121 lines
3.7 KiB
Rust
121 lines
3.7 KiB
Rust
use serde::Deserialize;
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use serde_json::Value;
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use mitra_config::Config;
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use crate::activitypub::{
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fetcher::helpers::{get_or_import_profile_by_actor_id, import_post},
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identifiers::parse_local_object_id,
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receiver::deserialize_into_object_id,
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vocabulary::{CREATE, DELETE, DISLIKE, LIKE, NOTE, UNDO, UPDATE},
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};
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use crate::database::{DatabaseClient, DatabaseError};
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use crate::errors::ValidationError;
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use crate::media::MediaStorage;
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use crate::models::{
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posts::queries::{
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create_post,
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get_post_by_remote_object_id,
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},
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posts::types::PostCreateData,
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};
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use super::HandlerResult;
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#[derive(Deserialize)]
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struct Announce {
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id: String,
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actor: String,
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#[serde(deserialize_with = "deserialize_into_object_id")]
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object: String,
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}
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pub async fn handle_announce(
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config: &Config,
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db_client: &mut impl DatabaseClient,
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activity: Value,
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) -> HandlerResult {
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if let Some(CREATE | DELETE | DISLIKE | LIKE | UNDO | UPDATE) =
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activity["object"]["type"].as_str()
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{
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// Ignore wrapped activities from Lemmy
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// https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-1b12.md
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return Ok(None);
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};
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let activity: Announce = serde_json::from_value(activity)
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.map_err(|_| ValidationError("unexpected activity structure"))?;
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let repost_object_id = activity.id;
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match get_post_by_remote_object_id(
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db_client,
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&repost_object_id,
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).await {
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Ok(_) => return Ok(None), // Ignore if repost already exists
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Err(DatabaseError::NotFound(_)) => (),
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Err(other_error) => return Err(other_error.into()),
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};
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let author = get_or_import_profile_by_actor_id(
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db_client,
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&config.instance(),
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&MediaStorage::from(config),
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&activity.actor,
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).await?;
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let post_id = match parse_local_object_id(
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&config.instance_url(),
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&activity.object,
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) {
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Ok(post_id) => post_id,
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Err(_) => {
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// Try to get remote post
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let post = import_post(config, db_client, activity.object, None).await?;
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post.id
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},
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};
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let repost_data = PostCreateData::repost(
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post_id,
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Some(repost_object_id.clone()),
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);
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match create_post(db_client, &author.id, repost_data).await {
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Ok(_) => Ok(Some(NOTE)),
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Err(DatabaseError::AlreadyExists("post")) => {
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// Ignore activity if repost already exists (with a different
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// object ID, or due to race condition in a handler).
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log::warn!("repost already exists: {}", repost_object_id);
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Ok(None)
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},
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// May return "post not found" error if post if not public
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Err(other_error) => Err(other_error.into()),
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}
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}
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#[cfg(test)]
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mod tests {
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use serde_json::json;
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use super::*;
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#[test]
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fn test_deserialize_announce() {
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let activity_raw = json!({
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"type": "Announce",
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"id": "https://example.com/activities/321",
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"actor": "https://example.com/users/1",
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"object": "https://test.org/objects/999",
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});
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let activity: Announce = serde_json::from_value(activity_raw).unwrap();
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assert_eq!(activity.object, "https://test.org/objects/999");
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}
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#[test]
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fn test_deserialize_announce_nested() {
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let activity_raw = json!({
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"type": "Announce",
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"id": "https://example.com/activities/321",
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"actor": "https://example.com/users/1",
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"object": {
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"type": "Note",
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"id": "https://test.org/objects/999",
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},
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});
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let activity: Announce = serde_json::from_value(activity_raw).unwrap();
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assert_eq!(activity.object, "https://test.org/objects/999");
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}
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}
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