1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/client/shared/redux/middleware/task.js b/devtools/client/shared/redux/middleware/task.js
new file mode 100644
index 0000000000..1ffb033589
--- /dev/null
+++ b/devtools/client/shared/redux/middleware/task.js
@@ -0,0 +1,38 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+loader.lazyRequireGetter(
+  this,
+  ["executeSoon", "isAsyncFunction", "reportException"],
+  "resource://devtools/shared/DevToolsUtils.js",
+  true
+);
+
+const ERROR_TYPE = (exports.ERROR_TYPE = "@@redux/middleware/task#error");
+
+/**
+ * A middleware that allows async thunks (async functions) to be dispatched.
+ * The middleware is called "task" for historical reasons. TODO: rename?
+ */
+
+function task({ dispatch, getState }) {
+  return next => action => {
+    if (isAsyncFunction(action)) {
+      return action({ dispatch, getState }).catch(
+        handleError.bind(null, dispatch)
+      );
+    }
+    return next(action);
+  };
+}
+
+function handleError(dispatch, error) {
+  executeSoon(() => {
+    reportException(ERROR_TYPE, error);
+    dispatch({ type: ERROR_TYPE, error });
+  });
+}
+
+exports.task = task;