crates/db_views/src/post_view.rs

   1 use crate::structs::PostView;
   2 use diesel::{dsl::*, pg::Pg, result::Error, *};
   3 use lemmy_db_schema::{
   4   aggregates::structs::PostAggregates,
   5   newtypes::{CommunityId, DbUrl, LocalUserId, PersonId, PostId},
   6   schema::{
   7     community,
   8     community_block,
   9     community_follower,
  10     community_person_ban,
  11     local_user_language,
  12     person,
  13     person_block,
  14     person_post_aggregates,
  15     post,
  16     post_aggregates,
  17     post_like,
  18     post_read,
  19     post_saved,
  20   },
  21   source::{
  22     community::{Community, CommunityFollower, CommunityPersonBan, CommunitySafe},
  23     local_user::LocalUser,
  24     person::{Person, PersonSafe},
  25     person_block::PersonBlock,
  26     post::{Post, PostRead, PostSaved},
  27   },
  28   traits::{ToSafe, ViewToVec},
  29   utils::{functions::hot_rank, fuzzy_search, limit_and_offset},
  30   ListingType,
  31   SortType,
  32 };
  33 use tracing::debug;
  34 use typed_builder::TypedBuilder;
  35
  36 type PostViewTuple = (
  37   Post,
  38   PersonSafe,
  39   CommunitySafe,
  40   Option<CommunityPersonBan>,
  41   PostAggregates,
  42   Option<CommunityFollower>,
  43   Option<PostSaved>,
  44   Option<PostRead>,
  45   Option<PersonBlock>,
  46   Option<i16>,
  47   i64,
  48 );
  49
  50 sql_function!(fn coalesce(x: sql_types::Nullable<sql_types::BigInt>, y: sql_types::BigInt) -> sql_types::BigInt);
  51
  52 impl PostView {
  53   pub fn read(
  54     conn: &mut PgConnection,
  55     post_id: PostId,
  56     my_person_id: Option<PersonId>,
  57   ) -> Result<Self, Error> {
  58     // The left join below will return None in this case
  59     let person_id_join = my_person_id.unwrap_or(PersonId(-1));
  60     let (
  61       post,
  62       creator,
  63       community,
  64       creator_banned_from_community,
  65       counts,
  66       follower,
  67       saved,
  68       read,
  69       creator_blocked,
  70       post_like,
  71       unread_comments,
  72     ) = post::table
  73       .find(post_id)
  74       .inner_join(person::table)
  75       .inner_join(community::table)
  76       .left_join(
  77         community_person_ban::table.on(
  78           post::community_id
  79             .eq(community_person_ban::community_id)
  80             .and(community_person_ban::person_id.eq(post::creator_id))
  81             .and(
  82               community_person_ban::expires
  83                 .is_null()
  84                 .or(community_person_ban::expires.gt(now)),
  85             ),
  86         ),
  87       )
  88       .inner_join(post_aggregates::table)
  89       .left_join(
  90         community_follower::table.on(
  91           post::community_id
  92             .eq(community_follower::community_id)
  93             .and(community_follower::person_id.eq(person_id_join)),
  94         ),
  95       )
  96       .left_join(
  97         post_saved::table.on(
  98           post::id
  99             .eq(post_saved::post_id)
 100             .and(post_saved::person_id.eq(person_id_join)),
 101         ),
 102       )
 103       .left_join(
 104         post_read::table.on(
 105           post::id
 106             .eq(post_read::post_id)
 107             .and(post_read::person_id.eq(person_id_join)),
 108         ),
 109       )
 110       .left_join(
 111         person_block::table.on(
 112           post::creator_id
 113             .eq(person_block::target_id)
 114             .and(person_block::person_id.eq(person_id_join)),
 115         ),
 116       )
 117       .left_join(
 118         post_like::table.on(
 119           post::id
 120             .eq(post_like::post_id)
 121             .and(post_like::person_id.eq(person_id_join)),
 122         ),
 123       )
 124       .left_join(
 125         person_post_aggregates::table.on(
 126           post::id
 127             .eq(person_post_aggregates::post_id)
 128             .and(person_post_aggregates::person_id.eq(person_id_join)),
 129         ),
