crates/api_common/src/utils.rs

   1 use crate::{request::purge_image_from_pictrs, sensitive::Sensitive, site::FederatedInstances};
   2 use anyhow::Context;
   3 use chrono::NaiveDateTime;
   4 use lemmy_db_schema::{
   5   impls::person::is_banned,
   6   newtypes::{CommunityId, DbUrl, LocalUserId, PersonId, PostId},
   7   source::{
   8     comment::{Comment, CommentUpdateForm},
   9     community::{Community, CommunityUpdateForm},
  10     email_verification::{EmailVerification, EmailVerificationForm},
  11     instance::Instance,
  12     local_site::{LocalSite, RegistrationMode},
  13     local_site_rate_limit::LocalSiteRateLimit,
  14     password_reset_request::PasswordResetRequest,
  15     person::{Person, PersonUpdateForm},
  16     person_block::PersonBlock,
  17     post::{Post, PostRead, PostReadForm},
  18     registration_application::RegistrationApplication,
  19     secret::Secret,
  20   },
  21   traits::{Crud, Readable},
  22   utils::DbPool,
  23   ListingType,
  24 };
  25 use lemmy_db_views::{
  26   comment_view::CommentQuery,
  27   structs::{LocalUserSettingsView, LocalUserView},
  28 };
  29 use lemmy_db_views_actor::structs::{
  30   CommunityModeratorView,
  31   CommunityPersonBanView,
  32   CommunityView,
  33   PersonViewSafe,
  34 };
  35 use lemmy_utils::{
  36   claims::Claims,
  37   email::{send_email, translations::Lang},
  38   error::LemmyError,
  39   location_info,
  40   rate_limit::RateLimitConfig,
  41   settings::structs::Settings,
  42   utils::slurs::build_slur_regex,
  43 };
  44 use regex::Regex;
  45 use reqwest_middleware::ClientWithMiddleware;
  46 use rosetta_i18n::{Language, LanguageId};
  47 use std::str::FromStr;
  48 use tracing::warn;
  49 use url::{ParseError, Url};
  50
  51 #[tracing::instrument(skip_all)]
  52 pub async fn is_mod_or_admin(
  53   pool: &DbPool,
  54   person_id: PersonId,
  55   community_id: CommunityId,
  56 ) -> Result<(), LemmyError> {
  57   let is_mod_or_admin = CommunityView::is_mod_or_admin(pool, person_id, community_id).await?;
  58   if !is_mod_or_admin {
  59     return Err(LemmyError::from_message("not_a_mod_or_admin"));
  60   }
  61   Ok(())
  62 }
  63
  64 pub async fn is_top_admin(pool: &DbPool, person_id: PersonId) -> Result<(), LemmyError> {
  65   let admins = PersonViewSafe::admins(pool).await?;
  66   let top_admin = admins
  67     .first()
  68     .ok_or_else(|| LemmyError::from_message("no admins"))?;
  69
  70   if top_admin.person.id != person_id {
  71     return Err(LemmyError::from_message("not_top_admin"));
  72   }
  73   Ok(())
  74 }
  75
  76 pub fn is_admin(local_user_view: &LocalUserView) -> Result<(), LemmyError> {
  77   if !local_user_view.person.admin {
  78     return Err(LemmyError::from_message("not_an_admin"));
  79   }
  80   Ok(())
  81 }
  82
  83 pub fn is_top_mod(
  84   local_user_view: &LocalUserView,
  85   community_mods: &[CommunityModeratorView],
  86 ) -> Result<(), LemmyError> {
  87   if local_user_view.person.id
  88     != community_mods
  89       .first()
  90       .map(|cm| cm.moderator.id)
  91       .unwrap_or(PersonId(0))
  92   {
