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     site::Site,
  48   },
  49   traits::{Bannable, Blockable, Crud, Followable, Joinable},
  50 };
  51 use lemmy_db_views::comment_view::CommentQueryBuilder;
  52 use lemmy_db_views_actor::{
  53   community_moderator_view::CommunityModeratorView,
  54   community_view::CommunityView,
  55   person_view::PersonViewSafe,
  56 };
  57 use lemmy_utils::{location_info, utils::naive_from_unix, ConnectionId, LemmyError};
  58 use lemmy_websocket::{messages::SendCommunityRoomMessage, LemmyContext, UserOperation};
  59
  60 #[async_trait::async_trait(?Send)]
  61 impl Perform for FollowCommunity {
  62   type Response = CommunityResponse;
  63
  64   #[tracing::instrument(skip(context, _websocket_id))]
  65   async fn perform(
  66     &self,
  67     context: &Data<LemmyContext>,
  68     _websocket_id: Option<ConnectionId>,
  69   ) -> Result<CommunityResponse, LemmyError> {
  70     let data: &FollowCommunity = self;
  71     let local_user_view =
  72       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  73
  74     let community_id = data.community_id;
  75     let community: ApubCommunity = blocking(context.pool(), move |conn| {
  76       Community::read(conn, community_id)
  77     })
  78     .await??
  79     .into();
  80     let community_follower_form = CommunityFollowerForm {
  81       community_id: data.community_id,
  82       person_id: local_user_view.person.id,
  83       pending: false,
  84     };
  85
  86     if community.local {
  87       if data.follow {
  88         check_community_ban(local_user_view.person.id, community_id, context.pool()).await?;
  89         check_community_deleted_or_removed(community_id, context.pool()).await?;
  90
  91         let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
  92         blocking(context.pool(), follow)
  93           .await?
  94           .map_err(LemmyError::from)
  95           .map_err(|e| e.with_message("community_follower_already_exists"))?;
  96       } else {
  97         let unfollow =
  98           move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
  99         blocking(context.pool(), unfollow)
 100           .await?
 101           .map_err(LemmyError::from)
 102           .map_err(|e| e.with_message("community_follower_already_exists"))?;
 103       }
 104     } else if data.follow {
 105       // Dont actually add to the community followers here, because you need
 106       // to wait for the accept
 107       FollowCommunityApub::send(&local_user_view.person.clone().into(), &community, context)
 108         .await?;
 109     } else {
 110       UndoFollowCommunity::send(&local_user_view.person.clone().into(), &community, context)
 111         .await?;
 112       let unfollow = move |conn: &'_ _| CommunityFollower::unfollow(conn, &community_follower_form);
 113       blocking(context.pool(), unfollow)
 114         .await?
 115         .map_err(LemmyError::from)
 116         .map_err(|e| e.with_message("community_follower_already_exists"))?;
 117     }
 118
 119     let community_id = data.community_id;
 120     let person_id = local_user_view.person.id;
 121     let mut community_view = blocking(context.pool(), move |conn| {
 122       CommunityView::read(conn, community_id, Some(person_id))
 123     })
 124     .await??;
 125
 126     // TODO: this needs to return a "pending" state, until Accept is received from the remote server
 127     // For now, just assume that remote follows are accepted.
 128     // Otherwise, the subscribed will be null
 129     if !community.local {
 130       community_view.subscribed = data.follow;
 131     }
 132
 133     Ok(CommunityResponse { community_view })
 134   }
 135 }
 136
 137 #[async_trait::async_trait(?Send)]
 138 impl Perform for BlockCommunity {
 139   type Response = BlockCommunityResponse;
 140
 141   #[tracing::instrument(skip(context, _websocket_id))]
 142   async fn perform(
 143     &self,
 144     context: &Data<LemmyContext>,
 145     _websocket_id: Option<ConnectionId>,
 146   ) -> Result<BlockCommunityResponse, LemmyError> {
 147     let data: &BlockCommunity = self;
 148     let local_user_view =
 149       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 150
 151     let community_id = data.community_id;
 152     let person_id = local_user_view.person.id;
 153     let community_block_form = CommunityBlockForm {
 154       person_id,
 155       community_id,
 156     };
 157
 158     if data.block {
 159       let block = move |conn: &'_ _| CommunityBlock::block(conn, &community_block_form);
 160       blocking(context.pool(), block)
 161         .await?
