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::{functions::hot_rank, fuzzy_search, get_conn, limit_and_offset_unlimited, 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       query = query.filter(community_block::person_id.is_null());
 316       query = query.filter(person_block::person_id.is_null());
 317     }
 318
 319     // A Max depth given means its a tree fetch
 320     let (limit, offset) = if let Some(max_depth) = self.max_depth {
 321       let depth_limit = if let Some(parent_path) = self.parent_path.as_ref() {
 322         parent_path.0.split('.').count() as i32 + max_depth
 323         // Add one because of root "0"
 324       } else {
 325         max_depth + 1
 326       };
 327
 328       query = query.filter(nlevel(comment::path).le(depth_limit));
 329
 330       // Always order by the parent path first
 331       query = query.order_by(subpath(comment::path, 0, -1));
 332
 333       // TODO limit question. Limiting does not work for comment threads ATM, only max_depth
 334       // For now, don't do any limiting for tree fetches
 335       // https://stackoverflow.com/questions/72983614/postgres-ltree-how-to-limit-the-max-number-of-children-at-any-given-level
 336
 337       // Don't use the regular error-checking one, many more comments must ofter be fetched.
 338       // This does not work for comment trees, and the limit should be manually set to a high number
 339       //
 340       // If a max depth is given, then you know its a tree fetch, and limits should be ignored
 341       (i64::MAX, 0)
 342     } else {
 343       limit_and_offset_unlimited(self.page, self.limit)
 344     };
 345
 346     query = match self.sort.unwrap_or(CommentSortType::Hot) {
 347       CommentSortType::Hot => query
 348         .then_order_by(hot_rank(comment_aggregates::score, comment_aggregates::published).desc())
 349         .then_order_by(comment_aggregates::published.desc()),
 350       CommentSortType::New => query.then_order_by(comment::published.desc()),
 351       CommentSortType::Old => query.then_order_by(comment::published.asc()),
 352       CommentSortType::Top => query.order_by(comment_aggregates::score.desc()),
 353     };
 354
 355     // Note: deleted and removed comments are done on the front side
 356     let res = query
 357       .limit(limit)
 358       .offset(offset)
 359       .load::<CommentViewTuple>(conn)
 360       .await?;
 361
 362     Ok(res.into_iter().map(CommentView::from_tuple).collect())
 363   }
 364 }
 365
 366 impl JoinView for CommentView {
 367   type JoinTuple = CommentViewTuple;
 368   fn from_tuple(a: Self::JoinTuple) -> Self {
 369     Self {
 370       comment: a.0,
 371       creator: a.1,
 372       post: a.2,
 373       community: a.3,
 374       counts: a.4,
 375       creator_banned_from_community: a.5.is_some(),
 376       subscribed: CommunityFollower::to_subscribed_type(&a.6),
 377       saved: a.7.is_some(),
 378       creator_blocked: a.8.is_some(),
 379       my_vote: a.9,
 380     }
 381   }
 382 }
 383
 384 #[cfg(test)]
 385 mod tests {
 386   use crate::comment_view::{
 387     Comment,
 388     CommentQuery,
 389     CommentSortType,
 390     CommentView,
 391     Community,
 392     DbPool,
 393     LocalUser,
 394     Person,
 395     PersonBlock,
 396     Post,
 397   };
 398   use lemmy_db_schema::{
 399     aggregates::structs::CommentAggregates,
 400     impls::actor_language::UNDETERMINED_ID,
 401     newtypes::LanguageId,
 402     source::{
 403       actor_language::LocalUserLanguage,
 404       comment::{CommentInsertForm, CommentLike, CommentLikeForm},
 405       community::CommunityInsertForm,
 406       instance::Instance,
 407       language::Language,
 408       local_user::LocalUserInsertForm,
 409       person::PersonInsertForm,
 410       person_block::PersonBlockForm,
 411       post::PostInsertForm,
 412     },
 413     traits::{Blockable, Crud, Likeable},
 414     utils::build_db_pool_for_tests,
 415     SubscribedType,
 416   };
 417   use serial_test::serial;
 418
 419   struct Data {
 420     inserted_instance: Instance,
 421     inserted_comment_0: Comment,
 422     inserted_comment_1: Comment,
 423     inserted_comment_2: Comment,
 424     inserted_post: Post,
 425     inserted_person: Person,
 426     inserted_local_user: LocalUser,
 427     inserted_person_2: Person,