  93     return Err(LemmyError::from_message("not_top_mod"));
  94   }
  95   Ok(())
  96 }
  97
  98 #[tracing::instrument(skip_all)]
  99 pub async fn get_post(post_id: PostId, pool: &DbPool) -> Result<Post, LemmyError> {
 100   Post::read(pool, post_id)
 101     .await
 102     .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_post"))
 103 }
 104
 105 #[tracing::instrument(skip_all)]
 106 pub async fn mark_post_as_read(
 107   person_id: PersonId,
 108   post_id: PostId,
 109   pool: &DbPool,
 110 ) -> Result<PostRead, LemmyError> {
 111   let post_read_form = PostReadForm { post_id, person_id };
 112
 113   PostRead::mark_as_read(pool, &post_read_form)
 114     .await
 115     .map_err(|e| LemmyError::from_error_message(e, "couldnt_mark_post_as_read"))
 116 }
 117
 118 #[tracing::instrument(skip_all)]
 119 pub async fn mark_post_as_unread(
 120   person_id: PersonId,
 121   post_id: PostId,
 122   pool: &DbPool,
 123 ) -> Result<usize, LemmyError> {
 124   let post_read_form = PostReadForm { post_id, person_id };
 125
 126   PostRead::mark_as_unread(pool, &post_read_form)
 127     .await
 128     .map_err(|e| LemmyError::from_error_message(e, "couldnt_mark_post_as_read"))
 129 }
 130
 131 #[tracing::instrument(skip_all)]
 132 pub async fn get_local_user_view_from_jwt(
 133   jwt: &str,
 134   pool: &DbPool,
 135   secret: &Secret,
 136 ) -> Result<LocalUserView, LemmyError> {
 137   let claims = Claims::decode(jwt, &secret.jwt_secret)
 138     .map_err(|e| e.with_message("not_logged_in"))?
 139     .claims;
 140   let local_user_id = LocalUserId(claims.sub);
 141   let local_user_view = LocalUserView::read(pool, local_user_id).await?;
 142   check_user_valid(
 143     local_user_view.person.banned,
 144     local_user_view.person.ban_expires,
 145     local_user_view.person.deleted,
 146   )?;
 147
 148   check_validator_time(&local_user_view.local_user.validator_time, &claims)?;
 149
 150   Ok(local_user_view)
 151 }
 152
 153 /// Checks if user's token was issued before user's password reset.
 154 pub fn check_validator_time(
 155   validator_time: &NaiveDateTime,
 156   claims: &Claims,
 157 ) -> Result<(), LemmyError> {
 158   let user_validation_time = validator_time.timestamp();
 159   if user_validation_time > claims.iat {
 160     Err(LemmyError::from_message("not_logged_in"))
 161   } else {
 162     Ok(())
 163   }
 164 }
 165
 166 #[tracing::instrument(skip_all)]
 167 pub async fn get_local_user_view_from_jwt_opt(
 168   jwt: Option<&Sensitive<String>>,
 169   pool: &DbPool,
 170   secret: &Secret,
 171 ) -> Result<Option<LocalUserView>, LemmyError> {
 172   match jwt {
 173     Some(jwt) => Ok(Some(get_local_user_view_from_jwt(jwt, pool, secret).await?)),
 174     None => Ok(None),
 175   }
 176 }
 177
 178 #[tracing::instrument(skip_all)]
 179 pub async fn get_local_user_settings_view_from_jwt_opt(
 180   jwt: Option<&Sensitive<String>>,
 181   pool: &DbPool,
 182   secret: &Secret,
 183 ) -> Result<Option<LocalUserSettingsView>, LemmyError> {
 184   match jwt {
 185     Some(jwt) => {
 186       let claims = Claims::decode(jwt.as_ref(), &secret.jwt_secret)
 187         .map_err(|e| e.with_message("not_logged_in"))?
