crates/db_views/src/comment_view.rs

   1 use crate::structs::{CommentView, LocalUserView};
   2 use diesel::{
   3   result::Error,
   4   BoolExpressionMethods,
   5   ExpressionMethods,
   6   JoinOnDsl,
   7   NullableExpressionMethods,
   8   PgTextExpressionMethods,
   9   QueryDsl,
  10 };
  11 use diesel_async::RunQueryDsl;
  12 use diesel_ltree::{nlevel, subpath, Ltree, LtreeExtensions};
  13 use lemmy_db_schema::{
  14   aggregates::structs::CommentAggregates,
  15   newtypes::{CommentId, CommunityId, LocalUserId, PersonId, PostId},
  16   schema::{
  17     comment,
  18     comment_aggregates,
  19     comment_like,
  20     comment_saved,
  21     community,
  22     community_block,
  23     community_follower,
  24     community_person_ban,
  25     local_user_language,
  26     person,
  27     person_block,
  28     post,
  29   },
  30   source::{
  31     comment::{Comment, CommentSaved},
  32     community::{Community, CommunityFollower, CommunityPersonBan},
  33     person::Person,
  34     person_block::PersonBlock,
  35     post::Post,
  36   },
  37   traits::JoinView,
  38   utils::{fuzzy_search, get_conn, limit_and_offset, DbPool},
  39   CommentSortType,
  40   ListingType,
  41 };
  42
  43 type CommentViewTuple = (
  44   Comment,
  45   Person,
  46   Post,
  47   Community,
  48   CommentAggregates,
  49   Option<CommunityPersonBan>,
  50   Option<CommunityFollower>,
  51   Option<CommentSaved>,
  52   Option<PersonBlock>,
  53   Option<i16>,
  54 );
  55
  56 impl CommentView {
  57   pub async fn read(
  58     pool: &mut DbPool<'_>,
  59     comment_id: CommentId,
  60     my_person_id: Option<PersonId>,
  61   ) -> Result<Self, Error> {
  62     let conn = &mut get_conn(pool).await?;
  63
  64     // The left join below will return None in this case
  65     let person_id_join = my_person_id.unwrap_or(PersonId(-1));
  66
  67     let (
  68       comment,
  69       creator,
  70       post,
  71       community,
  72       counts,
  73       creator_banned_from_community,
  74       follower,
  75       saved,
  76       creator_blocked,
  77       comment_like,
  78     ) = comment::table
  79       .find(comment_id)
  80       .inner_join(person::table)
  81       .inner_join(post::table)
  82       .inner_join(community::table.on(post::community_id.eq(community::id)))
  83       .inner_join(comment_aggregates::table)
  84       .left_join(
  85         community_person_ban::table.on(
  86           community::id
  87             .eq(community_person_ban::community_id)
  88             .and(community_person_ban::person_id.eq(comment::creator_id)),
  89         ),
  90       )
  91       .left_join(
  92         community_follower::table.on(
  93           post::community_id
  94             .eq(community_follower::community_id)
  95             .and(community_follower::person_id.eq(person_id_join)),
  96         ),
  97       )
  98       .left_join(
  99         comment_saved::table.on(
 100           comment::id
 101             .eq(comment_saved::comment_id)
 102             .and(comment_saved::person_id.eq(person_id_join)),
 103         ),
 104       )
 105       .left_join(
 106         person_block::table.on(
 107           comment::creator_id
 108             .eq(person_block::target_id)
 109             .and(person_block::person_id.eq(person_id_join)),
 110         ),
 111       )
 112       .left_join(
 113         comment_like::table.on(
 114           comment::id
 115             .eq(comment_like::comment_id)
 116             .and(comment_like::person_id.eq(person_id_join)),
 117         ),
 118       )
 119       .select((
 120         comment::all_columns,
 121         person::all_columns,
 122         post::all_columns,
 123         community::all_columns,
 124         comment_aggregates::all_columns,
 125         community_person_ban::all_columns.nullable(),
 126         community_follower::all_columns.nullable(),
 127         comment_saved::all_columns.nullable(),
 128         person_block::all_columns.nullable(),
 129         comment_like::score.nullable(),
 130       ))
 131       .first::<CommentViewTuple>(conn)
 132       .await?;
 133
 134     // If a person is given, then my_vote, if None, should be 0, not null
 135     // Necessary to differentiate between other person's votes
