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var isObject = require('is-object');
// validate inputs, convert types and apply defaults
function sanitize( req ){
var clean = req.clean || {};
var params= req.query;
// ensure the input params are a valid object
if( !isObject( params ) ){
params = {};
}
// default case (no categories specified in GET params)
if('string' !== typeof params.categories || !params.categories.length){
clean.categories = [];
}
else {
// parse GET params
clean.categories = params.categories.split(',')
.map(function (cat) {
return cat.toLowerCase().trim(); // lowercase inputs
})
.filter( function( cat ) {
return ( cat.length > 0 );
});
}
// pass validated params to next middleware
req.clean = clean;
return { 'error': false };
}
// export function
module.exports = sanitize;