refactoring

Resolve #7779

packages/backend/src/server/api/endpoints/notes/translate.ts

@@ -0,0 +1,89 @@
+import $ from 'cafy';
+import { ID } from '@/misc/cafy-id';
+import define from '../../define';
+import { getNote } from '../../common/getters';
+import { ApiError } from '../../error';
+import fetch from 'node-fetch';
+import config from '@/config/index';
+import { getAgentByUrl } from '@/misc/fetch';
+import { URLSearchParams } from 'url';
+import { fetchMeta } from '@/misc/fetch-meta';
+import { Notes } from '@/models';
+
+export const meta = {
+	tags: ['notes'],
+
+	requireCredential: false as const,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+		targetLang: {
+			validator: $.str,
+		},
+	},
+
+	res: {
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'bea9b03f-36e0-49c5-a4db-627a029f8971'
+		}
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	if (!(await Notes.isVisibleForMe(note, user ? user.id : null))) {
+		return 204; // TODO: 良い感じのエラー返す
+	}
+
+	if (note.text == null) {
+		return 204;
+	}
+
+	const instance = await fetchMeta();
+
+	if (instance.deeplAuthKey == null) {
+		return 204; // TODO: 良い感じのエラー返す
+	}
+
+	let targetLang = ps.targetLang;
+	if (targetLang.includes('-')) targetLang = targetLang.split('-')[0];
+
+	const params = new URLSearchParams();
+	params.append('auth_key', instance.deeplAuthKey);
+	params.append('text', note.text);
+	params.append('target_lang', targetLang);
+
+	const endpoint = instance.deeplIsPro ? 'https://api.deepl.com/v2/translate' : 'https://api-free.deepl.com/v2/translate';
+
+	const res = await fetch(endpoint, {
+		method: 'POST',
+		headers: {
+			'Content-Type': 'application/x-www-form-urlencoded',
+			'User-Agent': config.userAgent,
+			Accept: 'application/json, */*'
+		},
+		body: params,
+		timeout: 10000,
+		agent: getAgentByUrl,
+	});
+
+	const json = await res.json();
+
+	return {
+		sourceLang: json.translations[0].detected_source_language,
+		text: json.translations[0].text
+	};
+});