 162         .map_err(LemmyError::from)
 163         .map_err(|e| e.with_message("community_block_already_exists"))?;
 164
 165       // Also, unfollow the community, and send a federated unfollow
 166       let community_follower_form = CommunityFollowerForm {
 167         community_id: data.community_id,
 168         person_id,
 169         pending: false,
 170       };
 171       blocking(context.pool(), move |conn: &'_ _| {
 172         CommunityFollower::unfollow(conn, &community_follower_form)
 173       })
 174       .await?
 175       .ok();
 176       let community = blocking(context.pool(), move |conn| {
 177         Community::read(conn, community_id)
 178       })
 179       .await??;
 180       UndoFollowCommunity::send(&local_user_view.person.into(), &community.into(), context).await?;
 181     } else {
 182       let unblock = move |conn: &'_ _| CommunityBlock::unblock(conn, &community_block_form);
 183       blocking(context.pool(), unblock)
 184         .await?
 185         .map_err(LemmyError::from)
 186         .map_err(|e| e.with_message("community_block_already_exists"))?;
 187     }
 188
 189     let community_view = blocking(context.pool(), move |conn| {
 190       CommunityView::read(conn, community_id, Some(person_id))
 191     })
 192     .await??;
 193
 194     Ok(BlockCommunityResponse {
 195       blocked: data.block,
 196       community_view,
 197     })
 198   }
 199 }
 200
 201 #[async_trait::async_trait(?Send)]
 202 impl Perform for BanFromCommunity {
 203   type Response = BanFromCommunityResponse;
 204
 205   #[tracing::instrument(skip(context, websocket_id))]
 206   async fn perform(
 207     &self,
 208     context: &Data<LemmyContext>,
 209     websocket_id: Option<ConnectionId>,
 210   ) -> Result<BanFromCommunityResponse, LemmyError> {
 211     let data: &BanFromCommunity = self;
 212     let local_user_view =
 213       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 214
 215     let community_id = data.community_id;
 216     let banned_person_id = data.person_id;
 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     };
 225
 226     let community: ApubCommunity = blocking(context.pool(), move |conn: &'_ _| {
 227       Community::read(conn, community_id)
 228     })
 229     .await??
 230     .into();
 231     let banned_person: ApubPerson = blocking(context.pool(), move |conn: &'_ _| {
 232       Person::read(conn, banned_person_id)
 233     })
 234     .await??
 235     .into();
 236
 237     if data.ban {
 238       let ban = move |conn: &'_ _| CommunityPersonBan::ban(conn, &community_user_ban_form);
 239       blocking(context.pool(), ban)
 240         .await?
 241         .map_err(LemmyError::from)
 242         .map_err(|e| e.with_message("community_user_already_banned"))?;
 243
 244       // Also unsubscribe them from the community, if they are subscribed
 245       let community_follower_form = CommunityFollowerForm {
 246         community_id: data.community_id,
 247         person_id: banned_person_id,
 248         pending: false,
 249       };
 250       blocking(context.pool(), move |conn: &'_ _| {
 251         CommunityFollower::unfollow(conn, &community_follower_form)
 252       })
 253       .await?
 254       .ok();
 255
 256       BlockUserFromCommunity::send(
 257         &community,
 258         &banned_person,
 259         &local_user_view.person.clone().into(),
 260         context,
 261       )
 262       .await?;
 263     } else {
 264       let unban = move |conn: &'_ _| CommunityPersonBan::unban(conn, &community_user_ban_form);
 265       blocking(context.pool(), unban)
 266         .await?
