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'use strict';
const assert = require('assert');
module.exports = setup;
// // //
/**
* Append a logger to the request. The logger is created with `requestId: req.requestId`
* @see middleware requestId.js
* @param {Object} logger The logger (must have a .child method)
* @return {Function} the middleware
*/
function setup(logger) {
assert.ok(logger, 'Logger is missing');
assert(
typeof logger.child === 'function',
'Logger must have a "child" method'
);
/**
* The middleware
* @param {Object} req Express request
* @param {Object} res Express response
* @param {Function} next Express next handler
* @returns {void}
*/
return function middleware(req, res, next) {
req.logger = logger.child({ requestId: req.requestId });
next();
};
}
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