1 files changed, 105 insertions, 0 deletions
diff --git a/packages/backend/src/server/web/HtmlTemplateService.ts b/packages/backend/src/server/web/HtmlTemplateService.ts
new file mode 100644
index 0000000000..80c767d886
--- /dev/null
+++ b/packages/backend/src/server/web/HtmlTemplateService.ts
@@ -0,0 +1,105 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { dirname } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { promises as fsp } from 'node:fs';
+import { languages } from 'i18n';
+import { Injectable, Inject } from '@nestjs/common';
+import { DI } from '@/di-symbols.js';
+import { bindThis } from '@/decorators.js';
+import { htmlSafeJsonStringify } from '@/misc/json-stringify-html-safe.js';
+import { MetaEntityService } from '@/core/entities/MetaEntityService.js';
+import type { FastifyReply } from 'fastify';
+import type { Config } from '@/config.js';
+import type { MiMeta } from '@/models/Meta.js';
+import type { CommonData } from './views/_.js';
+
+const _filename = fileURLToPath(import.meta.url);
+const _dirname = dirname(_filename);
+
+const frontendVitePublic = `${_dirname}/../../../../frontend/public/`;
+const frontendEmbedVitePublic = `${_dirname}/../../../../frontend-embed/public/`;
+
+@Injectable()
+export class HtmlTemplateService {
+	private frontendBootloadersFetched = false;
+	public frontendBootloaderJs: string | null = null;
+	public frontendBootloaderCss: string | null = null;
+	public frontendEmbedBootloaderJs: string | null = null;
+	public frontendEmbedBootloaderCss: string | null = null;
+
+	constructor(
+		@Inject(DI.config)
+		private config: Config,
+
+		@Inject(DI.meta)
+		private meta: MiMeta,
+
+		private metaEntityService: MetaEntityService,
+	) {
+	}
+
+	@bindThis
+	private async prepareFrontendBootloaders() {
+		if (this.frontendBootloadersFetched) return;
+		this.frontendBootloadersFetched = true;
+
+		const [bootJs, bootCss, embedBootJs, embedBootCss] = await Promise.all([
+			fsp.readFile(`${frontendVitePublic}loader/boot.js`, 'utf-8').catch(() => null),
+			fsp.readFile(`${frontendVitePublic}loader/style.css`, 'utf-8').catch(() => null),
+			fsp.readFile(`${frontendEmbedVitePublic}loader/boot.js`, 'utf-8').catch(() => null),
+			fsp.readFile(`${frontendEmbedVitePublic}loader/style.css`, 'utf-8').catch(() => null),
+		]);
+
+		if (bootJs != null) {
+			this.frontendBootloaderJs = bootJs;
+		}
+
+		if (bootCss != null) {
+			this.frontendBootloaderCss = bootCss;
+		}
+
+		if (embedBootJs != null) {
+			this.frontendEmbedBootloaderJs = embedBootJs;
+		}
+
+		if (embedBootCss != null) {
+			this.frontendEmbedBootloaderCss = embedBootCss;
+		}
+	}
+
+	@bindThis
+	public async getCommonData(): Promise<CommonData> {
+		await this.prepareFrontendBootloaders();
+
+		return {
+			version: this.config.version,
+			config: this.config,
+			langs: [...languages],
+			instanceName: this.meta.name ?? 'Misskey',
+			icon: this.meta.iconUrl,
+			appleTouchIcon: this.meta.app512IconUrl,
+			themeColor: this.meta.themeColor,
+			serverErrorImageUrl: this.meta.serverErrorImageUrl ?? 'https://xn--931a.moe/assets/error.jpg',
+			infoImageUrl: this.meta.infoImageUrl ?? 'https://xn--931a.moe/assets/info.jpg',
+			notFoundImageUrl: this.meta.notFoundImageUrl ?? 'https://xn--931a.moe/assets/not-found.jpg',
+			instanceUrl: this.config.url,
+			metaJson: htmlSafeJsonStringify(await this.metaEntityService.packDetailed(this.meta)),
+			now: Date.now(),
+			federationEnabled: this.meta.federation !== 'none',
+			frontendBootloaderJs: this.frontendBootloaderJs,
+			frontendBootloaderCss: this.frontendBootloaderCss,
+			frontendEmbedBootloaderJs: this.frontendEmbedBootloaderJs,
+			frontendEmbedBootloaderCss: this.frontendEmbedBootloaderCss,
+		};
+	}
+
+	public static async replyHtml(reply: FastifyReply, html: string | Promise<string>) {
+		reply.header('Content-Type', 'text/html; charset=utf-8');
+		const _html = await html;
+		return reply.send(_html);
+	}
+}