 136     let my_vote = if my_person_id.is_some() && comment_like.is_none() {
 137       Some(0)
 138     } else {
 139       comment_like
 140     };
 141
 142     Ok(CommentView {
 143       comment,
 144       post,
 145       creator,
 146       community,
 147       counts,
 148       creator_banned_from_community: creator_banned_from_community.is_some(),
 149       subscribed: CommunityFollower::to_subscribed_type(&follower),
 150       saved: saved.is_some(),
 151       creator_blocked: creator_blocked.is_some(),
 152       my_vote,
 153     })
 154   }
 155 }
 156
 157 #[derive(Default)]
 158 pub struct CommentQuery<'a> {
 159   pub listing_type: Option<ListingType>,
 160   pub sort: Option<CommentSortType>,
 161   pub community_id: Option<CommunityId>,
 162   pub post_id: Option<PostId>,
 163   pub parent_path: Option<Ltree>,
 164   pub creator_id: Option<PersonId>,
 165   pub local_user: Option<&'a LocalUserView>,
 166   pub search_term: Option<String>,
 167   pub saved_only: Option<bool>,
 168   pub is_profile_view: Option<bool>,
 169   pub show_deleted_and_removed: Option<bool>,
 170   pub page: Option<i64>,
 171   pub limit: Option<i64>,
 172   pub max_depth: Option<i32>,
 173 }
 174
 175 impl<'a> CommentQuery<'a> {
 176   pub async fn list(self, pool: &mut DbPool<'_>) -> Result<Vec<CommentView>, Error> {
 177     let conn = &mut get_conn(pool).await?;
 178
 179     // The left join below will return None in this case
 180     let person_id_join = self.local_user.map(|l| l.person.id).unwrap_or(PersonId(-1));
 181     let local_user_id_join = self
 182       .local_user
 183       .map(|l| l.local_user.id)
 184       .unwrap_or(LocalUserId(-1));
 185
 186     let mut query = comment::table
 187       .inner_join(person::table)
 188       .inner_join(post::table)
 189       .inner_join(community::table.on(post::community_id.eq(community::id)))
 190       .inner_join(comment_aggregates::table)
 191       .left_join(
 192         community_person_ban::table.on(
 193           community::id
 194             .eq(community_person_ban::community_id)
 195             .and(community_person_ban::person_id.eq(comment::creator_id)),
 196         ),
 197       )
 198       .left_join(
 199         community_follower::table.on(
 200           post::community_id
 201             .eq(community_follower::community_id)
 202             .and(community_follower::person_id.eq(person_id_join)),
 203         ),
 204       )
 205       .left_join(
 206         comment_saved::table.on(
 207           comment::id
 208             .eq(comment_saved::comment_id)
 209             .and(comment_saved::person_id.eq(person_id_join)),
 210         ),
 211       )
 212       .left_join(
 213         person_block::table.on(
 214           comment::creator_id
 215             .eq(person_block::target_id)
 216             .and(person_block::person_id.eq(person_id_join)),
 217         ),
 218       )
 219       .left_join(
 220         community_block::table.on(
 221           community::id
 222             .eq(community_block::community_id)
 223             .and(community_block::person_id.eq(person_id_join)),
 224         ),
 225       )
 226       .left_join(
 227         comment_like::table.on(
 228           comment::id
 229             .eq(comment_like::comment_id)
 230             .and(comment_like::person_id.eq(person_id_join)),
 231         ),
 232       )
 233       .left_join(
 234         local_user_language::table.on(
 235           comment::language_id
 236             .eq(local_user_language::language_id)
 237             .and(local_user_language::local_user_id.eq(local_user_id_join)),
 238         ),
 239       )
 240       .select((
 241         comment::all_columns,
 242         person::all_columns,
 243         post::all_columns,
 244         community::all_columns,
 245         comment_aggregates::all_columns,
 246         community_person_ban::all_columns.nullable(),
 247         community_follower::all_columns.nullable(),
 248         comment_saved::all_columns.nullable(),
 249         person_block::all_columns.nullable(),
 250         comment_like::score.nullable(),
 251       ))
 252       .into_boxed();
 253
 254     if let Some(creator_id) = self.creator_id {
 255       query = query.filter(comment::creator_id.eq(creator_id));