 188         .claims;
 189       let local_user_id = LocalUserId(claims.sub);
 190       let local_user_view = LocalUserSettingsView::read(pool, local_user_id).await?;
 191       check_user_valid(
 192         local_user_view.person.banned,
 193         local_user_view.person.ban_expires,
 194         local_user_view.person.deleted,
 195       )?;
 196
 197       check_validator_time(&local_user_view.local_user.validator_time, &claims)?;
 198
 199       Ok(Some(local_user_view))
 200     }
 201     None => Ok(None),
 202   }
 203 }
 204 pub fn check_user_valid(
 205   banned: bool,
 206   ban_expires: Option<NaiveDateTime>,
 207   deleted: bool,
 208 ) -> Result<(), LemmyError> {
 209   // Check for a site ban
 210   if is_banned(banned, ban_expires) {
 211     return Err(LemmyError::from_message("site_ban"));
 212   }
 213
 214   // check for account deletion
 215   if deleted {
 216     return Err(LemmyError::from_message("deleted"));
 217   }
 218
 219   Ok(())
 220 }
 221
 222 #[tracing::instrument(skip_all)]
 223 pub async fn check_community_ban(
 224   person_id: PersonId,
 225   community_id: CommunityId,
 226   pool: &DbPool,
 227 ) -> Result<(), LemmyError> {
 228   let is_banned = CommunityPersonBanView::get(pool, person_id, community_id)
 229     .await
 230     .is_ok();
 231   if is_banned {
 232     Err(LemmyError::from_message("community_ban"))
 233   } else {
 234     Ok(())
 235   }
 236 }
 237
 238 #[tracing::instrument(skip_all)]
 239 pub async fn check_community_deleted_or_removed(
 240   community_id: CommunityId,
 241   pool: &DbPool,
 242 ) -> Result<(), LemmyError> {
 243   let community = Community::read(pool, community_id)
 244     .await
 245     .map_err(|e| LemmyError::from_error_message(e, "couldnt_find_community"))?;
 246   if community.deleted || community.removed {
 247     Err(LemmyError::from_message("deleted"))
 248   } else {
 249     Ok(())
 250   }
 251 }
 252
 253 pub fn check_post_deleted_or_removed(post: &Post) -> Result<(), LemmyError> {
 254   if post.deleted || post.removed {
 255     Err(LemmyError::from_message("deleted"))
 256   } else {
 257     Ok(())
 258   }
 259 }
 260
 261 #[tracing::instrument(skip_all)]
 262 pub async fn check_person_block(
 263   my_id: PersonId,
 264   potential_blocker_id: PersonId,
 265   pool: &DbPool,
 266 ) -> Result<(), LemmyError> {
 267   let is_blocked = PersonBlock::read(pool, potential_blocker_id, my_id)
 268     .await
 269     .is_ok();
 270   if is_blocked {
 271     Err(LemmyError::from_message("person_block"))
 272   } else {
 273     Ok(())
 274   }
 275 }
 276
 277 #[tracing::instrument(skip_all)]
 278 pub fn check_downvotes_enabled(score: i16, local_site: &LocalSite) -> Result<(), LemmyError> {
 279   if score == -1 && !local_site.enable_downvotes {
 280     return Err(LemmyError::from_message("downvotes_disabled"));
 281   }
 282   Ok(())
 283 }
 284
 285 #[tracing::instrument(skip_all)]
 286 pub fn check_private_instance(
 287   local_user_view: &Option<LocalUserView>,
 288   local_site: &LocalSite,
 289 ) -> Result<(), LemmyError> {
 290   if local_user_view.is_none() && local_site.private_instance {
 291     return Err(LemmyError::from_message("instance_is_private"));
 292   }
 293   Ok(())
 294 }
 295
 296 #[tracing::instrument(skip_all)]
 297 pub async fn build_federated_instances(
 298   local_site: &LocalSite,
 299   pool: &DbPool,
 300 ) -> Result<Option<FederatedInstances>, LemmyError> {
 301   if local_site.federation_enabled {
 302     // TODO I hate that this requires 3 queries
 303     let linked = Instance::linked(pool).await?;
 304     let allowed = Instance::allowlist(pool).await?;
 305     let blocked = Instance::blocklist(pool).await?;
 306
 307     // These can return empty vectors, so convert them to options
 308     let allowed = (!allowed.is_empty()).then_some(allowed);
 309     let blocked = (!blocked.is_empty()).then_some(blocked);
 310
 311     Ok(Some(FederatedInstances {
 312       linked,
