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 =
  49       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  50
  51     let site = blocking(context.pool(), move |conn| Site::read(conn, 0)).await??;
  52     if site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  53       return Err(ApiError::err("only_admins_can_create_communities").into());
  54     }
  55
  56     check_slurs(&data.name, &context.settings().slur_regex())?;
  57     check_slurs(&data.title, &context.settings().slur_regex())?;
  58     check_slurs_opt(&data.description, &context.settings().slur_regex())?;
  59
  60     if !is_valid_actor_name(&data.name, context.settings().actor_name_max_length) {
  61       return Err(ApiError::err("invalid_community_name").into());
  62     }
  63
  64     // Double check for duplicate community actor_ids
  65     let community_actor_id = generate_apub_endpoint(
  66       EndpointType::Community,
  67       &data.name,
  68       &context.settings().get_protocol_and_hostname(),
  69     )?;
  70     let actor_id_cloned = community_actor_id.to_owned();
  71     let community_dupe = blocking(context.pool(), move |conn| {
  72       Community::read_from_apub_id(conn, &actor_id_cloned)
  73     })
  74     .await?;
  75     if community_dupe.is_ok() {
  76       return Err(ApiError::err("community_already_exists").into());
  77     }
  78
  79     // Check to make sure the icon and banners are urls
  80     let icon = diesel_option_overwrite_to_url(&data.icon)?;
  81     let banner = diesel_option_overwrite_to_url(&data.banner)?;
  82
  83     // When you create a community, make sure the user becomes a moderator and a follower
  84     let keypair = generate_actor_keypair()?;
  85
  86     let community_form = CommunityForm {
  87       name: data.name.to_owned(),
  88       title: data.title.to_owned(),
  89       description: data.description.to_owned(),
  90       icon,
  91       banner,
  92       nsfw: data.nsfw,
  93       actor_id: Some(community_actor_id.to_owned()),
  94       private_key: Some(keypair.private_key),
  95       public_key: Some(keypair.public_key),
  96       followers_url: Some(generate_followers_url(&community_actor_id)?),
  97       inbox_url: Some(generate_inbox_url(&community_actor_id)?),
  98       shared_inbox_url: Some(Some(generate_shared_inbox_url(&community_actor_id)?)),
  99       ..CommunityForm::default()
 100     };
 101
 102     let inserted_community = blocking(context.pool(), move |conn| {
 103       Community::create(conn, &community_form)
 104     })
 105     .await?
 106     .map_err(|_| ApiError::err("community_already_exists"))?;
 107
 108     // The community creator becomes a moderator
 109     let community_moderator_form = CommunityModeratorForm {
 110       community_id: inserted_community.id,
 111       person_id: local_user_view.person.id,
 112     };
 113
 114     let join = move |conn: &'_ _| CommunityModerator::join(conn, &community_moderator_form);
 115     if blocking(context.pool(), join).await?.is_err() {
 116       return Err(ApiError::err("community_moderator_already_exists").into());
 117     }
 118
 119     // Follow your own community
 120     let community_follower_form = CommunityFollowerForm {
 121       community_id: inserted_community.id,
 122       person_id: local_user_view.person.id,
 123       pending: false,
 124     };
 125
 126     let follow = move |conn: &'_ _| CommunityFollower::follow(conn, &community_follower_form);
 127     if blocking(context.pool(), follow).await?.is_err() {
 128       return Err(ApiError::err("community_follower_already_exists").into());
 129     }
 130
 131     let person_id = local_user_view.person.id;
 132     let community_view = blocking(context.pool(), move |conn| {
 133       CommunityView::read(conn, inserted_community.id, Some(person_id))
 134     })
 135     .await??;
 136
 137     Ok(CommunityResponse { community_view })
 138   }
 139 }