lemmy/server/src/actions/comment_view.rs

extern crate diesel;
use diesel::*;
use diesel::result::Error;
use diesel::dsl::*;
use serde::{Deserialize, Serialize};
use { SortType, limit_and_offset };

// The faked schema since diesel doesn't do views
table! {
  comment_view (id) {
    id -> Int4,
    creator_id -> Int4,
    post_id -> Int4,
    parent_id -> Nullable<Int4>,
    content -> Text,
    removed -> Nullable<Bool>,
    published -> Timestamp,
    updated -> Nullable<Timestamp>,
    community_id -> Int4,
    banned -> Nullable<Bool>,
    creator_name -> Varchar,
    score -> BigInt,
    upvotes -> BigInt,
    downvotes -> BigInt,
    user_id -> Nullable<Int4>,
    my_vote -> Nullable<Int4>,
    am_mod -> Nullable<Bool>,
  }
}

#[derive(Queryable, Identifiable, PartialEq, Debug, Serialize, Deserialize,QueryableByName,Clone)]
#[table_name="comment_view"]
pub struct CommentView {
  pub id: i32,
  pub creator_id: i32,
  pub post_id: i32,
  pub parent_id: Option<i32>,
  pub content: String,
  pub removed: Option<bool>,
  pub published: chrono::NaiveDateTime,
  pub updated: Option<chrono::NaiveDateTime>,
  pub community_id: i32,
  pub banned: Option<bool>,
  pub creator_name: String,
  pub score: i64,
  pub upvotes: i64,
  pub downvotes: i64,
  pub user_id: Option<i32>,
  pub my_vote: Option<i32>,
  pub am_mod: Option<bool>,
}

impl CommentView {

  pub fn list(conn: &PgConnection, 
              sort: &SortType, 
              for_post_id: Option<i32>, 
              for_creator_id: Option<i32>, 
              my_user_id: Option<i32>, 
              page: Option<i64>,
              limit: Option<i64>,
              ) -> Result<Vec<Self>, Error> {
    use actions::comment_view::comment_view::dsl::*;

    let (limit, offset) = limit_and_offset(page, limit);

    // TODO no limits here?
    let mut query = comment_view.into_boxed();

    // The view lets you pass a null user_id, if you're not logged in
    if let Some(my_user_id) = my_user_id {
      query = query.filter(user_id.eq(my_user_id));
    } else {
      query = query.filter(user_id.is_null());
    }

    if let Some(for_creator_id) = for_creator_id {
      query = query.filter(creator_id.eq(for_creator_id));
    };

    if let Some(for_post_id) = for_post_id {
      query = query.filter(post_id.eq(for_post_id));
    };

    query = match sort {
      // SortType::Hot => query.order_by(hot_rank.desc()),
      SortType::New => query.order_by(published.desc()),
      SortType::TopAll => query.order_by(score.desc()),
      SortType::TopYear => query
        .filter(published.gt(now - 1.years()))
        .order_by(score.desc()),
        SortType::TopMonth => query
          .filter(published.gt(now - 1.months()))
          .order_by(score.desc()),
          SortType::TopWeek => query
            .filter(published.gt(now - 1.weeks()))
            .order_by(score.desc()),
            SortType::TopDay => query
              .filter(published.gt(now - 1.days()))
              .order_by(score.desc()),
              _ => query.order_by(published.desc())
    };

    query
      .limit(limit)
      .offset(offset)
      .load::<Self>(conn) 
  }

  pub fn read(conn: &PgConnection, from_comment_id: i32, my_user_id: Option<i32>) -> Result<Self, Error> {
    use actions::comment_view::comment_view::dsl::*;

    let mut query = comment_view.into_boxed();

