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https://github.com/kdabir/feku
Generate Intelligent Random Data
https://github.com/kdabir/feku
generator random
Last synced: 10 days ago
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Generate Intelligent Random Data
- Host: GitHub
- URL: https://github.com/kdabir/feku
- Owner: kdabir
- Created: 2022-04-06T17:19:52.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2023-12-10T06:44:25.000Z (11 months ago)
- Last Synced: 2024-08-01T19:53:35.384Z (3 months ago)
- Topics: generator, random
- Language: JavaScript
- Homepage:
- Size: 31.3 KB
- Stars: 6
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Feku
Generate intelligent random data based on a spec file.
## Features
- CLI
- examples
- helper functions to generate random data
- customizable output JSON lines (jsonld / ndjson) or JSON Array
- custom spec files to generate new rows based on previously generated data (for example account balance must take into account previous transaction as well)
## Installation
- using PNPM `pnpm add -D feku`
- using NPM `npm install --save-dev feku`
## Using as a CLI
> [!NOTE]
> When installed locally in a project using pnpm, run CLI using PNPM `pnpm feku [options]`
Options
- `--count` or `-n` accepts number of items to generate
- `--array` or `-a`
Examples:
`feku examples/movies.js` by default produces json lines (jsonld / ndjson)
```json lines
{"title":"sint voluptatem","year":2014,"rating":4,"duration":102,"genre":"Romance","image":"http://loremflickr.com/640/480/abstract","description":"Laudantium minima quae libero asperiores voluptatem adipisci. Doloribus rerum praesentium.","cast":["Shawna Pollich DVM","Miss Josefina Schmidt","Lizeth"]}
{"title":"aperiam nostrum odit excepturi sint","year":2001,"rating":2,"duration":110,"genre":"Comedy","image":"http://loremflickr.com/640/480/business","description":"Fuga quod culpa qui. Provident voluptatum qui eum omnis.","cast":["Phil Casper","Sergio Pfeffer","Yvonne"]}
{"title":"iure","year":1985,"rating":5,"duration":134,"genre":"Drama","image":"http://loremflickr.com/640/480/abstract","description":"Quia incidunt ipsum maiores. Libero similique assumenda deserunt aliquam harum iure nemo fuga consequatur.","cast":["Kristin Hintz","Dr. Danielle Batz","Mavis"]}
{"title":"aliquam","year":1989,"rating":1,"duration":113,"genre":"Comedy","image":"http://loremflickr.com/640/480/people","description":"Et omnis ipsam placeat est harum adipisci. Illum et consequatur.","cast":["Gerardo MacGyver","Miss Lester Brakus","Retha"]}
```
`feku examples/people.js --count=5 --array` produces an array of five person objects
```json
[
{
"name": "Lindsay Swaniawski",
"age": 85
},
{
"name": "Mattie Romaguera",
"age": 37
},
{
"name": "Tabitha Harber",
"age": 99
},
{
"name": "Virginia Schinner",
"age": 69
},
{
"name": "Kara Kihn",
"age": 47
}
]
```
We can pass in extra args like start and end date.
`feku examples/account.js --count 5 --startDate 2022-04-01 --endDate 2022-04-30`
```json lines
{"date":"2022-04-01","desc":"laudantium quae","amt":-8,"bal":1241}
{"date":"2022-04-02","desc":"dolorum eligendi omnis officiis qui","amt":22,"bal":1263}
{"date":"2022-04-05","desc":"rem qui incidunt et","amt":-61,"bal":1202}
{"date":"2022-04-08","desc":"libero porro","amt":-32,"bal":1170}
{"date":"2022-04-20","desc":"aut id","amt":-20,"bal":1150}
```
## Writing a spec file
At minimum, the spec file needs to export a default function (you can give it whatever name the suits it purpose, see examples)
```javascript
export default function rowBuilder({faker}) {
return {
name: faker.name.findName()
}
}
```
we can export `initialContext`, that is passed to the rowBuilder as well which can be used to control seed data.
These attributes can be overridden from the CLI as well.
```javascript
export const initialContext = {
count: 30
}
```
## Using as a Library
We can use feku to generate data on the fly in browser/node or any other javascript environment. Following is an example:
```
import { generate } from "feku";
export function generateData(n = 10) {
const data = [];
function rowBuilder({ faker }) {
return {
name: faker.name.findName(),
age: faker.datatype.number({ min: 1, max: 100 }),
city: faker.address.city(),
phone: faker.phone.phoneNumber("(+##) #### ### ###")
};
}
for (let row of generate({ count: n }, rowBuilder)) {
data.push(row);
}
return data;
}
```
## Built on libraries
- [Faker](https://www.npmjs.com/package/@faker-js/faker)
- [Chance](https://chancejs.com/)
- [date-fns](https://date-fns.org/)
### Other libraries worth checking out:
- [Fakerator](https://github.com/icebob/fakerator)
- [Json Schema Faker](https://github.com/json-schema-faker/json-schema-faker)
- [DreamJS](https://github.com/adleroliveira/dreamjs)
- [Mocker Data generator](https://github.com/danibram/mocker-data-generator/)
- [Casual](https://github.com/boo1ean/casual)