 256     };
 257
 258     if let Some(post_id) = self.post_id {
 259       query = query.filter(comment::post_id.eq(post_id));
 260     };
 261
 262     if let Some(parent_path) = self.parent_path.as_ref() {
 263       query = query.filter(comment::path.contained_by(parent_path));
 264     };
 265
 266     if let Some(search_term) = self.search_term {
 267       query = query.filter(comment::content.ilike(fuzzy_search(&search_term)));
 268     };
 269
 270     if let Some(community_id) = self.community_id {
 271       query = query.filter(post::community_id.eq(community_id));
 272     }
 273
 274     if let Some(listing_type) = self.listing_type {
 275       match listing_type {
 276         ListingType::Subscribed => {
 277           query = query.filter(community_follower::person_id.is_not_null())
 278         } // TODO could be this: and(community_follower::person_id.eq(person_id_join)),
 279         ListingType::Local => {
 280           query = query.filter(community::local.eq(true)).filter(
 281             community::hidden
 282               .eq(false)
 283               .or(community_follower::person_id.eq(person_id_join)),
 284           )
 285         }
 286         ListingType::All => {
 287           query = query.filter(
 288             community::hidden
 289               .eq(false)
 290               .or(community_follower::person_id.eq(person_id_join)),
 291           )
 292         }
 293       }
 294     }
 295
 296     if self.saved_only.unwrap_or(false) {
 297       query = query.filter(comment_saved::comment_id.is_not_null());
 298     }
 299
 300     let is_profile_view = self.is_profile_view.unwrap_or(false);
 301     let is_creator = self.creator_id == self.local_user.map(|l| l.person.id);
 302     // only show deleted comments to creator
 303     if !is_creator {
 304       query = query.filter(comment::deleted.eq(false));
 305     }
 306
 307     let is_admin = self.local_user.map(|l| l.person.admin).unwrap_or(false);
 308     // only show removed comments to admin when viewing user profile
 309     if !(is_profile_view && is_admin) {
 310       query = query.filter(comment::removed.eq(false));
 311     }
 312
 313     if !self
 314       .local_user
 315       .map(|l| l.local_user.show_bot_accounts)
 316       .unwrap_or(true)
 317     {
 318       query = query.filter(person::bot_account.eq(false));
 319     };
 320
 321     if self.local_user.is_some() {
 322       // Filter out the rows with missing languages
 323       query = query.filter(local_user_language::language_id.is_not_null());
 324
 325       // Don't show blocked communities or persons
 326       if self.post_id.is_none() {
 327         query = query.filter(community_block::person_id.is_null());
 328       }
 329       query = query.filter(person_block::person_id.is_null());
 330     }
 331
 332     // A Max depth given means its a tree fetch
 333     let (limit, offset) = if let Some(max_depth) = self.max_depth {
 334       let depth_limit = if let Some(parent_path) = self.parent_path.as_ref() {
 335         parent_path.0.split('.').count() as i32 + max_depth
 336         // Add one because of root "0"
 337       } else {
 338         max_depth + 1
 339       };
 340
 341       query = query.filter(nlevel(comment::path).le(depth_limit));
 342
 343       // Always order by the parent path first
 344       query = query.order_by(subpath(comment::path, 0, -1));
 345
 346       // TODO limit question. Limiting does not work for comment threads ATM, only max_depth
 347       // For now, don't do any limiting for tree fetches
 348       // https://stackoverflow.com/questions/72983614/postgres-ltree-how-to-limit-the-max-number-of-children-at-any-given-level
 349
 350       // Don't use the regular error-checking one, many more comments must ofter be fetched.
 351       // This does not work for comment trees, and the limit should be manually set to a high number
 352       //
 353       // If a max depth is given, then you know its a tree fetch, and limits should be ignored
 354       // TODO a kludge to prevent attacks. Limit comments to 300 for now.
 355       // (i64::MAX, 0)
 356       (300, 0)
 357     } else {
 358       // limit_and_offset_unlimited(self.page, self.limit)
 359       limit_and_offset(self.page, self.limit)?
