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