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