function sanitize( req, sanitizers ){ // init an object to store clean (sanitized) input parameters if not initialized req.clean = req.clean || {}; // init errors and warnings arrays if not initialized req.errors = req.errors || []; req.warnings = req.warnings || []; // source of input parameters // (in this case from the GET querystring params) const params = req.query || {}; for (let s in sanitizers) { var sanity = sanitizers[s].sanitize( params, req.clean ); // if errors occurred then set them // on the req object. if( sanity.errors.length ){ req.errors = req.errors.concat( sanity.errors ); } // if warnings occurred then set them // on the req object. if( sanity.warnings.length ){ req.warnings = req.warnings.concat( sanity.warnings ); } } } // Adds to goodParameters every acceptable parameter passed through API call function checkParameters( req, sanitizers ) { req.warnings = req.warnings || []; // source of input parameters // (in this case from the GET querystring params) const params = req.query || {}; const goodParameters = {}; for (let s in sanitizers) { // checks if function exists if (typeof sanitizers[s].expected === 'function'){ /** expected() returns {array} ex: [{ name: 'text' }] */ for (let t in sanitizers[s].expected()) { /** {object} prop */ const prop = sanitizers[s].expected()[t]; if (prop.hasOwnProperty('name')){ // adds name of valid parameter goodParameters[prop.name] = prop.name; } } } } // If there are any unexpected parameters & goodParameters isn't empty, // add a warning message if (Object.keys(goodParameters).length !== 0) { for (let p in params) { if (!goodParameters.hasOwnProperty(p)){ req.warnings = req.warnings.concat('Invalid Parameter: ' + p); } } } } // runs both sanitize and checkParameters functions in async parallel function runAllChecks (req, sanitizers) { sanitize(req, sanitizers); checkParameters(req, sanitizers); } // export function module.exports = { sanitize: sanitize, checkParameters: checkParameters, runAllChecks: runAllChecks };