 313       allowed,
 314       blocked,
 315     }))
 316   } else {
 317     Ok(None)
 318   }
 319 }
 320
 321 /// Checks the password length
 322 pub fn password_length_check(pass: &str) -> Result<(), LemmyError> {
 323   if !(10..=60).contains(&pass.chars().count()) {
 324     Err(LemmyError::from_message("invalid_password"))
 325   } else {
 326     Ok(())
 327   }
 328 }
 329
 330 /// Checks the site description length
 331 pub fn site_description_length_check(description: &str) -> Result<(), LemmyError> {
 332   if description.len() > 150 {
 333     Err(LemmyError::from_message("site_description_length_overflow"))
 334   } else {
 335     Ok(())
 336   }
 337 }
 338
 339 /// Checks for a honeypot. If this field is filled, fail the rest of the function
 340 pub fn honeypot_check(honeypot: &Option<String>) -> Result<(), LemmyError> {
 341   if honeypot.is_some() && honeypot != &Some(String::new()) {
 342     Err(LemmyError::from_message("honeypot_fail"))
 343   } else {
 344     Ok(())
 345   }
 346 }
 347
 348 pub fn send_email_to_user(
 349   local_user_view: &LocalUserView,
 350   subject: &str,
 351   body: &str,
 352   settings: &Settings,
 353 ) {
 354   if local_user_view.person.banned || !local_user_view.local_user.send_notifications_to_email {
 355     return;
 356   }
 357
 358   if let Some(user_email) = &local_user_view.local_user.email {
 359     match send_email(
 360       subject,
 361       user_email,
 362       &local_user_view.person.name,
 363       body,
 364       settings,
 365     ) {
 366       Ok(_o) => _o,
 367       Err(e) => warn!("{}", e),
 368     };
 369   }
 370 }
 371
 372 pub async fn send_password_reset_email(
 373   user: &LocalUserView,
 374   pool: &DbPool,
 375   settings: &Settings,
 376 ) -> Result<(), LemmyError> {
 377   // Generate a random token
 378   let token = uuid::Uuid::new_v4().to_string();
 379
 380   // Insert the row
 381   let token2 = token.clone();
 382   let local_user_id = user.local_user.id;
 383   PasswordResetRequest::create_token(pool, local_user_id, &token2).await?;
 384
 385   let email = &user.local_user.email.clone().expect("email");
 386   let lang = get_interface_language(user);
 387   let subject = &lang.password_reset_subject(&user.person.name);
 388   let protocol_and_hostname = settings.get_protocol_and_hostname();
 389   let reset_link = format!("{}/password_change/{}", protocol_and_hostname, &token);
 390   let body = &lang.password_reset_body(reset_link, &user.person.name);
 391   send_email(subject, email, &user.person.name, body, settings)
 392 }
 393
 394 /// Send a verification email
 395 pub async fn send_verification_email(
 396   user: &LocalUserView,
 397   new_email: &str,
 398   pool: &DbPool,
 399   settings: &Settings,
 400 ) -> Result<(), LemmyError> {
 401   let form = EmailVerificationForm {
 402     local_user_id: user.local_user.id,
 403     email: new_email.to_string(),
 404     verification_token: uuid::Uuid::new_v4().to_string(),
 405   };
 406   let verify_link = format!(
 407     "{}/verify_email/{}",
 408     settings.get_protocol_and_hostname(),
 409     &form.verification_token
 410   );
 411   EmailVerification::create(pool, &form).await?;
 412
 413   let lang = get_interface_language(user);
 414   let subject = lang.verify_email_subject(&settings.hostname);
 415   let body = lang.verify_email_body(&settings.hostname, &user.person.name, verify_link);
 416   send_email(&subject, new_email, &user.person.name, &body, settings)?;
 417
 418   Ok(())
 419 }
 420
 421 pub fn send_email_verification_success(
 422   user: &LocalUserView,
 423   settings: &Settings,
 424 ) -> Result<(), LemmyError> {
 425   let email = &user.local_user.email.clone().expect("email");
 426   let lang = get_interface_language(user);
 427   let subject = &lang.email_verified_subject(&user.person.actor_id);
 428   let body = &lang.email_verified_body();
 429   send_email(subject, email, &user.person.name, body, settings)
 430 }
 431
