Rewrite to chatty but functional API.

backend-actix/src/request/participant_handlers.rs

@@ -0,0 +1,17 @@
+use actix_web::{get, http::header::ContentType, web, HttpResponse, Responder};
+use gamenight_database::{DbPool, GetConnection};
+use uuid::Uuid;
+
+use crate::{models::{gamenight_id::GamenightId, participants::Participants}, request::{authorization::AuthUser, error::ApiError}};
+
+#[get("/participants")]
+pub async fn get_get_participants(pool: web::Data<DbPool>, _user: AuthUser, gamenight_info: web::Json<GamenightId>) -> Result<impl Responder, ApiError> {
+    let mut conn = pool.get_conn();
+    
+    let users = gamenight_database::get_participants(&mut conn, &Uuid::parse_str(&gamenight_info.into_inner().gamenight_id)?)?
+        .iter().map(|x| x.to_string()).collect();
+    
+    Ok(HttpResponse::Ok()
+        .content_type(ContentType::json())
+        .body(serde_json::to_string(&Participants{participants: users})?))
+}