Add community alphabetic sorting (#5056)

* Started

* Finished? Need to write tests

* Formatting

* Formatting

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* Write tests

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* Unnecessary lifetime

* Safety

* Unwrap

* Formatting

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* Fix local_only test

* Formatting

* Name consistency

* Adding lower to community name sort.

---------

Co-authored-by: Dessalines <tyhou13@gmx.com>
Co-authored-by: Dessalines <dessalines@users.noreply.github.com>

crates/api_common/src/community.rs

@@ -3,9 +3,13 @@ use lemmy_db_schema::{
   source::site::Site,
   CommunityVisibility,
   ListingType,
-  PostSortType,
 };
-use lemmy_db_views_actor::structs::{CommunityModeratorView, CommunityView, PersonView};
+use lemmy_db_views_actor::structs::{
+  CommunityModeratorView,
+  CommunitySortType,
+  CommunityView,
+  PersonView,
+};
 use serde::{Deserialize, Serialize};
 use serde_with::skip_serializing_none;
 #[cfg(feature = "full")]
@@ -74,7 +78,7 @@ pub struct CommunityResponse {
 /// Fetches a list of communities.
 pub struct ListCommunities {
   pub type_: Option<ListingType>,
-  pub sort: Option<PostSortType>,
+  pub sort: Option<CommunitySortType>,
   pub show_nsfw: Option<bool>,
   pub page: Option<i64>,
   pub limit: Option<i64>,

crates/apub/src/api/search.rs

@@ -12,7 +12,11 @@ use lemmy_db_views::{
   post_view::PostQuery,
   structs::{LocalUserView, SiteView},
 };
-use lemmy_db_views_actor::{community_view::CommunityQuery, person_view::PersonQuery};
+use lemmy_db_views_actor::{
+  community_view::CommunityQuery,
+  person_view::PersonQuery,
+  structs::CommunitySortType,
+};
 use lemmy_utils::error::LemmyResult;
 
 #[tracing::instrument(skip(context))]
@@ -102,7 +106,7 @@ pub async fn search(
   };
 
   let community_query = CommunityQuery {
-    sort,
+    sort: sort.map(CommunitySortType::from),
     listing_type,
     search_term: Some(q.clone()),
     title_only,

crates/db_views_actor/src/community_view.rs

@@ -1,4 +1,4 @@
-use crate::structs::{CommunityModeratorView, CommunityView, PersonView};
+use crate::structs::{CommunityModeratorView, CommunitySortType, CommunityView, PersonView};
 use diesel::{
   pg::Pg,
   result::Error,
@@ -22,7 +22,16 @@ use lemmy_db_schema::{
     instance_block,
   },
   source::{community::CommunityFollower, local_user::LocalUser, site::Site},
-  utils::{fuzzy_search, limit_and_offset, DbConn, DbPool, ListFn, Queries, ReadFn},
+  utils::{
+    functions::lower,
+    fuzzy_search,
+    limit_and_offset,
+    DbConn,
+    DbPool,
+    ListFn,
+    Queries,
+    ReadFn,
+  },
   ListingType,
   PostSortType,
 };
@@ -103,7 +112,7 @@ fn queries<'a>() -> Queries<
   };
 
   let list = move |mut conn: DbConn<'a>, (options, site): (CommunityQuery<'a>, &'a Site)| async move {
-    use PostSortType::*;
+    use CommunitySortType::*;
 
     // The left join below will return None in this case
     let person_id_join = options.local_user.person_id().unwrap_or(PersonId(-1));
@@ -148,6 +157,8 @@ fn queries<'a>() -> Queries<
       }
       TopMonth => query = query.order_by(community_aggregates::users_active_month.desc()),
       TopWeek => query = query.order_by(community_aggregates::users_active_week.desc()),
+      NameAsc => query = query.order_by(lower(community::name).asc()),
+      NameDesc => query = query.order_by(lower(community::name).desc()),
     };
 
     if let Some(listing_type) = options.listing_type {
@@ -228,10 +239,36 @@ impl CommunityView {
   }
 }
 
