From e6e29440563e33bb67e0ad51f9fb6c5c2c3fe809 Mon Sep 17 00:00:00 2001
From: Elizabeth Hunt <elizabeth.hunt@simponic.xyz>
Date: Thu, 7 Mar 2024 20:45:47 -0700
Subject: level one (applications prototype finished!)

---
 src/engine/systems/Music.ts | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 src/engine/systems/Music.ts

(limited to 'src/engine/systems/Music.ts')

diff --git a/src/engine/systems/Music.ts b/src/engine/systems/Music.ts
new file mode 100644
index 0000000..6e2004d
--- /dev/null
+++ b/src/engine/systems/Music.ts
@@ -0,0 +1,40 @@
+import { System, SystemNames } from ".";
+import { Music as GameMusic, SOUNDS } from "../config";
+
+export class Music extends System {
+  private songs: string[] = [];
+  private currentSong?: string;
+
+  constructor() {
+    super(SystemNames.Music);
+
+    this.songs = Array.from(GameMusic.states!.values()).map(
+      (state) => state.name,
+    );
+  }
+
+  private chooseRandomSong() {
+    return this.songs[Math.floor(Math.random() * this.songs.length)];
+  }
+
+  public playNext() {
+    let nextSong = this.chooseRandomSong();
+    while (nextSong === this.currentSong) {
+      nextSong = this.chooseRandomSong();
+    }
+
+    this.currentSong = nextSong;
+    SOUNDS.get(this.currentSong)?.play();
+
+    // when done, play next song
+    SOUNDS.get(this.currentSong)?.addEventListener("ended", () => {
+      this.playNext();
+    });
+  }
+
+  public update(_dt: number) {
+    if (!this.currentSong) {
+      this.playNext();
+    }
+  }
+}
-- 
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