crates/api_crud/src/community/create.rs

   1 use crate::PerformCrud;
   2 use actix_web::web::Data;
   3 use lemmy_api_common::{
   4   community::{CommunityResponse, CreateCommunity},
   5   utils::{blocking, check_image_has_local_domain, get_local_user_view_from_jwt, is_admin},
   6 };
   7 use lemmy_apub::{
   8   generate_followers_url,
   9   generate_inbox_url,
  10   generate_local_apub_endpoint,
  11   generate_shared_inbox_url,
  12   objects::community::ApubCommunity,
  13   EndpointType,
  14 };
  15 use lemmy_apub_lib::object_id::ObjectId;
  16 use lemmy_db_schema::{
  17   source::{
  18     community::{
  19       Community,
  20       CommunityFollower,
  21       CommunityFollowerForm,
  22       CommunityForm,
  23       CommunityModerator,
  24       CommunityModeratorForm,
  25     },
  26     site::Site,
  27   },
  28   traits::{Crud, Followable, Joinable},
  29   utils::diesel_option_overwrite_to_url,
  30 };
  31 use lemmy_db_views_actor::structs::CommunityView;
  32 use lemmy_utils::{
  33   apub::generate_actor_keypair,
  34   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  35   ConnectionId,
  36   LemmyError,
  37 };
  38 use lemmy_websocket::LemmyContext;
  39
  40 #[async_trait::async_trait(?Send)]
  41 impl PerformCrud for CreateCommunity {
  42   type Response = CommunityResponse;
  43
  44   #[tracing::instrument(skip(context, _websocket_id))]
  45   async fn perform(
  46     &self,
  47     context: &Data<LemmyContext>,
  48     _websocket_id: Option<ConnectionId>,
  49   ) -> Result<CommunityResponse, LemmyError> {
  50     let data: &CreateCommunity = self;
  51     let local_user_view =
  52       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  53
  54     let site = blocking(context.pool(), Site::read_local_site).await??;
  55     if site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  56       return Err(LemmyError::from_message(
  57         "only_admins_can_create_communities",
  58       ));
  59     }
  60
  61     // Check to make sure the icon and banners are urls
  62     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  63     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  64
  65     check_slurs(&data.name, &context.settings().slur_regex())?;
  66     check_slurs(&data.title, &context.settings().slur_regex())?;
  67     check_slurs_opt(&data.description, &context.settings().slur_regex())?;
  68     check_image_has_local_domain(icon.as_ref().unwrap_or(&None))?;
  69     check_image_has_local_domain(banner.as_ref().unwrap_or(&None))?;
  70
  71     if !is_valid_actor_name(&data.name, context.settings().actor_name_max_length) {
  72       return Err(LemmyError::from_message("invalid_community_name"));
  73     }
  74
  75     // Double check for duplicate community actor_ids
  76     let community_actor_id = generate_local_apub_endpoint(
  77       EndpointType::Community,
  78       &data.name,
  79       &context.settings().get_protocol_and_hostname(),
  80     )?;
  81     let community_actor_id_wrapped = ObjectId::<ApubCommunity>::new(community_actor_id.clone());
  82     let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
  83     if community_dupe.is_ok() {
  84       return Err(LemmyError::from_message("community_already_exists"));
  85     }
  86
  87     // When you create a community, make sure the user becomes a moderator and a follower
  88     let keypair = generate_actor_keypair()?;
  89
  90     let community_form = CommunityForm {
  91       name: data.name.to_owned(),
  92       title: data.title.to_owned(),
  93       description: data.description.to_owned(),
  94       icon,
  95       banner,
  96       nsfw: data.nsfw,
  97       actor_id: Some(community_actor_id.to_owned()),
  98       private_key: Some(Some(keypair.private_key)),
  99       public_key: keypair.public_key,
 100       followers_url: Some(generate_followers_url(&community_actor_id)?),
 101       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
 102       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
 103       posting_restricted_to_mods: data.posting_restricted_to_mods,
 104       ..CommunityForm::default()
 105     };
 106
 107     let inserted_community = blocking(context.pool(), move |conn| {
 108       Community::create(conn, &community_form)
 109     })
 110     .await?
 111     .map_err(|e| LemmyError::from_error_message(e, "community_already_exists"))?;
 112
 113     // The community creator becomes a moderator
 114     let community_moderator_form = CommunityModeratorForm {
 115       community_id: inserted_community.id,
 116       person_id: local_user_view.person.id,
 117     };
 118
 119     let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 120     blocking(context.pool(), join)
 121       .await?
 122       .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
 123
 124     // Follow your own community
 125     let community_follower_form = CommunityFollowerForm {
 126       community_id: inserted_community.id,
 127       person_id: local_user_view.person.id,
 128       pending: false,
 129     };
 130
 131     let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
 132     blocking(context.pool(), follow)
 133       .await?
 134       .map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
 135
 136     let person_id = local_user_view.person.id;
 137     let community_view = blocking(context.pool(), move |conn| {
 138       CommunityView::read(conn, inserted_community.id, Some(person_id))
 139     })
 140     .await??;
 141
 142     Ok(CommunityResponse { community_view })
 143   }
 144 }