mirror of
https://github.com/LemmyNet/lemmy.git
synced 2024-09-25 04:50:02 +00:00
264 lines
7.6 KiB
Rust
264 lines
7.6 KiB
Rust
use crate::{
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activities::verify_community_matches,
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fetcher::user_or_community::{PersonOrGroupType, UserOrCommunity},
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local_instance,
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objects::{community::ApubCommunity, person::ApubPerson, post::ApubPost},
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protocol::{objects::LanguageTag, ImageObject, InCommunity, Source},
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};
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use activitypub_federation::{
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core::object_id::ObjectId,
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data::Data,
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deser::{
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helpers::{deserialize_one_or_many, deserialize_skip_error},
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values::MediaTypeMarkdownOrHtml,
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},
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traits::{ActivityHandler, ApubObject},
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};
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use activitystreams_kinds::{
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link::LinkType,
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object::{DocumentType, ImageType},
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};
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use chrono::{DateTime, FixedOffset};
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use itertools::Itertools;
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use lemmy_db_schema::newtypes::DbUrl;
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use lemmy_utils::error::LemmyError;
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use lemmy_websocket::LemmyContext;
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use serde::{Deserialize, Serialize};
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use serde_with::skip_serializing_none;
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use url::Url;
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#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
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pub enum PageType {
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Page,
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Article,
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Note,
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Video,
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Event,
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}
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#[skip_serializing_none]
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub struct Page {
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#[serde(rename = "type")]
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pub(crate) kind: PageType,
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pub(crate) id: ObjectId<ApubPost>,
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pub(crate) attributed_to: AttributedTo,
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#[serde(deserialize_with = "deserialize_one_or_many")]
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pub(crate) to: Vec<Url>,
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pub(crate) name: String,
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#[serde(deserialize_with = "deserialize_one_or_many", default)]
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pub(crate) cc: Vec<Url>,
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pub(crate) content: Option<String>,
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pub(crate) media_type: Option<MediaTypeMarkdownOrHtml>,
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#[serde(deserialize_with = "deserialize_skip_error", default)]
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pub(crate) source: Option<Source>,
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/// deprecated, use attachment field
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#[serde(deserialize_with = "deserialize_skip_error", default)]
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pub(crate) url: Option<Url>,
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/// most software uses array type for attachment field, so we do the same. nevertheless, we only
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/// use the first item
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#[serde(default)]
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pub(crate) attachment: Vec<Attachment>,
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pub(crate) image: Option<ImageObject>,
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pub(crate) comments_enabled: Option<bool>,
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pub(crate) sensitive: Option<bool>,
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pub(crate) stickied: Option<bool>,
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pub(crate) published: Option<DateTime<FixedOffset>>,
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pub(crate) updated: Option<DateTime<FixedOffset>>,
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pub(crate) language: Option<LanguageTag>,
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pub(crate) audience: Option<ObjectId<ApubCommunity>>,
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub(crate) struct Link {
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pub(crate) href: Url,
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pub(crate) r#type: LinkType,
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub(crate) struct Image {
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#[serde(rename = "type")]
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pub(crate) kind: ImageType,
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pub(crate) url: Url,
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub(crate) struct Document {
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#[serde(rename = "type")]
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pub(crate) kind: DocumentType,
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pub(crate) url: Url,
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(untagged)]
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pub(crate) enum Attachment {
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Link(Link),
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Image(Image),
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Document(Document),
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}
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impl Attachment {
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pub(crate) fn url(self) -> Url {
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match self {
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// url as sent by Lemmy (new)
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Attachment::Link(l) => l.href,
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// image sent by lotide
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Attachment::Image(i) => i.url,
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// sent by mobilizon
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Attachment::Document(d) => d.url,
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}
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}
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(untagged)]
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pub(crate) enum AttributedTo {
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Lemmy(ObjectId<ApubPerson>),
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Peertube([AttributedToPeertube; 2]),
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}
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#[derive(Clone, Debug, Deserialize, Serialize)]
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#[serde(rename_all = "camelCase")]
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pub(crate) struct AttributedToPeertube {
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#[serde(rename = "type")]
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pub kind: PersonOrGroupType,
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pub id: ObjectId<UserOrCommunity>,
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}
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impl Page {
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/// Only mods can change the post's stickied/locked status. So if either of these is changed from
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/// the current value, it is a mod action and needs to be verified as such.
