lemmy/server/src/apub/post.rs

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use crate::{
apub::{
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activities::{populate_object_props, send_activity_to_community},
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create_apub_response,
create_apub_tombstone_response,
create_tombstone,
extensions::page_extension::PageExtension,
fetcher::{get_or_fetch_and_upsert_remote_community, get_or_fetch_and_upsert_remote_user},
get_apub_protocol_string,
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ActorType,
ApubLikeableType,
ApubObjectType,
FromApub,
PageExt,
ToApub,
},
blocking,
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convert_datetime,
db::{
community::Community,
post::{Post, PostForm},
user::User_,
Crud,
},
routes::DbPoolParam,
DbPool,
LemmyError,
Settings,
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};
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use activitystreams::{
activity::{Create, Delete, Dislike, Like, Remove, Undo, Update},
context,
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object::{kind::PageType, properties::ObjectProperties, AnyImage, Image, Page},
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BaseBox,
};
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use activitystreams_ext::Ext1;
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use activitystreams_new::object::Tombstone;
use actix_web::{body::Body, client::Client, web, HttpResponse};
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use serde::Deserialize;
#[derive(Deserialize)]
pub struct PostQuery {
post_id: String,
}
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/// Return the post json over HTTP.
pub async fn get_apub_post(
info: web::Path<PostQuery>,
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db: DbPoolParam,
) -> Result<HttpResponse<Body>, LemmyError> {
let id = info.post_id.parse::<i32>()?;
let post = blocking(&db, move |conn| Post::read(conn, id)).await??;
if !post.deleted {
Ok(create_apub_response(&post.to_apub(&db).await?))
} else {
Ok(create_apub_tombstone_response(&post.to_tombstone()?))
}
}
#[async_trait::async_trait(?Send)]
impl ToApub for Post {
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type Response = PageExt;
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// Turn a Lemmy post into an ActivityPub page that can be sent out over the network.
async fn to_apub(&self, pool: &DbPool) -> Result<PageExt, LemmyError> {
let mut page = Page::default();
let oprops: &mut ObjectProperties = page.as_mut();
let creator_id = self.creator_id;
let creator = blocking(pool, move |conn| User_::read(conn, creator_id)).await??;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
oprops
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// Not needed when the Post is embedded in a collection (like for community outbox)
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// TODO: need to set proper context defining sensitive/commentsEnabled fields
// https://git.asonix.dog/Aardwolf/activitystreams/issues/5
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.set_context_xsd_any_uri(context())?
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.set_id(self.ap_id.to_owned())?
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// Use summary field to be consistent with mastodon content warning.
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// https://mastodon.xyz/@Louisa/103987265222901387.json
.set_summary_xsd_string(self.name.to_owned())?
.set_published(convert_datetime(self.published))?
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.set_to_xsd_any_uri(community.actor_id)?
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.set_attributed_to_xsd_any_uri(creator.actor_id)?;
if let Some(body) = &self.body {
oprops.set_content_xsd_string(body.to_owned())?;
}
// TODO: hacky code because we get self.url == Some("")
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// https://github.com/LemmyNet/lemmy/issues/602
let url = self.url.as_ref().filter(|u| !u.is_empty());
if let Some(u) = url {
oprops.set_url_xsd_any_uri(u.to_owned())?;
// Embeds
let mut page_preview = Page::new();
page_preview
.object_props
.set_url_xsd_any_uri(u.to_owned())?;
if let Some(embed_title) = &self.embed_title {
page_preview
.object_props
.set_name_xsd_string(embed_title.to_owned())?;
}
if let Some(embed_description) = &self.embed_description {
page_preview
.object_props
.set_summary_xsd_string(embed_description.to_owned())?;
}
if let Some(embed_html) = &self.embed_html {
page_preview
.object_props
.set_content_xsd_string(embed_html.to_owned())?;
}
oprops.set_preview_base_box(page_preview)?;
}
if let Some(thumbnail_url) = &self.thumbnail_url {
let full_url = format!(
"{}://{}/pictshare/{}",
get_apub_protocol_string(),
Settings::get().hostname,
thumbnail_url
);
let mut image = Image::new();
image.object_props.set_url_xsd_any_uri(full_url)?;
let any_image = AnyImage::from_concrete(image)?;
oprops.set_image_any_image(any_image)?;
}
if let Some(u) = self.updated {
oprops.set_updated(convert_datetime(u))?;
}
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let ext = PageExtension {
comments_enabled: !self.locked,
sensitive: self.nsfw,
};
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Ok(Ext1::new(page, ext))
}
fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
create_tombstone(
self.deleted,
&self.ap_id,
self.updated,
PageType.to_string(),
)
}
}
#[async_trait::async_trait(?Send)]
impl FromApub for PostForm {
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type ApubType = PageExt;
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/// Parse an ActivityPub page received from another instance into a Lemmy post.