 130       )
 131       .select((
 132         post::all_columns,
 133         Person::safe_columns_tuple(),
 134         Community::safe_columns_tuple(),
 135         community_person_ban::all_columns.nullable(),
 136         post_aggregates::all_columns,
 137         community_follower::all_columns.nullable(),
 138         post_saved::all_columns.nullable(),
 139         post_read::all_columns.nullable(),
 140         person_block::all_columns.nullable(),
 141         post_like::score.nullable(),
 142         coalesce(
 143           post_aggregates::comments.nullable() - person_post_aggregates::read_comments.nullable(),
 144           post_aggregates::comments,
 145         ),
 146       ))
 147       .first::<PostViewTuple>(conn)?;
 148
 149     // If a person is given, then my_vote, if None, should be 0, not null
 150     // Necessary to differentiate between other person's votes
 151     let my_vote = if my_person_id.is_some() && post_like.is_none() {
 152       Some(0)
 153     } else {
 154       post_like
 155     };
 156
 157     Ok(PostView {
 158       post,
 159       creator,
 160       community,
 161       creator_banned_from_community: creator_banned_from_community.is_some(),
 162       counts,
 163       subscribed: CommunityFollower::to_subscribed_type(&follower),
 164       saved: saved.is_some(),
 165       read: read.is_some(),
 166       creator_blocked: creator_blocked.is_some(),
 167       my_vote,
 168       unread_comments,
 169     })
 170   }
 171 }
 172
 173 #[derive(TypedBuilder)]
 174 #[builder(field_defaults(default))]
 175 pub struct PostQuery<'a> {
 176   #[builder(!default)]
 177   conn: &'a mut PgConnection,
 178   listing_type: Option<ListingType>,
 179   sort: Option<SortType>,
 180   creator_id: Option<PersonId>,
 181   community_id: Option<CommunityId>,
 182   community_actor_id: Option<DbUrl>,
 183   local_user: Option<&'a LocalUser>,
 184   search_term: Option<String>,
 185   url_search: Option<String>,
 186   saved_only: Option<bool>,
 187   page: Option<i64>,
 188   limit: Option<i64>,
 189 }
 190
 191 impl<'a> PostQuery<'a> {
 192   pub fn list(self) -> Result<Vec<PostView>, Error> {
 193     use diesel::dsl::*;
 194
 195     // The left join below will return None in this case
 196     let person_id_join = self.local_user.map(|l| l.person_id).unwrap_or(PersonId(-1));
 197     let local_user_id_join = self.local_user.map(|l| l.id).unwrap_or(LocalUserId(-1));
 198
 199     let mut query = post::table
 200       .inner_join(person::table)
 201       .inner_join(community::table)
 202       .left_join(
 203         community_person_ban::table.on(
 204           post::community_id
 205             .eq(community_person_ban::community_id)
 206             .and(community_person_ban::person_id.eq(post::creator_id))
 207             .and(
 208               community_person_ban::expires
 209                 .is_null()
 210                 .or(community_person_ban::expires.gt(now)),
 211             ),
 212         ),
 213       )
 214       .inner_join(post_aggregates::table)
 215       .left_join(
 216         community_follower::table.on(
 217           post::community_id
 218             .eq(community_follower::community_id)
 219             .and(community_follower::person_id.eq(person_id_join)),
 220         ),
 221       )
 222       .left_join(
 223         post_saved::table.on(
 224           post::id
 225             .eq(post_saved::post_id)
 226             .and(post_saved::person_id.eq(person_id_join)),
 227         ),
 228       )
 229       .left_join(
 230         post_read::table.on(
 231           post::id
 232             .eq(post_read::post_id)
 233             .and(post_read::person_id.eq(person_id_join)),
 234         ),
 235       )
 236       .left_join(
 237         person_block::table.on(
 238           post::creator_id
 239             .eq(person_block::target_id)
 240             .and(person_block::person_id.eq(person_id_join)),
 241         ),
 242       )
 243       .left_join(
 244         community_block::table.on(
 245           community::id
