From 7bfca6df07bad97d4519110ca03e0ba2f146e01a Mon Sep 17 00:00:00 2001
From: kakkokari-gtyih <67428053+kakkokari-gtyih@users.noreply.github.com>
Date: Sun, 9 Feb 2025 16:10:18 +0900
Subject: [PATCH] introduce analytics wrapper

---
 packages/frontend/src/analytics.ts   | 103 +++++++++++++++++++++++++++
 packages/frontend/src/boot/common.ts |   9 +++
 2 files changed, 112 insertions(+)
 create mode 100644 packages/frontend/src/analytics.ts

diff --git a/packages/frontend/src/analytics.ts b/packages/frontend/src/analytics.ts
new file mode 100644
index 0000000000..f19ba761ba
--- /dev/null
+++ b/packages/frontend/src/analytics.ts
@@ -0,0 +1,103 @@
+import * as Misskey from 'misskey-js';
+import type { AnalyticsInstance, AnalyticsPlugin } from 'analytics';
+
+/**
+ * analytics moduleを読み込まなくても動作するようにするためのラッパー
+ */
+class AnalyticsProxy implements AnalyticsInstance {
+	private analytics?: AnalyticsInstance;
+
+	constructor(analytics?: AnalyticsInstance) {
+		if (analytics) {
+			this.analytics = analytics;
+		}
+	}
+
+	public setAnalytics(analytics: AnalyticsInstance) {
+		if (this.analytics) {
+			throw new Error('Analytics instance already exists.');
+		}
+		this.analytics = analytics;
+	}
+
+	public identify(...args: Parameters<AnalyticsInstance['identify']>) {
+		return this.analytics?.identify(...args) ?? Promise.resolve();
+	}
+
+	public track(...args: Parameters<AnalyticsInstance['track']>) {
+		return this.analytics?.track(...args) ?? Promise.resolve();
+	}
+
+	public page(...args: Parameters<AnalyticsInstance['page']>) {
+		return this.analytics?.page(...args) ?? Promise.resolve();
+	}
+
+	public user(...args: Parameters<AnalyticsInstance['user']>) {
+		return this.analytics?.user(...args) ?? Promise.resolve();
+	}
+
+	public reset(...args: Parameters<AnalyticsInstance['reset']>) {
+		return this.analytics?.reset(...args) ?? Promise.resolve();
+	}
+
+	public ready(...args: Parameters<AnalyticsInstance['ready']>) {
+		return this.analytics?.ready(...args) ?? function () { void 0; };
+	}
+
+	public on(...args: Parameters<AnalyticsInstance['on']>) {
+		return this.analytics?.on(...args) ?? function () { void 0; };
+	}
+
+	public once(...args: Parameters<AnalyticsInstance['once']>) {
+		return this.analytics?.once(...args) ?? function () { void 0; };
+	}
+
+	public getState(...args: Parameters<AnalyticsInstance['getState']>) {
+		return this.analytics?.getState(...args) ?? Promise.resolve();
+	}
+
+	public get storage() {
+		return this.analytics?.storage ?? {
+			getItem: () => null,
+			setItem: () => void 0,
+			removeItem: () => void 0,
+		};
+	}
+
+	public get plugins() {
+		return this.analytics?.plugins ?? {
+			enable: (p, c) => Promise.resolve(c ? c() : void 0),
+			disable: (p, c) => Promise.resolve(c ? c() : void 0),
+		};
+	}
+}
+
+export const analytics = new AnalyticsProxy();
+
+export async function initAnalytics(instance: Misskey.entities.MetaDetailed) {
+
+	// アナリティクスプロバイダに関する設定がひとつもない場合は、アナリティクスモジュールを読み込まない
+	if (!instance.googleAnalyticsMeasurementId) {
+		return;
+	}
+
+	const { default: Analytics } = await import('analytics');
+	const plugins: AnalyticsPlugin[] = [];
+
+	// Google Analytics
+	if (instance.googleAnalyticsMeasurementId) {
+		const { default: googleAnalytics } = await import('@analytics/google-analytics');
+
+		plugins.push(googleAnalytics({
+			measurementIds: [instance.googleAnalyticsMeasurementId],
+			debug: _DEV_,
+		}));
+	}
+
+	analytics.setAnalytics(Analytics({
+		app: 'misskey',
+		version: _VERSION_,
+		debug: _DEV_,
+		plugins,
+	}));
+}
diff --git a/packages/frontend/src/boot/common.ts b/packages/frontend/src/boot/common.ts
index 1d8e40a12d..52be3cd81d 100644
--- a/packages/frontend/src/boot/common.ts
+++ b/packages/frontend/src/boot/common.ts
@@ -21,6 +21,7 @@ import { reloadChannel } from '@/scripts/unison-reload.js';
 import { getUrlWithoutLoginId } from '@/scripts/login-id.js';
 import { getAccountFromId } from '@/scripts/get-account-from-id.js';
 import { deckStore } from '@/ui/deck/deck-store.js';
+import { analytics, initAnalytics } from '@/analytics.js';
 import { miLocalStorage } from '@/local-storage.js';
 import { fetchCustomEmojis } from '@/custom-emojis.js';
 import { setupRouter } from '@/router/main.js';
@@ -241,6 +242,14 @@ export async function common(createVue: () => App<Element>) {
 		await fetchCustomEmojis();
 	} catch (err) { /* empty */ }
 
+	await fetchInstanceMetaPromise;
+
+	await initAnalytics(instance);
+
+	if ($i) {
+		analytics.identify($i.id);
+	}
+
 	const app = createVue();
 
 	setupRouter(app, createMainRouter);