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   is_admin,
   8 };
   9 use lemmy_apub::{
  10   fetcher::object_id::ObjectId,
  11   generate_apub_endpoint,
  12   generate_followers_url,
  13   generate_inbox_url,
  14   generate_shared_inbox_url,
  15   EndpointType,
  16 };
  17 use lemmy_db_queries::{diesel_option_overwrite_to_url, Crud, Followable, Joinable};
  18 use lemmy_db_schema::source::{
  19   community::{
  20     Community,
  21     CommunityFollower,
  22     CommunityFollowerForm,
  23     CommunityForm,
  24     CommunityModerator,
  25     CommunityModeratorForm,
  26   },
  27   site::Site,
  28 };
  29 use lemmy_db_views_actor::community_view::CommunityView;
  30 use lemmy_utils::{
  31   apub::generate_actor_keypair,
  32   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  33   ApiError,
  34   ConnectionId,
  35   LemmyError,
  36 };
  37 use lemmy_websocket::LemmyContext;
  38
  39 #[async_trait::async_trait(?Send)]
  40 impl PerformCrud for CreateCommunity {
  41   type Response = CommunityResponse;
  42
  43   async fn perform(
  44     &self,
  45     context: &Data<LemmyContext>,
  46     _websocket_id: Option<ConnectionId>,
  47   ) -> Result<CommunityResponse, LemmyError> {
  48     let data: &CreateCommunity = self;
  49     let local_user_view =
  50       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  51
  52     let site = blocking(context.pool(), move |conn| Site::read(conn, 0)).await??;
  53     if site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  54       return Err(ApiError::err_plain("only_admins_can_create_communities").into());
  55     }
  56
  57     check_slurs(&data.name, &context.settings().slur_regex())?;
  58     check_slurs(&data.title, &context.settings().slur_regex())?;
  59     check_slurs_opt(&data.description, &context.settings().slur_regex())?;
  60
  61     if !is_valid_actor_name(&data.name, context.settings().actor_name_max_length) {
  62       return Err(ApiError::err_plain("invalid_community_name").into());
  63     }
  64
  65     // Double check for duplicate community actor_ids
  66     let community_actor_id = generate_apub_endpoint(
  67       EndpointType::Community,
  68       &data.name,
  69       &context.settings().get_protocol_and_hostname(),
  70     )?;
  71     let community_actor_id_wrapped = ObjectId::<Community>::new(community_actor_id.clone());
  72     let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
  73     if community_dupe.is_ok() {
  74       return Err(ApiError::err_plain("community_already_exists").into());
  75     }
  76
  77     // Check to make sure the icon and banners are urls
  78     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  79     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  80
  81     // When you create a community, make sure the user becomes a moderator and a follower
  82     let keypair = generate_actor_keypair()?;
  83
  84     let community_form = CommunityForm {
  85       name: data.name.to_owned(),
  86       title: data.title.to_owned(),
  87       description: data.description.to_owned(),
  88       icon,
  89       banner,
  90       nsfw: data.nsfw,
  91       actor_id: Some(community_actor_id.to_owned()),
  92       private_key: Some(keypair.private_key),
  93       public_key: Some(keypair.public_key),
  94       followers_url: Some(generate_followers_url(&community_actor_id)?),
  95       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
  96       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
  97       ..CommunityForm::default()
  98     };
  99
 100     let inserted_community = blocking(context.pool(), move |conn| {
 101       Community::create(conn, &community_form)
 102     })
 103     .await?
 104     .map_err(|e| ApiError::err("community_already_exists", e))?;
 105
 106     // The community creator becomes a moderator
 107     let community_moderator_form = CommunityModeratorForm {
 108       community_id: inserted_community.id,
 109       person_id: local_user_view.person.id,
 110     };
 111
 112     let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 113     if blocking(context.pool(), join).await?.is_err() {
 114       return Err(ApiError::err_plain("community_moderator_already_exists").into());
 115     }
 116
 117     // Follow your own community
 118     let community_follower_form = CommunityFollowerForm {
 119       community_id: inserted_community.id,
 120       person_id: local_user_view.person.id,
 121       pending: false,
 122     };
 123
 124     let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
 125     if blocking(context.pool(), follow).await?.is_err() {
 126       return Err(ApiError::err_plain("community_follower_already_exists").into());
 127     }
 128
 129     let person_id = local_user_view.person.id;
 130     let community_view = blocking(context.pool(), move |conn| {
 131       CommunityView::read(conn, inserted_community.id, Some(person_id))
 132     })
 133     .await??;
 134
 135     Ok(CommunityResponse { community_view })
 136   }
 137 }