serial-pin-generator

A simple JavaScript script that enable developers to generate pin digits and corresponding serial numbers in application that require something like scratch card or recharge card services. it is a promise base script. Although pin and serial numbers are not each expected to be more than 25 characters long, but this script can generate up to 64 character long for each (pin or serial number).

Installation

npm install serial-pin-generator

Usage

install via npm

npm i serial-pin-generator

or via yarn

yarn add serial-pin-generator

require it in your file

const pinGen = require('serial-pin-generator');

Calling the pinGen function will return a promise which will resove with an array of objects.

pinGen()
.then(values => console.log(values))
.catch(err => console.log(err));

Syntax

pinGen([options])

The function accept object as argument. The argument is optional. it is provided to configure the output of the pin digits and the serial numbers that will be generated.

Setting the optional option argument

pinGen({
    pinLength: 5,
    serialNumLength: 15,
    prefixCharacters: 'sdp',
    numberRequired: 7,
    numberRequired: 5
}).then(values =>console.log(values))
  .catch(err => console.log(err));

is equivalent to this

pinGen({
    serialNumLength : {
        length: 15,
        includePrefixLength: true
    },
    prefixCharacters: 'sdp',
    numberRequired: 7,
    pinLength: 8
})
.then(values => console.log(values))
.catch(err => console.log(err.message));

Which generates

[
  { pin: 62511243, serial_num: 'SDP9988375879270' },
  { pin: 22128956, serial_num: 'SDP9988375879271' },
  { pin: 36864087, serial_num: 'SDP9988375879272' },
  { pin: 49280942, serial_num: 'SDP9988375879273' },
  { pin: 47421936, serial_num: 'SDP9988375879274' },
  { pin: 34639053, serial_num: 'SDP9988375879275' },
  { pin: 52842289, serial_num: 'SDP9988375879276' }
]

If serialNumLength.includePrefixLength === false,

it will add prefixCharacter length to the serialNumLength.length

Example

pinGen({
    serialNumLength : {
        length: 15,
        includePrefixLength: false
    },
    prefixCharacters: 'sdp',
    numberRequired: 7,
    pinLength: 8
})
.then(values => console.log(values))
.catch(err => console.log(err.message));

Which generates

[
  { pin: 62131779, serial_num: 'SDP5434814428618890' },
  { pin: 86781427, serial_num: 'SDP5434814428618891' },
  { pin: 57071838, serial_num: 'SDP5434814428618892' },
  { pin: 42043437, serial_num: 'SDP5434814428618893' },
  { pin: 82469489, serial_num: 'SDP5434814428618894' },
  { pin: 38335381, serial_num: 'SDP5434814428618895' },
  { pin: 97639287, serial_num: 'SDP5434814428618896' }
]

Using async await

(async () => {
    try {
        const values = await pinGen({
            pinLength: 12,
            prefixCharacters: 'sdp',
            serialNumLength: 8,
            numberRequired: 3
        })
        console.log(values);
    } catch (error) {
        console.log(error);
    }
})()

Which generates

[
  { pin: 203420843675, serial_num: 'SDP40700' },
  { pin: 603474470957, serial_num: 'SDP40701' },
  { pin: 725294039567, serial_num: 'SDP40702' }
]

Configuration Options

| options keys | datatype | description | ------ | -------- | ----------- | options.pinLength | number | The number of digits the pin should have. | | options.serialNumLength | object|number | options.serialNumLength.length type number The number of characters (string length) of the serial number. options.serialNumLength.includePrefixLength type boolean if true, the serial number prefix character length will be included in the serial number total length. Otherwise the serial number total length will options.prefixCharacters length + **options.serialNumLength.length. If **options.serialNumLength is a number it will be use for **options.serialNumLength.length. | | options.prefixCharacters | string | The prefix characters of the serial number. This should be alphanumeric characters. If you did not provide this option, the serial numbers will be string of numbers only. The options.serialNumLength should be at least four characters longer than the length of the options.prefixCharacters. string | | options.numberRequired. | number | The total number of pins and corresponding serial numbers required to be generated. |

NOTE:

The options.serialNumLength should be at least four characters longer than the length of the options.prefixCharacters.

The default configuration is the equivalent of:

{
    pinLength: 12, 
    serialNumLength: {
        length: 15,
        includePrefixLength: false,
    }, 
    prefixCharacters: '', 
    numberRequired: 20
}

License

License under the ISC