crates/db_views_actor/src/user_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_user_ban,
  20     post,
  21     user_,
  22     user_alias_1,
  23     user_mention,
  24   },
  25   source::{
  26     comment::{Comment, CommentSaved},
  27     community::{Community, CommunityFollower, CommunitySafe, CommunityUserBan},
  28     post::Post,
  29     user::{UserAlias1, UserSafe, UserSafeAlias1, User_},
  30     user_mention::UserMention,
  31   },
  32 };
  33 use serde::Serialize;
  34
  35 #[derive(Debug, PartialEq, Serialize, Clone)]
  36 pub struct UserMentionView {
  37   pub user_mention: UserMention,
  38   pub comment: Comment,
  39   pub creator: UserSafe,
  40   pub post: Post,
  41   pub community: CommunitySafe,
  42   pub recipient: UserSafeAlias1,
  43   pub counts: CommentAggregates,
  44   pub creator_banned_from_community: bool, // Left Join to CommunityUserBan
  45   pub subscribed: bool,                    // Left join to CommunityFollower
  46   pub saved: bool,                         // Left join to CommentSaved
  47   pub my_vote: Option<i16>,                // Left join to CommentLike
  48 }
  49
  50 type UserMentionViewTuple = (
  51   UserMention,
  52   Comment,
  53   UserSafe,
  54   Post,
  55   CommunitySafe,
  56   UserSafeAlias1,
  57   CommentAggregates,
  58   Option<CommunityUserBan>,
  59   Option<CommunityFollower>,
  60   Option<CommentSaved>,
  61   Option<i16>,
  62 );
  63
  64 impl UserMentionView {
  65   pub fn read(
  66     conn: &PgConnection,
  67     user_mention_id: i32,
  68     my_user_id: Option<i32>,
  69   ) -> Result<Self, Error> {
  70     // The left join below will return None in this case
  71     let user_id_join = my_user_id.unwrap_or(-1);
  72
  73     let (
  74       user_mention,
  75       comment,
  76       creator,
  77       post,
  78       community,
  79       recipient,
  80       counts,
  81       creator_banned_from_community,
  82       subscribed,
  83       saved,
  84       my_vote,
  85     ) = user_mention::table
  86       .find(user_mention_id)
  87       .inner_join(comment::table)
  88       .inner_join(user_::table.on(comment::creator_id.eq(user_::id)))
  89       .inner_join(post::table.on(comment::post_id.eq(post::id)))
  90       .inner_join(community::table.on(post::community_id.eq(community::id)))
  91       .inner_join(user_alias_1::table)
  92       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
  93       .left_join(
  94         community_user_ban::table.on(
  95           community::id
  96             .eq(community_user_ban::community_id)
  97             .and(community_user_ban::user_id.eq(comment::creator_id)),
  98         ),
  99       )
 100       .left_join(
 101         community_follower::table.on(
 102           post::community_id
 103             .eq(community_follower::community_id)
 104             .and(community_follower::user_id.eq(user_id_join)),
 105         ),
 106       )
 107       .left_join(
 108         comment_saved::table.on(
 109           comment::id
 110             .eq(comment_saved::comment_id)
 111             .and(comment_saved::user_id.eq(user_id_join)),
 112         ),
 113       )
 114       .left_join(
 115         comment_like::table.on(
 116           comment::id
 117             .eq(comment_like::comment_id)
 118             .and(comment_like::user_id.eq(user_id_join)),
 119         ),
 120       )
 121       .select((
 122         user_mention::all_columns,
 123         comment::all_columns,
 124         User_::safe_columns_tuple(),
 125         post::all_columns,
 126         Community::safe_columns_tuple(),
 127         UserAlias1::safe_columns_tuple(),
 128         comment_aggregates::all_columns,
 129         community_user_ban::all_columns.nullable(),
 130         community_follower::all_columns.nullable(),
 131         comment_saved::all_columns.nullable(),
 132         comment_like::score.nullable(),
 133       ))
 134       .first::<UserMentionViewTuple>(conn)?;
 135
 136     Ok(UserMentionView {
 137       user_mention,
 138       comment,
 139       creator,
 140       post,
 141       community,
 142       recipient,
 143       counts,
 144       creator_banned_from_community: creator_banned_from_community.is_some(),
 145       subscribed: subscribed.is_some(),
 146       saved: saved.is_some(),
 147       my_vote,
 148     })
 149   }
 150 }
 151
 152 pub struct UserMentionQueryBuilder<'a> {
 153   conn: &'a PgConnection,
 154   my_user_id: Option<i32>,
 155   recipient_id: Option<i32>,
 156   sort: &'a SortType,
 157   unread_only: bool,
 158   page: Option<i64>,
 159   limit: Option<i64>,
 160 }
 161
 162 impl<'a> UserMentionQueryBuilder<'a> {
 163   pub fn create(conn: &'a PgConnection) -> Self {
 164     UserMentionQueryBuilder {
 165       conn,
 166       my_user_id: None,
 167       recipient_id: None,
 168       sort: &SortType::New,
 169       unread_only: false,
 170       page: None,
 171       limit: None,
 172     }
 173   }
 174
 175   pub fn sort(mut self, sort: &'a SortType) -> Self {
 176     self.sort = sort;
 177     self
