lemmy/crates/apub/src/objects/community.rs

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use crate::{
extensions::{context::lemmy_context, group_extensions::GroupExtension},
fetcher::user::get_or_fetch_and_upsert_user,
objects::{
check_object_domain,
create_tombstone,
get_object_from_apub,
get_source_markdown_value,
set_content_and_source,
FromApub,
FromApubToForm,
ToApub,
},
ActorType,
GroupExt,
};
use activitystreams::{
actor::{kind::GroupType, ApActor, Endpoints, Group},
base::BaseExt,
object::{ApObject, Image, Tombstone},
prelude::*,
};
use activitystreams_ext::Ext2;
use anyhow::Context;
use lemmy_api_structs::blocking;
use lemmy_db_queries::{DbPool, Joinable};
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use lemmy_db_schema::{
naive_now,
source::community::{Community, CommunityForm, CommunityModerator, CommunityModeratorForm},
DbUrl,
};
use lemmy_db_views_actor::community_moderator_view::CommunityModeratorView;
use lemmy_utils::{
location_info,
utils::{check_slurs, check_slurs_opt, convert_datetime},
LemmyError,
};
use lemmy_websocket::LemmyContext;
use url::Url;
#[async_trait::async_trait(?Send)]
impl ToApub for Community {
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type ApubType = GroupExt;
async fn to_apub(&self, pool: &DbPool) -> Result<GroupExt, LemmyError> {
// The attributed to, is an ordered vector with the creator actor_ids first,
// then the rest of the moderators
// TODO Technically the instance admins can mod the community, but lets
// ignore that for now
let id = self.id;
let moderators = blocking(pool, move |conn| {
CommunityModeratorView::for_community(&conn, id)
})
.await??;
let mut group = ApObject::new(Group::new());
group
.set_many_contexts(lemmy_context()?)
.set_id(self.actor_id.to_owned().into())
.set_name(self.title.to_owned())
.set_published(convert_datetime(self.published));
if let Some(u) = self.updated.to_owned() {
group.set_updated(convert_datetime(u));
}
if let Some(d) = self.description.to_owned() {
set_content_and_source(&mut group, &d)?;
}
if let Some(icon_url) = &self.icon {
let mut image = Image::new();
image.set_url::<Url>(icon_url.to_owned().into());
group.set_icon(image.into_any_base()?);
}
if let Some(banner_url) = &self.banner {
let mut image = Image::new();
image.set_url::<Url>(banner_url.to_owned().into());
group.set_image(image.into_any_base()?);
}
let mut ap_actor = ApActor::new(self.inbox_url.clone().into(), group);
ap_actor
.set_preferred_username(self.name.to_owned())
.set_outbox(self.get_outbox_url()?)
.set_followers(self.followers_url.clone().into())
.set_endpoints(Endpoints {
shared_inbox: Some(self.get_shared_inbox_or_inbox_url()),
..Default::default()
});
let moderators: Vec<Url> = moderators
.into_iter()
.map(|m| m.moderator.actor_id.into_inner())
.collect();
Ok(Ext2::new(
ap_actor,
GroupExtension::new(self.nsfw, moderators)?,
self.get_public_key_ext()?,
))
}
fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
create_tombstone(
self.deleted,
self.actor_id.to_owned().into(),
self.updated,
GroupType::Group,
)
}
}
#[async_trait::async_trait(?Send)]
impl FromApub for Community {
type ApubType = GroupExt;
/// Converts a `Group` to `Community`, inserts it into the database and updates moderators.
