eslint-plugin-sonarjs/cjs/S6443/rule.js

SonarJS rules for ESLint

"use strict";
/*
 * SonarQube JavaScript Plugin
 * Copyright (C) 2011-2025 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Sonar Source-Available License Version 1, as published by SonarSource SA.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the Sonar Source-Available License for more details.
 *
 * You should have received a copy of the Sonar Source-Available License
 * along with this program; if not, see https://sonarsource.com/license/ssal/
 */
// https://sonarsource.github.io/rspec/#/rspec/S6443/javascript
Object.defineProperty(exports, "__esModule", { value: true });
exports.rule = void 0;
const index_js_1 = require("../helpers/index.js");
const meta_js_1 = require("./meta.js");
const declarationSelector = [
    ':matches(',
    [
        'VariableDeclarator[init.callee.name="useState"]',
        'VariableDeclarator[init.callee.object.type="Identifier"][init.callee.property.name="useState"]',
    ].join(','),
    ')',
    '[id.type="ArrayPattern"]',
    '[id.elements.length=2]',
    '[id.elements.0.type="Identifier"]',
    '[id.elements.1.type="Identifier"]',
].join('');
const callSelector = [
    'CallExpression[callee.type="Identifier"]',
    '[arguments.length=1]',
    '[arguments.0.type="Identifier"]',
].join('');
exports.rule = {
    meta: (0, index_js_1.generateMeta)(meta_js_1.meta, {
        messages: {
            uselessSetState: 'Change the argument of this setter to not use its matching state variable',
        },
    }),
    create(context) {
        const referencesBySetterName = {};
        return {
            [declarationSelector](node) {
                if (isReactCall(context, node.init)) {
                    const { elements } = node.id;
                    const setter = elements[1].name;
                    referencesBySetterName[setter] = {
                        setter: (0, index_js_1.getVariableFromName)(context, setter, node),
                        value: (0, index_js_1.getVariableFromName)(context, elements[0].name, node),
                    };
                }
            },
            [callSelector](node) {
                const setter = (0, index_js_1.getVariableFromName)(context, node.callee.name, node);
                const value = (0, index_js_1.getVariableFromName)(context, node.arguments[0].name, node);
                const key = setter?.name;
                if (setter &&
                    value &&
                    referencesBySetterName.hasOwnProperty(key) &&
                    referencesBySetterName[key].setter === setter &&
                    referencesBySetterName[key].value === value) {
                    context.report({
                        messageId: 'uselessSetState',
                        node,
                    });
                }
            },
        };
    },
};
function isReactCall(context, callExpr) {
    const fqn = (0, index_js_1.getFullyQualifiedName)(context, callExpr);
    if (fqn) {
        const [module] = fqn.split('.');
        return module === 'react';
    }
    return false;
}