 360     };
 361
 362     query = match self.sort.unwrap_or(CommentSortType::Hot) {
 363       CommentSortType::Hot => query.then_order_by(comment_aggregates::hot_rank.desc()),
 364       CommentSortType::New => query.then_order_by(comment::published.desc()),
 365       CommentSortType::Old => query.then_order_by(comment::published.asc()),
 366       CommentSortType::Top => query.order_by(comment_aggregates::score.desc()),
 367     };
 368
 369     // Note: deleted and removed comments are done on the front side
 370     let res = query
 371       .limit(limit)
 372       .offset(offset)
 373       .load::<CommentViewTuple>(conn)
 374       .await?;
 375
 376     Ok(res.into_iter().map(CommentView::from_tuple).collect())
 377   }
 378 }
 379
 380 impl JoinView for CommentView {
 381   type JoinTuple = CommentViewTuple;
 382   fn from_tuple(a: Self::JoinTuple) -> Self {
 383     Self {
 384       comment: a.0,
 385       creator: a.1,
 386       post: a.2,
 387       community: a.3,
 388       counts: a.4,
 389       creator_banned_from_community: a.5.is_some(),
 390       subscribed: CommunityFollower::to_subscribed_type(&a.6),
 391       saved: a.7.is_some(),
 392       creator_blocked: a.8.is_some(),
 393       my_vote: a.9,
 394     }
 395   }
 396 }
 397
 398 #[cfg(test)]
 399 mod tests {
 400   #![allow(clippy::unwrap_used)]
 401   #![allow(clippy::indexing_slicing)]
 402
 403   use crate::{
 404     comment_view::{
 405       Comment,
 406       CommentQuery,
 407       CommentSortType,
 408       CommentView,
 409       Community,
 410       DbPool,
 411       Person,
 412       PersonBlock,
 413       Post,
 414     },
 415     structs::LocalUserView,
 416   };
 417   use lemmy_db_schema::{
 418     aggregates::structs::CommentAggregates,
 419     impls::actor_language::UNDETERMINED_ID,
 420     newtypes::LanguageId,
 421     source::{
 422       actor_language::LocalUserLanguage,
 423       comment::{CommentInsertForm, CommentLike, CommentLikeForm},
 424       community::CommunityInsertForm,
 425       instance::Instance,
 426       language::Language,
 427       local_user::{LocalUser, LocalUserInsertForm},
 428       person::PersonInsertForm,
 429       person_block::PersonBlockForm,
 430       post::PostInsertForm,
 431     },
 432     traits::{Blockable, Crud, Likeable},
 433     utils::build_db_pool_for_tests,
 434     SubscribedType,
 435   };
 436   use serial_test::serial;
 437
 438   struct Data {
 439     inserted_instance: Instance,
 440     inserted_comment_0: Comment,
 441     inserted_comment_1: Comment,
 442     inserted_comment_2: Comment,
 443     inserted_post: Post,
 444     local_user_view: LocalUserView,
 445     inserted_person_2: Person,
 446     inserted_community: Community,
 447   }
 448
 449   async fn init_data(pool: &mut DbPool<'_>) -> Data {
 450     let inserted_instance = Instance::read_or_create(pool, "my_domain.tld".to_string())
 451       .await
 452       .unwrap();
 453
 454     let new_person = PersonInsertForm::builder()
 455       .name("timmy".into())
 456       .public_key("pubkey".to_string())
 457       .instance_id(inserted_instance.id)
 458       .build();
 459     let inserted_person = Person::create(pool, &new_person).await.unwrap();
 460     let local_user_form = LocalUserInsertForm::builder()
 461       .person_id(inserted_person.id)
 462       .password_encrypted(String::new())
 463       .build();
 464     let inserted_local_user = LocalUser::create(pool, &local_user_form).await.unwrap();
 465
 466     let new_person_2 = PersonInsertForm::builder()
 467       .name("sara".into())
 468       .public_key("pubkey".to_string())
 469       .instance_id(inserted_instance.id)
 470       .build();
 471     let inserted_person_2 = Person::create(pool, &new_person_2).await.unwrap();
 472
 473     let new_community = CommunityInsertForm::builder()
 474       .name("test community 5".to_string())
 475       .title("nada".to_owned())
 476       .public_key("pubkey".to_string())
 477       .instance_id(inserted_instance.id)
 478       .build();
 479
