/**
 * Validate required fields.
 *
 * @param {Object} requiredFields
 * @param {Object} data
 *
 * @throws {MissingFieldError}
 * @throws {InvalidFieldTypeError}
 *
 * @returns {Boolean}
 */
exports.validateRequiredFields = function( requiredFields, data ) {
    for ( var field in requiredFields ) {
        if ( !data.hasOwnProperty(field) ) {
            throw new MissingFieldError('No ' + field + ' provided');
            return false;
        }

        if ( typeof data[field] !== requiredFields[field] ) {
            throw new InvalidFieldTypeError(field + ' provided is not correct type [' + requiredFields[field] + ']');
            return false;
        }
    }
    return true;
}

function MissingFieldError(message) {
    this.name = "MissingFieldError";
    this.message = (message || "");
}
MissingFieldError.prototype = Error.prototype;

function InvalidFieldTypeError(message) {
    this.name = "InvalidFieldTypeError";
    this.message = (message || "");
}
InvalidFieldTypeError.prototype = Error.prototype;