 246             .eq(community_block::community_id)
 247             .and(community_block::person_id.eq(person_id_join)),
 248         ),
 249       )
 250       .left_join(
 251         post_like::table.on(
 252           post::id
 253             .eq(post_like::post_id)
 254             .and(post_like::person_id.eq(person_id_join)),
 255         ),
 256       )
 257       .left_join(
 258         person_post_aggregates::table.on(
 259           post::id
 260             .eq(person_post_aggregates::post_id)
 261             .and(person_post_aggregates::person_id.eq(person_id_join)),
 262         ),
 263       )
 264       .left_join(
 265         local_user_language::table.on(
 266           post::language_id
 267             .eq(local_user_language::language_id)
 268             .and(local_user_language::local_user_id.eq(local_user_id_join)),
 269         ),
 270       )
 271       .select((
 272         post::all_columns,
 273         Person::safe_columns_tuple(),
 274         Community::safe_columns_tuple(),
 275         community_person_ban::all_columns.nullable(),
 276         post_aggregates::all_columns,
 277         community_follower::all_columns.nullable(),
 278         post_saved::all_columns.nullable(),
 279         post_read::all_columns.nullable(),
 280         person_block::all_columns.nullable(),
 281         post_like::score.nullable(),
 282         coalesce(
 283           post_aggregates::comments.nullable() - person_post_aggregates::read_comments.nullable(),
 284           post_aggregates::comments,
 285         ),
 286       ))
 287       .into_boxed();
 288
 289     if let Some(listing_type) = self.listing_type {
 290       match listing_type {
 291         ListingType::Subscribed => {
 292           query = query.filter(community_follower::person_id.is_not_null())
 293         }
 294         ListingType::Local => {
 295           query = query.filter(community::local.eq(true)).filter(
 296             community::hidden
 297               .eq(false)
 298               .or(community_follower::person_id.eq(person_id_join)),
 299           );
 300         }
 301         ListingType::All => {
 302           query = query.filter(
 303             community::hidden
 304               .eq(false)
 305               .or(community_follower::person_id.eq(person_id_join)),
 306           )
 307         }
 308       }
 309     }
 310
 311     if let Some(community_id) = self.community_id {
 312       query = query
 313         .filter(post::community_id.eq(community_id))
 314         .then_order_by(post_aggregates::stickied.desc());
 315     }
 316
 317     if let Some(community_actor_id) = self.community_actor_id {
 318       query = query
 319         .filter(community::actor_id.eq(community_actor_id))
 320         .then_order_by(post_aggregates::stickied.desc());
 321     }
 322
 323     if let Some(url_search) = self.url_search {
 324       query = query.filter(post::url.eq(url_search));
 325     }
 326
 327     if let Some(search_term) = self.search_term {
 328       let searcher = fuzzy_search(&search_term);
 329       query = query.filter(
 330         post::name
 331           .ilike(searcher.to_owned())
 332           .or(post::body.ilike(searcher)),
 333       );
 334     }
 335
 336     // If its for a specific person, show the removed / deleted
 337     if let Some(creator_id) = self.creator_id {
 338       query = query.filter(post::creator_id.eq(creator_id));
 339     }
 340
 341     if !self.local_user.map(|l| l.show_nsfw).unwrap_or(false) {
 342       query = query
 343         .filter(post::nsfw.eq(false))
 344         .filter(community::nsfw.eq(false));
 345     };
 346
 347     if !self.local_user.map(|l| l.show_bot_accounts).unwrap_or(true) {
 348       query = query.filter(person::bot_account.eq(false));
 349     };
 350
 351     if self.saved_only.unwrap_or(false) {
 352       query = query.filter(post_saved::id.is_not_null());
 353     }
 354     // Only hide the read posts, if the saved_only is false. Otherwise ppl with the hide_read
 355     // setting wont be able to see saved posts.