 480     let inserted_community = Community::create(pool, &new_community).await.unwrap();
 481
 482     let new_post = PostInsertForm::builder()
 483       .name("A test post 2".into())
 484       .creator_id(inserted_person.id)
 485       .community_id(inserted_community.id)
 486       .build();
 487
 488     let inserted_post = Post::create(pool, &new_post).await.unwrap();
 489     let english_id = Language::read_id_from_code(pool, Some("en")).await.unwrap();
 490
 491     // Create a comment tree with this hierarchy
 492     //       0
 493     //     \     \
 494     //    1      2
 495     //    \
 496     //  3  4
 497     //     \
 498     //     5
 499     let comment_form_0 = CommentInsertForm::builder()
 500       .content("Comment 0".into())
 501       .creator_id(inserted_person.id)
 502       .post_id(inserted_post.id)
 503       .language_id(english_id)
 504       .build();
 505
 506     let inserted_comment_0 = Comment::create(pool, &comment_form_0, None).await.unwrap();
 507
 508     let comment_form_1 = CommentInsertForm::builder()
 509       .content("Comment 1, A test blocked comment".into())
 510       .creator_id(inserted_person_2.id)
 511       .post_id(inserted_post.id)
 512       .language_id(english_id)
 513       .build();
 514
 515     let inserted_comment_1 = Comment::create(pool, &comment_form_1, Some(&inserted_comment_0.path))
 516       .await
 517       .unwrap();
 518
 519     let finnish_id = Language::read_id_from_code(pool, Some("fi")).await.unwrap();
 520     let comment_form_2 = CommentInsertForm::builder()
 521       .content("Comment 2".into())
 522       .creator_id(inserted_person.id)
 523       .post_id(inserted_post.id)
 524       .language_id(finnish_id)
 525       .build();
 526
 527     let inserted_comment_2 = Comment::create(pool, &comment_form_2, Some(&inserted_comment_0.path))
 528       .await
 529       .unwrap();
 530
 531     let comment_form_3 = CommentInsertForm::builder()
 532       .content("Comment 3".into())
 533       .creator_id(inserted_person.id)
 534       .post_id(inserted_post.id)
 535       .language_id(english_id)
 536       .build();
 537
 538     let _inserted_comment_3 =
 539       Comment::create(pool, &comment_form_3, Some(&inserted_comment_1.path))
 540         .await
 541         .unwrap();
 542
 543     let polish_id = Language::read_id_from_code(pool, Some("pl"))
 544       .await
 545       .unwrap()
 546       .unwrap();
 547     let comment_form_4 = CommentInsertForm::builder()
 548       .content("Comment 4".into())
 549       .creator_id(inserted_person.id)
 550       .post_id(inserted_post.id)
 551       .language_id(Some(polish_id))
 552       .build();
 553
 554     let inserted_comment_4 = Comment::create(pool, &comment_form_4, Some(&inserted_comment_1.path))
 555       .await
 556       .unwrap();
 557
 558     let comment_form_5 = CommentInsertForm::builder()
 559       .content("Comment 5".into())
 560       .creator_id(inserted_person.id)
 561       .post_id(inserted_post.id)
 562       .build();
 563
 564     let _inserted_comment_5 =
 565       Comment::create(pool, &comment_form_5, Some(&inserted_comment_4.path))
 566         .await
 567         .unwrap();
 568
 569     let timmy_blocks_sara_form = PersonBlockForm {
 570       person_id: inserted_person.id,
 571       target_id: inserted_person_2.id,
 572     };
 573
 574     let inserted_block = PersonBlock::block(pool, &timmy_blocks_sara_form)
 575       .await
 576       .unwrap();
 577
 578     let expected_block = PersonBlock {
 579       id: inserted_block.id,
 580       person_id: inserted_person.id,
 581       target_id: inserted_person_2.id,
 582       published: inserted_block.published,
 583     };
 584     assert_eq!(expected_block, inserted_block);
 585
 586     let comment_like_form = CommentLikeForm {
 587       comment_id: inserted_comment_0.id,
 588       post_id: inserted_post.id,
 589       person_id: inserted_person.id,
 590       score: 1,
 591     };
 592
 593     let _inserted_comment_like = CommentLike::like(pool, &comment_like_form).await.unwrap();
 594
 595     let local_user_view = LocalUserView {
