feat: add simple models

actor, webfinger, activity, object
thanks gargron
https://blog.joinmastodon.org/2018/06/how-to-implement-a-basic-activitypub-server/

Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "anwt"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+chrono = { version = "0.4.31", features = ["serde"] }
+serde = { version = "1.0.193", features = ["derive"] }
+serde_json = "1.0.108"

src/main.rs

@@ -0,0 +1,5 @@
+pub mod model;
+
+fn main() {
+	println!("Hello, world!");
+}

src/model/activity.rs

@@ -0,0 +1,45 @@
+use serde::{Serialize, Deserialize};
+
+use super::object::Object;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Activity {
+	#[serde(rename = "@context")]
+	context: String,
+
+	id: String,
+
+	#[serde(rename = "type")]
+	activity_type: ActivityType,
+
+	actor: String,
+
+	object: Object,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum ActivityType {
+	Create,
+}
+
+#[cfg(test)]
+mod test {
+	use super::{Activity, ActivityType};
+	use crate::model::object::Object;
+
+	#[test]
+	fn activity_serializes_as_expected() {
+		let activity = Activity {
+			context: "https://www.w3.org/ns/activitystreams".into(),
+			id: "https://my-example.com/create-hello-world".into(),
+			activity_type: ActivityType::Create,
+			actor: "https://my-example.com/actor".into(),
+			object: Object::default(),
+		};
+
+		let serialized_activity = serde_json::to_string(&activity).unwrap();
+		let expected_serialized_activity = "{\"@context\":\"https://www.w3.org/ns/activitystreams\",\"id\":\"https://my-example.com/create-hello-world\",\"type\":\"Create\",\"actor\":\"https://my-example.com/actor\",\"object\":{\"id\":\"https://my-example.com/hello-world\",\"type\":\"Note\",\"published\":\"2018-06-23T17:17:11Z\",\"attributedTo\":\"https://my-example.com/actor\",\"inReplyTo\":\"https://mastodon.social/@Gargron/100254678717223630\",\"content\":\"<p>Hello world</p>\",\"to\":\"https://www.w3.org/ns/activitystreams#Public\"}}";
+
+		assert_eq!(serialized_activity, expected_serialized_activity);
+	}
+}

src/model/actor.rs

@@ -0,0 +1,57 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Actor {
+	#[serde(rename = "@context")]
+	pub context: Vec<String>,  // note: must be @context
+	pub id: String,
+	#[serde(rename = "type")]
+	pub actor_type: ActorType,
+	#[serde(rename = "preferredUsername")]
+	pub preferred_username: String,
+	pub inbox: String,
+	#[serde(rename = "publicKey")]
+	pub public_key: PublicKey,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PublicKey {
+	pub id: String,
+	pub owner: String,
+	#[serde(rename = "publicKeyPem")]
+	pub public_key_pem: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum ActorType {
+	Person,
+}
+
+#[cfg(test)]
+mod test {
+	use super::{Actor, ActorType, PublicKey};
+
+	#[test]
+	fn actor_serializes_as_expected() {
+		let actor = Actor {
+			context: vec![
+				"https://www.w3.org/ns/activitystreams".into(),
+				"https://w3id.org/security/v1".into()
+			],
+			id: "https://my-example.com/actor".into(),
+			actor_type: ActorType::Person,
+			preferred_username: "alice".into(),
+			inbox: "https://my-example.com/inbox".into(),
+			public_key: PublicKey {
+				id: "https://my-example.com/actor#main-key".into(),
+				owner: "https://my-example.com/actor".into(),
+				public_key_pem: "-----BEGIN PUBLIC KEY-----...-----END PUBLIC KEY-----".into(),
+			},
+		};
+
+		let serialized_actor = serde_json::to_string(&actor).unwrap();
+		let expected_serialized_actor = "{\"@context\":[\"https://www.w3.org/ns/activitystreams\",\"https://w3id.org/security/v1\"],\"id\":\"https://my-example.com/actor\",\"type\":\"Person\",\"preferredUsername\":\"alice\",\"inbox\":\"https://my-example.com/inbox\",\"publicKey\":{\"id\":\"https://my-example.com/actor#main-key\",\"owner\":\"https://my-example.com/actor\",\"publicKeyPem\":\"-----BEGIN PUBLIC KEY-----...-----END PUBLIC KEY-----\"}}";
+
+		assert_eq!(expected_serialized_actor, serialized_actor);
+	}
+}

src/model/mod.rs

@@ -0,0 +1,4 @@
+pub mod activity;
+pub mod actor;
+pub mod webfinger;
+pub mod object;

src/model/object.rs

@@ -0,0 +1,57 @@
+use chrono::{Utc, DateTime};
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Object {
+	id: String,
+
+	#[serde(rename = "type")]
+	object_type: ObjectType,
+
+	published: DateTime<Utc>,
+
+	#[serde(rename = "attributedTo")]
+	attributed_to: String,
+
+	#[serde(rename = "inReplyTo")]
+	in_reply_to: String,
+
+	content: String,
+
+	to: String,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub enum ObjectType {
+	Note,
+}
+
+#[cfg(test)]
+impl Default for Object {
+	fn default() -> Self {
+		Object {
+			id: "https://my-example.com/hello-world".into(),
+			object_type: ObjectType::Note,
+			published: DateTime::parse_from_rfc3339("2018-06-23T17:17:11Z").unwrap().into(),
+			attributed_to: "https://my-example.com/actor".into(),
+			in_reply_to: "https://mastodon.social/@Gargron/100254678717223630".into(),
+			content: "<p>Hello world</p>".into(),
+			to: "https://www.w3.org/ns/activitystreams#Public".into(),
+		}
+	}
+}
+
+#[cfg(test)]
+mod test {
+	use super::Object;
+
+	#[test]
+	fn object_serializes_as_expected() {
+		let object = Object::default();
+
+		let serialized_object = serde_json::to_string(&object).unwrap();
+		let expected_serialized_object = "{\"id\":\"https://my-example.com/hello-world\",\"type\":\"Note\",\"published\":\"2018-06-23T17:17:11Z\",\"attributedTo\":\"https://my-example.com/actor\",\"inReplyTo\":\"https://mastodon.social/@Gargron/100254678717223630\",\"content\":\"<p>Hello world</p>\",\"to\":\"https://www.w3.org/ns/activitystreams#Public\"}";
+
+		assert_eq!(serialized_object, expected_serialized_object);
+	}
+}

src/model/webfinger.rs

@@ -0,0 +1,40 @@
+use serde::{Serialize, Deserialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Webfinger {
+	subject: String,
+	links: Vec<WebfingerLink>,
+}
+
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WebfingerLink {
+	rel: String,
+	#[serde(rename = "type")]
+	link_type: String,
+	href: String,
+}
+
+#[cfg(test)]
+mod test {
+	use super::{Webfinger, WebfingerLink};
+
+	#[test]
+	fn webfinger_serializes_as_expected() {
+		let webfinger = Webfinger {
+			subject: "acct:alice@my-example.com".into(),
+			links: vec![
+				WebfingerLink {
+					rel: "self".into(),
+					link_type: "application/activity+json".into(),
+					href: "https://my-example.com/actor".into(),
+				},
+			],
+		};
+
+		let serialized_webfinger = serde_json::to_string(&webfinger).unwrap();
+		let expected_serialized_webfinger = "{\"subject\":\"acct:alice@my-example.com\",\"links\":[{\"rel\":\"self\",\"type\":\"application/activity+json\",\"href\":\"https://my-example.com/actor\"}]}";
+
+		assert_eq!(serialized_webfinger, expected_serialized_webfinger);
+	}
+}