 356     else if !self.local_user.map(|l| l.show_read_posts).unwrap_or(true) {
 357       query = query.filter(post_read::id.is_null());
 358     }
 359
 360     if self.local_user.is_some() {
 361       // Filter out the rows with missing languages
 362       query = query.filter(local_user_language::id.is_not_null());
 363
 364       // Don't show blocked communities or persons
 365       query = query.filter(community_block::person_id.is_null());
 366       query = query.filter(person_block::person_id.is_null());
 367     }
 368
 369     query = match self.sort.unwrap_or(SortType::Hot) {
 370       SortType::Active => query
 371         .then_order_by(
 372           hot_rank(
 373             post_aggregates::score,
 374             post_aggregates::newest_comment_time_necro,
 375           )
 376           .desc(),
 377         )
 378         .then_order_by(post_aggregates::newest_comment_time_necro.desc()),
 379       SortType::Hot => query
 380         .then_order_by(hot_rank(post_aggregates::score, post_aggregates::published).desc())
 381         .then_order_by(post_aggregates::published.desc()),
 382       SortType::New => query.then_order_by(post_aggregates::published.desc()),
 383       SortType::Old => query.then_order_by(post_aggregates::published.asc()),
 384       SortType::NewComments => query.then_order_by(post_aggregates::newest_comment_time.desc()),
 385       SortType::MostComments => query
 386         .then_order_by(post_aggregates::comments.desc())
 387         .then_order_by(post_aggregates::published.desc()),
 388       SortType::TopAll => query
 389         .then_order_by(post_aggregates::score.desc())
 390         .then_order_by(post_aggregates::published.desc()),
 391       SortType::TopYear => query
 392         .filter(post_aggregates::published.gt(now - 1.years()))
 393         .then_order_by(post_aggregates::score.desc())
 394         .then_order_by(post_aggregates::published.desc()),
 395       SortType::TopMonth => query
 396         .filter(post_aggregates::published.gt(now - 1.months()))
 397         .then_order_by(post_aggregates::score.desc())
 398         .then_order_by(post_aggregates::published.desc()),
 399       SortType::TopWeek => query
 400         .filter(post_aggregates::published.gt(now - 1.weeks()))
 401         .then_order_by(post_aggregates::score.desc())
 402         .then_order_by(post_aggregates::published.desc()),
 403       SortType::TopDay => query
 404         .filter(post_aggregates::published.gt(now - 1.days()))
 405         .then_order_by(post_aggregates::score.desc())
 406         .then_order_by(post_aggregates::published.desc()),
 407     };
 408
 409     let (limit, offset) = limit_and_offset(self.page, self.limit)?;
 410
 411     query = query
 412       .limit(limit)
 413       .offset(offset)
 414       .filter(post::removed.eq(false))
 415       .filter(post::deleted.eq(false))
 416       .filter(community::removed.eq(false))
 417       .filter(community::deleted.eq(false));
 418
 419     debug!("Post View Query: {:?}", debug_query::<Pg, _>(&query));
 420
 421     let res = query.load::<PostViewTuple>(self.conn)?;
 422
 423     Ok(PostView::from_tuple_to_vec(res))
 424   }
 425 }
 426
 427 impl ViewToVec for PostView {
 428   type DbTuple = PostViewTuple;
 429   fn from_tuple_to_vec(items: Vec<Self::DbTuple>) -> Vec<Self> {
 430     items
 431       .into_iter()
 432       .map(|a| Self {
 433         post: a.0,
 434         creator: a.1,
 435         community: a.2,
 436         creator_banned_from_community: a.3.is_some(),
 437         counts: a.4,
 438         subscribed: CommunityFollower::to_subscribed_type(&a.5),
 439         saved: a.6.is_some(),
 440         read: a.7.is_some(),
 441         creator_blocked: a.8.is_some(),
 442         my_vote: a.9,
 443         unread_comments: a.10,
 444       })
