Secval NPM | npm.io

SecVal - typed argument validator primarily for Express JS Framework.

This library in beta, though is used in production projects. Main idea is to provide way to validate input arguments and return typed arguments, errors and warnings.

Example of usage:

app.post('/users', async (req, res) => {
    let [err, options] = new Validator().with(req.body)
        .arg('username').required.string.between(3, 100)
        .arg('password').required.string.min(7)
        .arg('age').optional.unsigned.int.min(13)
        .arg('currency').required.string.trim.exactly(3).toUpperCase
        .arg('gender').optional.enumeration(['male', 'female'])
        .arg('location').optional.object
            .arg('latitude').optional.float
            .arg('longitude').optional.float
        .end
        .compound.allOrNothing('location.latitude', 'location.longitude')
        .build();

    if (err) {
        res.status(400).send({ error: err });
    }
    return new UserCtrl().create(req, res, options);
});

Another one

app.post('/api/v1/offices/:ouid/profiles', loginHelper.isLoggedInAndOfficeOwner, async (req, res) => {
    const [err, options] = new Validator()
        .with(req.params)
            .arg('ouid').required.uuid.v4
        .with(req.body)
            .arg('name').required.string
            .arg('printerName').required.string
            .arg('customData').required.object.end
            .arg('price').required.float.min(0)
            .arg('settings').as('printerSettings').required.object
                .arg('isColor').required.bool
                .arg('allowDuplex').required.bool
                .arg('dpix').required.float
                .arg('dpiy').required.float
            .end
            .arg('paper').required.object
                .arg('name').required.string
                .arg('coating').optional.default('Undefined')
                    .enumeration(['Undefined', 'Gloss', 'Matte', 'Velvet', 'Linen', 'Silk'])
                .arg('width').required.unsigned.int
                .arg('height').required.unsigned.int
                .arg('printWidth').required.unsigned.int
                .arg('printHeight').required.unsigned.int
                .arg('marginTop').required.unsigned.int
                .arg('marginLeft').required.unsigned.int
        .build();
    if (err) {
        return res.sendErr(400, err);
    }
    return new ProfileCtrl().create(req, res, options);
});