap_or(PersonId(-1));
 237
 238     let mut query = person_mention::table
 239       .inner_join(comment::table)
 240       .inner_join(person::table.on(comment::creator_id.eq(person::id)))
 241       .inner_join(post::table.on(comment::post_id.eq(post::id)))
 242       .inner_join(community::table.on(post::community_id.eq(community::id)))
 243       .inner_join(person_alias_1::table)
 244       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
 245       .left_join(
 246         community_person_ban::table.on(
 247           community::id
 248             .eq(community_person_ban::community_id)
 249             .and(community_person_ban::person_id.eq(comment::creator_id)),
 250         ),
 251       )
 252       .left_join(
 253         community_follower::table.on(
 254           post::community_id
 255             .eq(community_follower::community_id)
 256             .and(community_follower::person_id.eq(person_id_join)),
 257         ),
 258       )
 259       .left_join(
 260         comment_saved::table.on(
 261           comment::id
 262             .eq(comment_saved::comment_id)
 263             .and(comment_saved::person_id.eq(person_id_join)),
 264         ),
 265       )
 266       .left_join(
 267         person_block::table.on(
 268           comment::creator_id
 269             .eq(person_block::target_id)
 270             .and(person_block::person_id.eq(person_id_join)),
 271         ),
 272       )
 273       .left_join(
 274         comment_like::table.on(
 275           comment::id
 276             .eq(comment_like::comment_id)
 277             .and(comment_like::person_id.eq(person_id_join)),
 278         ),
 279       )
 280       .select((
 281         person_mention::all_columns,
 282         comment::all_columns,
 283         Person::safe_columns_tuple(),
 284         post::all_columns,
 285         Community::safe_columns_tuple(),
 286         PersonAlias1::safe_columns_tuple(),
 287         comment_aggregates::all_columns,
 288         community_person_ban::all_columns.nullable(),
 289         community_follower::all_columns.nullable(),
 290         comment_saved::all_columns.nullable(),
 291         person_block::all_columns.nullable(),
 292         comment_like::score.nullable(),
 293       ))
 294       .into_boxed();
 295
 296     if let Some(recipient_id) = self.recipient_id {
 297       query = query.filter(person_mention::recipient_id.eq(recipient_id));
 298     }
 299
 300     if self.unread_only.unwrap_or(false) {
 301       query = query.filter(person_mention::read.eq(false));
 302     }
 303
 304     query = match self.sort.unwrap_or(SortType::Hot) {
 305       SortType::Hot | SortType::Active => query
 306         .order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
 307         .then_order_by(comment_aggregates::published.desc()),
 308       SortType::New | SortType::MostComments | SortType::NewComments => {
 309         query.order_by(comment::published.desc())
 310       }
 311       SortType::TopAll => query.order_by(comment_aggregates::score.desc()),
 312       SortType::TopYear => query
 313         .filter(comment::published.gt(now - 1.years()))
 314         .order_by(comment_aggregates::score.desc()),
 315       SortType::TopMonth => query
 316         .filter(comment::published.gt(now - 1.months()))
 317         .order_by(comment_aggregates::score.desc()),
 318       SortType::TopWeek => query
 319         .filter(comment::published.gt(now - 1.weeks()))
 320         .order_by(comment_aggregates::score.desc()),
 321       SortType::TopDay => query
 322         .filter(comment::published.gt(now - 1.days()))
 323         .order_by(comment_aggregates::score.desc()),
 324     };
 325
 326     let (limit, offset) = limit_and_offset(self.page, self.limit);
 327
 328     let res = query
 329       .limit(limit)
 330       .offset(offset)
 331       .load::<PersonMentionViewTuple>(self.conn)?;
 332
 333     Ok(PersonMentionView::from_tuple_to_vec(res))
 334   }
 335 }
 336
 337 impl ViewToVec for PersonMentionView {
 338   type DbTuple = PersonMentionViewTuple;
 339   fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
 340     items
 341       .iter()
 342       .map(|a| Self {
 343         person_mention: a.0.to_owned(),
 344         comment: a.1.to_owned(),
 345         creator: a.2.to_owned(),
 346         post: a.3.to_owned(),
 347         community: a.4.to_owned(),
 348         recipient: a.5.to_owned(),
 349         counts: a.6.to_owned(),
 350         creator_banned_from_community: a.7.is_some(),
 351         subscribed: a.8.is_some(),
 352         saved: a.9.is_some(),
 353         creator_blocked: a.10.is_some(),
 354         my_vote: a.11,
 355       })
 356       .collect::<Vec<Self>>()
 357   }
 358 }