74 lines
1.7 KiB
JavaScript
74 lines
1.7 KiB
JavaScript
// This is a copy of https://github.com/pd4d10/userscript-meta/blob/master/index.js
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"use strict";
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function isUndefined(val) {
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return typeof val === "undefined";
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}
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function isObject(val) {
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return typeof val === "object" && val !== null;
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}
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// Parse metadata to an object
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function parse(meta) {
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if (typeof meta !== "string") {
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throw new Error("`Parse`'s first argument should be a string");
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}
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return meta
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.split(/[\r\n]/)
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.filter(function (line) {
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// remove blank line
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return (
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/\S+/.test(line) &&
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line.indexOf("==UserScript==") === -1 &&
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line.indexOf("==/UserScript==") === -1
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);
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})
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.reduce(function (obj, line) {
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var arr = line.trim().replace(/^\/\//, "").trim().split(/\s+/);
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var key = arr[0].slice(1);
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var value = arr.slice(1).join(" ");
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if (isUndefined(obj[key])) {
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obj[key] = value;
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} else if (Array.isArray(obj[key])) {
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obj[key].push(value);
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} else {
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obj[key] = [obj[key], value];
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}
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return obj;
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}, {});
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}
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function getLine(key, value) {
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// For field which has multiple values, like `match`
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if (Array.isArray(value)) {
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return value
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.map(function (value) {
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return getLine(key, value);
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})
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.join("");
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}
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return "// @" + key + " " + value + "\n";
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}
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// Stringify metadata from an object
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function stringify(obj) {
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if (!isObject(obj)) {
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throw new Error("`Stringify`'s first argument should be an object");
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}
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var meta = Object.keys(obj)
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.map(function (key) {
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return getLine(key, obj[key]);
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})
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.join("");
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return "// ==UserScript==\n" + meta + "// ==/UserScript==\n";
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}
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exports.parse = parse;
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exports.stringify = stringify;
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