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///
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/// Both stickied and locked need to be false on a newly created post (verified in [[CreatePost]].
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pub(crate) async fn is_mod_action(&self, context: &LemmyContext) -> Result<bool, LemmyError> {
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let old_post = ObjectId::<ApubPost>::new(self.id.clone())
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.dereference_local(context)
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.await;
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let stickied_changed = Page::is_stickied_changed(&old_post, &self.stickied);
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let locked_changed = Page::is_locked_changed(&old_post, &self.comments_enabled);
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Ok(stickied_changed || locked_changed)
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}
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pub(crate) fn is_stickied_changed<E>(
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old_post: &Result<ApubPost, E>,
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new_stickied: &Option<bool>,
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) -> bool {
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if let Some(new_stickied) = new_stickied {
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if let Ok(old_post) = old_post {
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return new_stickied != &old_post.stickied;
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}
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}
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false
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}
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pub(crate) fn is_locked_changed<E>(
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old_post: &Result<ApubPost, E>,
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new_comments_enabled: &Option<bool>,
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) -> bool {
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if let Some(new_comments_enabled) = new_comments_enabled {
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if let Ok(old_post) = old_post {
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return new_comments_enabled != &!old_post.locked;
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}
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}
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false
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}
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pub(crate) fn creator(&self) -> Result<ObjectId<ApubPerson>, LemmyError> {
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match &self.attributed_to {
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AttributedTo::Lemmy(l) => Ok(l.clone()),
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AttributedTo::Peertube(p) => p
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.iter()
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.find(|a| a.kind == PersonOrGroupType::Person)
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.map(|a| ObjectId::<ApubPerson>::new(a.id.clone().into_inner()))
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.ok_or_else(|| LemmyError::from_message("page does not specify creator person")),
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}
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}
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}
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impl Attachment {
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pub(crate) fn new(url: DbUrl) -> Attachment {
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Attachment::Link(Link {
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href: url.into(),
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r#type: Default::default(),
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})
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}
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}
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// Used for community outbox, so that it can be compatible with Pleroma/Mastodon.
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#[async_trait::async_trait(?Send)]
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impl ActivityHandler for Page {
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type DataType = LemmyContext;
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type Error = LemmyError;
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fn id(&self) -> &Url {
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unimplemented!()
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}
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fn actor(&self) -> &Url {
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unimplemented!()
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}
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async fn verify(
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&self,
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data: &Data<Self::DataType>,
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request_counter: &mut i32,
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) -> Result<(), LemmyError> {
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ApubPost::verify(self, self.id.inner(), data, request_counter).await
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}
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async fn receive(
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self,
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data: &Data<Self::DataType>,
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request_counter: &mut i32,
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) -> Result<(), LemmyError> {
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ApubPost::from_apub(self, data, request_counter).await?;
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Ok(())
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}
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}
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#[async_trait::async_trait(?Send)]
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impl InCommunity for Page {
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async fn community(
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&self,
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context: &LemmyContext,
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request_counter: &mut i32,
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) -> Result<ApubCommunity, LemmyError> {
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let instance = local_instance(context).await;
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let community = match &self.attributed_to {
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AttributedTo::Lemmy(_) => {
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let mut iter = self.to.iter().merge(self.cc.iter());
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loop {
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if let Some(cid) = iter.next() {
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let cid = ObjectId::new(cid.clone());
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if let Ok(c) = cid.dereference(context, instance, request_counter).await {
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break c;
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}
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} else {
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return Err(LemmyError::from_message("No community found in cc"));
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}
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}
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}
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AttributedTo::Peertube(p) => {
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p.iter()
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.find(|a| a.kind == PersonOrGroupType::Group)
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.map(|a| ObjectId::<ApubCommunity>::new(a.id.clone().into_inner()))
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.ok_or_else(|| LemmyError::from_message("page does not specify group"))?
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.dereference(context, instance, request_counter)
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.await?
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}
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};
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if let Some(audience) = &self.audience {
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let audience = audience
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.dereference(context, instance, request_counter)
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.await?;
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verify_community_matches(&audience, community.id)?;
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Ok(audience)
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} else {
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Ok(community)
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}
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}
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}
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