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   objects::community::ApubCommunity,
  16   EndpointType,
  17 };
  18 use lemmy_db_schema::{
  19   diesel_option_overwrite_to_url,
  20   source::{
  21     community::{
  22       Community,
  23       CommunityFollower,
  24       CommunityFollowerForm,
  25       CommunityForm,
  26       CommunityModerator,
  27       CommunityModeratorForm,
  28     },
  29     site::Site,
  30   },
  31   traits::{Crud, Followable, Joinable},
  32 };
  33 use lemmy_db_views_actor::community_view::CommunityView;
  34 use lemmy_utils::{
  35   apub::generate_actor_keypair,
  36   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  37   ApiError,
  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   async fn perform(
  48     &self,
  49     context: &Data<LemmyContext>,
  50     _websocket_id: Option<ConnectionId>,
  51   ) -> Result<CommunityResponse, LemmyError> {
  52     let data: &CreateCommunity = self;
  53     let local_user_view =
  54       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  55
  56     let site = blocking(context.pool(), move |conn| Site::read(conn, 0)).await??;
  57     if site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  58       return Err(ApiError::err_plain("only_admins_can_create_communities").into());
  59     }
  60
  61     check_slurs(&data.name, &context.settings().slur_regex())?;
  62     check_slurs(&data.title, &context.settings().slur_regex())?;
  63     check_slurs_opt(&data.description, &context.settings().slur_regex())?;
  64
  65     if !is_valid_actor_name(&data.name, context.settings().actor_name_max_length) {
  66       return Err(ApiError::err_plain("invalid_community_name").into());
  67     }
  68
  69     // Double check for duplicate community actor_ids
  70     let community_actor_id = generate_apub_endpoint(
  71       EndpointType::Community,
  72       &data.name,
  73       &context.settings().get_protocol_and_hostname(),
  74     )?;
  75     let community_actor_id_wrapped = ObjectId::<ApubCommunity>::new(community_actor_id.clone());
  76     let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
  77     if community_dupe.is_ok() {
  78       return Err(ApiError::err_plain("community_already_exists").into());
  79     }
  80
  81     // Check to make sure the icon and banners are urls
  82     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  83     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  84
  85     // When you create a community, make sure the user becomes a moderator and a follower
  86     let keypair = generate_actor_keypair()?;
  87
  88     let community_form = CommunityForm {
  89       name: data.name.to_owned(),
  90       title: data.title.to_owned(),
  91       description: data.description.to_owned(),
  92       icon,
  93       banner,
  94       nsfw: data.nsfw,
  95       actor_id: Some(community_actor_id.to_owned()),
  96       private_key: Some(keypair.private_key),
  97       public_key: Some(keypair.public_key),
  98       followers_url: Some(generate_followers_url(&community_actor_id)?),
  99       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
 100       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
 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| ApiError::err("community_already_exists", e))?;
 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     if blocking(context.pool(), join).await?.is_err() {
 118       return Err(ApiError::err_plain("community_moderator_already_exists").into());
 119     }
 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     if blocking(context.pool(), follow).await?.is_err() {
 130       return Err(ApiError::err_plain("community_follower_already_exists").into());
 131     }
 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 }