69 lines
1.4 KiB
JavaScript
69 lines
1.4 KiB
JavaScript
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'use strict';
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const safeRegex = require('safe-regex');
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const {newExpressionSelector} = require('./selectors/index.js');
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const {isNewExpression} = require('./ast/index.js');
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const MESSAGE_ID = 'no-unsafe-regex';
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const messages = {
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[MESSAGE_ID]: 'Unsafe regular expression.',
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};
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const newRegExpSelector = [
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newExpressionSelector('RegExp'),
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'[arguments.0.type="Literal"]',
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].join('');
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/** @param {import('eslint').Rule.RuleContext} context */
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const create = () => ({
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'Literal[regex]'(node) {
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// Handle regex literal inside RegExp constructor in the other handler
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if (isNewExpression(node.parent, {name: 'RegExp'})) {
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return;
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}
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if (!safeRegex(node.value)) {
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return {
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node,
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messageId: MESSAGE_ID,
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};
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}
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},
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[newRegExpSelector](node) {
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const arguments_ = node.arguments;
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const hasRegExp = arguments_[0].regex;
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let pattern;
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let flags;
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if (hasRegExp) {
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({pattern} = arguments_[0].regex);
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flags = arguments_[1]?.type === 'Literal'
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? arguments_[1].value
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: arguments_[0].regex.flags;
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} else {
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pattern = arguments_[0].value;
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flags = arguments_[1]?.type === 'Literal'
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? arguments_[1].value
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: '';
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}
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if (!safeRegex(`/${pattern}/${flags}`)) {
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return {
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node,
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messageId: MESSAGE_ID,
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};
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}
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},
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});
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/** @type {import('eslint').Rule.RuleModule} */
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module.exports = {
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create,
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meta: {
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type: 'problem',
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docs: {
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description: 'Disallow unsafe regular expressions.',
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},
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messages,
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},
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};
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