feat(ios-common-cookies): add clearAllCookies function

Hi there! 👋

This pull request adds a new feature to the iOS Common Cookies module,
allowing all cookies to be cleared from both `HTTPCookieStorage` and the
WKWebView cookie store. The most important changes include the
implementation of the new `clearAllCookies` method in both the native
Swift module and the TypeScript interface, as well as the introduction
of a new result type for this operation.

**New Feature: Cookie Clearing**

* Added a new async function `clearAllCookies` to the
`iOSCommonCookiesModule` Swift class, which clears all cookies from
`HTTPCookieStorage` and the WKWebView cookie store, and returns the
number of cookies cleared from each.
* Added the `clearAllCookies()` method to the TypeScript interface in
`iOSCommonCookies.ts`, returning a `Promise<CookieClearResult>`.
* Introduced a new `CookieClearResult` type in
`iOSCommonCookies.types.ts` to represent the result of the cookie
clearing operation, including counts for both stores.

**TypeScript Typings Update**

* Updated the import statement in `iOSCommonCookies.ts` to include the
new `CookieClearResult` type.

Author: alejandroruizponce

packages/public/ios-common-cookies/ios/iOSCommonCookiesModule.swift

@@ -45,6 +45,40 @@ public class iOSCommonCookiesModule: Module {
       }
     }
 
+    // Clear all cookies from HTTPCookieStorage and WKWebView cookie store.
+    AsyncFunction("clearAllCookies") { (promise: Promise) in
+      DispatchQueue.main.async {
+        // 1) Clear HTTPCookieStorage
+        let httpStorage = HTTPCookieStorage.shared
+        let httpCookies = httpStorage.cookies ?? []
+        let httpCount = httpCookies.count
+        for cookie in httpCookies {
+          httpStorage.deleteCookie(cookie)
+        }
+
+        // 2) Clear WKWebView cookie store
+        let cookieStore = WKWebsiteDataStore.default().httpCookieStore
+        cookieStore.getAllCookies { wkCookies in
+          let wkCount = wkCookies.count
+          let group = DispatchGroup()
+
+          for cookie in wkCookies {
+            group.enter()
+            cookieStore.delete(cookie) {
+              group.leave()
+            }
+          }
+
+          group.notify(queue: .main) {
+            promise.resolve([
+              "clearedHTTP": httpCount,
+              "clearedWebView": wkCount
+            ])
+          }
+        }
+      }
+    }
+
     // Best-effort two-way sync: HTTP -> WebView, then WebView -> HTTP.
     AsyncFunction("syncCookiesBidirectional") { (promise: Promise) in
       DispatchQueue.main.async {

packages/public/ios-common-cookies/src/iOSCommonCookies.ts

@@ -1,6 +1,6 @@
 import { NativeModule, requireNativeModule } from "expo-modules-core";
 
-import type { CookieBidirectionalSyncResult, CookieSyncResult } from "./iOSCommonCookies.types";
+import type { CookieBidirectionalSyncResult, CookieSyncResult, CookieClearResult } from "./iOSCommonCookies.types";
 
 declare class iOSCommonCookiesModule extends NativeModule {
   /** Copy cookies from HTTPCookieStorage -> WKWebsiteDataStore.default().httpCookieStore */
@@ -9,6 +9,9 @@ declare class iOSCommonCookiesModule extends NativeModule {
   /** Copy cookies from WKWebsiteDataStore.default().httpCookieStore -> HTTPCookieStorage */
   syncCookiesFromWebView(): Promise<CookieSyncResult>;
 
+  /** Clear all cookies from HTTPCookieStorage and WKWebView cookie store */
+  clearAllCookies(): Promise<CookieClearResult>;
+
   /** Best-effort two-way sync (HTTP -> WebView, then WebView -> HTTP) */
   syncCookiesBidirectional(): Promise<CookieBidirectionalSyncResult>;
 }

packages/public/ios-common-cookies/src/iOSCommonCookies.types.ts

@@ -7,3 +7,8 @@ export type CookieBidirectionalSyncResult = CookieSyncResult & {
   fromHTTP: number;
   fromWebView: number;
 };
+
+export type CookieClearResult = {
+  clearedHTTP: number;
+  clearedWebView: number;
+};