 432 pub fn get_interface_language(user: &LocalUserView) -> Lang {
 433   lang_str_to_lang(&user.local_user.interface_language)
 434 }
 435
 436 pub fn get_interface_language_from_settings(user: &LocalUserSettingsView) -> Lang {
 437   lang_str_to_lang(&user.local_user.interface_language)
 438 }
 439
 440 fn lang_str_to_lang(lang: &str) -> Lang {
 441   let lang_id = LanguageId::new(lang);
 442   Lang::from_language_id(&lang_id).unwrap_or_else(|| {
 443     let en = LanguageId::new("en");
 444     Lang::from_language_id(&en).expect("default language")
 445   })
 446 }
 447
 448 pub fn local_site_rate_limit_to_rate_limit_config(
 449   local_site_rate_limit: &LocalSiteRateLimit,
 450 ) -> RateLimitConfig {
 451   let l = local_site_rate_limit;
 452   RateLimitConfig {
 453     message: l.message,
 454     message_per_second: l.message_per_second,
 455     post: l.post,
 456     post_per_second: l.post_per_second,
 457     register: l.register,
 458     register_per_second: l.register_per_second,
 459     image: l.image,
 460     image_per_second: l.image_per_second,
 461     comment: l.comment,
 462     comment_per_second: l.comment_per_second,
 463     search: l.search,
 464     search_per_second: l.search_per_second,
 465   }
 466 }
 467
 468 pub fn local_site_to_slur_regex(local_site: &LocalSite) -> Option<Regex> {
 469   build_slur_regex(local_site.slur_filter_regex.as_deref())
 470 }
 471
 472 pub fn local_site_opt_to_slur_regex(local_site: &Option<LocalSite>) -> Option<Regex> {
 473   local_site
 474     .as_ref()
 475     .map(local_site_to_slur_regex)
 476     .unwrap_or(None)
 477 }
 478
 479 pub fn send_application_approved_email(
 480   user: &LocalUserView,
 481   settings: &Settings,
 482 ) -> Result<(), LemmyError> {
 483   let email = &user.local_user.email.clone().expect("email");
 484   let lang = get_interface_language(user);
 485   let subject = lang.registration_approved_subject(&user.person.actor_id);
 486   let body = lang.registration_approved_body(&settings.hostname);
 487   send_email(&subject, email, &user.person.name, &body, settings)
 488 }
 489
 490 /// Send a new applicant email notification to all admins
 491 pub async fn send_new_applicant_email_to_admins(
 492   applicant_username: &str,
 493   pool: &DbPool,
 494   settings: &Settings,
 495 ) -> Result<(), LemmyError> {
 496   // Collect the admins with emails
 497   let admins = LocalUserSettingsView::list_admins_with_emails(pool).await?;
 498
 499   let applications_link = &format!(
 500     "{}/registration_applications",
 501     settings.get_protocol_and_hostname(),
 502   );
 503
 504   for admin in &admins {
 505     let email = &admin.local_user.email.clone().expect("email");
 506     let lang = get_interface_language_from_settings(admin);
 507     let subject = lang.new_application_subject(&settings.hostname, applicant_username);
 508     let body = lang.new_application_body(applications_link);
 509     send_email(&subject, email, &admin.person.name, &body, settings)?;
 510   }
 511   Ok(())
 512 }
 513
 514 /// Send a report to all admins
 515 pub async fn send_new_report_email_to_admins(
 516   reporter_username: &str,
 517   reported_username: &str,
 518   pool: &DbPool,
 519   settings: &Settings,
 520 ) -> Result<(), LemmyError> {
 521   // Collect the admins with emails
 522   let admins = LocalUserSettingsView::list_admins_with_emails(pool).await?;
 523
 524   let reports_link = &format!("{}/reports", settings.get_protocol_and_hostname(),);
 525
 526   for admin in &admins {
 527     let email = &admin.local_user.email.clone().expect("email");
 528     let lang = get_interface_language_from_settings(admin);
 529     let subject = lang.new_report_subject(&settings.hostname, reporter_username, reported_username);
 530     let body = lang.new_report_body(reports_link);
 531     send_email(&subject, email, &admin.person.name, &body, settings)?;
 532   }
 533   Ok(())
 534 }
 535
 536 pub async fn check_registration_application(