 178   }
 179
 180   pub fn unread_only(mut self, unread_only: bool) -> Self {
 181     self.unread_only = unread_only;
 182     self
 183   }
 184
 185   pub fn recipient_id<T: MaybeOptional<i32>>(mut self, recipient_id: T) -> Self {
 186     self.recipient_id = recipient_id.get_optional();
 187     self
 188   }
 189
 190   pub fn my_user_id<T: MaybeOptional<i32>>(mut self, my_user_id: T) -> Self {
 191     self.my_user_id = my_user_id.get_optional();
 192     self
 193   }
 194
 195   pub fn page<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
 196     self.page = page.get_optional();
 197     self
 198   }
 199
 200   pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
 201     self.limit = limit.get_optional();
 202     self
 203   }
 204
 205   pub fn list(self) -> Result<Vec<UserMentionView>, Error> {
 206     use diesel::dsl::*;
 207
 208     // The left join below will return None in this case
 209     let user_id_join = self.my_user_id.unwrap_or(-1);
 210
 211     let mut query = user_mention::table
 212       .inner_join(comment::table)
 213       .inner_join(user_::table.on(comment::creator_id.eq(user_::id)))
 214       .inner_join(post::table.on(comment::post_id.eq(post::id)))
 215       .inner_join(community::table.on(post::community_id.eq(community::id)))
 216       .inner_join(user_alias_1::table)
 217       .inner_join(comment_aggregates::table.on(comment::id.eq(comment_aggregates::comment_id)))
 218       .left_join(
 219         community_user_ban::table.on(
 220           community::id
 221             .eq(community_user_ban::community_id)
 222             .and(community_user_ban::user_id.eq(comment::creator_id)),
 223         ),
 224       )
 225       .left_join(
 226         community_follower::table.on(
 227           post::community_id
 228             .eq(community_follower::community_id)
 229             .and(community_follower::user_id.eq(user_id_join)),
 230         ),
 231       )
 232       .left_join(
 233         comment_saved::table.on(
 234           comment::id
 235             .eq(comment_saved::comment_id)
 236             .and(comment_saved::user_id.eq(user_id_join)),
 237         ),
 238       )
 239       .left_join(
 240         comment_like::table.on(
 241           comment::id
 242             .eq(comment_like::comment_id)
 243             .and(comment_like::user_id.eq(user_id_join)),
 244         ),
 245       )
 246       .select((
 247         user_mention::all_columns,
 248         comment::all_columns,
 249         User_::safe_columns_tuple(),
 250         post::all_columns,
 251         Community::safe_columns_tuple(),
 252         UserAlias1::safe_columns_tuple(),
 253         comment_aggregates::all_columns,
 254         community_user_ban::all_columns.nullable(),
 255         community_follower::all_columns.nullable(),
 256         comment_saved::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(user_mention::recipient_id.eq(recipient_id));
 263     }
 264
 265     if self.unread_only {
 266       query = query.filter(user_mention::read.eq(false));
 267     }
 268
 269     query = match self.sort {
 270       SortType::Hot | SortType::Active => query
 271         .order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
 272         .then_order_by(comment_aggregates::published.desc()),
 273       SortType::New => query.order_by(comment::published.desc()),
 274       SortType::TopAll => query.order_by(comment_aggregates::score.desc()),
 275       SortType::TopYear => query
 276         .filter(comment::published.gt(now - 1.years()))
 277         .order_by(comment_aggregates::score.desc()),
 278       SortType::TopMonth => query
 279         .filter(comment::published.gt(now - 1.months()))
 280         .order_by(comment_aggregates::score.desc()),
 281       SortType::TopWeek => query
 282         .filter(comment::published.gt(now - 1.weeks()))
 283         .order_by(comment_aggregates::score.desc()),
 284       SortType::TopDay => query
 285         .filter(comment::published.gt(now - 1.days()))
 286         .order_by(comment_aggregates::score.desc()),
 287     };
 288
 289     let (limit, offset) = limit_and_offset(self.page, self.limit);
 290
 291     let res = query
 292       .limit(limit)
 293       .offset(offset)
 294       .load::<UserMentionViewTuple>(self.conn)?;
 295
 296     Ok(UserMentionView::from_tuple_to_vec(res))
 297   }
 298 }
 299
 300 impl ViewToVec for UserMentionView {
 301   type DbTuple = UserMentionViewTuple;
 302   fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
 303     items
 304       .iter()
 305       .map(|a| Self {
 306         user_mention: a.0.to_owned(),
 307         comment: a.1.to_owned(),
 308         creator: a.2.to_owned(),
 309         post: a.3.to_owned(),
 310         community: a.4.to_owned(),
 311         recipient: a.5.to_owned(),
 312         counts: a.6.to_owned(),
 313         creator_banned_from_community: a.7.is_some(),
 314         subscribed: a.8.is_some(),
 315         saved: a.9.is_some(),
 316         my_vote: a.10,
 317       })
 318       .collect::<Vec<Self>>()
 319   }
 320 }