+impl From<PostSortType> for CommunitySortType {
+  fn from(value: PostSortType) -> Self {
+    match value {
+      PostSortType::Active => Self::Active,
+      PostSortType::Hot => Self::Hot,
+      PostSortType::New => Self::New,
+      PostSortType::Old => Self::Old,
+      PostSortType::TopDay => Self::TopDay,
+      PostSortType::TopWeek => Self::TopWeek,
+      PostSortType::TopMonth => Self::TopMonth,
+      PostSortType::TopYear => Self::TopYear,
+      PostSortType::TopAll => Self::TopAll,
+      PostSortType::MostComments => Self::MostComments,
+      PostSortType::NewComments => Self::NewComments,
+      PostSortType::TopHour => Self::TopHour,
+      PostSortType::TopSixHour => Self::TopSixHour,
+      PostSortType::TopTwelveHour => Self::TopTwelveHour,
+      PostSortType::TopThreeMonths => Self::TopThreeMonths,
+      PostSortType::TopSixMonths => Self::TopSixMonths,
+      PostSortType::TopNineMonths => Self::TopNineMonths,
+      PostSortType::Controversial => Self::Controversial,
+      PostSortType::Scaled => Self::Scaled,
+    }
+  }
+}
+
 #[derive(Default)]
 pub struct CommunityQuery<'a> {
   pub listing_type: Option<ListingType>,
-  pub sort: Option<PostSortType>,
+  pub sort: Option<CommunitySortType>,
   pub local_user: Option<&'a LocalUser>,
   pub search_term: Option<String>,
   pub title_only: Option<bool>,
@@ -250,7 +287,10 @@ impl<'a> CommunityQuery<'a> {
 #[cfg(test)]
 mod tests {
 
-  use crate::{community_view::CommunityQuery, structs::CommunityView};
+  use crate::{
+    community_view::CommunityQuery,
+    structs::{CommunitySortType, CommunityView},
+  };
   use lemmy_db_schema::{
     source::{
       community::{Community, CommunityInsertForm, CommunityUpdateForm},
@@ -270,7 +310,7 @@ mod tests {
   struct Data {
     inserted_instance: Instance,
     local_user: LocalUser,
-    inserted_community: Community,
+    inserted_communities: [Community; 3],
     site: Site,
   }
 
@@ -286,13 +326,38 @@ mod tests {
     let local_user_form = LocalUserInsertForm::test_form(inserted_person.id);
     let local_user = LocalUser::create(pool, &local_user_form, vec![]).await?;
 
-    let new_community = CommunityInsertForm::new(
+    let inserted_communities = [
+      Community::create(
+        pool,
+        &CommunityInsertForm::new(
+          inserted_instance.id,
+          "test_community_1".to_string(),
+          "nada1".to_owned(),
+          "pubkey".to_string(),
+        ),
+      )
+      .await?,
+      Community::create(
+        pool,
+        &CommunityInsertForm::new(
+          inserted_instance.id,
+          "test_community_2".to_string(),
+          "nada2".to_owned(),
+          "pubkey".to_string(),
+        ),
+      )
+      .await?,
+      Community::create(
+        pool,
+        &CommunityInsertForm::new(
           inserted_instance.id,
           "test_community_3".to_string(),
-      "nada".to_owned(),
+          "nada3".to_owned(),
           "pubkey".to_string(),
-    );
-    let inserted_community = Community::create(pool, &new_community).await?;
+        ),
+      )
+      .await?,
+    ];
 
     let url = Url::parse("http://example.com")?;
     let site = Site {
@@ -316,13 +381,15 @@ mod tests {
     Ok(Data {
       inserted_instance,
       local_user,
-      inserted_community,
+      inserted_communities,
       site,
     })
   }
 
   async fn cleanup(data: Data, pool: &mut DbPool<'_>) -> LemmyResult<()> {
-    Community::delete(pool, data.inserted_community.id).await?;
+    for Community { id, .. } in data.inserted_communities {
+      Community::delete(pool, id).await?;
+    }
     Person::delete(pool, data.local_user.person_id).await?;
     Instance::delete(pool, data.inserted_instance.id).await?;
 
