crates/api_crud/src/community/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   blocking,
   5   community::{CommunityResponse, CreateCommunity},
   6   get_local_user_view_from_jwt,
   7 };
   8 use lemmy_apub::{
   9   generate_apub_endpoint,
  10   generate_followers_url,
  11   generate_inbox_url,
  12   generate_shared_inbox_url,
  13   EndpointType,
  14 };
  15 use lemmy_db_queries::{diesel_option_overwrite_to_url, ApubObject, Crud, Followable, Joinable};
  16 use lemmy_db_schema::source::community::{
  17   Community,
  18   CommunityFollower,
  19   CommunityFollowerForm,
  20   CommunityForm,
  21   CommunityModerator,
  22   CommunityModeratorForm,
  23 };
  24 use lemmy_db_views_actor::community_view::CommunityView;
  25 use lemmy_utils::{
  26   apub::generate_actor_keypair,
  27   utils::{check_slurs, check_slurs_opt, is_valid_community_name},
  28   ApiError,
  29   ConnectionId,
  30   LemmyError,
  31 };
  32 use lemmy_websocket::LemmyContext;
  33
  34 #[async_trait::async_trait(?Send)]
  35 impl PerformCrud for CreateCommunity {
  36   type Response = CommunityResponse;
  37
  38   async fn perform(
  39     &self,
  40     context: &Data<LemmyContext>,
  41     _websocket_id: Option<ConnectionId>,
  42   ) -> Result<CommunityResponse, LemmyError> {
  43     let data: &CreateCommunity = &self;
  44     let local_user_view = get_local_user_view_from_jwt(&data.auth, context.pool()).await?;
  45
  46     check_slurs(&data.name)?;
  47     check_slurs(&data.title)?;
  48     check_slurs_opt(&data.description)?;
  49
  50     if !is_valid_community_name(&data.name) {
  51       return Err(ApiError::err("invalid_community_name").into());
  52     }
  53
  54     // Double check for duplicate community actor_ids
  55     let community_actor_id = generate_apub_endpoint(EndpointType::Community, &data.name)?;
  56     let actor_id_cloned = community_actor_id.to_owned();
  57     let community_dupe = blocking(context.pool(), move |conn| {
  58       Community::read_from_apub_id(conn, &actor_id_cloned)
  59     })
  60     .await?;
  61     if community_dupe.is_ok() {
  62       return Err(ApiError::err("community_already_exists").into());
  63     }
  64
  65     // Check to make sure the icon and banners are urls
  66     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  67     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  68
  69     // When you create a community, make sure the user becomes a moderator and a follower
  70     let keypair = generate_actor_keypair()?;
  71
  72     let community_form = CommunityForm {
  73       name: data.name.to_owned(),
  74       title: data.title.to_owned(),
  75       description: data.description.to_owned(),
  76       icon,
  77       banner,
  78       creator_id: local_user_view.person.id,
  79       nsfw: data.nsfw,
  80       actor_id: Some(community_actor_id.to_owned()),
  81       private_key: Some(keypair.private_key),
  82       public_key: Some(keypair.public_key),
  83       followers_url: Some(generate_followers_url(&community_actor_id)?),
  84       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
  85       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
  86       ..CommunityForm::default()
  87     };
  88
  89     let inserted_community = match blocking(context.pool(), move |conn| {
  90       Community::create(conn, &community_form)
  91     })
  92     .await?
  93     {
  94       Ok(community) => community,
  95       Err(_e) => return Err(ApiError::err("community_already_exists").into()),
  96     };
  97
  98     // The community creator becomes a moderator
  99     let community_moderator_form = CommunityModeratorForm {
 100       community_id: inserted_community.id,
 101       person_id: local_user_view.person.id,
 102     };
 103
 104     let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 105     if blocking(context.pool(), join).await?.is_err() {
 106       return Err(ApiError::err("community_moderator_already_exists").into());
 107     }
 108
 109     // Follow your own community
 110     let community_follower_form = CommunityFollowerForm {
 111       community_id: inserted_community.id,
 112       person_id: local_user_view.person.id,
 113       pending: false,
 114     };
 115
 116     let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
 117     if blocking(context.pool(), follow).await?.is_err() {
 118       return Err(ApiError::err("community_follower_already_exists").into());
 119     }
 120
 121     let person_id = local_user_view.person.id;
 122     let community_view = blocking(context.pool(), move |conn| {
 123       CommunityView::read(conn, inserted_community.id, Some(person_id))
 124     })
 125     .await??;
 126
 127     Ok(CommunityResponse { community_view })
 128   }
 129 }