A tools helps to generate ID based on template or format given. Usually by adding year / month / date in it and random number. And also to generate sequential number divided by yearly / month / date.

Installation

$ npm i --save @fendy3002/id-generate

Generate by format

import {generate} from '@fendy3002/id-generate';

let id = await generate("INV/{{_date('YYYY/MM')}}/{{_randomNumber(6)}}");
// id = INV/2000/03/193820

Generate accept nunjucks format as first parameter. The generate function also add some helpers that can be used by nunjucks started with underscore:

• _date: accept moment date format. It will return today's local date. ex: date('YYYY/MM/DD')
• _randomNumber: accept number, length of characters. ex: _randomNumber(8) for 8-characters
• _uuid: accept nothing. It will return randomly generated uuid

Additional parameters

Additional parameter can be used as id generation, by injecting it as second parameter. For example:

import {generate} from '@fendy3002/id-generate';

let id = await generate("INV/{{tag}}/{{_date('YYYY/MM')}}/{{_randomNumber(6)}}". {tag: "CUST"});
// id = INV/CUST/2000/03/193820

Generate partial

Useful for generating sequential id that can be divided by year / month / date / anything desired.

import {partialGenerate} from '@fendy3002/id-generate';

let id = await partialGenerate(
    "INV/{{tag}}/{{_date('YYYY/MM')}}/{{_id(4)}}/X993", 
    async (payload) => {
        // get from database based on format, or anything by desire

        return 7; // return next id / to be inserted id
    }, {
        data: {
            tag: "CUST"
        }
    });
// id = INV/CUST/2000/03/0007/X993

• First parameter is nunjucks format. It also has access to _date and _randomNumber.
• Second parameter is next id handler. It accept a id format information and expect next (new id) to be generated as return
• Third optional parameter is option. The data property will be used as additional data to be rendered.

New id handle parameter

The payload passed into second argument (handler) has properties of:

• prefix : characters before id
• suffix : characters after id
• regex : usable regex syntax
• sql : usable sql like wildcard syntax

For example, if the format is INV/{{tag}}/{{_date('YYYY/MM')}}/{{_id(4)}}/X993, the payload is:

• prefix : INV/CUST/2019/10/
• suffix : /X993
• regex : INV/CUST/2019/10/(\d*)/X993
• sql : INV/CUST/2019/10/%/X993