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   generate_followers_url,
   7   generate_inbox_url,
   8   generate_local_apub_endpoint,
   9   generate_shared_inbox_url,
  10   utils::{get_local_user_view_from_jwt, is_admin, local_site_to_slur_regex},
  11   EndpointType,
  12   LemmyContext,
  13 };
  14 use lemmy_apub::objects::community::ApubCommunity;
  15 use lemmy_db_schema::{
  16   source::community::{
  17     Community,
  18     CommunityFollower,
  19     CommunityFollowerForm,
  20     CommunityInsertForm,
  21     CommunityModerator,
  22     CommunityModeratorForm,
  23   },
  24   traits::{Crud, Followable, Joinable},
  25   utils::diesel_option_overwrite_to_url_create,
  26 };
  27 use lemmy_db_views::structs::SiteView;
  28 use lemmy_db_views_actor::structs::CommunityView;
  29 use lemmy_utils::{
  30   error::LemmyError,
  31   utils::{check_slurs, check_slurs_opt, is_valid_actor_name},
  32   ConnectionId,
  33 };
  34
  35 #[async_trait::async_trait(?Send)]
  36 impl PerformCrud for CreateCommunity {
  37   type Response = CommunityResponse;
  38
  39   #[tracing::instrument(skip(context, _websocket_id))]
  40   async fn perform(
  41     &self,
  42     context: &Data<LemmyContext>,
  43     _websocket_id: Option<ConnectionId>,
  44   ) -> Result<CommunityResponse, LemmyError> {
  45     let data: &CreateCommunity = self;
  46     let local_user_view =
  47       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  48     let site_view = SiteView::read_local(context.pool()).await?;
  49     let local_site = site_view.local_site;
  50
  51     if local_site.community_creation_admin_only && is_admin(&local_user_view).is_err() {
  52       return Err(LemmyError::from_message(
  53         "only_admins_can_create_communities",
  54       ));
  55     }
  56
  57     // Check to make sure the icon and banners are urls
  58     let icon = diesel_option_overwrite_to_url_create(&data.icon)?;
  59     let banner = diesel_option_overwrite_to_url_create(&data.banner)?;
  60
  61     let slur_regex = local_site_to_slur_regex(&local_site);
  62     check_slurs(&data.name, &slur_regex)?;
  63     check_slurs(&data.title, &slur_regex)?;
  64     check_slurs_opt(&data.description, &slur_regex)?;
  65
  66     if !is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize) {
  67       return Err(LemmyError::from_message("invalid_community_name"));
  68     }
  69
  70     // Double check for duplicate community actor_ids
  71     let community_actor_id = generate_local_apub_endpoint(
  72       EndpointType::Community,
  73       &data.name,
  74       &context.settings().get_protocol_and_hostname(),
  75     )?;
  76     let community_actor_id_wrapped = ObjectId::<ApubCommunity>::new(community_actor_id.clone());
  77     let community_dupe = community_actor_id_wrapped.dereference_local(context).await;
  78     if community_dupe.is_ok() {
  79       return Err(LemmyError::from_message("community_already_exists"));
  80     }
  81
  82     // When you create a community, make sure the user becomes a moderator and a follower
  83     let keypair = generate_actor_keypair()?;
  84
  85     let community_form = CommunityInsertForm::builder()
  86       .name(data.name.clone())
  87       .title(data.title.clone())
  88       .description(data.description.clone())
  89       .icon(icon)
  90       .banner(banner)
  91       .nsfw(data.nsfw)
  92       .actor_id(Some(community_actor_id.clone()))
  93       .private_key(Some(keypair.private_key))
  94       .public_key(keypair.public_key)
  95       .followers_url(Some(generate_followers_url(&community_actor_id)?))
  96       .inbox_url(Some(generate_inbox_url(&community_actor_id)?))
  97       .shared_inbox_url(Some(generate_shared_inbox_url(&community_actor_id)?))
  98       .posting_restricted_to_mods(data.posting_restricted_to_mods)
  99       .instance_id(site_view.site.instance_id)
 100       .build();
 101
 102     let inserted_community = Community::create(context.pool(), &community_form)
 103       .await
 104       .map_err(|e| LemmyError::from_error_message(e, "community_already_exists"))?;
 105
 106     // The community creator becomes a moderator
 107     let community_moderator_form = CommunityModeratorForm {
 108       community_id: inserted_community.id,
 109       person_id: local_user_view.person.id,
 110     };
 111
 112     CommunityModerator::join(context.pool(), &community_moderator_form)
 113       .await
 114       .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
 115
 116     // Follow your own community
 117     let community_follower_form = CommunityFollowerForm {
 118       community_id: inserted_community.id,
 119       person_id: local_user_view.person.id,
 120       pending: false,
 121     };
 122
 123     CommunityFollower::follow(context.pool(), &community_follower_form)
 124       .await
 125       .map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
 126
 127     let person_id = local_user_view.person.id;
 128     let community_view =
 129       CommunityView::read(context.pool(), inserted_community.id, Some(person_id)).await?;
 130
 131     Ok(CommunityResponse { community_view })
 132   }
 133 }