Add NodeInfo endpoints (fixes #11)

src/main.rs

@@ -79,6 +79,7 @@ fn main() {
             routes::instance::configure,
             routes::instance::post_config,
             routes::instance::shared_inbox,
+            routes::instance::nodeinfo,
 
             routes::likes::create,
             routes::likes::create_auth,
@@ -120,6 +121,7 @@ fn main() {
             routes::user::create,
 
             routes::well_known::host_meta,
+            routes::well_known::nodeinfo,
             routes::well_known::webfinger
         ])
         .manage(init_pool())

src/models/comments.rs

@@ -3,7 +3,7 @@ use activitypub::{
     object::{Note, properties::ObjectProperties}
 };
 use chrono;
-use diesel::{self, PgConnection, RunQueryDsl, QueryDsl, ExpressionMethods};
+use diesel::{self, PgConnection, RunQueryDsl, QueryDsl, ExpressionMethods, dsl::any};
 use serde_json;
 
 use activity_pub::{
@@ -12,6 +12,7 @@ use activity_pub::{
     object::Object
 };
 use models::{
+    instance::Instance,
     posts::Post,
     users::User
 };
@@ -110,6 +111,15 @@ impl Comment {
         act.object_props.set_id_string(format!("{}/activity", self.ap_url.clone().unwrap())).unwrap();
         act
     }
+
+    pub fn count_local(conn: &PgConnection) -> usize {
+        use schema::users;
+        let local_authors = users::table.filter(users::instance_id.eq(Instance::local_id(conn))).select(users::id);
+        comments::table.filter(comments::author_id.eq(any(local_authors)))
+            .load::<Comment>(conn)
+            .expect("Couldn't load local comments")
+            .len()
+    }
 }
 
 impl Object for Comment {

src/models/posts.rs

@@ -1,8 +1,7 @@
 use activitypub::activity::Create;
 use activitystreams_types::object::{Article, properties::ObjectProperties};
 use chrono::NaiveDateTime;
-use diesel::{self, PgConnection, RunQueryDsl, QueryDsl, ExpressionMethods, BelongingToDsl};
+use diesel::{self, PgConnection, RunQueryDsl, QueryDsl, ExpressionMethods, BelongingToDsl, dsl::any};
-use diesel::dsl::any;
 use serde_json;
 
 use BASE_URL;
@@ -13,6 +12,7 @@ use activity_pub::{
 };
 use models::{
     blogs::Blog,
+    instance::Instance,
     likes::Like,
     post_authors::PostAuthor,
     reshares::Reshare,
@@ -61,6 +61,17 @@ impl Post {
             .into_iter().nth(0)
     }
 
+    pub fn count_local(conn: &PgConnection) -> usize {
+        use schema::post_authors;
+        use schema::users;
+        let local_authors = users::table.filter(users::instance_id.eq(Instance::local_id(conn))).select(users::id);
+        let local_posts_id = post_authors::table.filter(post_authors::author_id.eq(any(local_authors))).select(post_authors::post_id);
+        posts::table.filter(posts::id.eq(any(local_posts_id)))
+            .load::<Post>(conn)
+            .expect("Couldn't load local posts")
+            .len()
+    }
+
     pub fn find_by_slug(conn: &PgConnection, slug: String) -> Option<Post> {
         posts::table.filter(posts::slug.eq(slug))
             .limit(1)

src/models/users.rs

@@ -119,6 +119,13 @@ impl User {
             .into_iter().nth(0)
     }
 
+    pub fn count_local(conn: &PgConnection) -> usize {
+        users::table.filter(users::instance_id.eq(Instance::local_id(conn)))
+            .load::<User>(conn)
+            .expect("Couldn't load local users")
+            .len()
+    }
+
     pub fn find_by_email(conn: &PgConnection, email: String) -> Option<User> {
         users::table.filter(users::email.eq(email))
             .limit(1)

src/routes/instance.rs

@@ -1,11 +1,12 @@
 use rocket::{request::Form, response::Redirect};
-use rocket_contrib::Template;
+use rocket_contrib::{Json, Template};
 use serde_json;
 
 use BASE_URL;
 use activity_pub::inbox::Inbox;
 use db_conn::DbConn;
 use models::{
+    comments::Comment,
     posts::Post,
     users::User,
     instance::*
@@ -75,3 +76,28 @@ fn shared_inbox(conn: DbConn, data: String) -> String {
     instance.received(&*conn, act);
     String::from("")
 }
+
+#[get("/nodeinfo")]
+fn nodeinfo(conn: DbConn) -> Json {
+    Json(json!({
+        "version": "2.0",
+        "software": {
+            "name": "Plume",
+            "version": "0.1.0"
+        },
+        "protocols": ["activitypub"],
+        "services": {
+            "inbound": [],
+            "outbound": []
+        },
+        "openRegistrations": true,
+        "usage": {
+            "users": {
+                "total": User::count_local(&*conn)
+            },
+            "localPosts": Post::count_local(&*conn),
+            "localComments": Comment::count_local(&*conn)
+        },
+        "metadata": {}
+    }))
+}

src/routes/well_known.rs

@@ -6,6 +6,18 @@ use activity_pub::{ap_url, webfinger::Webfinger};
 use db_conn::DbConn;
 use models::{blogs::Blog, users::User};
 
+#[get("/.well-known/nodeinfo")]
+fn nodeinfo() -> Content<String> {
+    Content(ContentType::new("application", "jrd+json"), json!({
+        "links": [
+            {
+                "rel": "http://nodeinfo.diaspora.software/ns/schema/2.0",
+                "href": ap_url(format!("{domain}/nodeinfo", domain = BASE_URL.as_str()))
+            }
+        ]
+    }).to_string())
+}
+
 #[get("/.well-known/host-meta", format = "application/xml")]
 fn host_meta() -> String {
     format!(r#"