2020-10-12 14:10:09 +00:00
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use crate::{
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2021-07-31 14:57:37 +00:00
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activities::{extract_community, verify_person_in_community},
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2021-07-27 22:18:50 +00:00
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extensions::context::lemmy_context,
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2021-03-10 22:33:55 +00:00
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fetcher::person::get_or_fetch_and_upsert_person,
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2021-08-12 12:48:09 +00:00
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objects::{create_tombstone, FromApub, ImageObject, Source, ToApub},
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2021-07-31 14:57:37 +00:00
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ActorType,
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2020-10-12 14:10:09 +00:00
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};
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use activitystreams::{
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base::AnyBase,
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object::{
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kind::{ImageType, PageType},
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Tombstone,
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},
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primitives::OneOrMany,
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2021-02-10 13:01:02 +00:00
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public,
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unparsed::Unparsed,
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};
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use chrono::{DateTime, FixedOffset};
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2021-03-25 19:19:40 +00:00
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use lemmy_api_common::blocking;
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2021-07-30 14:35:32 +00:00
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use lemmy_apub_lib::{
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values::{MediaTypeHtml, MediaTypeMarkdown},
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verify_domains_match,
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};
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use lemmy_db_queries::{ApubObject, Crud, DbPool};
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use lemmy_db_schema::{
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self,
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source::{
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community::Community,
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person::Person,
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post::{Post, PostForm},
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},
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2020-10-12 14:10:09 +00:00
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};
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use lemmy_utils::{
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request::fetch_post_links_and_pictrs_data,
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utils::{check_slurs, convert_datetime, markdown_to_html, remove_slurs},
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2020-10-12 14:10:09 +00:00
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LemmyError,
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};
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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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2020-10-12 14:10:09 +00:00
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use url::Url;
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2021-08-12 12:48:09 +00:00
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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 = "@context")]
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context: OneOrMany<AnyBase>,
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r#type: PageType,
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id: Url,
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pub(crate) attributed_to: Url,
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to: [Url; 2],
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name: String,
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content: Option<String>,
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media_type: MediaTypeHtml,
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source: Option<Source>,
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url: Option<Url>,
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image: Option<ImageObject>,
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pub(crate) comments_enabled: Option<bool>,
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sensitive: Option<bool>,
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pub(crate) stickied: Option<bool>,
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published: DateTime<FixedOffset>,
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updated: Option<DateTime<FixedOffset>>,
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#[serde(flatten)]
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unparsed: Unparsed,
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}
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impl Page {
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pub(crate) fn id_unchecked(&self) -> &Url {
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&self.id
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}
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pub(crate) fn id(&self, expected_domain: &Url) -> Result<&Url, LemmyError> {
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verify_domains_match(&self.id, expected_domain)?;
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Ok(&self.id)
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}
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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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2020-10-19 14:29:35 +00:00
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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, pool: &DbPool) -> Result<bool, LemmyError> {
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let post_id = self.id.clone();
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let old_post = blocking(pool, move |conn| {
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Post::read_from_apub_id(conn, &post_id.into())
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})
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.await?;
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let is_mod_action = if let Ok(old_post) = old_post {
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self.stickied != Some(old_post.stickied) || self.comments_enabled != Some(!old_post.locked)
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} else {
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false
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};
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Ok(is_mod_action)
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}
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pub(crate) async fn verify(
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&self,
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context: &LemmyContext,
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request_counter: &mut i32,
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) -> Result<(), LemmyError> {
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let community = extract_community(&self.to, context, request_counter).await?;
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check_slurs(&self.name)?;
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verify_domains_match(&self.attributed_to, &self.id)?;
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verify_person_in_community(
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&self.attributed_to,
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&community.actor_id(),
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context,
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request_counter,
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)
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.await?;
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Ok(())
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2020-12-08 17:38:48 +00:00
