implement leaderboard endpoint

1 files changed, 28 insertions, 1 deletions

diff --git a/planetwars-server/src/db/ratings.rs b/planetwars-server/src/db/ratings.rs
index bee8548..8262fed 100644
--- a/planetwars-server/src/db/ratings.rs
+++ b/planetwars-server/src/db/ratings.rs
@@ -1,7 +1,8 @@
 use diesel::{prelude::*, PgConnection, QueryResult};
 use serde::{Deserialize, Serialize};
 
-use crate::schema::{bots, ratings};
+use crate::db::bots::Bot;
+use crate::schema::{bots, ratings, users};
 
 #[derive(Queryable, Debug, Insertable, PartialEq, Serialize, Deserialize)]
 pub struct Rating {
@@ -25,3 +26,29 @@ pub fn set_rating(bot_id: i32, rating: f64, db_conn: &PgConnection) -> QueryResu
         .set(ratings::rating.eq(rating))
         .execute(db_conn)
 }
+
+#[derive(Queryable, Serialize, Deserialize)]
+pub struct Author {
+    id: i32,
+    username: String,
+}
+
+#[derive(Queryable, Serialize, Deserialize)]
+pub struct RankedBot {
+    pub bot: Bot,
+    pub author: Option<Author>,
+    pub rating: f64,
+}
+
+pub fn get_bot_ranking(db_conn: &PgConnection) -> QueryResult<Vec<RankedBot>> {
+    bots::table
+        .left_join(users::table)
+        .inner_join(ratings::table)
+        .select((
+            bots::all_columns,
+            (users::id, users::username).nullable(),
+            ratings::rating,
+        ))
+        .order_by(ratings::rating.desc())
+        .get_results(db_conn)
+}