 445       .collect::<Vec<Self>>()
 446   }
 447 }
 448
 449 #[cfg(test)]
 450 mod tests {
 451   use crate::post_view::{PostQuery, PostView};
 452   use diesel::PgConnection;
 453   use lemmy_db_schema::{
 454     aggregates::structs::PostAggregates,
 455     newtypes::LanguageId,
 456     source::{
 457       community::*,
 458       community_block::{CommunityBlock, CommunityBlockForm},
 459       language::Language,
 460       local_user::{LocalUser, LocalUserForm},
 461       local_user_language::LocalUserLanguage,
 462       person::*,
 463       person_block::{PersonBlock, PersonBlockForm},
 464       post::*,
 465     },
 466     traits::{Blockable, Crud, Likeable},
 467     utils::establish_unpooled_connection,
 468     SortType,
 469     SubscribedType,
 470   };
 471   use serial_test::serial;
 472
 473   struct Data {
 474     inserted_person: Person,
 475     inserted_local_user: LocalUser,
 476     inserted_blocked_person: Person,
 477     inserted_bot: Person,
 478     inserted_community: Community,
 479     inserted_post: Post,
 480   }
 481
 482   fn init_data(conn: &mut PgConnection) -> Data {
 483     let person_name = "tegan".to_string();
 484
 485     let new_person = PersonForm {
 486       name: person_name.to_owned(),
 487       public_key: Some("pubkey".to_string()),
 488       ..PersonForm::default()
 489     };
 490
 491     let inserted_person = Person::create(conn, &new_person).unwrap();
 492
 493     let local_user_form = LocalUserForm {
 494       person_id: Some(inserted_person.id),
 495       password_encrypted: Some("".to_string()),
 496       ..Default::default()
 497     };
 498     let inserted_local_user = LocalUser::create(conn, &local_user_form).unwrap();
 499
 500     let new_bot = PersonForm {
 501       name: "mybot".to_string(),
 502       bot_account: Some(true),
 503       public_key: Some("pubkey".to_string()),
 504       ..PersonForm::default()
 505     };
 506
 507     let inserted_bot = Person::create(conn, &new_bot).unwrap();
 508
 509     let new_community = CommunityForm {
 510       name: "test_community_3".to_string(),
 511       title: "nada".to_owned(),
 512       public_key: Some("pubkey".to_string()),
 513       ..CommunityForm::default()
 514     };
 515
 516     let inserted_community = Community::create(conn, &new_community).unwrap();
 517
 518     // Test a person block, make sure the post query doesn't include their post
 519     let blocked_person = PersonForm {
 520       name: person_name,
 521       public_key: Some("pubkey".to_string()),
 522       ..PersonForm::default()
 523     };
 524
 525     let inserted_blocked_person = Person::create(conn, &blocked_person).unwrap();
 526
 527     let post_from_blocked_person = PostForm {
 528       name: "blocked_person_post".to_string(),
 529       creator_id: inserted_blocked_person.id,
 530       community_id: inserted_community.id,
 531       language_id: Some(LanguageId(1)),
 532       ..PostForm::default()
 533     };
 534
 535     Post::create(conn, &post_from_blocked_person).unwrap();
 536
 537     // block that person
 538     let person_block = PersonBlockForm {
 539       person_id: inserted_person.id,
 540       target_id: inserted_blocked_person.id,
 541     };
 542
 543     PersonBlock::block(conn, &person_block).unwrap();
 544
 545     // A sample post
 546     let new_post = PostForm {
 547       name: "test post 3".to_string(),
 548       creator_id: inserted_person.id,
 549       community_id: inserted_community.id,
 550       language_id: Some(LanguageId(47)),
 551       ..PostForm::default()
 552     };
 553
 554     let inserted_post = Post::create(conn, &new_post).unwrap();
 555
 556     let new_bot_post = PostForm {
 557       name: "test bot post".to_string(),
 558       creator_id: inserted_bot.id,
 559       community_id: inserted_community.id,
