@maniascript/mslint/dist/lib/rules/no-lonely-if.js

ManiaScript linter

import {} from '../linter/rule.js';
import { BlockStatement, ConditionalStatement } from '@maniascript/parser';
export const noLonelyIf = {
    meta: {
        id: 'no-lonely-if',
        description: 'Forbid `if` statement as the only statement in an `else` block',
        recommended: true
    },
    create(context) {
        return {
            'ConditionalStatement:exit': (node) => {
                if (node instanceof ConditionalStatement) {
                    const lastBranch = node.branches[node.branches.length - 1];
                    if (lastBranch.test === undefined &&
                        lastBranch.consequent instanceof BlockStatement &&
                        lastBranch.consequent.body.length === 1 &&
                        lastBranch.consequent.body[0] instanceof ConditionalStatement) {
                        context.report(lastBranch, 'Forbidden `if` statement as the only statement in an `else` block');
                    }
                }
            }
        };
    }
};