crates/db_views/src/comment_view.rs

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