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/**
* @fileoverview Disallow unused placeholders in rule report messages
* @author 薛定谔的猫<hh_2013@foxmail.com>
*/
'use strict';
const utils = require('../utils');
// ------------------------------------------------------------------------------
// Rule Definition
// ------------------------------------------------------------------------------
module.exports = {
meta: {
docs: {
description: 'disallow unused placeholders in rule report messages',
category: 'Rules',
recommended: true,
},
type: 'problem',
fixable: null,
schema: [],
},
create (context) {
let contextIdentifiers;
// ----------------------------------------------------------------------
// Public
// ----------------------------------------------------------------------
return {
Program (ast) {
contextIdentifiers = utils.getContextIdentifiers(context, ast);
},
CallExpression (node) {
if (
node.callee.type === 'MemberExpression' &&
contextIdentifiers.has(node.callee.object) &&
node.callee.property.type === 'Identifier' && node.callee.property.name === 'report'
) {
const reportInfo = utils.getReportInfo(node.arguments);
if (
reportInfo &&
reportInfo.message &&
reportInfo.message.type === 'Literal' &&
typeof reportInfo.message.value === 'string' &&
reportInfo.data && reportInfo.data.type === 'ObjectExpression'
) {
const message = reportInfo.message.value;
// https://github.com/eslint/eslint/blob/2874d75ed8decf363006db25aac2d5f8991bd969/lib/linter.js#L986
const PLACEHOLDER_MATCHER = /\{\{\s*([^{}]+?)\s*\}\}/g;
const placeholdersInMessage = new Set();
message.replace(PLACEHOLDER_MATCHER, (fullMatch, term) => {
placeholdersInMessage.add(term);
});
reportInfo.data.properties.forEach(prop => {
const key = utils.getKeyName(prop);
if (!placeholdersInMessage.has(key)) {
context.report({
node: reportInfo.message,
message: 'The placeholder {{{{unusedKey}}}} is unused.',
data: { unusedKey: key },
});
}
});
}
}
},
};
},
};
|