 428     inserted_community: Community,
 429   }
 430
 431   async fn init_data(pool: &DbPool) -> Data {
 432     let inserted_instance = Instance::read_or_create(pool, "my_domain.tld".to_string())
 433       .await
 434       .unwrap();
 435
 436     let new_person = PersonInsertForm::builder()
 437       .name("timmy".into())
 438       .public_key("pubkey".to_string())
 439       .instance_id(inserted_instance.id)
 440       .build();
 441     let inserted_person = Person::create(pool, &new_person).await.unwrap();
 442     let local_user_form = LocalUserInsertForm::builder()
 443       .person_id(inserted_person.id)
 444       .password_encrypted(String::new())
 445       .build();
 446     let inserted_local_user = LocalUser::create(pool, &local_user_form).await.unwrap();
 447
 448     let new_person_2 = PersonInsertForm::builder()
 449       .name("sara".into())
 450       .public_key("pubkey".to_string())
 451       .instance_id(inserted_instance.id)
 452       .build();
 453     let inserted_person_2 = Person::create(pool, &new_person_2).await.unwrap();
 454
 455     let new_community = CommunityInsertForm::builder()
 456       .name("test community 5".to_string())
 457       .title("nada".to_owned())
 458       .public_key("pubkey".to_string())
 459       .instance_id(inserted_instance.id)
 460       .build();
 461
 462     let inserted_community = Community::create(pool, &new_community).await.unwrap();
 463
 464     let new_post = PostInsertForm::builder()
 465       .name("A test post 2".into())
 466       .creator_id(inserted_person.id)
 467       .community_id(inserted_community.id)
 468       .build();
 469
 470     let inserted_post = Post::create(pool, &new_post).await.unwrap();
 471     let english_id = Language::read_id_from_code(pool, Some("en")).await.unwrap();
 472
 473     // Create a comment tree with this hierarchy
 474     //       0
 475     //     \     \
 476     //    1      2
 477     //    \
 478     //  3  4
 479     //     \
 480     //     5
 481     let comment_form_0 = CommentInsertForm::builder()
 482       .content("Comment 0".into())
 483       .creator_id(inserted_person.id)
 484       .post_id(inserted_post.id)
 485       .language_id(english_id)
 486       .build();
 487
 488     let inserted_comment_0 = Comment::create(pool, &comment_form_0, None).await.unwrap();
 489
 490     let comment_form_1 = CommentInsertForm::builder()
 491       .content("Comment 1, A test blocked comment".into())
 492       .creator_id(inserted_person_2.id)
 493       .post_id(inserted_post.id)
 494       .language_id(english_id)
 495       .build();
 496
 497     let inserted_comment_1 = Comment::create(pool, &comment_form_1, Some(&inserted_comment_0.path))
 498       .await
 499       .unwrap();
 500
 501     let finnish_id = Language::read_id_from_code(pool, Some("fi")).await.unwrap();
 502     let comment_form_2 = CommentInsertForm::builder()
 503       .content("Comment 2".into())
 504       .creator_id(inserted_person.id)
 505       .post_id(inserted_post.id)
 506       .language_id(finnish_id)
 507       .build();
 508
 509     let inserted_comment_2 = Comment::create(pool, &comment_form_2, Some(&inserted_comment_0.path))
 510       .await
 511       .unwrap();
 512
 513     let comment_form_3 = CommentInsertForm::builder()
 514       .content("Comment 3".into())
 515       .creator_id(inserted_person.id)
 516       .post_id(inserted_post.id)
 517       .language_id(english_id)
 518       .build();
 519
 520     let _inserted_comment_3 =
 521       Comment::create(pool, &comment_form_3, Some(&inserted_comment_1.path))
 522         .await
 523         .unwrap();
 524
 525     let polish_id = Language::read_id_from_code(pool, Some("pl"))
 526       .await
 527       .unwrap()
 528       .unwrap();
 529     let comment_form_4 = CommentInsertForm::builder()
 530       .content("Comment 4".into())
 531       .creator_id(inserted_person.id)
 532       .post_id(inserted_post.id)
 533       .language_id(Some(polish_id))
 534       .build();
 535
 536     let inserted_comment_4 = Comment::create(pool, &comment_form_4, Some(&inserted_comment_1.path))
 537       .await
 538       .unwrap();
 539
 540     let comment_form_5 = CommentInsertForm::builder()
 541       .content("Comment 5".into())
 542       .creator_id(inserted_person.id)
 543       .post_id(inserted_post.id)
