crates/api_crud/src/community/create.rs

   1 use crate::PerformCrud;
   2 use activitypub_federation::core::signatures::generate_actor_keypair;
   3 use actix_web::web::Data;
   4 use lemmy_api_common::{
   5   community::{CommunityResponse, CreateCommunity},
   6   context::LemmyContext,
   7   utils::{
   8     generate_followers_url,
   9     generate_inbox_url,
  10     generate_local_apub_endpoint,
  11     generate_shared_inbox_url,
  12     get_local_user_view_from_jwt,
  13     is_admin,
  14     local_site_to_slur_regex,
  15     EndpointType,
  16   },
  17 };
  18 use lemmy_db_schema::{
  19   source::community::{
  20     Community,
  21     CommunityFollower,
  22     CommunityFollowerForm,
  23     CommunityInsertForm,
  24     CommunityModerator,
  25     CommunityModeratorForm,
  26   },
  27   traits::{ApubActor, Crud, Followable, Joinable},
  28   utils::diesel_option_overwrite_to_url_create,
  29 };
  30 use lemmy_db_views::structs::SiteView;
  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
  38 #[async_trait::async_trait(?Send)]
  39 impl PerformCrud for CreateCommunity {
  40   type Response = CommunityResponse;
  41
  42   #[tracing::instrument(skip(context, _websocket_id))]
  43   async fn perform(
  44     &self,
  45     context: &Data<LemmyContext>,
  46     _websocket_id: Option<ConnectionId>,
  47   ) -> Result<CommunityResponse, LemmyError> {
  48     let data: &CreateCommunity = self;
  49     let local_user_view =
  50       get_local_user_view_from_jwt(&data.auth, context.pool(), context.secret()).await?;
  51     let site_view = SiteView::read_local(context.pool()).await?;
  52     let local_site = site_view.local_site;
  53
  54     if local_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_create(&data.icon)?;
  62     let banner = diesel_option_overwrite_to_url_create(&data.banner)?;
  63
  64     let slur_regex = local_site_to_slur_regex(&local_site);
  65     check_slurs(&data.name, &slur_regex)?;
  66     check_slurs(&data.title, &slur_regex)?;
  67     check_slurs_opt(&data.description, &slur_regex)?;
  68
  69     if !is_valid_actor_name(&data.name, local_site.actor_name_max_length as usize) {
  70       return Err(LemmyError::from_message("invalid_community_name"));
  71     }
  72
  73     // Double check for duplicate community actor_ids
  74     let community_actor_id = generate_local_apub_endpoint(
  75       EndpointType::Community,
  76       &data.name,
  77       &context.settings().get_protocol_and_hostname(),
  78     )?;
  79     let community_dupe = Community::read_from_apub_id(context.pool(), &community_actor_id).await?;
  80     if community_dupe.is_some() {
  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.clone())
  89       .title(data.title.clone())
  90       .description(data.description.clone())
  91       .icon(icon)
  92       .banner(banner)
  93       .nsfw(data.nsfw)
  94       .actor_id(Some(community_actor_id.clone()))
  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 = Community::create(context.pool(), &community_form)
 105       .await
 106       .map_err(|e| LemmyError::from_error_message(e, "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     CommunityModerator::join(context.pool(), &community_moderator_form)
 115       .await
 116       .map_err(|e| LemmyError::from_error_message(e, "community_moderator_already_exists"))?;
 117
 118     // Follow your own community
 119     let community_follower_form = CommunityFollowerForm {
 120       community_id: inserted_community.id,
 121       person_id: local_user_view.person.id,
 122       pending: false,
 123     };
 124
 125     CommunityFollower::follow(context.pool(), &community_follower_form)
 126       .await
 127       .map_err(|e| LemmyError::from_error_message(e, "community_follower_already_exists"))?;
 128
 129     let person_id = local_user_view.person.id;
 130     let community_view =
 131       CommunityView::read(context.pool(), inserted_community.id, Some(person_id)).await?;
 132
 133     Ok(CommunityResponse { community_view })
 134   }
 135 }