crates/db_views_actor/src/person_mention_view.rs

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