feat(contains): Added ignoreCase option

README.md

@@ -81,7 +81,7 @@ Here is a list of the validators currently available.
 
 Validator                               | Description
 --------------------------------------- | --------------------------------------
-***contains(str, seed)***               | check if the string contains the seed.
+**contains(str, seed [, options ])**    | check if the string contains the seed.<br/><br/>`options` is an object that defaults to `{ ignoreCase: false}`.<br/>`ignoreCase` specified whether the case of the substring be same or not.  
 **equals(str, comparison)**             | check if the string matches the comparison.
 **isAfter(str [, date])**               | check if the string is a date that's after the specified date (defaults to now).
 **isAlpha(str [, locale])**             | check if the string contains only letters (a-zA-Z).<br/><br/>Locale is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'el-GR', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fa-IR', 'he', 'hu-HU', 'it-IT', 'ku-IQ', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sk-SK', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`) and defaults to `en-US`. Locale list is `validator.isAlphaLocales`.

es/lib/contains.js

@@ -1,6 +1,11 @@
 import assertString from './util/assertString';
 import toString from './util/toString';
-export default function contains(str, elem) {
+import merge from './util/merge';
+var defaulContainsOptions = {
+  ignoreCase: false
+};
+export default function contains(str, elem, options) {
   assertString(str);
-  return str.indexOf(toString(elem)) >= 0;
+  options = merge(options, defaulContainsOptions);
+  return options.ignoreCase ? str.toLowerCase().indexOf(toString(elem).toLowerCase()) >= 0 : str.indexOf(toString(elem)) >= 0;
 }

lib/contains.js

@@ -9,11 +9,18 @@ var _assertString = _interopRequireDefault(require("./util/assertString"));
 
 var _toString = _interopRequireDefault(require("./util/toString"));
 
+var _merge = _interopRequireDefault(require("./util/merge"));
+
 function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
 
-function contains(str, elem) {
+var defaulContainsOptions = {
+  ignoreCase: false
+};
+
+function contains(str, elem, options) {
   (0, _assertString.default)(str);
-  return str.indexOf((0, _toString.default)(elem)) >= 0;
+  options = (0, _merge.default)(options, defaulContainsOptions);
+  return options.ignoreCase ? str.toLowerCase().indexOf((0, _toString.default)(elem).toLowerCase()) >= 0 : str.indexOf((0, _toString.default)(elem)) >= 0;
 }
 
 module.exports = exports.default;

src/lib/contains.js

@@ -1,7 +1,15 @@
 import assertString from './util/assertString';
 import toString from './util/toString';
+import merge from './util/merge';
 
-export default function contains(str, elem) {
+const defaulContainsOptions = {
+  ignoreCase: false,
+};
+
+export default function contains(str, elem, options) {
   assertString(str);
-  return str.indexOf(toString(elem)) >= 0;
+  options = merge(options, defaulContainsOptions);
+  return options.ignoreCase ?
+    str.toLowerCase().indexOf(toString(elem).toLowerCase()) >= 0 :
+    str.indexOf(toString(elem)) >= 0;
 }

test/validators.js

@@ -3520,6 +3520,15 @@ describe('Validators', () => {
       valid: ['foo', 'foobar', 'bazfoo'],
       invalid: ['bar', 'fobar'],
     });
+
+    test({
+      validator: 'contains',
+      args: ['foo', {
+        ignoreCase: true,
+      }],
+      valid: ['Foo', 'FOObar', 'BAZfoo'],
+      invalid: ['bar', 'fobar', 'baxoof'],
+    });
   });
 
   it('should validate strings against a pattern', () => {