async fn from_apub(
group: &GroupExt,
context: &LemmyContext,
expected_domain: Url,
request_counter: &mut i32,
) -> Result<Community, LemmyError> {
let community: Community =
get_object_from_apub(group, context, expected_domain, request_counter).await?;
let new_moderators = get_community_moderators(group)?;
let community_id = community.id;
let current_moderators = blocking(context.pool(), move |conn| {
CommunityModeratorView::for_community(&conn, community_id)
})
.await??;
// Remove old mods from database which arent in the moderators collection anymore
for mod_user in &current_moderators {
if !new_moderators.contains(&&mod_user.moderator.actor_id.clone().into()) {
let community_moderator_form = CommunityModeratorForm {
community_id: mod_user.community.id,
user_id: mod_user.moderator.id,
};
blocking(context.pool(), move |conn| {
CommunityModerator::leave(conn, &community_moderator_form)
})
.await??;
}
}
// Add new mods to database which have been added to moderators collection
for mod_uri in new_moderators {
let mod_user = get_or_fetch_and_upsert_user(&mod_uri, context, request_counter).await?;
let current_mod_uris: Vec<DbUrl> = current_moderators
.clone()
.iter()
.map(|c| c.moderator.actor_id.clone())
.collect();
if !current_mod_uris.contains(&mod_user.actor_id) {
let community_moderator_form = CommunityModeratorForm {
community_id: community.id,
user_id: mod_user.id,
};
blocking(context.pool(), move |conn| {
CommunityModerator::join(conn, &community_moderator_form)
})
.await??;
}
}
Ok(community)
}
}
#[async_trait::async_trait(?Send)]
impl FromApubToForm<GroupExt> for CommunityForm {
async fn from_apub(
group: &GroupExt,
context: &LemmyContext,
expected_domain: Url,
request_counter: &mut i32,
) -> Result<Self, LemmyError> {
let moderator_uris = get_community_moderators(group)?;
let creator_uri = moderator_uris.first().context(location_info!())?;
let creator = get_or_fetch_and_upsert_user(creator_uri, context, request_counter).await?;
let name = group
.inner
.preferred_username()
.context(location_info!())?
.to_string();
let title = group
.inner
.name()
.context(location_info!())?
.as_one()
.context(location_info!())?
.as_xsd_string()
.context(location_info!())?
.to_string();
let description = get_source_markdown_value(group)?;
check_slurs(&name)?;
check_slurs(&title)?;
check_slurs_opt(&description)?;
let icon = match group.icon() {
Some(any_image) => Some(
Image::from_any_base(any_image.as_one().context(location_info!())?.clone())
.context(location_info!())?
.context(location_info!())?
.url()
.context(location_info!())?
.as_single_xsd_any_uri()
.map(|u| u.to_owned().into()),
),
None => None,
};
let banner = match group.image() {
Some(any_image) => Some(
Image::from_any_base(any_image.as_one().context(location_info!())?.clone())
.context(location_info!())?
.context(location_info!())?
.url()
.context(location_info!())?
.as_single_xsd_any_uri()
.map(|u| u.to_owned().into()),
),
None => None,
};
let shared_inbox = group
.inner
.endpoints()?
.map(|e| e.shared_inbox)
.flatten()
.map(|s| s.to_owned().into());
Ok(CommunityForm {
name,
title,
description,
creator_id: creator.id,
removed: None,
published: group.inner.published().map(|u| u.to_owned().naive_local()),
updated: group.inner.updated().map(|u| u.to_owned().naive_local()),
deleted: None,
nsfw: group.ext_one.sensitive.unwrap_or(false),
actor_id: Some(check_object_domain(group, expected_domain)?),
local: false,
private_key: None,
public_key: Some(group.ext_two.to_owned().public_key.public_key_pem),
last_refreshed_at: Some(naive_now()),
icon,
banner,
followers_url: Some(
group
.inner
.followers()?
.context(location_info!())?
.to_owned()
.into(),
),
inbox_url: Some(group.inner.inbox()?.to_owned().into()),
shared_inbox_url: Some(shared_inbox),
})
}
}
fn get_community_moderators(group: &GroupExt) -> Result<Vec<&Url>, LemmyError> {
if let Some(moderators) = &group.ext_one.moderators {
Ok(
moderators
.items()
.map(|i| i.as_many())
.flatten()
.context(location_info!())?
.iter()
.filter_map(|i| i.as_xsd_any_uri())
.collect(),
)
} else {
Ok(vec![])
}
}