Sifted

Sift out your valid inputs... functionally! Sifted allows the purely compositional construction of a schema by which to verify arbitrarily shaped javascript object hierarchies with optional coercion.

Basic Usage

Create constraints using combinators and then execute them with run.

var sifted = requre('sifted'),
    C = sifted.Constraint,
    schema = C.assoc([
            C.property(C.isNumber, 'a'),
            C.property(C.anyLenArray(C.isString), 'b')
        ]),
    result = sifted.run(schema, input);
result.fold(err => console.error(err), v => console.log(v));

At this point, result will be a Validation[Array[Reason], A] which is an object conforming to the specification you might expect. The A type will match the ideal structure of your input including none of the superfluous fields. Each Reason in the output type is a Context indicating the location in the input an error occurred and an associated error message. There is also a sifted.runCont(c, input, cb) that exposes an api similar to Joi where cb should have the signature Array[Reason], Output -> Null. Note that if validation fails, the callback receives null for output.

For more see

• The Constraint API
• The Coercion API
• The Types

These are exported from sifted as

{
    Constraint,
    Coercion,
    Types
    run,
    runCont
}