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, local_site_to_slur_regex},
   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::community::{
  18     Community,
  19     CommunityFollower,
  20     CommunityFollowerForm,
  21     CommunityInsertForm,
  22     CommunityModerator,
  23     CommunityModeratorForm,
  24   },
  25   traits::{Crud, Followable, Joinable},
  26   utils::diesel_option_overwrite_to_url_create,
  27 };
  28 use lemmy_db_views::structs::SiteView;
  29 use lemmy_db_views_actor::structs::CommunityView;
  30 use lemmy_utils::{
  31   error::LemmyError,
  32   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  33   ConnectionId,
  34 };
  35 use lemmy_websocket::LemmyContext;
  36
  37 #[async_trait::async_trait(?Send)]
  38 impl PerformCrud for CreateCommunity {
  39   type Response = CommunityResponse;
  40
  41   #[tracing::instrument(skip(context, _websocket_id))]
  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     let site_view = blocking(context.pool(), SiteView::read_local).await??;
  51     let local_site = site_view.local_site;
  52
  53     if local_site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  54       return Err(LemmyError::from_message(
  55         "only_admins_can_create_communities",
  56       ));
  57     }
  58
  59     // Check to make sure the icon and banners are urls
  60     let icon = diesel_option_overwrite_to_url_create(&data.icon)?;
  61     let banner = diesel_option_overwrite_to_url_create(&data.banner)?;
  62
  63     let slur_regex = local_site_to_slur_regex(&local_site);
  64     check_slurs(&data.name, &slur_regex)?;
  65     check_slurs(&data.title, &slur_regex)?;
  66     check_slurs_opt(&data.description, &slur_regex)?;
  67
  68     if !is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize) {
  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 = CommunityInsertForm::builder()
  88       .name(data.name.to_owned())
  89       .title(data.title.to_owned())
  90       .description(data.description.to_owned())
  91       .icon(icon)
  92       .banner(banner)
  93       .nsfw(data.nsfw)
  94       .actor_id(Some(community_actor_id.to_owned()))
  95       .private_key(Some(keypair.private_key))
  96       .public_key(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(generate_shared_inbox_url(&community_actor_id)?))
 100       .posting_restricted_to_mods(data.posting_restricted_to_mods)
 101       .instance_id(site_view.site.instance_id)
 102       .build();
 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: &mut _| 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: &mut _| 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 }