☰

GreasyForkScriptUpdate

Check update for Greasyfork userscript

Fra og med 27.08.2021. Se den nyeste version.

Dette script bør ikke installeres direkte. Det er et bibliotek, som andre scripts kan inkludere med metadirektivet // @require https://update.greatest.deepsurf.us/scripts/431490/964610/GreasyForkScriptUpdate.js 

/* eslint-disable no-multi-spaces */
// ==UserScript==
// @name         GreasyForkScriptUpdate
// @namespace    GreasyForkScriptUpdate
// @version      0.3
// @description  Check update for Greasyfork userscript
// @author       PY-DNG
// @include      http*://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @grant        GM_xmlhttpRequest
// @grant        unsafeWindow
// ==/UserScript==
(function () {
	'use strict';

	// Accessable in Global_Scope
	typeof(unsafeWindow) !== 'object' && (window.unsafeWindow = window);
	unsafeWindow.GreasyForkUpdater = GreasyForkUpdater;

	// Use 'new' keyword
	function GreasyForkUpdater() {
		const GFU = this;

		// Parse '// ==UserScript==\n...\n// ==/UserScript==' to {name: '', namespace: '', version: '', ...}
		// Returns metaData object directly
		GFU.parseMetaData = function(metaText) {
			const metaData = {};
			const lines = metaText.split('\n');
			const edgeMatcher     = /==\/?UserScript==/i;
			const keyValueMatcher = /^\/\/ *@([^@ ]+) +(.+) *$/;
			const keyOnlyMatcher  = /^\/\/ *@([^@ ]+) *$/;
			for (let line of lines) {
				// Get & validate line
				line = line.trim();
				if (line.match(edgeMatcher)) {continue;};
				if (!line.match(keyValueMatcher) && !line.match(keyOnlyMatcher)) {continue;};

				// Get key-value
				const match = line.match(keyValueMatcher) ? line.match(keyValueMatcher) : line.match(keyOnlyMatcher);
				const key = match[1];
				const value = match[2] ? match[2] : true;

				// Attach to metaData object
				if (!metaData[key]) {
					metaData[key] = value;
				} else {
					if (metaData[key] instanceof Array) {
						metaData[key].push(value);
					} else {
						metaData[key] = [metaData[key], value];
					}
				}
			}
			return metaData;
		}

		// Request latest script meta text from greasyfork
		// You'll get metaText string as the first argument in your callback function
		GFU.requestMetaText = function(scriptID, callback, args=[]) {
			if (!scriptID) {return false;};
			const url = 'https://greatest.deepsurf.us/scripts/{SID}/code/script.meta.js'.replace('{SID}', String(scriptID));
			GM_xmlhttpRequest({
				method: 'GET',
				url: url,
				responseType: 'text',
				onload: function(e) {
					callback && callback.apply(null, [e.responseText].concat(args));
				}
			})
		}

		// Request & parse latest script meta data from greasyfork
		// You'll get metaData object as the first argument in your callback function
		GFU.getMetaData = function(scriptID, callback, args=[]) {
			if (!scriptID) {return false;};
			GFU.requestMetaText(scriptID, function(metaText) {
				const metaData = GFU.parseMetaData(metaText);
				callback && callback.apply(null, [metaData].concat(args));
			})
		}

		// Compare two version texts(v1, v2), returns true if v1 > v2
		// Returns null while version text contains Non-demical text period(s)
		GFU.versionNewer = function(v1, v2) {
			v1 = v1.trim().split('.');
			v2 = v2.trim().split('.');

			for (let i = 0; i < Math.min(v1.length, v2.length); i++) {
				v1[i] = Number(v1[i]);
				v2[i] = Number(v2[i]);
				if (!v1[i] || !v2[i]) {return null;};
				if (v1[i] !== v2[i]) {return v1[i] > v2[i];};
			}

			return v1.length > v2.length;
		}

		// Check if there's new version of the script on GreasyFork using scriptID, current version text
		// You'll get update(bool), updateurl(string), metaData(object) as the first, second and third argument in your callback function
		GFU.checkUpdate = function(scriptID, curver, callback, args=[]) {
			if (!scriptID) {return false;};
			GFU.getMetaData(scriptID, function(metaData) {
				const update = GFU.versionNewer(metaData.version, curver);
				const updateurl = 'https://greatest.deepsurf.us/scripts/{SID}/code/script.user.js'.replace('{SID}', String(scriptID));
				callback && callback.apply(null, [update, updateurl, metaData].concat(args));
			})
		}

		// Check & Install update automatically
		GFU.update = function(scriptID, curver) {
			GFU.checkUpdate(scriptID, curver, function() {
				const url = 'https://greatest.deepsurf.us/scripts/{SID}/code/script.user.js'.replace('{SID}', String(scriptID));
				location.href = url;
			})
		}
	}
})();