    // The view lets you pass a null user_id, if you're not logged in
    if let Some(my_user_id) = my_user_id {
      query = query.filter(user_id.eq(my_user_id));
    } else {
      query = query.filter(user_id.is_null());
    }

    query = query.filter(id.eq(from_comment_id)).order_by(published.desc());

    query.first::<Self>(conn) 
  }

}


#[cfg(test)]
mod tests {
  use establish_connection;
  use super::*;
  use actions::post::*;
  use actions::community::*;
  use actions::user::*;
  use actions::comment::*;
  use {Crud,Likeable};
 #[test]
  fn test_crud() {
    let conn = establish_connection();

    let new_user = UserForm {
      name: "timmy".into(),
      fedi_name: "rrf".into(),
      preferred_username: None,
      password_encrypted: "nope".into(),
      email: None,
      admin: false,
      banned: false,
      updated: None
    };

    let inserted_user = User_::create(&conn, &new_user).unwrap();

    let new_community = CommunityForm {
      name: "test community 5".to_string(),
      title: "nada".to_owned(),
      description: None,
      category_id: 1,
      creator_id: inserted_user.id,
      removed: None,
      updated: None
    };

    let inserted_community = Community::create(&conn, &new_community).unwrap();
    
    let new_post = PostForm {
      name: "A test post 2".into(),
      creator_id: inserted_user.id,
      url: None,
      body: None,
      community_id: inserted_community.id,
      removed: None,
      locked: None,
      updated: None
    };

    let inserted_post = Post::create(&conn, &new_post).unwrap();

    let comment_form = CommentForm {
      content: "A test comment 32".into(),
      creator_id: inserted_user.id,
      post_id: inserted_post.id,
      parent_id: None,
      removed: None,
      updated: None
    };

    let inserted_comment = Comment::create(&conn, &comment_form).unwrap();

    let comment_like_form = CommentLikeForm {
      comment_id: inserted_comment.id,
      post_id: inserted_post.id,
      user_id: inserted_user.id,
      score: 1
    };

    let _inserted_comment_like = CommentLike::like(&conn, &comment_like_form).unwrap();

    let expected_comment_view_no_user = CommentView {
      id: inserted_comment.id,
      content: "A test comment 32".into(),
      creator_id: inserted_user.id,
      post_id: inserted_post.id,
      community_id: inserted_community.id,
      parent_id: None,
      removed: Some(false),
      banned: None,
      published: inserted_comment.published,
      updated: None,
      creator_name: inserted_user.name.to_owned(),
      score: 1,
      downvotes: 0,
      upvotes: 1,
      user_id: None,
      my_vote: None,
      am_mod: None,
    };

    let expected_comment_view_with_user = CommentView {
      id: inserted_comment.id,
      content: "A test comment 32".into(),
      creator_id: inserted_user.id,
      post_id: inserted_post.id,
      community_id: inserted_community.id,
      parent_id: None,
      removed: Some(false),
      banned: None,
      published: inserted_comment.published,
      updated: None,
      creator_name: inserted_user.name.to_owned(),
      score: 1,
      downvotes: 0,
      upvotes: 1,
      user_id: Some(inserted_user.id),
      my_vote: Some(1),
      am_mod: None,
    };

    let read_comment_views_no_user = CommentView::list(&conn, &SortType::New, Some(inserted_post.id), None, None, None, None).unwrap();
    let read_comment_views_with_user = CommentView::list(&conn, &SortType::New, Some(inserted_post.id), None, Some(inserted_user.id), None, None).unwrap();
    let like_removed = CommentLike::remove(&conn, &comment_like_form).unwrap();
    let num_deleted = Comment::delete(&conn, inserted_comment.id).unwrap();
    Post::delete(&conn, inserted_post.id).unwrap();
    Community::delete(&conn, inserted_community.id).unwrap();
    User_::delete(&conn, inserted_user.id).unwrap();

    assert_eq!(expected_comment_view_no_user, read_comment_views_no_user[0]);
    assert_eq!(expected_comment_view_with_user, read_comment_views_with_user[0]);
    assert_eq!(1, num_deleted);
    assert_eq!(1, like_removed);
  }
}