Advanced JS Data Validator

A JS module for data validation of complexly-structured-data.

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Readme and examples are under construction. Please check later.

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Installation:

<script type="module">
import { DataValidator } from 'https://cdn.jsdelivr.net/gh/anshu-krishna/[email protected]/src/data-validator-min.js';

// Your code goes here
</script>

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Features:

• Supported types:

  • any : Any value

  ---

  • bool : Boolean value

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  • null : Null value

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  • num : Alias to float
  • float : Real-number value
  • int : Integer value
  • unsigned : Integer value >= 0
  • hex : String containing a hex value

  ---

  • string : String value
  • base64 : String containing base64url encoded value
  • email : String containing an email address
  • json : String containing JSON value
  • timestamp : String containing a timestamp.
    eg: '2021-01-31', '01-Jan-2021', 'January 1, 2021 05:00:10 AM GMT+05:30', etc.
  • url : String containing a URL

• Multiple alternative data types can be set for a data item. eg: 'int|float|null', 'email|null', etc.

• Data-Type/Structure can be transformed to another Data-Type/Structure(s) recursively.

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Basic Example:

import { DataValidator as DV } from './data-validator.js';

const dv = (() => {
	try {
		return DV.New`
		string.split('.') => [ /* Split into three parts; */
			base64 => json => { /* Convert from base64; Parse JSON; */
				alg: string.allowed('HS256', 'HS512'), /* Test for supported algo type */
				typ: string.allowed('JWT'),
			},
			base64 => json => { /* Convert from base64; Parse JSON; */
				?exp: unsigned, /* Optional exp */
				?iat: unsigned, /* Optional iat */
				?nbf: unsigned, /* Optional nbf */
				?name: ([..2..string,].join(' ')|string), /* Name can be:
					an array with first-name and last-name
					OR
					a string containing the full-name
				*/
				...
			},
			base64 /* Convert from base64; */
		]`;
	} catch (error) {
		console.error(error);
		return null;
	}
})();

if(dv !== null) {
	{
		/*
		JWT HEAD = { "alg": "HS256", "typ": "JWT" }
		JWT PAYLOAD = { "sub": "1234567890", "name": "John Doe", "iat": 1516239022 }
		*/
		const {valid, value, error} = dv.validate(`eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6IkpvaG4gRG9lIiwiaWF0IjoxNTE2MjM5MDIyfQ.SflKxwRJSMeKKF2QT4fwpMeJf36POk6yJV_adQssw5c`);
		
		console.log('Result:\n\tValid:', valid, '\n\tValue:', value, '\n\tError:', error);
	}
	{
		/*
		JWT HEAD = { "alg": "HS256", "typ": "JWT" }
		JWT PAYLOAD = { "sub": "1234567890", "name": ["John","Doe"], "iat": 1516239022, "nbf": 1516239021, "exp": 1516239122 }
		*/
		const {valid, value, error} = dv.validate(`eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6WyJKb2huIiwiRG9lIl0sImlhdCI6MTUxNjIzOTAyMiwibmJmIjoxNTE2MjM5MDIxLCJleHAiOjE1MTYyMzkxMjJ9.obXwAnyGDz8UlzMjmo2gUVjyVj8tfkaoJanBSPErzz8`);
		
		console.log('Result:\n\tValid:', valid, '\n\tValue:', value, '\n\tError:', error);
	}
}

Output:

Result:
	Valid: true 
	Value: [{
			"alg": "HS256",
			"typ": "JWT"
		}, {
			"sub": "1234567890",
			"name": "John Doe",
			"iat": 1516239022
		},
		"IùJÇ\u0004IHÇ�(]�O�ð¤Ç��~�:N²%_Úu\u000b,Ã�"
	]
	Error: null

Result:
	Valid: true 
	Value: [{
			"alg": "HS256",
			"typ": "JWT"
		}, {
			"sub": "1234567890",
			"name": "John Doe",
			"iat": 1516239022,
			"nbf": 1516239021,
			"exp": 1516239122
		},
		"¡µð\u0002|�\u000f?\u0014�3#�� QXòV?-~F¨%©ÁHñ+Ï?"
	]
	Error: null