1 files changed, 65 insertions, 0 deletions
diff --git a/devtools/client/application/src/reducers/workers-state.js b/devtools/client/application/src/reducers/workers-state.js
new file mode 100644
index 0000000000..004c25ddfa
--- /dev/null
+++ b/devtools/client/application/src/reducers/workers-state.js
@@ -0,0 +1,65 @@
+/* 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";
+
+const {
+  START_WORKER,
+  UNREGISTER_WORKER,
+  UPDATE_CAN_DEBUG_WORKERS,
+  UPDATE_WORKERS,
+} = require("resource://devtools/client/application/src/constants.js");
+
+function WorkersState() {
+  return {
+    // Array of all service worker registrations
+    list: [],
+    canDebugWorkers: false,
+  };
+}
+
+function buildWorkerDataFromFronts({ registration, workers }) {
+  return {
+    id: registration.id,
+    lastUpdateTime: registration.lastUpdateTime,
+    registrationFront: registration,
+    scope: registration.scope,
+    workers: workers.map(worker => ({
+      id: worker.id,
+      url: worker.url,
+      state: worker.state,
+      stateText: worker.stateText,
+      registrationFront: registration,
+      workerDescriptorFront: worker.workerDescriptorFront,
+    })),
+  };
+}
+
+function workersReducer(state = WorkersState(), action) {
+  switch (action.type) {
+    case UPDATE_CAN_DEBUG_WORKERS: {
+      return Object.assign({}, state, {
+        canDebugWorkers: action.canDebugWorkers,
+      });
+    }
+    case UPDATE_WORKERS: {
+      const { workers } = action;
+      return Object.assign({}, state, {
+        list: workers.map(buildWorkerDataFromFronts).flat(),
+      });
+    }
+    // these actions don't change the state, but get picked up by the
+    // telemetry middleware
+    case START_WORKER:
+    case UNREGISTER_WORKER:
+      return state;
+    default:
+      return state;
+  }
+}
+
+module.exports = {
+  WorkersState,
+  workersReducer,
+};