crates/api/src/community.rs

   1 use crate::Perform;
   2 use actix_web::web::Data;
   3 use anyhow::Context;
   4 use lemmy_api_common::{
   5   blocking,
   6   check_community_ban,
   7   check_community_deleted_or_removed,
   8   community::*,
   9   get_local_user_view_from_jwt,
  10   is_mod_or_admin,
  11 };
  12 use lemmy_apub::{
  13   objects::{community::ApubCommunity, person::ApubPerson},
  14   protocol::activities::{
  15     community::{
  16       add_mod::AddMod,
  17       block_user::BlockUserFromCommunity,
  18       remove_mod::RemoveMod,
  19       undo_block_user::UndoBlockUserFromCommunity,
  20     },
  21     following::{follow::FollowCommunity as FollowCommunityApub, undo_follow::UndoFollowCommunity},
  22   },
  23 };
  24 use lemmy_db_schema::{
  25   source::{
  26     comment::Comment,
  27     community::{
  28       Community,
  29       CommunityFollower,
  30       CommunityFollowerForm,
  31       CommunityModerator,
  32       CommunityModeratorForm,
  33       CommunityPersonBan,
  34       CommunityPersonBanForm,
  35     },
  36     community_block::{CommunityBlock, CommunityBlockForm},
  37     moderator::{
  38       ModAddCommunity,
  39       ModAddCommunityForm,
  40       ModBanFromCommunity,
  41       ModBanFromCommunityForm,
  42       ModTransferCommunity,
  43       ModTransferCommunityForm,
  44     },
  45     person::Person,
  46     post::Post,
  47   },
  48   traits::{Bannable, Blockable, Crud, Followable, Joinable},
  49 };
  50 use lemmy_db_views::comment_view::CommentQueryBuilder;
  51 use lemmy_db_views_actor::{
  52   community_moderator_view::CommunityModeratorView,
  53   community_view::CommunityView,
  54   person_view::PersonViewSafe,
  55 };
  56 use lemmy_utils::{location_info, utils::naive_from_unix, ConnectionId, LemmyError};
  57 use lemmy_websocket::{messages::SendCommunityRoomMessage, LemmyContext, UserOperation};
  58
  59 #[async_trait::async_trait(?Send)]
  60 impl Perform for FollowCommunity {
  61   type Response = CommunityResponse;
  62
  63   #[tracing::instrument(skip(context, _websocket_id))]
  64   async fn perform(
  65     &self,
  66     context: &Data<LemmyContext>,
  67     _websocket_id: Option<ConnectionId>,
  68   ) -> Result<CommunityResponse, LemmyError> {
  69     let data: &FollowCommunity = self;
  70     let local_user_view =
  71       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  72
  73     let community_id = data.community_id;
  74     let community: ApubCommunity = blocking(context.pool(), move |conn| {
  75       Community::read(conn, community_id)
  76     })
  77     .await??
  78     .into();
  79     let community_follower_form = CommunityFollowerForm {
  80       community_id: data.community_id,
  81       person_id: local_user_view.person.id,
  82       pending: false,
  83     };
  84
  85     if community.local {
  86       if data.follow {
  87         check_community_ban(local_user_view.person.id, community_id, context.pool()).await?;
  88         check_community_deleted_or_removed(community_id, context.pool()).await?;
  89
  90         let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
  91         blocking(context.pool(), follow)
  92           .await?
  93           .map_err(LemmyError::from)
  94           .map_err(|e| e.with_message("community_follower_already_exists"))?;
  95       } else {
  96         let unfollow =
  97           move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
  98         blocking(context.pool(), unfollow)
  99           .await?
 100           .map_err(LemmyError::from)
 101           .map_err(|e| e.with_message("community_follower_already_exists"))?;
 102       }
 103     } else if data.follow {
 104       // Dont actually add to the community followers here, because you need
 105       // to wait for the accept
 106       FollowCommunityApub::send(&local_user_view.person.clone().into(), &community, context)
 107         .await?;
 108     } else {
 109       UndoFollowCommunity::send(&local_user_view.person.clone().into(), &community, context)
 110         .await?;
 111       let unfollow = move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
 112       blocking(context.pool(), unfollow)
 113         .await?
 114         .map_err(LemmyError::from)
 115         .map_err(|e| e.with_message("community_follower_already_exists"))?;
 116     }
 117
 118     let community_id = data.community_id;
 119     let person_id = local_user_view.person.id;
 120     let mut community_view = blocking(context.pool(), move |conn| {
 121       CommunityView::read(conn, community_id, Some(person_id))
 122     })
 123     .await??;
 124
 125     // TODO: this needs to return a "pending" state, until Accept is received from the remote server
 126     // For now, just assume that remote follows are accepted.
