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   check_image_has_local_domain,
   6   community::{CommunityResponse, CreateCommunity},
   7   get_local_user_view_from_jwt,
   8   is_admin,
   9 };
  10 use lemmy_apub::{
  11   generate_followers_url,
  12   generate_inbox_url,
  13   generate_local_apub_endpoint,
  14   generate_shared_inbox_url,
  15   objects::community::ApubCommunity,
  16   EndpointType,
  17 };
  18 use lemmy_apub_lib::object_id::ObjectId;
  19 use lemmy_db_schema::{
  20   diesel_option_overwrite_to_url,
  21   source::{
  22     community::{
  23       Community,
  24       CommunityFollower,
  25       CommunityFollowerForm,
  26       CommunityForm,
  27       CommunityModerator,
  28       CommunityModeratorForm,
  29     },
  30     site::Site,
  31   },
  32   traits::{Crud, Followable, Joinable},
  33 };
  34 use lemmy_db_views_actor::community_view::CommunityView;
  35 use lemmy_utils::{
  36   apub::generate_actor_keypair,
  37   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  38   ConnectionId,
  39   LemmyError,
  40 };
  41 use lemmy_websocket::LemmyContext;
  42
  43 #[async_trait::async_trait(?Send)]
  44 impl PerformCrud for CreateCommunity {
  45   type Response = CommunityResponse;
  46
  47   #[tracing::instrument(skip(context, _websocket_id))]
  48   async fn perform(
  49     &self,
  50     context: &Data<LemmyContext>,
  51     _websocket_id: Option<ConnectionId>,
  52   ) -> Result<CommunityResponse, LemmyError> {
  53     let data: &CreateCommunity = self;
  54     let local_user_view =
  55       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  56
  57     let site = blocking(context.pool(), Site::read_local_site).await??;
  58     if site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  59       return Err(LemmyError::from_message(
  60         "only_admins_can_create_communities",
  61       ));
  62     }
  63
  64     // Check to make sure the icon and banners are urls
  65     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  66     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  67
  68     check_slurs(&data.name, &context.settings().slur_regex())?;
  69     check_slurs(&data.title, &context.settings().slur_regex())?;
  70     check_slurs_opt(&data.description, &context.settings().slur_regex())?;
  71     check_image_has_local_domain(icon.as_ref().unwrap_or(&None))?;
  72     check_image_has_local_domain(banner.as_ref().unwrap_or(&None))?;
  73
  74     if !is_valid_actor_name(&data.name, context.settings().actor_name_max_length) {
  75       return Err(LemmyError::from_message("invalid_community_name"));
  76     }
  77
  78     // Double check for duplicate community actor_ids
  79     let community_actor_id = generate_local_apub_endpoint(
  80       EndpointType::Community,
  81       &data.name,
  82       &context.settings().get_protocol_and_hostname(),
  83     )?;
  84     let community_actor_id_wrapped = ObjectId::<ApubCommunity>::new(community_actor_id.clone());
  85     let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
  86     if community_dupe.is_ok() {
  87       return Err(LemmyError::from_message("community_already_exists"));
  88     }
  89
  90     // When you create a community, make sure the user becomes a moderator and a follower
  91     let keypair = generate_actor_keypair()?;
  92
  93     let community_form = CommunityForm {
  94       name: data.name.to_owned(),
  95       title: data.title.to_owned(),
  96       description: data.description.to_owned(),
  97       icon,
  98       banner,
  99       nsfw: data.nsfw,
 100       actor_id: Some(community_actor_id.to_owned()),
 101       private_key: Some(Some(keypair.private_key)),
 102       public_key: keypair.public_key,
 103       followers_url: Some(generate_followers_url(&community_actor_id)?),
 104       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
 105       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
 106       posting_restricted_to_mods: data.posting_restricted_to_mods,
 107       ..CommunityForm::default()
 108     };
 109
 110     let inserted_community = blocking(context.pool(), move |conn| {
 111       Community::create(conn, &community_form)
 112     })
 113     .await?
 114     .map_err(|e| LemmyError::from_error_message(e, "community_already_exists"))?;
 115
 116     // The community creator becomes a moderator
 117     let community_moderator_form = CommunityModeratorForm {
 118       community_id: inserted_community.id,
 119       person_id: local_user_view.person.id,
 120     };
 121
 122     let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 123     blocking(context.pool(), join)
 124       .await?
 125       .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
 126
 127     // Follow your own community
 128     let community_follower_form = CommunityFollowerForm {
 129       community_id: inserted_community.id,
 130       person_id: local_user_view.person.id,
 131       pending: false,
 132     };
 133
 134     let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
 135     blocking(context.pool(), follow)
 136       .await?
 137       .map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
 138
 139     let person_id = local_user_view.person.id;
 140     let community_view = blocking(context.pool(), move |conn| {
 141       CommunityView::read(conn, inserted_community.id, Some(person_id))
 142     })
 143     .await??;
 144
 145     Ok(CommunityResponse { community_view })
 146   }
 147 }