From af2f09ea4cbb97d3ee91e30bb58e85508989d63a Mon Sep 17 00:00:00 2001
From: clarkzjw <i@jinwei.me>
Date: Wed, 26 Jul 2023 12:37:38 -0700
Subject: add example from
 https://github.com/LemmyNet/activitypub-federation-rust

---
 fedi/live_federation/objects/person.rs | 140 +++++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 fedi/live_federation/objects/person.rs

(limited to 'fedi/live_federation/objects/person.rs')

diff --git a/fedi/live_federation/objects/person.rs b/fedi/live_federation/objects/person.rs
new file mode 100644
index 0000000..d9439ea
--- /dev/null
+++ b/fedi/live_federation/objects/person.rs
@@ -0,0 +1,140 @@
+use crate::{activities::create_post::CreatePost, database::DatabaseHandle, error::Error};
+use activitypub_federation::{
+    config::Data,
+    fetch::object_id::ObjectId,
+    http_signatures::generate_actor_keypair,
+    kinds::actor::PersonType,
+    protocol::{public_key::PublicKey, verification::verify_domains_match},
+    traits::{ActivityHandler, Actor, Object},
+};
+use chrono::{DateTime, Utc};
+use serde::{Deserialize, Serialize};
+use std::fmt::Debug;
+use url::Url;
+
+#[derive(Debug, Clone)]
+pub struct DbUser {
+    pub name: String,
+    pub ap_id: ObjectId<DbUser>,
+    pub inbox: Url,
+    // exists for all users (necessary to verify http signatures)
+    pub public_key: String,
+    // exists only for local users
+    pub private_key: Option<String>,
+    last_refreshed_at: DateTime<Utc>,
+    pub followers: Vec<Url>,
+    pub local: bool,
+}
+
+/// List of all activities which this actor can receive.
+#[derive(Deserialize, Serialize, Debug)]
+#[serde(untagged)]
+#[enum_delegate::implement(ActivityHandler)]
+pub enum PersonAcceptedActivities {
+    CreateNote(CreatePost),
+}
+
+impl DbUser {
+    pub fn new(hostname: &str, name: &str) -> Result<DbUser, Error> {
+        let ap_id = Url::parse(&format!("https://{}/{}", hostname, &name))?.into();
+        let inbox = Url::parse(&format!("https://{}/{}/inbox", hostname, &name))?;
+        let keypair = generate_actor_keypair()?;
+        Ok(DbUser {
+            name: name.to_string(),
+            ap_id,
+            inbox,
+            public_key: keypair.public_key,
+            private_key: Some(keypair.private_key),
+            last_refreshed_at: Utc::now(),
+            followers: vec![],
+            local: true,
+        })
+    }
+}
+
+#[derive(Clone, Debug, Deserialize, Serialize)]
+#[serde(rename_all = "camelCase")]
+pub struct Person {
+    #[serde(rename = "type")]
+    kind: PersonType,
+    preferred_username: String,
+    id: ObjectId<DbUser>,
+    inbox: Url,
+    public_key: PublicKey,
+}
+
+#[async_trait::async_trait]
+impl Object for DbUser {
+    type DataType = DatabaseHandle;
+    type Kind = Person;
+    type Error = Error;
+
+    fn last_refreshed_at(&self) -> Option<DateTime<Utc>> {
+        Some(self.last_refreshed_at)
+    }
+
+    async fn read_from_id(
+        object_id: Url,
+        data: &Data<Self::DataType>,
+    ) -> Result<Option<Self>, Self::Error> {
+        let users = data.users.lock().unwrap();
+        let res = users
+            .clone()
+            .into_iter()
+            .find(|u| u.ap_id.inner() == &object_id);
+        Ok(res)
+    }
+
+    async fn into_json(self, _data: &Data<Self::DataType>) -> Result<Self::Kind, Self::Error> {
+        Ok(Person {
+            preferred_username: self.name.clone(),
+            kind: Default::default(),
+            id: self.ap_id.clone(),
+            inbox: self.inbox.clone(),
+            public_key: self.public_key(),
+        })
+    }
+
+    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> {
+        Ok(DbUser {
+            name: json.preferred_username,
+            ap_id: json.id,
+            inbox: json.inbox,
+            public_key: json.public_key.public_key_pem,
+            private_key: None,
+            last_refreshed_at: Utc::now(),
+            followers: vec![],
+            local: false,
+        })
+    }
+}
+
+impl Actor for DbUser {
+    fn id(&self) -> Url {
+        self.ap_id.inner().clone()
+    }
+
+    fn public_key_pem(&self) -> &str {
+        &self.public_key
+    }
+
+    fn private_key_pem(&self) -> Option<String> {
+        self.private_key.clone()
+    }
+
+    fn inbox(&self) -> Url {
+        self.inbox.clone()
+    }
+}
-- 
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