Initial commit

Co-Authored-By: Eric Tuvesson <eric.tuvesson@gmail.com>
Co-Authored-By: mikaeltellhed <2311083+mikaeltellhed@users.noreply.github.com>
Co-Authored-By: kotte <14197736+mrtamagotchi@users.noreply.github.com>
Co-Authored-By: Anders Larsson <64838990+anders-topp@users.noreply.github.com>
Co-Authored-By: Johan  <4934465+joolsus@users.noreply.github.com>
Co-Authored-By: Tore Knudsen <18231882+torekndsn@users.noreply.github.com>
Co-Authored-By: victoratndl <99176179+victoratndl@users.noreply.github.com>

packages/noodl-viewer-react/src/async-queue.js

@@ -0,0 +1,47 @@
+export default class ASyncQueue {
+  constructor() {
+    this.queue = [];
+    this.pendingPromise = false;
+  }
+
+  enqueue(promise) {
+    return new Promise((resolve, reject) => {
+      this.queue.push({
+        promise,
+        resolve,
+        reject
+      });
+      this.dequeue();
+    });
+  }
+
+  dequeue() {
+    if (this.workingOnPromise) {
+      return false;
+    }
+    const item = this.queue.shift();
+    if (!item) {
+      return false;
+    }
+    try {
+      this.workingOnPromise = true;
+      item
+        .promise()
+        .then((value) => {
+          this.workingOnPromise = false;
+          item.resolve(value);
+          this.dequeue();
+        })
+        .catch((err) => {
+          this.workingOnPromise = false;
+          item.reject(err);
+          this.dequeue();
+        });
+    } catch (err) {
+      this.workingOnPromise = false;
+      item.reject(err);
+      this.dequeue();
+    }
+    return true;
+  }
+}