 560       ..PostForm::default()
 561     };
 562
 563     let _inserted_bot_post = Post::create(conn, &new_bot_post).unwrap();
 564
 565     Data {
 566       inserted_person,
 567       inserted_local_user,
 568       inserted_blocked_person,
 569       inserted_bot,
 570       inserted_community,
 571       inserted_post,
 572     }
 573   }
 574
 575   #[test]
 576   #[serial]
 577   fn post_listing_with_person() {
 578     let conn = &mut establish_unpooled_connection();
 579     let data = init_data(conn);
 580
 581     let local_user_form = LocalUserForm {
 582       show_bot_accounts: Some(false),
 583       ..Default::default()
 584     };
 585     let inserted_local_user =
 586       LocalUser::update(conn, data.inserted_local_user.id, &local_user_form).unwrap();
 587
 588     let read_post_listing = PostQuery::builder()
 589       .conn(conn)
 590       .sort(Some(SortType::New))
 591       .community_id(Some(data.inserted_community.id))
 592       .local_user(Some(&inserted_local_user))
 593       .build()
 594       .list()
 595       .unwrap();
 596
 597     let post_listing_single_with_person =
 598       PostView::read(conn, data.inserted_post.id, Some(data.inserted_person.id)).unwrap();
 599
 600     let mut expected_post_listing_with_user = expected_post_view(&data, conn);
 601
 602     // Should be only one person, IE the bot post, and blocked should be missing
 603     assert_eq!(1, read_post_listing.len());
 604
 605     assert_eq!(expected_post_listing_with_user, read_post_listing[0]);
 606     expected_post_listing_with_user.my_vote = Some(0);
 607     assert_eq!(
 608       expected_post_listing_with_user,
 609       post_listing_single_with_person
 610     );
 611
 612     let local_user_form = LocalUserForm {
 613       show_bot_accounts: Some(true),
 614       ..Default::default()
 615     };
 616     let inserted_local_user =
 617       LocalUser::update(conn, data.inserted_local_user.id, &local_user_form).unwrap();
 618
 619     let post_listings_with_bots = PostQuery::builder()
 620       .conn(conn)
 621       .sort(Some(SortType::New))
 622       .community_id(Some(data.inserted_community.id))
 623       .local_user(Some(&inserted_local_user))
 624       .build()
 625       .list()
 626       .unwrap();
 627     // should include bot post which has "undetermined" language
 628     assert_eq!(2, post_listings_with_bots.len());
 629
 630     cleanup(data, conn);
 631   }
 632
 633   #[test]
 634   #[serial]
 635   fn post_listing_no_person() {
 636     let conn = &mut establish_unpooled_connection();
 637     let data = init_data(conn);
 638
 639     let read_post_listing_multiple_no_person = PostQuery::builder()
 640       .conn(conn)
 641       .sort(Some(SortType::New))
 642       .community_id(Some(data.inserted_community.id))
 643       .build()
 644       .list()
 645       .unwrap();
 646
 647     let read_post_listing_single_no_person =
 648       PostView::read(conn, data.inserted_post.id, None).unwrap();
 649
 650     let expected_post_listing_no_person = expected_post_view(&data, conn);
 651
 652     // Should be 2 posts, with the bot post, and the blocked
 653     assert_eq!(3, read_post_listing_multiple_no_person.len());
 654
 655     assert_eq!(
 656       expected_post_listing_no_person,
 657       read_post_listing_multiple_no_person[1]
 658     );
 659     assert_eq!(
 660       expected_post_listing_no_person,
 661       read_post_listing_single_no_person
 662     );
 663
 664     cleanup(data, conn);
 665   }
 666
 667   #[test]
 668   #[serial]
 669   fn post_listing_block_community() {
 670     let conn = &mut establish_unpooled_connection();
 671     let data = init_data(conn);
 672
 673     let community_block = CommunityBlockForm {
 674       person_id: data.inserted_person.id,