 537   local_user_view: &LocalUserView,
 538   local_site: &LocalSite,
 539   pool: &DbPool,
 540 ) -> Result<(), LemmyError> {
 541   if local_site.registration_mode == RegistrationMode::RequireApplication
 542     && !local_user_view.local_user.accepted_application
 543     && !local_user_view.person.admin
 544   {
 545     // Fetch the registration, see if its denied
 546     let local_user_id = local_user_view.local_user.id;
 547     let registration = RegistrationApplication::find_by_local_user_id(pool, local_user_id).await?;
 548     if let Some(deny_reason) = registration.deny_reason {
 549       let lang = get_interface_language(local_user_view);
 550       let registration_denied_message = format!("{}: {}", lang.registration_denied(), &deny_reason);
 551       return Err(LemmyError::from_message(&registration_denied_message));
 552     } else {
 553       return Err(LemmyError::from_message("registration_application_pending"));
 554     }
 555   }
 556   Ok(())
 557 }
 558
 559 pub fn check_private_instance_and_federation_enabled(
 560   local_site: &LocalSite,
 561 ) -> Result<(), LemmyError> {
 562   if local_site.private_instance && local_site.federation_enabled {
 563     return Err(LemmyError::from_message(
 564       "Cannot have both private instance and federation enabled.",
 565     ));
 566   }
 567   Ok(())
 568 }
 569
 570 pub async fn purge_image_posts_for_person(
 571   banned_person_id: PersonId,
 572   pool: &DbPool,
 573   settings: &Settings,
 574   client: &ClientWithMiddleware,
 575 ) -> Result<(), LemmyError> {
 576   let posts = Post::fetch_pictrs_posts_for_creator(pool, banned_person_id).await?;
 577   for post in posts {
 578     if let Some(url) = post.url {
 579       purge_image_from_pictrs(client, settings, &url).await.ok();
 580     }
 581     if let Some(thumbnail_url) = post.thumbnail_url {
 582       purge_image_from_pictrs(client, settings, &thumbnail_url)
 583         .await
 584         .ok();
 585     }
 586   }
 587
 588   Post::remove_pictrs_post_images_and_thumbnails_for_creator(pool, banned_person_id).await?;
 589
 590   Ok(())
 591 }
 592
 593 pub async fn purge_image_posts_for_community(
 594   banned_community_id: CommunityId,
 595   pool: &DbPool,
 596   settings: &Settings,
 597   client: &ClientWithMiddleware,
 598 ) -> Result<(), LemmyError> {
 599   let posts = Post::fetch_pictrs_posts_for_community(pool, banned_community_id).await?;
 600   for post in posts {
 601     if let Some(url) = post.url {
 602       purge_image_from_pictrs(client, settings, &url).await.ok();
 603     }
 604     if let Some(thumbnail_url) = post.thumbnail_url {
 605       purge_image_from_pictrs(client, settings, &thumbnail_url)
 606         .await
 607         .ok();
 608     }
 609   }
 610
 611   Post::remove_pictrs_post_images_and_thumbnails_for_community(pool, banned_community_id).await?;
 612
 613   Ok(())
 614 }
 615
 616 pub async fn remove_user_data(
 617   banned_person_id: PersonId,
 618   pool: &DbPool,
 619   settings: &Settings,
 620   client: &ClientWithMiddleware,
 621 ) -> Result<(), LemmyError> {
 622   // Purge user images
 623   let person = Person::read(pool, banned_person_id).await?;
 624   if let Some(avatar) = person.avatar {
 625     purge_image_from_pictrs(client, settings, &avatar)
 626       .await
 627       .ok();
 628   }
 629   if let Some(banner) = person.banner {
 630     purge_image_from_pictrs(client, settings, &banner)
 631       .await
 632       .ok();
 633   }
 634
 635   // Update the fields to None
 636   Person::update(
 637     pool,
 638     banned_person_id,
 639     &PersonUpdateForm::builder()
 640       .avatar(Some(None))
 641       .banner(Some(None))
 642       .build(),
 643   )
 644   .await?;
 645
 646   // Posts
 647   Post::update_removed_for_creator(pool, banned_person_id, None, true).await?;
 648
 649   // Purge image posts
 650   purge_image_posts_for_person(banned_person_id, pool, settings, client).await?;
 651
 652   // Communities
