/**
 * @fileOverview  Custom keyword for ajv
 *
 * This defines a custom keyword for ajv
 */
'use strict';

module.exports = {
    keyword: 'maxDecimalPlaces',
    definition: {
        errors: false,
        async: false,
        metaSchema: {
            type: 'number',
            minimum: 0
        },
        compile: doValidate
    }
};

/**
 * Function to validate that a number passed in has less than the given
 * number of places.
 *
 * @param {any} schema          - The number of places
 * @param {Object} parentSchema - The schema
 *
 * @returns {Function}          - The function to do the compare at runtime
 */
function doValidate(schema, parentSchema) {
    var numPlaces = schema;

    return function(data) {
        var tempString = '' + data;
        var pieces = tempString.split('.');
        if (pieces.length < 2) {
            return true;
        } else {
            return pieces[1].length <= numPlaces;
        }
    };
}