add example from https://github.com/LemmyNet/activitypub-federation-rust

1 files changed, 104 insertions, 0 deletions

diff --git a/fedi/live_federation/objects/post.rs b/fedi/live_federation/objects/post.rs
new file mode 100644
index 0000000..9a08b9d
--- /dev/null
+++ b/fedi/live_federation/objects/post.rs
@@ -0,0 +1,104 @@
+use crate::{
+    activities::create_post::CreatePost,
+    database::DatabaseHandle,
+    error::Error,
+    generate_object_id,
+    objects::person::DbUser,
+};
+use activitypub_federation::{
+    config::Data,
+    fetch::object_id::ObjectId,
+    kinds::{object::NoteType, public},
+    protocol::{helpers::deserialize_one_or_many, verification::verify_domains_match},
+    traits::{Actor, Object},
+};
+use activitystreams_kinds::link::MentionType;
+use serde::{Deserialize, Serialize};
+use url::Url;
+
+#[derive(Clone, Debug)]
+pub struct DbPost {
+    pub text: String,
+    pub ap_id: ObjectId<DbPost>,
+    pub creator: ObjectId<DbUser>,
+    pub local: bool,
+}
+
+#[derive(Deserialize, Serialize, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct Note {
+    #[serde(rename = "type")]
+    kind: NoteType,
+    id: ObjectId<DbPost>,
+    pub(crate) attributed_to: ObjectId<DbUser>,
+    #[serde(deserialize_with = "deserialize_one_or_many")]
+    pub(crate) to: Vec<Url>,
+    content: String,
+    in_reply_to: Option<ObjectId<DbPost>>,
+    tag: Vec<Mention>,
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+pub struct Mention {
+    pub href: Url,
+    #[serde(rename = "type")]
+    pub kind: MentionType,
+}
+
+#[async_trait::async_trait]
+impl Object for DbPost {
+    type DataType = DatabaseHandle;
+    type Kind = Note;
+    type Error = Error;
+
+    async fn read_from_id(
+        _object_id: Url,
+        _data: &Data<Self::DataType>,
+    ) -> Result<Option<Self>, Self::Error> {
+        Ok(None)
+    }
+
+    async fn into_json(self, _data: &Data<Self::DataType>) -> Result<Self::Kind, Self::Error> {
+        unimplemented!()
+    }
+
+    async fn verify(
+        json: &Self::Kind,
+        expected_domain: &Url,
+        _data: &Data<Self::DataType>,
+    ) -> Result<(), Self::Error> {
+        verify_domains_match(json.id.inner(), expected_domain)?;
+        Ok(())
+    }
+
+    async fn from_json(json: Self::Kind, data: &Data<Self::DataType>) -> Result<Self, Self::Error> {
+        println!(
+            "Received post with content {} and id {}",
+            &json.content, &json.id
+        );
+        let creator = json.attributed_to.dereference(data).await?;
+        let post = DbPost {
+            text: json.content,
+            ap_id: json.id.clone(),
+            creator: json.attributed_to.clone(),
+            local: false,
+        };
+
+        let mention = Mention {
+            href: creator.ap_id.clone().into_inner(),
+            kind: Default::default(),
+        };
+        let note = Note {
+            kind: Default::default(),
+            id: generate_object_id(data.domain())?.into(),
+            attributed_to: data.local_user().ap_id,
+            to: vec![public()],
+            content: format!("Hello {}", creator.name),
+            in_reply_to: Some(json.id.clone()),
+            tag: vec![mention],
+        };
+        CreatePost::send(note, creator.shared_inbox_or_inbox(), data).await?;
+
+        Ok(post)
+    }
+}