mirror of
https://github.com/LemmyNet/lemmy.git
synced 2024-06-01 00:28:05 +00:00
579 lines
16 KiB
Rust
579 lines
16 KiB
Rust
use crate::{
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api::check_slurs,
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apub::{
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activities::{generate_activity_id, send_activity_to_community},
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check_actor_domain,
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create_apub_response,
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create_apub_tombstone_response,
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create_tombstone,
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extensions::page_extension::PageExtension,
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fetcher::{get_or_fetch_and_upsert_community, get_or_fetch_and_upsert_user},
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ActorType,
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ApubLikeableType,
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ApubObjectType,
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FromApub,
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PageExt,
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ToApub,
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},
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blocking,
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DbPool,
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LemmyContext,
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};
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use activitystreams::{
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activity::{
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kind::{CreateType, DeleteType, DislikeType, LikeType, RemoveType, UndoType, UpdateType},
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Create,
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Delete,
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Dislike,
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Like,
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Remove,
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Undo,
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Update,
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},
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object::{kind::PageType, Image, Object, Page, Tombstone},
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prelude::*,
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public,
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};
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use activitystreams_ext::Ext1;
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use actix_web::{body::Body, web, HttpResponse};
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use anyhow::Context;
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use lemmy_db::{
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community::Community,
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post::{Post, PostForm},
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user::User_,
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Crud,
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};
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use lemmy_utils::{convert_datetime, location_info, remove_slurs, LemmyError};
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use serde::Deserialize;
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use url::Url;
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#[derive(Deserialize)]
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pub struct PostQuery {
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post_id: String,
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}
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/// Return the post json over HTTP.
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pub async fn get_apub_post(
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info: web::Path<PostQuery>,
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context: web::Data<LemmyContext>,
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) -> Result<HttpResponse<Body>, LemmyError> {
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let id = info.post_id.parse::<i32>()?;
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let post = blocking(context.pool(), move |conn| Post::read(conn, id)).await??;
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if !post.deleted {
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Ok(create_apub_response(&post.to_apub(context.pool()).await?))
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} else {
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Ok(create_apub_tombstone_response(&post.to_tombstone()?))
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}
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}
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#[async_trait::async_trait(?Send)]
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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.
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async fn to_apub(&self, pool: &DbPool) -> Result<PageExt, LemmyError> {
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let mut page = Page::new();
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let creator_id = self.creator_id;
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let creator = blocking(pool, move |conn| User_::read(conn, creator_id)).await??;
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let community_id = self.community_id;
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let community = blocking(pool, move |conn| Community::read(conn, community_id)).await??;
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page
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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
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// https://git.asonix.dog/Aardwolf/activitystreams/issues/5
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.set_context(activitystreams::context())
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.set_id(self.ap_id.parse::<Url>()?)
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// Use summary field to be consistent with mastodon content warning.
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// https://mastodon.xyz/@Louisa/103987265222901387.json
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.set_summary(self.name.to_owned())
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.set_published(convert_datetime(self.published))
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.set_to(community.actor_id)
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.set_attributed_to(creator.actor_id);
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if let Some(body) = &self.body {
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page.set_content(body.to_owned());
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}
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// TODO: hacky code because we get self.url == Some("")
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// https://github.com/LemmyNet/lemmy/issues/602
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let url = self.url.as_ref().filter(|u| !u.is_empty());
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if let Some(u) = url {
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page.set_url(u.to_owned());
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// Embeds
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let mut page_preview = Page::new();
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page_preview.set_url(u.to_owned());
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if let Some(embed_title) = &self.embed_title {
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page_preview.set_name(embed_title.to_owned());
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}
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if let Some(embed_description) = &self.embed_description {
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page_preview.set_summary(embed_description.to_owned());
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}
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if let Some(embed_html) = &self.embed_html {
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page_preview.set_content(embed_html.to_owned());
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}
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page.set_preview(page_preview.into_any_base()?);
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}
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if let Some(thumbnail_url) = &self.thumbnail_url {
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let mut image = Image::new();
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image.set_url(thumbnail_url.to_string());
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page.set_image(image.into_any_base()?);
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}
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if let Some(u) = self.updated {
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page.set_updated(convert_datetime(u));
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}
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let ext = PageExtension {
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comments_enabled: !self.locked,
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sensitive: self.nsfw,
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stickied: self.stickied,
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};
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Ok(Ext1::new(page, ext))
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}
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fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
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create_tombstone(self.deleted, &self.ap_id, self.updated, PageType::Page)
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}
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}
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struct EmbedType {
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title: Option<String>,
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description: Option<String>,
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html: Option<String>,
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}
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fn extract_embed_from_apub(
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page: &Ext1<Object<PageType>, PageExtension>,
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) -> Result<EmbedType, LemmyError> {
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match page.inner.preview() {
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Some(preview) => {
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let preview_page = Page::from_any_base(preview.one().context(location_info!())?.to_owned())?
