move match running logic to separate module

1 files changed, 30 insertions, 3 deletions

diff --git a/planetwars-server/src/modules/ranking.rs b/planetwars-server/src/modules/ranking.rs
index 739e6a6..53e1e4e 100644
--- a/planetwars-server/src/modules/ranking.rs
+++ b/planetwars-server/src/modules/ranking.rs
@@ -1,5 +1,32 @@
-use crate::DbPool;
+use crate::{db::bots::Bot, DbPool};
 
-pub async fn run_ranker(_db_pool: DbPool) {
-    // do nothing, for now
+use crate::db;
+use diesel::PgConnection;
+use rand::seq::SliceRandom;
+use std::time::Duration;
+use tokio;
+
+pub async fn run_ranker(db_pool: DbPool) {
+    // TODO: make this configurable
+    // play at most one match every n seconds
+    let mut interval = tokio::time::interval(Duration::from_secs(10));
+    let db_conn = db_pool
+        .get()
+        .await
+        .expect("could not get database connection");
+    loop {
+        interval.tick().await;
+        let bots = db::bots::find_all_bots(&db_conn).unwrap();
+        if bots.len() < 2 {
+            // not enough bots to play a match
+            continue;
+        }
+        let selected_bots: Vec<Bot> = {
+            let mut rng = &mut rand::thread_rng();
+            bots.choose_multiple(&mut rng, 2).cloned().collect()
+        };
+        play_match(selected_bots, db_pool.clone()).await;
+    }
 }
+
+async fn play_match(selected_bots: Vec<Bot>, db_pool: DbPool) {}