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import lfib from '../vendor/lfib.js';
import * as constants from '../constants.js';
export class Random {
constructor(pure, seed) {
this.pure = pure;
this.seed = seed;
this.num = this.seed || new Date().getTime() % 1000000000;
// Preserve past behavior and fall back to the default time-based seed if an
// empty array is passed.
if (Array.isArray(this.num) && !this.num.length) {
this.num = new Date().getTime() % 1000000000;
}
this.lfibGen = lfib(this.num);
}
number(options = {}) {
const def = typeof options === 'number' ? { max: options } : options;
if (typeof def.max === 'undefined') {
def.max = 99999;
}
if (typeof def.min === 'undefined') {
def.min = def.max < 0 ? -99999 : 0;
}
if (typeof def.precision === 'undefined') {
def.precision = 0;
}
if (def.precision > 10) {
def.precision = 10;
} else if (def.precision < 0) {
def.precision = 1;
}
let result = '';
const randomNumber = Math.round(this.lfibGen() * (def.max - def.min) + def.min);
if (def.min === def.max) {
result = def.max;
} else if (def.precision >= 1) {
const template = this.pure.helpers.repeatString({ string: '#', num: def.precision });
result = parseFloat(
`${randomNumber}.${this.pure.helpers.replaceSymbolWithNumber({ string: template })}`
);
if (result > def.max) {
result = def.max;
} else if (result < def.min) {
result = def.min;
}
} else {
result = randomNumber;
}
return result;
}
float(options = {}) {
let def = options;
if (typeof def === 'number') {
def = {
precision: def
};
}
def.precision = def.precision || 1;
return this.pure.random.number(def);
}
arrayElement(array = ['a', 'b', 'c']) {
const number = this.pure.random.number({ max: array.length });
return array[number] ? array[number] : array[0];
}
arrayElements(array = ['a', 'b', 'c'], count) {
let value = count;
if (typeof value !== 'number') {
value = this.pure.random.number({ min: 1, max: array.length });
} else if (value > array.length) {
value = array.length;
} else if (value < 0) {
value = 0;
}
const arrayCopy = array.slice();
const countToRemove = arrayCopy.length - value;
for (let i = 0; i < countToRemove; i += 1) {
const indexToRemove = this.number({ max: arrayCopy.length - 1 });
arrayCopy.splice(indexToRemove, 1);
}
return arrayCopy;
}
objectElement(object = { foo: 'bar', too: 'car' }, field) {
const array = Object.keys(object);
const key = this.pure.random.arrayElement(array);
return field === 'key' ? key : object[key];
}
generateObj(length = 2) {
const obj = {};
while (Object.keys(obj).length < length) {
obj[this.word()] = this.pure.random.word();
}
return obj;
}
uuid(version = 'v1', opts = {}) {
let generated = '';
let def = opts;
if (version === 'v4') {
generated = uuid.v4();
} else if (version === 'v5') {
if (typeof opts.name === 'undefined' || typeof opts.namespace === 'undefined') {
def = {
name: 'uuid',
namespace: uuid.v1()
};
}
generated = uuid.v5(def.name, def.namespace);
} else {
generated = uuid.v1();
}
return generated;
}
boolean() {
return !!this.pure.random.number(1);
}
word() {
// regex statement used to remove unwanted characters from beginning/end of words
const wordSanitizerRegex = /^[\s()[\]{}.,\-'"]+|[\s()[\]{}.,\-'"]+$/g;
const wordMethods = [
'commerce.department',
'commerce.productName',
'commerce.productAdjective',
'commerce.productMaterial',
'commerce.product',
'commerce.color',
'company.catchPhraseAdjective',
'company.catchPhraseDescriptor',
'company.catchPhraseNoun',
'company.bsAdjective',
'company.bsBuzz',
'company.bsNoun',
'address.streetSuffix',
'address.county',
'address.country',
'address.state',
'finance.accountName',
'finance.transactionType',
'finance.currencyName',
'hacker.noun',
'hacker.verb',
'hacker.adjective',
'hacker.ingverb',
'hacker.abbreviation',
'name.jobDescriptor',
'name.jobArea',
'name.jobType'
];
// randomly pick from the many pure methods that can generate words
const randomWordMethod = this.pure.random.arrayElement(wordMethods);
let result = this.pure.fake.parse(`{{${randomWordMethod}}}`);
result = this.pure.random.arrayElement(result.split(' '));
return result.replace(wordSanitizerRegex, '');
}
words(count) {
const def = count || this.pure.random.number({ min: 1, max: 3 });
const words = [];
for (let i = 0; i < def; i += 1) {
words.push(this.pure.random.word());
}
return words.join(' ');
}
locale() {
return this.pure.random.arrayElement(this.pure.possibleLocales);
}
alpha(options) {
let def = options;
if (typeof def === 'undefined') {
def = {
count: 1
};
} else if (typeof def === 'number') {
def = {
count: def
};
} else if (typeof def.count === 'undefined') {
def.count = 1;
}
if (typeof def.upcase === 'undefined') {
def.upcase = false;
}
let wholeString = '';
for (let i = 0; i < def.count; i += 1) {
wholeString += this.pure.random.arrayElement(constants.lowerAlpha);
}
return def.upcase ? wholeString.toUpperCase() : wholeString;
}
alphaNumeric(count = 1) {
let wholeString = '';
for (let i = 0; i < count; i += 1) {
wholeString += this.pure.random.arrayElement(constants.alphaNum);
}
return wholeString;
}
hexaDecimal(count = 1) {
const template = this.pure.helpers.repeatString({ string: '#', num: count });
return this.pure.helpers.replaceSymbolWithHex({ string: template });
}
returnSeed() {
return this.num;
}
}
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