 675       community_id: data.inserted_community.id,
 676     };
 677     CommunityBlock::block(conn, &community_block).unwrap();
 678
 679     let read_post_listings_with_person_after_block = PostQuery::builder()
 680       .conn(conn)
 681       .sort(Some(SortType::New))
 682       .community_id(Some(data.inserted_community.id))
 683       .local_user(Some(&data.inserted_local_user))
 684       .build()
 685       .list()
 686       .unwrap();
 687     // Should be 0 posts after the community block
 688     assert_eq!(0, read_post_listings_with_person_after_block.len());
 689
 690     CommunityBlock::unblock(conn, &community_block).unwrap();
 691     cleanup(data, conn);
 692   }
 693
 694   #[test]
 695   #[serial]
 696   fn post_listing_like() {
 697     let conn = &mut establish_unpooled_connection();
 698     let data = init_data(conn);
 699
 700     let post_like_form = PostLikeForm {
 701       post_id: data.inserted_post.id,
 702       person_id: data.inserted_person.id,
 703       score: 1,
 704     };
 705
 706     let inserted_post_like = PostLike::like(conn, &post_like_form).unwrap();
 707
 708     let expected_post_like = PostLike {
 709       id: inserted_post_like.id,
 710       post_id: data.inserted_post.id,
 711       person_id: data.inserted_person.id,
 712       published: inserted_post_like.published,
 713       score: 1,
 714     };
 715     assert_eq!(expected_post_like, inserted_post_like);
 716
 717     let like_removed =
 718       PostLike::remove(conn, data.inserted_person.id, data.inserted_post.id).unwrap();
 719     assert_eq!(1, like_removed);
 720     cleanup(data, conn);
 721   }
 722
 723   #[test]
 724   #[serial]
 725   fn post_listing_person_language() {
 726     let conn = &mut establish_unpooled_connection();
 727     let data = init_data(conn);
 728
 729     let spanish_id = Language::read_id_from_code(conn, "es").unwrap();
 730     let post_spanish = PostForm {
 731       name: "asffgdsc".to_string(),
 732       creator_id: data.inserted_person.id,
 733       community_id: data.inserted_community.id,
 734       language_id: Some(spanish_id),
 735       ..PostForm::default()
 736     };
 737
 738     Post::create(conn, &post_spanish).unwrap();
 739
 740     let post_listings_all = PostQuery::builder()
 741       .conn(conn)
 742       .sort(Some(SortType::New))
 743       .local_user(Some(&data.inserted_local_user))
 744       .build()
 745       .list()
 746       .unwrap();
 747
 748     // no language filters specified, all posts should be returned
 749     assert_eq!(3, post_listings_all.len());
 750
 751     let french_id = Language::read_id_from_code(conn, "fr").unwrap();
 752     LocalUserLanguage::update_user_languages(
 753       conn,
 754       Some(vec![french_id]),
 755       data.inserted_local_user.id,
 756     )
 757     .unwrap();
 758
 759     let post_listing_french = PostQuery::builder()
 760       .conn(conn)
 761       .sort(Some(SortType::New))
 762       .local_user(Some(&data.inserted_local_user))
 763       .build()
 764       .list()
 765       .unwrap();
 766
 767     // only one french language post should be returned
 768     assert_eq!(1, post_listing_french.len());
 769     assert_eq!(french_id, post_listing_french[0].post.language_id);
 770
 771     let undetermined_id = Language::read_id_from_code(conn, "und").unwrap();
 772     LocalUserLanguage::update_user_languages(
 773       conn,
 774       Some(vec![french_id, undetermined_id]),
 775       data.inserted_local_user.id,
 776     )
 777     .unwrap();
 778     let post_listings_french_und = PostQuery::builder()
 779       .conn(conn)
 780       .sort(Some(SortType::New))
 781       .local_user(Some(&data.inserted_local_user))
 782       .build()
 783       .list()
 784       .unwrap();
 785
 786     // french post and undetermined language post should be returned