 544       .build();
 545
 546     let _inserted_comment_5 =
 547       Comment::create(pool, &comment_form_5, Some(&inserted_comment_4.path))
 548         .await
 549         .unwrap();
 550
 551     let timmy_blocks_sara_form = PersonBlockForm {
 552       person_id: inserted_person.id,
 553       target_id: inserted_person_2.id,
 554     };
 555
 556     let inserted_block = PersonBlock::block(pool, &timmy_blocks_sara_form)
 557       .await
 558       .unwrap();
 559
 560     let expected_block = PersonBlock {
 561       id: inserted_block.id,
 562       person_id: inserted_person.id,
 563       target_id: inserted_person_2.id,
 564       published: inserted_block.published,
 565     };
 566     assert_eq!(expected_block, inserted_block);
 567
 568     let comment_like_form = CommentLikeForm {
 569       comment_id: inserted_comment_0.id,
 570       post_id: inserted_post.id,
 571       person_id: inserted_person.id,
 572       score: 1,
 573     };
 574
 575     let _inserted_comment_like = CommentLike::like(pool, &comment_like_form).await.unwrap();
 576
 577     Data {
 578       inserted_instance,
 579       inserted_comment_0,
 580       inserted_comment_1,
 581       inserted_comment_2,
 582       inserted_post,
 583       inserted_person,
 584       inserted_local_user,
 585       inserted_person_2,
 586       inserted_community,
 587     }
 588   }
 589
 590   #[tokio::test]
 591   #[serial]
 592   async fn test_crud() {
 593     let pool = &build_db_pool_for_tests().await;
 594     let data = init_data(pool).await;
 595
 596     let expected_comment_view_no_person = expected_comment_view(&data, pool).await;
 597
 598     let mut expected_comment_view_with_person = expected_comment_view_no_person.clone();
 599     expected_comment_view_with_person.my_vote = Some(1);
 600
 601     let read_comment_views_no_person = CommentQuery::builder()
 602       .pool(pool)
 603       .sort(Some(CommentSortType::Hot))
 604       .post_id(Some(data.inserted_post.id))
 605       .build()
 606       .list()
 607       .await
 608       .unwrap();
 609
 610     assert_eq!(
 611       expected_comment_view_no_person,
 612       read_comment_views_no_person[0]
 613     );
 614
 615     let read_comment_views_with_person = CommentQuery::builder()
 616       .pool(pool)
 617       .sort(Some(CommentSortType::Hot))
 618       .post_id(Some(data.inserted_post.id))
 619       .local_user(Some(&data.inserted_local_user))
 620       .build()
 621       .list()
 622       .await
 623       .unwrap();
 624
 625     assert_eq!(
 626       expected_comment_view_with_person,
 627       read_comment_views_with_person[0]
 628     );
 629
 630     // Make sure its 1, not showing the blocked comment
 631     assert_eq!(5, read_comment_views_with_person.len());
 632
 633     let read_comment_from_blocked_person = CommentView::read(
 634       pool,
 635       data.inserted_comment_1.id,
 636       Some(data.inserted_person.id),
 637     )
 638     .await
 639     .unwrap();
 640
 641     // Make sure block set the creator blocked
 642     assert!(read_comment_from_blocked_person.creator_blocked);
 643
 644     cleanup(data, pool).await;
 645   }
 646
 647   #[tokio::test]
 648   #[serial]
 649   async fn test_comment_tree() {
 650     let pool = &build_db_pool_for_tests().await;
 651     let data = init_data(pool).await;
 652
 653     let top_path = data.inserted_comment_0.path.clone();
 654     let read_comment_views_top_path = CommentQuery::builder()
 655       .pool(pool)
 656       .post_id(Some(data.inserted_post.id))
 657       .parent_path(Some(top_path))
 658       .build()
 659       .list()
 660       .await
 661       .unwrap();
 662
 663     let child_path = data.inserted_comment_1.path.clone();
 664     let read_comment_views_child_path = CommentQuery::builder()
 665       .pool(pool)
 666       .post_id(Some(data.inserted_post.id))
 667       .parent_path(Some(child_path))
 668       .build()
 669       .list()
 670       .await
 671       .unwrap();
 672
 673     // Make sure the comment parent-limited fetch is correct
 674     assert_eq!(6, read_comment_views_top_path.len());
 675     assert_eq!(4, read_comment_views_child_path.len());
 676
 677     // Make sure it contains the parent, but not the comment from the other tree
 678     let child_comments = read_comment_views_child_path