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.context(location_info!())?;
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let title = preview_page
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.name()
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.map(|n| n.one())
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.flatten()
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.map(|s| s.as_xsd_string())
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.flatten()
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.map(|s| s.to_string());
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let description = preview_page
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.summary()
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.map(|s| s.as_single_xsd_string())
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.flatten()
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.map(|s| s.to_string());
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let html = preview_page
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.content()
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.map(|c| c.as_single_xsd_string())
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.flatten()
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.map(|s| s.to_string());
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Ok(EmbedType {
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title,
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description,
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html,
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})
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}
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None => Ok(EmbedType {
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title: None,
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description: None,
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html: None,
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}),
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}
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}
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#[async_trait::async_trait(?Send)]
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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.
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async fn from_apub(
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page: &PageExt,
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context: &LemmyContext,
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expected_domain: Option<Url>,
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) -> Result<PostForm, LemmyError> {
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let ext = &page.ext_one;
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let creator_actor_id = page
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.inner
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.attributed_to()
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.as_ref()
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.context(location_info!())?
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.as_single_xsd_any_uri()
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.context(location_info!())?;
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let creator = get_or_fetch_and_upsert_user(creator_actor_id, context).await?;
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let community_actor_id = page
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.inner
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.to()
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.as_ref()
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.context(location_info!())?
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.as_single_xsd_any_uri()
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.context(location_info!())?;
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let community = get_or_fetch_and_upsert_community(community_actor_id, context).await?;
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let thumbnail_url = match &page.inner.image() {
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Some(any_image) => Image::from_any_base(
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any_image
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.to_owned()
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.as_one()
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.context(location_info!())?
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.to_owned(),
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)?
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.context(location_info!())?
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.url()
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.context(location_info!())?
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.as_single_xsd_any_uri()
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.map(|u| u.to_string()),
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None => None,
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};
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let embed = extract_embed_from_apub(page)?;
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let name = page
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.inner
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.summary()
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.as_ref()
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.context(location_info!())?
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.as_single_xsd_string()
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.context(location_info!())?
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.to_string();
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let url = page
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.inner
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.url()
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.as_ref()
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.map(|u| u.as_single_xsd_string())
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.flatten()
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.map(|s| s.to_string());
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let body = page
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.inner
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.content()
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.as_ref()
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.map(|c| c.as_single_xsd_string())
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.flatten()
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.map(|s| s.to_string());
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check_slurs(&name)?;
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let body_slurs_removed = body.map(|b| remove_slurs(&b));
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Ok(PostForm {
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name,
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url,
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body: body_slurs_removed,
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creator_id: creator.id,
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community_id: community.id,
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removed: None,
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locked: Some(!ext.comments_enabled),
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published: page
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.inner
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.published()
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.as_ref()
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.map(|u| u.to_owned().naive_local()),
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updated: page
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.inner
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.updated()
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.as_ref()
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.map(|u| u.to_owned().naive_local()),
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deleted: None,
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nsfw: ext.sensitive,
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stickied: Some(ext.stickied),
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embed_title: embed.title,
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embed_description: embed.description,
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embed_html: embed.html,
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thumbnail_url,
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ap_id: Some(check_actor_domain(page, expected_domain)?),
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local: false,
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})
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}
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}
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#[async_trait::async_trait(?Send)]
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impl ApubObjectType for Post {
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/// Send out information about a newly created post, to the followers of the community.
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async fn send_create(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let page = self.to_apub(context.pool()).await?;
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let community_id = self.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut create = Create::new(creator.actor_id.to_owned(), page.into_any_base()?);
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create
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(CreateType::Create)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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create,
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context,
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)
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.await?;
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Ok(())
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}
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/// Send out information about an edited post, to the followers of the community.
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async fn send_update(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let page = self.to_apub(context.pool()).await?;
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let community_id = self.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
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let mut update = Update::new(creator.actor_id.to_owned(), page.into_any_base()?);
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update
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(UpdateType::Update)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
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send_activity_to_community(
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creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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update,
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context,
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)
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.await?;
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Ok(())
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}
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async fn send_delete(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
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let page = self.to_apub(context.pool()).await?;
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let community_id = self.community_id;
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
|
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let mut delete = Delete::new(creator.actor_id.to_owned(), page.into_any_base()?);
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delete
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.set_context(activitystreams::context())
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.set_id(generate_activity_id(DeleteType::Delete)?)