 596       local_user: inserted_local_user.clone(),
 597       person: inserted_person.clone(),
 598       counts: Default::default(),
 599     };
 600     Data {
 601       inserted_instance,
 602       inserted_comment_0,
 603       inserted_comment_1,
 604       inserted_comment_2,
 605       inserted_post,
 606       local_user_view,
 607       inserted_person_2,
 608       inserted_community,
 609     }
 610   }
 611
 612   #[tokio::test]
 613   #[serial]
 614   async fn test_crud() {
 615     let pool = &build_db_pool_for_tests().await;
 616     let pool = &mut pool.into();
 617     let data = init_data(pool).await;
 618
 619     let expected_comment_view_no_person = expected_comment_view(&data, pool).await;
 620
 621     let mut expected_comment_view_with_person = expected_comment_view_no_person.clone();
 622     expected_comment_view_with_person.my_vote = Some(1);
 623
 624     let read_comment_views_no_person = CommentQuery {
 625       sort: (Some(CommentSortType::Old)),
 626       post_id: (Some(data.inserted_post.id)),
 627       ..Default::default()
 628     }
 629     .list(pool)
 630     .await
 631     .unwrap();
 632
 633     assert_eq!(
 634       expected_comment_view_no_person,
 635       read_comment_views_no_person[0]
 636     );
 637
 638     let read_comment_views_with_person = CommentQuery {
 639       sort: (Some(CommentSortType::Old)),
 640       post_id: (Some(data.inserted_post.id)),
 641       local_user: (Some(&data.local_user_view)),
 642       ..Default::default()
 643     }
 644     .list(pool)
 645     .await
 646     .unwrap();
 647
 648     assert_eq!(
 649       expected_comment_view_with_person,
 650       read_comment_views_with_person[0]
 651     );
 652
 653     // Make sure its 1, not showing the blocked comment
 654     assert_eq!(5, read_comment_views_with_person.len());
 655
 656     let read_comment_from_blocked_person = CommentView::read(
 657       pool,
 658       data.inserted_comment_1.id,
 659       Some(data.local_user_view.person.id),
 660     )
 661     .await
 662     .unwrap();
 663
 664     // Make sure block set the creator blocked
 665     assert!(read_comment_from_blocked_person.creator_blocked);
 666
 667     cleanup(data, pool).await;
 668   }
 669
 670   #[tokio::test]
 671   #[serial]
 672   async fn test_comment_tree() {
 673     let pool = &build_db_pool_for_tests().await;
 674     let pool = &mut pool.into();
 675     let data = init_data(pool).await;
 676
 677     let top_path = data.inserted_comment_0.path.clone();
 678     let read_comment_views_top_path = CommentQuery {
 679       post_id: (Some(data.inserted_post.id)),
 680       parent_path: (Some(top_path)),
 681       ..Default::default()
 682     }
 683     .list(pool)
 684     .await
 685     .unwrap();
 686
 687     let child_path = data.inserted_comment_1.path.clone();
 688     let read_comment_views_child_path = CommentQuery {
 689       post_id: (Some(data.inserted_post.id)),
 690       parent_path: (Some(child_path)),
 691       ..Default::default()
 692     }
 693     .list(pool)
 694     .await
 695     .unwrap();
 696
 697     // Make sure the comment parent-limited fetch is correct
 698     assert_eq!(6, read_comment_views_top_path.len());
 699     assert_eq!(4, read_comment_views_child_path.len());
 700
 701     // Make sure it contains the parent, but not the comment from the other tree
 702     let child_comments = read_comment_views_child_path
 703       .into_iter()
 704       .map(|c| c.comment)
 705       .collect::<Vec<Comment>>();
 706     assert!(child_comments.contains(&data.inserted_comment_1));
 707     assert!(!child_comments.contains(&data.inserted_comment_2));
 708
 709     let read_comment_views_top_max_depth = CommentQuery {
 710       post_id: (Some(data.inserted_post.id)),
 711       max_depth: (Some(1)),
 712       ..Default::default()
 713     }
 714     .list(pool)
 715     .await
 716     .unwrap();
 717
 718     // Make sure a depth limited one only has the top comment
 719     assert_eq!(
 720       expected_comment_view(&data, pool).await,
 721       read_comment_views_top_max_depth[0]