 127     // Otherwise, the subscribed will be null
 128     if !community.local {
 129       community_view.subscribed = data.follow;
 130     }
 131
 132     Ok(CommunityResponse { community_view })
 133   }
 134 }
 135
 136 #[async_trait::async_trait(?Send)]
 137 impl Perform for BlockCommunity {
 138   type Response = BlockCommunityResponse;
 139
 140   #[tracing::instrument(skip(context, _websocket_id))]
 141   async fn perform(
 142     &self,
 143     context: &Data<LemmyContext>,
 144     _websocket_id: Option<ConnectionId>,
 145   ) -> Result<BlockCommunityResponse, LemmyError> {
 146     let data: &BlockCommunity = self;
 147     let local_user_view =
 148       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 149
 150     let community_id = data.community_id;
 151     let person_id = local_user_view.person.id;
 152     let community_block_form = CommunityBlockForm {
 153       person_id,
 154       community_id,
 155     };
 156
 157     if data.block {
 158       let block = move |conn: &'_ _| CommunityBlock::block(conn, &community_block_form);
 159       blocking(context.pool(), block)
 160         .await?
 161         .map_err(LemmyError::from)
 162         .map_err(|e| e.with_message("community_block_already_exists"))?;
 163
 164       // Also, unfollow the community, and send a federated unfollow
 165       let community_follower_form = CommunityFollowerForm {
 166         community_id: data.community_id,
 167         person_id,
 168         pending: false,
 169       };
 170       blocking(context.pool(), move |conn: &'_ _| {
 171         CommunityFollower::unfollow(conn, &community_follower_form)
 172       })
 173       .await?
 174       .ok();
 175       let community = blocking(context.pool(), move |conn| {
 176         Community::read(conn, community_id)
 177       })
 178       .await??;
 179       UndoFollowCommunity::send(&local_user_view.person.into(), &community.into(), context).await?;
 180     } else {
 181       let unblock = move |conn: &'_ _| CommunityBlock::unblock(conn, &community_block_form);
 182       blocking(context.pool(), unblock)
 183         .await?
 184         .map_err(LemmyError::from)
 185         .map_err(|e| e.with_message("community_block_already_exists"))?;
 186     }
 187
 188     let community_view = blocking(context.pool(), move |conn| {
 189       CommunityView::read(conn, community_id, Some(person_id))
 190     })
 191     .await??;
 192
 193     Ok(BlockCommunityResponse {
 194       blocked: data.block,
 195       community_view,
 196     })
 197   }
 198 }
 199
 200 #[async_trait::async_trait(?Send)]
 201 impl Perform for BanFromCommunity {
 202   type Response = BanFromCommunityResponse;
 203
 204   #[tracing::instrument(skip(context, websocket_id))]
 205   async fn perform(
 206     &self,
 207     context: &Data<LemmyContext>,
 208     websocket_id: Option<ConnectionId>,
 209   ) -> Result<BanFromCommunityResponse, LemmyError> {
 210     let data: &BanFromCommunity = self;
 211     let local_user_view =
 212       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 213
 214     let community_id = data.community_id;
 215     let banned_person_id = data.person_id;
 216     let expires = data.expires.map(naive_from_unix);
 217
 218     // Verify that only mods or admins can ban
 219     is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
 220
 221     let community_user_ban_form = CommunityPersonBanForm {
 222       community_id: data.community_id,
 223       person_id: data.person_id,
 224       expires: Some(expires),
 225     };
 226
 227     let community: ApubCommunity = blocking(context.pool(), move |conn: &'_ _| {
 228       Community::read(conn, community_id)
 229     })
 230     .await??
 231     .into();
 232     let banned_person: ApubPerson = blocking(context.pool(), move |conn: &'_ _| {
 233       Person::read(conn, banned_person_id)
 234     })
 235     .await??
 236     .into();
 237
 238     if data.ban {
 239       let ban = move |conn: &'_ _| CommunityPersonBan::ban(conn, &community_user_ban_form);
 240       blocking(context.pool(), ban)
 241         .await?
 242         .map_err(LemmyError::from)
 243         .map_err(|e| e.with_message("community_user_already_banned"))?;
 244
 245       // Also unsubscribe them from the community, if they are subscribed
 246       let community_follower_form = CommunityFollowerForm {
 247         community_id: data.community_id,
 248         person_id: banned_person_id,
 249         pending: false,
 250       };
 251       blocking(context.pool(), move |conn: &'_ _| {
 252         CommunityFollower::unfollow(conn, &community_follower_form)
 253       })
 254       .await?
 255       .ok();
 256
 257       BlockUserFromCommunity::send(
 258         &community,
 259         &banned_person,
 260         &local_user_view.person.clone().into(),
 261         expires,
 262         context,
 263       )
 264       .await?;
 265     } else {
 266       let unban = move |conn: &'_ _| CommunityPersonBan::unban(conn, &community_user_ban_form);
 267       blocking(context.pool(), unban)
 268         .await?
