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/**
*
* @namespace faker.random
*/
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
*
* @method faker.random.number
* @param {mixed} options {min, max, precision}
*/
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 = Math.floor(
mersenne.rand(max / options.precision, options.min / options.precision));
// Workaround problem in Float point arithmetics for e.g. 6681493 / 0.01
randomNumber = randomNumber / (1 / options.precision);
return randomNumber;
}
/**
* returns a single random floating-point number based on a max number or range
*
* @method faker.random.float
* @param {mixed} options
*/
this.float = function (options) {
if (typeof options === "number") {
options = {
precision: options
};
}
options = options || {};
var opts = {};
for (var p in options) {
opts[p] = options[p];
}
if (typeof opts.precision === 'undefined') {
opts.precision = 0.01;
}
return faker.random.number(opts);
}
/**
* takes an array and returns a random element of the array
*
* @method faker.random.arrayElement
* @param {array} array
*/
this.arrayElement = function (array) {
array = array || ["a", "b", "c"];
var r = faker.random.number({ max: array.length - 1 });
return array[r];
}
/**
* takes an array and returns a subset with random elements of the array
*
* @method faker.random.arrayElements
* @param {array} array
* @param {number} count number of elements to pick
*/
this.arrayElements = function (array, count) {
array = array || ["a", "b", "c"];
if (typeof count !== 'number') {
count = faker.random.number({ min: 1, max: array.length });
} else Iif (count > array.length) {
count = array.length;
} else Iif (count < 0) {
count = 0;
}
var arrayCopy = array.slice();
var countToRemove = arrayCopy.length - count;
for (var i = 0; i < countToRemove; i++) {
var indexToRemove = faker.random.number({ max: arrayCopy.length - 1 });
arrayCopy.splice(indexToRemove, 1);
}
return arrayCopy;
}
/**
* takes an object and returns the randomly key or value
*
* @method faker.random.objectElement
* @param {object} object
* @param {mixed} field
*/
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];
}
/**
* uuid
*
* @method faker.random.uuid
*/
this.uuid = function () {
var RFC4122_TEMPLATE = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx';
var replacePlaceholders = function (placeholder) {
var random = faker.random.number({ min: 0, max: 15 });
var value = placeholder == 'x' ? random : (random &0x3 | 0x8);
return value.toString(16);
};
return RFC4122_TEMPLATE.replace(/[xy]/g, replacePlaceholders);
}
/**
* boolean
*
* @method faker.random.boolean
*/
this.boolean = function () {
return !!faker.random.number(1)
}
// TODO: have ability to return specific type of word? As in: noun, adjective, verb, etc
/**
* word
*
* @method faker.random.word
* @param {string} type
*/
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 + '}}');
}
/**
* randomWords
*
* @method faker.random.words
* @param {number} count defaults to a random value between 1 and 3
*/
this.words = function randomWords (count) {
var words = [];
Eif (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(' ');
}
/**
* locale
*
* @method faker.random.image
*/
this.image = function randomImage () {
return faker.image.image();
}
/**
* locale
*
* @method faker.random.locale
*/
this.locale = function randomLocale () {
return faker.random.arrayElement(Object.keys(faker.locales));
};
/**
* alpha. returns lower/upper alpha characters based count and upcase options
*
* @method faker.random.alpha
* @param {mixed} options // defaults to { count: 1, upcase: false }
*/
this.alpha = function alpha(options) {
if (typeof options === "undefined") {
options = {
count: 1
}
} else if (typeof options === "number") {
options = {
count: options,
}
} else if (typeof options.count === "undefined") {
options.count = 1
}
if (typeof options.upcase === "undefined") {
options.upcase = false;
}
var wholeString = "";
for(var i = 0; i < options.count; i++) {
wholeString += faker.random.arrayElement(["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]);
}
return options.upcase ? wholeString.toUpperCase() : wholeString;
};
/**
* alphaNumeric
*
* @method faker.random.alphaNumeric
* @param {number} count defaults to 1
*/
this.alphaNumeric = function alphaNumeric(count) {
if (typeof count === "undefined") {
count = 1;
}
var wholeString = "";
for(var i = 0; i < count; i++) {
wholeString += faker.random.arrayElement(["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"]);
}
return wholeString;
};
/**
* hexaDecimal
*
* @method faker.random.hexaDecimal
* @param {number} count defaults to 1
*/
this.hexaDecimal = function hexaDecimal(count) {
if (typeof count === "undefined") {
count = 1;
}
var wholeString = "";
for(var i = 0; i < count; i++) {
wholeString += faker.random.arrayElement(["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "A", "B", "C", "D", "E", "F"]);
}
return "0x"+wholeString;
};
return this;
}
module['exports'] = Random;
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