Add SnapWebviewPostMessageStream

app/components/Views/Wallet/SnapWebviewPostMessageStream.ts

@@ -0,0 +1,58 @@
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-nocheck
+import { BasePostMessageStream } from '@metamask/post-message-stream';
+
+interface WebViewPostMessageStreamArgs {
+  name: string;
+  stream: any;
+  jobId: string;
+}
+
+/**
+ * A {@link Window.postMessage} stream.
+ */
+export default class SnapWebviewPostMessageStream extends BasePostMessageStream {
+  private _name: string;
+
+  private _stream: string;
+  private _jobId: string;
+  /**
+   * Creates a stream for communicating with other streams across the same or
+   * different `window` objects.
+   *
+   * @param args - Options bag.
+   * @param args.name - The name of the stream. Used to differentiate between
+   * multiple streams sharing the same window object.
+   * @param args.target - The name of the stream to exchange messages with.
+   * @param args.targetOrigin - The origin of the target. Defaults to
+   * `location.origin`, '*' is permitted.
+   * @param args.targetWindow - The window object of the target stream. Defaults
+   * to `window`.
+   */
+  constructor({ name, stream, jobId }: WebViewPostMessageStreamArgs) {
+    super();
+
+    this._name = name;
+    this._stream = stream;
+    this._jobId = jobId;
+    this._onMessage = this._onMessage.bind(this);
+    this._stream.on('data', (data) => this._onMessage(data));
+    // this._handshake();
+  }
+
+  protected _postMessage(data: unknown): void {
+    console.log('SnapWebviewPostMessageStreamon _postMessage', data);
+    this._stream.write(data);
+  }
+
+  private _onMessage(data: any): void {
+    console.log('SnapWebviewPostMessageStreamon _onMessage', data);
+    this._onData(data);
+  }
+
+  destroy(): void {
+    // eslint-disable-next-line no-console
+    console.log('SnapWebviewPostMessageStream - method destroy');
+    this.destroyed = true;
+  }
+}