 269         .map_err(LemmyError::from)
 270         .map_err(|e| e.with_message("community_user_already_banned"))?;
 271       UndoBlockUserFromCommunity::send(
 272         &community,
 273         &banned_person,
 274         &local_user_view.person.clone().into(),
 275         context,
 276       )
 277       .await?;
 278     }
 279
 280     // Remove/Restore their data if that's desired
 281     if data.remove_data.unwrap_or(false) {
 282       // Posts
 283       blocking(context.pool(), move |conn: &'_ _| {
 284         Post::update_removed_for_creator(conn, banned_person_id, Some(community_id), true)
 285       })
 286       .await??;
 287
 288       // Comments
 289       // TODO Diesel doesn't allow updates with joins, so this has to be a loop
 290       let comments = blocking(context.pool(), move |conn| {
 291         CommentQueryBuilder::create(conn)
 292           .creator_id(banned_person_id)
 293           .community_id(community_id)
 294           .limit(std::i64::MAX)
 295           .list()
 296       })
 297       .await??;
 298
 299       for comment_view in &comments {
 300         let comment_id = comment_view.comment.id;
 301         blocking(context.pool(), move |conn: &'_ _| {
 302           Comment::update_removed(conn, comment_id, true)
 303         })
 304         .await??;
 305       }
 306     }
 307
 308     // Mod tables
 309     let form = ModBanFromCommunityForm {
 310       mod_person_id: local_user_view.person.id,
 311       other_person_id: data.person_id,
 312       community_id: data.community_id,
 313       reason: data.reason.to_owned(),
 314       banned: Some(data.ban),
 315       expires,
 316     };
 317     blocking(context.pool(), move |conn| {
 318       ModBanFromCommunity::create(conn, &form)
 319     })
 320     .await??;
 321
 322     let person_id = data.person_id;
 323     let person_view = blocking(context.pool(), move |conn| {
 324       PersonViewSafe::read(conn, person_id)
 325     })
 326     .await??;
 327
 328     let res = BanFromCommunityResponse {
 329       person_view,
 330       banned: data.ban,
 331     };
 332
 333     context.chat_server().do_send(SendCommunityRoomMessage {
 334       op: UserOperation::BanFromCommunity,
 335       response: res.clone(),
 336       community_id,
 337       websocket_id,
 338     });
 339
 340     Ok(res)
 341   }
 342 }
 343
 344 #[async_trait::async_trait(?Send)]
 345 impl Perform for AddModToCommunity {
 346   type Response = AddModToCommunityResponse;
 347
 348   #[tracing::instrument(skip(context, websocket_id))]
 349   async fn perform(
 350     &self,
 351     context: &Data<LemmyContext>,
 352     websocket_id: Option<ConnectionId>,
 353   ) -> Result<AddModToCommunityResponse, LemmyError> {
 354     let data: &AddModToCommunity = self;
 355     let local_user_view =
 356       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 357
 358     let community_id = data.community_id;
 359
 360     // Verify that only mods or admins can add mod
 361     is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
 362
 363     // Update in local database
 364     let community_moderator_form = CommunityModeratorForm {
 365       community_id: data.community_id,
 366       person_id: data.person_id,
 367     };
 368     if data.added {
 369       let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 370       blocking(context.pool(), join)
 371         .await?
 372         .map_err(LemmyError::from)
 373         .map_err(|e| e.with_message("community_moderator_already_exists"))?;
 374     } else {
 375       let leave = move |conn: &'_ _| CommunityModerator::leave(conn, &community_moderator_form);
 376       blocking(context.pool(), leave)
 377         .await?
 378         .map_err(LemmyError::from)
 379         .map_err(|e| e.with_message("community_moderator_already_exists"))?;
 380     }
 381
 382     // Mod tables
 383     let form = ModAddCommunityForm {
 384       mod_person_id: local_user_view.person.id,
 385       other_person_id: data.person_id,
 386       community_id: data.community_id,
 387       removed: Some(!data.added),
 388     };
 389     blocking(context.pool(), move |conn| {
 390       ModAddCommunity::create(conn, &form)
 391     })
 392     .await??;
 393
 394     // Send to federated instances
 395     let updated_mod_id = data.person_id;
 396     let updated_mod: ApubPerson = blocking(context.pool(), move |conn| {
 397       Person::read(conn, updated_mod_id)
 398     })
 399     .await??
 400     .into();
 401     let community: ApubCommunity = blocking(context.pool(), move |conn| {
 402       Community::read(conn, community_id)
 403     })
 404     .await??
