/* eslint-env node */
const errors = require('feathers-errors');
const debug = require('debug')('authManagement:checkUniqueness');
// This module is usually called from the UI to check username, email, etc. are unique.
module.exports = function checkUniqueness (options, identifyUser, ownId, meta) {
debug('checkUniqueness', identifyUser, ownId, meta);
const users = options.app.service(options.service);
const usersIdName = users.id;
const keys = Object.keys(identifyUser).filter(
key => identifyUser[key] !== undefined && identifyUser[key] !== null);
return Promise.all(
keys.map(prop => users.find({ query: { [prop]: identifyUser[prop].trim() } })
.then(data => {
const items = Array.isArray(data) ? data : data.data;
const isNotUnique = items.length > 1 ||
(items.length === 1 && items[0][usersIdName] !== ownId);
return isNotUnique ? prop : null;
})
))
.catch(err => {
throw new errors.GeneralError(err);
})
.then(allProps => {
const errProps = allProps.filter(prop => prop);
if (errProps.length) {
const errs = {};
errProps.forEach(prop => { errs[prop] = 'Already taken.'; });
throw new errors.BadRequest(meta.noErrMsg ? null : 'Values already taken.',
{ errors: errs }
);
}
return null;
});
};
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