@nodesecure/js-x-ray/dist/utils/isOneLineExpressionExport.js

JavaScript AST XRay analysis

// Import Internal Dependencies
import { getCallExpressionIdentifier, isCallExpression, isMemberExpression } from "../estree/index.js";
export function isOneLineExpressionExport(body) {
    if (body.length === 0 || body.length > 1) {
        return false;
    }
    const [firstNode] = body;
    if (firstNode.type !== "ExpressionStatement") {
        return false;
    }
    switch (firstNode.expression.type) {
        // module.exports = require('...');
        case "AssignmentExpression":
            return exportAssignmentHasRequireLeave(firstNode.expression.right);
        // require('...');
        case "CallExpression":
            return exportAssignmentHasRequireLeave(firstNode.expression);
        default:
            return false;
    }
}
function exportAssignmentHasRequireLeave(expr) {
    if (expr.type === "LogicalExpression") {
        return atLeastOneBranchHasRequireLeave(expr.left, expr.right);
    }
    if (expr.type === "ConditionalExpression") {
        return atLeastOneBranchHasRequireLeave(expr.consequent, expr.alternate);
    }
    if (isCallExpression(expr)) {
        return getCallExpressionIdentifier(expr) === "require";
    }
    if (isMemberExpression(expr)) {
        let rootMember = expr.object;
        while (isMemberExpression(rootMember)) {
            rootMember = rootMember.object;
        }
        if (!isCallExpression(rootMember)) {
            return false;
        }
        return getCallExpressionIdentifier(rootMember) === "require";
    }
    return false;
}
function atLeastOneBranchHasRequireLeave(left, right) {
    return [
        exportAssignmentHasRequireLeave(left),
        exportAssignmentHasRequireLeave(right)
    ].some((hasRequire) => hasRequire);
}
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