 405     .into();
 406     if data.added {
 407       AddMod::send(
 408         &community,
 409         &updated_mod,
 410         &local_user_view.person.into(),
 411         context,
 412       )
 413       .await?;
 414     } else {
 415       RemoveMod::send(
 416         &community,
 417         &updated_mod,
 418         &local_user_view.person.into(),
 419         context,
 420       )
 421       .await?;
 422     }
 423
 424     // Note: in case a remote mod is added, this returns the old moderators list, it will only get
 425     //       updated once we receive an activity from the community (like `Announce/Add/Moderator`)
 426     let community_id = data.community_id;
 427     let moderators = blocking(context.pool(), move |conn| {
 428       CommunityModeratorView::for_community(conn, community_id)
 429     })
 430     .await??;
 431
 432     let res = AddModToCommunityResponse { moderators };
 433     context.chat_server().do_send(SendCommunityRoomMessage {
 434       op: UserOperation::AddModToCommunity,
 435       response: res.clone(),
 436       community_id,
 437       websocket_id,
 438     });
 439     Ok(res)
 440   }
 441 }
 442
 443 // TODO: we dont do anything for federation here, it should be updated the next time the community
 444 //       gets fetched. i hope we can get rid of the community creator role soon.
 445 #[async_trait::async_trait(?Send)]
 446 impl Perform for TransferCommunity {
 447   type Response = GetCommunityResponse;
 448
 449   #[tracing::instrument(skip(context, _websocket_id))]
 450   async fn perform(
 451     &self,
 452     context: &Data<LemmyContext>,
 453     _websocket_id: Option<ConnectionId>,
 454   ) -> Result<GetCommunityResponse, LemmyError> {
 455     let data: &TransferCommunity = self;
 456     let local_user_view =
 457       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 458
 459     let admins = blocking(context.pool(), PersonViewSafe::admins).await??;
 460
 461     // Fetch the community mods
 462     let community_id = data.community_id;
 463     let mut community_mods = blocking(context.pool(), move |conn| {
 464       CommunityModeratorView::for_community(conn, community_id)
 465     })
 466     .await??;
 467
 468     // Make sure transferrer is either the top community mod, or an admin
 469     if local_user_view.person.id != community_mods[0].moderator.id
 470       && !admins
 471         .iter()
 472         .map(|a| a.person.id)
 473         .any(|x| x == local_user_view.person.id)
 474     {
 475       return Err(LemmyError::from_message("not_an_admin"));
 476     }
 477
 478     // You have to re-do the community_moderator table, reordering it.
 479     // Add the transferee to the top
 480     let creator_index = community_mods
 481       .iter()
 482       .position(|r| r.moderator.id == data.person_id)
 483       .context(location_info!())?;
 484     let creator_person = community_mods.remove(creator_index);
 485     community_mods.insert(0, creator_person);
 486
 487     // Delete all the mods
 488     let community_id = data.community_id;
 489     blocking(context.pool(), move |conn| {
 490       CommunityModerator::delete_for_community(conn, community_id)
 491     })
 492     .await??;
 493
 494     // TODO: this should probably be a bulk operation
 495     // Re-add the mods, in the new order
 496     for cmod in &community_mods {
 497       let community_moderator_form = CommunityModeratorForm {
 498         community_id: cmod.community.id,
 499         person_id: cmod.moderator.id,
 500       };
 501
 502       let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 503       blocking(context.pool(), join)
 504         .await?
 505         .map_err(LemmyError::from)
 506         .map_err(|e| e.with_message("community_moderator_already_exists"))?;
 507     }
 508
 509     // Mod tables
 510     let form = ModTransferCommunityForm {
 511       mod_person_id: local_user_view.person.id,
 512       other_person_id: data.person_id,
 513       community_id: data.community_id,
 514       removed: Some(false),
 515     };
 516     blocking(context.pool(), move |conn| {
 517       ModTransferCommunity::create(conn, &form)
 518     })
 519     .await??;
 520
 521     let community_id = data.community_id;
 522     let person_id = local_user_view.person.id;
 523     let community_view = blocking(context.pool(), move |conn| {
 524       CommunityView::read(conn, community_id, Some(person_id))
 525     })
 526     .await?
 527     .map_err(LemmyError::from)
 528     .map_err(|e| e.with_message("couldnt_find_community"))?;
 529
 530     let community_id = data.community_id;
 531     let moderators = blocking(context.pool(), move |conn| {
 532       CommunityModeratorView::for_community(conn, community_id)
 533     })
 534     .await?
 535     .map_err(LemmyError::from)
 536     .map_err(|e| e.with_message("couldnt_find_community"))?;
 537
 538     // Return the jwt
 539     Ok(GetCommunityResponse {
 540       community_view,
 541       moderators,
 542       online: 0,
 543     })
 544   }
 545 }