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var mersenne = require('../vendor/mersenne');
function Random (faker, seed) {
// Use a user provided seed if it exists
if (seed) {
if (Array.isArray(seed) && seed.length) {
mersenne.seed_array(seed);
}
else {
mersenne.seed(seed);
}
}
// returns a single random number based on a max number or range
this.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 = 99999;
}
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
this.arrayElement = 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
this.objectElement = function (object, field) {
object = object || { "foo": "bar", "too": "car" };
var array = Object.keys(object);
var key = faker.random.arrayElement(array);
return field === "key" ? key : object[key];
}
this.uuid = function () {
var self = this;
var RFC4122_TEMPLATE = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx';
var replacePlaceholders = function (placeholder) {
var random = self.number({ min: 0, max: 15 });
var value = placeholder == 'x' ? random : (random &0x3 | 0x8);
return value.toString(16);
};
return RFC4122_TEMPLATE.replace(/[xy]/g, replacePlaceholders);
}
this.boolean = function () {
return !!faker.random.number(1)
}
// TODO: have ability to return specific type of word? As in: noun, adjective, verb, etc
this.word = function randomWord (type) {
var wordMethods = [
'commerce.department',
'commerce.productName',
'commerce.productAdjective',
'commerce.productMaterial',
'commerce.product',
'commerce.color',
'company.catchPhraseAdjective',
'company.catchPhraseDescriptor',
'company.catchPhraseNoun',
'company.bsAdjective',
'company.bsBuzz',
'company.bsNoun',
'address.streetSuffix',
'address.county',
'address.country',
'address.state',
'finance.accountName',
'finance.transactionType',
'finance.currencyName',
'hacker.noun',
'hacker.verb',
'hacker.adjective',
'hacker.ingverb',
'hacker.abbreviation',
'name.jobDescriptor',
'name.jobArea',
'name.jobType'];
// randomly pick from the many faker methods that can generate words
var randomWordMethod = faker.random.arrayElement(wordMethods);
return faker.fake('{{' + randomWordMethod + '}}');
}
this.words = function randomWords (count) {
var words = [];
if (typeof count === "undefined") {
count = faker.random.number({min:1, max: 3});
}
for (var i = 0; i<count; i++) {
words.push(faker.random.word());
}
return words.join(' ');
}
this.image = function randomImage () {
return faker.image.image();
}
return this;
}
module['exports'] = Random;
// module.exports = random;
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