@@ -338,7 +405,7 @@ mod tests {
 
     Community::update(
       pool,
-      data.inserted_community.id,
+      data.inserted_communities[0].id,
       &CommunityUpdateForm {
         visibility: Some(CommunityVisibility::LocalOnly),
         ..Default::default()
@@ -351,7 +418,10 @@ mod tests {
     }
     .list(&data.site, pool)
     .await?;
-    assert_eq!(0, unauthenticated_query.len());
+    assert_eq!(
+      data.inserted_communities.len() - 1,
+      unauthenticated_query.len()
+    );
 
     let authenticated_query = CommunityQuery {
       local_user: Some(&data.local_user),
@@ -359,15 +429,15 @@ mod tests {
     }
     .list(&data.site, pool)
     .await?;
-    assert_eq!(1, authenticated_query.len());
+    assert_eq!(data.inserted_communities.len(), authenticated_query.len());
 
     let unauthenticated_community =
-      CommunityView::read(pool, data.inserted_community.id, None, false).await;
+      CommunityView::read(pool, data.inserted_communities[0].id, None, false).await;
     assert!(unauthenticated_community.is_err());
 
     let authenticated_community = CommunityView::read(
       pool,
-      data.inserted_community.id,
+      data.inserted_communities[0].id,
       Some(&data.local_user),
       false,
     )
@@ -376,4 +446,34 @@ mod tests {
 
     cleanup(data, pool).await
   }
+
+  #[tokio::test]
+  #[serial]
+  async fn community_sort_name() -> LemmyResult<()> {
+    let pool = &build_db_pool_for_tests().await;
+    let pool = &mut pool.into();
+    let data = init_data(pool).await?;
+
+    let query = CommunityQuery {
+      sort: Some(CommunitySortType::NameAsc),
+      ..Default::default()
+    };
+    let communities = query.list(&data.site, pool).await?;
+    for (i, c) in communities.iter().enumerate().skip(1) {
+      let prev = communities.get(i - 1).expect("No previous community?");
+      assert!(c.community.title.cmp(&prev.community.title).is_ge());
+    }
+
+    let query = CommunityQuery {
+      sort: Some(CommunitySortType::NameDesc),
+      ..Default::default()
+    };
+    let communities = query.list(&data.site, pool).await?;
+    for (i, c) in communities.iter().enumerate().skip(1) {
+      let prev = communities.get(i - 1).expect("No previous community?");
+      assert!(c.community.title.cmp(&prev.community.title).is_le());
+    }
+
+    cleanup(data, pool).await
+  }
 }

crates/db_views_actor/src/structs.rs

@@ -59,6 +59,35 @@ pub struct CommunityView {
   pub banned_from_community: bool,
 }
 
+/// The community sort types. See here for descriptions: https://join-lemmy.org/docs/en/users/03-votes-and-ranking.html
+#[derive(Debug, Serialize, Deserialize, Clone, Copy, Default, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "full", derive(TS))]
+#[cfg_attr(feature = "full", ts(export))]
+pub enum CommunitySortType {
+  #[default]
+  Active,
+  Hot,
+  New,
+  Old,
+  TopDay,
+  TopWeek,
+  TopMonth,
+  TopYear,
+  TopAll,
+  MostComments,
+  NewComments,
+  TopHour,
+  TopSixHour,
+  TopTwelveHour,
+  TopThreeMonths,
+  TopSixMonths,
+  TopNineMonths,
+  Controversial,
+  Scaled,
+  NameAsc,
+  NameDesc,
+}
+
 #[skip_serializing_none]
 #[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
 #[cfg_attr(feature = "full", derive(TS, Queryable))]