 787     assert_eq!(2, post_listings_french_und.len());
 788     assert_eq!(
 789       undetermined_id,
 790       post_listings_french_und[0].post.language_id
 791     );
 792     assert_eq!(french_id, post_listings_french_und[1].post.language_id);
 793
 794     cleanup(data, conn);
 795   }
 796
 797   fn cleanup(data: Data, conn: &mut PgConnection) {
 798     let num_deleted = Post::delete(conn, data.inserted_post.id).unwrap();
 799     Community::delete(conn, data.inserted_community.id).unwrap();
 800     Person::delete(conn, data.inserted_person.id).unwrap();
 801     Person::delete(conn, data.inserted_bot.id).unwrap();
 802     Person::delete(conn, data.inserted_blocked_person.id).unwrap();
 803     assert_eq!(1, num_deleted);
 804   }
 805
 806   fn expected_post_view(data: &Data, conn: &mut PgConnection) -> PostView {
 807     let (inserted_person, inserted_community, inserted_post) = (
 808       &data.inserted_person,
 809       &data.inserted_community,
 810       &data.inserted_post,
 811     );
 812     let agg = PostAggregates::read(conn, inserted_post.id).unwrap();
 813
 814     PostView {
 815       post: Post {
 816         id: inserted_post.id,
 817         name: inserted_post.name.clone(),
 818         creator_id: inserted_person.id,
 819         url: None,
 820         body: None,
 821         published: inserted_post.published,
 822         updated: None,
 823         community_id: inserted_community.id,
 824         removed: false,
 825         deleted: false,
 826         locked: false,
 827         stickied: false,
 828         nsfw: false,
 829         embed_title: None,
 830         embed_description: None,
 831         embed_video_url: None,
 832         thumbnail_url: None,
 833         ap_id: inserted_post.ap_id.to_owned(),
 834         local: true,
 835         language_id: LanguageId(47),
 836       },
 837       my_vote: None,
 838       unread_comments: 0,
 839       creator: PersonSafe {
 840         id: inserted_person.id,
 841         name: inserted_person.name.clone(),
 842         display_name: None,
 843         published: inserted_person.published,
 844         avatar: None,
 845         actor_id: inserted_person.actor_id.to_owned(),
 846         local: true,
 847         admin: false,
 848         bot_account: false,
 849         banned: false,
 850         deleted: false,
 851         bio: None,
 852         banner: None,
 853         updated: None,
 854         inbox_url: inserted_person.inbox_url.to_owned(),
 855         shared_inbox_url: None,
 856         matrix_user_id: None,
 857         ban_expires: None,
 858       },
 859       creator_banned_from_community: false,
 860       community: CommunitySafe {
 861         id: inserted_community.id,
 862         name: inserted_community.name.clone(),
 863         icon: None,
 864         removed: false,
 865         deleted: false,
 866         nsfw: false,
 867         actor_id: inserted_community.actor_id.to_owned(),
 868         local: true,
 869         title: "nada".to_owned(),
 870         description: None,
 871         updated: None,
 872         banner: None,
 873         hidden: false,
 874         posting_restricted_to_mods: false,
 875         published: inserted_community.published,
 876       },
 877       counts: PostAggregates {
 878         id: agg.id,
 879         post_id: inserted_post.id,
 880         comments: 0,
 881         score: 0,
 882         upvotes: 0,
 883         downvotes: 0,
 884         stickied: false,
 885         published: agg.published,
 886         newest_comment_time_necro: inserted_post.published,
 887         newest_comment_time: inserted_post.published,
 888       },
 889       subscribed: SubscribedType::NotSubscribed,
 890       read: false,
 891       saved: false,
 892       creator_blocked: false,
 893     }
 894   }
 895 }