schimitar/index.js

Naive schema cutter

var clone = require('clone-deep');

function arrayValidation(data, schema){
    var length = 'maxItems' in schema ? schema.maxItems : schema.items.length;

    if(!Array.isArray(data)){
        return data;
    }

    while(data.length > length){
        data.pop();
    }

    for(var i = 0; i < data.length; i++) {
        process(data[i],
            Array.isArray(schema.items) ?
            schema.items[i] :
            schema.items
        );
    }
}

function objectValidation(data, schema){
    if(!data || typeof data !== 'object'){
        return data;
    }

    for(var key in data){
        if(schema.properties){
            if(schema.additionalProperties === false && !(key in schema.properties)){
                delete data[key];
            } else {
                process(data[key], schema.properties[key]);
            }
        }
    }
}

function process(data, schema){
    if(schema){
        if(schema.type === 'array'){
            arrayValidation(data, schema);
        }

        if(schema.type === 'object'){
            objectValidation(data, schema);
        }
    }

    return data;
}

module.exports = function(data, schema){
    return process(clone(data), schema);
};