74 lines
1.9 KiB
JavaScript
74 lines
1.9 KiB
JavaScript
const babelParser = require('@babel/parser');
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const parse5 = require('parse5');
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const traverseHtml = require('../utils/traverse-html.js');
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const { LogService } = require('./LogService.js');
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/**
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* @typedef {import("@babel/types").File} File
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* @typedef {import("@babel/parser").ParserOptions} ParserOptions
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* @typedef {import('../types/core').PathFromSystemRoot} PathFromSystemRoot
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*/
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class AstService {
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/**
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* Compiles an array of file paths using Babel.
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* @param {string} code
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* @param {ParserOptions} parserOptions
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* @returns {File}
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*/
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static _getBabelAst(code, parserOptions = {}) {
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const ast = babelParser.parse(code, {
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sourceType: 'module',
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plugins: [
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'importMeta',
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'dynamicImport',
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'classProperties',
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'exportDefaultFrom',
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'importAssertions',
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],
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...parserOptions,
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});
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return ast;
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}
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/**
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* Combines all script tags as if it were one js file.
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* @param {string} htmlCode
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*/
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static getScriptsFromHtml(htmlCode) {
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const ast = parse5.parseFragment(htmlCode);
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/**
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* @type {string[]}
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*/
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const scripts = [];
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traverseHtml(ast, {
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/**
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* @param {{ node: { childNodes: { value: any; }[]; }; }} path
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*/
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script(path) {
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const code = path.node.childNodes[0] ? path.node.childNodes[0].value : '';
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scripts.push(code);
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},
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});
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return scripts;
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}
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/**
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* Returns the Babel AST
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* @param { string } code
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* @param { 'babel' } astType
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* @param { {filePath?: PathFromSystemRoot} } options
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* @returns {File|undefined}
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*/
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// eslint-disable-next-line consistent-return
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static getAst(code, astType, { filePath } = {}) {
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// eslint-disable-next-line default-case
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try {
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return this._getBabelAst(code);
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} catch (e) {
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LogService.error(`Error when parsing "${filePath}":/n${e}`);
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}
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}
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}
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module.exports = { AstService };
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