165 lines
3.6 KiB
JavaScript
Executable File
165 lines
3.6 KiB
JavaScript
Executable File
import * as esprima from "esprima";
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import escodegen from "escodegen";
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import esmangle from "esmangle";
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/**
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* JavaScript operations.
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*
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* @author n1474335 [n1474335@gmail.com]
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* @copyright Crown Copyright 2016
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* @license Apache-2.0
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*
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* @namespace
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*/
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const JS = {
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/**
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* @constant
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* @default
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*/
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PARSE_LOC: false,
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/**
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* @constant
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* @default
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*/
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PARSE_RANGE: false,
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/**
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* @constant
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* @default
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*/
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PARSE_TOKENS: false,
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/**
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* @constant
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* @default
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*/
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PARSE_COMMENT: false,
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/**
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* @constant
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* @default
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*/
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PARSE_TOLERANT: false,
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/**
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* JavaScript Parser operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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runParse: function (input, args) {
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let parseLoc = args[0],
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parseRange = args[1],
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parseTokens = args[2],
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parseComment = args[3],
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parseTolerant = args[4],
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result = {},
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options = {
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loc: parseLoc,
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range: parseRange,
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tokens: parseTokens,
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comment: parseComment,
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tolerant: parseTolerant
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};
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result = esprima.parseScript(input, options);
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return JSON.stringify(result, null, 2);
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},
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/**
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* @constant
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* @default
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*/
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BEAUTIFY_INDENT: "\\t",
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/**
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* @constant
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* @default
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*/
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BEAUTIFY_QUOTES: ["Auto", "Single", "Double"],
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/**
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* @constant
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* @default
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*/
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BEAUTIFY_SEMICOLONS: true,
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/**
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* @constant
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* @default
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*/
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BEAUTIFY_COMMENT: true,
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/**
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* JavaScript Beautify operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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runBeautify: function(input, args) {
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let beautifyIndent = args[0] || JS.BEAUTIFY_INDENT,
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quotes = args[1].toLowerCase(),
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beautifySemicolons = args[2],
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beautifyComment = args[3],
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result = "",
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AST;
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try {
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AST = esprima.parseScript(input, {
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range: true,
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tokens: true,
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comment: true
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});
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const options = {
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format: {
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indent: {
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style: beautifyIndent
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},
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quotes: quotes,
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semicolons: beautifySemicolons,
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},
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comment: beautifyComment
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};
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if (options.comment)
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AST = escodegen.attachComments(AST, AST.comments, AST.tokens);
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result = escodegen.generate(AST, options);
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} catch (e) {
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// Leave original error so the user can see the detail
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throw "Unable to parse JavaScript.<br>" + e.message;
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}
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return result;
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},
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/**
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* JavaScript Minify operation.
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*
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* @param {string} input
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* @param {Object[]} args
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* @returns {string}
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*/
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runMinify: function(input, args) {
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let result = "",
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AST = esprima.parseScript(input),
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optimisedAST = esmangle.optimize(AST, null),
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mangledAST = esmangle.mangle(optimisedAST);
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result = escodegen.generate(mangledAST, {
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format: {
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renumber: true,
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hexadecimal: true,
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escapeless: true,
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compact: true,
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semicolons: false,
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parentheses: false
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}
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});
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return result;
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},
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};
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export default JS;
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