async fn from_apub(
page: &mut PageExt,
client: &Client,
pool: &DbPool,
) -> Result<PostForm, LemmyError> {
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let ext = &page.ext_one;
let oprops = &page.inner.object_props;
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let creator_actor_id = &oprops.get_attributed_to_xsd_any_uri().unwrap().to_string();
let creator = get_or_fetch_and_upsert_remote_user(&creator_actor_id, client, pool).await?;
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let community_actor_id = &oprops.get_to_xsd_any_uri().unwrap().to_string();
let community =
get_or_fetch_and_upsert_remote_community(&community_actor_id, client, pool).await?;
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let thumbnail_url = match oprops.get_image_any_image() {
Some(any_image) => any_image
.to_owned()
.into_concrete::<Image>()?
.object_props
.get_url_xsd_any_uri()
.map(|u| u.to_string()),
None => None,
};
let url = oprops.get_url_xsd_any_uri().map(|u| u.to_string());
let (embed_title, embed_description, embed_html) = match oprops.get_preview_base_box() {
Some(preview) => {
let preview_page = preview.to_owned().into_concrete::<Page>()?;
let name = preview_page
.object_props
.get_name_xsd_string()
.map(|n| n.to_string());
let summary = preview_page
.object_props
.get_summary_xsd_string()
.map(|s| s.to_string());
let content = preview_page
.object_props
.get_content_xsd_string()
.map(|c| c.to_string());
(name, summary, content)
}
None => (None, None, None),
};
Ok(PostForm {
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name: oprops.get_summary_xsd_string().unwrap().to_string(),
url,
body: oprops.get_content_xsd_string().map(|c| c.to_string()),
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creator_id: creator.id,
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community_id: community.id,
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removed: None,
locked: Some(!ext.comments_enabled),
published: oprops
.get_published()
.map(|u| u.as_ref().to_owned().naive_local()),
updated: oprops
.get_updated()
.map(|u| u.as_ref().to_owned().naive_local()),
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deleted: None,
nsfw: ext.sensitive,
stickied: None, // -> put it in "featured" collection of the community
embed_title,
embed_description,
embed_html,
thumbnail_url,
ap_id: oprops.get_id().unwrap().to_string(),
local: false,
})
}
}
#[async_trait::async_trait(?Send)]
impl ApubObjectType for Post {
/// Send out information about a newly created post, to the followers of the community.
async fn send_create(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/create/{}", self.ap_id, uuid::Uuid::new_v4());
let mut create = Create::new();
populate_object_props(
&mut create.object_props,
vec![community.get_followers_url()],
&id,
)?;
create
.create_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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send_activity_to_community(
creator,
&community,
vec![community.get_shared_inbox_url()],
create,
client,
pool,
)
.await?;
Ok(())
}
/// Send out information about an edited post, to the followers of the community.
