crates/db_views/src/comment_view.rs

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