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}
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}
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2021-07-29 08:58:29 +00:00
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#[async_trait::async_trait(?Send)]
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impl ToApub for Post {
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type ApubType = Page;
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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<Page, LemmyError> {
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let creator_id = self.creator_id;
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let creator = blocking(pool, move |conn| Person::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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let source = self.body.clone().map(|body| Source {
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content: body,
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media_type: MediaTypeMarkdown::Markdown,
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});
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let image = self.thumbnail_url.clone().map(|thumb| ImageObject {
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kind: ImageType::Image,
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url: thumb.into(),
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});
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let page = Page {
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context: lemmy_context(),
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r#type: PageType::Page,
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id: self.ap_id.clone().into(),
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attributed_to: creator.actor_id.into(),
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to: [community.actor_id.into(), public()],
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name: self.name.clone(),
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content: self.body.as_ref().map(|b| markdown_to_html(b)),
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media_type: MediaTypeHtml::Html,
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source,
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url: self.url.clone().map(|u| u.into()),
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image,
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comments_enabled: Some(!self.locked),
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sensitive: Some(self.nsfw),
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stickied: Some(self.stickied),
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published: convert_datetime(self.published),
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updated: self.updated.map(convert_datetime),
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unparsed: Default::default(),
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};
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Ok(page)
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}
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fn to_tombstone(&self) -> Result<Tombstone, LemmyError> {
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create_tombstone(
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self.deleted,
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self.ap_id.to_owned().into(),
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self.updated,
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PageType::Page,
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)
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}
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}
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2020-12-08 17:38:48 +00:00
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#[async_trait::async_trait(?Send)]
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2021-07-27 22:18:50 +00:00
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impl FromApub for Post {
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type ApubType = Page;
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async fn from_apub(
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page: &Page,
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context: &LemmyContext,
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expected_domain: &Url,
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request_counter: &mut i32,
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) -> Result<Post, LemmyError> {
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// We can't verify the domain in case of mod action, because the mod may be on a different
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// instance from the post author.
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let ap_id = if page.is_mod_action(context.pool()).await? {
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page.id_unchecked()
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} else {
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page.id(expected_domain)?
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};
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let ap_id = Some(ap_id.clone().into());
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let creator =
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get_or_fetch_and_upsert_person(&page.attributed_to, context, request_counter).await?;
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let community = extract_community(&page.to, context, request_counter).await?;
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2020-10-12 14:10:09 +00:00
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2021-07-27 22:18:50 +00:00
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let thumbnail_url: Option<Url> = page.image.clone().map(|i| i.url);
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let (post_links_res, pictrs_thumbnail) = if let Some(url) = &page.url {
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fetch_post_links_and_pictrs_data(context.client(), Some(url)).await?
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2021-08-04 21:13:51 +00:00
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} else {
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(None, thumbnail_url)
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};
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let (embed_title, embed_description, embed_html) = post_links_res
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.map(|u| (u.title, u.description, u.html))
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.unwrap_or((None, None, None));
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2020-10-12 14:10:09 +00:00
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2021-07-27 22:18:50 +00:00
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let body_slurs_removed = page.source.as_ref().map(|s| remove_slurs(&s.content));
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let form = PostForm {
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name: page.name.clone(),
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url: page.url.clone().map(|u| u.into()),
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2020-10-12 14:10:09 +00:00
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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: page.comments_enabled.map(|e| !e),
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published: Some(page.published.naive_local()),
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updated: page.updated.map(|u| u.naive_local()),
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2020-10-12 14:10:09 +00:00
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deleted: None,
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nsfw: page.sensitive,
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stickied: page.stickied,
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embed_title,
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embed_description,
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embed_html,
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thumbnail_url: pictrs_thumbnail.map(|u| u.into()),
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ap_id,
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local: Some(false),
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};
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Ok(blocking(context.pool(), move |conn| Post::upsert(conn, &form)).await??)
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2020-10-12 14:10:09 +00:00
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}
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}
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