 679       .into_iter()
 680       .map(|c| c.comment)
 681       .collect::<Vec<Comment>>();
 682     assert!(child_comments.contains(&data.inserted_comment_1));
 683     assert!(!child_comments.contains(&data.inserted_comment_2));
 684
 685     let read_comment_views_top_max_depth = CommentQuery::builder()
 686       .pool(pool)
 687       .post_id(Some(data.inserted_post.id))
 688       .max_depth(Some(1))
 689       .build()
 690       .list()
 691       .await
 692       .unwrap();
 693
 694     // Make sure a depth limited one only has the top comment
 695     assert_eq!(
 696       expected_comment_view(&data, pool).await,
 697       read_comment_views_top_max_depth[0]
 698     );
 699     assert_eq!(1, read_comment_views_top_max_depth.len());
 700
 701     let child_path = data.inserted_comment_1.path.clone();
 702     let read_comment_views_parent_max_depth = CommentQuery::builder()
 703       .pool(pool)
 704       .post_id(Some(data.inserted_post.id))
 705       .parent_path(Some(child_path))
 706       .max_depth(Some(1))
 707       .sort(Some(CommentSortType::New))
 708       .build()
 709       .list()
 710       .await
 711       .unwrap();
 712
 713     // Make sure a depth limited one, and given child comment 1, has 3
 714     assert!(read_comment_views_parent_max_depth[2]
 715       .comment
 716       .content
 717       .eq("Comment 3"));
 718     assert_eq!(3, read_comment_views_parent_max_depth.len());
 719
 720     cleanup(data, pool).await;
 721   }
 722
 723   #[tokio::test]
 724   #[serial]
 725   async fn test_languages() {
 726     let pool = &build_db_pool_for_tests().await;
 727     let data = init_data(pool).await;
 728
 729     // by default, user has all languages enabled and should see all comments
 730     // (except from blocked user)
 731     let all_languages = CommentQuery::builder()
 732       .pool(pool)
 733       .local_user(Some(&data.inserted_local_user))
 734       .build()
 735       .list()
 736       .await
 737       .unwrap();
 738     assert_eq!(5, all_languages.len());
 739
 740     // change user lang to finnish, should only show one post in finnish and one undetermined
 741     let finnish_id = Language::read_id_from_code(pool, Some("fi"))
 742       .await
 743       .unwrap()
 744       .unwrap();
 745     LocalUserLanguage::update(pool, vec![finnish_id], data.inserted_local_user.id)
 746       .await
 747       .unwrap();
 748     let finnish_comments = CommentQuery::builder()
 749       .pool(pool)
 750       .local_user(Some(&data.inserted_local_user))
 751       .build()
 752       .list()
 753       .await
 754       .unwrap();
 755     assert_eq!(2, finnish_comments.len());
 756     let finnish_comment = finnish_comments
 757       .iter()
 758       .find(|c| c.comment.language_id == finnish_id);
 759     assert!(finnish_comment.is_some());
 760     assert_eq!(
 761       data.inserted_comment_2.content,
 762       finnish_comment.unwrap().comment.content
 763     );
 764
 765     // now show all comments with undetermined language (which is the default value)
 766     LocalUserLanguage::update(pool, vec![UNDETERMINED_ID], data.inserted_local_user.id)
 767       .await
 768       .unwrap();
 769     let undetermined_comment = CommentQuery::builder()
 770       .pool(pool)
 771       .local_user(Some(&data.inserted_local_user))
 772       .build()
 773       .list()
 774       .await
 775       .unwrap();
 776     assert_eq!(1, undetermined_comment.len());
 777
 778     cleanup(data, pool).await;
 779   }
 780
 781   async fn cleanup(data: Data, pool: &DbPool) {
 782     CommentLike::remove(pool, data.inserted_person.id, data.inserted_comment_0.id)
 783       .await
 784       .unwrap();
 785     Comment::delete(pool, data.inserted_comment_0.id)
 786       .await
 787       .unwrap();
 788     Comment::delete(pool, data.inserted_comment_1.id)
 789       .await
 790       .unwrap();
 791     Post::delete(pool, data.inserted_post.id).await.unwrap();
 792     Community::delete(pool, data.inserted_community.id)
 793       .await
 794       .unwrap();
 795     Person::delete(pool, data.inserted_person.id).await.unwrap();
 796     Person::delete(pool, data.inserted_person_2.id)
 797       .await
 798       .unwrap();
 799     Instance::delete(pool, data.inserted_instance.id)
 800       .await
