Handle suspend/resume error from watch stream read (#2136)

* handle suspend/resume error from stream read

Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>

* add missing types

Signed-off-by: Jari Kolehmainen <jari.kolehmainen@gmail.com>

src/renderer/utils/readableStream.ts

@@ -0,0 +1,87 @@
+import { Readable } from "readable-stream";
+
+/**
+ * ReadableWebToNodeStream
+ *
+ * Copied from https://github.com/Borewit/readable-web-to-node-stream
+ *
+ * Adds read error handler
+ *
+ * */
+export class ReadableWebToNodeStream extends Readable {
+
+  public bytesRead = 0;
+  public released = false;
+
+  /**
+   * Default web API stream reader
+   * https://developer.mozilla.org/en-US/docs/Web/API/ReadableStreamDefaultReader
+   */
+  private reader: ReadableStreamReader;
+  private pendingRead: Promise<any>;
+
+  /**
+   *
+   * @param stream Readable​Stream: https://developer.mozilla.org/en-US/docs/Web/API/ReadableStream
+   */
+  constructor(stream: ReadableStream) {
+    super();
+    this.reader = stream.getReader();
+  }
+
+  /**
+   * Implementation of readable._read(size).
+   * When readable._read() is called, if data is available from the resource,
+   * the implementation should begin pushing that data into the read queue
+   * https://nodejs.org/api/stream.html#stream_readable_read_size_1
+   */
+  public async _read() {
+    // Should start pushing data into the queue
+    // Read data from the underlying Web-API-readable-stream
+    if (this.released) {
+      this.push(null); // Signal EOF
+
+      return;
+    }
+
+    try {
+      this.pendingRead = this.reader.read();
+      const data = await this.pendingRead;
+
+      // clear the promise before pushing pushing new data to the queue and allow sequential calls to _read()
+      delete this.pendingRead;
+
+      if (data.done || this.released) {
+        this.push(null); // Signal EOF
+      } else {
+        this.bytesRead += data.value.length;
+        this.push(data.value); // Push new data to the queue
+      }
+    } catch(error) {
+      this.push(null); // Signal EOF
+    }
+  }
+
+  /**
+   * If there is no unresolved read call to Web-API Readable​Stream immediately returns;
+   * otherwise will wait until the read is resolved.
+   */
+  public async waitForReadToComplete() {
+    if (this.pendingRead) {
+      await this.pendingRead;
+    }
+  }
+
+  /**
+   * Close wrapper
+   */
+  public async close(): Promise<void> {
+    await this.syncAndRelease();
+  }
+
+  private async syncAndRelease() {
+    this.released = true;
+    await this.waitForReadToComplete();
+    await this.reader.releaseLock();
+  }
+}