 722     );
 723     assert_eq!(1, read_comment_views_top_max_depth.len());
 724
 725     let child_path = data.inserted_comment_1.path.clone();
 726     let read_comment_views_parent_max_depth = CommentQuery {
 727       post_id: (Some(data.inserted_post.id)),
 728       parent_path: (Some(child_path)),
 729       max_depth: (Some(1)),
 730       sort: (Some(CommentSortType::New)),
 731       ..Default::default()
 732     }
 733     .list(pool)
 734     .await
 735     .unwrap();
 736
 737     // Make sure a depth limited one, and given child comment 1, has 3
 738     assert!(read_comment_views_parent_max_depth[2]
 739       .comment
 740       .content
 741       .eq("Comment 3"));
 742     assert_eq!(3, read_comment_views_parent_max_depth.len());
 743
 744     cleanup(data, pool).await;
 745   }
 746
 747   #[tokio::test]
 748   #[serial]
 749   async fn test_languages() {
 750     let pool = &build_db_pool_for_tests().await;
 751     let pool = &mut pool.into();
 752     let data = init_data(pool).await;
 753
 754     // by default, user has all languages enabled and should see all comments
 755     // (except from blocked user)
 756     let all_languages = CommentQuery {
 757       local_user: (Some(&data.local_user_view)),
 758       ..Default::default()
 759     }
 760     .list(pool)
 761     .await
 762     .unwrap();
 763     assert_eq!(5, all_languages.len());
 764
 765     // change user lang to finnish, should only show one post in finnish and one undetermined
 766     let finnish_id = Language::read_id_from_code(pool, Some("fi"))
 767       .await
 768       .unwrap()
 769       .unwrap();
 770     LocalUserLanguage::update(pool, vec![finnish_id], data.local_user_view.local_user.id)
 771       .await
 772       .unwrap();
 773     let finnish_comments = CommentQuery {
 774       local_user: (Some(&data.local_user_view)),
 775       ..Default::default()
 776     }
 777     .list(pool)
 778     .await
 779     .unwrap();
 780     assert_eq!(2, finnish_comments.len());
 781     let finnish_comment = finnish_comments
 782       .iter()
 783       .find(|c| c.comment.language_id == finnish_id);
 784     assert!(finnish_comment.is_some());
 785     assert_eq!(
 786       data.inserted_comment_2.content,
 787       finnish_comment.unwrap().comment.content
 788     );
 789
 790     // now show all comments with undetermined language (which is the default value)
 791     LocalUserLanguage::update(
 792       pool,
 793       vec![UNDETERMINED_ID],
 794       data.local_user_view.local_user.id,
 795     )
 796     .await
 797     .unwrap();
 798     let undetermined_comment = CommentQuery {
 799       local_user: (Some(&data.local_user_view)),
 800       ..Default::default()
 801     }
 802     .list(pool)
 803     .await
 804     .unwrap();
 805     assert_eq!(1, undetermined_comment.len());
 806
 807     cleanup(data, pool).await;
 808   }
 809
 810   async fn cleanup(data: Data, pool: &mut DbPool<'_>) {
 811     CommentLike::remove(
 812       pool,
 813       data.local_user_view.person.id,
 814       data.inserted_comment_0.id,
 815     )
 816     .await
 817     .unwrap();
 818     Comment::delete(pool, data.inserted_comment_0.id)
 819       .await
 820       .unwrap();
 821     Comment::delete(pool, data.inserted_comment_1.id)
 822       .await
 823       .unwrap();
 824     Post::delete(pool, data.inserted_post.id).await.unwrap();
 825     Community::delete(pool, data.inserted_community.id)
 826       .await
 827       .unwrap();
 828     Person::delete(pool, data.local_user_view.person.id)
 829       .await
 830       .unwrap();
 831     Person::delete(pool, data.inserted_person_2.id)
 832       .await
 833       .unwrap();
 834     Instance::delete(pool, data.inserted_instance.id)
 835       .await
 836       .unwrap();
 837   }
 838
 839   async fn expected_comment_view(data: &Data, pool: &mut DbPool<'_>) -> CommentView {
 840     let agg = CommentAggregates::read(pool, data.inserted_comment_0.id)
 841       .await
 842       .unwrap();
 843     CommentView {
 844       creator_banned_from_community: false,
 845       my_vote: None,
