63 lines
1.3 KiB
JavaScript
63 lines
1.3 KiB
JavaScript
'use strict';
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const safeRegex = require('safe-regex');
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const getDocumentationUrl = require('./utils/get-documentation-url');
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const message = 'Unsafe regular expression.';
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const create = context => {
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return {
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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 (
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node.parent.type === 'NewExpression' &&
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node.parent.callee.name === 'RegExp'
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) {
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return;
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}
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if (!safeRegex(node.value)) {
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context.report({
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node,
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message
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});
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}
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},
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'NewExpression[callee.name="RegExp"]': node => {
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const arguments_ = node.arguments;
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if (arguments_.length === 0 || arguments_[0].type !== 'Literal') {
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return;
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}
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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] && arguments_[1].type === 'Literal' ? arguments_[1].value : arguments_[0].regex.flags;
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} else {
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pattern = arguments_[0].value;
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flags = arguments_[1] && arguments_[1].type === 'Literal' ? arguments_[1].value : '';
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}
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if (!safeRegex(`/${pattern}/${flags}`)) {
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context.report({
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node,
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message
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});
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}
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}
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};
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};
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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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url: getDocumentationUrl(__filename)
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}
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}
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};
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