 653   // Remove all communities where they're the top mod
 654   // for now, remove the communities manually
 655   let first_mod_communities = CommunityModeratorView::get_community_first_mods(pool).await?;
 656
 657   // Filter to only this banned users top communities
 658   let banned_user_first_communities: Vec<CommunityModeratorView> = first_mod_communities
 659     .into_iter()
 660     .filter(|fmc| fmc.moderator.id == banned_person_id)
 661     .collect();
 662
 663   for first_mod_community in banned_user_first_communities {
 664     let community_id = first_mod_community.community.id;
 665     Community::update(
 666       pool,
 667       community_id,
 668       &CommunityUpdateForm::builder().removed(Some(true)).build(),
 669     )
 670     .await?;
 671
 672     // Delete the community images
 673     if let Some(icon) = first_mod_community.community.icon {
 674       purge_image_from_pictrs(client, settings, &icon).await.ok();
 675     }
 676     if let Some(banner) = first_mod_community.community.banner {
 677       purge_image_from_pictrs(client, settings, &banner)
 678         .await
 679         .ok();
 680     }
 681     // Update the fields to None
 682     Community::update(
 683       pool,
 684       community_id,
 685       &CommunityUpdateForm::builder()
 686         .icon(Some(None))
 687         .banner(Some(None))
 688         .build(),
 689     )
 690     .await?;
 691   }
 692
 693   // Comments
 694   Comment::update_removed_for_creator(pool, banned_person_id, true).await?;
 695
 696   Ok(())
 697 }
 698
 699 pub async fn remove_user_data_in_community(
 700   community_id: CommunityId,
 701   banned_person_id: PersonId,
 702   pool: &DbPool,
 703 ) -> Result<(), LemmyError> {
 704   // Posts
 705   Post::update_removed_for_creator(pool, banned_person_id, Some(community_id), true).await?;
 706
 707   // Comments
 708   // TODO Diesel doesn't allow updates with joins, so this has to be a loop
 709   let comments = CommentQuery::builder()
 710     .pool(pool)
 711     .creator_id(Some(banned_person_id))
 712     .community_id(Some(community_id))
 713     .limit(Some(i64::MAX))
 714     .build()
 715     .list()
 716     .await?;
 717
 718   for comment_view in &comments {
 719     let comment_id = comment_view.comment.id;
 720     Comment::update(
 721       pool,
 722       comment_id,
 723       &CommentUpdateForm::builder().removed(Some(true)).build(),
 724     )
 725     .await?;
 726   }
 727
 728   Ok(())
 729 }
 730
 731 pub async fn delete_user_account(
 732   person_id: PersonId,
 733   pool: &DbPool,
 734   settings: &Settings,
 735   client: &ClientWithMiddleware,
 736 ) -> Result<(), LemmyError> {
 737   // Delete their images
 738   let person = Person::read(pool, person_id).await?;
 739   if let Some(avatar) = person.avatar {
 740     purge_image_from_pictrs(client, settings, &avatar)
 741       .await
 742       .ok();
 743   }
 744   if let Some(banner) = person.banner {
 745     purge_image_from_pictrs(client, settings, &banner)
 746       .await
 747       .ok();
 748   }
 749   // No need to update avatar and banner, those are handled in Person::delete_account
 750
 751   // Comments
 752   Comment::permadelete_for_creator(pool, person_id)
 753     .await
 754     .map_err(|e| LemmyError::from_error_message(e, "couldnt_update_comment"))?;
 755
 756   // Posts
 757   Post::permadelete_for_creator(pool, person_id)
 758     .await
 759     .map_err(|e| LemmyError::from_error_message(e, "couldnt_update_post"))?;
 760
 761   // Purge image posts
 762   purge_image_posts_for_person(person_id, pool, settings, client).await?;
 763
 764   Person::delete_account(pool, person_id).await?;
 765
 766   Ok(())
 767 }
 768
 769 pub fn listing_type_with_site_default(
 770   listing_type: Option<ListingType>,
 771   local_site: &LocalSite,
 772 ) -> Result<ListingType, LemmyError> {
 773   Ok(listing_type.unwrap_or(ListingType::from_str(
 774     &local_site.default_post_listing_type,
 775   )?))
