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var mersenne = require('../vendor/mersenne');
var faker = require('../index');
var random = {
// returns a single random number based on a max number or range
number: function (options) {
if (typeof options === "number") {
options = {
max: options
};
}
options = options || {};
if (typeof options.min === "undefined") {
options.min = 0;
}
if (typeof options.max === "undefined") {
options.max = 1;
}
if (typeof options.precision === "undefined") {
options.precision = 1;
}
// Make the range inclusive of the max value
var max = options.max;
if (max > 0) {
max += options.precision;
}
var randomNumber = options.precision * Math.floor(
mersenne.rand(max / options.precision, options.min / options.precision));
return randomNumber;
},
// takes an array and returns a random element of the array
array_element: function (array) {
array = array || ["a", "b", "c"];
var r = faker.random.number({ max: array.length - 1 });
return array[r];
},
// takes an object and returns the randomly key or value
object_element: function (object, field) {
object = object || {};
var array = Object.keys(object);
var key = faker.random.array_element(array);
return field === "key" ? key : object[key];
},
uuid : function () {
var RFC4122_TEMPLATE = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx';
var replacePlaceholders = function (placeholder) {
var random = Math.random()*16|0;
var value = placeholder == 'x' ? random : (random &0x3 | 0x8);
return value.toString(16);
};
return RFC4122_TEMPLATE.replace(/[xy]/g, replacePlaceholders);
}
};
module.exports = random;
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