crates/apub/src/objects/community.rs

   1 use crate::{
   2   extensions::{context::lemmy_context, group_extensions::GroupExtension},
   3   fetcher::{community::fetch_community_mods, user::get_or_fetch_and_upsert_user},
   4   generate_moderators_url,
   5   objects::{
   6     check_object_domain,
   7     create_tombstone,
   8     get_object_from_apub,
   9     get_source_markdown_value,
  10     set_content_and_source,
  11     FromApub,
  12     FromApubToForm,
  13     ToApub,
  14   },
  15   ActorType,
  16   GroupExt,
  17 };
  18 use activitystreams::{
  19   actor::{kind::GroupType, ApActor, Endpoints, Group},
  20   base::BaseExt,
  21   object::{ApObject, Image, Tombstone},
  22   prelude::*,
  23 };
  24 use activitystreams_ext::Ext2;
  25 use anyhow::Context;
  26 use lemmy_api_structs::blocking;
  27 use lemmy_db_queries::{DbPool, Joinable};
  28 use lemmy_db_schema::{
  29   naive_now,
  30   source::community::{Community, CommunityForm, CommunityModerator, CommunityModeratorForm},
  31   DbUrl,
  32 };
  33 use lemmy_db_views_actor::community_moderator_view::CommunityModeratorView;
  34 use lemmy_utils::{
  35   location_info,
  36   utils::{check_slurs, check_slurs_opt, convert_datetime},
  37   LemmyError,
  38 };
  39 use lemmy_websocket::LemmyContext;
  40 use url::Url;
  41
  42 #[async_trait::async_trait(?Send)]
  43 impl ToApub for Community {
  44   type ApubType = GroupExt;
  45
  46   async fn to_apub(&self, _pool: &DbPool) -> Result<GroupExt, LemmyError> {
  47     let mut group = ApObject::new(Group::new());
  48     group
  49       .set_many_contexts(lemmy_context()?)
  50       .set_id(self.actor_id.to_owned().into())
  51       .set_name(self.title.to_owned())
  52       .set_published(convert_datetime(self.published));
  53
  54     if let Some(u) = self.updated.to_owned() {
  55       group.set_updated(convert_datetime(u));
  56     }
  57     if let Some(d) = self.description.to_owned() {
  58       set_content_and_source(&mut group, &d)?;
  59     }
  60
  61     if let Some(icon_url) = &self.icon {
  62       let mut image = Image::new();
  63       image.set_url::<Url>(icon_url.to_owned().into());
  64       group.set_icon(image.into_any_base()?);
  65     }
  66
  67     if let Some(banner_url) = &self.banner {
  68       let mut image = Image::new();
  69       image.set_url::<Url>(banner_url.to_owned().into());
  70       group.set_image(image.into_any_base()?);
  71     }
  72
  73     let mut ap_actor = ApActor::new(self.inbox_url.clone().into(), group);
  74     ap_actor
  75       .set_preferred_username(self.name.to_owned())
  76       .set_outbox(self.get_outbox_url()?)
  77       .set_followers(self.followers_url.clone().into())
  78       .set_endpoints(Endpoints {
  79         shared_inbox: Some(self.get_shared_inbox_or_inbox_url()),
  80         ..Default::default()
  81       });
  82
  83     Ok(Ext2::new(
  84       ap_actor,
  85       GroupExtension::new(self.nsfw, generate_moderators_url(&self.actor_id)?.into())?,
  86       self.get_public_key_ext()?,
  87     ))
  88   }
  89
  90   fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
  91     create_tombstone(
  92       self.deleted,
  93       self.actor_id.to_owned().into(),
  94       self.updated,
  95       GroupType::Group,
  96     )
  97   }
  98 }
  99
 100 #[async_trait::async_trait(?Send)]
 101 impl FromApub for Community {
 102   type ApubType = GroupExt;
 103
 104   /// Converts a `Group` to `Community`, inserts it into the database and updates moderators.
