75 lines
1.8 KiB
JavaScript
75 lines
1.8 KiB
JavaScript
'use strict';
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const {replaceTemplateElement} = require('./fix/index.js');
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const {
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isRegexLiteral,
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isStringLiteral,
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isTaggedTemplateLiteral,
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} = require('./ast/index.js');
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const MESSAGE_ID = 'escape-case';
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const messages = {
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[MESSAGE_ID]: 'Use uppercase characters for the value of the escape sequence.',
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};
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const escapeWithLowercase = /(?<=(?:^|[^\\])(?:\\\\)*\\)(?<data>x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|u{[\dA-Fa-f]+})/g;
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const escapePatternWithLowercase = /(?<=(?:^|[^\\])(?:\\\\)*\\)(?<data>x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|u{[\dA-Fa-f]+}|c[a-z])/g;
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const getProblem = ({node, original, regex = escapeWithLowercase, fix}) => {
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const fixed = original.replace(regex, data => data.slice(0, 1) + data.slice(1).toUpperCase());
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if (fixed !== original) {
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return {
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node,
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messageId: MESSAGE_ID,
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fix: fixer => fix ? fix(fixer, fixed) : fixer.replaceText(node, fixed),
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};
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}
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};
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/** @param {import('eslint').Rule.RuleContext} context */
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const create = context => {
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context.on('Literal', node => {
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if (isStringLiteral(node)) {
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return getProblem({
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node,
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original: node.raw,
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});
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}
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});
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context.on('Literal', node => {
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if (isRegexLiteral(node)) {
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return getProblem({
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node,
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original: node.raw,
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regex: escapePatternWithLowercase,
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});
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}
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});
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context.on('TemplateElement', node => {
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if (isTaggedTemplateLiteral(node.parent, ['String.raw'])) {
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return;
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}
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return getProblem({
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node,
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original: node.value.raw,
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fix: (fixer, fixed) => replaceTemplateElement(fixer, node, fixed),
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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: 'suggestion',
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docs: {
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description: 'Require escape sequences to use uppercase values.',
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recommended: true,
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},
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fixable: 'code',
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messages,
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},
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};
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