Modularized Sub-Store

backend/src/utils/gist.js

@@ -0,0 +1,75 @@
+const { HTTP } = require('./open-api');
+
+/**
+ * Gist backup
+ */
+function Gist({ token, key }) {
+	const http = HTTP({
+		baseURL: 'https://api.github.com',
+		headers: {
+			Authorization: `token ${token}`,
+			'User-Agent':
+				'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.141 Safari/537.36'
+		},
+		events: {
+			onResponse: (resp) => {
+				if (/^[45]/.test(String(resp.statusCode))) {
+					return Promise.reject(`ERROR: ${JSON.parse(resp.body).message}`);
+				} else {
+					return resp;
+				}
+			}
+		}
+	});
+
+	async function locate() {
+		return http.get('/gists').then((response) => {
+			const gists = JSON.parse(response.body);
+			for (let g of gists) {
+				if (g.description === key) {
+					return g.id;
+				}
+			}
+			return -1;
+		});
+	}
+
+	this.upload = async function(files) {
+		const id = await locate();
+
+		if (id === -1) {
+			// create a new gist for backup
+			return http.post({
+				url: '/gists',
+				body: JSON.stringify({
+					description: key,
+					public: false,
+					files
+				})
+			});
+		} else {
+			// update an existing gist
+			return http.patch({
+				url: `/gists/${id}`,
+				body: JSON.stringify({ files })
+			});
+		}
+	};
+
+	this.download = async function(filename) {
+		const id = await locate();
+		if (id === -1) {
+			return Promise.reject('未找到Gist备份！');
+		} else {
+			try {
+				const { files } = await http.get(`/gists/${id}`).then((resp) => JSON.parse(resp.body));
+				const url = files[filename].raw_url;
+				return await http.get(url).then((resp) => resp.body);
+			} catch (err) {
+				return Promise.reject(err);
+			}
+		}
+	};
+}
+
+module.exports = Gist;