Implemented leaving a gamenight on the server/database side

backend-actix/src/request/join_gamenight.rs

@@ -1,5 +1,5 @@
 use actix_web::{post, web, HttpResponse, Responder};
-use gamenight_database::{DbPool, GetConnection, gamenight_participants::{insert_gamenight_participant, GamenightParticipant}};
+use gamenight_database::{gamenight_participants::{delete_gamenight_participant, insert_gamenight_participant, GamenightParticipant}, DbPool, GetConnection};
 use uuid::Uuid;
 
 use crate::{models::gamenight_id::GamenightId, request::{authorization::AuthUser, error::ApiError}};
@@ -16,3 +16,16 @@ pub async fn post_join_gamenight(pool: web::Data<DbPool>, user: AuthUser, gameni
 
     Ok(HttpResponse::Ok())
 }
+
+#[post("/leave")]
+pub async fn post_leave_gamenight(pool: web::Data<DbPool>, user: AuthUser, gamenight_id: web::Json<GamenightId>) -> Result<impl Responder, ApiError> {
+    web::block(move || -> Result<usize, ApiError> {
+        let mut conn = pool.get_conn();
+        Ok(delete_gamenight_participant(&mut conn, GamenightParticipant {
+            gamenight_id: Uuid::parse_str(&gamenight_id.gamenight_id)?,
+            user_id: user.id
+        })?)
+    }).await??;
+
+    Ok(HttpResponse::Ok())
+}