crates/api_crud/src/community/create.rs

   1 use crate::PerformCrud;
   2 use activitypub_federation::core::{object_id::ObjectId, signatures::generate_actor_keypair};
   3 use actix_web::web::Data;
   4 use lemmy_api_common::{
   5   community::{CommunityResponse, CreateCommunity},
   6   utils::{blocking, get_local_user_view_from_jwt, is_admin},
   7 };
   8 use lemmy_apub::{
   9   generate_followers_url,
  10   generate_inbox_url,
  11   generate_local_apub_endpoint,
  12   generate_shared_inbox_url,
  13   objects::community::ApubCommunity,
  14   EndpointType,
  15 };
  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   error::LemmyError,
  34   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  35   ConnectionId,
  36 };
  37 use lemmy_websocket::LemmyContext;
  38
  39 #[async_trait::async_trait(?Send)]
  40 impl PerformCrud for CreateCommunity {
  41   type Response = CommunityResponse;
  42
  43   #[tracing::instrument(skip(context, _websocket_id))]
  44   async fn perform(
  45     &self,
  46     context: &Data<LemmyContext>,
  47     _websocket_id: Option<ConnectionId>,
  48   ) -> Result<CommunityResponse, LemmyError> {
  49     let data: &CreateCommunity = self;
  50     let local_user_view =
  51       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  52
  53     let site = blocking(context.pool(), Site::read_local_site).await??;
  54     if site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  55       return Err(LemmyError::from_message(
  56         "only_admins_can_create_communities",
  57       ));
  58     }
  59
  60     // Check to make sure the icon and banners are urls
  61     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  62     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  63
  64     check_slurs(&data.name, &context.settings().slur_regex())?;
  65     check_slurs(&data.title, &context.settings().slur_regex())?;
  66     check_slurs_opt(&data.description, &context.settings().slur_regex())?;
  67
  68     if !is_valid_actor_name(&data.name, context.settings().actor_name_max_length) {
  69       return Err(LemmyError::from_message("invalid_community_name"));
  70     }
  71
  72     // Double check for duplicate community actor_ids
  73     let community_actor_id = generate_local_apub_endpoint(
  74       EndpointType::Community,
  75       &data.name,
  76       &context.settings().get_protocol_and_hostname(),
  77     )?;
  78     let community_actor_id_wrapped = ObjectId::<ApubCommunity>::new(community_actor_id.clone());
  79     let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
  80     if community_dupe.is_ok() {
  81       return Err(LemmyError::from_message("community_already_exists"));
  82     }
  83
  84     // When you create a community, make sure the user becomes a moderator and a follower
  85     let keypair = generate_actor_keypair()?;
  86
  87     let community_form = CommunityForm {
  88       name: data.name.to_owned(),
  89       title: data.title.to_owned(),
  90       description: data.description.to_owned(),
  91       icon,
  92       banner,
  93       nsfw: data.nsfw,
  94       actor_id: Some(community_actor_id.to_owned()),
  95       private_key: Some(Some(keypair.private_key)),
  96       public_key: Some(keypair.public_key),
  97       followers_url: Some(generate_followers_url(&community_actor_id)?),
  98       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
  99       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
 100       posting_restricted_to_mods: data.posting_restricted_to_mods,
 101       ..CommunityForm::default()
 102     };
 103
 104     let inserted_community = blocking(context.pool(), move |conn| {
 105       Community::create(conn, &community_form)
 106     })
 107     .await?
 108     .map_err(|e| LemmyError::from_error_message(e, "community_already_exists"))?;
 109
 110     // The community creator becomes a moderator
 111     let community_moderator_form = CommunityModeratorForm {
 112       community_id: inserted_community.id,
 113       person_id: local_user_view.person.id,
 114     };
 115
 116     let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 117     blocking(context.pool(), join)
 118       .await?
 119       .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
 120
 121     // Follow your own community
 122     let community_follower_form = CommunityFollowerForm {
 123       community_id: inserted_community.id,
 124       person_id: local_user_view.person.id,
 125       pending: false,
 126     };
 127
 128     let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
 129     blocking(context.pool(), follow)
 130       .await?
 131       .map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
 132
 133     let person_id = local_user_view.person.id;
 134     let community_view = blocking(context.pool(), move |conn| {
 135       CommunityView::read(conn, inserted_community.id, Some(person_id))
 136     })
 137     .await??;
 138
 139     Ok(CommunityResponse { community_view })
 140   }
 141 }