async fn send_update(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/update/{}", self.ap_id, uuid::Uuid::new_v4());
let mut update = Update::new();
populate_object_props(
&mut update.object_props,
vec![community.get_followers_url()],
&id,
)?;
update
.update_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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send_activity_to_community(
creator,
&community,
vec![community.get_shared_inbox_url()],
update,
client,
pool,
)
.await?;
Ok(())
}
async fn send_delete(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/delete/{}", self.ap_id, uuid::Uuid::new_v4());
let mut delete = Delete::default();
populate_object_props(
&mut delete.object_props,
vec![community.get_followers_url()],
&id,
)?;
delete
.delete_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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send_activity_to_community(
creator,
&community,
vec![community.get_shared_inbox_url()],
delete,
client,
pool,
)
.await?;
Ok(())
}
async fn send_undo_delete(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/delete/{}", self.ap_id, uuid::Uuid::new_v4());
let mut delete = Delete::default();
populate_object_props(
&mut delete.object_props,
vec![community.get_followers_url()],
&id,
)?;
delete
.delete_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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// TODO
// Undo that fake activity
let undo_id = format!("{}/undo/delete/{}", self.ap_id, uuid::Uuid::new_v4());
let mut undo = Undo::default();
populate_object_props(
&mut undo.object_props,
vec![community.get_followers_url()],
&undo_id,
)?;
undo
.undo_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
.set_object_base_box(delete)?;
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send_activity_to_community(
creator,
&community,
vec![community.get_shared_inbox_url()],
undo,
client,
pool,
)
.await?;
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Ok(())
}
async fn send_remove(
&self,
mod_: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
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let id = format!("{}/remove/{}", self.ap_id, uuid::Uuid::new_v4());
let mut remove = Remove::default();
populate_object_props(
&mut remove.object_props,
vec![community.get_followers_url()],
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&id,
)?;
remove
.remove_props
.set_actor_xsd_any_uri(mod_.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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send_activity_to_community(
mod_,
&community,
vec![community.get_shared_inbox_url()],
remove,
client,
pool,
)
.await?;
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Ok(())
}
async fn send_undo_remove(
&self,
mod_: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
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let id = format!("{}/remove/{}", self.ap_id, uuid::Uuid::new_v4());
let mut remove = Remove::default();
populate_object_props(
&mut remove.object_props,
vec![community.get_followers_url()],
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&id,
)?;
remove
.remove_props
.set_actor_xsd_any_uri(mod_.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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// Undo that fake activity
let undo_id = format!("{}/undo/remove/{}", self.ap_id, uuid::Uuid::new_v4());
let mut undo = Undo::default();
populate_object_props(
&mut undo.object_props,
vec![community.get_followers_url()],
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&undo_id,
)?;
undo
.undo_props
.set_actor_xsd_any_uri(mod_.actor_id.to_owned())?
.set_object_base_box(remove)?;
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send_activity_to_community(
mod_,
&community,
vec![community.get_shared_inbox_url()],
undo,
client,
pool,
)
.await?;
Ok(())
}
}
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#[async_trait::async_trait(?Send)]
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impl ApubLikeableType for Post {
async fn send_like(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/like/{}", self.ap_id, uuid::Uuid::new_v4());
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let mut like = Like::new();
populate_object_props(
&mut like.object_props,
vec![community.get_followers_url()],
&id,
)?;
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like
.like_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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send_activity_to_community(
&creator,
&community,
vec![community.get_shared_inbox_url()],
like,
client,
pool,
)
.await?;
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Ok(())
}
async fn send_dislike(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/dislike/{}", self.ap_id, uuid::Uuid::new_v4());
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let mut dislike = Dislike::new();
populate_object_props(
&mut dislike.object_props,
vec![community.get_followers_url()],
&id,
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)?;
dislike
.dislike_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
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send_activity_to_community(
&creator,
&community,
vec![community.get_shared_inbox_url()],
dislike,
client,
pool,
)
.await?;
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Ok(())
}
async fn send_undo_like(
&self,
creator: &User_,
client: &Client,
pool: &DbPool,
) -> Result<(), LemmyError> {
let page = self.to_apub(pool).await?;
let community_id = self.community_id;
let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
let id = format!("{}/like/{}", self.ap_id, uuid::Uuid::new_v4());
let mut like = Like::new();
populate_object_props(
&mut like.object_props,
vec![community.get_followers_url()],
&id,
)?;
like
.like_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
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.set_object_base_box(BaseBox::from_concrete(page)?)?;
// TODO
// Undo that fake activity
let undo_id = format!("{}/undo/like/{}", self.ap_id, uuid::Uuid::new_v4());
let mut undo = Undo::default();
populate_object_props(
&mut undo.object_props,
vec![community.get_followers_url()],
&undo_id,
)?;
undo
.undo_props
.set_actor_xsd_any_uri(creator.actor_id.to_owned())?
.set_object_base_box(like)?;
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send_activity_to_community(
&creator,
&community,
vec![community.get_shared_inbox_url()],
undo,
client,
pool,
)
.await?;
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Ok(())
}
}