MA-18060: add supportsAsync

packages/core/src/bridge.ts

@@ -119,6 +119,9 @@ export const DESKTOP_METHODS = [
     : ['VKWebAppShowImages']),
 ];
 
+/** Cache for supported methods */
+let supportedHandlers: AnyRequestMethodName[];
+
 /** Android VK Bridge interface. */
 const androidBridge: Record<AnyRequestMethodName, (serializedData: string) => void> | undefined =
   IS_CLIENT_SIDE ? (window as any).AndroidBridge : undefined;
@@ -230,8 +233,11 @@ export function createVKBridge(version: string): VKBridge {
    *
    * @param method Method (event) name to check.
    * @returns Result of checking.
+   * @deprecated This method is deprecated. Use supportsAsync instead.
    */
   function supports<K extends AnyRequestMethodName>(method: K): boolean {
+    console.warn('This method is deprecated. Use supportsAsync instead.');
+
     if (IS_ANDROID_WEBVIEW) {
       // Android support check
       return !!(androidBridge && typeof androidBridge[method] === 'function');
@@ -342,12 +348,32 @@ export function createVKBridge(version: string): VKBridge {
    */
   const sendPromise = promisifySend(send, subscribe, instanceId);
 
+  async function supportsAsync(method: AnyRequestMethodName): Promise<boolean> {
+    if (IS_ANDROID_WEBVIEW || IS_IOS_WEBVIEW) {
+      return supports(method);
+    }
+
+    if (supportedHandlers) {
+      return supportedHandlers.includes(method);
+    }
+
+    try {
+      const response = await sendPromise('SetSupportedHandlers');
+      supportedHandlers = response.supportedHandlers;
+      return supportedHandlers.includes(method);
+    } catch (error) {
+      supportedHandlers = ['VKWebAppInit'];
+      return supportedHandlers.includes(method);
+    }
+  }
+
   return {
     send: sendPromise,
     sendPromise,
     subscribe,
     unsubscribe,
     supports,
+    supportsAsync,
     isWebView,
     isIframe,
     isEmbedded,

packages/core/src/types/bridge.ts

@@ -236,9 +236,18 @@ export interface VKBridge {
    *
    * @param method Method (event) name to check.
    * @returns Result of checking.
+   * @deprecated This method is deprecated. Use supportsAsync instead.
    */
   supports: <K extends AnyRequestMethodName>(method: K) => boolean;
 
+  /**
+   * Checks if a method is supported on runtime platform.
+   *
+   * @param method Method (event) name to check.
+   * @returns The Promise object with result of checking.
+   */
+  supportsAsync: <K extends AnyRequestMethodName>(method: K) => Promise<boolean>;
+
   /**
    * Checks whether the runtime is a WebView.
    *

packages/core/src/types/data.ts

@@ -1206,6 +1206,7 @@ export type RequestPropsMap = {
   VKWebAppCallGetStatus: {};
   VKWebAppRecommend: {};
   VKWebAppAddToProfile: AddToProfileRequest;
+  SetSupportedHandlers: {};
 };
 
 /**
@@ -1327,6 +1328,7 @@ export type ReceiveDataMap = {
   VKWebAppCallFinished: CallFinishedResponse;
   VKWebAppRecommend: { result: true };
   VKWebAppAddToProfile: AddToProfileResponse;
+  SetSupportedHandlers: { supportedHandlers: Array<keyof RequestPropsMap> };
 };
 /* eslint-enable @typescript-eslint/ban-types */