From 5dba0da3efae63cab5313582a17f20dbb41c6450 Mon Sep 17 00:00:00 2001
From: nsfisis <nsfisis@gmail.com>
Date: Wed, 21 Aug 2024 02:46:06 +0900
Subject: feat(frontend): partially implement sound effect

---
 frontend/app/.client/audio/AudioController.ts | 94 +++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 frontend/app/.client/audio/AudioController.ts

(limited to 'frontend/app/.client/audio/AudioController.ts')

diff --git a/frontend/app/.client/audio/AudioController.ts b/frontend/app/.client/audio/AudioController.ts
new file mode 100644
index 0000000..6ed6180
--- /dev/null
+++ b/frontend/app/.client/audio/AudioController.ts
@@ -0,0 +1,94 @@
+import { SoundEffect, getFileUrl } from "./SoundEffect";
+
+export class AudioController {
+	audioElements: Record<SoundEffect, HTMLAudioElement | null>;
+
+	constructor() {
+		this.audioElements = {
+			finish: null,
+			winner_1: null,
+			winner_2: null,
+			good_1: null,
+			good_2: null,
+			good_3: null,
+			good_4: null,
+			new_score_1: null,
+			new_score_2: null,
+			new_score_3: null,
+			compile_error_1: null,
+			compile_error_2: null,
+		};
+	}
+
+	loadAll(): Promise<void> {
+		return new Promise((resolve) => {
+			const files = Object.keys(this.audioElements).map(
+				(se) => [se as SoundEffect, getFileUrl(se as SoundEffect)] as const,
+			);
+			const totalCount = files.length;
+			let loadedCount = 0;
+
+			files.forEach(([se, fileUrl]) => {
+				const audio = new Audio(fileUrl);
+
+				audio.addEventListener(
+					"canplaythrough",
+					() => {
+						loadedCount++;
+						this.audioElements[se] = audio;
+						if (loadedCount === totalCount) {
+							resolve();
+						}
+					},
+					{ once: true },
+				);
+
+				audio.addEventListener("error", () => {
+					console.log(`Failed to load audio file: ${fileUrl}`);
+					// Ignore the error and continue loading other files.
+				});
+			});
+		});
+	}
+
+	async playSoundEffect(soundEffect: SoundEffect): Promise<void> {
+		const audio = this.audioElements[soundEffect];
+		if (!audio) {
+			return;
+		}
+		audio.currentTime = 0;
+		await audio.play();
+	}
+
+	async playSoundEffectFinish(): Promise<void> {
+		await this.playSoundEffect("finish");
+	}
+
+	async playSoundEffectWinner(winner: 1 | 2): Promise<void> {
+		await this.playSoundEffect(`winner_${winner}`);
+	}
+
+	async playSoundEffectGood(): Promise<void> {
+		const variant = Math.floor(Math.random() * 4) + 1;
+		if (variant !== 1 && variant !== 2 && variant !== 3 && variant !== 4) {
+			return; // unreachable
+		}
+		return await this.playSoundEffect(`good_${variant}`);
+	}
+
+	async playSoundEffectNewScore(): Promise<void> {
+		const variant = Math.floor(Math.random() * 3) + 1;
+		if (variant !== 1 && variant !== 2 && variant !== 3) {
+			return; // unreachable
+		}
+		return await this.playSoundEffect(`new_score_${variant}`);
+	}
+
+	async playSoundEffectCompileError(): Promise<void> {
+		const variant = Math.floor(Math.random() * 2) + 1;
+		if (variant !== 1 && variant !== 2) {
+			return; // unreachable
+		}
+		return await this.playSoundEffect(`compile_error_${variant}`);
+	}
+}
-- 
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