 267         .map_err(LemmyError::from)
 268         .map_err(|e| e.with_message("community_user_already_banned"))?;
 269       UndoBlockUserFromCommunity::send(
 270         &community,
 271         &banned_person,
 272         &local_user_view.person.clone().into(),
 273         context,
 274       )
 275       .await?;
 276     }
 277
 278     // Remove/Restore their data if that's desired
 279     if data.remove_data.unwrap_or(false) {
 280       // Posts
 281       blocking(context.pool(), move |conn: &'_ _| {
 282         Post::update_removed_for_creator(conn, banned_person_id, Some(community_id), true)
 283       })
 284       .await??;
 285
 286       // Comments
 287       // TODO Diesel doesn't allow updates with joins, so this has to be a loop
 288       let comments = blocking(context.pool(), move |conn| {
 289         CommentQueryBuilder::create(conn)
 290           .creator_id(banned_person_id)
 291           .community_id(community_id)
 292           .limit(std::i64::MAX)
 293           .list()
 294       })
 295       .await??;
 296
 297       for comment_view in &comments {
 298         let comment_id = comment_view.comment.id;
 299         blocking(context.pool(), move |conn: &'_ _| {
 300           Comment::update_removed(conn, comment_id, true)
 301         })
 302         .await??;
 303       }
 304     }
 305
 306     // Mod tables
 307     // TODO eventually do correct expires
 308     let expires = data.expires.map(naive_from_unix);
 309
 310     let form = ModBanFromCommunityForm {
 311       mod_person_id: local_user_view.person.id,
 312       other_person_id: data.person_id,
 313       community_id: data.community_id,
 314       reason: data.reason.to_owned(),
 315       banned: Some(data.ban),
 316       expires,
 317     };
 318     blocking(context.pool(), move |conn| {
 319       ModBanFromCommunity::create(conn, &form)
 320     })
 321     .await??;
 322
 323     let person_id = data.person_id;
 324     let person_view = blocking(context.pool(), move |conn| {
 325       PersonViewSafe::read(conn, person_id)
 326     })
 327     .await??;
 328
 329     let res = BanFromCommunityResponse {
 330       person_view,
 331       banned: data.ban,
 332     };
 333
 334     context.chat_server().do_send(SendCommunityRoomMessage {
 335       op: UserOperation::BanFromCommunity,
 336       response: res.clone(),
 337       community_id,
 338       websocket_id,
 339     });
 340
 341     Ok(res)
 342   }
 343 }
 344
 345 #[async_trait::async_trait(?Send)]
 346 impl Perform for AddModToCommunity {
 347   type Response = AddModToCommunityResponse;
 348
 349   #[tracing::instrument(skip(context, websocket_id))]
 350   async fn perform(
 351     &self,
 352     context: &Data<LemmyContext>,
 353     websocket_id: Option<ConnectionId>,
 354   ) -> Result<AddModToCommunityResponse, LemmyError> {
 355     let data: &AddModToCommunity = self;
 356     let local_user_view =
 357       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 358
 359     let community_id = data.community_id;
 360
 361     // Verify that only mods or admins can add mod
 362     is_mod_or_admin(context.pool(), local_user_view.person.id, community_id).await?;
 363
 364     // Update in local database
 365     let community_moderator_form = CommunityModeratorForm {
 366       community_id: data.community_id,
 367       person_id: data.person_id,
 368     };
 369     if data.added {
 370       let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 371       blocking(context.pool(), join)
 372         .await?
 373         .map_err(LemmyError::from)
 374         .map_err(|e| e.with_message("community_moderator_already_exists"))?;
 375     } else {
 376       let leave = move |conn: &'_ _| CommunityModerator::leave(conn, &community_moderator_form);
 377       blocking(context.pool(), leave)
 378         .await?
 379         .map_err(LemmyError::from)
 380         .map_err(|e| e.with_message("community_moderator_already_exists"))?;
 381     }
 382
 383     // Mod tables
 384     let form = ModAddCommunityForm {
 385       mod_person_id: local_user_view.person.id,
 386       other_person_id: data.person_id,
 387       community_id: data.community_id,
 388       removed: Some(!data.added),
 389     };
 390     blocking(context.pool(), move |conn| {
 391       ModAddCommunity::create(conn, &form)
 392     })
 393     .await??;
 394
 395     // Send to federated instances
 396     let updated_mod_id = data.person_id;
 397     let updated_mod: ApubPerson = blocking(context.pool(), move |conn| {
 398       Person::read(conn, updated_mod_id)
 399     })
 400     .await??
 401     .into();
 402     let community: ApubCommunity = blocking(context.pool(), move |conn| {
 403       Community::read(conn, community_id)
 404     })
 405     .await??
 406     .into();
 407     if data.added {
 408       AddMod::send(
 409         &community,
 410         &updated_mod,
 411         &local_user_view.person.into(),
 412         context,
 413       )
 414       .await?;
 415     } else {
 416       RemoveMod::send(
 417         &community,
 418         &updated_mod,
 419         &local_user_view.person.into(),
 420         context,
 421       )
 422       .await?;
 423     }
 424
 425     // Note: in case a remote mod is added, this returns the old moderators list, it will only get
 426     //       updated once we receive an activity from the community (like `Announce/Add/Moderator`)
 427     let community_id = data.community_id;
 428     let moderators = blocking(context.pool(), move |conn| {
 429       CommunityModeratorView::for_community(conn, community_id)
 430     })
 431     .await??;
 432
 433     let res = AddModToCommunityResponse { moderators };
 434     context.chat_server().do_send(SendCommunityRoomMessage {
 435       op: UserOperation::AddModToCommunity,
 436       response: res.clone(),
 437       community_id,
 438       websocket_id,
 439     });
 440     Ok(res)
 441   }
 442 }
 443
 444 // TODO: we dont do anything for federation here, it should be updated the next time the community
 445 //       gets fetched. i hope we can get rid of the community creator role soon.
