86 lines
2.2 KiB
JavaScript
86 lines
2.2 KiB
JavaScript
import {replaceTemplateElement} from './fix/index.js';
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import {isRegexLiteral, isStringLiteral, isTaggedTemplateLiteral} from './ast/index.js';
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const MESSAGE_ID_UPPERCASE = 'escape-uppercase';
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const MESSAGE_ID_LOWERCASE = 'escape-lowercase';
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const messages = {
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[MESSAGE_ID_UPPERCASE]: 'Use uppercase characters for the value of the escape sequence.',
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[MESSAGE_ID_LOWERCASE]: 'Use lowercase characters for the value of the escape sequence.',
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};
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const escapeCase = /(?<=(?:^|[^\\])(?:\\\\)*\\)(?<data>x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|u{[\dA-Fa-f]+})/g;
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const escapePatternCase = /(?<=(?:^|[^\\])(?:\\\\)*\\)(?<data>x[\dA-Fa-f]{2}|u[\dA-Fa-f]{4}|u{[\dA-Fa-f]+}|c[A-Za-z])/g;
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const getProblem = ({node, original, regex = escapeCase, lowercase, fix}) => {
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const fixed = original.replace(regex, data => data[0] + data.slice(1)[lowercase ? 'toLowerCase' : 'toUpperCase']());
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if (fixed !== original) {
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return {
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node,
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messageId: lowercase ? MESSAGE_ID_LOWERCASE : MESSAGE_ID_UPPERCASE,
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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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const lowercase = context.options[0] === 'lowercase';
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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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lowercase,
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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: escapePatternCase,
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lowercase,
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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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lowercase,
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fix: (fixer, fixed) => replaceTemplateElement(node, fixed, context, fixer),
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});
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});
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};
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const schema = [
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{
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enum: ['uppercase', 'lowercase'],
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},
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];
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/** @type {import('eslint').Rule.RuleModule} */
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const config = {
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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 or lowercase values.',
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recommended: 'unopinionated',
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},
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fixable: 'code',
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schema,
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defaultOptions: ['uppercase'],
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messages,
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},
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};
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export default config;
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