Remove federation functionality and related tests

- Deleted the `federation.rs` module and its associated functionality for federating thoughts to followers.
- Removed the `well_known.rs` module and its WebFinger discovery functionality.
- Eliminated references to federation in the `thought.rs` router and removed the spawning of background tasks for federating thoughts.
- Deleted tests related to WebFinger and user inbox interactions in `activitypub.rs`.
- Updated `Cargo.toml` to remove the `activitypub_federation` dependency.

thoughts-backend/api/src/routers/mod.rs

@@ -9,9 +9,8 @@ pub mod search;
 pub mod tag;
 pub mod thought;
 pub mod user;
-pub mod well_known;
 
-use crate::routers::{auth::create_auth_router, well_known::create_well_known_router};
+use crate::routers::auth::create_auth_router;
 use app::state::AppState;
 use root::create_root_router;
 use tower_http::cors::CorsLayer;
@@ -24,7 +23,6 @@ pub fn create_router(state: AppState) -> Router {
 
     Router::new()
         .merge(create_root_router())
-        .nest("/.well-known", create_well_known_router())
         .nest("/auth", create_auth_router())
         .nest("/users", create_user_router())
         .nest("/thoughts", create_thought_router())

thoughts-backend/api/src/routers/thought.rs

@@ -20,7 +20,6 @@ use sea_orm::prelude::Uuid;
 use crate::{
     error::ApiError,
     extractor::{AuthUser, Json, OptionalAuthUser, Valid},
-    federation,
     models::{ApiErrorResponse, ParamsErrorResponse},
 };
 
@@ -77,13 +76,6 @@ async fn thoughts_post(
         .await?
         .ok_or(UserError::NotFound)?; // Should not happen if auth is valid
 
-    // Spawn a background task to handle federation without blocking the response
-    tokio::spawn(federation::federate_thought(
-        state.clone(),
-        thought.clone(),
-        author.clone(),
-    ));
-
     let schema = ThoughtSchema::from_models(&thought, &author);
     Ok((StatusCode::CREATED, Json(schema)))
 }

thoughts-backend/api/src/routers/well_known.rs

@@ -1,70 +0,0 @@
-use app::state::AppState;
-use axum::{
-    extract::{Query, State},
-    response::{IntoResponse, Json},
-};
-use serde::{Deserialize, Serialize};
-use url::Url;
-
-#[derive(Deserialize)]
-pub struct WebFingerQuery {
-    resource: String,
-}
-
-#[derive(Serialize)]
-pub struct WebFingerLink {
-    rel: String,
-    #[serde(rename = "type")]
-    type_: String,
-    href: Url,
-}
-
-#[derive(Serialize)]
-pub struct WebFingerResponse {
-    subject: String,
-    links: Vec<WebFingerLink>,
-}
-
-pub async fn webfinger(
-    State(state): State<AppState>,
-    Query(query): Query<WebFingerQuery>,
-) -> Result<impl IntoResponse, impl IntoResponse> {
-    if let Some((scheme, account_info)) = query.resource.split_once(':') {
-        if scheme != "acct" {
-            return Err((
-                axum::http::StatusCode::BAD_REQUEST,
-                "Invalid resource scheme",
-            ));
-        }
-
-        let account_parts: Vec<&str> = account_info.split('@').collect();
-        let username = account_parts[0];
-
-        let user = match app::persistence::user::get_user_by_username(&state.conn, username).await {
-            Ok(Some(user)) => user,
-            _ => return Err((axum::http::StatusCode::NOT_FOUND, "User not found")),
-        };
-
-        let user_url = Url::parse(&format!("{}/users/{}", &state.base_url, user.username)).unwrap();
-
-        let response = WebFingerResponse {
-            subject: query.resource,
-            links: vec![WebFingerLink {
-                rel: "self".to_string(),
-                type_: "application/activity+json".to_string(),
-                href: user_url,
-            }],
-        };
-
-        Ok(Json(response))
-    } else {
-        Err((
-            axum::http::StatusCode::BAD_REQUEST,
-            "Invalid resource format",
-        ))
-    }
-}
-
-pub fn create_well_known_router() -> axum::Router<AppState> {
-    axum::Router::new().route("/webfinger", axum::routing::get(webfinger))
-}