crates/db_views_actor/src/user_view.rs

   1 use diesel::{dsl::*, result::Error, *};
   2 use lemmy_db_queries::{
   3   aggregates::user_aggregates::UserAggregates,
   4   fuzzy_search,
   5   limit_and_offset,
   6   MaybeOptional,
   7   SortType,
   8   ToSafe,
   9   ViewToVec,
  10 };
  11 use lemmy_db_schema::{
  12   schema::{user_, user_aggregates},
  13   source::user::{UserSafe, User_},
  14 };
  15 use serde::Serialize;
  16
  17 #[derive(Debug, Serialize, Clone)]
  18 pub struct UserViewSafe {
  19   pub user: UserSafe,
  20   pub counts: UserAggregates,
  21 }
  22
  23 type UserViewSafeTuple = (UserSafe, UserAggregates);
  24
  25 impl UserViewSafe {
  26   pub fn read(conn: &PgConnection, id: i32) -> Result<Self, Error> {
  27     let (user, counts) = user_::table
  28       .find(id)
  29       .inner_join(user_aggregates::table)
  30       .select((User_::safe_columns_tuple(), user_aggregates::all_columns))
  31       .first::<UserViewSafeTuple>(conn)?;
  32     Ok(Self { user, counts })
  33   }
  34
  35   pub fn admins(conn: &PgConnection) -> Result<Vec<Self>, Error> {
  36     let admins = user_::table
  37       .inner_join(user_aggregates::table)
  38       .select((User_::safe_columns_tuple(), user_aggregates::all_columns))
  39       .filter(user_::admin.eq(true))
  40       .order_by(user_::published)
  41       .load::<UserViewSafeTuple>(conn)?;
  42
  43     Ok(Self::from_tuple_to_vec(admins))
  44   }
  45
  46   pub fn banned(conn: &PgConnection) -> Result<Vec<Self>, Error> {
  47     let banned = user_::table
  48       .inner_join(user_aggregates::table)
  49       .select((User_::safe_columns_tuple(), user_aggregates::all_columns))
  50       .filter(user_::banned.eq(true))
  51       .load::<UserViewSafeTuple>(conn)?;
  52
  53     Ok(Self::from_tuple_to_vec(banned))
  54   }
  55 }
  56
  57 pub struct UserQueryBuilder<'a> {
  58   conn: &'a PgConnection,
  59   sort: &'a SortType,
  60   search_term: Option<String>,
  61   page: Option<i64>,
  62   limit: Option<i64>,
  63 }
  64
  65 impl<'a> UserQueryBuilder<'a> {
  66   pub fn create(conn: &'a PgConnection) -> Self {
  67     UserQueryBuilder {
  68       conn,
  69       search_term: None,
  70       sort: &SortType::Hot,
  71       page: None,
  72       limit: None,
  73     }
  74   }
  75
  76   pub fn sort(mut self, sort: &'a SortType) -> Self {
  77     self.sort = sort;
  78     self
  79   }
  80
  81   pub fn search_term<T: MaybeOptional<String>>(mut self, search_term: T) -> Self {
  82     self.search_term = search_term.get_optional();
  83     self
  84   }
  85
  86   pub fn page<T: MaybeOptional<i64>>(mut self, page: T) -> Self {
  87     self.page = page.get_optional();
  88     self
  89   }
  90
  91   pub fn limit<T: MaybeOptional<i64>>(mut self, limit: T) -> Self {
  92     self.limit = limit.get_optional();
  93     self
  94   }
  95
  96   pub fn list(self) -> Result<Vec<UserViewSafe>, Error> {
  97     let mut query = user_::table
  98       .inner_join(user_aggregates::table)
  99       .select((User_::safe_columns_tuple(), user_aggregates::all_columns))
 100       .into_boxed();
 101
 102     if let Some(search_term) = self.search_term {
 103       query = query.filter(user_::name.ilike(fuzzy_search(&search_term)));
 104     }
 105
 106     query = match self.sort {
 107       SortType::Hot => query
 108         .order_by(user_aggregates::comment_score.desc())
 109         .then_order_by(user_::published.desc()),
 110       SortType::Active => query
 111         .order_by(user_aggregates::comment_score.desc())
 112         .then_order_by(user_::published.desc()),
 113       SortType::New => query.order_by(user_::published.desc()),
 114       SortType::TopAll => query.order_by(user_aggregates::comment_score.desc()),
 115       SortType::TopYear => query
 116         .filter(user_::published.gt(now - 1.years()))
 117         .order_by(user_aggregates::comment_score.desc()),
 118       SortType::TopMonth => query
 119         .filter(user_::published.gt(now - 1.months()))
 120         .order_by(user_aggregates::comment_score.desc()),
 121       SortType::TopWeek => query
 122         .filter(user_::published.gt(now - 1.weeks()))
 123         .order_by(user_aggregates::comment_score.desc()),
 124       SortType::TopDay => query
 125         .filter(user_::published.gt(now - 1.days()))
 126         .order_by(user_aggregates::comment_score.desc()),
 127     };
 128
 129     let (limit, offset) = limit_and_offset(self.page, self.limit);
 130     query = query.limit(limit).offset(offset);
 131
 132     let res = query.load::<UserViewSafeTuple>(self.conn)?;
 133
 134     Ok(UserViewSafe::from_tuple_to_vec(res))
 135   }
 136 }
 137
 138 impl ViewToVec for UserViewSafe {
 139   type DbTuple = UserViewSafeTuple;
 140   fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
 141     items
 142       .iter()
 143       .map(|a| Self {
 144         user: a.0.to_owned(),
 145         counts: a.1.to_owned(),
 146       })
 147       .collect::<Vec<Self>>()
 148   }
 149 }