Add isCnpj (#28)

Author: henriqueleite42

.vscode/settings.json

@@ -107,6 +107,7 @@
 
 	// Spell Checker
 	"cSpell.words": [
+		"cnpj",
 		"DMYS",
 		"injectables",
 		"Luma",

CHANGELOG.md

@@ -13,6 +13,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Removed
 
+## [1.6.0] - 2021-11-03
+
+### Added
+
+- `isCnpj`
+- `isMaskedCnpj`
+
+### Changed
+
+### Removed
+
 ## [1.5.0] - 2021-10-27
 
 ### Added

README.md

@@ -78,6 +78,7 @@ npm i @techmmunity/utils
 | -------------------- | ----------------------------------------------------------------- |
 | `isBetween`          | Return true if value is a number between 2 values                 |
 | `isBrazilianPhone`   | Return true if value is a brazilian phone                         |
+| `isCnpj`             | Return true if value is a CNPJ                                    |
 | `isCpf`              | Return true if value is a CPF                                     |
 | `isDarkHexColor`     | Return true if value is a dark hex color                          |
 | `isDate`             | Return true if value is a valid date in the specified format      |
@@ -102,6 +103,7 @@ npm i @techmmunity/utils
 | `isIsoDate`          | Return true if value is a ISO Date                                |
 | `isLeap`             | Return true if value is a leap year                               |
 | `isLightHexColor`    | Return true if value is a light hex color                         |
+| `isMaskedCnpj`       | Return true if value is a masked CNPJ                             |
 | `isMaskedCpf`        | Return true if value is a masked CPF                              |
 | `isNumeric`          | Return true if value is a numeric string                          |
 | `isOdd`              | Return true if value is a odd number                              |

jest.config.js

@@ -21,10 +21,10 @@ module.exports = {
 	testTimeout: 15000,
 	coverageThreshold: {
 		global: {
-			statements: 99.17,
-			branches: 98.14,
+			statements: 99.04,
+			branches: 97.86,
 			functions: 100,
-			lines: 99.64,
+			lines: 99.68,
 		},
 	},
 };

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "@techmmunity/utils",
-	"version": "1.5.0",
+	"version": "1.6.0",
 	"main": "index.js",
 	"types": "index.d.ts",
 	"license": "Apache-2.0",

src/index.ts

@@ -46,6 +46,7 @@ export * from "./lib/has-url";
 
 export * from "./lib/is-between";
 export * from "./lib/is-brazilian-phone";
+export * from "./lib/is-cnpj";
 export * from "./lib/is-cpf";
 export * from "./lib/is-dark-hex-color";
 export * from "./lib/is-date";
@@ -68,6 +69,10 @@ export * from "./lib/is-int";
 export * from "./lib/is-ipv4";
 export * from "./lib/is-ipv4-with-mask";
 export * from "./lib/is-iso-date";
+export * from "./lib/is-leap";
+export * from "./lib/is-light-hex-color";
+export * from "./lib/is-masked-cnpj";
+export * from "./lib/is-masked-cpf";
 export * from "./lib/is-numeric";
 export * from "./lib/is-odd";
 export * from "./lib/is-package-installed";

src/lib/is-cnpj/index.ts

@@ -0,0 +1,76 @@
+/* eslint-disable @typescript-eslint/no-magic-numbers */
+
+import { getTypeof } from "../get-typeof";
+
+/*
+ * CPF validation according to Receita Federal
+ * More info: https://www.geradorcnpj.com/algoritmo_do_cnpj.htm
+ */
+
+const notCnpj = [
+	"00000000000000",
+	"11111111111111",
+	"22222222222222",
+	"33333333333333",
+	"44444444444444",
+	"55555555555555",
+	"66666666666666",
+	"77777777777777",
+	"88888888888888",
+	"99999999999999",
+];
+
+/**
+ * Check if a string is a valid cpf
+ * - 55357314047
+ */
+export const isCnpj = (cnpj: string) => {
+	if (getTypeof(cnpj) !== "string") return false;
+
+	if (cnpj === "") return false;
+
+	if (cnpj.length !== 14) return false;
+
+	if (notCnpj.includes(cnpj)) return false;
+
+	let length = cnpj.length - 2;
+	let numbers = cnpj.substring(0, length);
+	const digits = cnpj.substring(length);
+	let sum = 0;
+	let pos = length - 7;
+
+	for (let i = length; i >= 1; i--) {
+		const nbr = parseInt(numbers.charAt(length - i), 10);
+
+		sum += nbr * pos--;
+
+		if (pos < 2) pos = 9;
+	}
+
+	let result = sum % 11 < 2 ? 0 : 11 - (sum % 11);
+
+	const firstChar = parseInt(digits.charAt(0), 10);
+
+	if (result !== firstChar) return false;
+
+	length += 1;
+	numbers = cnpj.substring(0, length);
+	sum = 0;
+	pos = length - 7;
+
+	for (let i = length; i >= 1; i--) {
+		const nbr = parseInt(numbers.charAt(length - i), 10);
+
+		sum += nbr * pos--;
+
+		if (pos < 2) pos = 9;
+	}
+
+	result = sum % 11 < 2 ? 0 : 11 - (sum % 11);
+
+	const secondChar = parseInt(digits.charAt(1), 10);
+
+	if (result !== secondChar) return false;
+
+	return true;
+};

src/lib/is-cpf/index.ts

@@ -27,6 +27,8 @@ const notCpf = [
 export const isCpf = (cpf: string) => {
 	if (getTypeof(cpf) !== "string") return false;
 
+	if (cpf === "") return false;
+
 	let temp: string;
 	let count: number;
 	let total: number;

src/lib/is-masked-cnpj/index.ts

@@ -0,0 +1,9 @@
+import { getTypeof } from "../get-typeof";
+import { isCnpj } from "../is-cnpj";
+
+const MASKED_CNPJ = /^\d{2}\.\d{3}\.\d{3}\/\d{4}-\d{2}$/;
+
+export const isMaskedCNPJ = (maskedCNPJ: string) =>
+	getTypeof(maskedCNPJ) === "string" &&
+	MASKED_CNPJ.test(maskedCNPJ) &&
+	isCnpj(maskedCNPJ.replace(/[^\d]+/g, ""));

src/lib/is-masked-cpf/index.ts

@@ -6,4 +6,4 @@ const MASKED_CPF = /^\d{3}\.\d{3}\.\d{3}-\d{2}$/;
 export const isMaskedCpf = (maskedCPF: string) =>
 	getTypeof(maskedCPF) === "string" &&
 	MASKED_CPF.test(maskedCPF) &&
-	isCpf(maskedCPF.replace(/\D/g, ""));
+	isCpf(maskedCPF.replace(/[^\d]+/g, ""));