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