 801       .unwrap();
 802   }
 803
 804   async fn expected_comment_view(data: &Data, pool: &DbPool) -> CommentView {
 805     let agg = CommentAggregates::read(pool, data.inserted_comment_0.id)
 806       .await
 807       .unwrap();
 808     CommentView {
 809       creator_banned_from_community: false,
 810       my_vote: None,
 811       subscribed: SubscribedType::NotSubscribed,
 812       saved: false,
 813       creator_blocked: false,
 814       comment: Comment {
 815         id: data.inserted_comment_0.id,
 816         content: "Comment 0".into(),
 817         creator_id: data.inserted_person.id,
 818         post_id: data.inserted_post.id,
 819         removed: false,
 820         deleted: false,
 821         published: data.inserted_comment_0.published,
 822         ap_id: data.inserted_comment_0.ap_id.clone(),
 823         updated: None,
 824         local: true,
 825         distinguished: false,
 826         path: data.inserted_comment_0.clone().path,
 827         language_id: LanguageId(37),
 828       },
 829       creator: Person {
 830         id: data.inserted_person.id,
 831         name: "timmy".into(),
 832         display_name: None,
 833         published: data.inserted_person.published,
 834         avatar: None,
 835         actor_id: data.inserted_person.actor_id.clone(),
 836         local: true,
 837         banned: false,
 838         deleted: false,
 839         admin: false,
 840         bot_account: false,
 841         bio: None,
 842         banner: None,
 843         updated: None,
 844         inbox_url: data.inserted_person.inbox_url.clone(),
 845         shared_inbox_url: None,
 846         matrix_user_id: None,
 847         ban_expires: None,
 848         instance_id: data.inserted_instance.id,
 849         private_key: data.inserted_person.private_key.clone(),
 850         public_key: data.inserted_person.public_key.clone(),
 851         last_refreshed_at: data.inserted_person.last_refreshed_at,
 852       },
 853       post: Post {
 854         id: data.inserted_post.id,
 855         name: data.inserted_post.name.clone(),
 856         creator_id: data.inserted_person.id,
 857         url: None,
 858         body: None,
 859         published: data.inserted_post.published,
 860         updated: None,
 861         community_id: data.inserted_community.id,
 862         removed: false,
 863         deleted: false,
 864         locked: false,
 865         nsfw: false,
 866         embed_title: None,
 867         embed_description: None,
 868         embed_video_url: None,
 869         thumbnail_url: None,
 870         ap_id: data.inserted_post.ap_id.clone(),
 871         local: true,
 872         language_id: Default::default(),
 873         featured_community: false,
 874         featured_local: false,
 875       },
 876       community: Community {
 877         id: data.inserted_community.id,
 878         name: "test community 5".to_string(),
 879         icon: None,
 880         removed: false,
 881         deleted: false,
 882         nsfw: false,
 883         actor_id: data.inserted_community.actor_id.clone(),
 884         local: true,
 885         title: "nada".to_owned(),
 886         description: None,
 887         updated: None,
 888         banner: None,
 889         hidden: false,
 890         posting_restricted_to_mods: false,
 891         published: data.inserted_community.published,
 892         instance_id: data.inserted_instance.id,
 893         private_key: data.inserted_community.private_key.clone(),
 894         public_key: data.inserted_community.public_key.clone(),
 895         last_refreshed_at: data.inserted_community.last_refreshed_at,
 896         followers_url: data.inserted_community.followers_url.clone(),
 897         inbox_url: data.inserted_community.inbox_url.clone(),
 898         shared_inbox_url: data.inserted_community.shared_inbox_url.clone(),
 899         moderators_url: data.inserted_community.moderators_url.clone(),
 900         featured_url: data.inserted_community.featured_url.clone(),
 901       },
 902       counts: CommentAggregates {
 903         id: agg.id,
 904         comment_id: data.inserted_comment_0.id,
 905         score: 1,
 906         upvotes: 1,
 907         downvotes: 0,
 908         published: agg.published,
 909         child_count: 5,
 910       },
 911     }
 912   }
 913 }