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.set_to(public())
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.set_many_ccs(vec![community.get_followers_url()?]);
|
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send_activity_to_community(
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creator,
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&community,
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vec![community.get_shared_inbox_url()?],
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delete,
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context,
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)
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.await?;
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Ok(())
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}
|
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async fn send_undo_delete(
|
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&self,
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creator: &User_,
|
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context: &LemmyContext,
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) -> Result<(), LemmyError> {
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let page = self.to_apub(context.pool()).await?;
|
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|
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let community_id = self.community_id;
|
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let community = blocking(context.pool(), move |conn| {
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Community::read(conn, community_id)
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})
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.await??;
|
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|
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let mut delete = Delete::new(creator.actor_id.to_owned(), page.into_any_base()?);
|
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delete
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.set_context(activitystreams::context())
|
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.set_id(generate_activity_id(DeleteType::Delete)?)
|
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.set_to(public())
|
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.set_many_ccs(vec![community.get_followers_url()?]);
|
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|
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// Undo that fake activity
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let mut undo = Undo::new(creator.actor_id.to_owned(), delete.into_any_base()?);
|
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undo
|
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.set_context(activitystreams::context())
|
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.set_id(generate_activity_id(UndoType::Undo)?)
|
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.set_to(public())
|
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.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
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send_activity_to_community(
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creator,
|
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&community,
|
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vec![community.get_shared_inbox_url()?],
|
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undo,
|
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context,
|
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)
|
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.await?;
|
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Ok(())
|
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}
|
|
|
|
async fn send_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
|
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let page = self.to_apub(context.pool()).await?;
|
|
|
|
let community_id = self.community_id;
|
|
let community = blocking(context.pool(), move |conn| {
|
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Community::read(conn, community_id)
|
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})
|
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.await??;
|
|
|
|
let mut remove = Remove::new(mod_.actor_id.to_owned(), page.into_any_base()?);
|
|
remove
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(RemoveType::Remove)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
send_activity_to_community(
|
|
mod_,
|
|
&community,
|
|
vec![community.get_shared_inbox_url()?],
|
|
remove,
|
|
context,
|
|
)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
|
|
async fn send_undo_remove(&self, mod_: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
|
|
let page = self.to_apub(context.pool()).await?;
|
|
|
|
let community_id = self.community_id;
|
|
let community = blocking(context.pool(), move |conn| {
|
|
Community::read(conn, community_id)
|
|
})
|
|
.await??;
|
|
|
|
let mut remove = Remove::new(mod_.actor_id.to_owned(), page.into_any_base()?);
|
|
remove
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(RemoveType::Remove)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
// Undo that fake activity
|
|
let mut undo = Undo::new(mod_.actor_id.to_owned(), remove.into_any_base()?);
|
|
undo
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(UndoType::Undo)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
send_activity_to_community(
|
|
mod_,
|
|
&community,
|
|
vec![community.get_shared_inbox_url()?],
|
|
undo,
|
|
context,
|
|
)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
}
|
|
|
|
#[async_trait::async_trait(?Send)]
|
|
impl ApubLikeableType for Post {
|
|
async fn send_like(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
|
|
let page = self.to_apub(context.pool()).await?;
|
|
|
|
let community_id = self.community_id;
|
|
let community = blocking(context.pool(), move |conn| {
|
|
Community::read(conn, community_id)
|
|
})
|
|
.await??;
|
|
|
|
let mut like = Like::new(creator.actor_id.to_owned(), page.into_any_base()?);
|
|
like
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(LikeType::Like)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
send_activity_to_community(
|
|
&creator,
|
|
&community,
|
|
vec![community.get_shared_inbox_url()?],
|
|
like,
|
|
context,
|
|
)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
|
|
async fn send_dislike(&self, creator: &User_, context: &LemmyContext) -> Result<(), LemmyError> {
|
|
let page = self.to_apub(context.pool()).await?;
|
|
|
|
let community_id = self.community_id;
|
|
let community = blocking(context.pool(), move |conn| {
|
|
Community::read(conn, community_id)
|
|
})
|
|
.await??;
|
|
|
|
let mut dislike = Dislike::new(creator.actor_id.to_owned(), page.into_any_base()?);
|
|
dislike
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(DislikeType::Dislike)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
send_activity_to_community(
|
|
&creator,
|
|
&community,
|
|
vec![community.get_shared_inbox_url()?],
|
|
dislike,
|
|
context,
|
|
)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
|
|
async fn send_undo_like(
|
|
&self,
|
|
creator: &User_,
|
|
context: &LemmyContext,
|
|
) -> Result<(), LemmyError> {
|
|
let page = self.to_apub(context.pool()).await?;
|
|
|
|
let community_id = self.community_id;
|
|
let community = blocking(context.pool(), move |conn| {
|
|
Community::read(conn, community_id)
|
|
})
|
|
.await??;
|
|
|
|
let mut like = Like::new(creator.actor_id.to_owned(), page.into_any_base()?);
|
|
like
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(LikeType::Like)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
// Undo that fake activity
|
|
let mut undo = Undo::new(creator.actor_id.to_owned(), like.into_any_base()?);
|
|
undo
|
|
.set_context(activitystreams::context())
|
|
.set_id(generate_activity_id(UndoType::Undo)?)
|
|
.set_to(public())
|
|
.set_many_ccs(vec![community.get_followers_url()?]);
|
|
|
|
send_activity_to_community(
|
|
&creator,
|
|
&community,
|
|
vec![community.get_shared_inbox_url()?],
|
|
undo,
|
|
context,
|
|
)
|
|
.await?;
|
|
Ok(())
|
|
}
|
|
}
|