eslint-plugin-sonarjs
Version:
SonarJS rules for ESLint
87 lines (86 loc) • 3.37 kB
JavaScript
;
/*
* 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/S3616/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");
exports.rule = {
meta: (0, index_js_1.generateMeta)(meta_js_1.meta, {
messages: {
specifyCase: `Explicitly specify {{nesting}} separate cases that fall through; currently this case clause only works for "{{expression}}".`,
},
}),
create(context) {
function reportIssue(node, clause, nestingLvl) {
context.report({
messageId: 'specifyCase',
data: {
nesting: nestingLvl.toString(),
expression: String(getTextFromNode(clause)),
},
node,
});
}
function getTextFromNode(node) {
if (node.type === 'Literal') {
return node.value;
}
else {
return context.sourceCode.getText(node);
}
}
return {
'SwitchCase > SequenceExpression'(node) {
const expressions = node.expressions;
reportIssue(node, expressions[expressions.length - 1], expressions.length);
},
'SwitchCase > LogicalExpression'(node) {
if (!isSwitchTrue(getEnclosingSwitchStatement(context, node))) {
const firstElemAndNesting = getFirstElementAndNestingLevel(node, 0);
if (firstElemAndNesting) {
reportIssue(node, firstElemAndNesting[0], firstElemAndNesting[1] + 1);
}
}
},
};
},
};
function getEnclosingSwitchStatement(context, node) {
const ancestors = context.sourceCode.getAncestors(node);
for (let i = ancestors.length - 1; i >= 0; i--) {
if (ancestors[i].type === 'SwitchStatement') {
return ancestors[i];
}
}
throw new Error('A switch case should have an enclosing switch statement');
}
function isSwitchTrue(node) {
return (0, index_js_1.isLiteral)(node.discriminant) && node.discriminant.value === true;
}
function getFirstElementAndNestingLevel(logicalExpression, currentLvl) {
if (logicalExpression.operator === '||') {
if (logicalExpression.left.type === 'LogicalExpression') {
return getFirstElementAndNestingLevel(logicalExpression.left, currentLvl + 1);
}
else {
return [logicalExpression.left, currentLvl + 1];
}
}
return undefined;
}