 846       subscribed: SubscribedType::NotSubscribed,
 847       saved: false,
 848       creator_blocked: false,
 849       comment: Comment {
 850         id: data.inserted_comment_0.id,
 851         content: "Comment 0".into(),
 852         creator_id: data.local_user_view.person.id,
 853         post_id: data.inserted_post.id,
 854         removed: false,
 855         deleted: false,
 856         published: data.inserted_comment_0.published,
 857         ap_id: data.inserted_comment_0.ap_id.clone(),
 858         updated: None,
 859         local: true,
 860         distinguished: false,
 861         path: data.inserted_comment_0.clone().path,
 862         language_id: LanguageId(37),
 863       },
 864       creator: Person {
 865         id: data.local_user_view.person.id,
 866         name: "timmy".into(),
 867         display_name: None,
 868         published: data.local_user_view.person.published,
 869         avatar: None,
 870         actor_id: data.local_user_view.person.actor_id.clone(),
 871         local: true,
 872         banned: false,
 873         deleted: false,
 874         admin: false,
 875         bot_account: false,
 876         bio: None,
 877         banner: None,
 878         updated: None,
 879         inbox_url: data.local_user_view.person.inbox_url.clone(),
 880         shared_inbox_url: None,
 881         matrix_user_id: None,
 882         ban_expires: None,
 883         instance_id: data.inserted_instance.id,
 884         private_key: data.local_user_view.person.private_key.clone(),
 885         public_key: data.local_user_view.person.public_key.clone(),
 886         last_refreshed_at: data.local_user_view.person.last_refreshed_at,
 887       },
 888       post: Post {
 889         id: data.inserted_post.id,
 890         name: data.inserted_post.name.clone(),
 891         creator_id: data.local_user_view.person.id,
 892         url: None,
 893         body: None,
 894         published: data.inserted_post.published,
 895         updated: None,
 896         community_id: data.inserted_community.id,
 897         removed: false,
 898         deleted: false,
 899         locked: false,
 900         nsfw: false,
 901         embed_title: None,
 902         embed_description: None,
 903         embed_video_url: None,
 904         thumbnail_url: None,
 905         ap_id: data.inserted_post.ap_id.clone(),
 906         local: true,
 907         language_id: Default::default(),
 908         featured_community: false,
 909         featured_local: false,
 910       },
 911       community: Community {
 912         id: data.inserted_community.id,
 913         name: "test community 5".to_string(),
 914         icon: None,
 915         removed: false,
 916         deleted: false,
 917         nsfw: false,
 918         actor_id: data.inserted_community.actor_id.clone(),
 919         local: true,
 920         title: "nada".to_owned(),
 921         description: None,
 922         updated: None,
 923         banner: None,
 924         hidden: false,
 925         posting_restricted_to_mods: false,
 926         published: data.inserted_community.published,
 927         instance_id: data.inserted_instance.id,
 928         private_key: data.inserted_community.private_key.clone(),
 929         public_key: data.inserted_community.public_key.clone(),
 930         last_refreshed_at: data.inserted_community.last_refreshed_at,
 931         followers_url: data.inserted_community.followers_url.clone(),
 932         inbox_url: data.inserted_community.inbox_url.clone(),
 933         shared_inbox_url: data.inserted_community.shared_inbox_url.clone(),
 934         moderators_url: data.inserted_community.moderators_url.clone(),
 935         featured_url: data.inserted_community.featured_url.clone(),
 936       },
 937       counts: CommentAggregates {
 938         id: agg.id,
 939         comment_id: data.inserted_comment_0.id,
 940         score: 1,
 941         upvotes: 1,
 942         downvotes: 0,
 943         published: agg.published,
 944         child_count: 5,
 945         hot_rank: 1728,
 946       },
 947     }
 948   }
 949 }