 776 }
 777
 778 #[cfg(test)]
 779 mod tests {
 780   use crate::utils::{honeypot_check, password_length_check};
 781
 782   #[test]
 783   #[rustfmt::skip]
 784   fn password_length() {
 785     assert!(password_length_check("Õ¼¾°3yË,o¸ãtÌÈú|ÇÁÙAøüÒI©·¤(T]/ð>æºWæ[C¤bªWöaÃÎñ·{=û³&§½K/c").is_ok());
 786     assert!(password_length_check("1234567890").is_ok());
 787     assert!(password_length_check("short").is_err());
 788     assert!(password_length_check("looooooooooooooooooooooooooooooooooooooooooooooooooooooooooong").is_err());
 789   }
 790
 791   #[test]
 792   fn honeypot() {
 793     assert!(honeypot_check(&None).is_ok());
 794     assert!(honeypot_check(&Some(String::new())).is_ok());
 795     assert!(honeypot_check(&Some("1".to_string())).is_err());
 796     assert!(honeypot_check(&Some("message".to_string())).is_err());
 797   }
 798 }
 799
 800 pub enum EndpointType {
 801   Community,
 802   Person,
 803   Post,
 804   Comment,
 805   PrivateMessage,
 806 }
 807
 808 /// Generates an apub endpoint for a given domain, IE xyz.tld
 809 pub fn generate_local_apub_endpoint(
 810   endpoint_type: EndpointType,
 811   name: &str,
 812   domain: &str,
 813 ) -> Result<DbUrl, ParseError> {
 814   let point = match endpoint_type {
 815     EndpointType::Community => "c",
 816     EndpointType::Person => "u",
 817     EndpointType::Post => "post",
 818     EndpointType::Comment => "comment",
 819     EndpointType::PrivateMessage => "private_message",
 820   };
 821
 822   Ok(Url::parse(&format!("{domain}/{point}/{name}"))?.into())
 823 }
 824
 825 pub fn generate_followers_url(actor_id: &DbUrl) -> Result<DbUrl, ParseError> {
 826   Ok(Url::parse(&format!("{actor_id}/followers"))?.into())
 827 }
 828
 829 pub fn generate_inbox_url(actor_id: &DbUrl) -> Result<DbUrl, ParseError> {
 830   Ok(Url::parse(&format!("{actor_id}/inbox"))?.into())
 831 }
 832
 833 pub fn generate_site_inbox_url(actor_id: &DbUrl) -> Result<DbUrl, ParseError> {
 834   let mut actor_id: Url = actor_id.clone().into();
 835   actor_id.set_path("site_inbox");
 836   Ok(actor_id.into())
 837 }
 838
 839 pub fn generate_shared_inbox_url(actor_id: &DbUrl) -> Result<DbUrl, LemmyError> {
 840   let actor_id: Url = actor_id.clone().into();
 841   let url = format!(
 842     "{}://{}{}/inbox",
 843     &actor_id.scheme(),
 844     &actor_id.host_str().context(location_info!())?,
 845     if let Some(port) = actor_id.port() {
 846       format!(":{port}")
 847     } else {
 848       String::new()
 849     },
 850   );
 851   Ok(Url::parse(&url)?.into())
 852 }
 853
 854 pub fn generate_outbox_url(actor_id: &DbUrl) -> Result<DbUrl, ParseError> {
 855   Ok(Url::parse(&format!("{actor_id}/outbox"))?.into())
 856 }
 857
 858 pub fn generate_featured_url(actor_id: &DbUrl) -> Result<DbUrl, ParseError> {
 859   Ok(Url::parse(&format!("{actor_id}/featured"))?.into())
 860 }
 861
 862 pub fn generate_moderators_url(community_id: &DbUrl) -> Result<DbUrl, LemmyError> {
 863   Ok(Url::parse(&format!("{community_id}/moderators"))?.into())
 864 }