 446 #[async_trait::async_trait(?Send)]
 447 impl Perform for TransferCommunity {
 448   type Response = GetCommunityResponse;
 449
 450   #[tracing::instrument(skip(context, _websocket_id))]
 451   async fn perform(
 452     &self,
 453     context: &Data<LemmyContext>,
 454     _websocket_id: Option<ConnectionId>,
 455   ) -> Result<GetCommunityResponse, LemmyError> {
 456     let data: &TransferCommunity = self;
 457     let local_user_view =
 458       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
 459
 460     let site_creator_id = blocking(context.pool(), move |conn| {
 461       Site::read(conn, 1).map(|s| s.creator_id)
 462     })
 463     .await??;
 464
 465     let mut admins = blocking(context.pool(), PersonViewSafe::admins).await??;
 466
 467     // Making sure the site creator, if an admin, is at the top
 468     let creator_index = admins
 469       .iter()
 470       .position(|r| r.person.id == site_creator_id)
 471       .context(location_info!())?;
 472     let creator_person = admins.remove(creator_index);
 473     admins.insert(0, creator_person);
 474
 475     // Fetch the community mods
 476     let community_id = data.community_id;
 477     let mut community_mods = blocking(context.pool(), move |conn| {
 478       CommunityModeratorView::for_community(conn, community_id)
 479     })
 480     .await??;
 481
 482     // Make sure transferrer is either the top community mod, or an admin
 483     if local_user_view.person.id != community_mods[0].moderator.id
 484       && !admins
 485         .iter()
 486         .map(|a| a.person.id)
 487         .any(|x| x == local_user_view.person.id)
 488     {
 489       return Err(LemmyError::from_message("not_an_admin"));
 490     }
 491
 492     // You have to re-do the community_moderator table, reordering it.
 493     // Add the transferee to the top
 494     let creator_index = community_mods
 495       .iter()
 496       .position(|r| r.moderator.id == data.person_id)
 497       .context(location_info!())?;
 498     let creator_person = community_mods.remove(creator_index);
 499     community_mods.insert(0, creator_person);
 500
 501     // Delete all the mods
 502     let community_id = data.community_id;
 503     blocking(context.pool(), move |conn| {
 504       CommunityModerator::delete_for_community(conn, community_id)
 505     })
 506     .await??;
 507
 508     // TODO: this should probably be a bulk operation
 509     // Re-add the mods, in the new order
 510     for cmod in &community_mods {
 511       let community_moderator_form = CommunityModeratorForm {
 512         community_id: cmod.community.id,
 513         person_id: cmod.moderator.id,
 514       };
 515
 516       let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 517       blocking(context.pool(), join)
 518         .await?
 519         .map_err(LemmyError::from)
 520         .map_err(|e| e.with_message("community_moderator_already_exists"))?;
 521     }
 522
 523     // Mod tables
 524     let form = ModTransferCommunityForm {
 525       mod_person_id: local_user_view.person.id,
 526       other_person_id: data.person_id,
 527       community_id: data.community_id,
 528       removed: Some(false),
 529     };
 530     blocking(context.pool(), move |conn| {
 531       ModTransferCommunity::create(conn, &form)
 532     })
 533     .await??;
 534
 535     let community_id = data.community_id;
 536     let person_id = local_user_view.person.id;
 537     let community_view = blocking(context.pool(), move |conn| {
 538       CommunityView::read(conn, community_id, Some(person_id))
 539     })
 540     .await?
 541     .map_err(LemmyError::from)
 542     .map_err(|e| e.with_message("couldnt_find_community"))?;
 543
 544     let community_id = data.community_id;
 545     let moderators = blocking(context.pool(), move |conn| {
 546       CommunityModeratorView::for_community(conn, community_id)
 547     })
 548     .await?
 549     .map_err(LemmyError::from)
 550     .map_err(|e| e.with_message("couldnt_find_community"))?;
 551
 552     // Return the jwt
 553     Ok(GetCommunityResponse {
 554       community_view,
 555       moderators,
 556       online: 0,
 557     })
 558   }
 559 }