/*
 * Copyright 2010-2020 Gildas Lormeau
 * contact : gildas.lormeau <at> gmail.com
 * 
 * This file is part of SingleFile.
 *
 *   The code in this file is free software: you can redistribute it and/or 
 *   modify it under the terms of the GNU Affero General Public License 
 *   (GNU AGPL) as published by the Free Software Foundation, either version 3
 *   of the License, or (at your option) any later version.
 * 
 *   The code in this file is distributed in the hope that it will be useful, 
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero 
 *   General Public License for more details.
 *
 *   As additional permission under GNU AGPL version 3 section 7, you may 
 *   distribute UNMODIFIED VERSIONS OF THIS file without the copy of the GNU 
 *   AGPL normally required by section 4, provided you include this license 
 *   notice and a URL through which recipients can access the Corresponding 
 *   Source.
 */

/* global fetch, btoa, AbortController */

export { pushGitHub };

let pendingPush;

async function pushGitHub(token, userName, repositoryName, branchName, path, content) {
	while (pendingPush) {
		await pendingPush;
	}
	const controller = new AbortController();
	pendingPush = (async () => {
		try {
			await createContent({ path, content }, controller.signal);
		} finally {
			pendingPush = null;
		}
	})();
	return {
		cancelPush: () => controller.abort(),
		pushPromise: pendingPush
	};

	async function createContent({ path, content, message = "" }, signal) {
		try {
			const response = await fetch(`https://api.github.com/repos/${userName}/${repositoryName}/contents/${path.replace(/#/g, "%23")}`, {
				method: "PUT",
				headers: new Map([
					["Authorization", `token ${token}`],
					["Accept", "application/vnd.github.v3+json"]
				]),
				body: JSON.stringify({ content: btoa(unescape(encodeURIComponent(content))), message, branch: branchName }),
				signal
			});
			const responseData = await response.json();
			if (response.status < 400) {
				return responseData;
			} else {
				throw new Error(responseData.message);
			}
		} catch (error) {
			if (error.name != "AbortError") {
				throw error;
			}
		}
	}
}