 105   async fn from_apub(
 106     group: &GroupExt,
 107     context: &LemmyContext,
 108     expected_domain: Option<Url>,
 109     request_counter: &mut i32,
 110   ) -> Result<Community, LemmyError> {
 111     let community: Community =
 112       get_object_from_apub(group, context, expected_domain, request_counter).await?;
 113
 114     let new_moderators = fetch_community_mods(context, group, request_counter).await?;
 115     let community_id = community.id;
 116     let current_moderators = blocking(context.pool(), move |conn| {
 117       CommunityModeratorView::for_community(&conn, community_id)
 118     })
 119     .await??;
 120     // Remove old mods from database which arent in the moderators collection anymore
 121     for mod_user in &current_moderators {
 122       if !new_moderators.contains(&&mod_user.moderator.actor_id.clone().into()) {
 123         let community_moderator_form = CommunityModeratorForm {
 124           community_id: mod_user.community.id,
 125           user_id: mod_user.moderator.id,
 126         };
 127         blocking(context.pool(), move |conn| {
 128           CommunityModerator::leave(conn, &community_moderator_form)
 129         })
 130         .await??;
 131       }
 132     }
 133
 134     // Add new mods to database which have been added to moderators collection
 135     for mod_uri in new_moderators {
 136       let mod_user = get_or_fetch_and_upsert_user(&mod_uri, context, request_counter).await?;
 137       let current_mod_uris: Vec<DbUrl> = current_moderators
 138         .clone()
 139         .iter()
 140         .map(|c| c.moderator.actor_id.clone())
 141         .collect();
 142       if !current_mod_uris.contains(&mod_user.actor_id) {
 143         let community_moderator_form = CommunityModeratorForm {
 144           community_id: community.id,
 145           user_id: mod_user.id,
 146         };
 147         blocking(context.pool(), move |conn| {
 148           CommunityModerator::join(conn, &community_moderator_form)
 149         })
 150         .await??;
 151       }
 152     }
 153
 154     Ok(community)
 155   }
 156 }
 157
 158 #[async_trait::async_trait(?Send)]
 159 impl FromApubToForm<GroupExt> for CommunityForm {
 160   async fn from_apub(
 161     group: &GroupExt,
 162     context: &LemmyContext,
 163     expected_domain: Option<Url>,
 164     request_counter: &mut i32,
 165   ) -> Result<Self, LemmyError> {
 166     let expected_domain = expected_domain.expect("expected_domain must be set for community");
 167     let moderator_uris = fetch_community_mods(context, group, request_counter).await?;
 168     let creator_uri = moderator_uris.first().context(location_info!())?;
 169
 170     let creator = get_or_fetch_and_upsert_user(creator_uri, context, request_counter).await?;
 171     let name = group
 172       .inner
 173       .preferred_username()
 174       .context(location_info!())?
 175       .to_string();
 176     let title = group
 177       .inner
 178       .name()
 179       .context(location_info!())?
 180       .as_one()
 181       .context(location_info!())?
 182       .as_xsd_string()
 183       .context(location_info!())?
 184       .to_string();
 185
 186     let description = get_source_markdown_value(group)?;
 187
 188     check_slurs(&name)?;
 189     check_slurs(&title)?;
 190     check_slurs_opt(&description)?;
 191
 192     let icon = match group.icon() {
 193       Some(any_image) => Some(
 194         Image::from_any_base(any_image.as_one().context(location_info!())?.clone())
 195           .context(location_info!())?
 196           .context(location_info!())?
 197           .url()
 198           .context(location_info!())?
 199           .as_single_xsd_any_uri()
 200           .map(|u| u.to_owned().into()),
 201       ),
 202       None => None,
 203     };
 204     let banner = match group.image() {
 205       Some(any_image) => Some(
 206         Image::from_any_base(any_image.as_one().context(location_info!())?.clone())
 207           .context(location_info!())?
 208           .context(location_info!())?
 209           .url()
 210           .context(location_info!())?
 211           .as_single_xsd_any_uri()
 212           .map(|u| u.to_owned().into()),
 213       ),
 214       None => None,
 215     };
 216     let shared_inbox = group
 217       .inner
 218       .endpoints()?
 219       .map(|e| e.shared_inbox)
 220       .flatten()
 221       .map(|s| s.to_owned().into());
 222
 223     Ok(CommunityForm {
 224       name,
 225       title,
 226       description,
 227       creator_id: creator.id,
 228       removed: None,
 229       published: group.inner.published().map(|u| u.to_owned().naive_local()),
 230       updated: group.inner.updated().map(|u| u.to_owned().naive_local()),
 231       deleted: None,
 232       nsfw: group.ext_one.sensitive.unwrap_or(false),
 233       actor_id: Some(check_object_domain(group, expected_domain)?),
 234       local: false,
 235       private_key: None,
 236       public_key: Some(group.ext_two.to_owned().public_key.public_key_pem),
 237       last_refreshed_at: Some(naive_now()),
 238       icon,
 239       banner,
 240       followers_url: Some(
 241         group
 242           .inner
 243           .followers()?
 244           .context(location_info!())?
 245           .to_owned()
 246           .into(),
 247       ),
 248       inbox_url: Some(group.inner.inbox()?.to_owned().into()),
 249       shared_inbox_url: Some(shared_inbox),
 250     })
 251   }
 252 }