Support for clearing a single cookie by name (#32)

* clear a single cookie

* mistakenly renamed an export function name

* indicate the clearByName is iOS only

Author: Omer Lachish-Rauchwerger

README.md

@@ -56,6 +56,13 @@ CookieManager.clearAll((err, res) => {
   console.log(res);
 });
 
+// clear a specific cookie by its name (IOS ONLY)
+CookieManager.clearByName('cookie_name', (err, res) => {
+  console.log('cookie cleared!');
+  console.log(err);
+  console.log(res);
+});
+
 ```
 
 ### Roadmap

RNCookieManagerIOS/RNCookieManagerIOS.m

@@ -55,6 +55,16 @@ @implementation RNCookieManagerIOS
     callback(@[[NSNull null]]);
 }
 
+RCT_EXPORT_METHOD(clearByName:(NSString *)name callback:(RCTResponseSenderBlock)callback) {
+    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];
+    for (NSHTTPCookie *c in cookieStorage.cookies) {
+      if ([[c name] isEqualToString:name]) {
+        [cookieStorage deleteCookie:c];
+      }
+    }
+    callback(@[[NSNull null]]);
+}
+
 // TODO: return a better formatted list of cookies per domain
 RCT_EXPORT_METHOD(getAll:(RCTResponseSenderBlock)callback) {
     NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage];

index.js

@@ -21,7 +21,8 @@ var functions = [
     'setFromResponse',
     'get',
     'getAll',
-    'clearAll'
+    'clearAll',
+    'clearByName'
 ];
 
 module.exports = {}