From 7e9f8baca4e307555ade863df0369e5c89cf6465 Mon Sep 17 00:00:00 2001
From: Naoto Yokoyama <builtinnya@gmail.com>
Date: Tue, 20 Feb 2018 23:18:37 +0900
Subject: [PATCH] validator: add isISSN()

---
 types/validator/index.d.ts         | 14 ++++++++++++++
 types/validator/validator-tests.ts |  8 ++++++++
 2 files changed, 22 insertions(+)

diff --git a/types/validator/index.d.ts b/types/validator/index.d.ts
index 228090f62c..0806d34f2a 100644
--- a/types/validator/index.d.ts
+++ b/types/validator/index.d.ts
@@ -113,6 +113,9 @@ declare namespace ValidatorJS {
     // check if the string is an ISBN (version 10 or 13).
     isISBN(str: string, version?: number): boolean;
 
+    // check if the string is an ISSN (https://en.wikipedia.org/wiki/International_Standard_Serial_Number).
+    isISSN(str: string, options?: IsISSNOptions): boolean;
+
     // check if the string is an ISIN (https://en.wikipedia.org/wiki/International_Securities_Identification_Number)
     // (stock/security identifier).
     isISIN(str: string): boolean;
@@ -325,6 +328,12 @@ declare namespace ValidatorJS {
     locale?: FloatLocale;
   }
 
+  // options for isISSN
+  interface IsISSNOptions {
+    case_sensitive?: boolean;
+    require_hyphen?: boolean;
+  }
+
   // options for IsInt
   interface IsIntOptions {
     min?: number;
@@ -516,6 +525,11 @@ declare module "validator/lib/isISBN" {
   export = isISBN;
 }
 
+declare module "validator/lib/isISSN" {
+  const isISSN: typeof validator.isISSN;
+  export = isISSN;
+}
+
 declare module "validator/lib/isISIN" {
   const isISIN: typeof validator.isISIN;
   export = isISIN;
diff --git a/types/validator/validator-tests.ts b/types/validator/validator-tests.ts
index 626f51671e..0aaf7f1f10 100644
--- a/types/validator/validator-tests.ts
+++ b/types/validator/validator-tests.ts
@@ -33,6 +33,7 @@ import isHexColorFunc = require('validator/lib/isHexColor');
 import isHexadecimalFunc = require('validator/lib/isHexadecimal');
 import isIPFunc = require('validator/lib/isIP');
 import isISBNFunc = require('validator/lib/isISBN');
+import isISSNFunc = require('validator/lib/isISSN');
 import isISINFunc = require('validator/lib/isISIN');
 import isISO8601Func = require('validator/lib/isISO8601');
 import isISO31661Alpha2Func = require('validator/lib/isISO31661Alpha2');
@@ -157,6 +158,9 @@ import whitelistFunc = require('validator/lib/whitelist');
   let _isISBN = validator.isISBN;
   _isISBN = isISBNFunc;
 
+  let _isISSN = validator.isISSN;
+  _isISSN = isISSNFunc;
+
   let _isISIN = validator.isISIN;
   _isISIN = isISINFunc;
 
@@ -463,6 +467,10 @@ let any: any;
   result = validator.isISBN('sample');
   result = validator.isISBN('sample', 13);
 
+  let isISSNOptions: ValidatorJS.IsISSNOptions;
+  result = validator.isISSN('sample');
+  result = validator.isISSN('sample', isISSNOptions);
+
   result = validator.isISIN('sample');
 
   result = validator.isISO8601('sample');